基于系统等值的电压控制方法

Voltage control based on power system equivalent model

利用电力网络两母线等值模型进行电压控制方法的研究,通过控制系统等值电势实现系统电压协调控制。基于此构建电压控制问题的模型及控制策略,并给出了电压稳定在线预警及控制系统的结构。该方法在线监视系统电压稳定性并选择较危险的节点,同时能获得各电压源点对危险节点等值电势影响的大小,与电压控制节点剩余控制能力相结合来选择合理的电压控制节点,并通过在线求解简单的优化问题获得控制量。基于典型系统的仿真结果表明,该方法能充分利用系统中的电压支撑能力,提高系统电压稳定性。

Voltage control is studied with the two-bus equivalent model of power system and the cooperative control of system voltage is realized by the equivalent potential of control system,based on which the model and strategy of voltage control are established and the structure of the online voltage stability warning and control system is presented.It online monitors the voltage stability,selects some critical nodes,evaluates the impacts of voltage source nodes on them,decides the voltage control nodes by considering their remaining voltage control capability,and online solves a simple optimization problem to get the control input.Simulative results for typical systems demonstrate that the proposed strategy makes full use of voltage control capability in power system to improve system voltage stability.