Single-phase voltage type AC/DC converter, three-phase voltage type AC/DC converter, and stabilization control method

摘要

An object is to provide a single-phase Voltage type AC/DC converting device and a three-phase voltage type AC/DC converting device arranged between a load and a distribution network and is capable of contributing to stabilize a system frequency and a system voltage, and a stabilization controlling method of the system frequency and the system voltage. By applying an autonomous parallel operation control technique of an AC/DC converter to a load, which receives power from a distribution network, drooping characteristics (governor-free characteristics) for a frequency of active power and Voltage-maintaining characteristics (V-Q characteristics) may be obtained. The governor-free characteristics are the characteristics to automatically decrease received power when the system frequency decreases and automatically increase the received power when this increases, so that even the load may contribute to stabilize the system frequency. Further, the V-Q characteristics generates/absorbs reactive power so as to maintain a Voltage at receiving end constant regardless of load power, so that this may also contribute to stabilize the system voltage.