Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011052
Y. M. Hamdani, U. Khayam
Partial discharge (PD) is a localized dielectric breakdown (which does not completely bridge the space between the two conductors) of a small portion of a solid or fluid electrical insulation system under high voltage stress. While a corona discharge is usually revealed by a relatively steady glow or brush discharge in air, partial discharges within solid insulation system are not visible. PD can occur in a gaseous, liquid or solid insulating medium. It often starts within gas voids, such as voids in solid epoxy insulation or bubbles in transformer oil. Protracted partial discharge can erode solid insulation and eventually lead to breakdown of insulation. One of the PD measurements in oil insulation is using UHF method, by measuring the waves generated by PD using antenna. One of antenna having good characteristics is UWB double layer printed antenna. In this paper the application of circular patch microstrip antenna for partial discharge detection is reported. The application of antenna on PD measurement in oil insulation, shows that the antenna is able to detect PD. The characteristics of PD: PDIV, PD waveform, PD phase pattern are measured using this antenna. The VNA testing of the antenna shows that the antenna bandwidth is 3.39 GHz.
{"title":"Application of Circular Patch Microstrip Antenna (CPMA) for Partial Discharge Detector in oil insulation","authors":"Y. M. Hamdani, U. Khayam","doi":"10.1109/ICHVEPS47643.2019.9011052","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011052","url":null,"abstract":"Partial discharge (PD) is a localized dielectric breakdown (which does not completely bridge the space between the two conductors) of a small portion of a solid or fluid electrical insulation system under high voltage stress. While a corona discharge is usually revealed by a relatively steady glow or brush discharge in air, partial discharges within solid insulation system are not visible. PD can occur in a gaseous, liquid or solid insulating medium. It often starts within gas voids, such as voids in solid epoxy insulation or bubbles in transformer oil. Protracted partial discharge can erode solid insulation and eventually lead to breakdown of insulation. One of the PD measurements in oil insulation is using UHF method, by measuring the waves generated by PD using antenna. One of antenna having good characteristics is UWB double layer printed antenna. In this paper the application of circular patch microstrip antenna for partial discharge detection is reported. The application of antenna on PD measurement in oil insulation, shows that the antenna is able to detect PD. The characteristics of PD: PDIV, PD waveform, PD phase pattern are measured using this antenna. The VNA testing of the antenna shows that the antenna bandwidth is 3.39 GHz.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"64 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87110252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011054
S. M. Ilman, A. Dahono, Muhammad Aji K. Prihambodo, Bintang Antares Y. Putra, A. Rizqiawan, P. Dahono
This paper proposes a control method for the modified dc-dc Cuk converter. The proposed modified dc-dc Cuk converter has an advantage compared to the conventional dc-dc Cuk converter. The output voltage polarity of this proposed converter is not reversed as in the conventional dc-dc Cuk converter, while the input and output currents are continuous similar to the conventional dc-dc Cuk converter. To control the proposed converter, a simple double loop controller is used. The outer loop controller is controlling the output voltage and the inner loop controller is controlling the inductor current. The inner loop and the outer loop are designed as propotional-integral (PI) control. The analytical approach for designing the control scheme is conducted by linearizing the small-signal model of the proposed converter to form the inductor current and output voltage transfer functions. These transfer functions will be analyzed by using phase and gain margin aproach to obtain the control parameters (Kp, Ki, and Ti). Simulated and experimental results are included to show the validity of the proposed concept.
{"title":"Analysis and Control of Modified DC-DC Cuk Converter","authors":"S. M. Ilman, A. Dahono, Muhammad Aji K. Prihambodo, Bintang Antares Y. Putra, A. Rizqiawan, P. Dahono","doi":"10.1109/ICHVEPS47643.2019.9011054","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011054","url":null,"abstract":"This paper proposes a control method for the modified dc-dc Cuk converter. The proposed modified dc-dc Cuk converter has an advantage compared to the conventional dc-dc Cuk converter. The output voltage polarity of this proposed converter is not reversed as in the conventional dc-dc Cuk converter, while the input and output currents are continuous similar to the conventional dc-dc Cuk converter. To control the proposed converter, a simple double loop controller is used. The outer loop controller is controlling the output voltage and the inner loop controller is controlling the inductor current. The inner loop and the outer loop are designed as propotional-integral (PI) control. The analytical approach for designing the control scheme is conducted by linearizing the small-signal model of the proposed converter to form the inductor current and output voltage transfer functions. These transfer functions will be analyzed by using phase and gain margin aproach to obtain the control parameters (Kp, Ki, and Ti). Simulated and experimental results are included to show the validity of the proposed concept.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"53 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73570848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011116
Bryan Denov, Ilham Hendratama, R. Zoro
Lightning phenomenon in Indonesia draws attention of a lot of lightning protection engineer because of its high annual lightning flash density which has the different lightning characteristic compare to sub-tropical lightning. Most of the oil and gas companies adopt the sub-tropical lightning characteristic for the protection of their facilities such as IEC, NFPA, etc. and these standards are applied by companies, consultants and engineers to many structures and facilities in Indonesia. Due to these tropical weather condition, tanks and refinery are not inherently self-protected against lightning direct strikes, they need additional protection to prevent direct strike to tank's metal skin, breather valve at the top of tanks and automatic tank gauging (ATG). Statistically, almost every year the tank is hit by lightning in Indonesia and burn out. An innovation technology calls extended mast terminal (EMT) and free-standing mast (FSM) are used to protect tanks and refinery from lightning direct strikes. A tank was directly hit by lightning and burn out in PT Pertamina EP Asset 5 Sangasanga area at East Kalimantan since in-proper lightning protection system was applied. It has been observed and analyzed that not only need the additional protection but proper additional lightning protection for tanks and refinery is needed.
{"title":"Lightning Protection System of Oil Storage Tank In Tropical Country","authors":"Bryan Denov, Ilham Hendratama, R. Zoro","doi":"10.1109/ICHVEPS47643.2019.9011116","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011116","url":null,"abstract":"Lightning phenomenon in Indonesia draws attention of a lot of lightning protection engineer because of its high annual lightning flash density which has the different lightning characteristic compare to sub-tropical lightning. Most of the oil and gas companies adopt the sub-tropical lightning characteristic for the protection of their facilities such as IEC, NFPA, etc. and these standards are applied by companies, consultants and engineers to many structures and facilities in Indonesia. Due to these tropical weather condition, tanks and refinery are not inherently self-protected against lightning direct strikes, they need additional protection to prevent direct strike to tank's metal skin, breather valve at the top of tanks and automatic tank gauging (ATG). Statistically, almost every year the tank is hit by lightning in Indonesia and burn out. An innovation technology calls extended mast terminal (EMT) and free-standing mast (FSM) are used to protect tanks and refinery from lightning direct strikes. A tank was directly hit by lightning and burn out in PT Pertamina EP Asset 5 Sangasanga area at East Kalimantan since in-proper lightning protection system was applied. It has been observed and analyzed that not only need the additional protection but proper additional lightning protection for tanks and refinery is needed.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"18 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86683620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011058
Nurcahyo Wibowo, Takafumi Mashimo, Toshihiro Takahashi, S. Suwarno
The aging defect in the pre-fabrication type XLPE cable termination still can appear at the interface between the stress-relief cone (SRC) and XLPE insulation, or the interface between SRC and the epoxy resin receptacle, even in a good installation process. It is also reported that the aging defect, i.e., deposits would be due to the deoiling of the silicone grease or oil, exuding chemical additives such as vulcanizing additives from SRC, from dismantlement observation of the decommissioned XLPE terminations. Such defects might easily ignite partial discharge (PD) combined with the formation of the delamination due to the thermal stress under its operation and finally lead to failure. In this paper, PD characteristics are discussed for the XLPE cable termination using void defect model. Then, an epoxy resin mixed with barium titanate is injected to the interface of the SRC and the XLPE cable, and its PD characteristics are investigated. Barium titanate is one of the highest ferroelectric materials and considered to be a suitable material to simulate the aging deposit. The PD characteristics are discussed from viewpoints of the number of pulses, maximum charge and PRPD pattern. From the experiment, it is revealed that barium titanate layer can affect electric field behaviour inside the SRC interface with the relatively stable condition of PD occurrence during observation, especially in the border area of semiconductive and insulation of the SRC.
{"title":"Temporal Transition of Partial Discharge Characteristics in XLPE Cable Joint Model Taking Account of Long-Term Operation and Deterioration","authors":"Nurcahyo Wibowo, Takafumi Mashimo, Toshihiro Takahashi, S. Suwarno","doi":"10.1109/ICHVEPS47643.2019.9011058","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011058","url":null,"abstract":"The aging defect in the pre-fabrication type XLPE cable termination still can appear at the interface between the stress-relief cone (SRC) and XLPE insulation, or the interface between SRC and the epoxy resin receptacle, even in a good installation process. It is also reported that the aging defect, i.e., deposits would be due to the deoiling of the silicone grease or oil, exuding chemical additives such as vulcanizing additives from SRC, from dismantlement observation of the decommissioned XLPE terminations. Such defects might easily ignite partial discharge (PD) combined with the formation of the delamination due to the thermal stress under its operation and finally lead to failure. In this paper, PD characteristics are discussed for the XLPE cable termination using void defect model. Then, an epoxy resin mixed with barium titanate is injected to the interface of the SRC and the XLPE cable, and its PD characteristics are investigated. Barium titanate is one of the highest ferroelectric materials and considered to be a suitable material to simulate the aging deposit. The PD characteristics are discussed from viewpoints of the number of pulses, maximum charge and PRPD pattern. From the experiment, it is revealed that barium titanate layer can affect electric field behaviour inside the SRC interface with the relatively stable condition of PD occurrence during observation, especially in the border area of semiconductive and insulation of the SRC.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"19 1","pages":"196-201"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83293877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011102
M. Zainuddin, Frengki Eka Putra Surusa, Wayan Eka Sastra Wibawa, S. Syafaruddin, S. Manjang
This study aims to analyze the stability response of the synchronous generators that work in parallel with photovoltaic (PV) power plants in a power system. The synchronous generator stability aspects measured are: rotor angle, rotor speed, active and reactive power, terminal current response, excitation current response in the generator, and PV generator responses. All aspects of the stability are simulated based on six conditions of daily solar irradiation, namely 200 W/m2, 400 W/m2, 600 W/m2, 800 W/m2, 1000 W/m2, and the condition of the power system without PV generation. The non-battery PV generator of 10 MWp connected with a transmission line uses an inverter in one of the substations. This research on electricity transmission lines is modeled in a single-line diagram of 7-buses. The existing transmission lines are supplied from two synchronous generator capacities, 100 MVA and 25 MVA. This result of this study shows that the high-penetration level of PV generator is able to increase the attenuation of the power oscillations in the synchronous generators. However, the high-penetration of the PV power is depended on the level of the solar irradiances affecting on any change of the synchronous generator stability.
{"title":"Synchronous Generator Stability Investigation in Power System with High-Penetration Photovoltaics Under Varying Solar Irradiances","authors":"M. Zainuddin, Frengki Eka Putra Surusa, Wayan Eka Sastra Wibawa, S. Syafaruddin, S. Manjang","doi":"10.1109/ICHVEPS47643.2019.9011102","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011102","url":null,"abstract":"This study aims to analyze the stability response of the synchronous generators that work in parallel with photovoltaic (PV) power plants in a power system. The synchronous generator stability aspects measured are: rotor angle, rotor speed, active and reactive power, terminal current response, excitation current response in the generator, and PV generator responses. All aspects of the stability are simulated based on six conditions of daily solar irradiation, namely 200 W/m2, 400 W/m2, 600 W/m2, 800 W/m2, 1000 W/m2, and the condition of the power system without PV generation. The non-battery PV generator of 10 MWp connected with a transmission line uses an inverter in one of the substations. This research on electricity transmission lines is modeled in a single-line diagram of 7-buses. The existing transmission lines are supplied from two synchronous generator capacities, 100 MVA and 25 MVA. This result of this study shows that the high-penetration level of PV generator is able to increase the attenuation of the power oscillations in the synchronous generators. However, the high-penetration of the PV power is depended on the level of the solar irradiances affecting on any change of the synchronous generator stability.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"3 1","pages":"316-321"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89922710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011155
M. Ridwan, J. Hartono, D. F. Dakhlan, Eko Aptono Tri Yuwono
Faulty condition caused by oscillation in a Java-Bali sub-system is investigated in this paper. The faulty condition is simulated by using power system simulation program to represent the real condition. The characteristic result of oscillation is analyzed by using the Prony method. The analysis of oscillation mode is done by decomposing the oscillation waveform into dominant frequency and damping ratio. System reconfigurations are developed by changing the generator supply direction and the setting of Power System Stabilizer (PSS). Each reconfiguration is simulated, and then the result is analyzed and compared to its default condition. Simulation result shows that by reconfiguring the direction of generation units to Middle-Java region and activating PSS of the generation unit can improve system stability.
{"title":"Small Signal Stability Analysis as Impact of System Reconfiguration","authors":"M. Ridwan, J. Hartono, D. F. Dakhlan, Eko Aptono Tri Yuwono","doi":"10.1109/ICHVEPS47643.2019.9011155","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011155","url":null,"abstract":"Faulty condition caused by oscillation in a Java-Bali sub-system is investigated in this paper. The faulty condition is simulated by using power system simulation program to represent the real condition. The characteristic result of oscillation is analyzed by using the Prony method. The analysis of oscillation mode is done by decomposing the oscillation waveform into dominant frequency and damping ratio. System reconfigurations are developed by changing the generator supply direction and the setting of Power System Stabilizer (PSS). Each reconfiguration is simulated, and then the result is analyzed and compared to its default condition. Simulation result shows that by reconfiguring the direction of generation units to Middle-Java region and activating PSS of the generation unit can improve system stability.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"33 1","pages":"114-118"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89117234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011047
A. Rajab, H. Andre, A. Pawawoi
This paper discusses gas production of monoesters under low thermal stresses and evaluation of fault interpretation methods to the oils. Two kinds of monoesters, namely the monoester having C=C bond and that without C=C were heated locally at the temperatures of 200, 250 and 300 °C. Three kind of fault interpretation methods, namely Key Gas, IEC ratio, and Duval Triangle methods are examined their applicability to the monoesters. The results show that the Key Gas and the IEC Ratio methods are not applicable. For the Duval Triangle, most of the tested oils are mistakenly put into the region dedicated to the fault of carbonized paper type. Therefore, the methods fail to interpret the low thermal stresses under the current experimental conditions.
{"title":"Gas Production and Fault Interpretation of Monoesters under Low Thermal Stresses","authors":"A. Rajab, H. Andre, A. Pawawoi","doi":"10.1109/ICHVEPS47643.2019.9011047","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011047","url":null,"abstract":"This paper discusses gas production of monoesters under low thermal stresses and evaluation of fault interpretation methods to the oils. Two kinds of monoesters, namely the monoester having C=C bond and that without C=C were heated locally at the temperatures of 200, 250 and 300 °C. Three kind of fault interpretation methods, namely Key Gas, IEC ratio, and Duval Triangle methods are examined their applicability to the monoesters. The results show that the Key Gas and the IEC Ratio methods are not applicable. For the Duval Triangle, most of the tested oils are mistakenly put into the region dedicated to the fault of carbonized paper type. Therefore, the methods fail to interpret the low thermal stresses under the current experimental conditions.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"129 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77081053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011106
Sinanuri Surawijaya, R. A. Prasojo, Winanda Riga Tamma, I. G. Ngurah Mahendrayana, Suwarno
For many years, to determine the type of inceptive failure on power transformers, practitioners often use the Dissolved Gas Analysis (DGA) to obtain conclusions about the causes of failures. To determine the failure that occurs in the transformer, the generation of certain gases within a transformer is an incredible indicator that has been proven so far. Because of the sensitivity and accuracy in measuring gases, this technique has become standard practice in normal maintenance activities at electric utility companies. This article presents the investigation of dissolved gas analysis (DGA) of four generator step-up (GSU) transformers at geothermal power plants in Indonesia. Each transformer insulating oil data were collected during yearly routine inspection and the DGA measurements at power plants for the duration of 6 years was obtained. DGA measurement result was analyzed and processed using the dissolved gas analysis method based on IEEE C57-104 and IEC 60599 standards. The interpretation of measurement data is conducted using four methods, that is key gas, gas ratio, Duval Triangle, and The Four Gases. Rogers Ratio, Doernenburg Ratio and Gas Ratio Combination are the gas ratio methods used in this study. The results of the diagnosis of generator step-up (GSU) transformers using DGA analysis showed that all four transformers were in different conditions for each analysis method. This paper highlights the importance of keeping track of DGA history and using several DGA interpretation methods to add confidence to the result.
{"title":"Diagnosis of Power Transformer Condition using Dissolved Gas Analysis Technique: Case Studies at Geothermal Power Plants In Indonesia","authors":"Sinanuri Surawijaya, R. A. Prasojo, Winanda Riga Tamma, I. G. Ngurah Mahendrayana, Suwarno","doi":"10.1109/ICHVEPS47643.2019.9011106","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011106","url":null,"abstract":"For many years, to determine the type of inceptive failure on power transformers, practitioners often use the Dissolved Gas Analysis (DGA) to obtain conclusions about the causes of failures. To determine the failure that occurs in the transformer, the generation of certain gases within a transformer is an incredible indicator that has been proven so far. Because of the sensitivity and accuracy in measuring gases, this technique has become standard practice in normal maintenance activities at electric utility companies. This article presents the investigation of dissolved gas analysis (DGA) of four generator step-up (GSU) transformers at geothermal power plants in Indonesia. Each transformer insulating oil data were collected during yearly routine inspection and the DGA measurements at power plants for the duration of 6 years was obtained. DGA measurement result was analyzed and processed using the dissolved gas analysis method based on IEEE C57-104 and IEC 60599 standards. The interpretation of measurement data is conducted using four methods, that is key gas, gas ratio, Duval Triangle, and The Four Gases. Rogers Ratio, Doernenburg Ratio and Gas Ratio Combination are the gas ratio methods used in this study. The results of the diagnosis of generator step-up (GSU) transformers using DGA analysis showed that all four transformers were in different conditions for each analysis method. This paper highlights the importance of keeping track of DGA history and using several DGA interpretation methods to add confidence to the result.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"20 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77493892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011136
Aditya Eka Purba Sejati, N. Hariyanto, K. M. Banjar-Nahor, Fathin Saifur Rahman, R. Rahmani
In general, the design of coal-fired power plants is not designed under flexible operating conditions. This flexibility will potentially cause changes in the operating pattern of coal-fired power plants, which operate at a minimum load. This pattern of operation will lead to increased use of coal, reduce the value of thermal efficiency, and possibly reduce equipment reliability. This paper presents an analysis of the impact of the flexibility of the coal-fired plant operation on its reliability. The solution that we propose in this paper is to integrate the coal-fired plant with Battery Energy Storage (BES). On scheme, the battery will be charged in a off-peak and will be discharged when a peak-load. We present several choices of BES in this paper, to find out more about this integration. in part 1 this will focus on how the impact of integration of coal power plants with battery energy storage in terms of heat rate levels, analysis is based on the effects of changes in heat rate levels of coal power plants during the use of BES and compared when not using BES.
{"title":"Increasing Reliability of Coal-Fired Plant by Integrating Battery Energy Storage (Part 1: Heat Rate Side)","authors":"Aditya Eka Purba Sejati, N. Hariyanto, K. M. Banjar-Nahor, Fathin Saifur Rahman, R. Rahmani","doi":"10.1109/ICHVEPS47643.2019.9011136","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011136","url":null,"abstract":"In general, the design of coal-fired power plants is not designed under flexible operating conditions. This flexibility will potentially cause changes in the operating pattern of coal-fired power plants, which operate at a minimum load. This pattern of operation will lead to increased use of coal, reduce the value of thermal efficiency, and possibly reduce equipment reliability. This paper presents an analysis of the impact of the flexibility of the coal-fired plant operation on its reliability. The solution that we propose in this paper is to integrate the coal-fired plant with Battery Energy Storage (BES). On scheme, the battery will be charged in a off-peak and will be discharged when a peak-load. We present several choices of BES in this paper, to find out more about this integration. in part 1 this will focus on how the impact of integration of coal power plants with battery energy storage in terms of heat rate levels, analysis is based on the effects of changes in heat rate levels of coal power plants during the use of BES and compared when not using BES.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84061702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICHVEPS47643.2019.9011053
Yulia Erina Sari, T. I. D. K. Dewi, S. Suwarno
Transformer is not only exposed by thermal aging, which causes several disturbances during its operation. But it is also exposed by electrical faults which lead the aging or degradation of electrical insulation. Therefore, electric arc aging is one of the most important factors that should be considered. It is very important to analyze the effects of accelerated electrical aging on chemical, dielectric, and physical properties to the oil performance. This research is conducted in order to assess the performance of natural ester during electric aging. Natural ester oil was made by using palm oil. Before it is used as liquid insulation, the viscosity has been reduced through transesterification processes. A triple needle-plane was immersed to the ester oil, and high voltage alternating current was injected to create an electrical arc for several minutes. The applied voltage was varied at 16 kV, 20 kV, and 24 kV (AC) as well as the arc duration, which varied at 0, 5, 10, and 15 minutes. Several measurements such as resistivity, relative permittivity, dielectric losses, breakdown voltage, and partial discharge have been conducted to observe the aging performance. The experiment results show that longer aging duration and higher applied voltage will fasten the degradation of the oil.
{"title":"The Effects of Electrical Arc Aging on Dielectric Properties and Partial Discharge Patterns of Natural Ester from Palm Oil","authors":"Yulia Erina Sari, T. I. D. K. Dewi, S. Suwarno","doi":"10.1109/ICHVEPS47643.2019.9011053","DOIUrl":"https://doi.org/10.1109/ICHVEPS47643.2019.9011053","url":null,"abstract":"Transformer is not only exposed by thermal aging, which causes several disturbances during its operation. But it is also exposed by electrical faults which lead the aging or degradation of electrical insulation. Therefore, electric arc aging is one of the most important factors that should be considered. It is very important to analyze the effects of accelerated electrical aging on chemical, dielectric, and physical properties to the oil performance. This research is conducted in order to assess the performance of natural ester during electric aging. Natural ester oil was made by using palm oil. Before it is used as liquid insulation, the viscosity has been reduced through transesterification processes. A triple needle-plane was immersed to the ester oil, and high voltage alternating current was injected to create an electrical arc for several minutes. The applied voltage was varied at 16 kV, 20 kV, and 24 kV (AC) as well as the arc duration, which varied at 0, 5, 10, and 15 minutes. Several measurements such as resistivity, relative permittivity, dielectric losses, breakdown voltage, and partial discharge have been conducted to observe the aging performance. The experiment results show that longer aging duration and higher applied voltage will fasten the degradation of the oil.","PeriodicalId":6677,"journal":{"name":"2019 2nd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)","volume":"176 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83783605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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