CAJ | 학술논문

本文针对典型农村户用型微电网的保护技术开展研究，综合考虑并网和离网两种运行方式，分别提出了不同的保护配置方案。采用电流速断为主，限时电流速断和方向性电流保护为辅的保护配置方案以应对并网农村微电网故障，同时在离网运行时提出低电压保护方案，有效保证了农村户用型微电网的供电可靠性。基于PSCAD/EMTDC电磁暂态仿真平台，搭建典型农村微电网及保护仿真模型，对典型农村微电网并/离网保护方案进行仿真验证，结果表明保护配置方案合理有效，故障时保护装置均能准确动作并快速隔离故障，可为农村微电网的持续、稳定、安全运行提供技术支撑。
본문침대전형농촌호용형미전망적보호기술개전연구，종합고필병망화리망량충운행방식，분별제출료불동적보호배치방안。채용전류속단위주，한시전류속단화방향성전류보호위보적보호배치방안이응대병망농촌미전망고장，동시재리망운행시제출저전압보호방안，유효보증료농촌호용형미전망적공전가고성。기우PSCAD/EMTDC전자잠태방진평태，탑건전형농촌미전망급보호방진모형，대전형농촌미전망병/리망보호방안진행방진험증，결과표명보호배치방안합리유효，고장시보호장치균능준학동작병쾌속격리고장，가위농촌미전망적지속、은정、안전운행제공기술지탱。
The protections of the rural household microgrids are investigated in this paper. Considering the grid- connected and islanded operation modes, different protections including current instantaneous fault, limited current instantaneous fault, directional current and low voltage are designed respectively to ensure the reliability of power supply of rural microgrids. The protections are tested and verified based on PSCAD sim-ulation platform, simulation results show the effectiveness of the protections, which can support the continuous stable and safe operation of the rural microgrids.