An optimal control method for improving the reliability of the bypass heating operation of the unit

Abstract

The invention relates to the technical field of automatic control of thermal power units, in particular to an optimal control method for improving the reliability of bypass heating operation of the unit, comprising: when the heating thermal power unit is in the bypass heating mode, by configuring the heating thermal power unit The control logic of the decentralized control system DCS judges the failure of the bypass heating system of the unit; judges the size of the bypass heating steam flow, and performs chain protection actions in combination with the failure of the bypass heating system of the unit to ensure the safe and stable operation of the unit; adding automatic control Logic, to control the stability of the operating parameters of the unit bypass heating system; query the historical operating data and design data of the DCS of the decentralized control system of the thermal power unit, and adjust each automatic control logic parameter. The invention can realize the equipment safety of the heating unit under the condition of ensuring the heating quality, effectively reduce the labor intensity of the operating personnel, and the control effect does not depend on the technical level of the operating personnel; the real-time performance is good, the on-site debugging process is simple, and it is convenient for engineering accomplish.

Description

technical field [0001] The invention relates to the technical field of automatic control of thermal power units, in particular to an optimal control method for improving the reliability of bypass heating operation of the unit. Background technique [0002] The operating characteristics of the heating unit and the operation mode of "power determined by heat" limit the ability to adjust the power output, leading to serious wind / solar curtailment problems. In order to improve the consumption capacity of new energy, the National Energy Administration has put forward clear requirements for the transformation of thermal power flexibility. The methods for improving the flexibility of thermal power are divided into three types according to the unit type: heat and power decoupling for cogeneration units to reduce unit output during peak heat loads, The pure condensing unit undergoes unit transformation to achieve deep peak regulation; according to the transformation method, it is div...

AI Technical Summary

Problems solved by technology

[0004] The above documents and patents mainly compare the layout of the unit bypass system with the traditional capacity bypass, and propose a transformation plan for the steam extraction and heat supply of the steam turbine system of the intermediate reheat unit, and propose to use the unit bypass heating to improve the cogeneration unit. The deep peak shaving system and other aspects have been elaborated, but there is no targeted research on the optimal control to improve the reliability of the bypass heating operation of the unit

Images