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Generator power transmission device and transmission method based on comprehensive harmonic fault identification

A generator power and fault identification technology, applied in the field of electric power system, can solve the problems of output error power and easy saturation of measurement level CT, and achieve the effect of solving output error power and improving sensitivity

Active Publication Date: 2018-09-11
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a generator power transmission device and transmission method based on comprehensive harmonic fault identification, which can effectively solve the problem that the measurement level CT is easily saturated and output wrong power, and output correct power

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  • Generator power transmission device and transmission method based on comprehensive harmonic fault identification
  • Generator power transmission device and transmission method based on comprehensive harmonic fault identification
  • Generator power transmission device and transmission method based on comprehensive harmonic fault identification

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] The invention provides a generator power transmission device based on comprehensive harmonic fault identification, which includes a detection unit, a calculation unit and a judgment unit, wherein the detection unit is used to detect the three-phase voltage of the voltage transformer at the generator terminal, and the terminal measurement Level current transformer three-phase current and machine terminal protection level current transformer three-phase current.

[0029] The calculation unit is used to calculate the fundamental phasor of the three-phase voltage of the generator terminal voltage transformer and the fundamental phasor of the three-phase current of the terminal measurement level current transformer according to the voltage and current obtained by the detection unit and the fundamental phasor of the three-phase current of ...

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Abstract

The invention discloses a generator power transformission apparatus and transformission method based on integrated harmonic wave fault identification. Firstly generator machine end voltage transformer three-phase voltage, machine end measurement scale current transformer three-phase current and machine end protection level current transformer three-phase current are collected in real time; then the fundamental wave phase of the generator machine end voltage transformer three-phase voltage, the fundamental wave phase of the machine end measurement scale current transformer three-phase current, the fundamental wave phase of the machine end protection level current transformer three-phase current, a generator power 1, a generator power 2, and nth-degree harmonic component amplitude (n is 2, 3, or 5) in measurement level current transformer three-phase current are calculated; a harmonic wave component fault identification criteria is employed, if a criteria function is invested and the criteria is satisfied, the generator power 2 is outputted, otherwise the generator power 1 is outputted. According to the method, the problem of outputting wrong power caused by measurement level CT easy saturation can be solved, and correct power is outputted.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a generator power transmission device and transmission method based on comprehensive harmonic fault identification. Background technique [0002] The traditional generator power transmitter collects the generator terminal voltage and the current transformer current of the machine terminal measurement level, and uses the time division multiplier principle to generate an analog power signal, which is supplied to the distributed control system (DCS) of the unit and the digital electro-hydraulic control of the steam turbine. system (DEH) used. When a fault occurs outside the unit area or an adjacent transformer runs out, due to factors such as a large fault current or non-periodic components, the current waveform of the measuring-level current transformer at the generator end is distorted, resulting in the power transmitter being unable to be true. Respond to the current pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/00H02P101/20G01R23/16G01R21/06G01R31/34
CPCG01R21/06G01R23/16G01R31/343H02P9/006H02P2101/20
Inventor 黄晓明陈俊杨涛王光陆承宇李华忠王松王凯方芳柯人观丁峰汪冬辉罗华峰孙祥祥
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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