基于不平衡功率动态估计的直流幅值阶梯递增紧急功率支援
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摘要
建立扰动下系统不平衡功率的扩张状态观测器,并对观测器参数进行设置,实现不平衡功率的实时准确估计;考虑影响直流紧急功率支援限制因素,优化紧急功率支援量,基于功率支援阶梯递增原则实现功率支援目标;根据扰动功率大小,通过定义阈值指标实现3种幅值阶梯递增支援方案的选择。在PSCAD中搭建4机2区域交直流并联输电系统,仿真结果验证了所提方法的有效性。
The extended state observer of unbalanced power in power system under disturbance is built,and its parameters are set up to realize the real-time and accurate estimation of unbalanced power. Considering the limiting factors of DC emergency power support,the emergency power support capacity is optimized,and the power support target is achieved based on the stepped increment principle of power support. According to the power disturbances,the threshold index is defined to realize the selection of three amplitude stepped incremental support schemes. A 4-machine 2-area AC/DC parallel transmission system is built in PSCAD,and the simulative results verify the effectiveness of the proposed method.
The extended state observer of unbalanced power in power system under disturbance is built,and its parameters are set up to realize the real-time and accurate estimation of unbalanced power. Considering the limiting factors of DC emergency power support,the emergency power support capacity is optimized,and the power support target is achieved based on the stepped increment principle of power support. According to the power disturbances,the threshold index is defined to realize the selection of three amplitude stepped incremental support schemes. A 4-machine 2-area AC/DC parallel transmission system is built in PSCAD,and the simulative results verify the effectiveness of the proposed method.
引文
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[15]刘崇茹,魏佛送,陈作伟,等.幅值自适应的阶梯式紧急功率支援控制技术[J].电力系统自动化,2013,37(21):123-128.LIU Chongru,WEI Fosong,CHEN Zuowei,et al. Magnitude adaptive emergency power support control technology[J]. Automation of Electric Power Systems,2013,37(21):123-128.
[2]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.
[3]HARNEFORS L,JOHANSSON N,ZHANG L,et al. Inter area oscillation damping using active power modulation of multi terminal HVDC transmissions[J]. IEEE Transactions on Power Systems,2014,29(5):2529-2538.
[4]王兴刚,张虹,徐政,等.基于轨迹灵敏度的多回直流紧急功率提升策略[J].电力自动化设备,2014,34(10):86-91.WANG Xinggang,ZHANG Hong,XU Zheng,et al. Emergency power support for multiple DCs based on trajectory sensitivity[J]. Electric Power Automation Equipment,2014,34(10):86-91.
[5]丁贵立,林涛,陈汝斯,等.基于参量Lyapunov理论的广域时滞阻尼控制器设计[J].电力自动化设备,2018,38(8):81-87.DING Guili,LIN Tao,CHEN Rusi,et al. Design of wide-area timedelay damping controller based on parametric Lyapunov theory[J].Electric Power Automation Equipment,2018,38(8):81-87.
[6]李从善,刘天琪,刘利兵,等.直流多落点系统自抗扰附加阻尼控制[J].电工技术学报,2015,30(7):10-17.LI Congshan,LIU Tianqi,LIU Libing,et al. A auto disturbance rejection controller of multi-HVDC[J]. Transactions of China Electrotechnical Society,2015,30(7):10-17.
[7]翁华,徐政,许烽,等.直流系统紧急功率支援的限制因素分析[J].中国电机工程学报,2014,34(10):1519-1527.WENG Hua,XU Zheng,XU Feng,et al. Research on constraint factor of emergency power support of HVDC systems[J]. Proceedings of the CSEE,2014,34(10):1519-1527.
[8]谢惠藩,张尧,林凌雪,等.基于时间最优和自抗扰跟踪的广域紧急直流功率支援控制[J].电工技术学报,2010,25(8):145-153.XIE Huifan,ZHANG Yao,LIN Lingxue,et al. Emergency DC power support control based on time-optimal control and auto-disturbance rejection control[J]. Transactions of China Electrotechnical Society,2010,25(8):145-153.
[9]颜秉勇,田作华,施颂椒,等.高压直流输电系统故障诊断新方法[J].电力系统自动化,2007,31(16):57-61.YAN Bingyong,TIAN Zuohua,SHI Songjiao,et al. A new method for fault diagnosis in HVDC systems[J]. Automation of Electric Power Systems,2007,31(16):57-61.
[10]林飞,张春朋,宋文超,等.基于扩张状态观测器的感应电机转子磁链观测[J].中国电机工程学报,2003,23(4):145-147.LIN Fei,ZHANG Chunpeng,SONG Wenchao,et al. Flux observer of induction motor based on extended state observer[J]. Proceedings of the CSEE,2003,23(4):145-147.
[11]韩京清.一类不确定对象的扩张状态观测器[J].控制与决策,1995,10(1):85-88.HAN Jingqing. The extended state observer of a class of uncertain system[J]. Control and Decision,1995,10(1):85-88.
[12]韩京清.自抗扰控制技术[M].北京:国防工业出版社,2013:183-242.
[13]KRISHAYYA P C S,ADAPA R,HOLM M. IEEE guide for planning DC links terminating at AC locations having low short-circuit capacities:IEEE Standard 1204-1997[S].[S.l.]:IEEE,1997.
[14]肖鸣,傅闯.高压直流低负荷无功优化功能运行分析[J].电力系统自动化,2010,34(5):91-95.XIAO Ming,FU Chuang. An operation analysis of HVDC low load reactive power optimization function[J]. Automation of Electric Power Systems,2010,34(5):91-95.
[15]刘崇茹,魏佛送,陈作伟,等.幅值自适应的阶梯式紧急功率支援控制技术[J].电力系统自动化,2013,37(21):123-128.LIU Chongru,WEI Fosong,CHEN Zuowei,et al. Magnitude adaptive emergency power support control technology[J]. Automation of Electric Power Systems,2013,37(21):123-128.