Power generator relay protection method and circuit

A relay protection and generator technology, applied in emergency protection circuit devices, protection against overcurrent, circuit devices, etc., can solve the problem of enlargement, misjudgment of generator 1 fault, and inability to accurately determine generator fault and other problems to achieve the effect of avoiding different characteristics and reducing impact

Inactive Publication Date: 2018-09-21
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, in the above method, when other generators in the data center fail, the current on the outlet side of the generator 1 (that is, the current flowing into the current relay 1) may increase, resulting in a misjudgment that the generator 1 has failed. Therefore, depending on the current on the outgoing side of the generator, it may not be possible to accurately determine whether the generator has failed

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  • Power generator relay protection method and circuit
  • Power generator relay protection method and circuit
  • Power generator relay protection method and circuit

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Embodiment Construction

[0041] In the embodiments of the present invention, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present invention shall not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

[0042] In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0043] First, some concepts involved in the generator relay protection method and circuit provided by the embodiment of the invention are explained.

[0044] Fault within the protection range: when the relay protection mechanism ...

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Abstract

The embodiment of the invention provides a power generator relay protection method and a device which are used for a scene of parallel operation of a plurality of power generators in a data center. Aneutral point grounding manner of the power generators is small resistance single-point grounding. The method comprises the steps of acquiring neutral point side current of the power generators, and outgoing line side current of the power generator, and determining whether the power generators have faults in a protection scope according to the neutral point side current, the outgoing line side current and action current of a differential current relay. The neutral point side current is current transformed by current transformers on neutral point sides of the power generators, and the outgoingline side current is current transformed by current transformers on outgoing line sides of the power generators.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of generators, in particular to a generator relay protection method and circuit. Background technique [0002] Diesel generators are used more and more widely in data centers, and the generator system of data centers usually uses multiple diesel generators running in parallel. In the case of parallel operation, the neutral point of the diesel generators can be different Grounding, or grounding through a small resistor. [0003] At present, the methods of grounding diesel generators through small resistances include multi-point grounding through small resistances and single-point grounding through small resistances. Multi-point grounding through small resistance means that the neutral point of each generator among multiple generators is grounded through small resistance; single-point grounding through small resistance means that only one generator among multiple generators is ground...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/06H02H3/08H02H1/00
CPCH02H7/062H02H1/0007H02H3/08
Inventor 刘锦波
Owner HUAWEI TECH CO LTD
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