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抽水蓄能电站机组背靠背启动失败的分析和研究

2021-12-13杨敏之陈鹤虎朱冬孟繁聪周怡伶

科技资讯 2021年27期

杨敏之 陈鹤虎 朱冬 孟繁聪 周怡伶

摘要:抽水蓄能电站机组背靠背启动是保证电站机组可靠运行的重要手段。因其涉及两台机组多个系统的协调配合,十分复杂,导致部分电站机组启动成功率不高。本文结合国网新源公司部分抽蓄电站机组背靠背启动失败的案例,分析了其失败的主要原因,并提出了相应的改进措施,为机组背靠背启动的进一步深入研究提供了有益的参考。

关键词:抽水蓄能电站  背靠背启动 励磁电流 调速器

中图分类号: TM62文献标识码:A        文章编号:1672-3791(2021)09(C)-0000-00

Analysis and Research on Back-to-Back Startup Failure of Pumped Storage Power Station Unit

CHEN Hehu1  ZHU Dong2  MENG Fancong1 ZHOU Yiling1

(1. East China Yixing Pumped Storage Co., Ltd.,Yixing,Jiangsu Province,214200 China;2.Shanghai Minghua Power Technology Co., Ltd.,Shanghai,200090 China)

Abstract: Back to back startup of pumped storage power station units is an important means to ensure the reliable operation of power station units. Because it involves the coordination and cooperation of multiple systems of two units, it is very complex, resulting in the low start-up success rate of some power station units. Combined with the cases of back-to-back startup failure of some pumping and storage power plants in State Grid Xinyuan company, this paper analyzes the main causes of the failure, and puts forward the corresponding improvement measures, which provides a useful reference for the further research of back-to-back startup of units.

Key Words: Pumped storage power station; Back to back start; Excitation current; Governor

近年来,随着风光等不稳定电源并网容量的增加以及西电东送带来的大规模直流特高压电源接入东部电网,抽水蓄能电站在电网削峰填谷的调节作用越来越突出[1]。抽水蓄能电站在电网中的安全、稳定运行直接影响着电网的可靠性。而对于抽水蓄能机组而言,运行过程中最薄弱的环节是包括启停机在内的各种工况间互相转换的暂态过程,其中又以抽水启动流程最为繁琐复杂,涉及机组从停机稳态到抽水调相,再从抽水调相到抽水两个转换过程的成功实现。启动过程中需要机组在压水期间,定转子之间的电磁力足够克服机组静态惯性以及各部瓦对主轴的机械阻力才可实现机组水泵方向的旋转。因此在抽水蓄能机组众多的工况转换流程中,由停机稳态至抽水调相的转换过程往往最为关键,同时也是相对而言转换失败率最高的。而背靠背启动是机组水泵工况启动的主要方式之一,因此,研究背靠背启动方式的过程,分析背靠背启动失败的原因,对于提高机组启动成功率和机组运行的可靠性意义重大。……

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