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Active damping LCL filter, active damping control device, method and system

A filter and damping technology, used in harmonic reduction devices, circuit devices, and AC networks to reduce harmonics/ripples, etc., can solve the problems of damping loss, harmonic current attenuation ability, high power loss, etc., and reduce power loss. , the effect of reducing cost and avoiding damping loss

Active Publication Date: 2017-07-07
SIEMENS ELECTRICAL DRIVES
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  • Description
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Problems solved by technology

[0004] However, the disadvantage of the passive damping strategy is that the damping loss caused by the series resistance and the attenuation ability of the damping resistance to the harmonic current lead to high power loss

Method used

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  • Active damping LCL filter, active damping control device, method and system
  • Active damping LCL filter, active damping control device, method and system
  • Active damping LCL filter, active damping control device, method and system

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Embodiment Construction

[0065] In order to make the technical solutions 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 illustrate the present invention, and are not intended to limit the protection scope of the present invention.

[0066] For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is ...

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Abstract

The present invention discloses an active damping LCL filter, an active damping control device, an active damping control method and a control system. The active damping LCL filter comprises a network-side reactor, a bridge-side reactor, a branch capacitor, a first current transformer which is connected with the network side reactor and is used for detecting the three-phase current of a network side, and a second current transformer which is connected with the branch capacitor and is used for detecting the three-phase current of a branch.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to an active damping LCL filter, an active damping control device, method and system. Background technique [0002] With the development of power electronic conversion technology, voltage source converters (such as three-phase pulse width modulation (PWM) converters based on fully controlled power switching devices) have sinusoidal input current and adjustable power factor. It has been widely used in DC transmission, grid-connected power generation, superconducting energy storage and electric vehicles and other fields and industries. In recent years, experts and scholars at home and abroad have conducted a lot of research on converter control strategies. Although the control goals are low THD to achieve current sinusoidal and efficient operation at unit power factor with fast dynamic response, the processes of each algorithm are quite different. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/01H02J3/1864Y02E40/30Y02E40/40
Inventor 孙强高成海
Owner SIEMENS ELECTRICAL DRIVES
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