时滞相关稳定性分析在电力系统中的应用

在日趋复杂的电力系统中,时滞现象的存在是电力系统不稳定的原因之一。为探讨时滞对电力系统稳定性的影响,针对电力系统中的经典模型单机无穷大系统,通过建模求得影响时滞的系统方程,并应用基于自由权矩阵积分不等式的时滞相关稳定条件获得了保证励磁控制系统稳定的时滞裕度。最后,通过实际模型证明了所提方法能有效地提高电力系统稳定性分析的时滞裕度。

Application of Delay-Dependent Stability Analysis in the Power System

Time-delay is one of the reasons accounting for the instability of the power system in the increasingly complex power system. A tentative discussion has been made of the effect of time delay on the stability of power system. In view of the classical model of single machine infinite bus system in power system, the system equation affecting the time delay can be obtained through modeling, followed by the acquisition of the delay margin stability of the excitation control system by using the delay dependent stability condition based on the free weight matrix integral inequality. Finally, the actual model verifies the efficiency of the proposed method in the improvement of the delay margin of power system stability analysis.