大量风电引入电网时的频率控制特性

Frequency Control Characteristics for a Power System with Large Amounts of Wind Power

大量风力发电引入电网时,会对电网的频率控制带来影响。在深入分析异步电动机频率特性的基础上,采用所开发的电力扰动装置对不同转矩特性的异步电动机的频率特性进行了测试。基于加权综合的思路建立了包含异步电动机的综合负荷的频率特性模型。同时分析了风力发电的出力特性。通过对一个包含风力发电的电网进行分析,论证了考虑负荷频率特性以后,在同样电网调频能力的情况下,频率波动的偏差会变小。

Frequency controls of an electric power system must be carefully studied when large amounts ot wind power is introduced. Based on the studies on the frequency characteristics of induction motors （IMs）, a voltage sourced interruption generator is developed for IM frequency characteristics studies with different torque-speed characteristics. A generalized IM model is synthesized using the weighted summation technique and wind power generators frequency characteristics are analyzed. Studies on a power system demonstrate that the system frequency deviation is smaller when the wind farms frequency control characteristics are taken into account than not.