光伏并网附加控制抑制交流串补引起的次同步谐振  

Supplementary photovoltaic grid-connection control for damping SSR induced by series capacitive compensation

作　　者：陈实[1] 李兴源[1] 李宽 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]国网山东省电力公司电力科学研究院,山东济南250002

出　　处：《电力自动化设备》2016年第1期24-29,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金重点资助项目(51037003)~~

摘　　要：高压交流串补有引发次同步谐振的风险,严重影响发电机组乃至整个电网的稳定运行。在光伏发电的基础上,研究通过光伏并网附加控制抑制交流串补引起的次同步谐振问题的可行性。基于复转矩系数思想设计一种次同步阻尼控制器加在光伏电站主控制器上,在保证光伏电站稳定并网的同时,抑制了交流串补引起的次同步谐振问题,很大程度提高了电网的稳定性与新能源并网效率。基于PSCAD/EMTDC仿真软件,以次同步IEEE第一标准模型作为仿真算例进行仿真验证,结果表明,相比STATCOM,通过在光伏电站并网附加阻尼控制器抑制次同步谐振的效果更好。The series capacitive compensation for high-voltage AC transmission may induce SSR（Sub Syn-chronous Resonance） and affect the stable operation of generator units and power grid. The feasibility of applying the supplementary photovoltaic grid-connection control to damp this SSR is researched. A supplementary SSDC（Sub Synchronous Damping Controller） is designed based on the complex torque coefficient approach,which is added to the main controller of photovoltaic power station to damp this SSR while the stable photovoltaic grid-connection is guaranteed. The stability of power grid and the grid-connection efficiency of new energy are greatly improved. As an example,the simulation based on PSCAD / EMTDC is carried out for the IEEE first benchmark model and the simulative results show that,the effectiveness of SSR restraint by SSDC is better than that by STATCOM.

关 键 词：光伏并网 串联电容补偿 次同步谐振 复转矩系数法 附加阻尼控制器 

分 类 号：TM615[电气工程—电力系统及自动化]