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A kind of pcs system and device

A controller and off-grid technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve problems such as poor anti-electromagnetic interference ability, lack of systematic research and experimental verification, and only consider operational stability. Achieve the effect of strong anti-interference ability

Active Publication Date: 2018-01-09
XJ ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a lack of systematic research and experimental verification for seamless switching between microgrids with multiple microsources and large power grids
Moreover, the on-off grid switching command of the PCS device is transmitted through the communication protocol, especially when multiple PCSs are running at the same time, the ability to resist electromagnetic interference is poor
On-off grid switching only considers its operational stability, and restarts when off-grid switching occurs

Method used

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  • A kind of pcs system and device
  • A kind of pcs system and device
  • A kind of pcs system and device

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Embodiment Construction

[0061] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0062] PCS system embodiment

[0063] A kind of PCS system, comprises at least one set of PCS device, every set of PCS device (such as Figure 5 Shown) includes the main circuit part and the control machine part, the main circuit is as Figure 6 As shown, it includes an AC / DC module for connecting to the grid, the AC / DC module is connected to the DC / DC module, and the DC / DC module is used to connect to the corresponding battery pack. The control machine of each PCS device is connected to the hard node input signal issued by the microgrid through the hard node (such as Figure 9 , Figure 12 shown).

[0064] Such as Figure 9 , Figure 12 As shown, the hard node circuit includes an isolation circuit, the input terminal of the isolation capacitor is connected to a 220V input signal, and the output terminal is used to connect to the controller of the control...

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Abstract

The invention relates to a PCS system and apparatus. The PCS system comprises at least one PCS apparatus, each PCS apparatus comprises a main circuit portion and a controller portion. A main circuit comprises an AC / DC module for connection with a power network, the AC / DC module is connected with a DC / DC module, and the DC / DC module is used for connection with a corresponding battery pack; and the controller of each PCS apparatus is connected with hard node access signals issued by a microgrid through hard nodes. The grid-connected and off-grid switching control strategy of the PCS apparatus is realized through acquiring the DC 220V hard node access signals issued by the microgrid, and the anti-interference capability is high.

Description

technical field [0001] The present invention relates to a PCS system and device. Background technique [0002] The energy storage device refers to a device that is matched with the energy storage battery pack, connected between the battery pack and the grid, and stores the electric energy of the grid in the battery pack or feeds back the energy of the battery pack to the grid. its control system. [0003] When the microgrid is connected to the grid, the PCS device running in P / Q mode plays an important role in suppressing the fluctuation of the intermittent distributed power supply and ensuring the stable and reliable operation of the important load of the microgrid. Continue to supply power to important loads in V / F mode. In the process of switching between the microgrid and the large power grid, in order to ensure the safe and stable operation of some sensitive loads in the microgrid, the PCS device needs a control strategy for seamless switching between grid and grid. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32
CPCH02J3/32H02J3/38H02J3/388
Inventor 吕海超曹智慧万里强陈常曦赵玲
Owner XJ ELECTRIC