双极型LCC-HVDC直流系统作为黑启动电源的启动方法及策略
Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source
王清未 1刘之滨 1陈炳奇 2林济铿2
作者信息
- 1. 国家电网有限公司华北分部,北京 100053
- 2. 同济大学电子与信息工程学院,上海 201804
- 折叠
摘要
科学合理的黑启动电源及方案是应对电网灾变停电的最有效策略,可加快其系统恢复进程,大幅减少停电损失.双极型换相换流器型高压直流系统(LCC-HVDC)具有调节灵活输电容量大的优势,但其作为黑启动电源存在一定的困难.提出了以双极型LCC-HVDC为黑启动电源的黑启动方法及完整过程,实现向受端无源网络恢复供电,以加速其恢复进程.首先给出了双极型LCC-HVDC作为黑启动电源时所面临的问题及相应的解决策略;进而给出了双极型LCC-HVDC作为黑启动电源恢复向受端无源网络恢复供电的实现过程.该过程包括 2 个阶段,第 1 阶段实现双极型LCC-HVDC的仿融冰模式启动;第 2 阶段为从仿融冰模式过渡到向受端无源网络恢复供电过程.算例证实了该启动方法的有效性和正确性.该方法使双极型LCC-HVDC具备了黑启动能力,并利用直流系统为受端电网的系统恢复过程提供了电压和频率支撑.
Abstract
The scientific and reasonable black-start scheme is the most effective measure to cope with the power grid blackout,which can greatly accelerate the system recovery process,thus significantly reducing the losses of power system due to power failure.The bipolar LCC-HVDC system has the advantages of flexible regulation and large transmission capacity,while it has some difficulties as a black start source.This paper presents a new black start method for bipolar LCC-HVDC system used as the black start power source to restore the power supply of the passive receiving-end network,so as to speed up the the recovery process.Firstly,the problems for using bipolar LCC-HVDC system as a black start source and the corresponding addressing measures are presented.And then,the implementation processes for using the bipolar LCC-HVDC system as a black start power source to restore the power supply of the passive receiving-end network are presented in detail.The process includes two stages:the first stage realizes the pseudo-deicer mode startup of the bipolar LCC-HVDC system;the second stage realizes the transition from the pseudo-deicer mode to the restoration of power supply of the passive receiving-end network.The case study verified the effectiveness and validity of the proposed method.This method makes the bipolar LCC-HVDC system have the black-start capability,and utilizes the DC system to provide voltage and frequency support for system restoration of the receiving-end power grid.
关键词
黑启动电源/双极型LCC-HVDC直流系统/仿融冰模式/电网灾变停电/受端无源网络Key words
black-start power source/LCC-HVDC system/pseudo-deicer mode/power grid blackout/passive receiving-end network引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据