基于交流电路的临界电压崩溃特性分析

Characteristic analysis for critical voltage collapse based on alternating current circuit

针对电力系统电压崩溃问题,在简单电路的基础上,用更直观的方法对电压稳定性问题加以分析。分析交流电路的临界电压崩溃运行点,在求解交流电路的方程组过程中,采用了几何分析方法。分析得出在不同运行点情况下临界电压崩溃潮流的电流电压特性。通过分析不计电阻的交流电路临界电压崩溃时的负荷特性、电压特性,指出交流电路的工作域和崩溃域。同时分析指出,在电力系统的工作域中,交流电路的功率输送特性必须与负荷的功率特性相容。

To solve the problem of voltage collapse in power system, this paper analyzes voltage stability problem by more visualized method based on a single circuit model and the critical voltage collapse running point of alternating current circuit. The geometric analysis method is employed to solve equations set of alternating current circuit. The current-voltage characteristic of the critical voltage collapse power flow of different running point is abtained. By analyzing the load characteristic and voltage characteristic of the alternating current circuit with zero resistance, it divides the running zone and the collapse zone of alternating current circuit. Research shows that within the running zone of power system, the power transmitting characteristic of alternating current circuit must be consistent with the load power characteristic.