发电厂励磁限制与发变组保护配合分析

Cooperation Analysis of Plant Excitation Limit and Transformer Protection

发变组保护与励磁系统是发电厂继电保护中重要的一部分,同时也是继电保护整定计算的重点、难点所在。发变组保护与励磁系统限制的合理配合、整定,关系到机组、电网的安全稳定,同时也是网源协调参数核查中的重要部分。通过对本厂继电保护的整定计算,分析阐述了发电机失磁保护与励磁系统低励限制、发电机转子过负荷保护与励磁系统强励限制、发变组过激磁保护与励磁系统伏赫兹限制、发电机定子绕组过负荷保护与励磁系统定子过电流限制的配合关系,对其它发电企业的网源协调参数核查、励磁和发变组保护装置的整定计算、配合、校核有着较好的参考意义。

Transformer protection relay with excitation system is an important part of the power plant, but also focus on setting calculation of relay protection, the difficulty lies. Transformer protection and excitation system with a reasonable limit, tuning, related to the units, grid security and stability, but also the network source coordination parameters important part of verification. By setting calculation of relay protection Our analysis describes the generator loss of field protection and low excitation limit excitation system, generator rotor excitation system overload protection and strong excitation limit, overexcitation transformer Group Protection and Excitation System V Hz limit generator stator winding excitation system overload protection and over-current limit of the stator with the relationship of other power generation enterprise network source verification coordination parameters, and excitation transformer protection device setting calculation, teamwork, it has a good reference significance.