基于同步坐标变换的VSC_HVDC暂态模型及其控制器.pdf

文档介绍：2007 年 2 月电工技术学报
第 22 卷第 2 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Feb. 2007
基于同步坐标变换的 VSC-HVDC
暂态模型及其控制器
陈海荣 1, 2 徐政 1
(1. 浙江大学电机系杭州 310027 2. 金华职业技术学院金华 321017)

摘要对基于电压源型换流器的新型直流输电系统的暂态数学模型和控制策略进行了研究,
建立了同步旋转坐标系下 VSC-HVDC 系统的暂态数学模型,提出了直接电流控制策略和双闭环
控制器结构。内环电流控制器采用电流反馈和电压前馈的解耦控制策略,实现电流的快速跟踪控
制;外环控制器由稳态逆模型和 PI 调节器构成,实现系统有功功率和无功功率的独立调节。最后,
基于 PSCAD/EMTDC 的数字仿真验证了所设计的控制器具有很好的控制性能。
关键词:电压源换流器高压直流输电直接电流控制稳态逆模型
中图分类号:TM721

Transient Model and Controller Design for VSC-HVDC Based on
Synchronous Reference Frame
Chen Hairong1,2 Xu Zheng1
(1. Zhejiang University Hangzhou 310027 China
2. Jinhua College of Profession & Technology Jinhua 321017 China)
Abstract The mathematical model and control strategy of the VSC-HVDC system are studied in
the paper. The transient mathematical model for the VSC-HVDC system in dq synchronous reference
frame is developed,in which direct current control strategy and dual closed loop structure are proposed.
Decoupled control structure consisting of current feedback and voltage feed-forward is adopted in the
inner current control loop which can track the reference current quickly. The outer loop is power
regulators, bines the inverse steady state model with PI regulator, and can control the active
and reactive power separately. Simulation results realized by PSCAD/EMTDC s