CN219268731U

CN219268731U - Modularized flexible interconnection device

Info

Publication number: CN219268731U
Application number: CN202223237053.4U
Authority: CN
Inventors: 邓诗诗; 陈伟铭; 吴涵; 王文祝; 庄永楷; 孙平清
Original assignee: Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd; Shishi Power Supply Co of State Grid Fujian Electric Power Co Ltd
Current assignee: Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd; Shishi Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date: 2022-12-03
Filing date: 2022-12-03
Publication date: 2023-06-27
Anticipated expiration: 2032-12-03

Abstract

The utility model proposes a modular flexible interconnection device comprising: the device comprises a flexible interconnection controller, a power module controller, a plurality of power modules, an isolation transformer and the like; the power module is the minimum power conversion unit of the flexible interconnection device converter, and a plurality of power modules are connected in parallel to form the flexible interconnection device converter; the power module controller generates a synchronous control signal to realize the regulation of the output power of the converter; the flexible interconnect controller is used for power or voltage reference and operating mode switching for a given converter. The modularized flexible interconnection device provided by the utility model can flexibly configure the number of the power modules of the flexible interconnection device according to the capacity of the platform area so as to reduce the manufacturing cost of the flexible interconnection device.

Description

Modularized flexible interconnection device

Technical Field

The utility model relates to the technical field of low-voltage intelligent power distribution, in particular to a modularized flexible interconnection device.

Background

In recent years, the demonstration reduction of flexible interconnection test points of test point areas is carried out in Zhejiang, jiangsu, fujian and other places, the problems of light and heavy load coexistence, unbalanced three phases, insufficient reactive compensation and the like of the areas are solved, and meanwhile, the power supply reliability of a low-voltage area is improved through fault transfer under the condition of power failure or distribution and transformation failure of an upper-level power grid. Because the flexible interconnection device of the transformer area generally adopts an alternating current-direct current-alternating current scheme, a high-power electronic converter needs to be applied, and in practical application, customized configuration is required according to the practical capacity of the transformer area, the cost is high, and the popularization and the application of the flexible interconnection device of the transformer area are affected.

Disclosure of Invention

Therefore, the present utility model is directed to a modular flexible interconnection device, which can flexibly configure the number of power modules of the flexible interconnection device according to the capacity of a platform area, so as to reduce the manufacturing cost of the flexible interconnection device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a modular flexible interconnect device comprising: the device comprises a flexible interconnection controller, a power module controller, a plurality of power modules and an isolation transformer; the power module is provided with a CAN communication interface, and the power module controller are communicated through a CAN bus; the flexible interconnection controller is communicated with the power module controller through a network cable and a control cable; the isolation transformer is connected with each power module; the power module is the minimum power conversion unit of the flexible interconnection device converter, and a plurality of power modules are connected in parallel to form the flexible interconnection device converter; the power module controller generates a synchronous control signal to realize module output power adjustment.

In a preferred embodiment, the power modules employ a neutral point clamped three level T-converter topology, and the number of power modules is configured according to the amount of power transferred from the bay.

In a preferred embodiment, the power module controller generates a synchronization control signal to control the module power output via the CAN bus.

In a preferred embodiment, the power module controller generates the synchronous control signal and the control mode switching command according to the control command of the flexible interconnection controller, and the control modes include a constant voltage constant frequency control mode, a constant power control mode and a constant direct current voltage control mode.

In a preferred embodiment, the flexible interconnection controller communicates with the power module controller through two modes of network cable and control cable, wherein the network cable adopts IEC 61850 or MODBUS communication protocol.

Compared with the prior art, the utility model has the following beneficial effects: the flexible interconnection converter with the modularized structure is characterized in that the power module quantity is flexibly configured according to the transfer power of the transformer area to form the modularized flexible interconnection device with variable power, the power modules can be produced in batches to reduce the manufacturing cost, the production cost of the flexible interconnection device is further reduced, and the flexible interconnection device has obvious executable performance and economy.

Drawings

Fig. 1 is a schematic diagram of a modular flex interconnect device in accordance with a preferred embodiment of the present utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application; as used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Fig. 1 is a schematic diagram of a modular flexible interconnect device of this embodiment, including 1 flexible interconnect controller and 2 modular converters, each modular converter consisting of 8 power modules. The power modules adopt neutral point clamped three-level T-shaped circuit topology, and the number of the power modules is flexibly configured according to the transfer power of the station area. The power module controller communicates with the power module through a CAN bus. The flexible interconnection controller communicates with the power module controller via a network cable and a control cable.

And the 2 power module controllers generate synchronous control signals and control mode switching instructions according to the control instructions of the flexible interconnection controllers. The power module controller generates a synchronous control signal and adjusts the output power of the power module through the CAN bus.

The power module controller generates synchronous control signals and control mode switching instructions according to control instructions of the flexible interconnection controller, wherein the control modes comprise, but are not limited to, a constant voltage constant frequency control (V/f) mode, a constant power control (P/Q) mode and a constant direct current voltage control mode. The flexible interconnection controller is communicated with the power module controller through two modes of network cables and control cables, and the network cables adopt IEC 61850 or MODBUS communication protocols.

While the utility model has been described with reference to the preferred embodiments, it should be noted that modifications and adaptations to those embodiments may occur to one skilled in the art without departing from the principles of the present patent and are intended to be within the scope of the present patent.

The present utility model is not limited to the above-mentioned preferred embodiments, and any person can obtain a modularized flexible interconnection device in other various forms under the teaching of the present utility model, and all equivalent changes and modifications made according to the claims of the present utility model shall be covered by the present utility model.

Claims

1. A modular flexible interconnect device, comprising: the device comprises a flexible interconnection controller, a power module controller, a plurality of power modules and an isolation transformer; the power module is provided with a CAN communication interface, and the power module controller are communicated through a CAN bus; the flexible interconnection controller is communicated with the power module controller through a network cable and a control cable; the isolation transformer is connected with each power module; the power module is the minimum power conversion unit of the flexible interconnection device converter, and a plurality of power modules are connected in parallel to form the flexible interconnection device converter; the power module controller generates a synchronous control signal to realize module output power adjustment.

2. The modular flexible interconnect device of claim 1, wherein the power modules are configured according to a transfer power level of the bay using a neutral point clamped three level T-converter topology.

3. A modular flexible interconnect according to claim 1, wherein the power module controller generates a synchronous control signal to control the module power output via the CAN bus.

4. A modular flexible interconnect device according to claim 3, wherein the power module controller generates the synchronization control signal and the control mode switching command according to the control command of the flexible interconnect controller, and the control modes include a constant voltage constant frequency control mode, a constant power control mode and a constant direct voltage control mode.

5. The modular flexible interconnect device of claim 4, wherein the flexible interconnect controller communicates with the power module controller via both a network cable and a control cable, the network cable employing IEC 61850 or MODBUS communication protocols.