CAJ | 학술논문

孤岛检测是目前在分布式并网发电系统研究中的难点之一。大电网要求分布式并网系统必须拥有良好的反孤岛能力，从而保证整个系统的良好稳定运行。本文提出了加入电流扰动的主动检测用以消除常用的OVR/OUR检测方法存在的检测盲区。该方法不会对电网的频率产生影响，也不会向电网注入谐波，尤其克服了常用的OVR/OUR检测方法在逆变器输出功率和负载功率相匹配时检测失效的缺陷，可达到无盲区检测，并用仿真验证了其正确性。
고도검측시목전재분포식병망발전계통연구중적난점지일。대전망요구분포식병망계통필수옹유량호적반고도능력，종이보증정개계통적량호은정운행。본문제출료가입전류우동적주동검측용이소제상용적OVR/OUR검측방법존재적검측맹구。해방법불회대전망적빈솔산생영향，야불회향전망주입해파，우기극복료상용적OVR/OUR검측방법재역변기수출공솔화부재공솔상필배시검측실효적결함，가체도무맹구검측，병용방진험증료기정학성。
Island detection is one of the difficult problems in distributed generation research. Power grid requires that a distributed grid system must have a good ability of anti-island to ensure the stable operation of the whole sys-tem. In this study,the current amplitude disturbing was used to eliminate the blind area by OVR/OUR island de-tection method. This method would not affect the frequency of grid or have harmonic injection to grid,and could o-vercome the shortcoming that OVR/OUR island detection fails to work when the output of inverter matches load power. This method can reach non-blind detection. Simulation has proved the correctness of this method.