A power unit bus bar pressure equalization system

A technology of power unit and busbar, applied in the field of power unit busbar voltage equalization system, can solve the problem of forced shutdown of the system, and achieve the effect of keeping the busbar voltage consistent

Active Publication Date: 2016-03-16
INVT POWER ELECTRONICS SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the two power units of this phase will stop working, and the system will be forced to stop.

Method used

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  • A power unit bus bar pressure equalization system
  • A power unit bus bar pressure equalization system
  • A power unit bus bar pressure equalization system

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] The embodiment of the present invention discloses a power unit bus voltage equalization system, which can realize that when a certain power unit fails in one of the power unit control circuits, the power consumption of the power units in the other power unit control circuits can be kept consistent. Furthermore, it is realized that the bus voltages of the power units in the control circuits of each power unit can be kept consistent.

[0040] Suc...

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Abstract

The invention discloses a power unit bus voltage equalizing system comprising a controller and two or more power unit control circuits. Each power unit control circuit comprises a first power unit, a second power unit, a first isolation step-down power circuit, a second isolation step-down power circuit, a first switch, a second switch, a first voltage detection circuit, a second voltage detection circuit, a first power unit control circuit, a second power unit control unit, a first discharge circuit and a second discharge circuit. The power unit bus voltage equalizing system has the advantages when one power unit in the one power unit control circuit fails, power consumptions of the power unit control circuits can be uniform; accordingly, bus voltages of the power units in the power unit control circuits can be consistent.

Description

technical field [0001] The invention relates to the technical field of power electronics, and more specifically, relates to a power unit bus bar voltage equalization system. Background technique [0002] In the high-voltage chain structure such as frequency converter and SVG, the unit connection mode is divided into delta and star, which are divided into three phases in total, and each phase connection is composed of N power units. In commonly used inverters, SVG and other high voltage chain structure equipment, in order to reduce the cost and improve the redundancy of the control circuit, most of the adjacent power units are powered by each other. This connection method can ensure that when one of the power units bypasses the power unit due to a fault, the primary power supply board of the adjacent power unit can supply power to the control circuit board of the power unit, ensuring that other power units of this phase can continue to work . [0003] However, there are ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
Inventor 王佳庆李肇帆凡念
Owner INVT POWER ELECTRONICS SUZHOU CO LTD
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