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Damping control method and system for improving transient stability of new energy equipment

A technology of damping control and transient stability, applied in circuit devices, emergency treatment AC circuit layout, AC network circuits, etc., can solve the problem of large changes, great influence of the original characteristics of the device, and stability problems, reducing the design performance index of the phase-locked loop and other problems, to achieve the effect of small changes, improved transient synchronous operation capability of the system, and weak influence

Active Publication Date: 2022-03-04
HUAZHONG UNIV OF SCI & TECH +1
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AI Technical Summary

Problems solved by technology

However, these existing control strategies have greatly changed the existing phase-locked control structure, and have a greater impact on the original characteristics of the device, which is likely to cause new stability problems and reduce the design performance index of the phase-locked loop itself.

Method used

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  • Damping control method and system for improving transient stability of new energy equipment
  • Damping control method and system for improving transient stability of new energy equipment
  • Damping control method and system for improving transient stability of new energy equipment

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Embodiment Construction

[0026] 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. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the application scenarios of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0027] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] In order to improve the synchronous tracking operation ability of new energy equipment in the case of serious faults and facil...

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Abstract

The invention discloses a damping control method and system for improving transient stability of new energy equipment, and belongs to the field of transient stability control of a new energy power system, and the method comprises the steps: a first part is a fault detection link which mainly provides an additional link switching signal; whether an additional control link is input on the basis of original phase-locked loop control is judged by detecting whether the amplitude of the terminal voltage is lower than a set value; the second part is a damping mode selection link, and different damping control modes and self-adaptive damping compensation coefficients are selected according to external input signals; and the third part is an additional damping control link, wherein a generated additional damping signal is compensated for frequency output or voltage output of the phase-locked loop according to an external control signal. According to the method, the synchronous tracking operation capability of the new energy equipment under the condition of serious faults can be improved, the existing equipment is easy to transform, and the implementation cost is low.

Description

technical field [0001] The invention belongs to the field of transient stability control of new energy power systems, and more specifically relates to a damping control method and system for improving the transient stability of new energy equipment. Background technique [0002] The new power system with new energy as the main body will build a power system with renewable energy such as wind power and photovoltaics as the main primary energy. In recent years, my country's wind power has continued to grow rapidly, accounting for an increasing proportion of the power grid, and has become my country's three main energy sources. On the transmission side, due to the reverse distribution of primary energy and load in my country, in order to adapt to my country's energy distribution structure and meet the urgent needs of clean energy transmission, load center power supply, energy saving and emission reduction, the State Grid Corporation vigorously develops long-distance, large-scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/40H02J3/44
CPCH02J3/001H02J3/40H02J3/44H02J2300/24H02J2300/28Y02E10/56
Inventor 马锐江克证占萌曹侃黎金鑫
Owner HUAZHONG UNIV OF SCI & TECH
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