Bypass system comprehensive control method for improving the adjusting capacity of heat supply unit

Abstract

The invention relates to the technical field of automatic control methods, in particular to a bypass system comprehensive control method for improving the adjusting capacity of a heat supply unit. Thebypass system of the heat supply unit is comprehensively controlled, so that the adjusting capacity of the heat supply unit is improved. The control method comprises the following steps that the bypass system comprises a high-pressure bypass system and a low-pressure bypass system; it is judged that the heat supply unit is in a bypass heat supply mode; it is judged that the heat supply unit exitsthe bypass heat supply mode; the control logic of each valve of the high-pressure bypass system is optimized respectively; the control logic of each valve of the low-pressure bypass system is optimized respectively ; control logic configuration is carried out on the DCS of the heat supply unit, the control logic of the DCS of the heat supply unit is optimized and adjusted, and the adjusting capacity of the heat supply unit is improved. According to the bypass control system of an existing unit DCS (distributed control system), the control method is good in real-time performance, simple in field debugging process and convenient for engineering realization.

Description

technical field [0001] The invention relates to the technical field of an automatic control method, in particular to a comprehensive control method of a bypass system for improving the adjustment ability of a heating unit. Background technique [0002] The National Development and Reform Commission and the Energy Bureau clearly pointed out that "vigorously develop new energy" and "promote central heating and gradually replace small coal-fired boilers" are two key tasks for my country's electric power development. However, the operating characteristics of the heating unit and the operation mode of "heating to determine electricity" 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, it is an imminent task to improve the adjustment ability of heating units. It has deep peak-shaving capability and further increases the load response rate, and some units have fast start-sto...

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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 regulation system and other aspects have been elaborated, but there is no targeted research on the comprehensive control of the bypass system to improve the regulation capacity of the heating unit

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