This paper proposes a real-time data compression and adapted protocol technique for wide-area measurement systems (WAMS). The compression algorithm combines exception compression (EC) with swing door trending (SDT) compression. The compression logic is designed to perform this algorithm in real time. Selection of compression parameters and data reconstruction are presented. An adapted protocol is introduced by improving the format of data frames defined by IEEE standard C37.118 for compressed data packets. The proposed compression technique and protocol were applied to the phasor measurement units (PMUs) of a hydropower plant in Guizhou Power Grid in Southwest China. A low-frequency oscillation incident was recorded by this technique. The raw, compressed and reconstructed data were analyzed to verify the compression and determine the accuracy of the proposed technique. Also, the wavelet-based data compression, the standalone EC and SDT are compared with the proposed compression technique. Our results demonstrated that this compression can reach the compression ratios in the range of 6 to 11. Also, this compression and adapted protocol technique can reduce the size of data packets by approximately 75% with high accuracy in both dynamic and steady states.
{"title":"Application of a real-time data compression and adapted protocol technique for WAMS","authors":"Fang Zhang, Lin Cheng, Xiong Li, Yuanzhan Sun, Wenzhong Gao, Weixing Zhao","doi":"10.1109/PESGM.2015.7286366","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286366","url":null,"abstract":"This paper proposes a real-time data compression and adapted protocol technique for wide-area measurement systems (WAMS). The compression algorithm combines exception compression (EC) with swing door trending (SDT) compression. The compression logic is designed to perform this algorithm in real time. Selection of compression parameters and data reconstruction are presented. An adapted protocol is introduced by improving the format of data frames defined by IEEE standard C37.118 for compressed data packets. The proposed compression technique and protocol were applied to the phasor measurement units (PMUs) of a hydropower plant in Guizhou Power Grid in Southwest China. A low-frequency oscillation incident was recorded by this technique. The raw, compressed and reconstructed data were analyzed to verify the compression and determine the accuracy of the proposed technique. Also, the wavelet-based data compression, the standalone EC and SDT are compared with the proposed compression technique. Our results demonstrated that this compression can reach the compression ratios in the range of 6 to 11. Also, this compression and adapted protocol technique can reduce the size of data packets by approximately 75% with high accuracy in both dynamic and steady states.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"3 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":"129566403","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.2015.7285910
Z. Li, G. Zou, Bingbing Tong, Houlei Gao, Q. Feng
The traveling wave protection performance of traditional DC transmission line can be influenced by fault conditions, so this paper proposes a traveling wave based directional pilot protection method. Analysis shows, for an internal DC line fault, that the forward traveling wave is less than the backward traveling wave at two ends of the proposed line within a short time of post-fault; but in the case of an external fault, the forward traveling wave is greater than the backward one at one end of the line while the forward traveling wave is less than the backward one at the opposite end. According to this characteristic difference, an integral criterion identifying fault direction is constructed here. By comparing the identification results of fault direction at both ends of the line, the internal fault can be distinguished from the external fault. For bipolar HVDC system, the faulted line can be determined according to the polarity difference between the aerial mode component and the zero mode component of the backward traveling wave. This paper builds a UHVDC line model, and the simulation results verify the validity of the proposed method.
{"title":"Novel traveling wave protection method for high voltage DC transmission line","authors":"Z. Li, G. Zou, Bingbing Tong, Houlei Gao, Q. Feng","doi":"10.1109/PESGM.2015.7285910","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285910","url":null,"abstract":"The traveling wave protection performance of traditional DC transmission line can be influenced by fault conditions, so this paper proposes a traveling wave based directional pilot protection method. Analysis shows, for an internal DC line fault, that the forward traveling wave is less than the backward traveling wave at two ends of the proposed line within a short time of post-fault; but in the case of an external fault, the forward traveling wave is greater than the backward one at one end of the line while the forward traveling wave is less than the backward one at the opposite end. According to this characteristic difference, an integral criterion identifying fault direction is constructed here. By comparing the identification results of fault direction at both ends of the line, the internal fault can be distinguished from the external fault. For bipolar HVDC system, the faulted line can be determined according to the polarity difference between the aerial mode component and the zero mode component of the backward traveling wave. This paper builds a UHVDC line model, and the simulation results verify the validity of the proposed method.","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":"129684994","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.2015.7286123
P. Mitra, Jonathan Hanning, Jonas Kohlstrom, T. Larsson, J. Danielsson
The overall system behavior of a three-terminal DC grid with symmetric monopole configuration is the focus of this paper. The modeling of the DC grid test system which includes converter stations, hybrid DC breakers, cables, etc. is carried out in real-time digital simulator (RTDS) platform. For control and protection, ABB's MACH system is used. Some important system aspects of DC grid, e.g. AC fault-ride-through, clearing of DC faults through hybrid DC breakers, post-fault re-dispatch of power through master control and elimination of DC voltage unbalance are demonstrated in this paper through real-time hardware-in-the-loop simulations.
{"title":"DC grid system behavior: A real-time case study","authors":"P. Mitra, Jonathan Hanning, Jonas Kohlstrom, T. Larsson, J. Danielsson","doi":"10.1109/PESGM.2015.7286123","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286123","url":null,"abstract":"The overall system behavior of a three-terminal DC grid with symmetric monopole configuration is the focus of this paper. The modeling of the DC grid test system which includes converter stations, hybrid DC breakers, cables, etc. is carried out in real-time digital simulator (RTDS) platform. For control and protection, ABB's MACH system is used. Some important system aspects of DC grid, e.g. AC fault-ride-through, clearing of DC faults through hybrid DC breakers, post-fault re-dispatch of power through master control and elimination of DC voltage unbalance are demonstrated in this paper through real-time hardware-in-the-loop simulations.","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":"129959337","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.2015.7285686
Yu Jiang, Xingying Chen, Kun Yu, Ying-chen Liao
Power systems with high wind power experience increased variability and uncertainty. Therefore accurate forecast technique is essential to cope with the uncertainty in day-ahead electricity market. Statistical forecast model is considered as a powerful technique for wind-power forecast, however, the forecast accuracy significantly drops as the forecast horizon grows. Focusing on wind speed persistence, a hybrid multi-step-ahead (HMS) method is proposed, which composed of direct multi-step-ahead prediction (DMS) approach and indirect multi-step-ahead prediction (IMS) approach in time-series forecasting. To validate the effectiveness of the proposed method, one-month period of real data, which is collected from five operating wind farms in the east coast of China, is used for test. The persistence model (PM) is used as a benchmark with the new forecast method. Test results show that the proposed method is accurate and effective.
{"title":"Combined approach for short-term wind power prediction: A case study of the east coast of China","authors":"Yu Jiang, Xingying Chen, Kun Yu, Ying-chen Liao","doi":"10.1109/PESGM.2015.7285686","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285686","url":null,"abstract":"Power systems with high wind power experience increased variability and uncertainty. Therefore accurate forecast technique is essential to cope with the uncertainty in day-ahead electricity market. Statistical forecast model is considered as a powerful technique for wind-power forecast, however, the forecast accuracy significantly drops as the forecast horizon grows. Focusing on wind speed persistence, a hybrid multi-step-ahead (HMS) method is proposed, which composed of direct multi-step-ahead prediction (DMS) approach and indirect multi-step-ahead prediction (IMS) approach in time-series forecasting. To validate the effectiveness of the proposed method, one-month period of real data, which is collected from five operating wind farms in the east coast of China, is used for test. The persistence model (PM) is used as a benchmark with the new forecast method. Test results show that the proposed method is accurate and effective.","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":"128446743","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.2015.7286022
Yunhe Hou
Summary form only given. This panel discussion addresses two topics. The first one concerns the functionality of power system restoration tool entitled “System Restoration Navigator (SRN)” supported by EPRI. The SRN is based on the theory of Generic Restoration Milestones (GRMs). The functions of this prototype include: GUIs, strategy generation engine and security checking interface. By interactive GUIs, constraints and combinations of GRMs can be specified by users. Each GRM will be accomplished by algorithms involved in strategy generation engine, and a restoration strategy option can be customized by users. Through the power flow checking interface, a restoration strategy option can be checked by users. The second one addresses the restoration method and application in China, especially in China Southern Power Grid Co. Ltd.(CSG). CSG initialized a restoration project entitled “Self-healing power grid construction with fast cut back units”. This project introduced the fast cut back units to CSG as blackstart resources. The associated restoration methods and tools were developed. Based on the comprehensive study of fast cut back units, this project covered the generating units' design, system planning and restoration strategy development. The latest advancement of this project will be introduced in this discussion.
{"title":"Restoration methods and applications in China and the development of EPRI's restoration tool","authors":"Yunhe Hou","doi":"10.1109/PESGM.2015.7286022","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286022","url":null,"abstract":"Summary form only given. This panel discussion addresses two topics. The first one concerns the functionality of power system restoration tool entitled “System Restoration Navigator (SRN)” supported by EPRI. The SRN is based on the theory of Generic Restoration Milestones (GRMs). The functions of this prototype include: GUIs, strategy generation engine and security checking interface. By interactive GUIs, constraints and combinations of GRMs can be specified by users. Each GRM will be accomplished by algorithms involved in strategy generation engine, and a restoration strategy option can be customized by users. Through the power flow checking interface, a restoration strategy option can be checked by users. The second one addresses the restoration method and application in China, especially in China Southern Power Grid Co. Ltd.(CSG). CSG initialized a restoration project entitled “Self-healing power grid construction with fast cut back units”. This project introduced the fast cut back units to CSG as blackstart resources. The associated restoration methods and tools were developed. Based on the comprehensive study of fast cut back units, this project covered the generating units' design, system planning and restoration strategy development. The latest advancement of this project will be introduced in this discussion.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"49 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":"128229957","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.2015.7286270
Camille Pache, J. Maeght, Baptiste Seguinot, A. Zani, S. Lumbreras, A. Ramos, Sergei Agapoff, L. Warland, L. Rouco, P. Panciatici
This paper presents a new methodology for long-term transmission planning over large systems. The developed approach aims at finding the optimal design of a large grid including its modular development plan over a long time horizon. Advanced optimization and simulation methods have been investigated to tackle this very large and complex problem, which includes highly combinatorial aspects and stochastic behaviours of system components, while ensuring some control over the system. Some tools have been implemented and tested on a case study based on the French and Spanish systems. The preliminary results of this study give an estimation of the resources that would be needed for a real study over a system of the size of the whole pan-European network for the period 2020 to 2050.
{"title":"Enhanced pan-European transmission planning methodology","authors":"Camille Pache, J. Maeght, Baptiste Seguinot, A. Zani, S. Lumbreras, A. Ramos, Sergei Agapoff, L. Warland, L. Rouco, P. Panciatici","doi":"10.1109/PESGM.2015.7286270","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286270","url":null,"abstract":"This paper presents a new methodology for long-term transmission planning over large systems. The developed approach aims at finding the optimal design of a large grid including its modular development plan over a long time horizon. Advanced optimization and simulation methods have been investigated to tackle this very large and complex problem, which includes highly combinatorial aspects and stochastic behaviours of system components, while ensuring some control over the system. Some tools have been implemented and tested on a case study based on the French and Spanish systems. The preliminary results of this study give an estimation of the resources that would be needed for a real study over a system of the size of the whole pan-European network for the period 2020 to 2050.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"3 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":"128235722","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.2015.7286330
N. Díaz, Dan Wu, T. Dragičević, J. Vasquez, J. Guerrero
In this paper, a decentralized strategy based on fuzzy logic is proposed for balancing the state of charge of the energy storage units for distributed PV-based active generators. The proposed method, weights the action of conventional droop control loops for privileging the charge of the energy storage unit with the smallest state of charge or force a faster discharge of the energy storage system with the biggest state of charge. The units are self-controlled by using local variables, hence, the microgrid can operate without relying on communication systems. The proposed strategy is completely expandable and can be applied to a several number of power generators interconnected in a microgrid. Frequency and voltage bus signaling is used in order to coordinate the control operation mode between units. Simulation results in a low-voltage, three-phase, islanded AC microgrid show the feasibility of the proposed method and its applicability even for several active generators.
{"title":"Stored energy balance for distributed PV-based active generators in an AC microgrid","authors":"N. Díaz, Dan Wu, T. Dragičević, J. Vasquez, J. Guerrero","doi":"10.1109/PESGM.2015.7286330","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286330","url":null,"abstract":"In this paper, a decentralized strategy based on fuzzy logic is proposed for balancing the state of charge of the energy storage units for distributed PV-based active generators. The proposed method, weights the action of conventional droop control loops for privileging the charge of the energy storage unit with the smallest state of charge or force a faster discharge of the energy storage system with the biggest state of charge. The units are self-controlled by using local variables, hence, the microgrid can operate without relying on communication systems. The proposed strategy is completely expandable and can be applied to a several number of power generators interconnected in a microgrid. Frequency and voltage bus signaling is used in order to coordinate the control operation mode between units. Simulation results in a low-voltage, three-phase, islanded AC microgrid show the feasibility of the proposed method and its applicability even for several active generators.","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":"128239056","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.2015.7285845
Zhao Luo, Zhihe Wang, W. Gu, Yiyuan Tang, Chao Xu
A two-stage energy management strategy for CCHP microgrid is proposed in this paper. The first stage, named day-ahead scheduling stage (DASS), is an economic dispatch model to minimize the operating cost. This stage provides the operation plans including commitment or output power of each unit, which is solved by a revised particle swarm optimization. The second stage, called real-time adjusting stage (RTAS), deals with the fluctuations of power by adjusting the output power of the central air conditioning considering housing characteristics, and the batteries and other controllable units based on heuristic rules. RTAS is utilized to maintain the exchange power between the main grids and the CCHP microgrid constant. A typical CCHP microgrid is simulated to demonstrate the performance and effectiveness of the proposed energy management strategy.
{"title":"A Two-Stage Energy Management Strategy for CCHP Microgrid considering house characteristics","authors":"Zhao Luo, Zhihe Wang, W. Gu, Yiyuan Tang, Chao Xu","doi":"10.1109/PESGM.2015.7285845","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285845","url":null,"abstract":"A two-stage energy management strategy for CCHP microgrid is proposed in this paper. The first stage, named day-ahead scheduling stage (DASS), is an economic dispatch model to minimize the operating cost. This stage provides the operation plans including commitment or output power of each unit, which is solved by a revised particle swarm optimization. The second stage, called real-time adjusting stage (RTAS), deals with the fluctuations of power by adjusting the output power of the central air conditioning considering housing characteristics, and the batteries and other controllable units based on heuristic rules. RTAS is utilized to maintain the exchange power between the main grids and the CCHP microgrid constant. A typical CCHP microgrid is simulated to demonstrate the performance and effectiveness of the proposed energy management strategy.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"70 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":"129151824","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.2015.7286510
A. Dubey, S. Santoso, A. Maitra
A widespread integration of residential photovoltaics (PVs) into the distribution system may potentially disrupt the nominal circuit operating conditions and result in power quality issues. The objective of this paper is to investigate the impacts of residential PVs on distribution voltages. A stochastic analysis framework is used to simulate possible PV deployment scenarios. The PV integration limit, termed hosting capacity, is calculated with respect to bus overvoltages, voltage deviations, and voltage unbalance. A thorough interpretation of PV hosting results is presented, and several factors potentially affecting the circuit's voltage quality are identified. Additionally, the impacts of increasing the circuit's minimum load on the PV hosting capacity are evaluated. Finally, the voltage quality impacts of PV locations are identified, and, based on the results, useful and generic recommendations for PV integration are presented.
{"title":"Understanding photovoltaic hosting capacity of distribution circuits","authors":"A. Dubey, S. Santoso, A. Maitra","doi":"10.1109/PESGM.2015.7286510","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7286510","url":null,"abstract":"A widespread integration of residential photovoltaics (PVs) into the distribution system may potentially disrupt the nominal circuit operating conditions and result in power quality issues. The objective of this paper is to investigate the impacts of residential PVs on distribution voltages. A stochastic analysis framework is used to simulate possible PV deployment scenarios. The PV integration limit, termed hosting capacity, is calculated with respect to bus overvoltages, voltage deviations, and voltage unbalance. A thorough interpretation of PV hosting results is presented, and several factors potentially affecting the circuit's voltage quality are identified. Additionally, the impacts of increasing the circuit's minimum load on the PV hosting capacity are evaluated. Finally, the voltage quality impacts of PV locations are identified, and, based on the results, useful and generic recommendations for PV integration are presented.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"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":"129281288","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}
Large-scale integration of distributed generations (DGs) may degrade the stability of the power distribution system. This paper proposes a control method to improve the system stability of grid-connected inverter-based distributed generation (DG) systems. The proposed method is to add a stabilizer inside the inverter interface controller of a DG unit to supply auxiliary current reference signal for the inverter current controller and thus improve the stability performance. The input signal of the stabilizer is the grid frequency. A series of small-signal analysis and time-domain simulations have been conducted to verify the effectiveness of the proposed stabilizer. The oscillations of the DG system are greatly damped with the stabilizer.
{"title":"A stability enhancement method for inverter-based distributed generation systems","authors":"Jian Xiong, Shichao Liu, Xiaoyu Wang, Shouzhen Zhu, Jinghong Zheng, Kun Meng","doi":"10.1109/PESGM.2015.7285737","DOIUrl":"https://doi.org/10.1109/PESGM.2015.7285737","url":null,"abstract":"Large-scale integration of distributed generations (DGs) may degrade the stability of the power distribution system. This paper proposes a control method to improve the system stability of grid-connected inverter-based distributed generation (DG) systems. The proposed method is to add a stabilizer inside the inverter interface controller of a DG unit to supply auxiliary current reference signal for the inverter current controller and thus improve the stability performance. The input signal of the stabilizer is the grid frequency. A series of small-signal analysis and time-domain simulations have been conducted to verify the effectiveness of the proposed stabilizer. The oscillations of the DG system are greatly damped with the stabilizer.","PeriodicalId":423639,"journal":{"name":"2015 IEEE Power & Energy Society General Meeting","volume":"115 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":"129626338","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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