Robust control method and system for suppressing low-frequency oscillation, medium and computing equipment

A technology of robust control and low-frequency oscillation, applied in reducing/preventing power oscillation, reducing AC network flicker, AC network circuits, etc., can solve problems such as difficulty in ensuring robustness, and achieve the effect of ensuring robustness

Pending Publication Date: 2022-02-08
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, measures to suppress low-frequency oscillations include installing a power system stabilizer (PSS), but PSS has a good effect on low-frequency oscillation modes in the region, but the robustness is difficult to guarantee
At present, the third-generation flexible AC transmission FACTS suppresses low-frequency oscillations. Related technologies mainly focus on conventional flexible AC transmission equipment. There is no method for inter-line power flow controller (IPFC) to suppress low-frequency oscillations and ensure system robustness.

Method used

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  • Robust control method and system for suppressing low-frequency oscillation, medium and computing equipment
  • Robust control method and system for suppressing low-frequency oscillation, medium and computing equipment
  • Robust control method and system for suppressing low-frequency oscillation, medium and computing equipment

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0042] Such as figure 1 As shown, the robust control method for suppressing low-frequency oscillations includes the following steps:

[0043] Step 1, obtaining the frequency difference of the connected main control line in response to the low-frequency oscillation caused by the failure of the connected main control line;

[0044] Step 2, perform robust control on the frequency difference to obtain active power;

[0045] Step 3: Perform outer-loop constant power control according to the active power to obtain outer-loop active current to suppress low-frequency oscillation.

[0046] The above method is used in the converter of IPFC, mainly the converter connected to the main control line. This ...

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Abstract

The invention discloses a robust control method and system for suppressing low-frequency oscillation, a medium and computing equipment. According to the method and system, the frequency difference of a main control line causing low-frequency oscillation is obtained;robust control is carried out on the frequency difference, so that the robustness of the system can be guaranteed; active power obtained through the robust control is added into outer-loop constant power control so as to perform oscillation suppression; and therefore, the suppression of low-frequency oscillation caused by an IPFC converter to the main control line connected with the IPFC converter is realized.

Description

technical field [0001] The invention relates to a robust control method, system, medium and computing equipment for suppressing low-frequency oscillations, and belongs to the technical field of flexible alternating current transmission. Background technique [0002] Low-frequency oscillation is the power swing of the tie line after the power system is disturbed. Due to the large scale of the power grid, low-frequency oscillation problems occur from time to time in my country. The essential reason is the divergent oscillation caused by insufficient or even negative damping of the generator. Generally speaking, measures to suppress low-frequency oscillations include installing a power system stabilizer (PSS), but PSS has a good effect on low-frequency oscillation modes in the region, but its robustness is difficult to guarantee. At present, the third-generation flexible AC transmission FACTS suppresses low-frequency oscillations. Related technologies mainly focus on convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/002H02J3/24H02J2203/10
Inventor 赵静波贾宇乔李强贾勇勇解兵王大江李文博李铮
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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