采用模糊规则的风机超速区变参数综合惯性控制方法

Variable Parameter Integrated Inertial Control Method of Wind Generator Overspeed Zone Using Fuzzy Rules

对风机参与电力系统调频的控制策略进行研究,提出一种基于模糊规则的风机超速区变参数综合惯性控制方法.首先,分析风机传统综合惯性控制方法,针对电网频率的二次跌落问题,对风机超速状态下的惯性响应特性进行研究,使风机具有更好的转速恢复能力;然后,针对风机实际运行状态与惯性控制系统参数间的动态匹配问题,以频率差值和频率变化率为考量标准,制定模糊规则,实现风机惯性控制更优的动态响应,并进一步减小电网频率的二次跌落.仿真实验表明:文中方法具有可行性和有效性.

The control strategy of wind turbine participating in power system frequency regulation is studied.A variable parameter integrated inertial control method of a wind generator in overspeed zone based on fuzzy rules is proposed.Firstly,the traditional integrated inertial control method of wind turbine is analyzed.Aiming at the second drop of grid frequency,the inertia response characteristics of wind turbine under overspeed condition are studied,so that the wind turbine has better speed recovery ability.Then,aiming at the dynamic matching problem between the actual operation state of the wind turbine and the parameters of the inertial control system,the fuzzy rules are formulated based on the criteria of the amplitude and rate of frequency fluctuation,which can achieve better dynamic response of the wind turbine inertial control and further reduce the secondary drop of the grid frequency.Simulation experimental results show that the proposed method is feasible and effective.