综合多类型措施的频率紧急协调优化控制研究

Coordinated optimization method for frequency safety emergency control strategy with multi-type control measures

随着电网精益化运行要求的提高,直流紧急功率支援、发电出力快速升降、负荷控制等连续调节型控制技术在当今电网运行控制中得到越来越多的关注。针对我国新能源及跨区特高压直流规模不断扩大形势下电网面临的频率突出问题,分析了故障后暂态频率安全特性及控制需求,计及各类控制措施响应特性、控制代价及暂态频率安全裕度量化指标,制定了多类型控制措施的协调配合原则和思路,提出了一种综合多类型措施的频率紧急协调优化控制决策方法。在保证电网频率安全的前提下,通过协调连续和离散控制措施,降低电网故障后频率控制代价,适应了现代电网精益化频率稳定控制要求。基于实际规划特高压直流送端电网,仿真验证了所提方法的可行性。

With the improvement of lean operation demand of power grid,continuous regulation control technologies such as direct current emergency power support,rapid power generation,and load control have received more and more attention in the current power grid operation control.In view of frequency problem under increasing scale of new energy and ultra high voltage direct current(UHVDC),control requirements for different stages of frequency after the fault are analyzed.Then coordination principle and frequency emergency coordination optimization control measures which consider response characteristics,cost,as well as quantitative index of transient frequency security margin are proposed.The cost of frequency control after fault is reduced through coordination of continuous and discrete control measures which also meets the requirement of modern power grid optimization frequency control.Based on actual UHVDC sending-network,feasibility of the proposed method is verified.