Elevator colony electric energy dispatching device and method based on direct-current microgrid

Abstract

The invention discloses an elevator colony electric energy dispatching device and method based on a direct-current microgrid. When a traditional elevator runs, the regenerated electric energy of the elevator is dissipated mainly by means of a bleeder resistor, or fed back to a grid, or stored completely for reuse. According to the energy-saving regenerated electric energy dispatching device and method for an elevator colony comprising two or more elevators, the intelligent building direct-current microgrid is established, regenerated electric energy is dispatched to an elevator serving as a load, so that regenerated electric energy is directly utilized, electric energy is prevented from being fed back to the grid, and the problem of high cost of a system caused by complete storage of regenerated energy is solved. By dispatching the regenerated electric energy of the elevator colony, energy saving is achieved for elevators, and then energy saving is achieved for intelligent buildings.

Description

technical field [0001] The invention relates to an elevator energy-saving device and method, in particular to an energy-saving device and method for utilizing regenerative electric energy of cluster elevators / elevator groups. Background technique [0002] In the existing building power distribution system, when considering the elevator, it is only used as a load. In order to fully consider that the motor of the elevator equipment works in different states, it will actually appear as a power supply, and this Portions of energy are plentiful. Due to grid constraints, technical design flaws, etc., usually this energy is simply wasted in engineering. [0003] Elevator energy-saving solutions have made progress from different angles. The four-quadrant operation of the elevator, such as figure 1 shown. Upward running includes 3 working states: electric, power generation deceleration and positive feedback braking. Downward running also includes 3 working states: electric, powe...

AI Technical Summary

Problems solved by technology

[0015] Store the regenerated electric energy of the elevator, and then directly supply it to the elevator or other DC equipment for reuse (such as patent 201010251559.9). Compared with the method of feeding the regenerative electric energy back to the grid, this method can avoid the inverter link, has higher utilization efficiency, and has obvious technical advantages; but this method, To store all the regenerative electric energy of the elevator, the charging and discharging current is large and the speed is fast. Traditional batteries are difficult to use as energy storage devices, and energy storage devices that can charge and discharge quickly such as supercapacitors are needed (such as patent 201020607246.2), and the cost of supercapacitors is high.

It can be seen that although this method has technical advantages, it is costly and unacceptable to users, and there are few such products in the market.

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