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Method for measuring real-time power-angle and power generator

A measurement method and generator technology, applied in the direction of motor generator testing, etc., can solve problems such as radial vibration

Inactive Publication Date: 2002-11-20
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When applying this measurement method, there is no need for construction on the generator set, so it will not have any impact on normal production, and it solves the problem of radial vibration in other methods

Method used

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Examples

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Embodiment Construction

[0013] The specific embodiment of generator real-time power angle and rotor position measurement method of the present invention is as follows:

[0014] 1. Use the GPS clock signal receiver to receive the clock signal provided by the global positioning system GPS, and obtain an accurate and fully synchronized clock reference in a wide range.

[0015] 2. Use the voltage and current phasor measuring device at T 0 Measure the voltage phasor on the three-phase bus of the generator at all times 0 and current phasor . Based on the measured voltage and current phasors, the equivalent circuit model is calculated at T 0 Generator power angle δ at time 0 and generator rotor position θ 0 , as the benchmark for subsequent measurement of real-time power angle. this T 0 The condition that must be met at all times is that the generator is in steady state operation.

[0016] In the equivalent circuit model, calculate T 0 Time generator power angle δ 0 and generator rotor position ...

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Abstract

The invented method adopts the clock signal provided by GPS system as time reference, utilizes the velocity-measuring device of power generator self-body to accurately measure rotating speed of generator, and calculates the change condition of generator rotor position in the mode of integrating rotating speed and calculates integration constant (i,e, initial power-angle) in the equivalent circuitmodel so as to further obtain the real-time power angle of power generator and rotor position. Said invention method is easy to implement in engineering and possesses strong in-situ anti-interferencecapacity, and can be extensively ap9plicable to turbo-unit and hydroturbine unit.

Description

(1) Technical field [0001] The invention relates to a method for directly measuring the real-time power angle of a generator by using a GPS global positioning system and a rotational speed measuring device. (2) Background technology [0002] In the engineering research of power system, the generator's power angle and rotor position are very important operating state quantities. When monitoring the safety and stability of a large-scale power grid, the relative power angle swing between units is an important basis for judging the stability of a multi-machine system. In terms of power flow calculation, if the power angle is known, it will save a lot of calculation time and improve the calculation accuracy. In the online identification of generator parameters, if the power angle or rotor position is taken as an observation quantity and combined with the least square method, the relevant parameters of the motion equation can be successfully identified. In addition, in the phase...

Claims

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Application Information

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IPC IPC(8): G01R31/34
Inventor 严登俊鞠平吴峰韩敬东
Owner HOHAI UNIV
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