Fast calculation method of tie-line transient state stable limiting transmission power

A power transmission and transient stability technology, applied in the field of power systems, can solve problems such as mismatching and operating mode uncertainty, and achieve the effects of high precision, wide application space, and convenient operation

Active Publication Date: 2011-04-27
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0006] Transient stability limit transmission power, as an important content of power system safety analysis, has been used in offline calculation and analysis for a long time, but because the traditional offline calculation method can only calculate hypothetical or some typical sections, and the actual operation mode is uncertain , so there is a mismatch problem when using the offline calculation results to guide the actual operation

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  • Fast calculation method of tie-line transient state stable limiting transmission power
  • Fast calculation method of tie-line transient state stable limiting transmission power
  • Fast calculation method of tie-line transient state stable limiting transmission power

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Embodiment Construction

[0063] The present invention mainly relates to the calculation of the post-accident static stability limit transmission power and fault impact power, and the transient stability limit transmission power of the tie line can be obtained by applying the formula (6) after calculating these two values.

[0064] Static stability limit transmission power is the most effective indicator of power grid strength. The static stability limit of the normal mode represents the maximum transmission capacity of the AC section. The static stability after the N-1 accident represents the ability of the system to withstand the impact of a large disturbance accident, and the N-2 The static stability after the accident is an important factor in determining the safety control device.

[0065] The practical algorithm of the static stability limit transmission power is to use the stability calculation program, use the quick-closing valve card, gradually increase the power of the sending unit or reduce t...

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Abstract

The invention relates to a calculation method suitable for tie-line transient state stable limiting transmission power. In the method, the transient state stable limiting transmission power just in one step through calculating the obtained accident static state stable limiting transmission power and the tie-line fault impact power. The calculation method provided by the invention has the same model applicability as the time domain simulation method and the same stability margin quantification as the direct method, the accuracy is higher, and the operation is convenient. The method can be used for calculating the estimated value of the transient state stable limiting transmission power, and has wide application range in the offline calculation, especially in the online application.

Description

technical field [0001] The invention belongs to the field of electric power systems, and proposes a method for quickly obtaining the transient stability limit transmission power of a tie line through the post-accident static stability limit transmission power and fault impact power. Background technique [0002] The transient stability transmission power limit is an important index to measure the stability of the power system. In the transient stability analysis and safety control analysis of the power system, it is often necessary to calculate this critical parameter of the system. The estimation and judgment of transient stability limit transmission power is an important basis for arranging the operation mode of the power system and grasping the system's transient stability capability. Its acquisition is conducive to providing extremely valuable information for system safety and economic dispatch and preventive control. [0003] At present, there are four main methods to o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 张文朝李岳赵兵张艳萍
Owner CHINA ELECTRIC POWER RES INST
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