含新型统一潮流控制器的电力系统安全校正模型
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摘要
统一潮流控制器(UPFC)串联侧和并联侧接于不同母线的新型拓扑使得UPFC的传统稳态模型难以适用,灵敏度类安全校正方法忽略了无功功率的影响,可能会引入新的不安全因素。基于此,提出一种适应性更强的UPFC稳态模型,并提出一种含UPFC的潮流计算优化模型。在考虑无功功率的影响后,引入0-1变量将安全校正问题转化为以调整设备数目最少和调整量最少为目标的多目标优化问题。然后,通过权重区分发电机节点和负荷节点,减少切负荷动作的发生。最后,利用极大值法将多目标优化问题转化为单目标优化问题,降低模型求解难度。116节点实际等值系统的算例测试表明,所述安全校正模型可利用最少的调整设备和调整量,消除系统过载故障。UPFC参与调控可提高系统安全校正效率。
New topology of unified power flow controller(UPFC)connected to different buses on shunt side and series side makes the traditional steady-state model of UPFC difficult to apply.Sensitivity-based security correction method ignores the effect of reactive power and may introduce new insecurity factors.Based on this,a steady-state UPFC model with high adaptability is proposed,along with an optimization model for power flow calculation with UPFC.Then,considering the influence of reactive power,a variable of 0-1 is introduced to transform the security correction problem into a multi-objective optimization problem with the objective of minimizing the number of adjusting devices and the amount of adjusting.Furthermore,the generator nodes and load nodes are distinguished by weights to reduce the occurrence of load shedding.Finally,the multi-objective optimization problem is transformed into a single-objective optimization problem by using the maximum method,which decreases the solving difficulty of the model.The test results of 116-bus equivalent system show that the proposed security correction model can eliminate the overload fault of the system by using the least adjusting equipment and adjusting amount,and the UPFC can improve the efficiency of the security correction.
New topology of unified power flow controller(UPFC)connected to different buses on shunt side and series side makes the traditional steady-state model of UPFC difficult to apply.Sensitivity-based security correction method ignores the effect of reactive power and may introduce new insecurity factors.Based on this,a steady-state UPFC model with high adaptability is proposed,along with an optimization model for power flow calculation with UPFC.Then,considering the influence of reactive power,a variable of 0-1 is introduced to transform the security correction problem into a multi-objective optimization problem with the objective of minimizing the number of adjusting devices and the amount of adjusting.Furthermore,the generator nodes and load nodes are distinguished by weights to reduce the occurrence of load shedding.Finally,the multi-objective optimization problem is transformed into a single-objective optimization problem by using the maximum method,which decreases the solving difficulty of the model.The test results of 116-bus equivalent system show that the proposed security correction model can eliminate the overload fault of the system by using the least adjusting equipment and adjusting amount,and the UPFC can improve the efficiency of the security correction.
引文
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[16]李鹏,林金娇,孔祥平,等.统一潮流控制器在苏南500kV电网中的应用[J].电力工程技术,2017,36(1):20-24.LI Peng,LIN Jinjiao,KONG Xiangping,et al.Application of UPFC in the 500 kV southern power grid of Suzhou[J].Electric Power Engineering Technology,2017,36(1):20-24.
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[20]国网江苏省电力公司.统一潮流控制器技术及应用[M].北京:中国电力出版社,2015:199-207.State Grid Jiangsu Electric Power Co Ltd.Technology and application of unified power flow controller[M].Beijing:China Electric Power Press,2015:199-207.
[2]宋鹏程,徐政,窦飞,等.统一潮流控制器选址定容的关键影响因素分析及优化方法[J].电力系统自动化,2017,41(13):168-175.DOI:10.7500/AEPS20161019006.SONG Pengcheng,XU Zheng,DOU Fei,et al.Critical factor analysis and optimization method for placement and sizing of unified power flow controller[J].Automation of Electric Power Systems,2017,41(13):168-175.DOI:10.7500/AEPS20161019006.
[3]张晓宇,顾乔根,文继锋,等.统一潮流控制器系统串联变压器保护设计[J].电力系统自动化,2017,41(17):72-77.DOI:10.7500/AEPS20170208002.ZHANG Xiaoyu,GU Qiaogen,WEN Jifeng,et al.Transformer protection design in unified power flow controller system[J].Automation of Electric Power Systems,2017,41(17):72-77.DOI:10.7500/AEPS20170208002.
[4]国网江苏省电力公司.统一潮流控制器工程实践---南京西环网统一潮流控制器示范工程[M].北京:中国电力出版社,2015:15-20.State Grid Jiangsu Electric Power Company.Engineering practice of unified power flow controller-demonstration project of UPFC in west loop power grid of Nanjing[M].Beijing:China Electric Power Press,2015:15-20.
[5]赵渊,杨晓嵩,谢开贵.UPFC对电网可靠性的灵敏度分析及优化配置[J].电力系统自动化,2012,36(1):55-60.ZHAO Yuan,YANG Xiaosong,XIE Kaigui.Parameter sensitivity and optimal allocation of UPFCs in bulk power systems reliability assessment[J].Automation of Electric Power Systems,2012,36(1):55-60.
[6]杨健,宋鹏程,徐政.适用于新型UPFC拓扑的电力系统潮流计算方法[J].电网技术,2017,41(3):888-894.YANG Jian,SONG Pengcheng,XU Zheng.A load flow calculation method for power systems with novel UPFCtopology[J].Power System Technology,2017,41(3):888-894.
[7]CASTRO C A,BOSE A.Correctability in online contingency analysis[J].IEEE Transactions on Power Systems,2002,8(3):807-814.
[8]任建文,何培成,何宸.基于虚拟控制单元与启发式搜索的线路过载紧急控制策略[J].电力系统自动化,2017,41(3):33-38.DOI:10.7500/AEPS20160528004.REN Jianwen,HE Peicheng,HE Chen.Emergency control strategy against line over-load based on virtual control units and heuristic search[J].Automation of Electric Power Systems,2017,41(3):33-38.DOI:10.7500/AEPS20160528004.
[9]岳贤龙,王涛,顾雪平,等.基于灵敏度和潮流熵的线路过负荷控制策略[J].电力系统保护与控制,2017,45(21):58-66.YUE Xianlong,WANG Tao,GU Xueping,et al.Control strategy for line overload based on sensitivity and power flow entropy[J].Power System Protection and Control,2017,45(21):58-66.
[10]徐岩,郅静.基于功率灵敏度的线路过载划区域紧急控制策略[J].电工技术学报,2015,30(15):60-72.XU Yan,ZHI Jing.A zone-divided emergency control strategy for overload lines based on power sensitivity[J].Transactions of China Electrotechnical Society,2015,30(15):60-72.
[11]程临燕,郝治国,张保会,等.基于内点法消除输电断面过载的实时控制算法[J].电力系统自动化,2011,35(17):51-55.CHENG Linyan,HAO Zhiguo,ZHANG Baohui,et al.Fast elimination of overload in transmission line section based on simplified primal-dual interior point method[J].Automation of Electric Power Systems,2011,35(17):51-55.
[12]ESFAHANI M,YOUSEFI G.Real time congestion management in power systems considering quasi-dynamic thermal rating and congestion clearing time[J].IEEETransactions on Industrial Informatics,2016,12(2):745-754.
[13]赵晋泉,江晓东,张伯明.一种基于连续线性规划技术的在线静态安全校正算法[J].电网技术,2005,29(5):25-30.ZHAO Jinquan,JIANG Xiaodong,ZHANG Boming.Asuccessive linear programming based on-line static security corrective control approach[J].Power System Technology,2005,29(5):25-30.
[14]REDDY S.Multi-objective based congestion management using generation rescheduling and load shedding[J].IEEETransactions on Power Systems,2017,32(2):852-863.
[15]顾雪平,张尚,王涛,等.安全域视角下的有功安全校正优化控制方法[J].电力系统自动化,2017,41(18):17-24.DOI:10.7500/AEPS20170330002.GU Xueping,ZHANG Shang,WANG Tao,et al.Optimization control strategy for active power correction from perspective of security region[J].Automation of Electric Power Systems,2017,41(18):17-24.DOI:10.7500/AEPS20170330002.
[16]李鹏,林金娇,孔祥平,等.统一潮流控制器在苏南500kV电网中的应用[J].电力工程技术,2017,36(1):20-24.LI Peng,LIN Jinjiao,KONG Xiangping,et al.Application of UPFC in the 500 kV southern power grid of Suzhou[J].Electric Power Engineering Technology,2017,36(1):20-24.
[17]谢海鹏,何剑,别朝红,等.基于二阶锥切负荷模型的大规模交直流混联电网可靠性评估[J].电网技术,2016,40(12):3761-3767.XIE Haipeng,HE Jian,BIE Zhaohong,et al.Reliability evaluation of large-scale hybrid AC/DC grids based on SOCPload shedding model[J].Power System Technology,2016,40(12):3761-3767.
[18]魏传江.GAMS用户指南[M].北京:中国水利水电出版社,2009.WEI Chuanjiang.User guide of GAMS[M].Beijing:China Water&Power Press,2009.
[19]周玲,王宽,钱科军,等.计及UPFC的电力系统无功优化[J].中国电机工程学报,2008,28(4):37-41.ZHOU Ling,WANG Kuan,QIAN Kejun,et al.Power system reactive power optimization considering UPFCinstallation[J].Proceedings of the CSEE,2008,28(4):37-41.
[20]国网江苏省电力公司.统一潮流控制器技术及应用[M].北京:中国电力出版社,2015:199-207.State Grid Jiangsu Electric Power Co Ltd.Technology and application of unified power flow controller[M].Beijing:China Electric Power Press,2015:199-207.