基于RTDS的VSC控制参数分环拟合方法
摘要：电压源换流器（voltage source controller，VSC）作为风电、光伏及换流站等设备的主要电力电子元器件，其控制方式和参数整定对系统运行有着重要的影响。基于实时数字仿真仪（real time digital simulator，RTDS）半实物仿真和纯数字仿真，提出一种用于拟合实际VSC控制模型参数的方法。以典型VSC并网系统模型为例，首先，借鉴锁相环原理提出一种具有自适应性观测坐标系建立方法，用于对比拟合2种仿真模型的阶跃响应；其次，分别给出了VSC锁相环、电流内环和电压外环的拟合方法，其中在电流内环控制参数拟合过程中，利用观测坐标系在控制器锁相环输出角度未知时实现电流阶跃；最后，通过不同控制环节模型参数拟合时的仿真对比分析，证明了所提方法的有效性。
Abstract:Voltage source converter (VSC) is the main power electronic components of wind power, photovoltaic and converter stations. It's control mode and parameter setting have important influence on system operation. Based on real time digital simulator (RTDS) hardware-in-loop simulation and digital simulation, a new method of parameter fitting applied to characterize physical VSC was proposed. Taking a typical single VSC grid connected system model as an example, firstly, based on the principle of phase-locked loop (PLL), an adaptive observation coordinate system was proposed to compare and fit the step response of two simulation models. Then the fitting methods of PLL, current inner loop and DC voltage outer loop in VSC control system were introduced separately. Self-adaptive observational coordinate system was used in the process of current inner loop parameter fitting. Finally, the efficiency of the proposed method was verified by the comparative analysis of simulations.
标题：基于RTDS的VSC控制参数分环拟合方法
title:Sub-parts Control Parameter Fitting Method of VSC Based on RTDS
