后石电厂600 MW机组部分继电保护整定

针对后石电厂工程(6×600MW)采用数学分析和物理建模相结合的方法，对600MW发变组保护的配置和整定计算逐一分析分绍，有采用判别机端无功电流幅值原理的发电机失磁保护，采用判别机组和系统功角原理的失步保护和采用判别发电机中性点端三次谐波辅值原理的100%定子接地保护，以求在配置和整定值上满足大机组对保护选择性、灵敏度和可靠性要求，经现场实际运行证明，本整定方案切实可行。

The Setting of 600 MW Generator-Transformer Unit Protections in Houshi Power Plant

Based on the combination of mathematic analysis and physic modeling, the configuration and setting of different protection relays which are used for 600 MW generator transformer unit in Houshi Power Plant project are analyzed in detail. The generator excitation loss protection adopts the reactive current amplitude principle on generator end, the generator out of step protection adopts the power angle principle of unit and system. the 100% stator grounding protection adopts the 3 rd harmonic principle at generator neutral terminal. It is used to meet the requirements of big unit set for selectivity, sensitivity and reliability in configuration and setting. The field operation proves that the setting scheme is practicable.