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Synchronous tracking method of actually measured revolving speed and calculated revolving speed by generator excitation device

A technology of synchronous tracking and excitation device, applied in the field of power system, can solve problems such as difficulty in accurately adapting to various working conditions of generators, and achieve the effects of avoiding local minimum and dimensional disasters, short training time, and strong generalization ability.

Active Publication Date: 2015-03-11
BEIJING SIFANG JIBAO AUTOMATION
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Problems solved by technology

[0003] However, the above two methods have the problem that it is difficult to accurately adapt to various working conditions of the generator.

Method used

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  • Synchronous tracking method of actually measured revolving speed and calculated revolving speed by generator excitation device
  • Synchronous tracking method of actually measured revolving speed and calculated revolving speed by generator excitation device
  • Synchronous tracking method of actually measured revolving speed and calculated revolving speed by generator excitation device

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Embodiment Construction

[0014] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the synchronous tracking method of the generator excitation device disclosed by the present invention to the measured speed and the calculated speed is realized according to the following steps:

[0016] Step 1: preprocess the historical data of the calculated rotational speed and the measured rotational speed of the generator rotor, and use them as training samples and test samples of the support vector machine model respectively;

[0017] 1.1 calculate generator rotor speed; The present invention adopts traditional method to calculate generator calculation speed: traditional generator excitation device is to calculate electromagnetic power according to machine terminal voltage, stator current (three meter method or two meter method, depending on whether the analog quantity acquisition channel of th...

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Abstract

The invention discloses a synchronous tracking method of an actually measured revolving speed and a calculated revolving speed by a generator excitation device. The method comprises the following contents: preprocessing historical data of a calculated revolving speed and an actually measured revolving speed of a generator rotor as a training sample; utilizing the training sample to train a support vector machine model; calculating a predicted revolving speed through the support vector machine model data to be detected; using the predicted revolving speed as the actually measured revolving speed to perform synchronous tracking. The synchronous tracking method disclosed by the invention solves the problem that the computed result is inaccurate caused by the fact that when the revolving speed of the existing rotor is calculated, the transient process (or the transient state process) cannot be completely taken into consideration, and uses the calculated predicted revolving speed as the actually measured revolving speed to perform synchronous tracking, so as to prevent phenomenon of phase step or even generator tripping caused by loss of actual revolving speed measurement signals.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and relates to a synchronous tracking technology for tracking the actual measurement with the calculated amount of the rotor speed of the generator in the PPS4B model of the multi-band power system stabilizer or other industrial fields that need to obtain the rotation speed of the generator excitation device. Background technique [0002] An important input parameter of the multi-band power system stabilizer PPS4B model is the rotational speed, and the accuracy of the rotational speed directly affects the accuracy of the model. The traditional generator excitation device calculates the electromagnetic power based on the machine terminal voltage and stator current (three-meter method or two-meter method, depending on whether the analog quantity acquisition channel of the device collects B-phase current), and then calculates the electromagnetic power according to the active and reacti...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 张天侠高锐
Owner BEIJING SIFANG JIBAO AUTOMATION
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