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Method for locating prime motor disturbance source triggering forced power oscillation

A technology for forced power oscillation and disturbance source location, applied in AC network circuits, electrical components, circuit devices, etc., and can solve problems such as forced oscillation of power grids

Active Publication Date: 2011-08-31
NARI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Previous studies have pointed out that the mechanical power fluctuation of the prime mover is more likely to cause forced oscillation of the power grid than the load disturbance

Method used

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  • Method for locating prime motor disturbance source triggering forced power oscillation
  • Method for locating prime motor disturbance source triggering forced power oscillation
  • Method for locating prime motor disturbance source triggering forced power oscillation

Examples

Experimental program
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Embodiment Construction

[0018] Attached below figure 1 , the method of the present invention is described in detail.

[0019] figure 1 Step 1 in the above describes that the speed of each generator collected by the PMU is collected by the control center according to a unified time scale ωi , mechanical power Pmi and electrical power Pei Pei time response curve. ;

[0020] figure 1 The step 2 described in is to identify the coherence group according to the measured trajectory, and mark it as S Group and A group, through the complementary group center of inertia relative motion transformation (CCCOI-RM) of the extended equal-area criterion (EEAC), the measured multi-machine trajectories are mapped to the plane of the one-machine-infinity (OMIB) mapping system, and the equal Value mechanical input power ( PMs and Pma ), equivalent electrical output power ( Pes and Pea ) and the trajectory of the motion velocity of the center of inertia ( ωs and ωa ). ;

[0021] figure 1 Step...

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Abstract

The invention, which belongs to the field of the power system and automation technology thereof, provides a method for locating prime motor disturbance source triggering forced power oscillation. The invention employing the system disturbed trajectory collected by wide area measurement system (WAMS) locates a disturbance source according to the phase relation characteristic between the system response trajectory and the disturbance motivation trajectory, so as to provide a decision support to the electric power system dispatching and operating control. The beneficial effects of the invention lies in that the method, which can solve the problem of distinguishing the response and motivation from the actual measurement system dynamic trajectory, has characteristics of less calculation and simple analysis procedure, so as to provide the intuitive reference for power system operating control and improves the practicability of the WAMS.

Description

technical field [0001] The invention belongs to the technical field of electric power system and automation thereof. More precisely, the invention relates to a method for locating a disturbance source of a prime mover that causes forced power oscillation. Background technique [0002] The power system forced power oscillation theory points out that continuous periodic small disturbances will cause forced oscillations in the power system, and when the disturbance frequency is close to the natural frequency of the system, it will cause system resonance and lead to large-scale power oscillations. [0003] In recent years, wide area measurement systems (WAMS) based on synchrophasor measurement units (PMUs) have been increasingly widely used. Although each power grid has its own focus on the issues concerned, the scale and depth of WAMS research and construction are also different. They are not the same, but almost without exception, power system oscillation monitoring is regarde...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 方勇杰薛禹胜徐泰山李兆伟杨卫东鲍颜红薛峰李碧君许剑冰
Owner NARI TECH CO LTD
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