水电汇集多直流弱送端电网稳定控制及系统保护方案

DONG Yu

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水电汇集多直流弱送端电网稳定控制及系统保护方案

更新时间：2025-08-13

- 水电汇集多直流弱送端电网稳定控制及系统保护方案
- Automation of Electric Power Systems Vol. 42, Issue 22, Pages: 19-25(2018)
- 作者机构：
  
  国家电网公司西南分部,四川省,成都市,610041
- 作者简介：
- 基金信息：
- DOI：
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- Published：2018
- 稿件说明：
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DONG Yu. [J]. Automation of electric power systems, 2018, 42(22): 19-25.
DOI：

DONG Yu. [J]. Automation of electric power systems, 2018, 42(22): 19-25. DOI：

摘要

渝鄂柔性直流背靠背和藏中-昌都联网工程投运后，具备水电汇集多直流弱送端特征的西南电网规模显著减小且长链式弱互联结构突出，电网安全稳定特性面临深刻变化。在深入分析西南电网运行特性和面临风险的基础上，指出了现有安全稳定控制策略的不足，提出了适应西南电网差异化稳定控制需求的系统保护架构和功能配置方案，并阐述了其关键技术。该系统中全网功角稳定控制、频率控制、电压控制、低频振荡和超低频振荡抑制，以及全景状态感知与监测等功能，可提高西南电网水电送出能力，支撑西南乃至国家电网安全稳定运行。

Abstract

Due to the operation of Chongqing-Hubei back-to-back flexible DC and central Tibet-Changdu networking project

the scale of Southwest China synchronous power grid is significantly reduced

and the long chain-weak interconnection structure is outstanding. The characteristics of power grid security and stability face profound changes. Based on the in-depth analysis of the operation characteristics and risks of Southwest China power grid

the weakness and shortcomings of existing security and stability control strategies are analyzed. The architecture and function configuration scheme of system protection are proposed to meet the demand of differential stability control for the Southwest China power grid

and its key technologies are expounded. The system realizes power-angle stability control in the whole grid

frequency control

voltage control

suppression of low frequency oscillation and ultra-low frequency oscillation and panoramic state sensing and monitoring

which improves the transmission capability of large-scale hydropower in Southwest China power grid

and ensures the safe and stable operation of the Southwest China power grid and even the national power grid.

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Coordinated Control of Cross-region DC Frequency Control and Emergency Power Support in System Protection

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