摘要
区域电网频率控制系统在应对多直流馈入引发电网频率稳定问题中发挥着重要作用,频率控制系统动作的快速性、准确性很大程度依赖于直流协调控制功能。介绍了直流控制系统与频率控制系统的接口方式,设计了合理的接口数据处理方法。针对频率控制系统存在无法准确判别直流功率回降量的问题,提出了直流功率损失判断准确性提升方法。为改善直流执行频率控制系统调制命令的准确性和可靠性,提出了调制功率补偿方法和换相失败延时调制方法。最后通过实时数字仿真(RTDS)验证了所提方法的正确性和有效性,为后续特高压直流协调控制功能的应用提供了参考。
The frequency emergency coordination control system plays an important role in dealing with the frequency stabilityproblem of power systems caused by multiinfeed HVDC systems. However,the rapidity and accuracy of the coordinated controlsystem largely depends on the DC coordinated control function. Firstly this paper introduced the interface between DC controlsystem and coordinated control system,and interface data processing method was appropriately designed. Then a new DC powerfast decreasing control method was proposed to solve the problem that the coordinated control system cannot distinguish thedecrease of DC power under the current control method. A modulation power compensation method and a commutation failuredelay modulation method were also proposed to improve the accuracy and reliability during the implementation of modulationcontrol. Finally,the correctness of the functions was verified by RTDS simulation test,which provides reference for theapplication of the UHVDC coordinated control function.
作者
刘凯
张庆武
侍乔明
LIU Kai;ZHANG Qingwu;SHI Qiaoming(NR Electric Co.,Ltd.,Nanjing 211102,China)
出处
《电力工程技术》
2018年第4期14-20,共7页
Electric Power Engineering Technology
基金
国家重点研发计划资助项目(2016YFB0900602)
关键词
特高压直流
协调控制
调制功率补偿
换相失败
UHVDC
coordinated control
modulation power compensation
commutation failure
