10 kV数字物理混合仿真扰动试验系统设计

Design of 10 kV digital-physical hybrid simulation disturbance test system

传统电能质量扰动试验系统不能直观反应实际电网扰动,也不能用于测试实际电网扰动下并网设备的运行特性。对此提出一种10 kV/3 MVA数字物理混合仿真扰动试验系统设计方法。该方法能够在实验室环境下实现电力系统运行模拟,可用于电网故障下并网设备的特性研究;同时本扰动试验系统也能模拟基于波形特征描述的电能质量问题。提出了数字物理混合扰动试验系统的总体框架,功率接口为级联H桥式背靠背拓扑,在逆变侧采用比例+重复控制模拟数字侧仿真波形,仿真结果证明所提出的设计方案的可行性。

The traditional power quality disturbance test system can neither directly reflect the actual power grid disturbance,nor can be used to test the operation characteristics of grid-connected equipment in the case of the actual grid disturbance.In this paper,a design method of 10 kV/3 MVA digital-physical hybrid simulation disturbance test system is proposed,which can be used to simulate the operation of power system in laboratory environment and study the characteristics of grid-connected equipment under grid fault.At the same time,the disturbance test system can also simulate the power quality problem based on waveform feature description.In this paper,the general framework of the digital-physical hybrid disturbance test system is presented.The power interface is a cascaded H-bridge back-to-back topology.To analogize digital side simulation waveform output,the inverter is controlled by proportional control and repetitive control in output sides.The simulation results show the feasibility of the proposed design scheme.