Method and device for determining stability of voltage-source-type converter station connected multi-feed-in system

A voltage source type, converter station technology, applied in AC network voltage adjustment, power transmission AC network, reactive power compensation, etc., can solve the problem of difficult to accurately evaluate the static voltage stability of hybrid double-infeed systems, and difficult to take into account the commutation bus The impact of voltage stability and other issues

Active Publication Date: 2019-08-16
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0006] It can be seen from the above formula that ESCR can only quantitatively reflect the reactive power provided by the condenser, and it is difficult to take into account the influence of the

Method used

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  • Method and device for determining stability of voltage-source-type converter station connected multi-feed-in system
  • Method and device for determining stability of voltage-source-type converter station connected multi-feed-in system
  • Method and device for determining stability of voltage-source-type converter station connected multi-feed-in system

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Embodiment Construction

[0066] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0067] Such as figure 1 As shown, this embodiment provides a method for judging the stability of a voltage source converter station connected to a multi-infeed system, and the specific steps are as follows:

[0068] Input the hybrid generalized short-circuit ratio HGSCR model according to the power flow information in the power system;

[0069] Compare the output value of the HGSCR model with the value 1;

[0070] If the value is greater than 1, the power system is in a stable state;

[0071] If the value is equal to 1, the power system is in a critical stable state;

[0072] If the

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Abstract

The invention relates to a method and device for determining the stability of a voltage-source-type converter station connected multi-feed-in system. The method comprises the following steps of: inputting a hybrid generalized short circuit ratio (HGSCR) model according to the power flow information in a power system; comparing the output value of the HGSCR model with the value 1; if the output value is greater than 1, determining that the power system is in a stable state; if the output value is equal to 1, determining that the power system is in a critical stable state; and if the output value is less than 1, determining that the power system is unstable. Compared with the prior art, the method can accurately determine the static voltage stability of the hybrid dual-feed-in system.

Description

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Claims

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Application Information

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Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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