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A DC emergency power control method and a closed-loop power modulation module

A power control and DC power technology, which is applied in the field of electrical engineering and can solve the problems of not being able to suppress the forward swing of the power angle and the swing back of the power angle at the same time, and the reduction of the effect of suppressing the power angle swing.

Inactive Publication Date: 2021-04-20
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a DC emergency power control method and a closed-loop power modulation module, aiming to solve the problem that the traditional DC emergency power control method cannot simultaneously suppress the power angle forward swing and the power angle back swing, resulting in The problem of reduced suppression effect of power angle swing by DC emergency power control

Method used

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  • A DC emergency power control method and a closed-loop power modulation module
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  • A DC emergency power control method and a closed-loop power modulation module

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] like figure 1 As shown, the present invention provides a DC emergency power control method, including:

[0048] S1: Receive the variation of the input power signal transmitted by the DC emergency power controller in real time, and judge whether the variation of the input power signal reaches the start threshold, if it reaches the start threshold, go to step S2; otherwise, repeat step S1;

[0049] S2: After low-pass filtering the variation of the input power signal, calculate the curve according to the DC power correction amount to obtain the DC power correction amount;

[0050] S3: superim...

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Abstract

The invention discloses a DC emergency power control method and a closed-loop power modulation module, which belong to the field of electrical engineering and include: S1 judging whether the current input power signal variation reaches the start threshold, and if it reaches the start threshold, go to S2; otherwise, repeat S1 and S2 low-pass filter the input power signal variation, calculate the curve according to the DC power correction amount, and obtain the DC power correction amount; S3 superimpose the DC power correction amount and the output DC power command value to obtain the DC power control command value. The present invention adds a closed-loop power modulation module to the DC emergency power controller to increase the deceleration area of ​​the power angle in the forward swing process, suppress the forward swing of the power angle, reduce the acceleration area in the back swing process, and increase the deceleration area in the back swing process , to suppress the swing back of the power angle, and improve the suppression effect of the DC emergency power control on the swing of the power angle.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and more specifically relates to a DC emergency power control method and a closed-loop power modulation module. Background technique [0002] The successive commissioning of UHVDC power transmission projects has led to the increasingly complex operation of AC-DC hybrid power systems, and the influence of DC characteristics on the safety and stability of power grids has attracted people's attention. The DC transmission system has the characteristics of fast controllability and large regulation capacity. Utilizing the above characteristics to provide emergency power support to the AC system during the large disturbance transient process can improve and enhance the transient and dynamic stability of the AC-DC hybrid power grid. [0003] The traditional DC emergency power control strategy is the safety control measure of the second line of defense. The DC emergency power control is usually set b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/02
CPCH02J3/02
Inventor 舒展姚伟杨程祥谭阳琛艾小猛文劲宇陈波程思萌陶翔蔡霞周宁邹进汪硕承
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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