CN210053250U - Comprehensive power utilization management controller - Google Patents

Comprehensive power utilization management controller Download PDF

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Publication number
CN210053250U
CN210053250U CN201921054619.5U CN201921054619U CN210053250U CN 210053250 U CN210053250 U CN 210053250U CN 201921054619 U CN201921054619 U CN 201921054619U CN 210053250 U CN210053250 U CN 210053250U
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unit
chip
main control
control chip
interface
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CN201921054619.5U
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梁振东
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SHENZHEN GREAT ENERGY TECHNOLOGY CO LTD
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SHENZHEN GREAT ENERGY TECHNOLOGY CO LTD
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Abstract

The utility model discloses a synthesize power consumption management controller, the controller includes main control chip, drive chip, condenser switching unit, the human-computer interaction unit, communication unit, memory cell, biasing circuit unit and electrical unit, condenser switching unit connects on drive chip, drive chip connects on main control chip, the human-computer interaction unit connects on main control chip, memory cell is connected with main control chip, communication unit is connected with main control chip, be connected with the biasing circuit unit on the main control chip, be connected with current transformer and voltage transformer on the biasing circuit unit, electrical unit is used for the power supply. The utility model discloses can realize functions such as electric wire netting electric energy quality on-line monitoring, automatic power factor control and the electric capacity switching of innovation, trouble record ripples storage, wireless communication.

Description

Comprehensive power utilization management controller
Technical Field
The utility model discloses an electricity consumption management controller, especially a synthesize electricity consumption management controller relates to automation technology and information technology field, especially a electric capacity switching to automatic power factor control and innovation.
Background
In a low-voltage distribution network, the centralized capacitor compensation of most distribution transformers only has a simple switching function at present, and lacks necessary monitoring, protection and management. With the gradual development of distribution networks, the operation mode is far from meeting the application requirements of modern distribution network users. From the view of operation safety, in the actual operation process, the fault of the capacitor is frequent due to factors such as temperature rise, harmonic waves, frequent switching and the like; the capacitor can not be cut off in time and develops into a short-circuit fault, thereby causing the operation accidents of tripping on the outlet side of the power distribution station and burning out the capacitor.
From the view point of operation and maintenance, the capacitor lacks necessary measuring and controlling means, the operation condition and the current situation of equipment are not clear, and unbalanced switching easily causes the capacitor capacity to decline prematurely, the operation and maintenance efficiency to be low and the technical means to be lagged behind. From the perspective of power consumption management, modern data acquisition monitoring, transmission and management means are lacked, and the voltage quality of a user is not clear, the power consumption condition is not clear, and the power consumption management method is not beneficial to the economic operation of a power distribution network.
Disclosure of Invention
The centralized capacitor compensation to above-mentioned distribution transformer among the prior art only has simple switching function, lacks the shortcoming of necessary control, protection and management, the utility model provides a synthesize power consumption management controller, it adopts special circuit structure design, can realize control, record and the remote management of electric energy.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a synthesize power consumption management controller, the controller includes main control chip, driver chip, condenser switching unit, human-computer interaction unit, communication unit, the memory cell, biasing circuit unit and electrical unit, condenser switching unit connects on driver chip, driver chip connects on main control chip, human-computer interaction unit connects on main control chip, storage unit and main control chip are connected, communication unit and main control chip are connected, be connected with the biasing circuit unit on the main control chip, be connected with current transformer and voltage transformer on the biasing circuit unit, electrical unit is used for the power supply.
The utility model provides a technical scheme that its technical problem adopted further still includes:
the driving chip adopts an inverted driver, the capacitor switching unit comprises more than one path of thyristors or relays, each path of capacitor switching unit adopts a photoelectric coupler or a relay, and the photoelectric couplers or the relays are respectively connected on the driving chip.
The man-machine interaction unit comprises a key input unit and a liquid crystal screen driving interface, the key input unit adopts more than one button switch, and the button switch and the liquid crystal screen driving interface are respectively connected with the main control chip.
The storage unit comprises a storage chip and a card reader unit, and the storage chip and the card reader unit are respectively connected with the main control chip.
The main control chip is also connected with a USB interface.
The communication unit comprises an RS-485 interface, a GPRS communication unit and an RJ45 network interface, the RS-485 interface is connected onto an isolator, the isolator is connected onto a main control chip, the GPRS communication unit adopts a communication chip and an SIM card interface, the SIM card interface is connected onto the communication chip, the communication chip is connected onto the main control chip through a serial interface, the RJ45 network interface is connected onto an Ethernet chip, and the Ethernet chip is connected with the main control chip.
The main control chip is connected with a wireless transmission module.
The master control chip is connected with an input interface unit, the input interface unit comprises eight input interfaces, and each input interface is connected with a photoelectric coupler.
The power supply unit comprises a rectifying circuit unit, a high-frequency transformer and a high-frequency rectifying circuit unit, an external power supply is connected to the rectifying circuit unit, the output end of the rectifying circuit unit is connected with the high-frequency transformer, the output end of the high-frequency transformer is connected with the high-frequency rectifying circuit unit, and the output end of the high-frequency rectifying circuit unit is connected with a voltage stabilizing chip.
The power supply unit further comprises a power supply management chip, and the power supply management chip is connected to the high-frequency transformer.
The utility model has the advantages that: the utility model discloses can realize functions such as electric wire netting electric energy quality on-line monitoring, automatic power factor control and the electric capacity switching of innovation, trouble record ripples storage, wireless communication.
And (3) filtering compensation control: adopt the utility model discloses can adopt different reactive compensation and harmonic to the electrical equipment of different grade type and administer the scheme, make the user through the electric energy quality who improves the electric wire netting, improve electric energy quality and operational reliability. The programmable switching control loop output interface is used for split-phase, phase-to-phase or three-phase compensation, has 1-15 step output, can be selectively used for controlling the switching of an alternating current contactor, a compound switch or a thyristor, can be manually and fixedly switched in, fixedly switched out and shielded and cut off in each output step, can be self-defined in discharge time and control sequence of each group of capacitors, and has a four-quadrant operation function.
Adopt the utility model discloses can realize multi-target capacitor switching optimization strategy: the capacitor bank control system can finely control and use large, medium and small capacitor banks, relieve the unsmooth control phenomenon, further reduce voltage deviation and network loss, reduce the switching times of the capacitors under the condition of ensuring power factors, averagely distribute the switching times and the operation time of the capacitors, and prolong the service life of the capacitors.
Monitoring and protecting: the cooperation the utility model discloses a power capacitor is the key equipment of power factor compensation, and factors such as temperature risees, harmonic, frequent switching make the condenser trouble frequently take place in actual operation, bring very big potential safety hazard. The monitoring and protecting functions can avoid safety accidents, facilitate operation and maintenance and improve the efficiency of the system. Adopt the utility model discloses the protection that cooperation external device can realize high reliability and alarm function has: over-temperature protection of a capacitor, capacity abnormal protection of the capacitor, current out-of-limit protection, overcurrent trip protection, under-current protection, overvoltage protection, low-voltage protection, CT wiring error protection, overtemperature protection of a cabinet body, switching frequency out-of-limit protection, active demand out-of-limit alarm, apparent demand out-of-limit alarm, harmonic out-of-limit alarm, controller abnormal alarm, voltage temporary rise alarm, voltage temporary drop alarm, voltage short-time interruption alarm and power failure alarm.
Electric energy quality analysis and wave recording: the power quality monitoring is used as an auxiliary means for analyzing the operation faults of the power distribution network, an analysis basis is provided for transient phenomena and various fault conditions in the operation process, the safe, stable and economic operation of the power distribution network is guaranteed on the technical level, and potential hidden dangers existing in the power distribution network are discovered as soon as possible. The fault recording can comprehensively record real-time waveforms before and after an accident and during the accident, and can quickly diagnose through detailed accident reason analysis, thereby taking measures in time to eliminate the accident and preventing the accident in the future.
The intelligent electric meter: the system is suitable for the use of new energy, supports users with distributed power generation, and has the functions of power consumption information storage and bidirectional multi-rate metering; a bidirectional data communication function supporting a plurality of data transmission modes; and the management of the power consumption demand is supported, and the economic operation and energy conservation of power consumption are facilitated. The full-electric-quantity data acquisition, on-line monitoring system voltage, current, power grid frequency, real-time active power, real-time apparent power, real-time reactive power, real-time power factor, active demand and apparent demand, and display menus and pictures all adopt Chinese interfaces, so that the system is visual, convenient and easy to operate.
Internet + service: the system uploads the collected power utilization information data to the cloud platform, provides a whole set of application and data analysis platform including power utilization monitoring, operation analysis, energy efficiency management, power quality analysis, equipment management and operation and maintenance management, and provides services for terminal applications based on webpages, mobile networks, mobile APPs and social networks (WeChat).
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
Fig. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic diagram of the circuit of the central controller of the present invention.
Fig. 3 is a schematic diagram of a part of the ethernet control circuit according to the present invention.
Fig. 4 is a schematic diagram of the partial circuit of the I/O port of the present invention.
Fig. 5 is a schematic circuit diagram of the interface part of the present invention.
Fig. 6 is a schematic circuit diagram of a part of the peripheral device of the present invention.
Fig. 7 is a schematic diagram of a circuit of the central controller according to the present invention.
Fig. 8 is a schematic diagram of a second circuit of the central controller of the present invention.
Fig. 9 is a schematic diagram of a partial circuit of the ethernet chip according to the present invention.
Fig. 10 is a schematic circuit diagram of an RJ45 interface according to the present invention.
Fig. 11 is a schematic circuit diagram of a USB interface according to the present invention.
Fig. 12 is a schematic circuit diagram of a part of the reverse driver of the present invention.
Fig. 13 is a schematic circuit diagram of a relay part of the present invention.
Fig. 14 is a schematic diagram of the RS-485 circuit of the present invention.
Fig. 15 is a schematic circuit diagram of the RF communication part of the present invention.
Fig. 16 is a schematic circuit diagram of the power supply of the present invention.
Fig. 17 is a schematic diagram of a part of a GPRS circuit according to the present invention.
Fig. 18 is a schematic circuit diagram of a part of the reference voltage generating circuit according to the present invention.
Fig. 19 is a schematic circuit diagram of a part of the bias circuit unit according to the present invention.
Fig. 20 is a schematic diagram of a part of a 3.3V regulated power supply of the present invention.
Fig. 21 is a schematic circuit diagram of a part of the memory according to the present invention.
Fig. 22 is a schematic circuit diagram of a part of the TF card reader of the present invention.
Fig. 23 is a schematic diagram of a circuit of an input interface part according to the present invention.
Detailed Description
The embodiment is a preferred embodiment of the present invention, and other principles and basic structures are the same as or similar to those of the embodiment, and are within the protection scope of the present invention.
Please refer to fig. 1 to 22 in combination, the present invention mainly comprises a main control chip, a driving chip, a capacitor switching unit, a human-computer interaction unit, a communication unit, a storage unit, a bias circuit unit and a power supply unit, wherein the capacitor switching unit is connected to the driving chip, the driving chip is connected to the main control chip, the main control chip outputs a control signal to the driving chip, the driving chip controls the capacitor switching unit to operate, the human-computer interaction unit is connected to the main control chip, the main control chip inputs a control signal to the main control chip, the main control chip controls the human-computer interaction unit to display the operating state, the storage unit is connected to the main control chip, the storage unit can store the operating data through the storage unit, the communication unit is connected to the main control chip, and can communicate with the upper computer through the communication module for uploading the local data to, the main control chip is connected with a bias circuit unit, the bias circuit unit is connected with a current transformer and a voltage transformer, the current transformer and the voltage transformer are respectively used for collecting current and voltage conditions of a three-phase wire, the current and voltage conditions are input to the main control chip after being processed by the bias circuit unit, and the power supply unit is used for supplying power.
In this embodiment, the main control chip adopts the singlechip that the model is STM32F407ZET, during concrete implementation, also can adopt the singlechip replacement of other models or series. The main control chip is connected with a storage chip, the storage chip adopts a FLASH storage chip with the model of W25Q128, the FLASH storage chip can be used for local storage of data, and the storage chip can also be replaced by other models during specific implementation.
In this embodiment, the driving chip adopts an inverting driver with the model of MC1413, and each driving chip is provided with 7 darlington transistors, so that data buffering can be achieved.
In this embodiment, the bias circuit unit modulates voltage signals output by a voltage transformer and a current transformer inside the controller to be in accordance with the voltage signal processed by the main control chip by using a resistance network, and then inputs the modulated voltage signals to the main control chip.
The human-computer interaction unit includes key input unit and pilot lamp unit, and key input unit adopts more than one button switch, can carry out signal input, and the pilot lamp unit adopts LED, and the LED pilot lamp setting is in the utility model discloses an inside the controller is outside, is the pilot lamp of internal circuit suggestion running state, and key input unit and pilot lamp unit are connected respectively on main control chip's IO mouth, and accessible key input unit carries out signal input, shows through the pilot lamp unit the utility model discloses an operating condition. In this embodiment, the human-computer interaction unit further includes an LCD interface, and the LCD interface is connected to the main control chip and drives the liquid crystal screen connected thereto to display through the main control chip.
In this embodiment, the memory unit includes a card reader unit in addition to the memory chip, and in this embodiment, the card reader unit employs a TF card reader, and the TF card reader is connected to the main control chip in the form of a pull-up resistor, and a TF card can be inserted into the TF card reader, and the TF card is directly used as an auxiliary memory device. In this embodiment, the main control chip is further connected with a USB interface, and the data stored in the controller can be copied through the USB interface. In this embodiment, the USB interface may adopt a standard USB interface, a mini USB interface, a micro USB interface, or a Type C interface.
In the embodiment, the communication unit comprises an RS-485 interface, a GPRS communication unit and an RJ45 network interface, the RS-485 interface is connected to an isolator, and the isolator is connected to a main control chip; one path is used for being connected with the server background for communication, and data are transmitted to the background server through an RS-485 interface; one path is used as a communication interface and is used for equipment maintenance. In this embodiment, the GPRS communication unit employs a communication chip and an SIM card interface, the SIM card interface is connected to the communication chip, and the communication chip is connected to the main control chip through a serial interface. In this embodiment, the RJ45 network interface is connected to the ethernet chip, and the ethernet chip is connected to the main control chip, and may be connected to the server background through the ethernet to transmit data to the server background. In this embodiment, the ethernet chip is an integrated ethernet controller chip with a model DP83848, and in specific implementation, the ethernet chip may be replaced by another ethernet controller chip.
In this embodiment, the main control chip is connected with an input interface unit, the input interface unit includes eight input interfaces, each input interface is connected with a photoelectric coupler, an input external signal is isolated from a signal processed inside the controller, so as to prevent the main control chip from being damaged, and the input interface unit is used for inputting other external signals.
In this embodiment, the main control chip is connected with a wireless transmission module, the wireless transmission module is a CC2530API chip, and in specific implementation, chips of other types may be used for replacement, so that wireless data transmission may be implemented through the wireless transmission module.
In this embodiment, the power supply adopts external power supply, power supply unit include rectifier circuit unit, high frequency transformer and high frequency rectifier circuit unit, external power supply connects on rectifier circuit unit, and rectifier circuit unit output is connected with high frequency transformer, and high frequency transformer output is connected with high frequency rectifier circuit unit, is connected with voltage stabilizing chip on the high frequency rectifier circuit unit output, gives corresponding circuit module power supply. In this embodiment, the power supply unit further includes a power management chip, and the power management chip is connected to the high-frequency transformer.
When the utility model is used, the ST main control chip monitors the power factor state of the power grid in real time, and when the power factor needs to be adjusted, the switching of the capacitor is carried out in real time; meanwhile, the actual switching capacitance capacity of the power grid change before and after each capacitor switching is compared with the set capacitance capacity of the section to obtain the attenuation coefficient of the section of the capacitor, and the quality of the section of the capacitor is judged to prolong the service life and the efficiency of the capacitor; when the capacitor is switched for a certain number of times, the capacitor can be protected; meanwhile, the temperature of the capacitor can be measured through a matched temperature detection unit, and when the temperature of a certain section of the capacitor is abnormal, the abnormal capacitor is cut off in time; the switching of the capacitor is controlled by a pin of the ST main control chip to output, and then the MC1413 drive circuit chip is used for controlling 15 paths of relays or thyristors. When the ST main control chip detects that the power grid has a fault, the fault is recorded, data are firstly cached in the ST main control chip, and after the recording is finished, the data are stored in the SD card.

Claims (10)

1. A comprehensive power utilization management controller is characterized in that: the controller comprises a main control chip, a driving chip, a capacitor switching unit, a human-computer interaction unit, a communication unit, a storage unit, a bias circuit unit and a power supply unit, wherein the capacitor switching unit is connected to the driving chip, the driving chip is connected to the main control chip, the human-computer interaction unit is connected to the main control chip, the storage unit is connected to the main control chip, the communication unit is connected to the main control chip, the bias circuit unit is connected to the main control chip, a current transformer and a voltage transformer are connected to the bias circuit unit, and the power supply unit is used for supplying power.
2. The integrated power management controller of claim 1, wherein: the driving chip adopts an inverted driver, the capacitor switching unit comprises more than one path of thyristors or relays, each path of capacitor switching unit adopts a photoelectric coupler or a relay, and the photoelectric couplers or the relays are respectively connected on the driving chip.
3. The integrated power management controller of claim 1, wherein: the man-machine interaction unit comprises a key input unit and a liquid crystal screen driving interface, the key input unit adopts more than one button switch, and the button switch and the liquid crystal screen driving interface are respectively connected with the main control chip.
4. The integrated power management controller of claim 1, wherein: the storage unit comprises a storage chip and a card reader unit, and the storage chip and the card reader unit are respectively connected with the main control chip.
5. The integrated power management controller of claim 1, wherein: the main control chip is also connected with a USB interface.
6. The integrated power management controller of claim 1, wherein: the communication unit comprises an RS-485 interface, a GPRS communication unit and an RJ45 network interface, the RS-485 interface is connected onto an isolator, the isolator is connected onto a main control chip, the GPRS communication unit adopts a communication chip and an SIM card interface, the SIM card interface is connected onto the communication chip, the communication chip is connected onto the main control chip through a serial interface, the RJ45 network interface is connected onto an Ethernet chip, and the Ethernet chip is connected with the main control chip.
7. The integrated power management controller of claim 1, wherein: the main control chip is connected with a wireless transmission module.
8. The integrated power management controller of claim 1, wherein: the master control chip is connected with an input interface unit, the input interface unit comprises eight input interfaces, and each input interface is connected with a photoelectric coupler.
9. The integrated power management controller of claim 1, wherein: the power supply unit comprises a rectifying circuit unit, a high-frequency transformer and a high-frequency rectifying circuit unit, an external power supply is connected to the rectifying circuit unit, the output end of the rectifying circuit unit is connected with the high-frequency transformer, the output end of the high-frequency transformer is connected with the high-frequency rectifying circuit unit, and the output end of the high-frequency rectifying circuit unit is connected with a voltage stabilizing chip.
10. The integrated power management controller of claim 9, wherein: the power supply unit further comprises a power supply management chip, and the power supply management chip is connected to the high-frequency transformer.
CN201921054619.5U 2019-07-04 2019-07-04 Comprehensive power utilization management controller Active CN210053250U (en)

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Application Number Priority Date Filing Date Title
CN201921054619.5U CN210053250U (en) 2019-07-04 2019-07-04 Comprehensive power utilization management controller

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Application Number Priority Date Filing Date Title
CN201921054619.5U CN210053250U (en) 2019-07-04 2019-07-04 Comprehensive power utilization management controller

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CN210053250U true CN210053250U (en) 2020-02-11

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Country Link
CN (1) CN210053250U (en)

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