Pub Date : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398631
N. Atan, B. Yunus
This paper presents the implementations of a new control algorithm for a three-phase shunt active power filter to regulate load terminal voltage, eliminate harmonics, and improve the power factor in systems with an uncontrolled rectifier and an AC controller as the non-linear loads. Different methods are used to control the active power filters. The reference current to be detected from the load current and processed by the active power filter controller is obtained from two different control algorithms, namely the Instantaneous Reactive Power Theory (PQ Theory) and Synchronous Reference Frame Theory (SRF Theory). The system is modeled and simulated using MATLAB/Simulink simulation package with a shunt active power filter to compensate for the harmonics current injected by the loads. It is then interfaced and verified using a Real-Time Digital Signal Processor DS1104 accompanied by an application (dSPACE) that is employed to view the simulation results and control the parameters of the simulation.
{"title":"Evaluation of reference signal estimation techniques for the control of shunt active power filter","authors":"N. Atan, B. Yunus","doi":"10.1109/ICEENVIRON.2009.5398631","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398631","url":null,"abstract":"This paper presents the implementations of a new control algorithm for a three-phase shunt active power filter to regulate load terminal voltage, eliminate harmonics, and improve the power factor in systems with an uncontrolled rectifier and an AC controller as the non-linear loads. Different methods are used to control the active power filters. The reference current to be detected from the load current and processed by the active power filter controller is obtained from two different control algorithms, namely the Instantaneous Reactive Power Theory (PQ Theory) and Synchronous Reference Frame Theory (SRF Theory). The system is modeled and simulated using MATLAB/Simulink simulation package with a shunt active power filter to compensate for the harmonics current injected by the loads. It is then interfaced and verified using a Real-Time Digital Signal Processor DS1104 accompanied by an application (dSPACE) that is employed to view the simulation results and control the parameters of the simulation.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124361168","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398604
A. Ikram, A. A. Rahman, N. Mostafa, A. Shamsuddin
A lab scale cyclonic combustor is in developmental stage for firing coal-biomass blends. The lab scale test rig would be used to support a study of coal-biomass co-combustion in a selected real pulverized coal, tangentially fired power plant. The conceptual design is made similar to the two-stage inverted cyclonic combustor at Cardiff University (A. Abd Rahman and N. Syred), previously used in a completed EU commissioned study on co-combustion. The design consists of two stages where the primary reactor is for fuel gasification and devolatilisation of volatile matters, followed by a secondary reactor for complete combustion of fuel. Cyclonic combustion is chosen as it can provide high turbulence during combustion, and the assumed flow path of particles mimics that of a real tangential boiler. The design would also allow the particle residence time to be in the same order to a real boiler. In order to better understand the cyclonic combustion process and optimize the rig operation, computational fluid dynamics (CFD) is used. At the current stage, CFD simulation of the flowpath is chosen to prove the subject as having a turbulence flow, before continuing with combustion simulation, and actual fabrication of the cyclonic combustor.
实验室规模的燃烧煤-生物质混合燃料的旋流燃烧室正处于研制阶段。实验室规模的试验台将用于支持在选定的真实煤粉切线燃烧电厂中进行煤-生物质共燃烧的研究。概念设计类似于卡迪夫大学(a . Abd Rahman和N. Syred)的两级倒置旋风燃烧器，该燃烧器先前用于完成欧盟委托的共燃烧研究。该设计包括两个阶段，其中主反应堆用于燃料气化和挥发性物质的脱挥发，其次是二级反应堆用于燃料的完全燃烧。选择旋风燃烧是因为它可以在燃烧过程中提供高湍流，并且假设的颗粒流动路径模拟了实际切向锅炉的流动路径。该设计还将允许颗粒停留时间在同一顺序，以一个真正的锅炉。为了更好地了解旋流燃烧过程并优化钻井操作，应用了计算流体动力学(CFD)。现阶段，在继续燃烧模拟和实际制造旋风燃烧室之前，选择CFD流道模拟来证明主体存在湍流流动。
{"title":"Path flow study of a lab scale cyclonic combustor for coal-biomass co-combustion","authors":"A. Ikram, A. A. Rahman, N. Mostafa, A. Shamsuddin","doi":"10.1109/ICEENVIRON.2009.5398604","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398604","url":null,"abstract":"A lab scale cyclonic combustor is in developmental stage for firing coal-biomass blends. The lab scale test rig would be used to support a study of coal-biomass co-combustion in a selected real pulverized coal, tangentially fired power plant. The conceptual design is made similar to the two-stage inverted cyclonic combustor at Cardiff University (A. Abd Rahman and N. Syred), previously used in a completed EU commissioned study on co-combustion. The design consists of two stages where the primary reactor is for fuel gasification and devolatilisation of volatile matters, followed by a secondary reactor for complete combustion of fuel. Cyclonic combustion is chosen as it can provide high turbulence during combustion, and the assumed flow path of particles mimics that of a real tangential boiler. The design would also allow the particle residence time to be in the same order to a real boiler. In order to better understand the cyclonic combustion process and optimize the rig operation, computational fluid dynamics (CFD) is used. At the current stage, CFD simulation of the flowpath is chosen to prove the subject as having a turbulence flow, before continuing with combustion simulation, and actual fabrication of the cyclonic combustor.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129186772","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398664
I. Daut, K. Anayet, S. Tirapathy
This paper will describe how finite element analysis can be utilize to design and model the performance of rotary electrical machines. Special interest placed on the induction motor since the design is simple, and has greatest influence in operation of electrical power system [1]. Transient AC analysis has been studied as it is necessary to examine the motor's performance dynamically. OPERA 2D software used as finite element analysis tool to design and model the performance of 0.5 hp, 4-pole, 1500 rpm induction motor.
{"title":"Design and modeling of induction motor using opera 2D based on aluminum material","authors":"I. Daut, K. Anayet, S. Tirapathy","doi":"10.1109/ICEENVIRON.2009.5398664","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398664","url":null,"abstract":"This paper will describe how finite element analysis can be utilize to design and model the performance of rotary electrical machines. Special interest placed on the induction motor since the design is simple, and has greatest influence in operation of electrical power system [1]. Transient AC analysis has been studied as it is necessary to examine the motor's performance dynamically. OPERA 2D software used as finite element analysis tool to design and model the performance of 0.5 hp, 4-pole, 1500 rpm induction motor.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121639450","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398649
N. M. Razali, M. H. Boosroh, H. Hasini, N. H. Shuaib
Combustion characteristics in large scale boilers are influenced by a number of factors such as coal properties and burner operating conditions. Burner firing angle for example, will affect the fireball size and locations of heat release which affect the formation of ash slagging in a tangentially fired furnace. In this study, a computational fluid dynamics (CFD) simulation of coal combustion in a tangentially fired 700 MW power plant was developed to investigate the impact of burner firing angles on the flame profile in the furnace. The model was developed based on the two-phase flow model, coal devolatilization, char burnout model, discrete particle tracking and radiation heat transfer. The firing angles were changed by ±5° from the base angle of 43° and 55°. The study shows that firing angles have significant effect on the size of the flame fireball and the concentric fireball arrangement. Increasing the firing angle resulted in a larger fireball size with a region of low temperature at the core of the fireball. The simulation also shows that the flow profile becomes more stable with increasing firing angle, regardless of burner elevations. The results presented in this paper may enhance the understanding the complex relation between burner operating condition such as firing angle on flow patterns and combustion processes in a tangentially fired boilers.
{"title":"Impact of tangential burner firing angle on combustion characteristics of large scale coal-fired boiler","authors":"N. M. Razali, M. H. Boosroh, H. Hasini, N. H. Shuaib","doi":"10.1109/ICEENVIRON.2009.5398649","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398649","url":null,"abstract":"Combustion characteristics in large scale boilers are influenced by a number of factors such as coal properties and burner operating conditions. Burner firing angle for example, will affect the fireball size and locations of heat release which affect the formation of ash slagging in a tangentially fired furnace. In this study, a computational fluid dynamics (CFD) simulation of coal combustion in a tangentially fired 700 MW power plant was developed to investigate the impact of burner firing angles on the flame profile in the furnace. The model was developed based on the two-phase flow model, coal devolatilization, char burnout model, discrete particle tracking and radiation heat transfer. The firing angles were changed by ±5° from the base angle of 43° and 55°. The study shows that firing angles have significant effect on the size of the flame fireball and the concentric fireball arrangement. Increasing the firing angle resulted in a larger fireball size with a region of low temperature at the core of the fireball. The simulation also shows that the flow profile becomes more stable with increasing firing angle, regardless of burner elevations. The results presented in this paper may enhance the understanding the complex relation between burner operating condition such as firing angle on flow patterns and combustion processes in a tangentially fired boilers.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121155284","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398650
M. Abdul Majid, N. H. Shuaib, H. Hasini, M. H. Boosroh
In this paper, High-Temperature Air Combustion (HiTAC) method utilizing coal as fuel is studied numerically using Computational Fluid Dynamics (CFD). A case study was performed using the CFD code FLUENT 6.2 to investigate the effects of utilizing high temperature air combustion on a real 700MW coal-powered boiler operating on a tangential firing mechanism. The results obtained were consistent with the ones reported in the literature. For high temperature air, a bigger flame structure and higher average temperature inside the boiler was found. The firing performance is found to be improved mainly due to formation of stable flame which further leads to the reduction in ignition delay.
{"title":"Numerical investigations on the effects of High Temperature Air Combustion in a coal-powered boiler","authors":"M. Abdul Majid, N. H. Shuaib, H. Hasini, M. H. Boosroh","doi":"10.1109/ICEENVIRON.2009.5398650","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398650","url":null,"abstract":"In this paper, High-Temperature Air Combustion (HiTAC) method utilizing coal as fuel is studied numerically using Computational Fluid Dynamics (CFD). A case study was performed using the CFD code FLUENT 6.2 to investigate the effects of utilizing high temperature air combustion on a real 700MW coal-powered boiler operating on a tangential firing mechanism. The results obtained were consistent with the ones reported in the literature. For high temperature air, a bigger flame structure and higher average temperature inside the boiler was found. The firing performance is found to be improved mainly due to formation of stable flame which further leads to the reduction in ignition delay.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116661751","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398637
R. A. Zahidi, I. Abidin, H. Hashim, Y. R. Omar, N. Ahmad, A. M. Ali
Under Voltage Load Shedding (UVLS) has been successfully deployed in many systems throughout the world to protect local systems from voltage collapse. This is particularly true if the system conditions and the contingencies leading to voltage instabilities are of low probability, but would result in serious consequences. However, the locations and how much load to shed requires expert knowledge and experience working with the power grid. This paper will present on utilizing an established index called FVSI (Fast Voltage Stability Index) to act as a numerical verification of the shedding locations. The research work done shows that the FVSI index can be used and load shedding at these points does improve the stability of the system.
{"title":"Study of static voltage stability index as an indicator for Under Voltage Load Shedding schemes","authors":"R. A. Zahidi, I. Abidin, H. Hashim, Y. R. Omar, N. Ahmad, A. M. Ali","doi":"10.1109/ICEENVIRON.2009.5398637","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398637","url":null,"abstract":"Under Voltage Load Shedding (UVLS) has been successfully deployed in many systems throughout the world to protect local systems from voltage collapse. This is particularly true if the system conditions and the contingencies leading to voltage instabilities are of low probability, but would result in serious consequences. However, the locations and how much load to shed requires expert knowledge and experience working with the power grid. This paper will present on utilizing an established index called FVSI (Fast Voltage Stability Index) to act as a numerical verification of the shedding locations. The research work done shows that the FVSI index can be used and load shedding at these points does improve the stability of the system.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114885075","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398663
Aidil Azwin Zainul, A. Ramasamy, I. Abidin, F. Nagi
The inverse time overcurrent relay operation is based upon the current setpoint and also the time multiplier setting. Depending on the ratio of the value of the current and the setpoint current together with the value of the time multiplier setting, the amount of time delay for the trip command is determined using the inverse time characteristics. This would mean that the relay is not of the adaptive type and would possibly give a maltripping. This paper uses the concept of PID controller to determine the time delay for the overcurrent relay.
{"title":"Overcurrent time delay determination using gain scheduled PID controllers","authors":"Aidil Azwin Zainul, A. Ramasamy, I. Abidin, F. Nagi","doi":"10.1109/ICEENVIRON.2009.5398663","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398663","url":null,"abstract":"The inverse time overcurrent relay operation is based upon the current setpoint and also the time multiplier setting. Depending on the ratio of the value of the current and the setpoint current together with the value of the time multiplier setting, the amount of time delay for the trip command is determined using the inverse time characteristics. This would mean that the relay is not of the adaptive type and would possibly give a maltripping. This paper uses the concept of PID controller to determine the time delay for the overcurrent relay.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121408082","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398629
R. Samsudin, A. Ramli, A. Berhanuddin, Y. Zaidey
Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degradation of the paper insulation will be accelerated with the presence of electrical fault. Electrical fault in power transformer can be categorized into two which are Partial Discharge (PD) and Arcing. A PD will eventually develop into arcing. Any electrical fault in the transformer can be detected by using Dissolved Gas Analysis technique. The DGA can be used to differentiate between the types of faults in the transformer. However, DGA alone is not conclusive in determining the electrical fault in the transformer. As a complement, acoustic partial discharge technique was used to detect the electrical fault in the transformer. In this paper, the detection of electrical fault in two units of 33/11kV, 15MVA transformers were done by using Dissolved Gas Analysis (DGA). Then, the acoustic partial discharge test was carried out to detect the activity and locate the source of the electrical fault. During the acoustic partial discharge testing, some electrical discharge signal was picked-up from On-Load Tap Changer (OLTC) tank. Then, the transformers were un-tanking for physical inspection. Based on the inspection done on two transformers, the DGA analysis methods were unable to detect the OLTC oil contamination in the main tank oil and it is very dependent on the transformer conservator tank design. The acoustic partial discharge technique proves to be a useful tool in detecting electrical discharges in the power transformer.
{"title":"Field experience of transformer untanking to identify electrical faults and comparison with Dissolved Gas Analysis","authors":"R. Samsudin, A. Ramli, A. Berhanuddin, Y. Zaidey","doi":"10.1109/ICEENVIRON.2009.5398629","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398629","url":null,"abstract":"Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degradation of the paper insulation will be accelerated with the presence of electrical fault. Electrical fault in power transformer can be categorized into two which are Partial Discharge (PD) and Arcing. A PD will eventually develop into arcing. Any electrical fault in the transformer can be detected by using Dissolved Gas Analysis technique. The DGA can be used to differentiate between the types of faults in the transformer. However, DGA alone is not conclusive in determining the electrical fault in the transformer. As a complement, acoustic partial discharge technique was used to detect the electrical fault in the transformer. In this paper, the detection of electrical fault in two units of 33/11kV, 15MVA transformers were done by using Dissolved Gas Analysis (DGA). Then, the acoustic partial discharge test was carried out to detect the activity and locate the source of the electrical fault. During the acoustic partial discharge testing, some electrical discharge signal was picked-up from On-Load Tap Changer (OLTC) tank. Then, the transformers were un-tanking for physical inspection. Based on the inspection done on two transformers, the DGA analysis methods were unable to detect the OLTC oil contamination in the main tank oil and it is very dependent on the transformer conservator tank design. The acoustic partial discharge technique proves to be a useful tool in detecting electrical discharges in the power transformer.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116512438","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398638
S. Sulaiman, I. Abidin
Water treeing is a phenomenon whereby the polymeric cable suffers serious degradation under combined stresses of electrical, thermal and chemical, thus shortening the lifespan of the cable. A high electrical field stress present at the tip of a water tree structure would degrade the surrounding healthy polymeric insulation, leading to electrical treeing and subsequent breakdown of the water tree affected polymeric cable. This paper aims at proposing methods to estimate the electric field stress ratios of water tree structures present in the insulation of water tree affected polymeric cables. The capacitances and lengths of water tree structures present the insulation were measured in water tree affected polymeric samples over a period. The measured data were then used in the proposed methodology to estimate the maximum electric field stress ratios present at the tips of the water tree structures, using electrostatic finite element software. A database of the electric field stress ratios was compiled and subsequently fed into the neural network's back propagation process. With the optimisation of weights in the neural network's back propagation process, an averaged error of less than 5% was found. This newly developed intelligent system provides a simple, time saving and practical way of obtaining electric field ratios.
{"title":"Methods to estimate electric field stress ratios within water tree structures in polymeric cables","authors":"S. Sulaiman, I. Abidin","doi":"10.1109/ICEENVIRON.2009.5398638","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398638","url":null,"abstract":"Water treeing is a phenomenon whereby the polymeric cable suffers serious degradation under combined stresses of electrical, thermal and chemical, thus shortening the lifespan of the cable. A high electrical field stress present at the tip of a water tree structure would degrade the surrounding healthy polymeric insulation, leading to electrical treeing and subsequent breakdown of the water tree affected polymeric cable. This paper aims at proposing methods to estimate the electric field stress ratios of water tree structures present in the insulation of water tree affected polymeric cables. The capacitances and lengths of water tree structures present the insulation were measured in water tree affected polymeric samples over a period. The measured data were then used in the proposed methodology to estimate the maximum electric field stress ratios present at the tips of the water tree structures, using electrostatic finite element software. A database of the electric field stress ratios was compiled and subsequently fed into the neural network's back propagation process. With the optimisation of weights in the neural network's back propagation process, an averaged error of less than 5% was found. This newly developed intelligent system provides a simple, time saving and practical way of obtaining electric field ratios.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123060336","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 : 2009-12-01DOI: 10.1109/ICEENVIRON.2009.5398619
A. A. Z. Zainul Abidin, A. Ramasamy, I. Abidin, F. Nagi
Power systems are usually connected in a condition where there is more than one power supply or voltage source supplying a load. These systems will have protection relays to protect various equipment connected to the system. However in isolating a fault, the direction of the fault needs to be known in order to limit the amount of loss load. This paper shall describe a possible algorithm that could be used in order to perform cross phase polarization. The possible faults that could be detected using this technique include the single phase to ground fault, the phase to phase fault and the double phase to ground fault. Three phase faults require the memory polarization technique that will not be discussed in this paper. The algorithm shall be implemented and tested using the sim power system tool box present in MATLAB.
{"title":"Cross phase polarization algorithm for fault direction determination using zero crossing method to determine phase difference","authors":"A. A. Z. Zainul Abidin, A. Ramasamy, I. Abidin, F. Nagi","doi":"10.1109/ICEENVIRON.2009.5398619","DOIUrl":"https://doi.org/10.1109/ICEENVIRON.2009.5398619","url":null,"abstract":"Power systems are usually connected in a condition where there is more than one power supply or voltage source supplying a load. These systems will have protection relays to protect various equipment connected to the system. However in isolating a fault, the direction of the fault needs to be known in order to limit the amount of loss load. This paper shall describe a possible algorithm that could be used in order to perform cross phase polarization. The possible faults that could be detected using this technique include the single phase to ground fault, the phase to phase fault and the double phase to ground fault. Three phase faults require the memory polarization technique that will not be discussed in this paper. The algorithm shall be implemented and tested using the sim power system tool box present in MATLAB.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132073471","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：