Electric energy management system with multifunctional communication protection function

Abstract

The utility model provides an electric energy management system with a multifunctional communication protection function. The electric energy management system comprises a microprocessor, and a power supply module, a carrier wave module, a storage module, an RS485 module, an AD converter, an electric energy metering module, an opening and closing mechanism, a switching value input module and a switching value output module which are electrically connected with the microprocessor, the electric energy metering module is electrically connected with the signal conditioning module, the AD converter is electrically connected with the output end of the multi-channel analog switch, the input end of the multi-channel analog switch is electrically connected with the signal conditioning module, and the signal conditioning module is electrically connected with the measurement voltage transformer, the measurement current transformer and the protection current transformer; the carrier wave module is in communication connection with the concentrator, the concentrator is in communication connection with the main station, and the RS485 modules are respectively in communication connection with the electric energy meters. According to the utility model, communication, metering, protection and control are integrated, and the traditional circuit breaker is promoted to develop towards the directions of high performance, high reliability, intelligence and interconnection.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage switch power distribution technical field, concretely is a kind of electric energy management system with multifunctional communication protection function. BACKGROUND

[0002] The conventional circuit breaker currently adopted is low in intelligent level, limited in sensing capability and poor in communication capability. The conventional electronic circuit breaker only has voltage and current measurement protection, and is low in measurement accuracy; it has no remote interaction, and monitoring data and events cannot be uploaded to the master station, so that fault points cannot be accurately located. With the development of the low-voltage power internet of things of the state grid, the intelligent molded case circuit breaker matched therewith needs to integrate communication, measurement, protection, control and edge computing. Therefore, it is urgent to design a management module with measurement communication protection function to promote the development of traditional circuit breakers in the direction of high performance, high reliability, intelligence and interconnection. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of electric energy management system with multifunctional communication protection function, integrates communication, measurement, protection, control, promotes the development of traditional circuit breakers in the direction of high performance, high reliability, intelligence and interconnection.

[0004] To solve the above technical problems, the embodiments of the utility model provide the following technical solutions:

[0005] A kind of electric energy management system with multifunctional communication protection function, comprising: management module and multiple electric meters connected with management module communication, the management module is connected with master station communication by concentrator;

[0006] The management module includes microprocessor and power module, carrier wave module, storage module, RS485 module, AD converter, electric energy measurement module, opening and closing mechanism, on-off input module, on-off output module electrically connected with the microprocessor, the electric energy measurement module is electrically connected with signal conditioning module, the AD converter is electrically connected with the output end of multiplexed analog switch, the input end of multiplexed analog switch is electrically connected with signal conditioning module, and the signal conditioning module is electrically connected with measurement voltage transformer, measurement current transformer and protection current transformer;

[0007] The carrier wave module is connected with concentrator communication, and the concentrator is connected with master station communication, and the RS485 module has multiple, and is connected with electric energy meter communication respectively.

[0008] Optionally, the microprocessor is a single-chip microcomputer or an ARM processor.

[0009] Optionally, the carrier wave module is a HPLC and HRF dual-mode communication carrier wave module.

[0010] Optionally, the electric energy metering module is an electric energy metering chip.

[0011] Optionally, the opening and closing mechanism is an electronic release.

[0012] Optionally, the switch input module and the switch output module are both switch input and output modules based on a photoelectric diode.

[0013] Optionally, the signal conditioning module is a second-order RC filter circuit.

[0014] Optionally, the multi-path analog switch adopts a change-over switch chip.

[0015] Optionally, the main station is a server.

[0016] Optionally, the electric energy meter is a single-phase or three-phase electric energy meter.

[0017] The beneficial effects of the above technical solution of the utility model are as follows:

[0018] The utility model adopts HPLC and HRF double-mode communication carrier modules, realizes the transmission of data on the power line in double channels, bidirection, high speed and stability. The signal conditioning module is adopted, can effectively filter the high-order harmonic contained in the voltage signal from the voltage transformer, avoids the signal aliasing caused by the increase of signal frequency due to high-order harmonic, guarantees the accuracy of input signal. Voltage, current, active, reactive, electric energy meter line loss, electric energy quality and other parameter monitoring can be carried out, and protection control and electricity stealing monitoring can be carried out based on the collected voltage and current data under the abnormal condition of power line. The switch input and output modules are both based on photoelectric diode design, the switch input loop can collect the auxiliary contact switch state of electrical control devices such as circuit breaker and disconnecting switch, the switch output includes outlet loop and element self-checking circuit, selects optocoupler device for isolation, optocoupler adopts Darlington loop, has strong driving capacity and is simple and reliable, ensures the accurate monitoring of electrical equipment switch state and the reliable output of control command. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall principle block diagram of the electric energy management system with multifunctional communication protection function of the utility model;

[0020] Figure 2 It is the management module principle block diagram of the electric energy management system with multifunctional communication protection function of the utility model;

[0021] Figure 3 It is the signal conditioning module circuit principle diagram of the utility model;

[0022] Figure 4 It is the switch input module circuit principle diagram of the utility model;

[0023] Figure 5 The utility model discloses a switch quantity output module circuit principle diagram. DETAILED DESCRIPTION

[0024] In order to make the technical problem, technical scheme and advantage that the utility model is going to solve more clear, below will combine the drawing and specific embodiment and carry out the detailed description.

[0025] As Figure 1 And 2 The utility model provides a kind of electric energy management system with multifunctional communication protection function, including management module 1 and multiple electric meter 4 with management module 1 communication connection, management module 1 is communicated with main station 3 by concentrator.

[0026] The management module 1 includes microprocessor and power module, carrier wave module, storage module, RS485 module, AD converter, electric energy metering module, opening and closing mechanism, switch quantity input module, switch quantity output module electrically connected with the microprocessor, the electric energy metering module is electrically connected with signal conditioning module, the AD converter is electrically connected with multiplex analog switch output end, multiplex analog switch input end is electrically connected with signal conditioning module, the signal conditioning module is electrically connected with measurement voltage mutual inductor, measurement current mutual inductor, protection current mutual inductor.

[0027] The carrier wave module is communicated with concentrator 2, and concentrator 2 is communicated with main station 3, and the RS485 module has multiple, and is communicated with electric energy meter 4 respectively.

[0028] Microprocessor is single-chip microcomputer or ARM processor, and its model is not specifically limited, for example 51 series single-chip microcomputer, STM32 series single-chip microcomputer.

[0029] Carrier wave module is HPLC and HRF dual-mode communication carrier wave module, which adopts high-speed power line carrier wave communication HPLC and high-speed wireless communication technology HRF to carry out data transmission, realizes the transmission of data on power line in double channel two-way, high speed and stability.

[0030] Electric energy metering module is electric energy metering chip, such as ATT7022E, ATT7022E is a kind of high-precision and powerful multifunctional anti-theft electric three-phase electric energy special metering chip, it integrates seven-way second-order sigma-delta ADC, three-way is used for three-phase voltage sampling, three-phase is used for three-phase current sampling, and one-way can be used for zero line current or other anti-theft electric parameter sampling, output sampling data and effective value, the chip is divided into three-phase three-wire system and three-phase four-wire system.

[0031] The switching mechanism is an electronic trip unit. When the line experiences overvoltage, overcurrent, leakage, or electric shock, the vector sum of the currents passing through the zero-sequence current transformer is not equal to zero. Voltage is generated on both sides of the secondary coil of the transformer and amplified by the integrated circuit. When the set value is reached, the power supply is cut off within 0.1 seconds through the leakage trip unit, thereby playing the role of electric shock and leakage protection.

[0032] Both the digital input module and the digital output module are based on photodiodes for digital input and output. For example... Figure 4 The diagram shown is a schematic of a digital input module. The digital input circuit primarily collects the status of auxiliary contacts from electrical control devices such as circuit breakers and disconnectors. Figure 5 The diagram shows the circuit schematic of the digital output module. The digital output has two circuits: an output circuit and a component self-test circuit. The output circuit serves as the connection between the device and the external environment, similar to the input circuit. Optocouplers are used for isolation; the selected optocoupler model is TLP-127. The optocoupler employs a Darlington circuit, known for its superior driving capability and simple reliability.

[0033] like Figure 3 As shown, the signal conditioning module is a second-order RC filter circuit, used to filter out high-order harmonics contained in the voltage signal from the voltage transformer. This is because if the high-order harmonic content in the analog signal is very high, it will cause the signal frequency to increase, which will lead to signal aliasing.

[0034] The multi-channel analog switch uses a switching chip, such as the CD4053 multi-channel switch. This invention uses multiple analog inputs, including voltage measurement, current measurement, and protection current. If analog quantities used to measure other sensors (such as temperature) are also retained, there will be many analog inputs. Using the CD4053 multi-channel switch can reduce the pressure on the input ports of the AD converter.

[0035] In addition, main station 3 is a server used for monitoring the power data of the entire system. Power meter 4 is a single-phase or three-phase power meter, which can collect single-phase power data or three-phase power data.

[0036] The working principle of the technical solution provided by this utility model is as follows:

[0037] like Figure 1 As shown, the management module is connected to single-phase or three-phase electricity meters on site. The single-phase or three-phase electricity meters are connected to the power line and are used to collect power data from power devices such as distribution boxes, power loads, and electrical equipment. Multiple single-phase and three-phase electricity meters are connected to the switch. The management module is connected to the concentrator through dual-mode carrier communication HPLC and HRF. The concentrator will send the data or events collected by the management module to the master station through power line carrier.

[0038] likeFigure 2 As shown, the management module 1 includes a microprocessor and a power module, a carrier wave module, a storage module, an RS485 module, an AD converter, an electric energy metering module, a switching mechanism, a switching value input module, and a switching value output module electrically connected with the microprocessor. The microprocessor is connected with the carrier wave module, realizes collection of electric energy data signals on the power line through the carrier wave module, and sends the signals to the concentrator. The microprocessor is connected with the protection module, used for controlling tripping protection, and the protection module has overvoltage and overcurrent protection, can collect the size of voltage and current through a sampling circuit, realizes monitoring of current and voltage in the circuit, and when the current or voltage value exceeds a specified range, makes the protection module alarm or trips to protect the circuit. The electric energy metering module obtains electric energy signals through collection of voltage and current signals on the power line. The RS485 module can be multiple, communicates with multiple electric meters through the RS485 module, and regularly copies data of all electric meters, and when electricity stealing occurs, alarms and reports to the master station. The AD converter is combined with a multi-channel analog switch to realize collection of data such as measured voltage, measured current, and protection current in the line.

[0039] The utility model discloses a design above, adopt HPLC and HRF double mode communication carrier wave module, realize data on power line double channel two -way, high -speed, stable transmission. Adopt signal conditioning module, can effectively filter the voltage signal that comes from voltage mutual inductor contains high order harmonic, avoid because high order harmonic leads to signal frequency increase and causes signal aliasing, guarantee the accuracy of input signal. Can monitor parameters such as voltage, current, active, reactive, electric energy meter line loss, power quality, and based on the voltage, current data collected under the abnormal condition of power line carries out protection control, electricity stealing monitoring. Switching value input, output module are all based on photoelectric diode design, switching value input loop can collect the auxiliary contact switch state of electrical controller such as circuit breaker, isolating switch, and switching value output includes outlet loop and element self -checking circuit, selects opto -coupler device to isolate, opto -coupler adopts darlington loop, and driving capacity is strong and simple and reliable, ensures accurate monitoring of the switching state of electrical equipment and reliable output of control command.

[0040] The above is the preferred embodiment of the utility model, it should be pointed out, for ordinary skill for the person in the art, without departing from the principle of the utility model, can make a number of improvements and refinements under the premise, these improvements and refinements also should be regarded as the protection scope of the utility model.

Claims

1. An electric power management system having a multi-functional communication protection function, characterized by, The utility model relates to a kind of management module and multiple electric meter connected with management module communication, the management module is connected with main station communication by concentrator; The management module includes microprocessor and power module, carrier wave module, storage module, RS485 module, AD converter, electric energy metering module, opening and closing mechanism, switching value input module, switching value output module electrically connected with the microprocessor, the electric energy metering module is electrically connected with signal conditioning module, the AD converter is electrically connected with multiplexing analog switch output end, the multiplexing analog switch input end is electrically connected with signal conditioning module, the signal conditioning module is electrically connected with measurement voltage transformer, measurement current transformer, protection current transformer; The carrier wave module is connected with concentrator communication, the concentrator is connected with main station communication, and the RS485 module has multiple, respectively with electric energy meter communication connection. The microprocessor is single-chip microcomputer or ARM processor.

2. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The carrier wave module is HPLC and HRF dual-mode communication carrier wave module.

3. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The electric energy metering module is electric energy metering chip.

4. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The opening and closing mechanism is electronic release.

5. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The switching value input module and switching value output module are both switching value input and output module based on photodiode.

6. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The signal conditioning module is second-order RC filter circuit.

7. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The multiplexing analog switch uses conversion switch chip.

8. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The main station is server.

9. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, The electric energy meter is single-phase or three-phase electric energy meter.

10. The electrical energy management system with multi-functional communication protection function according to claim 1, characterized in that, ​

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