CN210167853U

CN210167853U - Distribution automation terminal

Info

Publication number: CN210167853U
Application number: CN201920745699.2U
Authority: CN
Inventors: 程鹏; 赵德鹏
Original assignee: Nanjing Zhaofu Power Technology Co Ltd
Current assignee: Nanjing Zhaofu Power Technology Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-03-20
Anticipated expiration: 2029-05-23

Abstract

The utility model provides a distribution automation terminal, includes main control module, with main control module electric connection's bus board, with bus board electric connection's power module, connect the plug-in components on the bus board through the hot plug, MOS pipe, current detection circuit and control circuit have between bus board and the plug-in components, current detection circuit's one end and bus board are connected, and the other end and MOS union coupling, the other end and the plug-in components of MOS pipe are connected, control circuit's one end and current detection circuit are connected, the other end and MOS union coupling. The utility model discloses distribution automation terminal has with low costs and the high hot plug technique of stability, through the main power source with the isolation of total line board, the rocking that makes the hot plug bring in the twinkling of an eye can not influence the main power source.

Description

Distribution automation terminal

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electrical equipment technical field specifically is a distribution automation terminal.

[ background of the invention ]

The distribution automation terminal is an intelligent station terminal developed for a power distribution network, can be widely applied to places such as a ring main unit, a switching station and a switching station in the power distribution network, is mainly used for local monitoring, control and fault detection of switching equipment, and can be used as a communication relay and a regional control center. The distribution automation terminal is a distribution network monitoring device and has high availability, the distribution automation terminal needs a close-to-zero outage rate in the whole operation period, therefore, when each plug-in unit has hardware failure or needs maintenance and upgrade, power-off plugging is impossible, a non-hot-plugging plug-in unit can cause permanent damage when being forcibly hot-plugged, and electrical interference can be generated between a main power supply and a conversion power supply in the hot-plugging process, so that the operation of a system can be influenced when the plug-in unit is hot-plugged, when the plug-in unit is plugged into the system, because capacitors exist in the plug-in unit, the system can charge the capacitors at the moment of plugging into the system, a large current can be generated at the moment, and the large current and the supply voltage of the system can be abnormal.

Therefore, it is a problem to be solved in the art to provide a distribution automation terminal capable of satisfying hot plug of a plug-in unit.

[ Utility model ] content

To the above problem, the utility model discloses distribution automation terminal has with low costs and the high hot plug technique of stability, through the isolation of main power source with the bus board, makes rocking that the hot plug brought in the twinkling of an eye can not influence the main power source.

For solving the problem, the utility model discloses distribution automation terminal includes the main control module, with main control module electric connection's bus board, with bus board electric connection's power module, through the plug-in components of hot plug connection on the bus board, MOS pipe, current detection circuit and control circuit have between bus board and the plug-in components, current detection circuit's one end and bus board are connected, and the other end and MOS union coupling, the other end and the plug-in components of MOS pipe are connected, control circuit's one end and current detection circuit are connected, the other end and MOS union coupling.

Furthermore, the power module comprises a main power supply, an optical coupling isolation chip connected with the main power supply and a level conversion chip connected with the optical coupling isolation chip, wherein the main power supply is electrically isolated from the bus board through the optical coupling isolation chip, and the voltage of the main power supply is converted into a voltage suitable for the work of the plug-in unit.

Further, the plug-in unit comprises a remote control module, and the remote control module provides 8-line remote control switching-on and switching-off and relay normally-open contact output.

Furthermore, the plug-in module comprises a remote signaling module, the remote signaling module processes the incoming signal in an optical coupling isolation mode, one remote signaling module realizes 30-path incoming at most, and the detection of the adaptive DC24V and DC48V remote signaling levels or the adaptive DC110V and DC220V remote signaling levels can be realized.

Further, the plug-in includes a telemetry module for collecting the alternating voltage and current and simultaneously transmitting to the master module.

Further, the insert comprises a comprehensive module which is mainly used for LED status display.

Furthermore, the utility model discloses distribution automation terminal has with low costs and the high hot plug technique of stability, through the isolation of main power source with the bus board, makes rocking that the hot plug brought in the twinkling of an eye can not influence the main power source.

[ description of the drawings ]

Fig. 1 is the utility model discloses distribution automation terminal's component structure schematic diagram.

Fig. 2 is the utility model discloses power module's component structure schematic diagram in distribution automation terminal.

Fig. 3 is the utility model discloses hot plug's in distribution automation terminal work flow chart.

[ detailed description ] embodiments

The directional terms of the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are only used for explaining and explaining the present invention, but not for limiting the scope of the present invention.

Referring to fig. 1 to 3, the utility model discloses distribution automation terminal's component structure is given, it includes main control module 1, with main control module electric connection's bus board 2, with bus board electric connection's power module 3, through the plug-in components 4 of hot plug connection on the bus board, main control module 1's hardware platform is based on 32 bit CPU, and software platform is based on embedded real-time operating system to adopt nonvolatile large capacity FLASH memory to ensure that data does not lose, power module 3 includes main power supply 301, keeps apart chip 302 with the opto-coupler of being connected, keeps apart the level conversion chip 303 that the chip is connected with the opto-coupler, and main power supply and bus board 2 carry out electrical isolation through the opto-coupler, convert main power supply voltage into the voltage that is suitable for plug-in components 4 work again. The plug-in unit 4 comprises a remote control module 401, a remote signaling module 402, a telemetry module 403 and a comprehensive module 404, wherein the remote control module 401 provides 8-line remote control switching-on and switching-off and relay normally-open contact output, the remote signaling module 402 processes switching-in signals in an optical coupling isolation mode, one remote signaling module realizes 30-line switching-in at most, the detection of self-adaptive DC24V and DC48V remote signaling levels or self-adaptive DC110V and DC220V remote signaling levels is realized, the telemetry module 403 is used for collecting alternating voltage and current quantity and simultaneously transmitting the alternating voltage and the current quantity to a main control module, and the comprehensive module 404 mainly has the function of LED state display.

Referring to fig. 3, a flow chart of hot plug is shown, when the plug-in unit 4 is inserted into the bus board 2, since capacitors exist inside the plug-in units, at the moment of insertion, the bus board charges the capacitors, a large current is generated at the moment, and the large current at the moment may cause the power supply voltage of the system to be abnormal, a MOS tube 405, a current detection circuit 406 and a control circuit 407 are added between the bus board 2 and the plug-in unit 4, one end of the current detection circuit is connected with the bus board 2, the other end of the current detection circuit is connected with the MOS tube 405, the other end of the MOS tube is connected with the plug-in unit 4, one end of the control circuit 407 is connected with the current detection circuit 406, and the other end of the control circuit is connected with the MOS tube. When the plug-in 4 is plugged into the bus board 2, the main board charges the capacitor in the plug-in, and when the output current exceeds the operating current of the MOS tube and rises to the set maximum value, the MOS tube limits the maximum output current to the level without increasing the output current, so that the output current is limited to the set maximum value. On the other hand, a capacitor can exist in the current detection circuit, the capacitor is connected in parallel to the control end of the MOS tube, when the voltage in the capacitor rises to the upper limit value of the voltage of the MOS tube, the MOS tube is disconnected, the whole loop is cut off at the moment, then the current is changed to zero, the voltage of the capacitor slowly drops, when the voltage drops to the lower limit value of the voltage of the MOS tube, the MOS is conducted again at the moment, the current is slowly increased to the set maximum value from zero at the moment, the circuit is repeatedly operated all the time, and the current in the whole loop is controlled in a relatively low and reasonable range. The utility model discloses distribution automation terminal has with low costs and the high hot plug technique of stability, through the main power source with the isolation of total line board, the rocking that makes the hot plug bring in the twinkling of an eye can not influence the main power source.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a distribution automation terminal, its characterized in that, distribution automation terminal includes main control module (1), with main control module electric connection's bus board (2), with bus board electric connection's power module (3), plug-in components (4) of connecting on the bus board through the hot plug, MOS pipe (405), current detection circuit (406) and control circuit (407) have between bus board (2) and plug-in components (4), the one end and the bus board (2) of current detection circuit (406) are connected, and the other end is connected with MOS pipe (405), and the other end and plug-in components (4) of MOS pipe are connected, the one end and the current detection circuit (406) of control circuit (407) are connected, and the other end and MOS union coupling.

2. The distribution automation terminal of claim 1, characterized in that the power module comprises a main power supply (301), an optical coupling isolation chip (302) connected to the main power supply, and a level conversion chip (303) connected to the optical coupling isolation chip, wherein the main power supply is electrically isolated from the bus board by the optical coupling isolation chip, and then the main power supply voltage is converted into a voltage suitable for the operation of the plug-in (4).

3. The distribution automation terminal according to claim 1, characterized in that the plug-in (4) comprises a remote control module (401), the remote control module (401) providing an 8-line remote control switching on and off and relay normally open contact output.

4. The distribution automation terminal of claim 1, wherein the card (4) includes a remote signaling module (402), the remote signaling module (402) processes incoming signals in an optically-isolated manner, one remote signaling module performs 30-way incoming at most, and is capable of detecting adaptive DC24V, DC48V remote signaling levels or adaptive DC110V, DC220V remote signaling levels.

5. The distribution automation terminal according to claim 1, characterised in that the card (4) comprises a telemetry module (403), the telemetry module (403) being adapted to collect the alternating voltage and the amount of current and to transmit them simultaneously to the master module.

6. The distribution automation terminal according to claim 1, characterised in that the card (4) comprises a comprehensive module (404), the comprehensive module (404) being mainly used for LED status display.