基于模型预测的微电网频率协调控制策略

doi:10.16182/j.issn1004731x.joss.20-0298

摘要/Abstract

摘要： 针对风力发电接入微电网后产生的频率波动问题,提出了一种基于模型预测控制(model predictive control,MPC)的微电网频率协调控制策略,将风机和插电式混合动力汽车(plug-in hybrid electric vehicle,PHEV)纳入频率控制体系,通过对风机的浆距角与PHEV的充放电进行控制,来调节电网频率,对微电网的调频资源进行补充。对WTG桨距角控制系统与PHEV功率控制系统进行建模,阐述其控制原理。为了防止在调频过程中过多地使用PHEV,引入模型预测控制(model predictive control,MPC)理论,设计2个独立的MPC控制器来分别控制桨距角和PHEV功率输出。在MATLAB/simulink平台上验证了所提策略的有效性。结果表明：所提策略可以有效减小微电网的频率偏差和大型微电网中PHEV的用量,相比于传统PID控制具有更快的响应特性。

关键词: 微电网, 频率波动, 风力发电机, 模型预测控制, 插电式混合动力汽车

Abstract: Aiming at the problem of frequency fluctuation of wind power generation connected to microgrid, a frequency coordinated control strategy based on model predictive control (MPC) is proposed. In this strategy, the wind turbine and plug-in hybrid electric vehicle (PHEV) are included in the frequency control system. The pitch angle of the fan and the charge and discharge of PHEV are controlled to adjust the grid frequency and supplement the frequency modulation resources of microgrid. WTG pitch angle control system and PHEV power control system are modeled, and their control principles are described. In order to prevent excessive use of PHEV in the process of frequency modulation, the model predictive control (MPC) theory is introduced, and two independent MPC controllers are designed to control the pitch angle and the power output of PHEV respectively. The effectiveness of the proposed strategy is verified on MATLAB / simulink platform. The results show that the proposed strategy can effectively reduce the frequency deviation of microgrid and the amount of PHEV in large microgrid, and has faster response characteristics than the traditional PID control.

Key words: microgrid, frequency fluctuation, wind turbine generator, model predictive control, plug-in hybrid electric vehicle

中图分类号:

TP391

张坤平, 郝琳. 基于模型预测的微电网频率协调控制策略[J]. 系统仿真学报, 2021, 33(3): 581-590.

Zhang Kunping, Hao Lin. Frequency Coordinated Control Strategy of Microgrid Based on Fuzzy Prediction[J]. Journal of System Simulation, 2021, 33(3): 581-590.

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