应用于微电网换流器之模式切换控制装置;Device of Mode-Switching Controller for Micro-Grid Current Converter

摘要

一种应用于微电网换流器之模式切换控制装置，系作为微电网与市电并联时之电力潮流控制，其包含有一与市电连接之静态开关，系用以切离市电进行微电网独立运转、以及由微电网切入市电进行并联运转；一与静态开关连接之换流器，系用以作为直流电力与交流电力之转换；以及一连接静态开关与换流器之切换控制机构，可于侦测市电状态后，依所需决定静态开关与微电网模式之切换。藉此，当市电正常运转时，换流器系将电力送至微电网；而当市电异常时，则由切换控制机构控制换流器改变输出电流，使静态开关与市电快速切离，进行微电网之独立运转，而达到增加微电网静态开关速度和平稳性，有效保持电力系统稳定运转，可于市电故障时，让微电网能够持续运转与使用。;A device is provided to control mode-switching of a current converter. The converter is used in a micro grid. The device is used to control power current when the micro grid is connected with the main supply. When the main supply is operated well, the converter will send power to the micro grid; and, when the main supply is not operated well, the switching-control unit will control the converter to change the output current for independent operation of the micro grid by quickly cutting the static switch from the main supply. The present invention increases speed and stability of the static switch of the micro grid and effectively maintains stable operation of the power system. Thus, the present invention can keep the micro grid operate continuously when the main supply is not available.