Method for controlling the operation of high-voltage bypass in thermal generator set

Abstract

The invention relates to a method for controlling the operation of a high-voltage bypass in a thermal generator set, which is characterized in that operational modes of the high-voltage bypass are divided into the following four modes according to the operational states of the thermal generator set: a set starting mode, a set normal operation tracking mode, a mode of shutdown without blowing-out and a blowing-out mode, wherein the set starting mode is divided into three stages according to different operational requirements of a boiler: a first set starting mode, a second set starting mode and a third set starting mode. By using the method, the opening / closing of a high-voltage bypass valve and the opening of a valve position can be controlled according to different operational stages of the set, so that main recovery pressure of the boiler is ensured to ascend smoothly, operate stably and descend smoothly; and simultaneously, the boiler can also be controlled to improve the recovery temperature quickly, so that the recovery temperature is matched with the metal temperature of a gas turbine cylinder quickly and adapt to a combined mode of fixed pressure operation and sliding pressure operation of the set, so that the starting time of the set is shortened, steam exhausting towards air is reduced, the life loss of the steam turbine is reduced, and the optimal starting of the set is realized.

Description

technical field [0001] The invention relates to the field of operation control of a thermal power generating set, in particular to an operation control method of a high-voltage bypass in a thermal generating set. Background technique [0002] The principle of thermal power generation is generally: coal, oil, natural gas, gas and other fuels are used as fuel, and the treated fuel is delivered to the boiler by using transmission technology. The fuel is burned to heat the boiler to turn the water in the boiler into steam. After that, the water vapor enters the high-pressure cylinder. In order to improve thermal efficiency, the water vapor should be reheated. The water vapor enters the medium-pressure cylinder, and the steam from the medium-pressure cylinder is used to drive the blades of the steam turbine to drive the generator to generate electricity. The steam is drawn from the medium-pressure cylinder into the symmetrical low-pressure cylinder. Part of the steam that has bee...

AI Technical Summary

Problems solved by technology

The traditional bypass control strategy is obviously not enough, it is imperative to develop a new control strategy