High voltage large power uninterrupted power supply

A high-power, power supply technology, applied in current collectors, electric vehicles, electrical components, etc., can solve the problems of electrical appliances that cannot meet high-power, unstable output voltage, low efficiency, etc., and achieve the elimination of steady-state and dynamic voltage equalization problem, reduce low-order harmonics, and have strong anti-interference performance

Inactive Publication Date: 2002-11-06
青岛创统科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional uninterruptible power supply (UPS) has the following shortcomings and deficiencies: the output power is small, generally below hundreds, tens, or several KW or even smaller, it is difficult to make it large, and it cannot meet the requirements of high-power electrical appliances, especially important experiments. Room and some important equipment need for uninterruptible power supply; low voltage cannot meet the needs of high-voltage electrical appliances for uninterruptible power supply; current waveform is poor, high-order and low-order harmonics are very rich, and the power factor under load Low, often less than 0.9 or even lower; poor output stability, unstable output voltage, and it is difficult to achieve more than 10,000 stability; low efficiency, generally less than 0.9 or even smaller
In addition, the existing uninterruptible power supply structure is not reasonable enough. When a part of it fails, the whole machine often stops working and needs to be repaired.
The above-mentioned existing uninterruptible power supply is difficult to meet the requirements of various electrical appliances for uninterruptible power supply

Method used

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  • High voltage large power uninterrupted power supply

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1. A kind of high-voltage high-power uninterruptible power supply, such as figure 1 shown. It consists of a housing and electrical circuits installed in the housing. The electrical circuit is composed of a three-phase AC input circuit and a power unit module circuit connected with the three-phase AC input circuit. The power unit module consists of a rectifier, a DC filter capacitor, an IGBT single-phase full-bridge inverter, a battery pack connected in parallel to the output of the rectifier, and a charger connected to the three-phase AC input circuit and the battery pack.

Embodiment 2

[0028] Embodiment 2. A kind of high-voltage high-power uninterruptible power supply, such as figure 2 shown. Its three-phase AC input circuit is a three-phase isolation transformer. The power unit module circuit is composed of 6 power unit modules. Each phase has 2 power unit modules connected in series. The power unit module circuit is also connected with the reactor and the three-phase output transformer successively. Each power cell module uses an independent charger.

Embodiment 3

[0029] Embodiment 3. A kind of high-voltage high-power uninterruptible power supply, such as image 3 shown. Its three-phase AC input circuit is a phase-shifting transformer. The power unit module circuit is composed of 12 power unit modules, and each phase has 4 power unit modules connected in series. The power unit module circuit is also respectively connected with the three-phase output transformer and the controller, and the controller is composed of an interconnected single-chip circuit, an industrial control computer and a logic program controller. Its input voltage is 3KV. Each power cell module uses an independent charger.

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PUM

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Abstract

A high-voltage and high-power uniterrupted power source has its circuit consisting of a three-phase AC input transformer and a power unit module circuit which is composed of 6 power unit modules and each of them consisting of rectifier, DC filter capacitor, IGBT single phase full bridge inverter, storage battery set and electric charger, each phase having 2 power unit modules connected in seriesand connected in front or rear with reactor and three-phase output transformer or is composed of 12, 15 or 21 power unit modules, each correspondingly having 4,5 or 7 power unit modules connected in series and connected with three-phase output transformer and controller separately for the individual charger being used by each independently. The controller is composed of a chip circuit connected to each other, industrial computer and logic program controller.

Description

technical field [0001] The invention belongs to the technical field of power electronic power supply, and more specifically relates to a high-voltage high-power uninterruptible power supply manufactured by a new high-voltage frequency conversion technology. Background technique [0002] The traditional uninterruptible power supply (UPS) has the following shortcomings and deficiencies: the output power is small, generally below hundreds, tens, or several KW or even smaller, it is difficult to make it large, and it cannot meet the requirements of high-power electrical appliances, especially important experiments. Room and some important equipment need for uninterruptible power supply; low voltage cannot meet the needs of high-voltage electrical appliances for uninterruptible power supply; current waveform is poor, high-order and low-order harmonics are very rich, and the power factor under load Low, often less than 0.9 or even lower; poor output stabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/10
Inventor 刘同利隋学礼
Owner 青岛创统科技发展有限公司
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