风火打捆经串补外送系统次同步振荡分析及抑制策略研究  

Analysis and Suppression Strategy of Sub-synchronous Oscillation for Wind-thermal-bundled Power Transmitted by Series-compensated System

作　　者：张育硕 郝丽丽 周彦彤 李威[2] 汪成根 ZHANG Yushuo;HAO Lili;ZHOU Yantong;LI Wei;WANG Chenggen(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,China;Nari Technology Development Limited Company,Nanjing 211106,China;Jiangsu Electric Power Company Electric Research Institute,Nanjing 211103,China)

机构地区：[1]南京工业大学电气工程与控制科学学院,南京211816 [2]国电南瑞科技股份有限公司,南京211106 [3]江苏省电力公司电力科学研究院,南京211103

出　　处：《电力电容器与无功补偿》2019年第6期189-195,共7页Power Capacitor & Reactive Power Compensation

基　　金：国网江苏省电力公司科技项目资助(J2017046);江苏省“六大人才高峰”项目资助(XNY-020);智能电网保护和运行控制国家重点实验室资助

摘　　要：在风火打捆通过串补外送系统中,大容量风电场的并入可能会使发电机组轴系扭振的风险增加,因此需要对风火打捆经过串联补偿外送系统的次同步振荡分析及抑制策略进行研究。本文首先分析了静止同步补偿器(STATCOM)的控制策略,然后研究了STATCOM附加阻尼控制产生电磁转矩增量的机理,并且设计了次同步振荡阻尼控制器,最后在DIgSILENT/PowerFactory仿真平台上研究风电场并网前后和不同线路串补度对系统阻尼的影响,并用复转矩系数法、时域仿真法验证了STATCOM的加入对系统电气阻尼的影响及其对次同步振荡的抑制效果。The connection of large-capacity wind farms may increase the risk of torsional vibration of turbine generator shafts in the wind-thermal-bundled power transmitted by series-compensated system,therefore the analysis and suppression strategy of sub-synchronous oscillation(SSO)in such system needs to be thoroughly studied.Firstly,the control strategy of static synchronous compensator(STATCOM)is analyzed,then the mechanism of electromagnetic torque increment produced by additional damping control of STATCOM is studied and a SSO damping controller is designed.Finally,the influence of wind power integration and series compensation degreeon system damping is studied on DIgSILENT/PowerFactory simulation platform.The result of STATCOM on the electrical damping of the system and its suppression effect on the sub-synchronous oscillation is verified by complex torque coefficient approach and time-domain simulation approach.

关 键 词：风火打捆 静止同步补偿器 附加阻尼控制 复转矩系数法 时域仿真法 

分 类 号：TM7[电气工程—电力系统及自动化]