CN105067859A - Power metering system equipped with monitoring component - Google Patents

Abstract

The invention provides a power metering system provided with a monitoring component, which includes a power meter and a power collection device. A main board is arranged inside the power collection device, and a power board, a control board and an expansion board are sequentially inserted on the main board. The control board is provided with an acquisition chip, a control chip, a storage chip, a communication chip and a monitoring component capable of communicating with each other, and the acquisition chip is connected to the output end of the electric energy meter through a data line. The invention can accurately collect the metered electricity of electric energy meters with different electricity prices in new energy power plants, and can collect the electric energy of all electric energy meters at the settlement point at a specified time, and furthermore, due to the monitoring components set by the electricity metering system of the present invention, it is possible to monitor the electric energy Real-time monitoring of the meter and the electricity collection device ensures the normal working status of the energy meter and the electricity collection device. The alarm module sends a fault alarm in time when a fault occurs, thereby ensuring the accuracy of the collected meter electricity.

Description

A power metering system provided with monitoring components

technical field

The invention relates to the field of electricity collection, in particular to an electricity metering system provided with a monitoring component.

Background technique

As a kind of energy, electricity occupies an extremely important and irreplaceable position in the production of national economy. The same new energy power plant has different power generation projects in each phase, and the cost of state subsidies is different, resulting in different electricity tariff standards for different power generation devices. The electricity of the electric energy meter of the power generation device can be used to accurately measure the electricity of the new energy power plant. Currently, the work of collecting electricity from new energy power plants is mainly collected manually by the employees of each new energy power plant, and the relevant data is reported to the measurement unit. Nor can it guarantee the accuracy of the CC data.

In order to solve this problem, a new energy power plant electric energy collection system has been developed in recent years, which can directly collect, store and transfer the metering and billing information collected and generated by the gateway meter of the new energy power plant and substation. Billing information, while the electricity at the gateway needs to be apportioned according to different settlement entities and different electricity prices of different energy meters, resulting in inaccurate collection of electricity fee information.

On the other hand, the existing data communication collection terminal equipment system itself runs slowly, and the frequency of power data collection is relatively high. Therefore, data blockage often occurs during the collection process, resulting in slow operation of the equipment system and blockage, resulting in delays in collection time points, inaccurate Problems with collecting or collecting inaccurate data.

Contents of the invention

The present invention provides a power metering system equipped with monitoring components to solve the above-mentioned shortcomings of inaccurate data collection, heavy collection workload, time delay and manual collection of data in the existing electricity collection meter mentioned above. , it can accurately collect the electricity of the electric energy meters of different electricity prices in each new energy power plant, and can collect the electric energy of all the electric energy meters at the settlement point at a specified time, and because of the monitoring component, it can monitor the electric energy meters and electric quantity collection devices , to ensure the normal operation of the electric energy meter and the electric quantity collection device and the accuracy of the collected settlement meter electric quantity, and to send a fault alarm to the staff in time when a fault occurs, to eliminate the fault in time, and to ensure the accuracy of the electric energy meter collected by the electric energy meter .

Specifically, the present invention provides a power metering system provided with a monitoring component, which includes a power meter and a power collection device, and the power collection device includes a main board, a power board, a control board and an expansion board located on the main board, The control board is provided with an acquisition chip, a control chip, a storage chip, a communication chip and a monitoring component capable of communicating with each other, and the output end of the acquisition chip, the input end of the communication chip and the input end of the storage chip are connected to the control unit. The communication terminal on the chip; the electric energy meter includes a single-chip microcomputer and an electric energy acquisition unit, a storage unit and a communication unit connected with the single-chip communication, the output end of the electric energy collection unit is connected to an input end of the single-chip microcomputer, and the single-chip microcomputer The output end of the storage unit is respectively connected to the input end of the storage unit and the input end of the communication unit, and the output end of the communication unit is connected to the input end of the acquisition chip through a data bus; the monitoring component includes a monitoring power acquisition unit, The comparison unit, the fault protection circuit and the alarm module, the output end of the monitoring power acquisition unit is connected to the input end of the comparison unit, the output end of the comparison unit is respectively connected to the input end of the alarm module and the fault protection circuit, and a minimum power threshold is set inside the comparison unit and the maximum power threshold.

Preferably, the input end of the monitoring power acquisition unit is connected to the output end of the collection chip, and is used to collect the meter power of a plurality of electric energy meters and send the collected meter power to the comparison unit, and the comparison unit will The collected meter power is compared with the minimum power threshold and the maximum power threshold respectively, when the meter power is zero and/or the meter power is lower than the minimum power threshold, or when the meter power is higher than the highest power threshold , the monitoring component sends an error signal to the control chip.

Preferably, the comparison unit includes a core board and a voice chip located on the core board, an audio interface, a USB interface, an RJ45 Ethernet interface, and a communication terminal interface, and the input terminal of the communication terminal interface is connected to the monitoring power acquisition unit to obtain the collected data. Data, the output end of the communication terminal interface is connected to the input end of the core board, and the core board converts the collected raw power data into charts and displays them on the display screen, and compares the collected meter power with the minimum power threshold and the highest power threshold. The power threshold is compared and the error signal is displayed on the display.

Preferably, the power collection unit includes a power measurement chip, a voltage regulation circuit and a current regulation circuit, and the voltage regulation circuit and the current regulation circuit are electrically connected to the power measurement chip.

Preferably, the electric energy measurement chip collects current signals through a photocoupler, and converts the collected current signals into electric quantity data signals.

Preferably, the alarm module includes a remote central alarm module and a local alarm module set on the electric quantity collection device.

Preferably, the control chip is provided with a clock module, and the clock module includes a remote clock and a GPS satellite clock module, and the GPS satellite clock module obtains accurate world time information through GPS satellite time service, and transmits the time information to A control chip, the remote clock obtains time information through remote communication.

Preferably, when the power collection system fails, the fault protection circuit automatically cuts off the power supply through the relay.

Preferably, the power collection device is connected to a remote controller through a remote transmission device, and the communication unit sends the metered electricity collected by a plurality of electric energy meters to the remote controller through the remote transmission device, and the remote controller is connected to a plurality of The metered electricity of the electric energy meter is read and output in the form of a table. The remote controller calculates according to the settlement time and the metered electric quantity of multiple electric energy meters at the settlement time point to obtain the electricity price of the new energy power plant.

Preferably, the local alarm module includes a buzzer and an indicator light, and the remote central alarm module includes an alarm message sending unit, and the alarm message sending unit can send an alarm message to a remote controller, and the remote controller according to the alarm The short message can remotely control the power collection device.

Technical scheme of the present invention has following technical effect:

The invention provides a power metering system equipped with a monitoring component, which can accurately collect the power of electric energy meters of different electricity prices in each new energy power plant, and can collect the electric power of all electric energy meters at a settlement point at a specified time. Moreover, due to the installation of monitoring components, it is possible to monitor the electric energy meter and the electric quantity collection device, ensure the normal operation of the electric energy meter and the electric quantity collection device and the accuracy of the collected settlement meter, and send a fault alarm to the staff in time when a fault occurs , Troubleshooting in time to ensure the accuracy of the metered electricity collected by the electric energy meter.

Description of drawings

Fig. 1 is a structural schematic block diagram of the present invention;

Fig. 2 is the structural schematic diagram of electric quantity collection device of the present invention;

Fig. 3 is the structural representation of mainboard of the present invention;

Fig. 4 is a structural schematic diagram of an embodiment of the present invention;

Fig. 5 is a structural schematic block diagram of an embodiment of the present invention;

Fig. 6 is the schematic circuit diagram of the control board of the present invention;

Fig. 7 is the circuit schematic diagram of the electricity collection chip of the electric energy meter of the present invention;

Fig. 8 is a structural schematic block diagram of the monitoring component of the present invention; and

Figure 9 is a schematic diagram of the alarm module and the fault protection circuit.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, structure and working principle of the present invention are further explained:

As shown in Figure 1, the electricity metering system provided with monitoring components of the present invention includes a plurality of electric energy meters 1 and at least one electric quantity acquisition device 2 connected with these electric energy meters 1, and the electric quantity acquisition device 2 can collect a plurality of electric energy meters 1 meter electricity.

As shown in FIG. 2 , the power collection device 2 includes a housing 10 , and a communication port 60 , a display screen 70 and an indicator light 80 are arranged on the outside of the housing 10 . Both sides of the casing 10 are provided with mounting plates for quickly installing the power collection device 2 , and screw holes are provided at the ends of the mounting plate.

As shown in FIG. 3 , a main board 5 is arranged inside the power collection device 2 , and a power board 51 , a control board 52 and an expansion board 53 are sequentially inserted on the main board 5 . The power board 51 is connected to an external power source through a power cord, and the expansion board 53 can be a power board or a control board.

As shown in FIG. 1 , the control board 52 is provided with an acquisition chip 521 , a control chip 522 , a storage chip 523 , a communication chip 524 and a monitoring component 525 which are communicatively connected to each other. The collection chip 521 is connected to the output terminal of the electric energy meter 1 through a data line, so as to collect the metered electricity of the electric energy meter 1 . The communication chip 524 is connected to the communication terminal on the control chip 522 , so as to realize the communication with the control chip 522 . The output end of the collection chip 521 is connected to the input end of the control chip 522 , so as to send the collected metered electricity of multiple electric energy meters 1 to the control chip 522 . The output end of the control chip 522 is respectively connected to the input end of the memory chip 523 and the output end of the communication chip 524 . The storage chip 523 stores the metered electric quantities of multiple electric energy meters.

A clock chip 526 is also arranged on the control board 52, and the clock chip 526 includes a remote clock and a GPS satellite clock. The clock chip 526 can calibrate the time of the power collection device 2 and the electric energy meter 1 according to the accurate time, so as to ensure the time accuracy of the metered electric quantity collected by the electric energy meter 1 for settlement. The GPS satellite clock chip obtains accurate world time information through GPS satellite time service, and transmits the time information to the control chip, and the remote clock obtains accurate time information through remote communication.

In this embodiment, as shown in FIG. 6, the acquisition chip 521 is an RS485 chip, and the RS485 chip is connected to the RS485 data interfaces of a plurality of electric energy meters 1 through the RS485 data bus, and is used for collecting the meter electric quantities of a plurality of different electric energy meters 1 , and differently send the metered electricity of different electric energy meters to the control chip 522 .

The control chip 522 is a single-chip microcomputer. An IO port of the single-chip microcomputer is connected with the receiving and sending ends of the RS485 chip through an optocoupler, and is used to control the data receiving and sending of the RS485 chip. Accuracy of metered electricity of watt-hour meter 1.

The differential data end of the RS485 chip is connected to the twisted-pair data wire of the RS485 data bus, and the shielded wire of the RS485 data bus is connected to the ground wire of the circuit.

The communication chip is an RS232 chip, and the RS232 chip is connected with a remote transmission device 9, and the remote transmission device 9 is wirelessly connected to a remote controller 100, and the remote controller 100 receives and reads the metered power of multiple electric energy meters 9 collected by the power collection system. Intake and output in order to calculate the metered electricity of the new energy power plant.

The control operation panel 102 is connected to an IO port of the single-chip microcomputer through a data line, and is used to perform corresponding operations through the operation buttons 13, such as inputting data and instructions.

The control chip 522 is connected to the buzzer 103 and the relay 104 through a data line. One IO port of the single-chip microcomputer is connected to the buzzer 103 through a triode to control the buzzer 103 to alarm, and the other IO port of the single-chip microcomputer is connected to the relay 104 through a triode to protect the entire circuit from power failure.

The control chip 522 adopts software and hardware "watchdog" technology when in use to prevent crash phenomenon.

When in use, the RS485 chip inside the housing 10 is connected to the RS485 interfaces of a plurality of electric energy meters 1 through the RS485 data bus, and the differential data end of the RS485 chip is connected to the twisted-pair data line of the RS485 data bus, and the RS485 data The shield wire of the bus is connected to the ground wire of the circuit. The RS485 chip collects the metered electricity of multiple electric energy meters 1 and transmits it to the control chip 522 through communication. After processing the metered electricity data, it is stored by the memory chip 53 and then displayed on the display screen 70 as required.

The acquisition chip 521 is connected to multiple electric energy meters 1 through data lines, and is used to collect the metered electricity of multiple electric energy meters 1, and communicate and transmit to the control chip 522, and after processing the metered electric quantity data, store them through the storage chip 523 , and then displayed on the display screen 70 as required, and the display screen 70 is a liquid crystal display screen.

As shown in Fig. 1 and Fig. 7, electric energy meter 1 comprises single-chip microcomputer 3 and the electric energy acquisition unit 4, memory unit 6 and communication unit 7 that are connected with single-chip microcomputer 3 communication, the output end of electric energy acquisition unit 4 is connected the input end of single-chip microcomputer 3, single-chip microcomputer The output terminals of 3 are respectively connected to the input terminals of the storage unit 6 and the communication unit 7 . The output end of the communication unit 7 is connected to the input end of the acquisition chip 521 .

The power acquisition unit 4 includes a power measurement chip, a voltage conditioning circuit and a current conditioning circuit, the voltage conditioning circuit and the current conditioning circuit are electrically connected to the power measurement chip, the voltage conditioning circuit obtains the voltage signal on the measurement wire, and the current regulation circuit obtains the measurement wire The current signal on the circuit, and the voltage signal is input as a current signal to the electric energy measurement chip. The electric energy measurement chip obtains the power according to the power calculation method, and then obtains the electric energy value consumed by the user through time integration.

As shown in Figure 8 , the monitoring component 525 monitors the metered electricity of the electric energy meter collected by the electric energy collection device. The output end of the unit 200 is connected to the input end of the comparison unit 201, and the output end of the comparison unit 201 is respectively connected to the input end of the alarm module 220 and the fault protection circuit 210. The comparison unit 201 is provided with a minimum power threshold and a maximum power threshold.

The input end of the monitoring power acquisition unit 200 is connected to the output end of the acquisition chip, thereby collecting the meter power of each electric energy meter 1, and sending the collected meter power to the comparison unit 201, and the comparison unit 201 compares the collected meter power The power is compared with the minimum power threshold and the maximum power threshold, and when the meter power is zero and/or the meter power is lower than the minimum power threshold, or the meter power is higher than the highest power threshold, the comparison unit 201 sends an alarm signal to the control chip .

The comparison unit 201 includes a core board 202 , a display screen 203 , a voice chip 204 , an audio interface 205 , a USB interface 206 , an RJ45 Ethernet interface 207 and a communication terminal interface 208 . The core board 202 communicates with the display screen 203 , the voice chip 204 , the audio interface 205 , the USB interface 206 , the RJ45 Ethernet interface 207 and the communication terminal interface 208 . The core board 202 includes a processor, RAM and FLASH.

The communication terminal interface 208 communicates with the monitoring power acquisition unit 200 to obtain the collected data. The output of the communication terminal interface 208 is connected to the input of the core board 202. After calculation, the core board 202 converts the collected raw power data into a chart and displays to the display screen 203, and compare the collected meter power with the minimum power threshold and the maximum power threshold, and display the abnormal situation on the display screen 203. The core board 202 can output operation information to the voice chip 204, and the voice chip 204 drives a speaker or earphone device connected to the audio interface, and sends out a corresponding voice alarm.

The user uses a USB keyboard and a USB mouse to connect to the USB interface and communicate with the core board to input data and perform various setting items. The core board communicates with other networked devices through the RJ45 Ethernet interface, and transmits user power information to corresponding devices.

When the power collection system fails, the fault protection circuit 210 automatically cuts off the power supply through the relay to protect the electric energy meter and the power collection device.

As shown in FIG. 4 and FIG. 5 , in a specific embodiment, the power collection device 2 sends the measured power of multiple electric energy meters to the remote controller 100 through a remote transmission device 9 . The remote controller 100 reads the metered electricity of multiple electric energy meters, and outputs it in the form of a table, so that the staff can visually check the metered electric quantities of multiple electric energy meters 1 . The remote controller 100 calculates according to the settlement time and the metered quantities of multiple electric energy meters at the settlement time point to obtain the electricity price of the new energy power plant.

Alarm module 220 comprises local alarm module and remote central alarm module, and local alarm module is buzzer 206 and indicator light 80, and remote central alarm module is an alarm message sending unit, and alarm message sending unit can send alarm message to remote controller 100, The remote controller 100 can remotely control the power collection device 2 according to the alarm message. If the system breaks down, the control chip will send an alarm signal to the alarm module 220, the buzzer 206 will sound an alarm, and the indicator light 80 will flash an alarm. The alarm short message sending unit can send an alarm short message to the remote controller 100 .

The working principle of the present invention is further explained below:

The acquisition chip 521 is connected to a plurality of electric energy meters 1 through a data line, and is used to collect the metered electric quantities of the plurality of electric energy meters 1, and communicate and transmit them to the control chip 522, and the monitoring component 525 monitors the collected electric energy meters 1 for monitoring, if the metered quantities of multiple electric energy meters 1 collected are in error, the monitoring component 525 sends an error signal to the control chip 522, and the control chip 522 instructs the collection chip 521 to re-collect the correct metered quantities of electric energy meters 1, and After the meter electricity data is processed, it is stored by the memory chip 523, and then displayed by the display screen 70 as required, and the display screen 70 is a liquid crystal display screen.

And through the remote transmission device 9 , the metered quantities of electric energy meters are sent to the remote controller 100 . The remote controller 100 reads the metered electricity of multiple electric energy meters, and outputs it in the form of a table, so that the staff can visually check the metered electric quantities of multiple electric energy meters 1 . The remote controller 100 calculates according to the settlement time and the metered quantities of multiple electric energy meters at the settlement time point to obtain the electricity price of the new energy power plant.

The control chip 522 polls the clock chip 10 periodically, and the time notified by the clock chip is consistent with the time when statistical data is required to ensure the accuracy of the time for collecting electricity.

If the acquisition error occurs multiple times, it is judged that the system is faulty, and the multiple times here are two or more than two times. As shown in FIG. 9 , the control chip 522 sends an alarm signal to the fault protection circuit 210 and the alarm module 220 , and the fault protection circuit 210 automatically cuts off the power supply through the relay to protect the electric energy meter and the electric quantity collection device. The control chip 522 will send an alarm signal to the alarm module 220, the buzzer will sound an alarm, and the indicator light will flash an alarm. The alarm short message sending unit can send an alarm short message to the remote controller 100 .

Advantages of the present invention are as follows:

The present invention provides a power metering system equipped with a monitoring component, which can accurately collect the power of electric energy meters 1 of different electricity prices in each new energy power plant, and can collect the electric power of all electric energy meters 1 at a settlement point at a specified time. A monitoring component 525 is provided, which can monitor the operating status of the electric energy meter 1 and the electric quantity collection device 2 to ensure the normal operation of the electric energy meter 1 and the electric quantity collection device 2 and the accuracy of the collected settlement meter's electric quantity. Send a fault alarm to the staff, troubleshoot in time, and ensure the accuracy of the metered electricity collected by the electric energy meter 1.

Finally, it should be noted that: the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention range.

Claims (10)

1. A power metering system provided with monitoring components, comprising an electric energy meter and a power acquisition device, characterized in that: The power acquisition device includes a main board and a power board, a control board and an expansion board located on the main board, and the control board is provided with an acquisition chip, a control chip, a storage chip, a communication chip and a monitoring component that can communicate with each other , the communication terminal on the control chip is respectively connected with the output terminal of the acquisition chip, the input terminal of the communication chip and the input terminal of the storage chip; the monitoring component includes a monitoring power acquisition unit, a comparison unit, a fault protection circuit and Alarm module, the output end of the monitoring power acquisition unit is connected to the input end of the comparison unit, the output end of the comparison unit is respectively connected to the input end of the alarm module and the fault protection circuit, and the internal comparison unit set a minimum battery threshold and a maximum battery threshold; and The electric energy meter includes a single-chip microcomputer and an electric energy acquisition unit, a storage unit and a communication unit connected to the single-chip microcomputer. The input end of the storage unit and the input end of the communication unit, the output end of the communication unit is connected to the input end of the acquisition chip through the data bus. 2. The power metering system provided with monitoring components according to claim 1, characterized in that: The input end of the monitoring electricity acquisition unit is connected to the output end of the acquisition chip, which is used to collect the meter electricity of a plurality of electric energy meters and send the collected meter electricity to the comparison unit, and the comparison unit will collect the meter electricity The metered power is compared with the minimum power threshold and the highest power threshold respectively, and when the meter power is zero and/or the meter power is lower than the minimum power threshold, or when the meter power is higher than the highest power threshold, the The monitoring component sends an error signal to the control chip. 3. The power metering system provided with monitoring components according to claim 2, characterized in that: the comparison unit includes a core board and a voice chip, an audio interface, a USB interface, and an RJ45 Ethernet interface located on the core board and the communication terminal interface, the input terminal of the communication terminal interface is connected to the monitoring power acquisition unit to obtain the collected data, the output terminal of the communication terminal interface is connected to the input terminal of the core board, and the core board converts the collected raw power data into charts and displays them on the On the above-mentioned display screen, compare the collected meter power with the minimum power threshold and the maximum power threshold, and display the error signal on the display screen. 4. The power metering system provided with monitoring components according to claim 1, characterized in that: the electric energy collection unit includes an electric energy measurement chip, a voltage conditioning circuit and a current conditioning circuit, and the voltage conditioning circuit and the current conditioning circuit are connected to the The electric energy measuring chip is electrically connected. 5 . The power metering system provided with monitoring components according to claim 4 , wherein the power measurement chip collects current signals through photocouplers, and converts the collected current signals into power data signals. 5 . 6. The electricity metering system provided with monitoring components according to claim 2, wherein the alarm module includes a remote central alarm module and a local alarm module arranged on the electricity collection device. 7. The power metering system provided with monitoring components according to claim 1, characterized in that: the control chip is provided with a clock module, the clock module includes a remote clock and a GPS satellite clock module, the GPS satellite clock The module obtains accurate world time information through GPS satellite time service, and transmits the time information to the control chip, and the remote clock obtains time information through remote communication. 8 . The power metering system provided with monitoring components according to claim 6 , characterized in that: when the power collection system fails, the fault protection circuit automatically cuts off the power supply through a relay. 9. The electricity metering system provided with monitoring components according to claim 6, characterized in that: the electricity collection device is connected to a remote controller through a remote transmission device, and the communication unit collects the electricity of a plurality of electric energy meters The metered electricity is sent to the remote controller through the remote transmission device. The remote controller reads the metered electricity of multiple electric energy meters and outputs it in the form of a table. Calculate the metered electricity of the meter to get the electricity price of the new energy power plant. 10. The power metering system provided with monitoring components according to claim 9, characterized in that: the local alarm module includes a buzzer and an indicator light, and the remote central alarm module includes an alarm short message sending unit, and the alarm short message is sent The unit can send an alarm message to the remote controller, and the remote controller can remotely control the power collection device according to the alarm message.