干扰性用户并网电能质量评估与可视化软件设计

随着新能源、电力电子设备、非线性负荷接入比例的快速增长,现有的电能质量评估方法存在无法适应不同应用需求、尚未对长时间尺度进行评估等问题。本文提出了一种干扰性用户并网电能质量评估方法，包括区域电网建模、潮流仿真分析以及影响因素评估，能够实现多时间尺度下对干扰性用户接入区域电网的电能质量规范化评估。在此基础上，建立基于B/S架构设计干扰性用户并网电能质量评估可视化软件系统，最后应用该系统对某风电场开展并网评估，结果表明接入电网后该风电场的电压偏差、电压不平衡、各次谐波电流以及电压总谐波畸变率均满足国标要求，该系统能够实现对干扰源用户模型接入电网后的电能质量标准化进行仿真。

Design of evaluation and visualization software for grid-connected power quality of disruptive users

With the rapid increase in the integration of new energy,power electronic equipment,and nonlinear loads,existing power quality evaluation methods face challenges in adapting to diverse application requirements and have not been sufficiently assessed over long-term time scales.This paper proposes a new approach to evaluating the power quality of disruptive users connected to the grid,which includes regional power grid modeling,power flow simulation analysis,and evaluation of influencing factors.This method allows for standardized power quality evaluation of disruptive users accessing regional power grids across multiple time scales.On this basis,a visualization software system for evaluating the power quality of disruptive users is developed and designed with a browser/server(B/S)architecture.The system is applied to a wind farm grid connection assessment,demonstrating that the wind farm''s voltage deviation,voltage imba-lance,harmonic currents of each order,and total harmonic distortion rate of the voltage all meet national standards.This system facilitates a standardized simulation of power quality for disruptive source user models after being connected to the grid.