摘要
针对采用传统双闭环控制的静止同步补偿器(STATCOM)抑制电弧炉闪变能力不足的问题,本文通过对电弧炉配电网中的各个电压电流相量的分析,推导出一种能使电压波动量达到最小的补偿电流指令计算方法,然后根据电网侧瞬时功率与STATCOM装置的瞬时功率相等的原则,提出了一种基于瞬时功率平衡的STATCOM电压指令直接计算方法。这相对传统双闭环控制,STATCOM控制器省去3个PI调节器,响应时间也从原来的20ms减少到10ms,从而改善了其对电压闪变抑制能力。仿真试验和实际运行效果验证了本文所提出的控制策略的有效性和正确性。
Aimed at the insufficient capacity of mitigating electric arc furnaces（EAF） flicker problems for the traditional double-closed-loop control mode of static synchronous compensator （STATCOM）, this paper calculates the compensation current command which achieves the minimum voltage fluctuation by analyzing the various EAF distribution network voltage and current phasor, and directly calculates the control voltage command according to the principle of the network instantaneous power equal to the STATCOM instantaneous power. So the STATCOM controller is less three PI regulators than the traditional dual-loop control mode, and the response time from the original 20ms is reduced to 10ms, so it improves the ability of voltage flicker suppression. Simulation and actual operatin~ results verify that the orot）osed control strate^v in this naner is effective and correet.
出处
《电工技术学报》
EI
CSCD
北大核心
2012年第9期41-47,共7页
Transactions of China Electrotechnical Society
关键词
STATCOM
电弧炉
闪变
双闭环控制
直接电压控制
STATCOM, electric arc furnace, flicker, double double-closed-loop control, directvoltage control
