大亚湾核电站900 MW核电机组超加速度保护存在的问题分析及对策

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Analysis and Solutions of Existing Acceleration Protection Problems in 900 MW Unit of Daya Bay Nuclear Power Station

1. Power Research Institute of Guangdong Power Grid Corporation, Guangzhou, 510600, China;
2. Guangdong Electric Power Dispatch Center, Guangzhou, 510600, China

摘要: 介绍了大亚湾核电站900 MW机组一次因电网三相短路故障诱发汽轮机超加速度保护动作,直至手动打闸停机的事件,对相关问题进行了分析,并提出了取消高压截止阀对超加速度保护响应的改进措施。通过完善相关涉网自动保护和控制策略,改善了电网及核电机组本身的安全稳定性。
- 核电机组 /
- 超加速度保护 /
- 蒸汽阀快关 /
- 电网 /
- 可靠性
Abstract: In this paper, an incident in Daya Bay 900 MW nuclear unit, in which the turbine-generator acceleration protection action was initiated by three-phase short circuit fault of power grid and then manually tripped by the operator, was introduced, and the related issues were analyzed.An improvement measure to cancel the response of the high pressure steam valve to the acceleration protection have been put forward. The safety stability of the grid and nuclear generator unit has been improved by improving the related automatism and protection and their control strategy.
- Nuclear generator unit /
- Acceleration protection /
- Fast valving /
- Power grid /
- Reliability