CAJ | 학술논문

孤岛效应是光伏并网发电系统必须要解决的基本问题之一。针对传统主动移相式孤岛检测方法存在检测盲区及对输出电能质量影响较大的问题，通过分析传统方法中参数与检测盲区的关系，并基于模糊控制，提出了一种新型主动移相式孤岛检测方法。根据孤岛发生时公共耦合点电压频率的变化情况，对改进方法中的参数 k 进行自适应调整。基于 Matlab/Simulink的仿真结果验证了该方法不仅能准确快速地检测出孤岛，而且进一步减小了检测盲区，同时也减小了扰动对电能质量的影响。逆变器输出电流畸变相对于传统方法降低了0.48%。
고도효응시광복병망발전계통필수요해결적기본문제지일。침대전통주동이상식고도검측방법존재검측맹구급대수출전능질량영향교대적문제，통과분석전통방법중삼수여검측맹구적관계，병기우모호공제，제출료일충신형주동이상식고도검측방법。근거고도발생시공공우합점전압빈솔적변화정황，대개진방법중적삼수 k 진행자괄응조정。기우 Matlab/Simulink적방진결과험증료해방법불부능준학쾌속지검측출고도，이차진일보감소료검측맹구，동시야감소료우동대전능질량적영향。역변기수출전류기변상대우전통방법강저료0.48%。
Islanding effect is one of the basic problems of photovoltaic grid-connected systems that must be resolved. Against the traditional active phase-shifting islanding detection method which has the problems of non-detection zone and a greater influence on the output power quality, by analyzing the relationship between the parameters and the non-detection zone of traditional detection method, and based on the fuzzy control, this paper proposes a novel active phase-shifting islanding detection method. The parameter k of the method is adjusted adaptively according to the change situation of frequency of voltage at the point of common coupling when the islanding occurs. Matlab/Simulink simulation results demonstrate the method not only can detect the islanding accurately and quickly, but also reduce the non-detection zone, and at the same time reduce the impact of disturbances to power quality. The inverter output current distortion is reduced by 0.48% compared with the traditional method.