Moving die test method by use of restraint subsynchronous resonance (SSR) device

A technology of subsynchronous oscillation and dynamic model test, which is applied in the field of dynamic model test and can solve problems such as economic and social benefit impacts

Active Publication Date: 2011-07-06
CHINA SHENHUA ENERGY CO LTD +6
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The most direct hazard of subsynchronous oscillation is the twisting of the shafting of the generator set, which has a huge impact on economic and social benefits
At present, there is no feasible laboratory dynamic model test method

Method used

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  • Moving die test method by use of restraint subsynchronous resonance (SSR) device
  • Moving die test method by use of restraint subsynchronous resonance (SSR) device
  • Moving die test method by use of restraint subsynchronous resonance (SSR) device

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Embodiment Construction

[0013] Such as figure 1 As shown, the system for realizing the dynamic model test method in a specific embodiment of the present invention includes the following components: frequency converter 101, asynchronous motor 102, speed measuring gear 103, synchronous generator 104, speed measuring background analysis device 105, speed measuring sensor 106, Suppress the subsynchronous oscillation device 107 and grid-connected equipment 108 .

[0014] In the dynamic model test method of a specific embodiment of the present invention, the three-phase asynchronous motor 102 is started by the constant torque closed-loop control of the frequency converter (the output of the frequency converter is superimposed with sub-synchronous torque), and the asynchronous motor 102 drives the synchronous power generation The generator 104 performs grid-connected power generation through the grid-connected equipment 108. The rotational speed of the synchronous generator 104 is measured, and the superim...

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Abstract

The invention discloses a moving die test method by use of a restraint subsynchronous resonance (SSR) device, which comprises the following steps of: starting a frequency converter, generating a signal with the preset frequency by a signal generator, and adding the signal into a control device of the restraint SSR device so as to activate a generator to generate torsional vibration; measuring thephase difference between the signal generated by the signal generator and a feedback signal of a unit rotation speed so as to determine a correction parameter for phase correction; generating a subsynchronous signal by the frequency converter, and switching the restraint SSR device to a restraint state; superimposing a subsynchronous torque with the preset frequency in the output torque of the frequency converter, switching the restraint SSR device to a closed-loop restraint state, and monitoring the subsynchronous rotation speed signal with the preset frequency of the generator; if the subsynchronous rotation speed signal with the preset frequency of the generator is monitored and attenuates to the preset amplitude, finishing the step; and if the subsynchronous rotation speed signal doesnot attenuate to the preset amplitude, returning to the step d to adjust the correction parameter so that the subsynchronous rotation speed signal attenuates.

Description

technical field [0001] The invention relates to a dynamic model test method, in particular to a dynamic model test method using a subsynchronous oscillation suppression device. Background technique [0002] Subsynchronous oscillation (SSR) is a very common and harmful low-frequency oscillation in power systems, and its causes are very complicated. Through theoretical and practical analysis, it is shown that long-distance power transmission, series compensation compensation of transmission lines, AC-DC hybrid power supply and the widespread use of power electronic equipment in power transmission systems are the main reasons for subsynchronous oscillation. [0003] The most direct hazard of subsynchronous oscillation is the twisting of the shafting of the generating set, which has a huge impact on economic and social benefits. At present, there is no feasible laboratory dynamic model test method. Contents of the invention [0004] Aiming at the defects of the prior art, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02P9/00
Inventor 张银山林惊涛左强卓华顾强安万洙王绍德武云生李鹏刘爱晶俞海焦东亮韩俊彪王少波李旷李兴
Owner CHINA SHENHUA ENERGY CO LTD
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