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Method and device for measuring parameters of inner potential and reactance of synchronous generator

A synchronous generator, synchronous phasor measurement technology, applied in measurement devices, measurement of resistance/reactance/impedance, measurement of electrical variables, etc., can solve problems such as inaccurate measurement results

Inactive Publication Date: 2015-01-07
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0008] Embodiments of the present invention provide a method and device for measuring the internal potential of a synchronous generator and identifying reactance parameters, so as to solve the current problem of inaccurate and relatively large errors in the measurement results of the internal potential amplitude detected by the indirect electrical method

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  • Method and device for measuring parameters of inner potential and reactance of synchronous generator
  • Method and device for measuring parameters of inner potential and reactance of synchronous generator
  • Method and device for measuring parameters of inner potential and reactance of synchronous generator

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Embodiment Construction

[0059] 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 some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] Such as figure 1 As shown, the embodiment of the present invention provides a method for measuring the potential and reactance parameters in a synchronous generator, including:

[0061] Step 101. Obtain the terminal voltage phasor of the synchronous generator by measuring the synchronized phasor measuring device terminal current phasor Generator power angle δ and machine terminal voltage value U.

[0062] Step 102, according to the terminal voltage...

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Abstract

The embodiment of the invention discloses a method and device for measuring parameters of the inner potential and the reactance of a synchronous generator and relates to the technical field of power system synchronous phasor measurement. The method comprises the steps that a generator end voltage phasor U( ), a generator end current phasor I( ), a generator power angle delta and a generator end voltage value U of the synchronous generator are measured and obtained through a synchronous phasor measuring device; a generator end power factor angle phi is generated according to the generator end voltage phasor U( )and the generator end current phasor I( ); the inner potential amplitude Eq of the synchronous generator is determined according to the generator power angle delta, the generator end voltage value U and the generator end power factor angle phi. The method and device can solve the problem that the inner potential amplitude is calculated through an indirect electric method currently, the result is not accurate, and large errors exist.

Description

technical field [0001] The invention relates to the technical field of synchronous phasor measurement in electric power systems, in particular to a method and device for measuring potential and reactance parameters in a synchronous generator. Background technique [0002] A synchronous generator is an AC synchronous motor that converts mechanical energy into electrical energy. Synchronous generators are the most commonly used generators in modern power systems. The characteristics of this generator are excited by DC current, and its rotor speed is the same as that of the rotating magnetic field. The synchronous generator is an important dynamic element in the power system, and its dynamic characteristics have a great influence on the operation performance of the power system. The magnitude and phase of the electric potential in the generator are one of the main state variables that characterize the dynamic process of the power system. The trajectory is of great significance...

Claims

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Application Information

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IPC IPC(8): G01R19/06G01R27/02
Inventor 王茂海
Owner STATE GRID CORP OF CHINA
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