System and method for controlling maximum demand on multiple power supply lines

Abstract

The invention, which relates to the power measurement technology, especially to electricity consumption metering and control of the multi-path power supply lines, provides a system and method for controlling a maximum demand of multi-path power supply lines, wherein the system and method are used for controlling power consumption during line repairing and maintenance or line switching. According to the system, a computer is connected with an electromagnetic switch in an equipment switch cabinet; and the system also includes a real-time multi-path power supply line maximum demand calculating device connected with the computer. The real-time multi-path power supply line maximum demand calculating device includes a processor, an interface connected with the computer, and an electricity usage information reading interface; the electricity usage information reading interface is connected with at least two paths of power supply lines or electric energy meters of the power supply lines. The method comprises: priority levels of equipment are set; one piece of equipment that will be turned off is selected according to the priority levels of equipment; total loads of the power supply lines are compared; when a requirement is met, the turning off of the equipment is stopped and the power interruption is prompted to be carried out. According to the system, too much manual intervention is not required and some devices can be selected and turned off automatically, thereby avoiding the unreal increase of the maximum demand.

Description

technical field [0001] The invention relates to power measurement technology, in particular to the power consumption measurement and control of multiple power supply lines. Background technique [0002] Due to the heavy load, large enterprises are powered by two or more lines at the same time, and their basic electricity charges are charged according to the maximum demand. According to the requirements of the power company, for users with two or more incoming lines whose maximum demand charges the basic electricity fee, the maximum demand of each incoming line is calculated separately, and the basic electricity fee is charged accumulatively. [0003] Demand refers to the average value of power over a specified time interval. Maximum demand refers to the maximum value of demand recorded in a specified cycle or billing cycle. [0004] Demand is a measure of power, or more precisely an average power. The specified time interval is the demand period. The demand period in our...

AI Technical Summary

Problems solved by technology

[0010] The existing problem is: when there is line maintenance or line switching, etc., one line of power supply will be cut off, and the power load will be added to another line or several lines. At this time, the maximum demand will be inflated on the working line. The maximum demand has not changed, but the charging benchmarks on some lines have changed, resulting in unreasonable charging and causing losses to the enterprise

[0012] 1. Some equipment cannot be shut down, and manual selection will inevitably lead to wrong shutdown

[0013] 2. There are few closed devices, and the maximum demand will be inflated after one power supply is cut off.

[0014] 3. There are too many closed devices, which will cause greater losses to the production and operation of the enterprise

[0015] 4. The closed equipment may affect the normal operation of the closed equipment and cause losses

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