渝鄂背靠背柔性直流频率限值控制器优化设计Optimization Design of Frequency Limit Controller of Back-to-Back VSC-HVDC
陈启超;李晖;吴文传;张怡;王菲;蒋维勇;盖振宇;
摘要(Abstract):
渝鄂背靠背柔性直流工程投运后,西南电网与华中电网异步互联,系统面临频率稳定问题以及孤岛运行风险,可通过合理的配置并设计柔直频率限值控制器(frequency limit controller,FLC)来改善系统频率稳定性并保证故障后联网转孤岛能够稳定运行。FLC属于柔性直流输电系统的附加控制,能够根据交流频率变化迅速调节传输功率。针对渝鄂柔直工程两侧交流系统特性提出了FLC的配置与设计原则,选取了适合一次调频的FLC控制方案并进行了相关的参数设计,采用时域仿真法分析了FLC参数对联网转孤岛过程系统暂态特性的影响,并对参数进行了相应的优化。仿真结果表明,所设计的FLC能够有效适应联网运行、联网转孤岛以及孤岛运行等不同运行模式,提高系统的频率稳定水平。
关键词(KeyWords): 背靠背;柔性直流;频率限值控制器;孤岛
基金项目(Foundation): 国家电网公司科技项目(XT71-18-036)~~
作者(Author): 陈启超;李晖;吴文传;张怡;王菲;蒋维勇;盖振宇;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.0601
参考文献(References):
- [1]李伟,肖湘宁,陶顺,等.特高压直流送端孤岛系统频率稳定控制[J].电力自动化设备,2018,38(11):197-203.Li Wei,Xiao Xiangning,Tao Shun,et al.Frequency stability control for islanded UHVDC sending end system[J]. Electric Power Automation Equipment,2018,38(11):197-203(in Chinese).
- [2]王华伟,韩民晓,范园园,等.呼辽直流孤岛运行方式下送端系统频率特性及控制策略[J].电网技术,2013,37(5):1401-1406.Wang Huawei,Han Minxiao,Fan Yuanyuan,et al.Sending end frequency characteristics under islanded operation mode of HVDC transmission system from Hulun Buir to Liaoning and corresponding control strategy[J]. Power System Technology, 2013, 37(5):1401-1406(in Chinese).
- [3]梅勇,周剑,吕耀棠,等.直流频率限制控制(FLC)功能在云南异步联网中的应用[J].中国电力,2017,50(10):64-70.Mei Yong,Zhou Jian,L?Yaotang,et al.Study on application of HVDC frequency limit control(FLC)in asynchronously interconnected Yunnan grid[J].Electric Power,2017,50(10):64-70(in Chinese).
- [4]朱瑞可,李兴源,应大力.VSC-MTDC互联系统频率稳定控制策略[J].电网技术,2014,38(10):2729-2734.Zhu Ruike,Li Xingyuan,Ying Dali.A frequency stability control strategy for interconnected VSC-MTDC transmission system[J].Power System Technology,2014,38(10):2729-2734(in Chinese).
- [5]朱琳,贺之渊,吴学光,等.渝鄂背靠背柔性直流附加控制对系统稳定性的影响[J].电网技术,2018,42(8):2519-2527.Zhu Lin,He Zhiyuan,Wu Xueguang,et al.Influence of additional control strategy of back-to-back VSC-HVDC on system stability[J].Power System Technology,2018,42(8):2519-2527(in Chinese).
- [6]袁志昌,吴志力,金强,等.含直流电压二次调节的VSC-MTDC互联系统频率稳定控制[J].电力系统自动化,2018,42(23):9-13,19.Yuan Zhichang,Wu Zhili,Jin Qiang,et al.Frequency stabilization control strategy with DC voltage secondary regulation of VSC-MTDC based interconnected systems[J]. Automation of Electric Power Systems,2018,42(23):9-13,19(in Chinese).
- [7]刘昇,徐政,李文云,等.用于改善交流系统暂态稳定性的VSC-HVDC交流电压–频率协调控制策略[J].中国电机工程学报,2015,35(19):4879-4887.Liu Sheng,Xu Zheng,Li Wenyun,et al.VSC-HVDC AC voltagefrequency coordination control strategy for improving AC system transient stability[J].Proceedings of the CSEE,2015,35(19):4879-4887(in Chinese).
- [8]赵良,覃琴,郭强,等.中蒙直流输电工程送端孤岛频率控制问题[J].电网技术,2008,32(21):22-25.Zhao Liang,Qin Qin,Guo Qiang,et al.Power system technology frequency control for islanded system at sending terminal of HVDC power transmission from China to Mongolia[J]. Power System Technology,2008,32(21):22-25(in Chinese).
- [9]李朝顺,张正茂,康激扬.大直流弱送端系统安全稳定控制策略[J].电网技术,2014,38(1):28-32.Li Chaoshun,Zhang Zhengmao,Kang Jiyang.Research on security and stability control strategy for weak sending-end system of large capacity HVDC power transmission system[J]. Power System Technology,2014,38(1):28-32(in Chinese).
- [10]王华伟,韩民晓,雷霄,等.火电机组直流孤岛系统频率控制分析与系统试验[J].中国电机工程学报,2017,37(1):139-149.Wang Huawei,Han Minxiao,Lei Xiao,et al.Frequency control analysis and system commissioning for thermal generation with HVDC islanded operation[J].Proceedings of the CSEE,2017,37(1):139-149(in Chinese).
- [11]贺静波,张剑云,李明节,等.直流孤岛系统调速器稳定问题的频域分析与控制方法[J].中国电机工程学报,2013,33(16):137-143.He Jingbo,Zhang Jianyun,Li Mingjie,et al.Frequency domain analysis and control for governor stability problem in islanded HVDC sending systems[J].Proceedings of the CSEE,2013,33(16):137-143(in Chinese).
- [12]陈亦平,程哲,张昆,等.高压直流输电系统孤岛运行调频策略[J].中国电机工程学报,2013,33(4):96-102.Chen Yiping,Cheng Zhe,Zhang Kun,et al.Frequency regulation strategy for islanding operation of HVDC[J].Proceedings of the CSEE,2013,33(4):96-102(in Chinese).
- [13]李伟,肖湘宁,郭琦.云广特高压直流送端孤岛运行超低频振荡与措施[J].电力系统自动化,2018,42(16):161-166.Li Wei,Xiao Xiangning,Guo Qi.Ultra-low-frequency oscillation and countermeasures in Yunnan-Guangdong UHVDC sending-end system in islanded operating mode[J]. Automation of Electric Power Systems,2018,42(16):161-166(in Chinese).
- [14]李建,王彪,刘程卓,等.基于直流频率限制控制器的超低频振荡抑制方案[J].高电压技术,2018:1-8.Li Jian,Wang Biao,Liu Chengzhuo,et al.Suppression scheme for ultra-low frequency oscillation based on frequency limit controller[J].High Voltage Engineering,2018:1-8(in Chinese).
- [15]王菲,刘建琴,韩丰,等.应用直流调制改善水电能源基地交流电网运行特性[J].电网技术,2017,41(12):3911-3916.Wang Fei,Liu Jianqin,Han Feng,et al.Application of DC modulation to improving operation characteristics of hydropower base grid[J].Power System Technology,2017,41(12):3911-3916(in Chinese).
- [16]高琴,陈亦平,朱林,等.多直流异步互联系统中频率限制器的控制策略优化设计[J].电力系统自动化,2018,42(12):167-172.Gao Qin,Chen Yiping,Zhu Lin,et al.Strategy design of frequency limit controller on multi-HVDC asynchronous interconnected power system[J].Automation of Electric Power Systems,2018,42(12):167-172(in Chinese).
- [17]汤华,王渝红,魏亮,等.HVDC孤岛运行附加频率鲁棒控制器设计[J].电网技术,2016,40(4):1066-1072.Tang Hua,Wang Yuhong,Wei Liang,et al.An additional frequency robust controller for HVDC transmission system under islanding operation[J].Power System Technology,2016,40(4):1066-1072(in Chinese).
- [18]赵磊,刘天琪,李兴源.基于变结构控制理论的高压直流附加频率控制器设计[J].电力自动化设备,2017,37(11):218-223.Zhao Lei,Liu Tianqi,Li Xingyuan.Design of HVDC additional frequency controller based on variable structure control theory[J].Electric Power Automation Equipment,2017,37(11):218-223(in Chinese).
- [19]曾令康,李大虎,姚伟,等.适用于背靠背柔性直流输电的双环附加频率控制[J].电力自动化设备,2018,38(12):113-120.Zeng Lingkang,Li Dahu,Yao Wei,et al.Dual-loop supplementary frequency control for BTB-VSC-HVDC[J]. Electric Power Automation Equipment,2018,38(12):113-120(in Chinese).
- [20]娄源媛,蒋若蒙,钱峰,等.考虑负荷特性的解列后受端电网频率控制策略[J].电网技术,2019,43(1):213-220.Lou Yuanyuan,Jiang Ruomeng,Qian Feng,et al.Frequency control strategy after receiving-end power grid splitting considering load characteristics[J].Power System Technology,2019,43(1):213-220(in Chinese).
- [21]张志强,徐友平,袁荣湘,等.大型互联区域电网解列后送端电网频率特性及高频切机方案[J].电网技术,2015,39(1):288-293.Zhang Zhiqiang,Xu Youping,Yuan Rongxiang,et al.Frequency characteristics of power grid at sending end of split large-scale interconnected regional power grid and corresponding over-frequency generator-tripping scheme[J].Power System Technology,2015,39(1):288-293(in Chinese).