Active power distribution network interconnection system stability control method considering new energy access

A stable control method and technology of active distribution network, applied in the direction of system integration technology, information technology support system, electrical components, etc., to achieve the effect of improving stable operation level and suppressing low-frequency oscillation

Active Publication Date: 2019-12-13
GUANGDONG POWER GRID CO LTD +1
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  • Application Information

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Problems solved by technology

[0006] The present invention provides a stable control method for an active distribution network interconnection system that takes into account the access of new energy, which solves the problem of low-frequency oscillation caused by a large number of distributed new energy units connected to the distribution network for system interconnection, and effectively suppresses polymorphism Beneficial effects of low-frequency oscillation of the energy interconnection system and improvement of the stable operation level of the active distribution network system

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  • Active power distribution network interconnection system stability control method considering new energy access
  • Active power distribution network interconnection system stability control method considering new energy access
  • Active power distribution network interconnection system stability control method considering new energy access

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[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be thorough.

[0040] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] At present, ...

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Abstract

The invention provides an active power distribution network interconnection system stability control method considering new energy access, comprising the following steps: firstly, the efficiency degree of the function of a power system stability controller is calculated to obtain an optimal installation place of the controller; secondly, the controller is divided into two layers, the first layer is a local power system stability controller which is used for suppressing local oscillation, is designed on a strong correlation unit of the controller and only feeds back a local unit signal, and thesecond layer is a remote interconnection power system stability controller which is arranged on the strong correlation unit of the controller and aims at a system interconnection oscillation mode; and finally, a local power system stability controller and a remote interconnected power system stability controller are designed. The active power distribution network interconnection system stabilitycontrol method considering new energy access has the beneficial effect that the low-frequency oscillation of a polymorphic energy utilization interconnection system is suppressed and the stable operation level of an active power distribution network system is improved.

Description

technical field [0001] The present invention relates to the field of safety and stability control of multi-state energy utilization systems, in particular to a stability control method for an active distribution network interconnection system that takes into account the access of new energy sources. Background technique [0002] In the power system, when the generators run in parallel through the transmission line, the relative swing between the rotors of the generators will occur under the disturbance, and the continuous oscillation will be caused when the damping is insufficient. At this time, the power on the transmission line also oscillates correspondingly. Because the oscillation frequency is low, generally 0.1-2.5Hz, it is called low-frequency oscillation. In recent years, with the increasing connection between active distribution networks and the access of a large number of new energy sources such as distributed wind power and photovoltaic power generation, the probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38H02J13/00
CPCH02J3/24Y02E40/70Y04S10/12
Inventor 钱峰刘俊磊付聪唐旭辰杨韵钟雅珊
Owner GUANGDONG POWER GRID CO LTD
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