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Master-slave control system and method used for parallel operation of APF/SVG

A technology of control system and main controller, applied in flexible AC transmission system and AC network to reduce harmonics/ripples, reactive power adjustment/elimination/compensation, etc., can solve problems such as inapplicable APF/SVG devices, Achieve good compensation effect and improve utilization rate

Inactive Publication Date: 2013-07-31
SIEYUAN QINGNENG ELECTRICAL & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this prior art is designed for frequency converters and is not suitable for APF / SVG devices

Method used

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  • Master-slave control system and method used for parallel operation of APF/SVG
  • Master-slave control system and method used for parallel operation of APF/SVG
  • Master-slave control system and method used for parallel operation of APF/SVG

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Embodiment

[0030] Such as figure 1 As shown, in the prior art, devices 1 to N are separately connected to the busbar in parallel, and the secondary measurement line of the user CT is connected to each device in series. In this operating mode, there is no communication between the devices and only Realize open loop compensation.

[0031] Such as figure 2 As shown, this embodiment includes: a master controller, a slave controller, and several voltage transformers and current transformers arranged on the busbar, wherein: the output terminals of the current transformers and voltage transformers at the user end and the simulation of the master controller The output terminal of the total output current transformer is connected with the analog data interface of the main controller and transmits the output current information of the device, the optical fiber interface of the main controller and the slave controller The optical fiber interface is connected and transmits reactive power and harm...

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Abstract

The invention, which belongs to the power electronic control technology field, relates to a master-slave control system and a method used for a parallel operation of APF / SVG. The system comprises the following parts: a master controller, slave controllers and a plurality of voltage transformers and current transformers, wherein the voltage transformers and current transformers are arranged on a bus. Output terminals of the current transformers and the voltage transformers of a user terminal are connected with an analog quantity data interface of the master controller and are used for transmitting voltage and current information of the system; An output terminal of a total output current transformer is connected with the analog quantity data interface of the master controller and is used for transmitting output current information of the devices; a fiber interface of the master controller is connected with fiber interfaces of the slave controllers and is used for transmitting to-be compensated reactive and harmonic wave information; and the fiber interfaces of the salve controllers are connected with the fiber interface of the main controller and are used for transmitting information of operation states of the all slave controllers to realize closed-loop control. According to the invention, all parallel devices have good compensation effects and utilization rates of the devicesunder unified control of the master controller.

Description

technical field [0001] The present invention relates to a system and method in the technical field of power electronic control, in particular to a master-slave control system and method for APF (Active Power Filter) / SVG (Static Var Generator) parallel operation. Background technique [0002] Power electronic devices such as APF / SVG are limited by device level and manufacturing process, and the capacity of a single device cannot be made very large. When the current to be compensated by the system exceeds the rated compensation capacity of a single device, multiple devices are usually selected to operate in parallel. The way. Or users have already used power electronic devices such as APF / SVG, and when they want to expand the capacity, they will also choose the mode of parallel operation of multiple devices. [0003] The traditional way of connecting multiple devices in parallel, such as figure 1 As shown, devices 1 to N are respectively connected to the busbar, and the seco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/10Y02E40/20
Inventor 季建辉宋强侯坤侯焱
Owner SIEYUAN QINGNENG ELECTRICAL & ELECTRONICS
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