光伏电源对配电网电压影响的逐时模拟

Hourly Simulation of Distribution Network Voltage Influenced by PV Power Sources

随着光伏电源大量接入配电网,其对配电网电压造成的影响也越来越显著。由于实际系统运行数据不易获取或很少,因此利用计算机模拟进行分析具有方便快速等独特优势。提出利用数值模拟技术和模块化的分析方式设计了光伏电源接入配电网的数值模拟系统,其计算模块包括太阳辐射、光伏阵列、环境温度、逆变器和含光伏电源的配电网潮流计算。最后编制模拟程序在计算机上模拟了晴天条件下光伏电源对配电网电压的逐时影响,并进行了相应分析。为进一步开发适合中国国情的光伏电源并网的专用仿真工具做了初步探讨和尝试。

As a large number of photovohaic （PV） power systems are connected into the distribution network, their effects on voltage of distribution networks become more and more significant. Since the operating data of actual system is not easily obtained, or inadequate, the application of computer modeling technique in analysis has advantages of convenience and rapidity. In this paper, the numerical simulation technology and modularization analysis approach were used to design the Numerical Simulation System of PV Generation Distribution Network Integration and the calculation modules of Numerical Simulation System consist of solar radiation, photovohaic array, ambient tem- perature, inverter and power flow calculation of distribution network with PV power systems. Finally, a computer program has been made to hourly simulate the impacts of PV power system on distribution network voltage in the clear day conditions and the corresponding analysis is carried on. Preliminary discussion and attempt are made for the development of the specialized PV grid-connected simulation tools suited to conditions in China in the further.