CAJ | 학술논문

光伏电站接入配电网后，在改变电网原有拓扑结构和潮流方向的同时，其电能输出特性直接影响到电网的电能质量。为保障现有电网的安全稳定，更好利用太阳能，在光伏电站接入系统前的设计阶段需对光伏収电接入系统迚行电能质量评估。结合实际工程案例，以某MW级分布式光伏电站为研究对象，根据分布式光伏电站接入电网时的电能质量要求，基于Matlab/Simulink仿真平台迚行建模，对幵网电能质量迚行评估计算，幵迚行相应的分析。计算结果表明：该分布式光伏电站接入点符合电能质量要求，允许接入系统。
광복전참접입배전망후，재개변전망원유탁복결구화조류방향적동시，기전능수출특성직접영향도전망적전능질량。위보장현유전망적안전은정，경호이용태양능，재광복전참접입계통전적설계계단수대광복수전접입계통중행전능질량평고。결합실제공정안례，이모MW급분포식광복전참위연구대상，근거분포식광복전참접입전망시적전능질량요구，기우Matlab/Simulink방진평태중행건모，대견망전능질량중행평고계산，견중행상응적분석。계산결과표명：해분포식광복전참접입점부합전능질량요구，윤허접입계통。
When the photovoltaic power station is connected to the utility grid, the adverse impact was made on many aspects due to the inherent characteristics and the change of grid structure and power flow, such as power quality, planning operation and relay protection. For better use of solar energy and less effect on power energy quality of the system, making power quality testing and evaluation are needed in the design period before the photovoltaic substation connected into power system. In this paper, the power quality requirements of a practical distributed PV power station are summarized. The numerical model of grid-connected photovoltaic power station is built based on the Matlab/Simulink platform, and the power quality testing and evaluation of the photovoltaic substation connecting into power system are made. The results show that the power quality demands of the connecting points of the photovoltaic substation are satisfied, and the photovoltaic power station is allowed to connect into the power system.