State variables change of Photovoltaic alone with its control variables is studied on the basis of photovoltaic generation system research. A model of photovoltaic external characteristic model is established as well. The model included its active power output as well as reactive power output. The power of each photovoltaic can be variable in a wide range based on the local temperature, illumination intensity and weather conditions when these DGs are connected to the grid. As a result., the power flow of distribution network may be changed and it will also lead to a higher network losses and fluctuated voltages. A novel model for analyzing active power change of photovoltaic is established., besides., the feasibility and influencing factors of reactive power of photovoltaic is demonstrated. In the end, the corresponding method of dynamic power prediction of photovoltaic is proposed to get the optimal active power output and reactive power output. The results of an example show that the efficiency of photovoltaic and the stability of power system can be largely improved by using the method.
{"title":"The Research of External Characteristic Model Based on Photovoltaic System","authors":"Jingpeng Wang, Xin Wang, Xiaowei Yang, Shunzhi. Yu","doi":"10.1109/CICED.2018.8592072","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592072","url":null,"abstract":"State variables change of Photovoltaic alone with its control variables is studied on the basis of photovoltaic generation system research. A model of photovoltaic external characteristic model is established as well. The model included its active power output as well as reactive power output. The power of each photovoltaic can be variable in a wide range based on the local temperature, illumination intensity and weather conditions when these DGs are connected to the grid. As a result., the power flow of distribution network may be changed and it will also lead to a higher network losses and fluctuated voltages. A novel model for analyzing active power change of photovoltaic is established., besides., the feasibility and influencing factors of reactive power of photovoltaic is demonstrated. In the end, the corresponding method of dynamic power prediction of photovoltaic is proposed to get the optimal active power output and reactive power output. The results of an example show that the efficiency of photovoltaic and the stability of power system can be largely improved by using the method.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134195682","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592479
Xue Song, Hu Yuan, Zhang Xiao-xuan, Li Jing, Ma Li
The distribution network has been a weak link in China's power industry for a long time, there is an urgent need to optimize distribution network management based on benchmarking world's first class level. Characteristics of advanced distribution network management in the world was systematically researched in this paper, the connotation of world-class distribution network management was summarized, and evaluation index system was proposed. Drawing on the international comparison of horizontal practices, the evaluation was carried out by method of weight and standard score. Finally, through an example, this paper diagnosed the gap between first tier cities in China and world's first-class distribution network management, and put forward improvement strategies.
{"title":"Evaluation Model for World-Class Distribution Network Management","authors":"Xue Song, Hu Yuan, Zhang Xiao-xuan, Li Jing, Ma Li","doi":"10.1109/CICED.2018.8592479","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592479","url":null,"abstract":"The distribution network has been a weak link in China's power industry for a long time, there is an urgent need to optimize distribution network management based on benchmarking world's first class level. Characteristics of advanced distribution network management in the world was systematically researched in this paper, the connotation of world-class distribution network management was summarized, and evaluation index system was proposed. Drawing on the international comparison of horizontal practices, the evaluation was carried out by method of weight and standard score. Finally, through an example, this paper diagnosed the gap between first tier cities in China and world's first-class distribution network management, and put forward improvement strategies.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134201092","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592538
Jian Ling, Hong Ji, Chunhua Yu, Sicheng Wang, D. Yu, Sufan Jiang
Sub-synchronous oscillation (SSO) is a specific dynamic behavior due to the coupling of mechanic and electrical parts of power system, which is a severe stability problem. Unified Power Flow Controller (UPFC), as the most advanced FACTS device, can restrain the system oscillation effectively through proper design. In this paper, UPFC's ability to damp SSO was studied first. An UPFC damping controller design method based on the modal control method is then proposed. Analysis of examples show that the method proposed in this paper can effectively suppress the sub-synchronous oscillation of power system and improve the stability of the system.
{"title":"Design of UPFC Sub-Synchronous Oscillation Damping Controller Based on Modal Control","authors":"Jian Ling, Hong Ji, Chunhua Yu, Sicheng Wang, D. Yu, Sufan Jiang","doi":"10.1109/CICED.2018.8592538","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592538","url":null,"abstract":"Sub-synchronous oscillation (SSO) is a specific dynamic behavior due to the coupling of mechanic and electrical parts of power system, which is a severe stability problem. Unified Power Flow Controller (UPFC), as the most advanced FACTS device, can restrain the system oscillation effectively through proper design. In this paper, UPFC's ability to damp SSO was studied first. An UPFC damping controller design method based on the modal control method is then proposed. Analysis of examples show that the method proposed in this paper can effectively suppress the sub-synchronous oscillation of power system and improve the stability of the system.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134450646","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592344
Huang He, Wu Jie, Wen Beibei, Wu Qian
With the deepening of the electric power system reform, electricity market has attracted attentions from both academic and industrial societies. In this paper, a bilateral game model with incomplete information between the electricity generation and selling enterprises is established, which considers the direct electricity purchase prices and amount as the strategy sets of the both sides. In order to forecast the direct electricity purchase prices, the factor of generation costs is introduced, which uses the co-integration theory to construct the relation between the direct electricity purchase prices and the generation costs. Furthermore, to forecast the direct electricity purchase amount, the similar days method is adopted to ensure the information sharing demand between both sides. Finally, the equilibrium solution of the bilateral game is obtained by using Nash equilibrium, and the model has been proved by simulation.
{"title":"Research on Bilateral Games Between Electric Generations and Sale Sides With Incomplete Information","authors":"Huang He, Wu Jie, Wen Beibei, Wu Qian","doi":"10.1109/CICED.2018.8592344","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592344","url":null,"abstract":"With the deepening of the electric power system reform, electricity market has attracted attentions from both academic and industrial societies. In this paper, a bilateral game model with incomplete information between the electricity generation and selling enterprises is established, which considers the direct electricity purchase prices and amount as the strategy sets of the both sides. In order to forecast the direct electricity purchase prices, the factor of generation costs is introduced, which uses the co-integration theory to construct the relation between the direct electricity purchase prices and the generation costs. Furthermore, to forecast the direct electricity purchase amount, the similar days method is adopted to ensure the information sharing demand between both sides. Finally, the equilibrium solution of the bilateral game is obtained by using Nash equilibrium, and the model has been proved by simulation.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131215560","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592496
Yao Chuang, Duan Minghui, H. Xin, Xi Xiaoguang, Zhang Xin, Wen Qinfeng, Zhu Xu-liang, Zhu Mingzheng
In order to ensure the continuous and stable operation of power system, the infrared detection technology is introduced. The technology uses infrared thermal imager and other temperature measuring instruments to evaluate the operation state of electrical equipment based on the thermal distribution of equipment. It is one of the most important methods of energized test at present. Infrared detection principle, the application of infrared thermal imager in power system and the influence factors of infrared detection are introduced. Combined with calibration situation of infrared thermal imager in the past two years in a certain area, the necessity of infrared thermal imager calibration is analyzed, to provide reference for the correct use and maintenance of infrared thermal imager.
{"title":"Review of Temperature Measurement Technology With Infrared Thermal Imager","authors":"Yao Chuang, Duan Minghui, H. Xin, Xi Xiaoguang, Zhang Xin, Wen Qinfeng, Zhu Xu-liang, Zhu Mingzheng","doi":"10.1109/CICED.2018.8592496","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592496","url":null,"abstract":"In order to ensure the continuous and stable operation of power system, the infrared detection technology is introduced. The technology uses infrared thermal imager and other temperature measuring instruments to evaluate the operation state of electrical equipment based on the thermal distribution of equipment. It is one of the most important methods of energized test at present. Infrared detection principle, the application of infrared thermal imager in power system and the influence factors of infrared detection are introduced. Combined with calibration situation of infrared thermal imager in the past two years in a certain area, the necessity of infrared thermal imager calibration is analyzed, to provide reference for the correct use and maintenance of infrared thermal imager.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131187450","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592371
Xi Qi, Xiangjun Li, Shan He
To take full advantage of the complementary nature of multi-type energy storage and maximally increase the capability of tracking the scheduled PV power output, a charging-discharging control strategy combining Fuzzy-Model Predictive Control (FMPC) and Variational Mode Decomposition (VMD) for a energy storage system (ESS) is proposed. Firstly, the total energy storage load can be obtained based on FMPC algorithm. Then, power allocation between multi-type power storage is achieved with VMD. A simulation analysis, taking a typical PV output as an actual data sample, showed that the proposed FMPC-VMD control method for the multi-type BESS is uniquely flexible and adaptable in achieving the control effect of improving the capability of tracking the scheduled PV power output.
{"title":"FMPC-VMD Based Control Strategy for Tracking Generation Plans of Multi-type Energy Storage System","authors":"Xi Qi, Xiangjun Li, Shan He","doi":"10.1109/CICED.2018.8592371","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592371","url":null,"abstract":"To take full advantage of the complementary nature of multi-type energy storage and maximally increase the capability of tracking the scheduled PV power output, a charging-discharging control strategy combining Fuzzy-Model Predictive Control (FMPC) and Variational Mode Decomposition (VMD) for a energy storage system (ESS) is proposed. Firstly, the total energy storage load can be obtained based on FMPC algorithm. Then, power allocation between multi-type power storage is achieved with VMD. A simulation analysis, taking a typical PV output as an actual data sample, showed that the proposed FMPC-VMD control method for the multi-type BESS is uniquely flexible and adaptable in achieving the control effect of improving the capability of tracking the scheduled PV power output.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132930319","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592066
X. Luo, P. Peng, Y. Shao, J. Li, G. Yu
The general concept of smart load (SL) was originally introduced to provide practical implementation in grid power─frequency support applications. In this paper, a specific feature of SL which is composed of a SL controller and a linear load is introduced, after that, a comprehensive discussion on the application of SL for voltage stabilization and energy storage capacity reduction in an isolated microgrid is presented. The key component of this novel SL is the controller which is operated as a series reactive power compensator (RPC), unlike the traditional reactive power compensation technologies, it offers not only reactive power compensation but also active power variation in the linear load. Results validate the effectiveness of adopting this SL for a isolated microgrid with renewable energy source and energy storage system.
{"title":"Reduction of Energy Storage Capacity in an Isolated Microgrid by Using Smart Load","authors":"X. Luo, P. Peng, Y. Shao, J. Li, G. Yu","doi":"10.1109/CICED.2018.8592066","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592066","url":null,"abstract":"The general concept of smart load (SL) was originally introduced to provide practical implementation in grid power─frequency support applications. In this paper, a specific feature of SL which is composed of a SL controller and a linear load is introduced, after that, a comprehensive discussion on the application of SL for voltage stabilization and energy storage capacity reduction in an isolated microgrid is presented. The key component of this novel SL is the controller which is operated as a series reactive power compensator (RPC), unlike the traditional reactive power compensation technologies, it offers not only reactive power compensation but also active power variation in the linear load. Results validate the effectiveness of adopting this SL for a isolated microgrid with renewable energy source and energy storage system.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133299264","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592273
Hua Li, Ruizheng Gu
Aiming at the problem that the power supply quality of the microgrid needs to be improved and the large impact of grid connection, a new type of virtual synchronous generator (VSG) control strategy is proposed to control the microgrid inverter. The VSG model based on stator voltage model and rotor motion model is established by deformation and vector decomposition of the hidden-pole synchronous generator second-order equation. The virtual frequency regulation module and the virtual voltage regulation module are also obtained by improving the principle of generator frequency and voltage regulation, and the grid-connected control module with voltage phase angle double feedback is also designed. By constructing relevant models, compare the performance of voltage, frequency and power before and after grid connection. The simulation results show that the VSG control strategy can better adjust load changes under the premise of less impact on the grid, and verify the effectiveness of the proposed control strategy.
{"title":"Research on Grid-connected Control and Simulation of Microgrid Inverter Based on VSG","authors":"Hua Li, Ruizheng Gu","doi":"10.1109/CICED.2018.8592273","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592273","url":null,"abstract":"Aiming at the problem that the power supply quality of the microgrid needs to be improved and the large impact of grid connection, a new type of virtual synchronous generator (VSG) control strategy is proposed to control the microgrid inverter. The VSG model based on stator voltage model and rotor motion model is established by deformation and vector decomposition of the hidden-pole synchronous generator second-order equation. The virtual frequency regulation module and the virtual voltage regulation module are also obtained by improving the principle of generator frequency and voltage regulation, and the grid-connected control module with voltage phase angle double feedback is also designed. By constructing relevant models, compare the performance of voltage, frequency and power before and after grid connection. The simulation results show that the VSG control strategy can better adjust load changes under the premise of less impact on the grid, and verify the effectiveness of the proposed control strategy.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131687287","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592129
Wang Dexiang, Lin Yitong, S. Yi, Fei Yarao, Z. Ziyi, Zhu Chunlei, Kou Zhiwen
The design of controller is the important part for static synchronous compensator (D-STATCOM). However, due to the strong decouple and non-linear characteristic of D-STATCOM, the traditional controller cannot meet the demand of the power system. This paper introduces linear auto disturbance rejection controller(LADRC) for D-STATCOM based on its mathematics model and design first-order LADRC for it; and then classical control theory is used to analyze convergence of two-order linear extended state observer (LESO) in frequency domain; at last, the simulation model is made for it, verification shows that ADRC is superior to conventional proportional - integral - derivative controller, it has good tracking performance and immunity characteristics, this paper verify the feasibility of LADRC controller and its controller.
{"title":"Design of the Controller and Stability Analysis of Distributed Static Synchronous Compensator Based on LADRC","authors":"Wang Dexiang, Lin Yitong, S. Yi, Fei Yarao, Z. Ziyi, Zhu Chunlei, Kou Zhiwen","doi":"10.1109/CICED.2018.8592129","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592129","url":null,"abstract":"The design of controller is the important part for static synchronous compensator (D-STATCOM). However, due to the strong decouple and non-linear characteristic of D-STATCOM, the traditional controller cannot meet the demand of the power system. This paper introduces linear auto disturbance rejection controller(LADRC) for D-STATCOM based on its mathematics model and design first-order LADRC for it; and then classical control theory is used to analyze convergence of two-order linear extended state observer (LESO) in frequency domain; at last, the simulation model is made for it, verification shows that ADRC is superior to conventional proportional - integral - derivative controller, it has good tracking performance and immunity characteristics, this paper verify the feasibility of LADRC controller and its controller.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127236086","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 : 2018-09-01DOI: 10.1109/CICED.2018.8592345
Xueying Wang, Tao Zheng
Multiple converters and negative impedance characteristics of constant power loads of DC microgrid will lead system instability. First, the equivalent input and output impedance of the system have been obtained. Based on the Nyquist stability criterion, a passivity based parallel impedance method has been proposed to determine the system voltage stability. The proposed method can transform the stability problem into the system passivity problem and its performance was compared with the traditional impedance ratio criterion. Secondly, in order to improve the stability of DC microgrid, an active damping control method based on the feed current of the DC converter is proposed. The design principle of the active damping parameters is given. PSCAD simulation results verify the effectiveness of the proposed method.
{"title":"A Parallel Impedance Based Criteria and Active Damping Control for DC Microgrid Stability","authors":"Xueying Wang, Tao Zheng","doi":"10.1109/CICED.2018.8592345","DOIUrl":"https://doi.org/10.1109/CICED.2018.8592345","url":null,"abstract":"Multiple converters and negative impedance characteristics of constant power loads of DC microgrid will lead system instability. First, the equivalent input and output impedance of the system have been obtained. Based on the Nyquist stability criterion, a passivity based parallel impedance method has been proposed to determine the system voltage stability. The proposed method can transform the stability problem into the system passivity problem and its performance was compared with the traditional impedance ratio criterion. Secondly, in order to improve the stability of DC microgrid, an active damping control method based on the feed current of the DC converter is proposed. The design principle of the active damping parameters is given. PSCAD simulation results verify the effectiveness of the proposed method.","PeriodicalId":142885,"journal":{"name":"2018 China International Conference on Electricity Distribution (CICED)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115231117","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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