洪潮,陈雁,李鹏飞,李霞林,郭力

• 1:直流输电技术国家重点实验室(南方电网科学研究院有限责任公司)
• 2:智能电网教育部重点实验室(天津大学)

摘要(Abstract)：

为提高基于双回柔性直流两区域异步互联系统电网频率稳定性,提出一种基于"就地控制"与"上层集中"相结合的频率一致性控制。"上层集中"控制层通过对就地电压及功率信息进行处理及控制,为"就地控制"层提供直流电压参考及辅助功率参考;"就地控制"层在常规控制基础上,两端换流站均引入通用化频率-电压辅助控制结构;同时引入直流电压信号调整系数α。最后,通过PSCAD/EMTDC仿真,验证了所提策略可有效改善受扰电网频率动态特性,实现了系统旋转备用共享,同时实现了紧急支撑功率由双回线路依据其备用容量比进行承担,电压信号可灵活切换,提高了通信故障等紧急工况下系统可靠性。

关键词(KeyWords)： 基于双回柔性直流两区域异步互联系统;频率一致性控制;旋转备用共享;通用化控制结构

Abstract:

Keywords:

基金项目(Foundation): 中国南方电网有限责任公司科技项目(实现大电网柔性互联的柔性直流控制和性能要求,ZBKJXM20170068)

作者(Author): 洪潮,陈雁,李鹏飞,李霞林,郭力

DOI: 10.19635/j.cnki.csu-epsa.000375

参考文献(References)：

• [1]汤广福，贺之渊，庞辉（Tang Guangfu,He Zhiyuan,Pang Hui）.柔性直流输电工程技术研究、应用及发展（Research,application and development of VSC-HVDC engineering technology)[J].电力系统自动化（Automation of Electric Power Systems),2013,37(15):3-14.
• [2]徐政，陈海荣（Xu Zheng,Chen Hairong）.电压源换流器型直流输电技术综述（Review and applications of VSCHVDC)[J].高电压技术（High Voltage Engineering),2007,33(1):1-10.
• [3]马为民，吴方劼，杨一鸣，等（Ma Weimin,Wu Fangjie,Yang Yiming,et al）.柔性直流输电技术的现状及应用前景分析（Flexible HVDC transmission technology’s today and tomorrow)[J].高电压技术（High Voltage Engineering),2014,40(8):2429-2439.
• [4]唐欣，江志初，张凯峰，等（Tang Xin,Jiang Zhichu,Zhang Kaifeng,et al).VSC-HVDC系统对电网低频振荡的阻尼方法及控制参数选取（Damping method of VSC-HVDC system for low-frequency oscillation of power grid and selection of control parameters)[J].电力系统及其自动化学报（Proceedings of the CSU-EPSA),2018,30(6):115-119.
• [5]汪娟娟，禤小聪，罗敬华，等（Wang Juanjuan,Xuan Xiaocong,Luo Jinghua,et al）.共站同塔双回高压直流输电系统双回控制功能及其仿真（Double-circuit control function for HVDC transmission system adopting common station and double-circuit on the same tower)[J].电力系统自动化（Automation of Electric Power Systems),2014,38(23):119-126.
• [6]薛英林，李普明，徐政，等（Xue Yinglin,Li Puming,Xu Zheng,et al）.同塔双回高压直流工程交流滤波器设计（Design of alternating current filter for double circuit high voltage direct current transmission project)[J].电力系统自动化（Automation of Electric Power Systems),2010,34(17):50-54.
• [7]张民，石岩（Zhang Min,Shi Yan）.同杆并架±500 kV直流系统间相互影响的实时仿真分析（Real-time digital simulation analysis on interaction between two±500 kVHVDC systems erected on the same tower)[J].电网技术（Power System Technology),2007,31(1):44-49.
• [8]Kundur P.电力系统稳定与控制[M].北京：中国电力出版社，2001.
• [9]徐泰山，薛禹胜（Xu Taishan,Xue Yusheng）.暂态频率偏移可接受性的定量分析（Quantitative assessments of transient frequency deviation acceptability)[J].电力系统自动化（Automation of Electric Power Systems),2002,26(19):7-10.
• [10]程丽敏，李兴源（Cheng Limin,Li Xingyuan）.多区域交直流互联系统的频率稳定控制（Load frequency control in multi-area AC/DC interconnected power system)[J].电力系统保护与控制（Power System Protection and Control),2011,39(7):56-62.
• [11]李广凯，江政昕，赵昕，等（Li Guangkai,Jiang Zhengxin,Zhao Xin,et al）.电压源换流器高压直流输电的特点与前景（The characteristics and prospect of VSC-HVDCpower transmission)[J].南方电网技术（Southern Power System Technology),2011,5(5):13-17.
• [12]安婷，Bjarne Andersen,Norman MacLeod，等（An Ting,Bjarne Andersen,Norman MacLeod,et al）.中欧高压直流电网技术论坛综述（Overview of Sino-European HVDC grid technical forum)[J].电网技术（Power System Technology),2017,41(8):2407-2416.
• [13]朱红萍，罗隆福（Zhu Hongping,Luo Longfu）.直流调制策略改善交直流混联系统的频率稳定性研究（Improving frequency stability of parallel AC-DC hybrid systems by power modulation strategy of HVDC link)[J].中国电机工程学报（Proceedings of the CSEE),2012,32(16):36-43.
• [14]余涛，沈善德（Yu Tao,Shen Shande）.华中-华东多回HVDC辅助功率/频率控制（Study on the auxiliary power/frequency control of Center China to East China multi-circuit HVDC links)[J].电力系统自动化（Automation of Electric Power Systems),2005,29(1):77-82.
• [15]袁旭峰，文劲宇，程时杰（Yuan Xufeng,Wen Jinyu,Cheng Shijie）.多端直流输电系统中的直流功率调制技术（DC power modulation in multi-terminal HVDC transmission system)[J].电网技术（Power System Technology),2007,31(14):57-61,78.
• [16]陈亦平，程哲，张昆，等（Chen Yiping,Cheng Zhe,Zhang Kun,et al）.高压直流输电系统孤岛运行调频策略（Frequency regulation strategy for islanding operation of HVDC)[J].中国电机工程学报（Proceedings of the CSEE),2013,33(4):96-102.
• [17]贺静波，张剑云，李明节，等（He Jingbo,Zhang Jianyun,Li Mingjie,et al）.直流孤岛系统调速器稳定问题的频域分析与控制方法（An approach for analysis and control of governor stability in islanded HVDC sending systems)[J].中国电机工程学报（Proceedings of the CSEE),2013,33(16):137-143.
• [18]Chaudhuri N R,Majumder R,Chaudhuri B.System frequency support through multi-terminal DC(MTDC)grids[J].IEEE Trans on Power Systems,2013,28(1):347-356.
• [19]朱瑞可，李兴源，应大力（Zhu Ruike,Li Xingyuan,Ying Dali).VSC-MTDC互联系统频率稳定控制策略（A frequency stability control strategy for interconnected VSC-MTDC transmission system)[J].电网技术（Power System Technology),2014,38(10):2729-2734.
• [20]朱瑞可，王渝红，李兴源，等（Zhu Ruike,Wang Yuhong,Li Xingyuan,et al）.用于VSC-HVDC互联系统的附加频率控制策略（An additional frequency control strategy for interconnected systems through VSC-HVDC)[J].电力系统自动化（Automation of Electric Power Systems),2014,38(16):81-87.
• [21]郑天文，陈来军，陈天一，等（Zheng Tianwen,Chen Laijun,Chen Tianyi,et al）.虚拟同步发电机技术及展望（Review and prospect of virtual synchronous generator technologies)[J].电力系统自动化（Automation of Electric Power Systems),2015,39(21):165-175.
• [22]付强，杜文娟，黄登一，等（Fu Qiang,Du Wenjuan,Huang Dengyi,et al）.含虚拟同步发电机的多端柔性直流系统稳定性分析（Stability analysis of multi-terminal flexible DC system with virtual synchronous generators)[J].电力系统自动化（Automation of Electric Power Systems),2018,42(9):164-170.
• [23]姚为正，杨美娟，张海龙，等（Yao Weizheng,Yang Meijuan,Zhang Hailong,et al).VSC-HVDC受端换流器参与电网调频的VSG控制及其改进算法（VSG control and its modified algorithm for VSC-HVDC inverter participating grid’s frequency regulation)[J].中国电机工程学报（Proceedings of the CSEE),2017,37(2):525-533.
• [24]Kirakosyan A,El-Saadany E F,Moursi M S,et al.DC voltage regulation and frequency support in pilot voltage droop-controlled multiterminal HVDC systems[J].IEEETrans on Power Delivery,2018,33(3):1153-1164.