基于功率变换器与励磁电压扰动法的SRG风电MPPT控制  

MPPT Control of SRG for Wind Power Based on Power Converter and Excitation Voltage Disturbance Method

作　　者：孙冠群[1] 张海丽[1] 蔡慧[1] 

机构地区：[1]中国计量大学机电工程学院,浙江省杭州市310018

出　　处：《电力系统自动化》2017年第2期101-107,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51407173);浙江省公益技术应用研究项目(2015C31119)~~

摘　　要：提出一种新型开关磁阻发电机(SRG)自励解耦型功率变换器结构和运行方法,满足两相绕组同时工作,克服了传统他励式和自励式功率变换器的缺点,发电电压与励磁电压之间经过带隔离的正激电路实现解耦,励磁电压独立可调。基于此新型功率变换器,提出基于励磁电压扰动法进行SRG最大功率点跟踪(MPPT)的控制方法,该方法不依赖于复杂数学模型,通过检测励磁电压扰动下输出功率与转速的变化,实现MPPT。最后,通过仿真分析和实验验证说明,最大功率跟踪效果较好。A self-excitation decoupled power converter for the switched reluctance generator（SRG）is proposed.It can realize simultaneous operation of the two-phase winding in the SRG,thus overcoming the disadvantages of traditional power converters.Moreover,the excitation voltage can be adjusted independently,since it is decoupled from the power generation voltage by an isolated positive excitation circuit.Based on the proposed converter,this paper firstly proposes an excitation voltage disturbance method for maximum power point tracking（MPPT）for SRG.The proposed method measures the output power and speed after the excitation voltage disturbance to achieve MPPT,which is independent of complex mathematical models.Finally,maximum power tracking performance from simulation and experimental results verifies the effectiveness of the proposed method.

关 键 词：开关磁阻风力发电机 解耦型功率变换器 励磁电压扰动法 最大功率点跟踪(MPPT) 

分 类 号：TM614[电气工程—电力系统及自动化]