Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548229
Sadeq D. Al-Majidi, Mohammed Kh. Al-Nussairi, Jabber Raheem Rashed, M. Abbod
The connections of roof-top photovoltaic (PV) systems with low voltage distribution networks have been raised dramatically in the last years due to decreasing in the capital cost and investing in the operating cost. However, the power generation of this source is variable owing to the solar irradiance dependency. This variation in the PV generation can cause a Total Harmonic Distortion (THD) into the low voltage distribution network. In this paper, the effect of roof-top PV system installations on the total harmonic distortion is assessed under different weather conditions. Regarding this, the voltage and current of an on-grid PV system composited at the roof-top of Brunel university London campus are measured and analysed for sunny and cloudy days. Furthermore, this installed PV system is developed based on MATLAB/Simulink. The results prove that the solar irradiance of the surround PV system has a significant impact on the THD-current when compared with the THD-voltage.
{"title":"Assessment of Roof-Top Photovoltaic Installations on the Total Harmonic Distortion of Low Voltage Distribution Networks","authors":"Sadeq D. Al-Majidi, Mohammed Kh. Al-Nussairi, Jabber Raheem Rashed, M. Abbod","doi":"10.1109/UPEC50034.2021.9548229","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548229","url":null,"abstract":"The connections of roof-top photovoltaic (PV) systems with low voltage distribution networks have been raised dramatically in the last years due to decreasing in the capital cost and investing in the operating cost. However, the power generation of this source is variable owing to the solar irradiance dependency. This variation in the PV generation can cause a Total Harmonic Distortion (THD) into the low voltage distribution network. In this paper, the effect of roof-top PV system installations on the total harmonic distortion is assessed under different weather conditions. Regarding this, the voltage and current of an on-grid PV system composited at the roof-top of Brunel university London campus are measured and analysed for sunny and cloudy days. Furthermore, this installed PV system is developed based on MATLAB/Simulink. The results prove that the solar irradiance of the surround PV system has a significant impact on the THD-current when compared with the THD-voltage.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132434232","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548246
S. Robson, A. Haddad
The new generation of narrowband Power Line Communication (PLC) standards, notably PRIME and G3-PLC, take different approaches to time synchronisation. This paper presents a detailed performance analysis of G3-PLC’s novel approach, with a focus on the performance in the Additive White Gaussian Noise (AWGN) channel. The paper goes on to suggest modifications to the algorithm to enable better performance on the hostile power line channel. The methodology used is based on bespoke models of the synchronisation algorithms, coded in the MATLAB programming language, providing scope for probabilistic studies under different conditions.
{"title":"Analysis of the Performance of G3 Power Line Communication Synchronisation","authors":"S. Robson, A. Haddad","doi":"10.1109/UPEC50034.2021.9548246","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548246","url":null,"abstract":"The new generation of narrowband Power Line Communication (PLC) standards, notably PRIME and G3-PLC, take different approaches to time synchronisation. This paper presents a detailed performance analysis of G3-PLC’s novel approach, with a focus on the performance in the Additive White Gaussian Noise (AWGN) channel. The paper goes on to suggest modifications to the algorithm to enable better performance on the hostile power line channel. The methodology used is based on bespoke models of the synchronisation algorithms, coded in the MATLAB programming language, providing scope for probabilistic studies under different conditions.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130172904","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548180
A. Berdygozhin, Dauren S. Akhmetbayev, D. Campos-Gaona
Kazakhstan is going to increase the share of RES up to 10% until 2030 and up to 50% until 2050. The current share of RES is 3% and BESSs are not used. This paper analyzes the simplified national power grid and the ability of BESS participation in frequency regulation in accident loss of generation on one of the stations. The results show that BESS only is not enough to keep frequency in desirable restrictions.
{"title":"Modelling Stability Improvement In Kazakhstan’s Power System By Using Battery Energy Storage","authors":"A. Berdygozhin, Dauren S. Akhmetbayev, D. Campos-Gaona","doi":"10.1109/UPEC50034.2021.9548180","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548180","url":null,"abstract":"Kazakhstan is going to increase the share of RES up to 10% until 2030 and up to 50% until 2050. The current share of RES is 3% and BESSs are not used. This paper analyzes the simplified national power grid and the ability of BESS participation in frequency regulation in accident loss of generation on one of the stations. The results show that BESS only is not enough to keep frequency in desirable restrictions.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132036854","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548187
Arrmeila Jeyanathan, S. Chew, D. Stevenson, L. Cipcigan
In a collaborative project between Network Rail and Cardiff University, a comparative whole life cost analysis on two off-grid power supply solutions to power an Overlay Miniature Signal Light at an unprotected crossing was completed. Following a methodology closely aligned with Network Rail standards and BS EN 60300, a renewable off-grid power supply was designed in order to be compared with the non-renewable solution currently on trial on UK infrastructure. The whole life cost analysis was performed using HOMER Pro software where parametric cost estimating was used to populate the cost breakdown structure of each system. The new solution was developed from conducting a feasibility study on a case study location. Simulation results show that the new renewable solution demonstrates a positive investment after a 20-year lifetime where the net present values of the proposed and base system were £8,207 and £27,523.27 respectively. A roll out scenario of installation across 4,794 crossings was also done where the proposed solution showed to have a lower total whole life cost. Both solutions were modelled for the case study location Coedmawr Farm 2 Level Crossing in Carmarthenshire, Wales where an unprotecting crossing is situated.
在网络铁路和卡迪夫大学之间的合作项目中，完成了两种离网供电解决方案的全寿命成本比较分析，为无保护交叉路口的覆盖微型信号灯供电。遵循与网络铁路标准和BS EN 60300密切相关的方法，设计了可再生离网电源，以便与目前在英国基础设施中试用的不可再生解决方案进行比较。使用HOMER Pro软件进行全寿命成本分析，其中参数成本估算用于填充每个系统的成本分解结构。新的解决方案是通过对一个案例研究地点进行可行性研究而开发出来的。仿真结果表明，新的可再生能源解决方案在20年的使用寿命后显示出正投资，其中建议系统和基本系统的净现值分别为8,207英镑和27,523.27英镑。在4794个交叉路口安装的推广场景中，建议的解决方案显示出较低的全生命周期总成本。这两种解决方案都是针对案例研究地点Coedmawr Farm 2 Level Crossing进行建模的，该地点位于威尔士卡马森郡(Carmarthenshire)，那里有一个没有保护的十字路口。
{"title":"Whole Life Costing of Off- Grid Power Supplies for Rail Level Crossing Safety Systems","authors":"Arrmeila Jeyanathan, S. Chew, D. Stevenson, L. Cipcigan","doi":"10.1109/UPEC50034.2021.9548187","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548187","url":null,"abstract":"In a collaborative project between Network Rail and Cardiff University, a comparative whole life cost analysis on two off-grid power supply solutions to power an Overlay Miniature Signal Light at an unprotected crossing was completed. Following a methodology closely aligned with Network Rail standards and BS EN 60300, a renewable off-grid power supply was designed in order to be compared with the non-renewable solution currently on trial on UK infrastructure. The whole life cost analysis was performed using HOMER Pro software where parametric cost estimating was used to populate the cost breakdown structure of each system. The new solution was developed from conducting a feasibility study on a case study location. Simulation results show that the new renewable solution demonstrates a positive investment after a 20-year lifetime where the net present values of the proposed and base system were £8,207 and £27,523.27 respectively. A roll out scenario of installation across 4,794 crossings was also done where the proposed solution showed to have a lower total whole life cost. Both solutions were modelled for the case study location Coedmawr Farm 2 Level Crossing in Carmarthenshire, Wales where an unprotecting crossing is situated.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133950416","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548230
B. Radulescu, V. Radulescu
Romania, as part of the EU, develops new projects based on renewable sources in the supply of electricity and heat for small communities, in remote areas, or residential complexes. This paper presents a hybrid solution for partial supply of electricity to a school located in an area with solar potential, from the southeastern part of Romania. The school has an annual electricity consumption of 1,174 GWh with a peak electric load of 335 MW. At the beginning, some data referring to the geographical conditions of the area, based on environmental measurements and the energetic conditions, as the building structure, number of windows and walls, and scheme of the school operation are presented. Considering the existing electrical equipment and the lighting of the building, the total electricity consumption was estimated. The numerical simulation and tests of the elaborated mathematical model was realized for a school with 20 classes, on two levels, with two entrances and an inner courtyard. Some solutions to reduce electricity consumption and peak demand are mentioned. An optimization was performed based on the created model, taking into account the solar radiation available annually for this area of approximately 1500 kWh/m2/year. The results of these analyzes indicate that the implementation of the cost-effectiveness method for this building reduces electricity consumption by 18%, maximum demand by 21% and CO2 emissions by 11%, taking into account the minimization of consumption during the periods when the school is not functional (holidays, weekends.
{"title":"Hybrid Design Solution Optimized for Different Types of Buildings Using Renewable Energy","authors":"B. Radulescu, V. Radulescu","doi":"10.1109/UPEC50034.2021.9548230","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548230","url":null,"abstract":"Romania, as part of the EU, develops new projects based on renewable sources in the supply of electricity and heat for small communities, in remote areas, or residential complexes. This paper presents a hybrid solution for partial supply of electricity to a school located in an area with solar potential, from the southeastern part of Romania. The school has an annual electricity consumption of 1,174 GWh with a peak electric load of 335 MW. At the beginning, some data referring to the geographical conditions of the area, based on environmental measurements and the energetic conditions, as the building structure, number of windows and walls, and scheme of the school operation are presented. Considering the existing electrical equipment and the lighting of the building, the total electricity consumption was estimated. The numerical simulation and tests of the elaborated mathematical model was realized for a school with 20 classes, on two levels, with two entrances and an inner courtyard. Some solutions to reduce electricity consumption and peak demand are mentioned. An optimization was performed based on the created model, taking into account the solar radiation available annually for this area of approximately 1500 kWh/m2/year. The results of these analyzes indicate that the implementation of the cost-effectiveness method for this building reduces electricity consumption by 18%, maximum demand by 21% and CO2 emissions by 11%, taking into account the minimization of consumption during the periods when the school is not functional (holidays, weekends.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133462963","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548264
V. Radulescu
Steam injection is sometimes used to extract the crude oil, especially when it has high viscosity, as it is the case with the oil scaffolding. The paper presents an improved solution for the bottom coil boiler of the furnace to improve heat exchange. This method can also be used at installations in old buildings that have classic basement boilers, with are of low efficiency and high fuel consumption, compared to current the European standards. This model of boiler was tested for heating a three-room house, measuring the temperature at some key points of the boiler and house. At the oil scaffolding, the recovery boiler produces part of the steam necessary for the technological extraction process, being integrated in a cogeneration power plant. First, the mathematical model is presented, associated with certain technical specifications of the fuel, air, and flue gases. The changes implemented lead to the maximization of the operating time and yields, even if the supplying agent is inadequately prepared and the assembly and operating conditions are deficient. By calculating the total heat transfer coefficient and validating the overall thermal balance, it proves to be a better solution for this type of boiler. The mathematical model is well structured, because the differences between the values calculated by numerical modeling and those measured in specific nodes are below 4.2%. Due to the proposed change in the bottom coil the efficiency of this type of boiler has increased by about 7.1%.
{"title":"New solution for optimizing the operation of the bottom coil boiler to increase heat exchange","authors":"V. Radulescu","doi":"10.1109/UPEC50034.2021.9548264","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548264","url":null,"abstract":"Steam injection is sometimes used to extract the crude oil, especially when it has high viscosity, as it is the case with the oil scaffolding. The paper presents an improved solution for the bottom coil boiler of the furnace to improve heat exchange. This method can also be used at installations in old buildings that have classic basement boilers, with are of low efficiency and high fuel consumption, compared to current the European standards. This model of boiler was tested for heating a three-room house, measuring the temperature at some key points of the boiler and house. At the oil scaffolding, the recovery boiler produces part of the steam necessary for the technological extraction process, being integrated in a cogeneration power plant. First, the mathematical model is presented, associated with certain technical specifications of the fuel, air, and flue gases. The changes implemented lead to the maximization of the operating time and yields, even if the supplying agent is inadequately prepared and the assembly and operating conditions are deficient. By calculating the total heat transfer coefficient and validating the overall thermal balance, it proves to be a better solution for this type of boiler. The mathematical model is well structured, because the differences between the values calculated by numerical modeling and those measured in specific nodes are below 4.2%. Due to the proposed change in the bottom coil the efficiency of this type of boiler has increased by about 7.1%.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126123476","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548260
R. McCubbin, Kun Yang, R. Fan
The inertia and damping coefficients of a wind turbine define how the turbine reacts in a transient state. Unfortunately, the values of these coefficients are not always accurately known due to various reasons. This research uses machine learning techniques to determine these coefficients. By perturbing the values of inertia and damping coefficients, thousands of transient events were generated through simulations. The electrical measurements (real and reactive power) of the transient events were used to train a multilayer perceptron (MLP) network to learn the mapping between these time-series data with the corresponding coefficients. A support vector machine (SVM) based regression method was also used to predict the coefficient values using the same input data, and its performance was compared with the MLP approach. While both methods achieved acceptable results, the MLP method outperformed the SVM method by a large margin. A sensitivity analysis was also conducted to evaluate the impact of measurement noises and the size of the training data on the performance of machine learning based wind turbine parameter calibration.
{"title":"A Study of Wind Turbine Parameter Calibration Using Machine Learning Approaches","authors":"R. McCubbin, Kun Yang, R. Fan","doi":"10.1109/UPEC50034.2021.9548260","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548260","url":null,"abstract":"The inertia and damping coefficients of a wind turbine define how the turbine reacts in a transient state. Unfortunately, the values of these coefficients are not always accurately known due to various reasons. This research uses machine learning techniques to determine these coefficients. By perturbing the values of inertia and damping coefficients, thousands of transient events were generated through simulations. The electrical measurements (real and reactive power) of the transient events were used to train a multilayer perceptron (MLP) network to learn the mapping between these time-series data with the corresponding coefficients. A support vector machine (SVM) based regression method was also used to predict the coefficient values using the same input data, and its performance was compared with the MLP approach. While both methods achieved acceptable results, the MLP method outperformed the SVM method by a large margin. A sensitivity analysis was also conducted to evaluate the impact of measurement noises and the size of the training data on the performance of machine learning based wind turbine parameter calibration.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124202415","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548276
I. S. Bayram
Deep decarbonisation of the transportation requires widespread adoption of electric vehicles (EVs). Currently, the dominant energy storage technology for EVs is lithium based batteries which are designed to work under mild ambient temperatures (e.g. 21 Celsius). However, most cities with high EV penetration experience cold winter months when the performance of EVs is significantly degraded. In this paper, we present an impact assessment of cold weather EV charging on the power networks by reviewing existing literature on empirical studies related to battery performance, EV driving range, and charger characteristics. Two potential issues are identified. First, charging EVs at low temperatures significantly increases distribution network harmonics, hence limits the number of EVs that can be charged at the same time. Second, more frequent charging of EVs increases demand from the grid. To quantify this, a Monte Carlo based simulation is developed for the case of UK and results show that nearly 450 MW of extra generation is needed to cushion impacts of cold weather charging of 11 million vehicles. The problems pertinent to temperature effects on EV charging require greater attention as EVs are becoming the main mode of transport in the next decade.
{"title":"Impacts of Electric Vehicle Charging under Cold Weather on Power Networks","authors":"I. S. Bayram","doi":"10.1109/UPEC50034.2021.9548276","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548276","url":null,"abstract":"Deep decarbonisation of the transportation requires widespread adoption of electric vehicles (EVs). Currently, the dominant energy storage technology for EVs is lithium based batteries which are designed to work under mild ambient temperatures (e.g. 21 Celsius). However, most cities with high EV penetration experience cold winter months when the performance of EVs is significantly degraded. In this paper, we present an impact assessment of cold weather EV charging on the power networks by reviewing existing literature on empirical studies related to battery performance, EV driving range, and charger characteristics. Two potential issues are identified. First, charging EVs at low temperatures significantly increases distribution network harmonics, hence limits the number of EVs that can be charged at the same time. Second, more frequent charging of EVs increases demand from the grid. To quantify this, a Monte Carlo based simulation is developed for the case of UK and results show that nearly 450 MW of extra generation is needed to cushion impacts of cold weather charging of 11 million vehicles. The problems pertinent to temperature effects on EV charging require greater attention as EVs are becoming the main mode of transport in the next decade.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128773072","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548184
Jin Xu, M. Armstrong, M. Al-Greer
To rank System Identification (SI) requests of multi-rail power converters based on system variation severity in real time, this paper presents a ranking approach that dynamically updates priorities in hard-real-time. By comparing quantitated application importance and severities of system variations of rails, their ranks can be acquired. Besides, a window time is set aside in SI processes, only during which higher priority requests may interrupt SI processes of lower priority rails so that estimation opportunities can be provided to both high and low priority rails in rush hours. The paper also proposed to save intermediate iteration results, acquired from interrupted SI processes, for being continuously used once the processes recover to save computational cost. For validation, this technique is applied for a five-rail power conversion architecture. The proposed workflow also shows the high flexibility as all variables included in this approach are user-defined to match individual requirements.
{"title":"A Real-Time Prioritization Approach Applied for System Identification Request Coordination in Multi-Rail Power Conversion Architecture","authors":"Jin Xu, M. Armstrong, M. Al-Greer","doi":"10.1109/UPEC50034.2021.9548184","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548184","url":null,"abstract":"To rank System Identification (SI) requests of multi-rail power converters based on system variation severity in real time, this paper presents a ranking approach that dynamically updates priorities in hard-real-time. By comparing quantitated application importance and severities of system variations of rails, their ranks can be acquired. Besides, a window time is set aside in SI processes, only during which higher priority requests may interrupt SI processes of lower priority rails so that estimation opportunities can be provided to both high and low priority rails in rush hours. The paper also proposed to save intermediate iteration results, acquired from interrupted SI processes, for being continuously used once the processes recover to save computational cost. For validation, this technique is applied for a five-rail power conversion architecture. The proposed workflow also shows the high flexibility as all variables included in this approach are user-defined to match individual requirements.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128811250","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 : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548197
D. Audring, Ananya Kuri
The connection of new large renewable power plants has challenges for optimal integration into a power system. Proper assessment is essential to consider any possible impact, apply countermeasures, and optimize performance. Early cooperation with the transmission system operator is required to align grid operation, plant operation, and specialists' experience from the manufacturer. The transmission system operator needs to gain an accurate steady-state and dynamic model of the converter-based power plant and confirmation that the plant configuration complies with grid codes. The investigations allow the manufacturer to modify or optimize the controllers, assess the impact on the shaft and other components, and perform corrections in protection devices and relay settings. This ensures given performance guarantees and proper operation of the newly commissioned plant. Any possible impact on the power system or the converter interfaced generation (CIG) is assessed, and necessary countermeasures can be applied. The described procedure was successfully applied at several renewable power plant projects of different types, such as hydropower plants, Wind and PV parks, providing communities and countries with efficient and renewable electrical power. The dynamic models developed are optimized, improved, and validated.
{"title":"Modelling and challenges of integration of large renewable power plants","authors":"D. Audring, Ananya Kuri","doi":"10.1109/UPEC50034.2021.9548197","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548197","url":null,"abstract":"The connection of new large renewable power plants has challenges for optimal integration into a power system. Proper assessment is essential to consider any possible impact, apply countermeasures, and optimize performance. Early cooperation with the transmission system operator is required to align grid operation, plant operation, and specialists' experience from the manufacturer. The transmission system operator needs to gain an accurate steady-state and dynamic model of the converter-based power plant and confirmation that the plant configuration complies with grid codes. The investigations allow the manufacturer to modify or optimize the controllers, assess the impact on the shaft and other components, and perform corrections in protection devices and relay settings. This ensures given performance guarantees and proper operation of the newly commissioned plant. Any possible impact on the power system or the converter interfaced generation (CIG) is assessed, and necessary countermeasures can be applied. The described procedure was successfully applied at several renewable power plant projects of different types, such as hydropower plants, Wind and PV parks, providing communities and countries with efficient and renewable electrical power. The dynamic models developed are optimized, improved, and validated.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129538519","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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