摘要
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。
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.
出处
《太原科技大学学报》
2015年第3期208-212,共5页
Journal of Taiyuan University of Science and Technology
基金
太原科技大学校博科技研究启动资金(20122033)
山西省高校教改项目(J2011130
J2013064)
同洲电子科技创新基金(TZ201323)