摘要
作为级联静止同步补偿器(STATCOM)最重要的部分——级联阀组,要想得到性能良好、可靠性高的装置,必须运用合适的控制策略对其进行严格测试。提出一种级联静止同步补偿器(STATCOM)的级联阀组运行控制策略,给出连接电抗器详细的设计方法;同时,借鉴微电网的孤岛控制思想,该控制策略为系统提供了必备的电压和频率支撑;采用直流侧电压控制和系统级无功控制构成的双闭环控制策略,保证了直流侧电压稳定,并实现链节间的无功功率交换。在PSCAD/EMTDC中搭建与实际控制系统结构一致的仿真模型,验证了控制策略的正确性和可行性。
The cascade valve group,as the most important part of static synchronous generator（STATCOM）,should be strictly tested to obtain high performance and high reliability using an appropriate control strategy.A control strategy of the cascade valve group was proposed in this paper,and a detailed design method of the connection reactor was also presented.Same as the micro-grid islanding control method,the control strategy provided the necessary support for power grid voltage and frequency.Through double closed-loop control strategy of voltage control at DC side and reactive power control at system side,the DC side voltage stability was guaranteed.And the reactive power exchange between each links was realized.Finally,the simulation model consistent with the actual control power system was built in PSCAD/EMTDC,which verifies the correctness and feasibility of the proposed control strategy.
出处
《电力科学与技术学报》
CAS
北大核心
2015年第3期91-96,共6页
Journal of Electric Power Science And Technology
