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Power oscillation suppression method and system, controller and storage medium

A technology of power oscillation and controller, which is applied in the direction of reducing/preventing power oscillation, reducing the flicker of AC network, electrical components, etc. It can solve the problems of effect change, inability to suppress wide-band oscillation phenomenon, and difficulty in equipment debugging, so as to suppress power Oscillating effect

Pending Publication Date: 2022-03-15
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology

However, the above method is limited by the physical characteristics of the synchronous generator, and cannot effectively suppress the broadband oscillation phenomenon, and the effect of the device is closely related to the local power grid structure and surrounding electrical equipment. It is difficult to debug the equipment, and the effect will also be Varies with actual working conditions

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  • Power oscillation suppression method and system, controller and storage medium
  • Power oscillation suppression method and system, controller and storage medium
  • Power oscillation suppression method and system, controller and storage medium

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Embodiment Construction

[0049] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0050] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element at the same time. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may...

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Abstract

The invention discloses a power oscillation suppression method and system, a controller and a storage medium. The method comprises the following steps: acquiring a voltage signal uabc of a power system, and converting the voltage signal uabc into a voltage signal udq of a two-phase coordinate system; the voltage signal udq is processed to obtain a signal of oscillation frequency, and the signal is subjected to phase correction and gain to be superposed to the signal to form a dq-axis current instruction; determining whether the oscillation amplitude of the signal is reduced or not; if the oscillation amplitude of the signal is reduced, adjusting the angle and gain of phase correction; and if the oscillation amplitude of the signal is not reduced, adjusting the angle and gain of phase correction in the opposite direction, and finally finding out a group of parameters capable of reducing the oscillation amplitude of the signal to the greatest extent. According to the embodiment of the invention, the power converter can be optimized through a control algorithm, the output impedance of the power converter can be intelligently adjusted, and the power oscillation of a power system can be effectively suppressed.

Description

technical field [0001] The present application relates to the technical fields of power electronics and new energy power generation, and in particular to a power oscillation suppression method, system, controller and storage medium. Background technique [0002] As the global energy crisis and environmental pollution become increasingly prominent, renewable energy power generation represented by photovoltaic power generation, wind power generation and hydropower generation is developing rapidly and will occupy an important position in the future energy composition. With the wide application of new energy power electronic equipment in power systems, stability problems such as low-frequency oscillation and subsynchronous oscillation in power systems are becoming more and more serious. [0003] At present, in traditional power systems, synchronous generators are equipped with power system stabilizers (PSSs) to provide power oscillation damping (POD) capabilities. However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/002H02J3/24H02J2203/10
Inventor 赵明权辛凯邵章平
Owner HUAWEI DIGITAL POWER TECH CO LTD
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