风电场层AGC常用分配策略的对比研究

风电场层AGC负责接收、分配和下发系统调度有功指令目标值至场内各机组，其中分配策略将直接影响风电场AGC的控制性能。目前常用的分配策略有有功变化量平均分配、有功等比分配和相似出力裕度分配。从机组台数、限电量和可用理论有功计算误差等方面分别比较了三种常用分配策略对风电场AGC响应时间的影响。结果表明，机组台数和限电量对风电场AGC响应时间的影响很小，但可用理论有功计算误差有可能导致系统调度下发的有功指令目标值经风电场层AGC分配、下发，再经机组层AGC执行后仍无法进入调节死区，需二次分配，增长了风电场AGC的响应时间。该研究将为风电场AGC控制性能的改善提供技术依据。

Comparative study of the popular distribution strategies for the wind farm layer AGC

The wind farm layer Automatic Generation Control (AGC) is responsible for receiving, distributing and sending the active command target value distributed by the power system dispatching to the wind turbines, and the distribution strategy will directly affect the control performance of the wind farm AGC. At present, the popular distribution strategies include the active power variation average distribution, the active power equal distribution, and the similar margin distribution. In this paper, the effects of three popular distribution strategies on the wind farm AGC response time are compared from the aspects of the wind turbine number, the electricity limit and the available theoretical active calculation error. The results show the influences of the wind turbine number and the electricity limit on the wind farm AGC response time are small, but the available theoretical active calculation error may increase the response time since the active command target value distributed by the power system dispatching is distributed and sent to the wind farm layer AGC, and then operated by the wind turbine layer AGC, is still unable to enter the regulating dead zone, and needs the second distribution. The paper will provide technical basis for improving the control performance of the wind farm AGC. This work is supported by National Natural Science Foundation of China (No. U1510112).