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海洋石油平台是孤立的小电网系统,主发电机的微机保护对保证平台电力系统的正常工作和电能质量起着决定性的作用,其中微机失磁保护指发电机的励磁突然全部或部分消失,发电机与系统失去同步,此时发电机微机保护装置动作发电机出口断路器,使发电机与电网脱离,防止发电机损坏并保护电网稳定运行。以锦州9-3项目为例,对基于AREVA MICOM P343发电机保护装置的微机失磁保护整定及其校验进行探讨,给出一种基于该装置的发电机微机失磁保护的整定计算及其校验方法。
Offshore oil platform is an isolated small power grid system. Microcomputer protection of the main generator plays a decisive role in ensuring the normal operation and power quality of the platform power system. In this case, the demagnetization protection of the micro-computer refers to the sudden or partial disappearance of the excitation of the generator. Machine and the system loses synchronization, this time the generator microcomputer protection device action generator outlet circuit breaker, so that the generator and the grid from, to prevent damage to the generator and to protect the power grid stable operation. Taking Jinzhou 9-3 project as an example, this paper discusses the setting and verification of microcomputer demagnetization protection based on AREVA MICOM P343 generator protection device, and presents a setting calculation of generator demagnetization protection based on the device and its Verification method.