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A reactive power compensation device suitable for new energy grid-connected power generation system

A technology of grid-connected power generation and compensation device, which is applied in the field of power transmission and distribution, can solve the problems that the adverse effects of new energy power generation systems cannot be eliminated, the compensation capacity cannot be adjusted smoothly, and the reactive power compensation device is not ideal enough to improve reactive power compensation. effect, avoid adverse effects, improve the effect of power quality

Active Publication Date: 2015-10-21
STATE GRID CORP OF CHINA +3
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Problems solved by technology

And it can also form different filtering branches by configuring the parameters of capacitors and reactors. Its filtering ability can be designed according to the characteristics of on-site harmonics and reactive power, but its compensation capacity cannot be adjusted smoothly. level regulation
In short, the existing reactive power compensation devices are not ideal enough to eliminate the adverse effects on the grid caused by the grid connection of new energy power generation systems

Method used

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  • A reactive power compensation device suitable for new energy grid-connected power generation system
  • A reactive power compensation device suitable for new energy grid-connected power generation system
  • A reactive power compensation device suitable for new energy grid-connected power generation system

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Embodiment Construction

[0023] The purpose of the present invention is to solve the problem that the new energy power generation system has an impact on the power grid due to large harmonics and low power factor. The device can overcome the shortcomings of SVG static var generator and TSC static var compensator operating alone. The coordinated control of SVG+TSC is realized, so that the photovoltaic power generation system can be smoothly connected to the grid without any adverse impact on the grid.

[0024] The technical scheme of the invention is to connect the SVG static var generator and the TSC static var compensator in parallel to the power grid system, and perform coordinated control through a parallel coordination controller.

[0025] The parallel coordination controller controls the SVG static var generator and the TSC static var compensator to operate in the following three modes according to the reactive power and harmonic capacity of the system:

[0026] ①SVG static var generator works in...

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Abstract

A reactive compensation device suitable for a new energy grid-connected power generation system aims at solving the problem that because a new energy power generation system has high harmonic waves and a low power factor, a power grid is impacted. The reactive compensation device comprises an SVG, a TSC static var compensator and a parallel-connection coordination controller, wherein the SVG and the TSC static var compensator are connected in a power grid system in parallel, and a controller of the SVG and a controller of the TSC static var compensator are connected with the parallel-connection coordination controller through communication interfaces. According to the reactive compensation device suitable for the new energy grid-connected power generation system, the SVG and the TSC static var compensator are organically combined together, the SVG and TSC static var compensator have complementary advantages, adverse effects caused by the new energy power generation system on the power grid can be effectively avoided when the new energy power generation system is connected with the power grid, the reactive compensation effect is improved, and the electric energy quality of the power grid is improved.

Description

technical field [0001] The invention relates to a reactive power compensation device based on an SVG static var generator and a TSC static var compensation, which can smoothly connect a new energy power generation system to a grid, and belongs to the technical field of power transmission and distribution. Background technique [0002] New energy power generation systems (such as photovoltaic power generation systems, wind power generation systems, etc.) generally have the problems of low power factor and large harmonics. Therefore, when connecting to the grid system, it is necessary to use equipment with reactive power compensation and filtering capabilities that can realize stepless adjustment. deal with its power quality. [0003] At present, there are many devices used to deal with power quality, and their characteristics are different. SVG static var generator is a kind of reactive power compensation equipment, which can quickly and smoothly compensate the capacitive an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 刘胜军郭亚成乔红军陈占群卢卫城王聪利梁海涛相振沛安丽丽梁春峰
Owner STATE GRID CORP OF CHINA
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