摘要
随着苏州南部电网500kV线路改造工程及10台300 MVA调相机工程的投运,该电网静/动态可靠性均得到了极大的提升,短路电流水平也随之提高。与此同时,苏州南部电网作为典型的大受端电网,其主要电源特高压锦苏直流具有季节性强的特点,导致电网存在直流换相失败风险大、直流双极闭锁后应急拉限电多等问题。加装500kV梅里—惠泉线路串联电抗器有效地控制了苏州南部电网500kV站点短路电流水平;500kV统一潮流控制器(unified power flow controller,UPFC)工程的投运显著提高了苏州南部电网对特高压交直流电网的承接能力和支撑作用。本文针对苏州南部电网在不同阶段的网架结构及UPFC发挥的作用,对串联电抗器的阻值选取进行了分析。在对串联电抗器与UPFC器协调优化的基础上,提出了既能满足短路电流控制需求,又能充分发挥UPFC潮流调节作用的串联电抗器安装阻值。
With the commissioning of500kV line-reconstructed project and10sets of300MVA phase modifiers in Suzhou southern power grid,both static/dynamic reliabilities of the grid have been improved greatly and,thereby,the short-circuit currents level has also improved.At the same time,Suzhou south-ern power grid,as typical big receiving grid,its main UHV Jinsu DC has such feature as strong season,which causing such problems as big risk of DC communication of power grid and multiple emergency power limit after DC bipolar lockout.Addition of500kV series reactor in Meili-Huiquan line can effectively con-trol the short circuit current level of500kV substation in Suzhou southern power grid.Operation of500kV unified power flow controller(UPFC)can improve significantly the undertaking capability and support func-tion of Suzhou southern power grid to UHV DC power grid.In this paper,as for the grid structure and of Su-zhou southern power grid at different stage and the function from UPFC,the resistance selection of series reactor is analyzed.On the base of coordination and optimization of series reactor and unified flow control-ler,the resistance of reactor not only meeting both the control requirement of short circuit current,but also making the flow regulation function of UPFA flow is proposed.
作者
蔡晖
张文嘉
吕翔
彭竹弈
祁万春
谢珍建
黄俊辉
CAI Hui;ZHANG Wenjia;LYU Xiang;PENG Zhuyi;QI Wanchun;XIE Zhenjian;HUANG Junhui(State Grid Jiangsu Economic Research Institute,Nanjing 210008,China;East China Electric Power Design Institute,Shanghai 200063,China)
出处
《电力电容器与无功补偿》
北大核心
2018年第6期119-123,共5页
Power Capacitor & Reactive Power Compensation
基金
国家电网公司科技项目<柔性输电网规划评估方法及应用关键技术研究>的支持
