Hybrid accumulator for elevator and control method thereof

A hybrid energy storage, charge and discharge control technology, applied in the direction of circuit devices, battery circuit devices, motor generator control, etc., can solve the problems of prolonging the discharge time of emergency power supply, not providing the combination scheme of energy storage devices and energy management methods, etc. , to achieve the effect of optimizing the charging and discharging process, good technical performance, and fast charging and discharging speed
CN1835329AInactive Publication Date: 2006-09-20INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Publication Date
2006-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The mixed energy storage device for elevator includes super capacitor bank, accumulator set, super capacitor charging and discharging circuit, charging and discharging circuit for accumulator. Through super capacitor charging and discharging circuit, super capacitor bank is connected to DC bus in power supply system for elevator. Through charging and discharging circuit for accumulator, accumulator set is connected to DC bus. Using circuits for controlling charging and discharging super capacitor and accumulator, the invention realizes uninterrupted power supply and power buffering. Features are: minimizing installed capacity of super capacitor bank and accumulator set, optimizing working state of charging and discharging accumulator set, reducing number of charging and discharging cycle and prolonging service life etc. In the mixed energy storage device, accumulator set exchanges energy with DC bus only through one stage of DC / DC so as to raise efficiency of storing energy greatly.
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Description

technical field

[0001] The invention relates to a hybrid energy storage device and a control method thereof, in particular to a hybrid energy storage device for an elevator and a control method thereof. Background technique

[0002] In the drive system of the elevator, the electric energy of the grid is generally directly rectified and confluent to the DC bus to form a DC power supply system, which is then inverted by a frequency converter to generate a three-phase alternating current with variable voltage and frequency to drive the motor. Since the motor will absorb a large amount of power from the DC bus when it starts or accelerates, the terminal voltage of the DC bus will decrease; and when it stops or decelerates, it will feed back power to the DC bus because the motor is in the power generation state, resulting in a rise in the bus voltage. high. If the DC bus voltage fluctuates too much, it will affect the working performance of the frequency converter and elevator a...

Claims

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