Optimization control method for improving reliability of unit bypass heat supply operation

Abstract

The invention relates to the technical field of automatic control of thermal power units, in particular to an optimization control method for improving the reliability of unit bypass heat supply operation. The method comprises the following steps that when a heat supply thermal power generating unit is in a bypass heat supply mode, the fault of the unit bypass heat supply system is judged throughconfiguration of a control logic of a DCS of the heat supply thermal power generating unit; the size of bypass heat supply steam flow is judged, and interlocking protection action is performed in combination with fault of unit bypass heat supply system, so that the safety and stable operation of the unit is ensured; an automatic control logic is added, and the stability of operation parameters ofthe unit bypass heat supply system is controlled; and historical operation data and design data of the DCS of the heat supply thermal power generating unit are inquired, and all automatic control logic parameters are set. According to the method, the safety of equipment can be guaranteed under the working condition that the heat supply quality is ensured by the heat supply unit, the labor intensity of operators is effectively reduced, the control effect is not dependent on the technical level of operators, the real-time performance is good, the field debugging process is simple, and the engineering is convenient to realize.

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...

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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 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

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