Abstract：This research is focusing on conducting partial equivalence method for the power grid which operates with voltage source converter (VSC) based on the virtual synchronous generator (VSG) control strategy.The feasibility of applying power grid equivalence method in VSC with synchronous generator power-angle characteristic features has been analyzed.Then, on the analogy of AC coherency-based method, a VSC type coherency criterion has been designed and a VSC parameter aggregation method based on virtual synchronous generator control has been put forward.Under PSCAD/EMTDC simulated environment, VSCs parallel operation model is built based on virtual synchronous generator control.This system is divided into internal area and external area.Based on the virtual power-angle curve after single-phase ground fault disturbance, the VSCs coherency is judged and divided them into different coherent groups.Each group is proceeded parameter aggregation respectively.Finally, the output curve of active and reactive power from external area to internal area is chosen as object.Based on comparing the output curve before and after equivalence, the error analysis result indicates that the power flow is invariant during the equivalence.This validates the correctness and effectiveness of the referred coherency equivalence method.
李承昱,许建中,赵成勇,刘炜. 基于虚拟同步发电机控制的VSC类同调等值方法[J]. 电工技术学报, 2016, 31(13): 111-119.
Li Chengyu,Xu Jianzhong,Zhao Chengyong,Liu Wei. Coherency Equivalence Method for Voltage Source Converter Based onVirtual Synchronous Generator. Transactions of China Electrotechnical Society, 2016, 31(13): 111-119.
[1] 刘杨华,吴政球,涂有庆,等.分布式发电及其并网技术综述[J].电网技术,2008,32(15):71-76. Liu Yanghua,Wu Zhengqiu,Tu Youqing,et al.A survey on distributed generation and its networking technology[J].Power System Technology,2008,32(15):71-76. [2] 孟建辉,石新春,王毅,等.改善微电网频率稳定性的分布式逆变电源控制策略[J].电工技术学报,2015,30(4):70-79. Meng Jianhui,Shi Xinchun,Wang Yi,et al.Control strategy of DER inverter for improving frequency stability of microgrid[J].Transactions of China Electrotechnical Society,2015,30(4):70-79. [3] 朱旋,陈得宝,方振国,等.平均成本下垂控制策略在分布式发电中的应用[J].电力系统保护与控制,2015,43(10):14-20. Zhu Xuan,Chen Debao,Fang Zhenguo,et al.Mean cost-based droop scheme in the application of distributed generators[J].Power System Protection and Control,2015,43(10):14-20. [4] Xu J,Gole A M,Zhao C.The use of averaged-value model of modular multilevel converter in DC grid[J].IEEE Transactions on Power Delivery,2015,30(2):519-528. [5] 张玉治,张辉,贺大为,等.具有同步发电机特性的微电网逆变器控制[J].电工技术学报,2014,29(7):261-268. Zhang Yuzhi,Zhang Hui,He Dawei,et al.Control strategy of micro grid converters with synchronous generator characteristic[J].Transactions of China Electrotechnical Society,2014,29(7):261-268. [6] Zhong Q C,Weiss G.Synchronverters:inverters that mimic synchronous generators[J].IEEE Transactions on Industrial Electronics,2011,58(4):1259-1267. [7] 吕志鹏,盛万兴,钟庆昌,等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报,2014,34(16):2591-2603. Lü Zhipeng,Sheng Wanxing,Zhong Qingchang,et al.Virtual synchronous generator and its applications in micro-grid[J].Proceedings of the CSEE,2014,34(16):2591-2603. [8] 孟建辉,王毅,石新春,等.基于虚拟同步发电机的分布式逆变电源控制策略及参数分析[J].电工技术学报,2014,29(12):1-10. Meng Jianhui,Wang Yi,Shi Xinchun,et al.Control strategy and parameter analysis of distributed inverters based on VSG[J].Transactions of China Electrotechnical Society,2014,29(12):1-10. [9] Ming W L,Zhong Q C.Synchronverter-based transformerless PV inverters[C]//40 th Annual Conference of the IEEE on Industrial Electronics Society,Dallas,2014:4396-4401. [10]Sakimoto K I,Sugimoto K,Shindo Y.Low voltage ride through capability of a grid connected inverter based on the virtual synchronous generator[C]//10 th International Conference on IEEE Power Electronics and Drive Systems,Kitakyushu,Japan,2013:1066-1071. [11]王思耕,葛宝明,毕大强.基于虚拟同步发电机的风电场并网控制研究[J].电力系统保护与控制,2011,39(21):49-54. Wang Sigeng,Ge Baoming,Bi Daqiang.Control strategies of grid-connected wind farm based on virtual synchronous generator[J].Power System Protection and Control,2011,39(21):49-54. [12]Aouini R,Marinescu B,Ben K K,et al.Synchronverter-based emulation and control of HVDC transmission[J].IEEE Transactions on Power Systems,2015,31(1):1-9. [13]吴轩钦,谭国俊,何凤有,等.变频驱动系统电网接口虚拟同步发电机[J].电工技术学报,2015,30(23):83-92. Wu Xuanqin,Tan Guojun,He Fengyou,et al.Virtual synchronous generator control scheme of grid interface for variable frequency drive systems[J].Transactions of China Electrotechnical Society,2015,30(23):83-92. [14]张武其,吕洋.向弱电网供电的VSC-HVDC系统的模拟惯量控制策略研究[J].电力系统保护与控制,2016,44(6):104-110. Zhang Wuqi,Lü Yang.Emulation inertia control strategy for VSC-HVDC supplying weak network[J].Power System Protection and Control,2016,44(6):104-110. [15]倪以信,陈寿孙,张宝霖.动态电力系统的理论和分析[M].北京:清华大学出版社,2002. [16]杨靖萍.大规模互联电力系统动态等值方法研究[D].杭州:浙江大学,2007. [17]Kim S,Overbye T J.Enhanced measurement-based dynamic equivalence using coherency identification[C]//IEEE Power and Energy Conference,Illinois,2013:200-205. [18]李光辉.面向实时仿真的大规模交直流混联电网动态等值研究[D].上海:上海交通大学,2013. [19]Zhang Baozhen,Zhang Yao,Liao Mingyang,et al.Study on dynamic equivalent coherency-based of Hainan power grid[C]//2012 Asia-Pacific Power and Energy Engineering Conference,Shanghai,2012:1-4. [20]张元,郝丽丽,戴嘉祺.风电场等值建模研究综述[J].电力系统保护与控制,2015,43(6):138-146. Zhang Yuan,Hao Lili,Dai Jiaqi.Overview of the equivalent model research for wind farms[J].Power System Protection and Control,2015,43(6):138-146. [21]查晓明,张扬,成燕,等.用于简化微电网结构的微分几何广义同调方法[J].电工技术学报,2012,27(1):24-31. Zha Xiaoming,Zhang Yang,Cheng Yan,et al.New method of extended coherency for micro-grid based on homology in differential geometry[J].Transactions of China Electrotechnical Society,2012,27(1):24-31. [22]Remon D,Cantarellas A M,Rakhshani E,et al.An active power synchronization control loop for grid-connected converters[C]//IEEE Power and Energy Society General Meeting,Washington,2014:1-5. [23]常鲜戎,赵书强.电力系统暂态过程[M].北京:机械工业出版社,2010.
2016, Vol. 31 
