基于ETAP的分布式电源接入对配网供电可靠性影响分析

Power Supply Reliability Analysis of Distribution Network with Distributed Generation Based on ETAP

大规模分布式电源接入是今后配电网发展的必然趋势,对供电可靠性、电能质量及继电保护等方面产生不同程度的影响。为研究分布式电源接入位置对常规配网供电可靠性的影响,在ETAP仿真平台上搭建配网供电可靠性评估模型,然后分别在不同位置接入相同容量的分布式风电,最后根据仿真计算结果分析分布式电源接入前后及接入位置对配网供电可靠性的影响。在某城市配电网10kV馈线系统上的仿真计算结果表明,分布式电源接入后能有效提高常规配网的供电可靠性,且当分布式电源由末端分支线接入时对系统供电可靠性的提升效果更显著。

The access of large-scare distributed power source is the inevitable trend of distribution network development in future, which influences power supply reliability, power quality and relay protection and son on in different degree. In order to study the influence of access position of distributed power source on the power supply reliability of traditional distribution network, the distribution network reliability evaluation model is set up on ETAP simulation platform, in which distributed wind powers with same capacity are accessed separately in different positions. Finally, the influence of the before and after access of large-scare distributed power source and the access position on the power supply reliability of distribution network is analyzed based on simulation results. Simulation calculation results at the 10 kV feeder system of a city distribution network show that distributed power source after its access can effectively improve the power supply reliability of traditional distribution network, and the improvement effect to the system power supply reliability is more significant when distributed power source is accessed at the terminal of branch line.