Electric load demand control system and control method for heat treatment resistance furnace group

Abstract

The invention relates to a control system and a control method for electric load demand of a heat treatment resistance furnace group, which establishes an optimal database for electric load of a heattreatment furnace group of a temperature-raising, insulation and temperature-lowering resistance furnace. According to the heat treatment process of the furnace group, the corresponding electric furnace load scheme is called and compared with the feedback electric load of the electric power parameter acquisition module. The green area is 96% of the maximum demand of the collecting power supply busbar below that of the electric load. Maximum demand for power supply busbar is 96%- 98% state is yellow zone, and the refresh frequency of the instantaneous power and electric quantity value of eachfurnace demand quantity is increased to generate the maximum demand curve of the bus bar and the load curve of each electric furnace, and the load change is prejudged; When the maximum power supply busbar demand exceeds 98% of the maximum power load, the system prompts alarm and the state is red zone. According to 1- 5 heat treatment furnaces are divide into heating section and graded to reduce power for sequential selection, and that heat treatment process execution module is used to set the sequence and divide the heating section and graded to reduce power for short time, so as to ensure theheat treatment process to be executed and to adjust the working conditions of the heat treatment furnace in real time.

Description

technical field [0001] The invention relates to the technical field of power load demand control, in particular to a heat treatment resistance furnace group power load demand control system and control method that guarantees the power load of the furnace group to limit the maximum active power so as to meet the contracted power consumption value. Background technique [0002] In the workpiece heat treatment process, the resistance furnace group can be used to heat treat different batches of workpieces with different technologies and processes at the same time, and the heat treatment process execution control system is centrally managed. Resistance furnaces are also high-energy-consuming equipment. The Electric Power Bureau implements a two-part electricity price system for the resistance furnace group, that is, the electricity fee consists of two parts: the basic electricity fee and the electricity fee. The electricity fee is the electricity fee calculated according to the a...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the power load control adopted for heat treatment resistance furnaces is based on the production plan, power load, alarm and other information, and the telephone dispatch is carried out. The maximum demand for heat treatment resistance furnaces is not deeply understood, and corresponding means are lacking. To observe the relationship between the current load and demand, it is impossible to make a reasonable load adjustment plan in time to reduce the impact on demand, resulting in the out-of-synchronization between the execution of the heat treatment process and the power load, which not only reduces the power efficiency, but also exceeds the maximum demand. Temporarily adopt the method of opening and shutting off the power to ensure the satisfaction of the maximum demand constraint, which further increases the fluctuation of the electric load of the heat treatment resistance furnace group

Images