摘要
直流输电容量的不断提高,在一定程度上增大了多直流馈入受端电网频率安全风险。分析故障后动态频率变化典型特征,结合频率安全控制目标,提出两段式频率安全紧急控制策略。第一阶段以故障后动态过程最低频率满足要求作为目标制定控制策略,第二阶段以故障后稳态频率满足要求作为目标制定控制策略。结合多直流馈入受端电网中频率安全紧急控制资源的特点,研究分析两段式频率安全紧急控制策略制定问题,提出制定控制策略的基本原则、步骤和需要的关键信息。用实际电网数据,仿真分析两段式紧急控制策略的效果。研究结果表明,两段式紧急控制策略能够实现故障后全过程频率紧急控制控制目标的协同。
The steady increasing of HVDC transmission capacity increases, to some extent, the risks of frequency security in multi-infeed HVDC receiving systems. Based on an analysis of the typical characteristics of dynamic frequency caused by contingencies, a two-stage fi＇equency security emergency control strategy is presented in view of the goal of frequency security control. The control strategy of first stage is determined according to the requirement of the lowest frequency during dynamic process after contingency. The control strategy of second stage is determined according to the requirement of the steady state frequency. Considering the characteristics of frequency security control resource in rnuhi-infeed HVDC receiving systems, the paper addresses the problems in establishing two-stage frequency security emergency control strategy, and the basic principle, procedures and key information for establishing the control strategy are presented. Based on a real power grid, the effect of two-stage frequency security emergency control strategy is simulated. It is shown by this study that two-stage frequeney security emergency control strategy can be used to coordinate the control requirements of the lowest frequency and the steady state frequency after contingency.
出处
《中国电力》
CSCD
北大核心
2017年第2期169-174,180,共7页
Electric Power
基金
国家电网公司科技资助项目(改善系统频率稳定性的跨区多直流功率紧急支援协控系统关键技术研究)~~
关键词
多直流馈入
频率安全
紧急控制
受端电网
multi-infeed HVDC
frequency security
emergency control
receiving systems
