基于边际价格理论,提出考虑系统电压安全风险的无功定价数学模型。该模型不但隐含了系统静态电压稳定性的信息,也反映了将系统从当前的暂态电压不安全的状态引导到安全的要求。通过满足暂态电压安全约束的无功发电调节与切负荷总代价最小化问题,来表示暂态电压安全风险。仿真算例表明该方法能较好地引导用户,有利于电压稳定性。 Based on the marginal price theory, a mathematic model of reactive power pricing considering system voltage safety risk is proposed. The model not only implies the static voltage stability of the system information, but also reflects the system from the current transient voltage unsafe to guide the security requirements. The transient voltage safety risk is represented by minimizing the total reactive power regulation and the total load shedding of transient voltage safety constraints. Simulation results show that this method can guide the user well and is good for voltage stability.