作　　者： ; ; ; ; ;

机构地区： 广东工业大学自动化学院

出　　处： 《广东电力》 2013年第5期27-33,共7页

摘　　要： 永磁直驱风力发电系统通常通过全功率变换器并入电网,为提高并网运行的稳定性,研究三相电压型双脉冲宽度调制(pulse width modulation,PWM)变换器矢量控制策略。依据背靠背电压型整流器(voltage source rectifier,VSR)的d-q轴数学模型,结合空间矢量PWM技术,建立永磁直驱风力发电系统的网侧PWM变换器仿真模型;采用前馈解耦方案,实现VSR的有功、无功功率解耦控制,获得基于电网电压定向的电压电流双闭环控制策略;通过选择兼顾系统良好性能要求的控制参数,使得直流母线电压快速稳定,改善电流的谐波畸变率。建立了MATALAB/Simulink仿真模型,仿真结果表明系统具有良好的动态响应能力,验证了所提控制策略的正确性和有效性。 Through total power converter, the permanent magnet direct drive wind power system can connect with power grid. For promoting stability of synchronization and parallel-in, this paper studies control strategies for three phase voltage sourced dual pulse width modulation converter vector. According to d-q axis mathematical model of back-to-back voltage sourced rectifier and combining space vector PWM technology, it builds grid side pulse width modulation converter simulation model of permanent magnet direct drive wind power system. By using feedforward decoupling scheme, it is able to realize active and reactive power decoupling control of VSR and acquire voltage and current double closed-loop control strategy based on grid voltage orientation. By choosing control parameters considering requirement for good performance of the system, it is able to keep fast stability of the direct bus voltage and improve harmonic distortion rate of current. It also builds MATALAB/Simulink simulation model and the simulation result shows that this system is well provided with good dynamic responsiveness which verifies correctness and effectiveness of proposed control strategies.

关 键 词： 风力发电系统 电压型变换器 电网电压定向 空间矢量脉宽控制 解耦控制 谐波畸变率 双闭环控制

领　　域： [电气工程] [自动化与计算机技术] [自动化与计算机技术]