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Energy storage frequency converter system

A frequency converter and energy storage technology, which is used in current collectors, conversion equipment for intermediate conversion to DC conversion, emergency power supply arrangements, etc. utilization, and the effect of improving system reliability

Inactive Publication Date: 2018-01-30
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide an energy storage frequency converter system to solve the technical problems of high power loss rate and poor stability in the current uninterrupted power supply scheme

Method used

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Examples

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Embodiment

[0034] Example description

[0035] In the embodiment of the present application, firstly, the AC mains is rectified by each rectifier module in the rectifier device to output rectified DC power or the battery DC power is directly output through the battery device, and then the rectified DC power and / or the battery DC power is passed through the inverter and frequency conversion device. The frequency is converted into alternating current, and then output to the load motor, which is improved into an energy storage inverter, which reduces the number of power conversions and improves the power conversion efficiency.

Embodiment 1

[0038] Please refer to figure 1 , which is a schematic structural diagram of the UPS uninterruptible power supply scheme in the prior art. The mains grid inputs AC mains to the UPS, and then outputs it to the inverter after passing through the UPS, and finally reaches the motor. In this process, the UPS first converts the alternating current (AC) into direct current (DC) for the first time, and then converts it into alternating current (AC) for the second time together with the direct current (DC) output by the backup battery for output. Before the motor, it needs to go through the frequency conversion of the frequency converter to adjust the load and reduce the starting current, so as to improve the operation efficiency of the motor; (AC) performs a third alternating current (AC) to direct current (DC) conversion and a fourth direct current (DC) to alternating current (AC) conversion before being finally input to the motor. That is to say, in the whole power transmission proc...

Embodiment 2

[0045] Please refer to Figure 4 , is a schematic structural diagram of the energy storage inverter system according to the second embodiment of the application, and this embodiment is based on the first embodiment.

[0046] The rectifier device 105 includes a plurality of rectifier modules 100 connected in parallel with each other. Each of the rectifier modules 100 is respectively connected to the AC mains and outputs the rectified DC power to the inverter and frequency conversion device 107 . The number of the rectifier modules 100 is determined by the rated power of the load motor 109, and redundant settings are performed according to system reliability requirements. Here, the rectifier modules 100 performing mains rectification share the operating power of the load motor 109. For example, the operating power of the load motor 109 is 1000W, and the number of the rectifier modules 100 participating in rectification at this time is It is generally set according to the reliab...

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Abstract

The invention discloses an energy storage frequency converter system. The system comprises a rectification device, an inversion frequency conversion apparatus and a cell apparatus. An input terminal of the rectification device is connected to an alternating current, an output terminal is connected to an input terminal of the inversion frequency conversion apparatus, and a rectified direct currentafter rectification of the alternating current via the rectification device is output to the inversion frequency conversion apparatus. An output terminal of the cell apparatus is connected to an inputterminal of the inversion frequency conversion apparatus and outputs a cell direct current to the inversion frequency conversion apparatus. An output terminal of the inversion frequency conversion apparatus is connected to a load motor and outputs the rectified direct current which is output by the inversion frequency conversion apparatus to the rectification device to the load motor or a frequency-conversion alternating current after frequency conversion of the cell direct current output by the cell apparatus to the load motor when an alternating current stops power supply. In a current uninterruptible power supply scheme, a power loss rate is high and stability is poor. By using the energy storage frequency converter system of the invention, the above technical problem is solved.

Description

technical field [0001] The present application relates to a data center power supply technology, in particular to an intelligent energy storage inverter system for supplying power to a data center load motor. Background technique [0002] The data center accommodates a large number of IT equipment and IT systems. IT systems are used to transmit, accelerate, display, calculate, and store data information on the Internet network, IT equipment and other infrastructures, which play a crucial role in the Internet era. At present, the cooling facilities such as water pumps, chillers and air conditioners in the data center room are equipped with frequency converters. The main purpose is to use frequency converters to adjust the load and reduce the starting current. In order to ensure that the data center does not overheat during the time interval of abnormal power failure, high-density data centers have to configure uninterruptible power supplies and battery packs for all precision...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02M5/40H02J7/02
Inventor 沈烨烨刘水旺
Owner ALIBABA GRP HLDG LTD
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