CN212518545U - Electric power intelligence operation and maintenance measurement and control device - Google Patents

Abstract

The utility model discloses an electric power intelligence fortune dimension measurement and control device, include: the analog quantity input unit is used for acquiring phase voltage and phase current information and transmitting the phase voltage and phase current information to the bus; the digital quantity input unit is used for collecting the states of the operation buttons and the action switches and transmitting the states to the bus; the digital quantity output unit receives the control information of the bus and controls the action switch; the DSP unit is connected with the bus to process and send out the information of the MCU unit; the MCU unit is used for receiving the acquisition information transmitted by the bus and sending a control command to the bus; the power supply unit is used for providing a voltage signal required by the device; the display unit is used for displaying the acquired information and the processing control information; the device can be used for carrying out intelligent data acquisition on the transformer, has a perfect dynamic and static self-checking function, monitors the working conditions of all parts of the device on line and ensures the working reliability of the device; the high-precision element and the process ensure the accuracy and the reliability of the device and the long service life.

Description

Electric power intelligence operation and maintenance measurement and control device

Technical Field

The utility model relates to a transformer substation technical field especially relates to an electric power intelligence fortune dimension measurement and control device.

Background

In industrial modern production, electric power plays an important role as a clean energy source for industrial production. How to improve the use benefit and the production efficiency of energy sources plays an important role in a power system.

The current intelligent power system integrated automation system develops rapidly, 10kV solid cabinet, looped netowrk case, multiloop centralized monitoring application occasions such as distribution room, switching station, box-type substation, communication system cooperation constitutes the distribution automation system who has various looped netowrks and non-looped netowrk of channel mode, can't satisfy at distribution substation, the integrative detection function equipment such as the running state monitoring of main website realization distribution lines, fault identification, fault isolation and non-fault area recovery power supply.

SUMMERY OF THE UTILITY MODEL

Exist not enoughly to above-mentioned prior art, the utility model provides an electric power intelligence fortune dimension measurement and control device, visual demonstration local operation, convenient and reliable is connected to other systems and communicates.

The utility model adopts the technical proposal that:

an electric power intelligence operation and maintenance measurement and control device includes:

the analog quantity input unit is used for acquiring phase voltage and phase current information and transmitting the phase voltage and phase current information to the bus;

the digital quantity input unit is used for collecting the states of the operation buttons and the action switches and transmitting the states to the bus;

the digital quantity output unit receives the control information of the bus and controls the action switch;

the DSP unit is connected with the bus to process and send out the information of the MCU unit;

the MCU unit is used for receiving the acquisition information transmitted by the bus and sending a control command to the bus;

the power supply unit is used for providing a voltage signal required by the device;

the display unit is used for displaying the acquired information and the processing control information;

the output ends of the analog quantity input unit and the digital quantity input unit are connected with the bus, the input ends of the digital quantity output unit and the display unit are connected with the bus, and the MCU unit, the DSP unit and the power supply unit are connected with the bus.

As a further technical solution of the utility model is: the analog input unit comprises a voltage sensor, a current sensor, a filter, a sampling retainer, a multiplexer and an A/D converter; the output of voltage sensor and current sensor connects the wave filter, the output of wave filter connects the sample holder, the multiplexer is connected to the output of sample holder, the A/D converter is connected to the output of multiplexer, and the bus is connected to the output of A/D converter.

As a further technical solution of the utility model is: the digital quantity input unit comprises an isolation circuit and a data buffer, wherein the input end of the isolation circuit is connected with the control switch and the operation button, the output end of the isolation circuit is connected with the data buffer, and the output end of the data buffer is connected with the bus.

As a further technical solution of the utility model is: the digital quantity output unit comprises a control loop, an outlet loop, an isolation circuit and a data buffer, wherein the output end of the bus is connected with the data buffer, the output end of the data buffer is connected with the isolation circuit, the output end of the isolation circuit is connected with the outlet loop, and the output end of the outlet loop is connected with the control loop.

As a further technical solution of the utility model is: the display unit comprises a memory, an indicator lamp group and a liquid crystal display screen, wherein the memory is a PCA9539 type register; the input end of the memory is connected with the bus, the output end of the memory is connected with the liquid crystal display screen, and the indicator lamp set is connected with the bus.

As a further technical solution of the utility model is: the digital quantity input unit adopts a TCA8418 type I2C control keyboard scanning chip with integrated ESD protection.

As a further technical solution of the utility model is: the bus comprises a bus transceiver and a bus interface, wherein the bus transceiver is a SN74ABTE16245DL model bus transceiver; the bus interface is a MCP2551 type bus interface.

As a further technical solution of the utility model is: the MCU unit adopts an STM32F767IGT632 bit ARM + DSPM7 dual-core high-speed controller.

The utility model has the advantages that:

the utility model provides an electric power intelligence operation and maintenance measurement and control device is mainly applicable to 10kV transformer, can carry out the intelligent data acquisition of transformer, gather electric current, voltage, zero sequence, on-off state, deciliter position, thermal diagnosis, environment, humiture etc. switch temperature detects, long-range intelligent control and communication function, and is convenient and reliable; the device has a perfect dynamic and static self-checking function, and the working conditions of all parts of the device are monitored on line, so that the working reliability of the device is ensured; the high-precision element and the process ensure the accuracy and the reliability of the device and the long service life.

Drawings

Fig. 1 is a structural diagram of an electric power intelligent operation and maintenance measurement and control device provided by the utility model;

fig. 2 is a schematic connection diagram of an intelligent operation and maintenance measurement and control device for electric power provided by the utility model;

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings. It should be understood that the specific features in the embodiments and examples of the present application are detailed description of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, a structure diagram of an intelligent operation and maintenance measurement and control device for electric power according to the present invention is shown;

as shown in fig. 1, an electric power intelligent operation and maintenance measurement and control device includes:

the analog quantity input unit 101 is used for acquiring phase voltage and phase current information and transmitting the phase voltage and phase current information to a bus;

the digital quantity input unit 102 is used for collecting states of the operation buttons and the action switches and transmitting the states to the bus;

a digital quantity output unit 103 for receiving control information of the bus and controlling the action switch;

the DSP unit 104 is connected with the bus to process and send out the information of the MCU unit;

the MCU 105 receives the acquisition information transmitted by the bus and sends a control command to the bus;

a power supply unit 106 for providing a voltage signal required by the device;

a display unit 107 for displaying the acquired information and the processing control information;

the output ends of the analog input unit 101 and the digital input unit 102 are connected with a bus, the input ends of the digital output unit 103 and the display unit 107 are connected with the bus, and the MCU unit 105, the DSP unit 104, the power supply unit 106 and the bus are connected.

The embodiment of the utility model provides an in, intelligence fortune dimension measurement and control device mainly installs in 10kV solid cabinet, looped netowrk case, can carry out the intelligent data acquisition of looped netowrk case, gathers electric current, voltage, zero sequence, on off state, deciliter position, thermal diagnosis, environment, humiture etc. and generating line temperature detects, long-range intelligent control and communication function, also can convenient and reliable be connected to other systems and communicate.

The embodiment of the utility model provides an in, the MCU unit adopts STM32F767IGT632 position ARM + DSPM7 dual-core high speed controller, is furnished with 32M's SDRAM and 32M's FLASH, makes the operation faster more stable, adopts AD7606 of ADI company to carry out electric current, voltage, zero sequence current collection, has on-off state, deciliter position, thermal diagnosis, environment, humiture etc. and generating line temperature detects, remote intelligent control and communication function.

The utility model has 8 protection amount collection (2 line voltage, 1 zero sequence voltage, 3 protection current amount, one path of alternating current signal is reserved); 16 paths of switching signal quantity input (the power supply used by the input quantity input is AC220V, and the switching quantity collection comprises (local remote, switch closing position, energy storage position, isolation position, high temperature, over temperature, smoke, water level, door magnet, SF6 air pressure low, four paths of standby input and the like); supporting wireless temperature measurement, and being matched with a special sensor, the temperature nodes of 0-15 paths can be monitored simultaneously; the switch has obvious switch position display function and local state indicating signals such as terminal state, communication state and the like; 7-inch touch color screen, adopting a graphic and Chinese liquid crystal display interface and displaying a multilayer menu; advanced button-free touch screen input, man-machine friendly interface; the device has perfect dynamic and static self-checking function, the working conditions of all parts of the device are monitored on line, so that the working reliability of the device is ensured; the high-precision element and the process ensure the accuracy and the reliability of the device and the long service life.

Referring to fig. 2, a schematic connection diagram of an intelligent operation and maintenance measurement and control device for electric power provided by the present invention is shown;

in the embodiment of the present invention, the analog input unit includes a voltage sensor, a current sensor, a filter, a sample holder, a multiplexer, and an a/D converter; the output ends of the voltage sensor and the current sensor are connected with the filter, the output end of the filter is connected with the sampling holder, the output end of the sampling holder is connected with the multi-way switcher, the output end of the multi-way switcher is connected with the A/D converter, and the output end of the A/D converter is connected with the bus. The analog input unit adopts an acquisition circuit of an AD7617 model and supports 16-channel two-way synchronous sampling.

The embodiment of the utility model provides an in, digital quantity input unit includes buffer circuit and data, buffer circuit's input connection control switch and operating button, and buffer circuit is connected to buffer circuit's output, and bus is connected to data buffer circuit's output. The ADuM1201 adopted by the isolation circuit is a dual-channel digital isolator adopting 1/1 channel directivity.

The embodiment of the utility model provides an in, digital output unit includes control circuit, export return circuit, buffer circuit, data buffer, and wherein the data buffer is connected to the bus output, buffer circuit is connected to the output of data buffer, export return circuit is connected to buffer circuit's output, export return circuit's output connection control return circuit.

In the embodiment of the utility model, the display unit comprises a memory, an indicator light group and a liquid crystal display screen, wherein the memory is a register of PCA9539 model; the input end of the memory is connected with the bus, the output end of the memory is connected with the liquid crystal display screen, and the indicator lamp set is connected with the bus. The liquid crystal display screen displays the detection values of the phase voltage, the phase current and the zero sequence current and displays the active power value and the reactive power value; the indicating lamp group displays local distance, switches are closed, energy storage positions, isolation positions, high temperature, over temperature, smoke, water level, threshold, SF6 air pressure is low, and an alarm is given; the display device is provided with switching-on and switching-off time running time, bouncing time and various functional states;

modifying the communication address by setting Ethernet, RS232 and RS485 interfaces, calibrating clock time, modifying a communication password and checking each state in the device;

the embodiment of the utility model provides a can realize remote control operation and manual operation, wherein remote control operation carries out the remote control order of distant place under the distant place local condition, including switch-on and switch-off control; the remote control switch is not switched on, is remotely controlled by two points, is remotely controlled to keep time setting, and can adopt a mode of 'basic parameter-remote control timing'; the manual operation is to call out a debugging operation interface through the display screen and perform output operation on the relay.

The remote measurement can collect 7 protection quantity collections (3 line voltage quantities, 1 zero sequence voltage, 3 protection/measurement currents), power factors, frequencies, active power, reactive power and apparent power, and can collect 3 groups of environment temperature and humidity and 15 groups of cable temperatures.

The method comprises the steps of 16 paths of switching signal quantity input (input quantity can be set to be alternating current or direct current according to an external power supply, switching quantity collection comprises the steps of local remote, switching on and off, energy storage, isolation, smoke, door magnetism, low SF6 air pressure and 6 paths of non-electric quantity), 16 input quantities can be configured on an 'input configuration' interface, the current input quantity state can be read on a homepage or an 'input interface', the input quantity input is isolated by an optical coupler, external interference is avoided, remote signaling anti-shaking time is set on a 'basic parameter' interface, and an action threshold value is set, wherein when the voltage is lower than 30% of rated voltage, remote signaling is reliably not actuated, and when the voltage is higher than 70% of rated voltage, remote signaling is reliably actuated.

In the embodiment of the utility model provides an in, digital quantity input unit adopts the I2C control keyboard scanning chip that has integrated ESD protection of TCA8418 model. The Ethernet interface in the communication interface adopts a W5500 chip, and the embedded Ethernet controller of the integrated full hardware TCP/IP protocol stack can be used as an industrial Ethernet control chip; the wireless interface can adopt an ESP-07SWiFi module; the serial port interface adopts a serial port interface with a WK2124 model, and the WK2124 realizes the functions of SPI bridging/expanding 4 enhanced function serial ports (UART). The communication interface is also provided with an isolation circuit which adopts a network isolation transformer of HR911105A model.

In the embodiment of the present invention, the bus comprises a bus transceiver and a bus interface, the bus transceiver is a bus transceiver of SN74ABTE16245DL model; the bus interface is a MCP2551 type bus interface. The MCP2551 is a fault-tolerant high-speed CAN device and CAN be used as a CAN protocol controller and a physical bus interface.

The embodiment of the utility model provides a device still has output protect function, after output protection tripping operation/alarm signal, can generate corresponding action report and sequence incident record.

The intelligent control system comprises a function protection module, a phase current timing protection module, a phase current inverse time limit protection module, an overvoltage protection module, a zero sequence timing limit overcurrent protection module, an overload alarm, a reclosing switch, a low voltage alarm, a PT disconnection alarm, non-electric quantity protection, low cycle deloading and inrush current blocking current control;

the phase current timing protection module comprises a timing time-limit quick-break protection, a timing time-limit overcurrent 1 section and a timing time-limit overcurrent II section, when the current is larger than a set value, a tripping command is output after a set time delay, and a tripping signal lamp is turned on when the equipment trips. The three-section protection can be respectively selected to be switched in/out, and the current and delay time parameter values can be reasonably set according to the actual requirements of users.

And the phase current inverse time limit protection module is used for shortening the time of sending the action signal by the device along with the magnitude of the current when the current is larger than a set value. The user can reasonably select the inverse time limit multiple according to the actual situation, and further actively alarm and trip protection. Selecting an inverse time limit curve; there are "standard", "extraordinary", "extreme", "long inverse", "short inverse";

there are 5 inverse time-limited curves in total. Standard inverse time limit:

very inverse time-limited:

extreme inverse time limit:

short inverse time limit:

long inverse time limit:

and the overvoltage protection module and the device detect the Uab and the Ubc, and when one or more line voltages are larger than a voltage set value, a tripping command is output after a settable time delay, and equipment trips and simultaneously lights a tripping signal lamp. The protection can be respectively selected to be switched on/off, and the voltage and the delay time parameter value can be reasonably set according to the actual requirement of a user.

A zero sequence timing limit overcurrent protection module; and the detection of the grounding current is used for neutral point insulation or compensation. Because the zero sequence current in the indirect grounding system is generally small, the precision of detecting the zero sequence current by the device is relatively high, and particularly the capacitance current in a long cable system is large, the balance comparison is needed, and the transformation ratio of the zero sequence current transformer is reasonably selected.

The zero sequence timing limit overcurrent protection can be selected to exit/alarm/trip. When the alarm is selected, the device detects that the zero sequence current of the line is larger than a set value and delays, and then the device lights an alarm signal lamp and records a corresponding event record; when the tripping is selected, the device detects that the zero sequence current of the line is larger than a set value, and after time delay, the device outputs a tripping command, lights a tripping signal lamp and records a corresponding event record.

And (4) zero sequence voltage protection, namely detecting whether the vector sum of the three-phase voltages is zero, if not, judging that the single-phase earth fault occurs, and further sending a protection action command.

The device detects a cable temperature signal, when the temperature exceeds a protection fixed value, after settable delay, corresponding remote signaling can detect the on-position, the device outputs an alarm/trip command, the protection can be respectively selected to be put into (alarm, trip, double throw)/quit, and the temperature and time fixed values can also be respectively set.

And the PT wire breakage alarm is carried out, the accessed voltage is the line voltage, and whether the voltage loop is broken or not is automatically judged. The criteria are as follows:

i. there are no two-stage timing limit overcurrent protection action signals;

any phase current is larger than 0.3A, and any line voltage maximum value is smaller than 20V;

if both conditions are satisfied, the PT is judged to be broken. And after monitoring that the PT is disconnected, the device automatically sends out an alarm signal.

The embodiment of the utility model provides an in, still set up reclosing lock, the reclosing lock condition is as follows:

the reclosing soft pressing plate (constant value) is switched in, the reclosing frequency is not 0, and the range is 0-10;

the switch receives the fault tripping signal and sends a tripping command;

the switch is in the off position.

And meeting the conditions, and actuating the reclosing after the delay time set by the reclosing. If any of the above conditions is not met, a fault is always present, or the device receives a remote command, reclosing will immediately stop.

And after the reclosing condition is met, starting the reclosing function once the device disappears at the switching-on position of the switch, and outputting a closing command by the device after time delay.

And (3) carrying out low-cycle load shedding, detecting an alternating current frequency signal by the device, outputting a tripping command by the device after settable time delay when the frequency is lower than a protection fixed value, wherein the protection can be respectively selected to be put in or taken out, and the frequency and the time fixed value can also be respectively set.

After inrush current control is put into operation, the fixed value (inrush current time) plays a role, and the equipment locks overcurrent protection (quick-break overcurrent, overcurrent I section, overcurrent II section, overcurrent reverse time and overload) in the time, and other (overvoltage, low voltage, nonelectric quantity, zero sequence overcurrent) and the like can not be locked.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a system for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction system which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art can still modify or substitute the specific embodiments of the present invention with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present invention pending.

Claims (8)

1. The utility model provides an electric power intelligence operation and maintenance measurement and control device which characterized in that includes:

the analog quantity input unit is used for acquiring phase voltage and phase current information and transmitting the phase voltage and phase current information to the bus;

the digital quantity input unit is used for collecting the states of the operation buttons and the action switches and transmitting the states to the bus;

the digital quantity output unit receives the control information of the bus and controls the action switch;

the DSP unit is connected with the bus to process and send out the information of the MCU unit;

the MCU unit is used for receiving the acquisition information transmitted by the bus and sending a control command to the bus;

the power supply unit is used for providing a voltage signal required by the device;

the display unit is used for displaying the acquired information and the processing control information;

the output ends of the analog quantity input unit and the digital quantity input unit are connected with the bus, the input ends of the digital quantity output unit and the display unit are connected with the bus, and the MCU unit, the DSP unit and the power supply unit are connected with the bus.

2. The intelligent operation and maintenance measurement and control device of electric power according to claim 1, wherein the analog input unit comprises a voltage sensor, a current sensor, a filter, a sample holder, a multiplexer, an a/D converter; the output of voltage sensor and current sensor connects the wave filter, the output of wave filter connects the sample holder, the multiplexer is connected to the output of sample holder, the A/D converter is connected to the output of multiplexer, and the bus is connected to the output of A/D converter.

3. The intelligent electric power operation and maintenance measurement and control device according to claim 1, wherein the digital input unit comprises an isolation circuit and a data buffer, an input end of the isolation circuit is connected with the control switch and the operation button, an output end of the isolation circuit is connected with the data buffer, and an output end of the data buffer is connected with the bus.

4. The device according to claim 1, wherein the digital output unit comprises a control loop, an outlet loop, an isolation circuit, and a data buffer, wherein the output end of the bus is connected to the data buffer, the output end of the data buffer is connected to the isolation circuit, the output end of the isolation circuit is connected to the outlet loop, and the output end of the outlet loop is connected to the control loop.

5. The device according to claim 1, wherein the display unit comprises a memory, an indicator light set and a liquid crystal display screen, and the memory is a register of PCA9539 type; the input end of the memory is connected with the bus, the output end of the memory is connected with the liquid crystal display screen, and the indicator lamp set is connected with the bus.

6. The device according to claim 1, wherein the digital input unit is a TCA8418 type I2C control keyboard scan chip with integrated ESD protection.

7. The device according to claim 1, wherein the bus comprises a bus transceiver and a bus interface, the bus transceiver is a bus transceiver of model SN74ABTE16245 DL; the bus interface is a MCP2551 type bus interface.

8. The device according to claim 1, wherein the MCU unit employs an STM32F767IGT632 bit ARM + DSPM7 dual-core high-speed controller.

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