电力系统动态无功优化调度的调节代价

Readjusting Cost of Dynamic Optimal Reactive Power Dispatch of Power Systems

提出了电力系统动态无功优化调度中控制设备调节代价的数学模型，并探讨了其作用。进行无功优化调度需增加相关设备的投资及运行维护工作量，同时增大了系统故障的概率，因此无功优化调度的目标仅考虑网损最小而不考虑为了降损进行的操作的调节代价是欠妥当的。通过仿真算例表明，将控制设备的调节代价引入无功优化调度的目标函数中，使无功优化调度在降低网损和减少控制设备操作之间达到平衡。由于在无功优化调度中能够避免控制设备的频繁操作，从而证明了该模型的合理性。

A mathematical model of readjusting cost of control devices is presented and its effects on dynamic optimal reactive power dispatch (ORPD) for power systems are studied. Since the operation of reactive power dispatch will increase the investment of relative devices and maintenance loads and augment the fault probability of power systems, it is not felicitous that just minimizing the power loss without taking the readjusting costs into account in the objective function of ORPD. Results of a simulation test demonstrate that the introduction of readjusting costs of control devices to the objective function of optimal reactive power dispatch can keep a balance between cutting of the power losses and reducing of the operation times. The proposed model is reasonable since it can avoid excessive readjustment of control devices in the reactive power dispatch.