基于超导储能的综合电能质量调节装置及其控制策略

介绍一种新型综合电能质量调节装置——并联处理在线不间断电源，该装置仅采用一套双向电流型变流装置，利用超导线圈作为直流侧储能元件，可实现负载电压调节、有源滤波和改善功率因数等多项功能，并具有损耗小、结构简单等优点。根据装置的结构特点和工作原理，提出了一种基于同步旋转坐标系统的解耦和前馈补偿控制策略，通过采用电源电流“预补偿”的方法，解决了常规前馈补偿方法中电源电流暂态分量衰减过慢的问题。利用仿真软件PSCAD／EMTDC对该装置及其控制策略进行了仿真分析，仿真结果验证了该装置具有良好的运行性能。

SMES BASED UNIFIED POWER QUALITY CONDITIONER AND CONTROL STRATEGY

This paper presents a superconducting magnetic energy storage (SMES) based unified customer power quality conditioner, i.e. parallel processing UPS. This device employs only one bi directional current source commuter and SMES coil as storage component, which can realize multiple functions such as load voltage regulation, active filtering, input power factor improvement. The device has several advantages such as lowered loss and simplified structure. In accordance with the system configuration and operation principle, a control strategy based on synchronous reference frame (SRF) by way of decoupling and feedforward compensation is proposed in detail, and an improved control method with "pre compensation" for supply current is utilized to solve the problem of undamped transient component of supply current. The device and control method thereof are verified by the simulation results with PSCAD/EMTDC. This project is supported by National Natural Science Foundation of China (No. 50137020).