摘要
从并网分布式发电(DG)的输出功率波动出发,分析了分布式发电引起电网电压波动和闪变的主要原因。随后提出了基于潮流计算的闪变预测算法,用于识别闪变值最大的母线。基于m atlab/simu link的电磁暂态仿真被用来准确计算电压波动和闪变。最后给出了一个算例,分析了机组爬坡和退出以及机组功率波动时的闪变情况。仿真结果显示,逆变型分布式电源引入的电压闪变很小,异步发电机的功率波动是造成电网电压闪变的主要原因。
By studying power output fluctuation from distributed generation （DG） , the main causes of the voltage fluctuation and flicker were analyzed. The algorithm of flicker forecasting based on power flow model was used to identify the critical bus which had the most serious flicker among the buses. Matlab/simulink based model was used to calculate the flicker precisely. At last a sample case was presented, analyzing the DG starting and stopping voltage fluctuation, as well as the period fluctuation of power output, The results showed flicker caused by the inverter based DG was slight, and the main source of the flicker was the power fluctuation of asynchronous generations.
出处
《能源工程》
2006年第4期54-58,共5页
Energy Engineering
