Control and regulation system and method in plant-level thermoelectric unit combined heat supply mode

Abstract

The invention provides a control and regulation system and method in a plant-level multi-unit combined heat supply mode, and belongs to the technical field of heat supply unit control. The method comprises the following steps of: calibrating return water temperature, and performing additive operation on the return water temperature and a water supply temperature set value to obtain a first operation value; comparing the first operation value with the water supply temperature, carrying out proportional integral operation according to the obtained numerical deviation state, and obtaining a second operation value; performing numerical conversion on the first operation value through a feedforward function to obtain a feedforward value; accumulating the second operation value and the feedforward value to obtain a third operation value; performing balance calculation on the third operation value and an adjustment instruction average value under the joint control of multiple units to obtain abalance adjustment instruction; and tracking a state data flow of a manual operator of each heat supply unit, and sending the balance adjustment instruction to the manual operator of the heat supplyunit in an automatic control state. Setting of the water supply temperature is automatically corrected and sent to a controller, heat supply network loss is reduced, and energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of thermal power unit heat supply regulation, in particular to a control and regulation system and method in a plant-level multi-unit joint heat supply mode. Background technique [0002] In recent years, with the continuous advancement of urbanization, the heating area of ​​northern residents has continued to increase. At present, most of the direct regulation units in the power grid are heating units. The heating units are limited by the lack of flexible adjustment capacity of heat load demand. At the same time, the installed capacity of new energy continues to grow, and the characteristics of new energy power generation require conventional units to participate in grid regulation and absorb new energy. [0003] There are generally two or more heating units in a power plant. When multiple units participate in the regulation, if most of them are manually adjusted or the automatic adjustment parameters are n...

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Problems solved by technology

[0003] There are generally two or more heating units in a power plant. When multiple units participate in the regulation, if most of them are manually adjusted or the automatic adjustment parameters are not matched properly, the heating control will not be timely; when participating in peak regulation, the minimum heating unit is required When the quantity is large, the adjustment between units needs to be timely and fast

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