Intelligent heat load distribution control system and method for multi-unit cooperative heat supply

Abstract

The invention relates to an intelligent heat load distribution control system and method for multi-unit cooperative heat supply. The intelligent heat load distribution control system comprises a cooperative heat supply mode input module which is used for obtaining the cooperative heat supply mode input of each heat supply unit according to the electric load and flow set value of each heat supply unit; the heat supply flow total demand quantity calculation module is used for calculating the heat supply flow total demand quantity according to the cooperative heat supply mode input of all the heat supply units, the heat supply flow total demand quantity is calculated; the cooperative heat supply unit heat supply flow distribution module is used for calculating a heat supply flow distribution value of each heat supply unit according to the heat supply flow total demand quantity, the load percentage of all heat supply units and cooperative heat supply mode input; and the unit heat supply flow control module is used for obtaining a pressure reduction regulating valve instruction of each heat supply unit according to the heat supply flow distribution value, the heat supply actual flow and cooperative heat supply mode input of each heat supply unit. According to the intelligent heat load distribution control system and method for multi-unit cooperative heat supply, the reliability and safety of the heat supply system can be improved, and it is guaranteed that the quality of steam for external heat supply is qualified.

Description

technical field [0001] The invention relates to the field of heat supply control, in particular to a heat load intelligent distribution control system and method for multi-unit cooperative heat supply. Background technique [0002] In recent years, my country's central heating has developed rapidly. Both the heating capacity and the scale of the heating network have greatly increased. The popularity and application areas of central heating are also becoming wider and wider. With the gradual improvement of national energy conservation and emission reduction requirements, in industrial agglomeration areas with large heat load requirements such as chemical industry, papermaking, printing and dyeing, and pharmaceuticals, by accelerating the construction of clean and efficient cogeneration projects and transforming existing large-capacity and high-parameter coal-fired units, Eliminate scattered coal-fired small boilers. Centralized heating is an important measure that can improv...

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Problems solved by technology

[0005] In the actual operation of the system, due to the error of pressure measurement, the loss along the pipeline, and the adjustment performance of the regulating valve, etc., this control method of simultaneously adjusting the pressure of the heating main pipe by multiple units often results in a serious imbalance in the distribution of the heating load of each unit. , one unit has reached the maximum heat supply, but the other unit has no heat load

A large amount of external heat supply for a single unit is not conducive to the AGC adjustment of the unit and the pass rate of primary frequency regulation

If the unit with the maximum heat supply momentarily withdraws from heat supply due to abnormal equipment, the pressure of the heating system will fluctuate greatly, and the steam quality will not meet the needs of heat users

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