微电网双向变流器的复合控制策略  

A hybrid control method for a bidirectional converter used in micro-grid systems

作　　者：潘国兵[1] 汤文轩[1] 张任[1] 王坚锋[1] 郑智超 路易吉.格尼拉 陈旭[1] 

机构地区：[1]浙江工业大学分布式能源与微网研究所,杭州310014 [2]博洛尼亚大学农业经济与工程研究院

出　　处：《高技术通讯》2017年第9期823-832,共10页Chinese High Technology Letters

基　　金：863计划(2013AA050405);国家国际科技合作专项(2014DFA70980);浙江省自然科学基金(LY15E070004)资助项目

摘　　要：研究了采用双向变流技术的微电网的稳定控制和电能质量改善方法。考虑到大电网中的动态电压恢复器(DVR)、静止无功发生器(SVG)、有源电力滤波器(APF)等由于动态响应、功率等级和经济性的原因并不适用于微电网,提出了一种基于非线性控制理论的复合控制方法。该方法对电流内环通过状态反馈使非线性系统精确线性化,并完全解耦有功和无功电流,从而提高了内环电流的跟踪精度及动态响应速度,提升了电压外环的快速响应能力。对电压外环采用滑模控制,解决了系统时变参数的问题,提高了外环电压的鲁棒性。实验表明,该复合控制方法具有网侧电流动态响应速度快、跟踪精度高、谐波电流小,直流侧电压动态响应快速的特点。The stability control and power quality improvement of micro-grid systems using a bidirectional converter is studied. In consideration of the fact that the traditional converters like dynamic voltage regulator（ DVR）,static var generator（ SVG）,active power filter（ APF） cannot be directly applied to micro grids due to the reasons of their dynamic response,power level and economy,a compound control method based on the nonlinear control theory is proposed. The method uses feedback linearization to control the inner current loop to turn the complex nonlinear system into a linear system,and fully decouples active and reactive current to improve the tracking precision and dynamic response of the inner current roop,and also improve fast response capability of the voltage outer loop; at the same time,it uses the sliding mode to control the voltage outer loop to solve the problem of time-varying parameters and to improve the robustness and anti-interference of the outer loop voltage. The experiments show that this composite control method has the abilities of fast dynamic response,higher precision,smaller harmonic of the AC side current,and the DC side voltage has the fast dynamic response.

关 键 词：微电网 电能质量 双向变流器 复合控制 反馈线性 

分 类 号：TM46[电气工程—电器]