Transient Voltage Stabilization and Control Optimization for Large-scale Wind Power UHV DC Transmission System

REN Chong; KE Xianbo; FAN Guowei; LIU Xuchen; LU Haiyang

doi:10.13296/j.1001-1609.hva.2020.05.025

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Transient Voltage Stabilization and Control Optimization for Large-scale Wind Power UHV DC Transmission System

更新时间：2025-04-26

- Transient Voltage Stabilization and Control Optimization for Large-scale Wind Power UHV DC Transmission System
- High VoltageApparatus Vol. 56, Issue 5, Pages: 163-174(2020)
- 作者机构：
  
  1. 国家电网公司西北分部
  2. 新疆电力公司
  3. 南京南瑞继保电气有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.05.025
  CLC： TM721.1
- Published：2020
- 稿件说明：
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[1]任冲,柯贤波,樊国伟,刘旭晨,陆海洋.大规模风电直流送出系统过电压抑制措施及控制方案优化研究[J].高压电器,2020,56(05):163-174.

REN Chong, KE Xianbo, FAN Guowei, et al. Transient Voltage Stabilization and Control Optimization for Large-scale Wind Power UHV DC Transmission System[J]. High voltageapparatus, 2020, 56(5): 163-174.
[1]任冲,柯贤波,樊国伟,刘旭晨,陆海洋.大规模风电直流送出系统过电压抑制措施及控制方案优化研究[J].高压电器,2020,56(05):163-174. DOI： 10.13296/j.1001-1609.hva.2020.05.025.

REN Chong, KE Xianbo, FAN Guowei, et al. Transient Voltage Stabilization and Control Optimization for Large-scale Wind Power UHV DC Transmission System[J]. High voltageapparatus, 2020, 56(5): 163-174. DOI： 10.13296/j.1001-1609.hva.2020.05.025.

摘要

大规模风电特高压直流集中外送系统中

直流故障时由于扰动大且风电机组抗电压扰动能力差

暂态过电压问题突出

导致直流功率和新能源功率形成互相制约的矛盾关系

严重影响大规模风电特高压直流外送系统安全稳定运行和近区新能源消纳。为解决上述问题

提升大规模直流送出系统稳定水平及新能源消纳能力

分析了大规模风电直流送出系统电网暂态压升机理及影响过电压水平的因素

根据影响过电压水平的关键因素

提出利用风机过压保护差异性

允许部分风机高压保护动作脱网

利用直流FLC（Frequency limit control）功能及联切风电场电容器阻断大规模新能源连锁故障、优化风电机组无功控制特性等多项组合措施以降低过电压的思路。根据上述思路

以祁韶直流风电送出系统为研究对象

制定了直流近区新能源优化控制方案

仿真计算结果证明了文中所提思路的有效性。文中成果已经在祁韶直流运行控制中得到实际应用

有效提升了新能源消纳能力和系统稳定水平。

Abstract

In the large-scale wind power UHV DC centralized transmission system

the transient voltage rise problem is prominent due to the poor resistance of the wind turbine to voltage disturbance in DC fault condition

which leads to the contradiction between DC power and new energy power

and seriously affects safe and stable operation and near-field new energy consumption of the large-scale wind power UHVDC transmission system.Aiming at the above problems

the Qi-Shao DC wind power transmission system was taken as the object to analyze the mechanism of transient voltage rise of the Qi-Shao DC wind power transmission system

and a number of measures were proposed and implemented

such as allowing partial high-voltage protection action of the wind turbine to be off-grid

using the FLC function to block large-scale new energy cascading failures and to switch off wind farm capacitors in the case of failure

and optimizing the reactive power control characteristics of wind turbines.Based on these measures

an optimum control scheme for DC near-zone new energy was established

which could help to boost the stability of large-scale DC power transmission system and the new energy utilization capability.This research has been applied to theoperation control of the Qi-Shao DC wind power transmission system

and has effectively improved the new energy consumption capacity and system stability level.

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