Pub Date : 2015-07-26DOI: 10.1109/PESGM.2015.7286488
M. Cvetković, A. Annaswamy
Reliability of the electricity grid against insufficient natural gas supply is becoming an increasingly relevant topic as the number of natural gas-fired generation units continues to grow. Without sufficient natural gas quantities at the market the loss of multiple generating units may occur with high probability. Existing power system operation practices are not designed to cope with the wide-spread fuel scarcity problem and great efforts are made by independent system operators (ISOs) and pipeline operators to improve interdependent system resiliency at all levels. In this paper we propose a combined real-time and regulation market which includes fuel scarcity signal to balance the requirements for optimal and resilient generation dispatch near real-time. The proposed approach is based on a distributed decision making algorithm known as dynamic market mechanism (DMM). On an example of the IEEE 14 bus system we show how the newly derived coupled market mechanism compares to today's decoupled operation of ISO-NE real-time and regulation markets under insufficient natural gas supply.
{"title":"Coupled ISO-NE real-time energy and regulation markets for reliability with natural gas","authors":"M. Cvetković, A. Annaswamy","doi":"10.1109/PESGM.2015.7286488","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286488","url":null,"abstract":"Reliability of the electricity grid against insufficient natural gas supply is becoming an increasingly relevant topic as the number of natural gas-fired generation units continues to grow. Without sufficient natural gas quantities at the market the loss of multiple generating units may occur with high probability. Existing power system operation practices are not designed to cope with the wide-spread fuel scarcity problem and great efforts are made by independent system operators (ISOs) and pipeline operators to improve interdependent system resiliency at all levels. In this paper we propose a combined real-time and regulation market which includes fuel scarcity signal to balance the requirements for optimal and resilient generation dispatch near real-time. The proposed approach is based on a distributed decision making algorithm known as dynamic market mechanism (DMM). On an example of the IEEE 14 bus system we show how the newly derived coupled market mechanism compares to today's decoupled operation of ISO-NE real-time and regulation markets under insufficient natural gas supply.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"124 19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132786190","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7286417
Ye Tao, Zhiwei Xu
Flexible energy usage is an important property of many loads. Power systems can achieve better social welfare from their flexibility. Besides, flexible loads are also a choice to offset the fluctuation in the power system from renewable energy, e.g. wind and solar. Since they are affected by enormous uncertain factors, it is still a challenge to predicate their power outputs accurately especially when the prediction executes several hours earlier. For example, the wind prediction at one day ahead may be far away from the real-time measurement. This prediction error can be counteracted by changing the schedules of flexible loads in real-time scheduling. Electricity market is a promising platform to coordinate the schedules of wind and flexible loads through financial tools. That is, flexible loads can receive incentive by providing flexibility to renewable resources under market rules, and renewable resources will hedge their prediction error by this flexibility. We outline a multi-settlement electricity market architecture to enable flexibility trading and propose a mechanism to mitigate the volatility risk by using energy options and financial rights under the proposed architecture. A trading sample and an IEEE benchmark system demonstrate the effectiveness of the proposed hedging mechanism.
{"title":"Coordination of renewable energy and flexible loads in electricity markets via financial tools","authors":"Ye Tao, Zhiwei Xu","doi":"10.1109/PESGM.2015.7286417","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286417","url":null,"abstract":"Flexible energy usage is an important property of many loads. Power systems can achieve better social welfare from their flexibility. Besides, flexible loads are also a choice to offset the fluctuation in the power system from renewable energy, e.g. wind and solar. Since they are affected by enormous uncertain factors, it is still a challenge to predicate their power outputs accurately especially when the prediction executes several hours earlier. For example, the wind prediction at one day ahead may be far away from the real-time measurement. This prediction error can be counteracted by changing the schedules of flexible loads in real-time scheduling. Electricity market is a promising platform to coordinate the schedules of wind and flexible loads through financial tools. That is, flexible loads can receive incentive by providing flexibility to renewable resources under market rules, and renewable resources will hedge their prediction error by this flexibility. We outline a multi-settlement electricity market architecture to enable flexibility trading and propose a mechanism to mitigate the volatility risk by using energy options and financial rights under the proposed architecture. A trading sample and an IEEE benchmark system demonstrate the effectiveness of the proposed hedging mechanism.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130861199","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285926
Jiaxin Yuan, Y. Lei, Baichao Chen
This paper analyzed the method of using FCL to enhance FRT capacity of FSWT and compared the performance of resistive-type fault current limiters (RFCL) and reactor-type fault current limiters (LFCL) of different limiting impedance. The minimum required value of the impedance for maintaining stable operation of FSWT during fault is determined, as well as dynamic stable speed and critical clearing time (CCT). The method has been validated by transient studies in a simple system by PSCAD/EMTDC. Simulation results demonstrate that the enhancement of FRT is related highly with the limiting impedance of FCL. The RFCL has the advantage of choosing limiting impedance and transient oscillate, while the LFCL with minimum required impedance has a better performance on the enhancement of FRT.
{"title":"Research on fault ride-through capacity enhancement of FSWT using fault current limiters of different types and impedance","authors":"Jiaxin Yuan, Y. Lei, Baichao Chen","doi":"10.1109/PESGM.2015.7285926","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285926","url":null,"abstract":"This paper analyzed the method of using FCL to enhance FRT capacity of FSWT and compared the performance of resistive-type fault current limiters (RFCL) and reactor-type fault current limiters (LFCL) of different limiting impedance. The minimum required value of the impedance for maintaining stable operation of FSWT during fault is determined, as well as dynamic stable speed and critical clearing time (CCT). The method has been validated by transient studies in a simple system by PSCAD/EMTDC. Simulation results demonstrate that the enhancement of FRT is related highly with the limiting impedance of FCL. The RFCL has the advantage of choosing limiting impedance and transient oscillate, while the LFCL with minimum required impedance has a better performance on the enhancement of FRT.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131137836","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285705
S. Awadallah, J. Milanović, P. Jarman
The paper investigates the effect of age related failure of power transformers on the identification of most critical transformer sites for system reliability. The end-of-life failure model of power transformers is modified first to integrate loading conditions effect. The adopted Arrhenius-Weibull probability distribution, which represents the effect of thermal stress on the transformer's end-of-life failure, was compared with the commonly used Gaussian probability distribution model. The sensitivity of results to the uncertainty in model parameters is thoroughly assessed, and acceptable level of uncertainty is determined. The results demonstrated the importance of integration of loading conditions into the failure model. The sensitivity analysis revealed that the identification of critical transformer sites is not significantly affected by the uncertainty in the failure model parameters and that approximate ranges of parameters can be used instead of accurate values without significant, if any, loss in accuracy. The case studies were performed on a realistic transmission test system with 154 power transformers.
{"title":"The influence of modelling transformer age related failures on system reliability","authors":"S. Awadallah, J. Milanović, P. Jarman","doi":"10.1109/PESGM.2015.7285705","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285705","url":null,"abstract":"The paper investigates the effect of age related failure of power transformers on the identification of most critical transformer sites for system reliability. The end-of-life failure model of power transformers is modified first to integrate loading conditions effect. The adopted Arrhenius-Weibull probability distribution, which represents the effect of thermal stress on the transformer's end-of-life failure, was compared with the commonly used Gaussian probability distribution model. The sensitivity of results to the uncertainty in model parameters is thoroughly assessed, and acceptable level of uncertainty is determined. The results demonstrated the importance of integration of loading conditions into the failure model. The sensitivity analysis revealed that the identification of critical transformer sites is not significantly affected by the uncertainty in the failure model parameters and that approximate ranges of parameters can be used instead of accurate values without significant, if any, loss in accuracy. The case studies were performed on a realistic transmission test system with 154 power transformers.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131038630","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285753
Yin Lei, Yidan Lu, Yalong Li, Yilu Liu, K. Tomsovic, Fei Wang
Many European countries have taken steps toward a Supergrid in order to transmit large amount of intermittent and remote renewable energy over long distance to load centers. In the US, as the expected increase in renewable generation and electricity demand, similar problem arises. A potential solution is to upgrade the transmission system at a higher voltage by constructing a new overlay grid. This paper will first address basic requirements for such an overlay grid. Potential transmission technologies will also be discussed. A multi-terminal VSC HVDC model is developed in DSATools to implement the overlay grid and a test case on a regional NPCC system will be simulated. Another test system of entire US power grid, with three different interconnections tied together using back-to-back HVDC, is also introduced in this paper. Building an overlay system on top of this test case is ongoing, and will be discussed in future work.
{"title":"A preliminary study of building a transmission overlay for regional U.S. power grid","authors":"Yin Lei, Yidan Lu, Yalong Li, Yilu Liu, K. Tomsovic, Fei Wang","doi":"10.1109/PESGM.2015.7285753","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285753","url":null,"abstract":"Many European countries have taken steps toward a Supergrid in order to transmit large amount of intermittent and remote renewable energy over long distance to load centers. In the US, as the expected increase in renewable generation and electricity demand, similar problem arises. A potential solution is to upgrade the transmission system at a higher voltage by constructing a new overlay grid. This paper will first address basic requirements for such an overlay grid. Potential transmission technologies will also be discussed. A multi-terminal VSC HVDC model is developed in DSATools to implement the overlay grid and a test case on a regional NPCC system will be simulated. Another test system of entire US power grid, with three different interconnections tied together using back-to-back HVDC, is also introduced in this paper. Building an overlay system on top of this test case is ongoing, and will be discussed in future work.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131202827","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285694
K. Malmedal, C. Bates, D. Cain
The heat generated by underground cables has been known to cause the soil around the cables to dry, increasing its thermal resistivity and potentially causing the cables to overheat. The ability of soil to maintain a constant resistivity while being subjected to a heat source is known as its “thermal stability”. A method using the Law of Times has often been recommended to find soil stability. To test whether this method can accurately predict soil thermal stability an experiment was performed that tested the hypothesis inherent in the Law of Times that the diameter of the heat source affects the drying time of the soil surrounding it. This paper reports the results of that experiment and includes the statistical analysis of the data. The experimental evidence resulted in rejecting the Law of Times as an accurate predictor of the drying time of soil around a buried cable.
{"title":"Experimantal evidence rejecting a common method for finding soil thermal stability","authors":"K. Malmedal, C. Bates, D. Cain","doi":"10.1109/PESGM.2015.7285694","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285694","url":null,"abstract":"The heat generated by underground cables has been known to cause the soil around the cables to dry, increasing its thermal resistivity and potentially causing the cables to overheat. The ability of soil to maintain a constant resistivity while being subjected to a heat source is known as its “thermal stability”. A method using the Law of Times has often been recommended to find soil stability. To test whether this method can accurately predict soil thermal stability an experiment was performed that tested the hypothesis inherent in the Law of Times that the diameter of the heat source affects the drying time of the soil surrounding it. This paper reports the results of that experiment and includes the statistical analysis of the data. The experimental evidence resulted in rejecting the Law of Times as an accurate predictor of the drying time of soil around a buried cable.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133053259","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285790
S. Meliopoulos, Renke Huang, E. Polymeneas, G. Cokkinides
The changing face of the electric power system due to new power apparatus, the proliferation of customer owned resources and smart devices creates the possibility of coordinated control of all these resources for the benefit of the power grid and its customers. Coordinated control requires real-time monitoring of models and resources and subsequent model-based analysis, optimization and control. Legacy state estimation is limited to the transmission system only and provides only the bus voltage values at transmission buses. This paper proposes a distributed dynamic state estimation (DDSE) technology that (a) extracts the dynamic real-time model of all components in substations as well as transmission lines, and (b) executes each cycle thus providing the real time model each cycle of the system. The DDSE uses all available measurements in the system, PMU data (GPS-synchronized), SCADA data, smart meter data, etc. The DDSE provides the real time model of the system which is the fundamental building block for all smart grid applications. The representation of the real-time model is object-oriented that allows interoperability among various applications. As an example, the paper discusses the seamless application of the optimal power flow using the real-time model provided by the DDSE.
{"title":"Distributed dynamic state estimation: Fundamental building block for the smart grid","authors":"S. Meliopoulos, Renke Huang, E. Polymeneas, G. Cokkinides","doi":"10.1109/PESGM.2015.7285790","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285790","url":null,"abstract":"The changing face of the electric power system due to new power apparatus, the proliferation of customer owned resources and smart devices creates the possibility of coordinated control of all these resources for the benefit of the power grid and its customers. Coordinated control requires real-time monitoring of models and resources and subsequent model-based analysis, optimization and control. Legacy state estimation is limited to the transmission system only and provides only the bus voltage values at transmission buses. This paper proposes a distributed dynamic state estimation (DDSE) technology that (a) extracts the dynamic real-time model of all components in substations as well as transmission lines, and (b) executes each cycle thus providing the real time model each cycle of the system. The DDSE uses all available measurements in the system, PMU data (GPS-synchronized), SCADA data, smart meter data, etc. The DDSE provides the real time model of the system which is the fundamental building block for all smart grid applications. The representation of the real-time model is object-oriented that allows interoperability among various applications. As an example, the paper discusses the seamless application of the optimal power flow using the real-time model provided by the DDSE.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133439846","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7285970
Radu Ghiga, Qiuwei Wu, Kenneth E. Martin, W. El-Khatib, Lin Cheng, Arne Hejde Nielsen
This paper presents a flexible testing methodology and the dynamic compliance of PMUs as per the new C37.118.1a amendment published in 2014. The test platform consists of test signal generator, a Doble F6150 amplifier, PMUs under test, and a PMU test result analysis kit. The Doble amplifier is used for providing three phase voltage and current injections to the PMUs. Three PMUs from different vendors were tested simultaneously in order to provide a fair comparison of the devices. The new 2014 amendment comes with significant changes over the C37.118.1 - 2011 standard regarding the dynamic tests.
{"title":"Dynamic PMU compliance test under C37.118.1a™-2014","authors":"Radu Ghiga, Qiuwei Wu, Kenneth E. Martin, W. El-Khatib, Lin Cheng, Arne Hejde Nielsen","doi":"10.1109/PESGM.2015.7285970","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285970","url":null,"abstract":"This paper presents a flexible testing methodology and the dynamic compliance of PMUs as per the new C37.118.1a amendment published in 2014. The test platform consists of test signal generator, a Doble F6150 amplifier, PMUs under test, and a PMU test result analysis kit. The Doble amplifier is used for providing three phase voltage and current injections to the PMUs. Three PMUs from different vendors were tested simultaneously in order to provide a fair comparison of the devices. The new 2014 amendment comes with significant changes over the C37.118.1 - 2011 standard regarding the dynamic tests.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132273950","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7286192
M. Donnelly, D. Trudnowski, James Colwell, J. Pierre, L. Dosiek
Real-time monitoring of power-system oscillations is a concern in the operation and control of synchronous power systems. A simple and powerful approach is to use an RMS energy filter. As defined in this paper, an RMS energy filter estimates the total RMS energy of a signal in a defined frequency band. This approach has been implemented in the operation control center at the Bonneville Power Administration for the past year, and it is being implemented in a DC modulation damping control monitoring system. This paper describes RMS energy filter design requirements, approaches, and alternatives. Simulation examples demonstrate the performance.
{"title":"RMS-energy filter design for real-time oscillation detection","authors":"M. Donnelly, D. Trudnowski, James Colwell, J. Pierre, L. Dosiek","doi":"10.1109/PESGM.2015.7286192","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286192","url":null,"abstract":"Real-time monitoring of power-system oscillations is a concern in the operation and control of synchronous power systems. A simple and powerful approach is to use an RMS energy filter. As defined in this paper, an RMS energy filter estimates the total RMS energy of a signal in a defined frequency band. This approach has been implemented in the operation control center at the Bonneville Power Administration for the past year, and it is being implemented in a DC modulation damping control monitoring system. This paper describes RMS energy filter design requirements, approaches, and alternatives. Simulation examples demonstrate the performance.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128854638","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 : 2015-07-26DOI: 10.1109/PESGM.2015.7286460
M. Young, A. Dimitrovski, Zhi Li, Yilu Liu, R. Patterson
A continuously variable series reactor (CVSR) is a novel application of a well-known concept that provides continuous modulation of line reactance by controlling the magnetization in a ferromagnetic core. The target application is power flow control in meshed electric power systems. Modulation of the line impedance occurs by altering the bias of a dc winding to control the magnetization of the ferromagnetic core, thereby varying the reactance of the ac winding. Fault conditions can drive the CVSR outside of the control point in sub-cycle time and could affect distance protection along the controlled line. This study seeks to quantify such impacts using PSCAD™ simulations of a CVSR under fault conditions with CCVTs providing the line potential measurements. Impacts are observed through playback of the resulting waveforms into a distance relay. The results show that the interaction of the CVSR with CCVTs has minimal effect on distance protection reach.
{"title":"Continously variable series reactor: Impacts on distance protection using CCVTs","authors":"M. Young, A. Dimitrovski, Zhi Li, Yilu Liu, R. Patterson","doi":"10.1109/PESGM.2015.7286460","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286460","url":null,"abstract":"A continuously variable series reactor (CVSR) is a novel application of a well-known concept that provides continuous modulation of line reactance by controlling the magnetization in a ferromagnetic core. The target application is power flow control in meshed electric power systems. Modulation of the line impedance occurs by altering the bias of a dc winding to control the magnetization of the ferromagnetic core, thereby varying the reactance of the ac winding. Fault conditions can drive the CVSR outside of the control point in sub-cycle time and could affect distance protection along the controlled line. This study seeks to quantify such impacts using PSCAD™ simulations of a CVSR under fault conditions with CCVTs providing the line potential measurements. Impacts are observed through playback of the resulting waveforms into a distance relay. The results show that the interaction of the CVSR with CCVTs has minimal effect on distance protection reach.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127800095","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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