机电暂态仿真中直流输电系统恢复特性曲线修正方法
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摘要
针对当前机电暂态仿真中直流输电系统对交流侧不对称故障计算结果误差较大的问题,提出一种数据驱动的机电直流输电系统恢复特性曲线修正方法。利用机电-电磁混合仿真获取特性曲线并对其进行截取、无扰动不平校验和归一化等预处理从而构造恢复特性样本库。基于流形假设提出了基于优先级的近邻搜索,即利用待修正样本的仿真数据特征量在样本库中得到近邻样本。根据受限动态时间规整算法提出近邻样本曲线融合算法。综合上述研究成果,完成直流系统恢复特性曲线修正方案。实际电网算例仿真结果表明,所提方案能有效实现修正,为机电暂态仿真中直流输电系统的处理提供新的思路。
Aiming at the problem that the high voltage direct current(HVDC) system has a large calculation error in electro-mechanical transient simulation when the asymmetry fault occurs on the AC side, a method of revising the electro-mechanical recovery characteristic curve of the HVDC transmission system driven by data is proposed. The recovery characteristic curve is obtained by electro-mechanical and electromagnetic hybrid simulation and be pre-processed through interception, numerical stability check and normalization, to construct the recovery characteristic curve sample library. Based on the assumption of the manifold, a neighbor search based on priority is proposed, which uses the simulated data feature quantity of the uncorrected sample to get the neighbor sample in the sample library. A near neighbor sample curve fusion algorithm is proposed based on the restricted dynamic time warping algorithm. Based on the above research results, the HVDC system recovery characteristic curve correction scheme is completed. The simulation results show that the proposed scheme can effectively correct and provide innovative ideas for the processing of HVDC system in electro-mechanical transient simulation.
Aiming at the problem that the high voltage direct current(HVDC) system has a large calculation error in electro-mechanical transient simulation when the asymmetry fault occurs on the AC side, a method of revising the electro-mechanical recovery characteristic curve of the HVDC transmission system driven by data is proposed. The recovery characteristic curve is obtained by electro-mechanical and electromagnetic hybrid simulation and be pre-processed through interception, numerical stability check and normalization, to construct the recovery characteristic curve sample library. Based on the assumption of the manifold, a neighbor search based on priority is proposed, which uses the simulated data feature quantity of the uncorrected sample to get the neighbor sample in the sample library. A near neighbor sample curve fusion algorithm is proposed based on the restricted dynamic time warping algorithm. Based on the above research results, the HVDC system recovery characteristic curve correction scheme is completed. The simulation results show that the proposed scheme can effectively correct and provide innovative ideas for the processing of HVDC system in electro-mechanical transient simulation.
引文
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[14]刘凤魁,邓春宇,王新迎.基于小波变换和改进快速密度峰值聚类算法的负荷曲线聚类研究[J].电力信息与通信技术,2017,15(3):55-61.LIU Feng-kui,DENG Chun-yu,WANG Xin-ying.Study on load curve clustering based on wavelet transform and improved density peaks clustering algorithm[J].Electric Power Information and Communication Technology,2017,15(3):55-61.
[15]GUO X,YUN T,QI L,et al.Anovelsemi-supervised dimensionality reduction framework for multi-manifold learning[J].IEEE Multimedia,2015,23(2):28-41.
[16]耿俊成,吴博,万迪明,等.基于离群点检测的低压配电网拓扑结构校验[J].电力信息与通信技术,2017,15(5):61-65.GENG Jun-cheng,WU Bo,WAN Di-ming,et al.Low-voltage transformer area topology verification based on outlier detection[J].Electric Power Information and Communication Technology,2017,15(5):61-65.
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[2]郑超,盛灿辉,林俊杰,等.特高压直流输电系统动态响应对受端交流电网故障恢复特性的影响[J].高电压技术,2013,39(3):555-561.ZHENG Chao,SHENG Can-hui,LIN Jun-jie,et al.Influence of UHVDC transmission system dynamic response on ac receiving end’s failure recovery characteristics[J].High Voltage Engineering,2013,39(3):555-561.
[3]杨洋,肖湘宁,廖坤玉,等.机电-电磁暂态混合仿真多端口模型的比较分析[J].电力系统自动化,2017,41(7):127-134.YANG Yang,XIAO Xiang-ning,LIAO Kun-yu,et al.Comparative analysis of multi-port model for electromechanicalelectromagnetic transient hybrid simulation[J].Automation of Electric Power Systems,2017,41(7):127-134.
[4]许烽,翁华,徐政,等.基于PSCAD/EMTDC的大规模交直流系统快速建模及有效性分析[J].高电压技术,2013,39(11):2762-2772.XU Feng,WENG Hua,XU Zheng,et al.Rapid modeling and validity analysis of large-scale AC/DC power systems based on PSCAD/EMTDC[J].High Voltage Engineering,2013,39(11):2762-2772.
[5]朱旭凯,周孝信,田芳,等.基于电力系统全数字实时仿真装置的大电网机电暂态-电磁暂态混合仿真[J].电网技术,2011,35(3):26-31.ZHU Xu-kai,ZHOU Xiao-xin,TIAN Fang,et al.Hybrid electromechanical-electromagnetic simulation to transient process of large-scale power grid on the basis of ADPSS[J].Power System Technology,2011,35(3):26-31.
[6]ZHU H,CAI Z,LIU H,et al.Hybrid-model transient stability simulation using dynamic phasors based HVDC system model[J].Electric Power Systems Research,2006,76(6-7):582-591.
[7]王钢,李志铿,李海锋,等.交直流系统的换流器动态相量模型[J].中国电机工程学报,2010,30(1):59-64.WANG Gang,LI Zhi-keng,LI Hai-feng,et al.Dynamic phasor model of the converter of the AC/DC system[J].Proceedings of the CSEE,2010,30(1):59-64.
[8]岳程燕,田芳,周孝信,等.电力系统电磁暂态-机电暂态混合仿真接口原理[J].电网技术,2006,30(1):23-27.YUE Cheng-yan,TIAN Fang,ZHOU Xiao-xin,et al.Principle of interfaces for hybrid simulation of power system electromagnetic-electromechanical transient process[J].Power System Technology,2006,30(1):23-27.
[9]刘文焯,侯俊贤,汤涌,等.考虑不对称故障的机电暂态-电磁暂态混合仿真方法[J].中国电机工程学报,2010,30(13):8-15.L I U We n-z h u o,H O U J u n-x i a n,TA N G Yo n g,e t a l.Electromechanical transient/electromagnetic transient hybrid simulation method considering asymmetric faults[J].Proceedings of the CSEE,2010,30(13):8-15.
[10]徐政,蔡晔,刘国平.大规模交直流电力系统仿真计算的相关问题[J].电力系统自动化,2002,26(15):4-8.XU Zheng,CAI Ye,LIU Guo-ping.Some problems in the simulation of large-scale AC/DC power systems[J].Automation of Electric Power Systems,2002,26(15):4-8.
[11]洪潮.直流输电系统换相失败和功率恢复特性的工程实例仿真分析[J].南方电网技术,2011,5(1):1-7.HONG Chao.Simulation analysis on the commutation failure and power recovery characteristic of an actual DC transmission system[J].Southern Power System Technology,2011,5(1):1-7.
[12]中国电力科学研究院.PSASP7.1动态元件库用户手册[Z].2015.
[13]郭小江,郭剑波,王成山.考虑直流输电系统外特性影响的多直流馈入短路比实用计算方法[J].中国电机工程学报,2015,35(9):2143-2151.GUO Xiao-jiang,GUO Jian-bo,WANG Cheng-shan.Practical calculation method for multi-infeed short circuit ratio influenced by characteristics of external characteristics of DC system[J].Proceedings of the CSEE,2015,35(9):2143-2151.
[14]刘凤魁,邓春宇,王新迎.基于小波变换和改进快速密度峰值聚类算法的负荷曲线聚类研究[J].电力信息与通信技术,2017,15(3):55-61.LIU Feng-kui,DENG Chun-yu,WANG Xin-ying.Study on load curve clustering based on wavelet transform and improved density peaks clustering algorithm[J].Electric Power Information and Communication Technology,2017,15(3):55-61.
[15]GUO X,YUN T,QI L,et al.Anovelsemi-supervised dimensionality reduction framework for multi-manifold learning[J].IEEE Multimedia,2015,23(2):28-41.
[16]耿俊成,吴博,万迪明,等.基于离群点检测的低压配电网拓扑结构校验[J].电力信息与通信技术,2017,15(5):61-65.GENG Jun-cheng,WU Bo,WAN Di-ming,et al.Low-voltage transformer area topology verification based on outlier detection[J].Electric Power Information and Communication Technology,2017,15(5):61-65.
[17]SAKOE H,CHIBA S.Dynamic programming algorithm optimization for spoken word recognition[J].IEEE Transactions on Acoustics Speech&Signal Processing,1978,26(1):43-49.