微电网数字过流保护控制系统设计与仿真

Design and Simulation of Digital Overcurrent Protection Control System for Microgrid

本文针对微电网灵活的运行模式给传统继电保护方法带来的严峻挑战等问题,提出了一种新型的基于FPGA(现场可编程门阵列)的微电网数字过流保护方法。目前随着数字保护技术的成熟,根据国际电工委员会建立的反时限过流继电器的动作特性标准,反时限过流保护在我国电力设备和低压配网中也得到了逐步的应用。根据电网对继电器保护的要求并结合微电网保护中的特殊要求,提出一种基于FPGAXi的数字过电流保护系统设计方案,并且结合IEC255-03标准建立模型并在MATLAB中进行仿真,该保护方案能在微电网中更快地识别和隔离故障部分,从而提高微电网的可靠性。仿真结果最终验证了所述方案的正确性和可行性。

Aiming at the severe challenges brought by the traditional operation mode of micro-grid to the traditional relay protection method,a new digital over-current protection method based on FPGA(field programmable gate array)is proposed.At present,with the maturity of digital protection technology,according to the operating characteristic standard of the anti-time limit overcurrent relay established by the International Electrotechnical Commission,the inverse time overcurrent protection has also been gradually applied in China’s power equipment and low voltage distribution network.According to the requirements of relay protection of power grid and the special requirements in microgrid protection,a design scheme of digital overcurrent protection system based on FPGA Xi is proposed,and the model is built in combination with IEC255-03 standard and simulated in MATLAB.Improve the reliability of the microgrid by identifying and isolating faulty parts faster from the microgrid.The simulation results finally verify the correctness and feasibility of the scheme.