一种相位实时跟踪调整的光伏并网发电模拟系统

A photovoltaic grid-connected power generation simulation system with real-time phase tracking and adjustment

本文设计了一种光伏并网发电模拟系统,研究符合国家电网标准的输出电流,减少并网发电系统中的高次谐波分量。本系统以STM32F103ZET6为主控器,采用降压变压器及电压比较器提取电网中高压交流电的零相位时刻作为参考相位,对发电模拟系统的输出与参考相位之间存在的相位差进行比例调节,提高系统跟踪相位的速度和系统的稳定性。测试结果表明,本文设计的光伏并网发电模拟系统可输出50Hz且频率偏差小于0.1Hz的正弦波,符合国家电网要求,验证了方案的可行性与有效性。

In this paper, a photovoltaic grid-connected power generation simulation system is designed to study the output current that meets the national grid standards and reduce the higher harmonic components in the grid-connected power generation system. This system uses STM32 F103 ZET6 as the main controller, and uses the step-down transformer and voltage comparator to extract the zero-phase time of the high-voltage AC power in the power grid as the reference phase. The speed of the system tracking phase and the stability of the system. The test results show that the photovoltaic gridconnected power generation simulation system designed in this paper can output a sine wave with a frequency deviation of less than 0.1 Hz at 50 Hz, which meets the requirements of the national power grid, and verifies the feasibility and effectiveness of the scheme.