脉冲负载对微电网运行特性影响规律的试验研究

摘要

脉冲负载结构复杂且负载特性与工作模式密切相关.为了研究脉冲负载下微电网运行特性以及脉冲负载不同参数对微电网运行特性的影响规律,建立了脉冲负载模拟装置并构建了柴油发电机组—脉冲负载试验系统;针对脉冲负载特性对电压畸变率等计算公式进行了定义;脉冲负载工作特性与占空比、工作周期、峰值功率密切相关,提出采用不同参数组合的方法模拟脉冲负载的工作特性.分析了脉冲负载在不同工作模式下对微电网运行特性的影响规律.结果表明,微电网运行特性与脉冲负载的工作模式密切相关,且不同的脉冲负载参数对微电网运行特性的影响规律和程度也不相同.%The structure of pulse load is complicated and the load characteristics is closely related to the work mode. In order to study the micro grid operation characteristics under pulse load and the different parameters of pulse load on the influence of the micro grid operation characteristics,a test system of diesel generator sets and pulse load was built,the pulse load simulator was established,and the calculation formula of the voltage fluctuation under the premise of considering the system frequency fluctuation was defined. The influence law on voltage and frequency fluctuation,power transmission efficiency and the voltage distortion degree in different working mode of pulse load through changed the duty ratio,working cycle and peak power was analyzed. Results show that the micro grid operation characteristics has a great relationship with the operation mode of pulse load ,and different pulse load parameters on the micro grid operation characteristics of the influence law and degree is different.