能量视角下电力系统暂态频率问题初探

A Preliminary Exploration of Transient Frequency Issues in the Power System From an Energy Perspective

随着电力电子设备比例不断升高,电力系统暂态频率问题日益凸显。针对当前暂态频率安全判定条件不明确、低惯量条件下保证暂态频率安全的控制方法不清晰的问题,该文对暂态频率问题进行梳理,明确暂态频率问题本质,从能量角度出发给出暂态频率安全判定条件,并初步探究了能量视角下的暂态频率控制方法。首先,对暂态频率问题的组成及各部分的历史、本质和主要约束进行溯源,讨论其演变过程;辨析了惯量和一次调频的能量源、响应形式,从能量角度剖析两者的关系及相互作用,给出能量视角的暂态频率安全临界条件;最后讨论了能量视角的惯量能量和调频能量,初步探究了一次调频能量最优调用策略,给出一种暂态频率控制思路。

As the proportion of power electronic devices rises,the transient frequency issue in power systems is increasingly conspicuous.Aiming at the current problems of unclear determination conditions of transient frequency security and unclear control methods to ensure transient frequency security under low inertia conditions,this paper comprehends the transient frequency issue,clarifies the essence of transient frequency issue,gives the conditions of transient frequency security determination from the perspective of energy,and initially explores the control methods of transient frequency security from an energy viewpoint.Firstly,this paper retraces the historical development,essence,and primary constraints of transient frequency issues while discussing their evolution.It dissects the sources of energy and response forms in inertia and primary frequency control,analyzing their relationship and interactions from an energy perspective and establishing critical conditions for transient frequency security from an energy perspective.Finally,inertial energy and primary frequency regulation energy from the energy perspective are discussed,and the optimal strategy of primary frequency regulation energy is initially investigated,giving a transient frequency control idea.