基于多代理的紧急直流功率支援策略研究

A Multi-Agent Based Emergency DC Power Support Strategy

利用直流进行紧急功率支援对单直流系统有一定控制效果,但其缺乏考虑后续阻尼以及电压波动等因素。尤其对于多馈入直流输电系统,该方法则因缺乏协调控制而有一定局限性。为此,提出一种考虑上述因素的多目标紧急协调控制新方法,基于多代理系统(multi-agent system,MAS)技术设计了紧急直流功率支援的控制系统,并详细分析了3个主要Agent控制的实现方式。在紧急控制Agent中定义了紧急功率支援指标,以量化直流系统紧急提升最小量;在附加信号调节Agent中通过挖掘最佳控制敏感点进行直流附加控制;在逆变站无功调节Agent中定义了电压敏感点指标,以筛选多直流中电压最为敏感的直流逆变站进行无功调节。最后在考虑通信延迟的条件下以某多直流馈入系统为对象进行仿真,结果证明了所提协调控制方法的有效性。

There is a certain control effect for single HVDC transmission system to utilize DC power for emergency power support, however in this emergency power support strategy the subsequent damping and voltage fluctuation are not considered, especially for multi-infeed HVDC transmission system this strategy has certain limitation for lack of coordinated control. A multi-objective coordinated emergency control method, in which above-mentioned factors are considered, is proposed. Based on multi-agent system technology a control system for emergency DC power support is designed, and the implementation of three main agent controls is analyzed in depth. In emergency control agent the emergency power support index is defined to quantify the minimum emergency lifting quantity of HVDC transmission system; in the additional signal modulation agent through mining the point sensitive to optimum control the additional DC control is performed;in the reactive power control agent of inverter station the index of voltage sensitive point is defined to find out the inverter station most sensitive to voltage in the multi-infeed HVDC system to regulate reactive power. Finally, considering the communication delay and taking a certain multi-infeed HVDC transmission system as simulation object, the effectiveness of the proposed coordinated emergency control method is validated by simulation results.