直流频率限制器参数整定及协调控制
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摘要
异步联网方式下,送端电网的频率稳定问题需要重点关注。在直流系统发生闭锁性故障后,采用直流频率限制器(frequency limit controller FLC)进行故障调频能够抑制送端电网出现的高频问题。文中介绍了直流频率限制器的结构原理以及参数整定方法,并针对直流频率限制器退出时可能发生的"二次动作"现象提出延时及比例参数切换的方法进行优化。最后针对多回直流频率限制器间的协调问题,提出基于直流频率限制器作用系数的控制策略。结果表明,文中设计的FLC能够对电网频率稳定实现有效控制多回直流FLC协调控制策略可以防止出现过调节现象。
Forasynchronous interconnection system,when a DC blocking fault occurs in DC system,the high frequency generated in the sending end network can be suppressed by using the frequency limit controller(FLC). This paper introduces the structure and parameters tuning method of FLC,and proposes a parameters optimization method to avoid FLC to act again when the FLC exits. Aiming at the coordination problem among multiple FLCs,a control strategy based on FLC’s influencing coefficient is proposed. Further,an FLC is designed,and it is demonstrated that the FLC can realize effective control of frequency stability in the sending end network,and the control strategy for multiple FLCs can suppress the over tuning effectively.
Forasynchronous interconnection system,when a DC blocking fault occurs in DC system,the high frequency generated in the sending end network can be suppressed by using the frequency limit controller(FLC). This paper introduces the structure and parameters tuning method of FLC,and proposes a parameters optimization method to avoid FLC to act again when the FLC exits. Aiming at the coordination problem among multiple FLCs,a control strategy based on FLC’s influencing coefficient is proposed. Further,an FLC is designed,and it is demonstrated that the FLC can realize effective control of frequency stability in the sending end network,and the control strategy for multiple FLCs can suppress the over tuning effectively.
引文
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[12]陈汉雄,莫骏.双侧频率调制改善特高压直流输电系统暂态稳定性研究[J].中国电力,2009,42(2):34-38.CHEN Hanxiong,MO Jun.Study of DC bilateral frequency power modulation to improve UHVDC transient stability[J].Electric Power,2009,42(2):34-38.
[13]马志恒.异步联网系统频率稳定性影响分析及对策研究[D].杭州:浙江大学,2015.MA Zhiheng.Analysis and strategy research of frequency stability of asynchronous interconnection grid[D].Hangzhou:Zhejiang University,2015.
[14]KUNDUR P.Power system stability and control[M].New York:McGraw-Hill,1994:262-263.
[15]魏亮,王渝红,李兴源,等.高压直流输电送端孤岛运行附加频率控制器设计[J].电力自动化设备,2016,36(1):143-148.WEI Liang,WANG Yuhong,LI Xingyuan,et al.Design of additional frequency controller for islanded sending-end operation of HVDC system[J].Electric Power Automation Equipment,2016,36(1):143-148.
[16]张恒旭,刘玉田.电力系统动态频率响应时空分布特征量化描述[J].中国电机工程学报,2009,29(7):64-70.ZHANG Hengxu,LIU Yutian.Quantitative description of space time distribution features of dynamic frequency responses[J].Proceedings of the CSEE,2009,29(7):64-70.
[17]周鑫,孙海顺.一种采用直流紧急控制的特高压联络线功率摇摆峰值抑制策略[J].中国电机工程学报,2015,35(10):28-35.ZHOU Xin,SUN Haishun.A swing peak suppression strategy of UHV tie-line power flow based on HVDCemergency control[J].Proceedings of the CSEE,2015,35(10):28-35.
[18]赵强,王丽敏,刘肇旭.全国电网互联系统频率特性及低频减载方案[J].电网技术,2009,33(8):35-40.ZHAO Qiang,WANG Limin,LIU Zhaoxu.Study on dynamic frequency characteristics and coordinative under-frequency load shedding scheme for nationwide interconnected power grid of China[J].Power System Technology,2009,33(8):35-40.
[19]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.
[2]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004:3-5.XU Zheng.Dynamic behavior analysis of AC and HVDChybrid power system[M].Beijing:China Machine Press,2004:3-5.
[3]吕清洁.送端电网稳定性若干问题及控制策略研究[D].杭州:浙江大学,2016.LYU Qingjie.Research on the Stability and control strategy of sending end network[D].Hangzhou:Zhejiang University,2016.
[4]马玉龙,石岩,殷威扬,等.HVDC送端孤岛运行方式的附加控制策略[J].电网技术,2006,30(24):22-25.MA Yulong,SHI Yan,YIN Weiyang,et al.Additional control strategy for islanded AC system at sending terminal of HVDC[J].Power System Technology,2006,30(24):22-25.
[5]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.Frequency control for islanded system at sending terminal of HVDCpower transmission from China to Mongolia[J].Power System Technology,2008,32(21):22-25.
[6]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.
[7]杜斌,柳勇军,涂亮,等.糯扎渡直流频率限制控制器研究[J].南方电网技术,2013,7(5):27-31.DU Bin,LIU Yongjun,TU Liang,et al.Study on the frequency limit control of Nuozhadu DC transmission project[J].Southren Power System Technology,2013,7(5):27-31.
[8]吕思卓,郑超,杨金刚,等.送端直流孤岛系统频率限制器优化控制策略[J].电力建设,2016(2):107-111.LYU Sizhuo,ZHENG Chao,YANG Jingang,et al.FLC optimization control strategy of islanded HVDC sending system[J].Electric Power Construction,2016,37(2):107-111.
[9]闵勇.电力系统稳定分析[M].北京:清华大学出版社,2016:180-181MIN Yong.Power system stability[M].Beijing:Tsinghua University Press,2016:180-181.
[10]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):1041-1046.
[11]李亚男,马为民,殷威扬,等.向家坝-上海特高压直流系统孤岛运行方式[J].高电压技术,2010,36(1):185-189.LI Yanan,MA Weiming,YIN Weiyang,et al.Island operation modes XS800 UHVDC system[J].High Voltage Engineering,2010,36(1):185-189.
[12]陈汉雄,莫骏.双侧频率调制改善特高压直流输电系统暂态稳定性研究[J].中国电力,2009,42(2):34-38.CHEN Hanxiong,MO Jun.Study of DC bilateral frequency power modulation to improve UHVDC transient stability[J].Electric Power,2009,42(2):34-38.
[13]马志恒.异步联网系统频率稳定性影响分析及对策研究[D].杭州:浙江大学,2015.MA Zhiheng.Analysis and strategy research of frequency stability of asynchronous interconnection grid[D].Hangzhou:Zhejiang University,2015.
[14]KUNDUR P.Power system stability and control[M].New York:McGraw-Hill,1994:262-263.
[15]魏亮,王渝红,李兴源,等.高压直流输电送端孤岛运行附加频率控制器设计[J].电力自动化设备,2016,36(1):143-148.WEI Liang,WANG Yuhong,LI Xingyuan,et al.Design of additional frequency controller for islanded sending-end operation of HVDC system[J].Electric Power Automation Equipment,2016,36(1):143-148.
[16]张恒旭,刘玉田.电力系统动态频率响应时空分布特征量化描述[J].中国电机工程学报,2009,29(7):64-70.ZHANG Hengxu,LIU Yutian.Quantitative description of space time distribution features of dynamic frequency responses[J].Proceedings of the CSEE,2009,29(7):64-70.
[17]周鑫,孙海顺.一种采用直流紧急控制的特高压联络线功率摇摆峰值抑制策略[J].中国电机工程学报,2015,35(10):28-35.ZHOU Xin,SUN Haishun.A swing peak suppression strategy of UHV tie-line power flow based on HVDCemergency control[J].Proceedings of the CSEE,2015,35(10):28-35.
[18]赵强,王丽敏,刘肇旭.全国电网互联系统频率特性及低频减载方案[J].电网技术,2009,33(8):35-40.ZHAO Qiang,WANG Limin,LIU Zhaoxu.Study on dynamic frequency characteristics and coordinative under-frequency load shedding scheme for nationwide interconnected power grid of China[J].Power System Technology,2009,33(8):35-40.
[19]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.
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