摘要
次同步振荡是常见的电力系统稳定性问题之一。为了抑制次同步振荡,可以投入次同步阻尼控制器(SSDC),根据其输出改变直流系统的有功功率指令值,从而为交流系统提供正阻尼,但直流系统一端有功功率的振荡部分会传递到另一端交流网络上。为了在直流系统中补偿功率振荡部分的能量,暂态解耦直流系统,引入模块化多电平换流器(MMC)的能量控制方法,通过控制MMC桥臂电容器的能量来保证另一端系统的稳定。本文基于IEEE次同步谐振第一标准测试系统,设计了SSDC系统的参数和MMC的能量补偿控制,并在PSCAD仿真平台上验证了SSDC和能量补偿控制的有效性。
Sub-synchronous oscillation is one of the common problems of the power system stability. To suppress this oscillation,SSDC( sub-synchronous damping controller) can apply positive damping to the AC system through changing the DC system power reference,but the power oscillation component in this terminal will be transmitted to other AC systems. In order to compensate the energy of the power oscillation component and decouple DC system transiently,the energy-based control of MMC( modular multilevel converter) is used to ensure other system’s stability by controlling the energy of MMC arm capacitors. Based on IEEE first benchmark model case for sub-synchronous resonance,this paper designs the SSDC with proper parameters and energy compensation control,and builds the simulation model on the PSCAD/EMTDC platform to verify the effectiveness of SSDC and energy compensation control.
作者
韩民晓
翟冬玲
郭抒颖
HAN Min-xiao;ZHAI Dong-ling;GUO Shu-ying(State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University, Beijing 102206, China)
出处
《电工电能新技术》
CSCD
北大核心
2019年第5期59-67,共9页
Advanced Technology of Electrical Engineering and Energy
基金
国家重点研发计划项目(2016YFB0900600)
国家留学基金委项目(201706730048)
