Improvements in DFIG-LVRT Capability Via UDVR Based Vanadium Redox Battery Energy Storage System

REN Yongfeng; SUN Wei; HAN Junfei; XUE Yu

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Improvements in DFIG-LVRT Capability Via UDVR Based Vanadium Redox Battery Energy Storage System

更新时间：2025-12-08

- Improvements in DFIG-LVRT Capability Via UDVR Based Vanadium Redox Battery Energy Storage System
- Vol. 41, Issue 10, Pages: 3185-3192(2015)
- 作者机构：
  
  1. 内蒙古工业大学电力学院
  2. 内蒙古电力科学研究院
  3. 北京天润新能投资有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 October 2015，
  
  Published：2015
- 稿件说明：
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REN Yongfeng, SUN Wei, HAN Junfei, et al. Improvements in DFIG-LVRT Capability Via UDVR Based Vanadium Redox Battery Energy Storage System[J]. 2015, 41(10): 3185-3192.
DOI：

REN Yongfeng, SUN Wei, HAN Junfei, et al. Improvements in DFIG-LVRT Capability Via UDVR Based Vanadium Redox Battery Energy Storage System[J]. 2015, 41(10): 3185-3192. DOI：

摘要

为了提升双馈电机（DFIG）风电系统柔性故障穿越（FFRT）能力

提出了采用全钒液流电池（VRB）储能的三单相不间断动态电压恢复器（UDVR）应对策略。对电网电压不平衡时DFIG转子侧变换器和网侧变换器暂态特性进行了理论分析

对全钒液流电池充放电特性进行了仿真分析

对单相UDVR的工作原理、矢量关系及其控制策略进行了研究。建立了基于VRB储能的UDVR改进DFIG风电系统故障穿越能力仿真模型。采用正常运行时UDVR旁路备用

电网故障时UDVR进行电压补偿的方式

验证了DFIG-FFRT特性。结果表明:对于严重的电网对称和不对称故障情况

UDVR可向电网注入补偿电压

整个暂态过程机组向电网注入了友好型绿色能源

提升了DFIG机组无超调FFRT运行能力。

Abstract

To meet the requirements of improving the flexible fault ride through（FFRT） capability of double fed induction generator（DFIG） wind power system

we proposed a novel strategy of adopting three-single-phase uninterrupted dynamic voltage restorer（UDVR） with vanadium redox flow battery（VRB） energy storage. The transient characteristics of rotor side converter and grid side converter of DFIG under unbalanced grid voltage are analyzed

the charge-discharge characteristics of VRB is simulated and analyzed

and the single-phase UDVR working principle

unbalanced voltage vector and control strategy of UDVR are discussed. Furthermore

the simulation model for improving FFRT capability of DFIG wind power system based on VRB energy storage is established. The operation characteristics of DFIG-FFRT is verified by adopting the method

in which UDVR is bypass standby during grid normal operation and compensates unbalanced voltage during grid fault. The results reveal that

in view of the severe symmetrical and asymmetrical grid fault conditions

UDVR can inject compensation voltage to the grid. The DFIG wind turbine

in which green power is injected to the grid in whole voltage transient process

can improve the operation capacity of DFIG-FFRT without overshoot.

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