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Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method

A technology of control system and implementation method, which is applied in the direction of active power filtering, information technology support system, electrical components, etc., can solve the problems that are not easy to expand and maintain, and affect the operation of the system, and achieve easy expansion, strong scalability and stability good sex effect

Active Publication Date: 2013-10-23
SOUTHEAST UNIV
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Problems solved by technology

When one fails, it will affect the operation of the whole system; when the load harmonic changes greatly, it is not easy to expand and maintain

Method used

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  • Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method
  • Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method
  • Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] Such as figure 1 As shown, it is a modular multi-machine parallel high-power APF control system, including an upper layer controller and a multi-machine full compensation unit. The multi-machine full compensation unit is composed of several parallel power modules. The power unit includes a lower layer The controller and the three-phase three-wire PWM AC converter; use the upper and lower layer data coordination method to realize the data exchange between the upper layer controller and the lower layer controller. The upper and lower layer data coordination method includes receiving and loading harmonic data. This method can reduce digital system delay;

[0052] The upper-layer controller forms a compensation command current according to the grid-side voltage signal and the load-side current signal, and sends it to the lower-layer controller of each power module ...

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Abstract

The invention discloses a modularized multi-machine parallel-connection large-power APF (active power filter) control system and a realization method. By coordinating an upper layer controller and a lower layer controller, an effect for reasonably allocating the compensative capacity and improving the compensation precision can be realized; the upper layer controller is used for carrying out the coordination and switching control on each power module, for example, the upper layer controller is used for operating and monitoring the quantity of the power modules to be put into use according to a load requirement, numbering the power modules according to a rule and eliminating the switching subharmonic by utilizing the carrier phase shifting; the lower layer controller is used for receiving a compensation order of the upper layer controller and a synchronous signal of a previous sequence number controller and feeding back state information of the power module to the upper layer controller. By adopting the modularized multi-machine parallel-connection large-power APF control system, the compensation capacity of the power module and the computation of an upper layer and a lower layer of the control system are reasonably allocated, the entire system can be enabled to run stably and orderly, the stopping of the entire system caused by the malfunction of one power module can be avoided, and the feasibility and practical value are good.

Description

technical field [0001] The invention relates to a modular multi-machine parallel high-power APF control system and a realization method, belonging to the power electronics application technology. Background technique [0002] Since the 1920s and 1930s, the mercury arc rectifier used by the Germans produced obvious voltage and current distortion in the power grid, and the harmonic problem has been paid attention to by people. Harmonics come from electrical equipment with nonlinear characteristics, and a small part is generated by transformers and reactors in the power grid. There are mainly five types: ① power electronic devices, ② electrified railways, ③ industrial arc devices, ④ distribution network transformers, reactors, and ⑤ electricity for residential buildings. [0003] Due to the shortcomings of traditional passive filters, coupled with the development of power electronics technology, control theory and digital signal processing technology, the theory of active powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J13/00
CPCY04S40/124Y02E60/7838Y02E40/40Y02E40/20Y02E60/00
Inventor 赵剑锋曹武刘康礼江楠
Owner SOUTHEAST UNIV
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