A Sequence of Events Recording Method for Power Plants

Abstract

The invention discloses an event sequence recording method for a power plant, and belongs to the technical field of power plant control. The method comprises respectively acquiring switching quantity signals and analog quantity signals of a power plant generating set at an acquisition frequency of 1000 times / second-3000 times / second by use of an onsite digital integrated protection system of the power plant, respectively arranging marker information with precision smaller than and equal to 1ms for the switching quantity signals and the analog quantity signals, obtaining switching quantity clock synchronization signals and analog quantity clock synchronization signals, and transmitting the switching quantity clock synchronization signals and the analog quantity clock synchronization signals to a distributed control system for processing through a communication network. The method provided by the invention, on one hand, improves the digitalization level of the power plant, and on the other hand, realizes an SOE function in an onsite mode in the digital integrated protection system of the power plant such that application of numerous cables is prevented, and the anti-interference performance of the signals is improved.

Description

technical field [0001] The invention relates to the technical field of power plant control, in particular to an event sequence recording method for a power plant. Background technique [0002] The power plant generator set is a tightly coupled system. During the production process, once a certain equipment fails, it will trigger a series of equipment protection actions, forming a series of state changes of up to hundreds of measurement signals. Among these hundreds of signals, to quickly and correctly identify the initial accident and find the first fault source is usually realized by using the Sequence of Events Recording (SOE) module. It can be seen that the operation status of the power plant before and after the accident is recorded through the event sequence record, and its performance directly affects the timeliness and accuracy of the accident status analysis of the unit and important auxiliary equipment. [0003] At present, power plants generally configure a dedica...