基于无功辅助服务补偿的发电厂AVC系统机组无功出力分配策略

运行机组间无功出力分配是发电厂AVC系统的重要技术环节，分配策略的优劣影响着AVC控制的安全性及发电厂运行的经济性。从提高发电厂收益角度，提出了基于无功辅助服务补偿的发电厂AVC系统机组无功出力分配策略，建立了优化模型。该优化模型考虑了发电厂参与无功辅助服务后机组及变压器损耗增加的成本，在满足调度机构AVC系统下发的控制目标及机组安全运行等约束条件的前提下，以电厂收益最大为优化目标，求取参与AVC控制机组的无功出力控制量并下发相应机组执行。算例仿真验证了基于无功辅助服务补偿后发电厂运行机组间无功出力分配的有效性，能在满足调压要求的同时明显地提高电厂的经济效益。

A reactive power allocation strategy for power plant AVC system based on reactive power ancillary service compensation

The reactive power output allocation for generators is an important technical link of automatic voltage control (AVC) system in power plant. The allocation strategy affects the security of the AVC control and operation economy of power plant. In order to improve the profits of the power plant, a reactive power allocation strategy based on the reactive power ancillary services (RPAS) compensation is proposed, and the optimization model is established. The model considers the increasing cost of units and transformer loss when the power plant adopts the RPAS. Under the condition of satisfying the constraints such as the control target of AVC system of the dispatching department and secure operation domain of generators, and taking the maximum profits of power plant as the optimization objective, the model solves the controlling quantity of reactive outputs of AVC generators and then they are implemented by corresponding units. The method is proved to be effective in the simulation and the strategy can satisfy the requirements of voltage regulation and significantly improve the economic efficiency of the power plant.