Large electric network on-line preventing control method based on static state and transient safety steady mode

It is a technology of transient safety, stability and preventive control. It is applied in electrical components, circuit devices, AC network circuits, etc., and can solve the problem that preventive control technology cannot be applied online.

Active Publication Date: 2008-11-05
NARI TECH CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing preventive control technology in the power system that cannot be applied online, and provide an online preventive control method for large power grids based on static and transient security and stability modes

Method used

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  • Large electric network on-line preventing control method based on static state and transient safety steady mode
  • Large electric network on-line preventing control method based on static state and transient safety steady mode
  • Large electric network on-line preventing control method based on static state and transient safety steady mode

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Embodiment Construction

[0018] The method of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] The flow of the preventive control coordination method based on the safe and stable model is as follows: figure 1 shown.

[0020] In an embodiment of the present invention, a method for determining a safe stable mode and a restrictive fault is disclosed. The dynamic behavior of large multi-machine power systems is very complex. When faults occur at different locations in the system, they often present different instability modes. The EEAC theory starts from the trajectory of the multi-machine system and divides the system into a pair of dominant complementary groups {critical group S, remaining group A}, which describe the instability mode of the system. The same kind of control measures applied in the critical group S has the opposite effect on the stability of the system compared with the remaining group A, and multiple fault scenarios with the...

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Abstract

A power pool online precaution control method based on the static state and the transient safe stable mode, includes: 1) obtaining the transient state process, 2) seeking the transient state and the static state safety margins, 3) performing the pattern classification to the failure, 4) trying to the obtain the adjusting project which satisfies all the failure modes, 5) computing the participation factor of the unsafe candidate control measurement of the transient state voltage and the frequency and sorting, 6) computing the sensitivity of the participation factor of each overload candidate control measurement after the failure and sorting, 7) obtaining the new mode data after adjustment and checking the safety of the static state and the transient state. The invention performs the coordination optimization among the transient power angle, the transient voltage / frequency and the static state device overload precaution control through integrating the control measurement participation factor of each mode, obtains the optimized safe and stable precaution control measure for satisfying the practical requirement of the engineering.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to an online preventive control method for large power grids based on static and transient security and stability modes. Background technique [0002] When individual components in the large power grid system are out of service or the load changes, the system strength is weakened, and the operation of the system can no longer withstand common single fault disturbances, the system enters the alert state. The power system at this time is very fragile, and the operation mode should be adjusted as soon as possible to return to the normal state. The control that restores from the alert state to the normal state is called preventive control. [0003] Preventive control is aimed at a variety of possible fault conditions in a certain operating mode of the large power grid system. The goal is to change the operating point of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/00G06F17/50
CPCY04S10/545Y02E60/76Y02E40/76Y04S40/22Y02E60/00
Inventor 徐泰山刘华伟鲍颜红李海峰李碧君苏大威
Owner NARI TECH CO LTD
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