2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)最新文献

Three-port impedance model and validation of VSCs for stability analysis 三端口阻抗模型及VSCs稳定性分析验证

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 2022-03-01 DOI: 10.1049/icp.2021.2578

H. Zong, C. Zhang, X. Cai, M. Molinas

{"title":"Three-port impedance model and validation of VSCs for stability analysis","authors":"H. Zong, C. Zhang, X. Cai, M. Molinas","doi":"10.1049/icp.2021.2578","DOIUrl":"https://doi.org/10.1049/icp.2021.2578","url":null,"abstract":"Modern power system is undergoing a paradigm shift from the synchronous generators-based system to the power electronics converters-dominated system. With the high penetration of converters, serious stability problems are provoked, especially the wideband oscillations (e.g., sub-synchronous oscillations, harmonic oscillations, etc). Various studies have been conducted in this respect, while most of them separate the ac-side stability with the dc-side stability. However, for the stability analysis of the hybrid AC/DC grid, it is necessary to consider the converter's ac-side and dc-side, simultaneously. In this paper, the stability analysis of voltage source converters (VSCs) considering both ac and dc dynamics is carried out. At first, the threeport AC/DC admittance model of VSCs is established, and the corresponding measurement method from simulations is presented to validate its accuracy. Secondly, based on such three-port model, two stability analysis methods are presented: the one is based on the system open-loop model, where the stability can be judged via the Generalized Nyquist Criterion (GNC); the other one is based on the system closed-loop model, whose stability can be predicted through the pole-zero calculation. At last, a test AC/DC system is built in MATLAB/Simulink, by which the effectiveness of the three-port model-based stability analysis is validated.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126312605","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}

引用次数: 3

Transient synchronization stability analysis of wind farms with MMC-HVDC integration under offshore AC grid fault 海上交流电网故障下MMC-HVDC一体化风电场暂态同步稳定性分析

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 2021-10-25 DOI: 10.1049/icp.2021.2585

Yu Zhang, Chen Zhang, Renxin Yang, J. Lyu, Li Liu, X. Cai

引用次数: 1

Research on MMC de-icing system capable of power grid interconnection 电网互联MMC除冰系统研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2534

X. Yan, Z. Yuebin, B. Guobang, C. Wanyu, Y. Liuqing, Y. Wenyong, L. Qiansu, Z. Ronghua, X. Shukai, F. Chuang

{"title":"Research on MMC de-icing system capable of power grid interconnection","authors":"X. Yan, Z. Yuebin, B. Guobang, C. Wanyu, Y. Liuqing, Y. Wenyong, L. Qiansu, Z. Ronghua, X. Shukai, F. Chuang","doi":"10.1049/icp.2021.2534","DOIUrl":"https://doi.org/10.1049/icp.2021.2534","url":null,"abstract":"Voltage sourced converter (VSC) de-icing device has been gradually applied because of its advantages, such as no requirements on by-pass transformer, no harmonic output on AC side, and small floor area. However, the DC de-icing device will only operate in winter, resulting in low utilization rate. In order to improve the utilization rate of equipment and the power supply reliability of the distribution network, this paper analyzes the current situation of DC de-icing technology and proposes a VSC-HVDC de-icing system composed of two sets of voltage-source DC de-icing devices, which can improve the de-icing efficiency in parallel; Some strategies are proposed, such as AC power balance control of sectionalized busbar under VSC interconnection of de-icing devices as well as emergency power transfer for AC single-end power loss. The paper also builds an EMTDC simulation model of the VSC DC de-icing system and carries out a simulation test, which verifies the functions of the VSC-HVDC de-icing system, such as ice-melting, VAR compensation, AC power balance, and emergency power transfer for AC single-end power loss, etc. The related functions are also verified in the engineering site, which shows that the VSC-HVDC de-icing system proposed in this paper can improve the power supply reliability of distribution substations.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124294444","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}

引用次数: 2

Summary of research on cascading failures of high proportion new energy power systems 高比例新能源电力系统级联故障研究综述

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2586

A. Wang, W. Zhong, Z. Shen, X. Wang, Y. Yang

引用次数: 1

Analysis and suppression of subsynchronous oscillation of Rudong wind power through MMC-HVDC system MMC-HVDC系统对如东风电次同步振荡的分析与抑制

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2553

J. Li, X. Xie, J. Yang, H. Li, Z. Shi, K. Wang, C. Fu, W. Yang

{"title":"Analysis and suppression of subsynchronous oscillation of Rudong wind power through MMC-HVDC system","authors":"J. Li, X. Xie, J. Yang, H. Li, Z. Shi, K. Wang, C. Fu, W. Yang","doi":"10.1049/icp.2021.2553","DOIUrl":"https://doi.org/10.1049/icp.2021.2553","url":null,"abstract":"There may be complex interaction between the converter control systems of wind power and MMC-HVDC, which will lead to sub-/super-synchronous oscillation and threaten the safe and stable operation of the system. The relevant events have been reported in Guangdong Nan'ao, Shanghai Nanhui and Zhangbei projects. Rudong offshore wind power project is the first offshore wind power transmission system in China, and it is still under construction. Therefore, it is of great significance to carry out the research on the risk analysis and suppression measures of sub-synchronous oscillation in Rudong wind power MMC-HVDC system. First, the time-domain simulation model of Rudong wind power MMC-HVDC system is built in the PSCAD/EMTDC simulation model. Then, the effects of the number of wind turbine generators, wind power output and the parameters of MMC-HVDC controller on the sub-/super-synchronous oscillation characteristics of the system are further analyzed. Finally, the suppression measures based on supplementary frequency dependent gain control are proposed, the application position of the controller is discussed, and the parameter optimization method of the controller is given. The research content provides a certain guiding significance for the operation and control of Rudong wind power MMC-HVDC.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127979238","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}

引用次数: 2

Research on electrical contact fault characteristics of GIS circuit breaker based on vibration signal 基于振动信号的GIS断路器电触点故障特征研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2546

C. Baiquan, C. Bangfa, W. Pengyang, G. Xuan, L. Qiang

{"title":"Research on electrical contact fault characteristics of GIS circuit breaker based on vibration signal","authors":"C. Baiquan, C. Bangfa, W. Pengyang, G. Xuan, L. Qiang","doi":"10.1049/icp.2021.2546","DOIUrl":"https://doi.org/10.1049/icp.2021.2546","url":null,"abstract":"In order to analyze the vibration characteristics of GIS equipment when the contact is poor, we established a threedimensional model of 40.5kV circuit breaker by using the magnetism and solid coupling method. By changing the ratio of the close contact area of moving and stationary contacts to the total area of moving contacts (contact ratio), the situation of poor electrical contact was simulated and analyzed. The simulation results show that, when the contact ratio is constant, the current increases from 1000A to 3000A, and the acceleration of the contact also increases. In the case of the same current, the acceleration value when the contact ratio is 0.3 is greater than the value when the contact ratio is 0.6. When the contact ratio is 0.3 and the current is 3000A, the acceleration amplitude of the component with the frequency of 100Hz is the largest, which is 0.07m/s2. After research and analysis, it is shown that the vibration signal is based on 100Hz as the fundamental frequency. At the same time, multiple frequency components such as 300Hz, 600Hz and some other high-frequency components are generated. Therefore, the contact state can be judged through the measurement and analysis of the vibration signal.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125074110","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}

引用次数: 0

Analysis and simulation of UPFC device on power flow optimization and suppression of short-circuit faults of network transmission line UPFC装置对网络传输线潮流优化和短路故障抑制的分析与仿真

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2582

G. Gao, K. Zhu

引用次数: 0

Fault identification method of MMC-HVDC based on GRU neural network 基于GRU神经网络的MMC-HVDC故障识别方法

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2580

D. Zheng, Y. Wang, W. Mo

引用次数: 0

A fault testing method of hvdc converter valve control unit based on TCU structure 基于TCU结构的直流换流阀控制单元故障检测方法

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2532

H. Cong, W. Rongchao, S. Yang

引用次数: 0

Fault current suppression for MMC-MTDC with the resistive type superconducting fault current limiter 电阻式超导故障限流器对MMC-MTDC故障电流的抑制

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2530

G. Liu, Ping Guo, Zheng Yuan, Y. Zhao

{"title":"Fault current suppression for MMC-MTDC with the resistive type superconducting fault current limiter","authors":"G. Liu, Ping Guo, Zheng Yuan, Y. Zhao","doi":"10.1049/icp.2021.2530","DOIUrl":"https://doi.org/10.1049/icp.2021.2530","url":null,"abstract":"With effective properties, a resistive-type superconducting fault current limit (R-SFCL) has become an effective device to restrain DC-side bipolar short fault currents in multilevel modular converter multiterminal DC systems (MMC-MTDCs). However, due to the resistance-energy accumulation-dependent characteristics of the R-SFCL device, the fault durations and different fault current values will produce various output resistances at each fault stage, and the related coordinated protection and control strategy needs to be adjusted accordingly. Therefore, in the first part of this paper, we analysed the DC side short circuit current mechanism and the fault current restraint characteristics of R-SFCLs. Subsequently, to verify the above analysis, the R-SFCL-based four-terminal MMC-MTDC with DC bipolar short fault modelling and simulation are presented in the next section. Finally, based on the above analysis and research, the advanced DC bipolar fault control and protection strategies of the R-SFCL-based MMC-MTDC system are discussed to promote further study of coordinated and protection control and the application of R-SFCLs in subsequent engineering applications.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131739134","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}

引用次数: 1