CN219329641U - Monitoring device for 48V direct-current power supply system of distribution network - Google Patents
Monitoring device for 48V direct-current power supply system of distribution network Download PDFInfo
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- CN219329641U CN219329641U CN202223433812.4U CN202223433812U CN219329641U CN 219329641 U CN219329641 U CN 219329641U CN 202223433812 U CN202223433812 U CN 202223433812U CN 219329641 U CN219329641 U CN 219329641U
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
Abstract
The utility model relates to the technical field of power supply monitoring, in particular to a monitoring device of a 48V direct current power supply system of a distribution network, which comprises a monitoring host, a charging module, a dual-power supply controller, a communication module and a switch controller. According to the utility model, 48V direct current converted by an alternating current bus is converted into 24V direct current through the charging module, so that power is supplied to the monitoring host, the monitoring host collects circuit data in real time and uploads fault information to the background monitoring host through the communication module, wherein the communication module supports standard MODBUS communication protocol, 101 protocol and 104 protocol, the communication range can be widened, the application range of the monitoring device is widened, and the communication speed can be improved and the communication interference is reduced by ensuring smooth communication between each bottom module and the monitoring host through arranging a plurality of RS485 communication interfaces in one-to-one correspondence with each bottom module.
Description
Technical Field
The utility model relates to the technical field of power supply monitoring, in particular to a monitoring device of a 48V direct current power supply system of a distribution network.
Background
The direct current system is widely applied to hydraulic power plants and thermal power plants, various substations and other users using direct current equipment, such as power plants, substations, power distribution stations, petrifaction, steel, electrified railways, real estate and the like, and provides direct current power for signal equipment, protection, automatic devices, accident lighting and breaker opening and closing operations.
In a power grid direct current system, an alternating current bus is generally converted into 48V direct current through an AC/DC module, one part of the direct current is used for supplying power to a storage battery, the other part of the direct current is connected to other branches of a feeder line, however, the existing power system monitoring device adopts lower 12V or 24V direct current for supplying power, the module output power or the battery cannot be directly used for supplying power, a 48V converter is additionally arranged, only one path of RS485 communication interface is required to be communicated with a bottom module, a protocol conversion box is required to be converted into RS485 communication during background communication, and the use limitation of the power system monitoring device is larger, so that the power distribution network 48V direct current power system monitoring device is provided.
Disclosure of Invention
The utility model aims to provide a monitoring device for a 48V direct current power supply system of a distribution network, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the utility model provides a monitoring device for a 48V dc power supply system of a distribution network, comprising a monitoring host, a charging module, a dual power supply controller, a communication module and a switch controller, wherein the charging module is connected with the monitoring host, the monitoring host is connected with the dual power supply controller, the communication module and the switch controller, the charging module is used for supplying power to the monitoring host, the monitoring host is used for detecting circuit data, the dual power supply controller is used for switching to a standby power supply when a main power supply fails, the communication module is used for transmitting information acquired by the monitoring host to a remote control system, and the switch controller is used for controlling the on-off of a circuit in the dc power supply system.
As a further improvement of the technical scheme, the monitoring host comprises a liquid crystal display screen and a sampling main board, the liquid crystal display screen and the sampling main board are combined into a whole, and the monitoring host is connected with a current sensor.
As a further improvement of the technical scheme, the monitoring host is provided with a communication interface, the communication interface comprises a first interface, a second interface and a third interface, the dual-power controller is connected with the monitoring host through the first interface, the communication module is connected with the monitoring host through the second interface, and the switch controller is connected with the monitoring host through the third interface.
As a further improvement of the technical scheme, a conversion circuit is arranged in the charging module, the conversion circuit comprises chips U5 and U6, a resistor R2, capacitors C13, C14, C15, C16, C17 and C18 and a diode D3, wherein,
the INPUT pin of the chip U5 is connected with the resistor R2 and the capacitors C17 and C18 in parallel with Vcc;
the GND pin of the chip U5 is connected with the diode D3 in parallel connection with the other end of the resistor R2, and the other end of the diode D3 is connected with the other ends of the capacitors C17 and C18 in parallel connection with Vcc;
the OUTPUT pin of the chip U5 is connected with the capacitors C14 and C15 in parallel and connected with the INPUT pin of the chip U6, and the capacitors C14 and C15 are connected with the GND pin of the chip U6 and the capacitors C13 and C16 in parallel and connected with the diode D3 and then connected with the GND end;
the OUTPUT pin of the chip U6 is connected with the other ends of the capacitors C13 and C16 in parallel with the Vout end.
As a further improvement of the technical scheme, the monitoring host is also provided with a detection circuit, the detection circuit comprises a comparator U4, resistors R10, R14, R17 and R20 and a capacitor C24, wherein,
the comparator U4 is connected with the resistors R10 and R14, the resistor R10 is connected with the capacitor C24 in parallel connection with an ADC-V end, and the capacitor C24 is grounded;
the positive electrode of the comparator U4 is connected with the resistors R17 and R20, the resistor R17 is connected with the CS end, and the resistor R20 is connected with the Vout end;
the negative terminal of the comparator U4 is connected to the resistor R14.
Compared with the prior art, the utility model has the beneficial effects that:
in the monitoring device of the 48V direct current power supply system of the distribution network, 48V direct current converted by an alternating current bus is converted into 24V direct current through the charging module, so that the monitoring host is supplied with power, the monitoring host collects circuit data in real time and uploads fault information to a background monitoring host through the communication module, wherein the communication module supports standard MODBUS communication protocol, 101 protocol and 104 protocol, can widen the communication range so as to expand the application range of the monitoring device, and corresponds to each bottom module one by one through being provided with a plurality of paths of RS485 communication interfaces, so that smooth communication between each bottom module and the monitoring host can be ensured, the communication speed is improved, and communication interference is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a circuit diagram of the conversion circuit of the present utility model;
fig. 3 is a diagram of a detection circuit according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1
Referring to fig. 1-3, the present embodiment provides a monitoring device for a 48V dc power supply system of a distribution network, including a monitoring host, a charging module, a dual-power controller, a communication module and a switch controller, where the charging module is connected with the monitoring host, the monitoring host is connected with the dual-power controller, the communication module and the switch controller, the charging module is used for supplying power to the monitoring host, the monitoring host is used for detecting circuit data, the dual-power controller is used for switching to a standby power supply when the main power fails, the communication module is used for transmitting information collected by the monitoring host to a remote control system, and the switch controller is used for controlling on-off of a circuit in the dc power supply system.
The charging module converts the 48V direct current converted by the alternating current bus into direct current with lower voltage so as to supply power to the monitoring host, when a main power supply in the direct current power supply system fails, the dual power supply controller can automatically switch to enable the standby power supply, the monitoring host collects data in the circuit and controls the switch controller to perform corresponding on-off operation on the circuit, and the communication module is used for transmitting the data collected by the monitoring host to a remote control system.
The communication module of the embodiment supports standard MODBUS communication protocols, 101 protocols and 104 protocols, and can widen the communication range, so as to expand the application range of the monitoring device.
In the utility model, in order to facilitate the direct collection of circuit data, the monitoring host comprises a liquid crystal display screen and a sampling main board, the liquid crystal display screen and the sampling main board are combined into one, the monitoring host is connected with a current sensor, the monitoring host supports the collection of alternating voltage, direct voltage and battery current by combining the liquid crystal display screen and the sampling main board into one, 8 paths of switching value input signals are additionally supported to be collected, 4 paths of fault switching value output signals are provided, and important data can be directly obtained.
In order to reduce communication interference between bottom modules, be equipped with RS485 communication interface on the monitor, communication interface includes first interface, second interface and third interface, dual supply controller is connected with the monitor through first interface, communication module is connected with the monitor through the second interface, switch controller is connected with the monitor through the third interface, through being equipped with multichannel RS485 communication interface and each bottom module one-to-one, can ensure the smooth communication of each bottom module and monitor, improve communication speed, reduce communication interference.
In order to facilitate the electricity consumption of the monitoring device, a conversion circuit is arranged in the charging module, the conversion circuit comprises chips U5 and U6, a resistor R2, capacitors C13, C14, C15, C16, C17 and C18 and a diode D3, wherein,
the INPUT pin of the chip U5 is connected with the resistor R2, the capacitors C17 and C18 in parallel and Vcc;
the GND pin of the chip U5 is connected with the other end of the diode D3 in parallel connection with the resistor R2, the other end of the diode D3 is connected with the other ends of the capacitors C17 and C18 in parallel connection with Vcc;
the OUTPUT pin of the chip U5 is connected with the capacitors C14 and C15 in parallel with the INPUT pin of the chip U6, and the capacitors C14 and C15 are connected with the GND pin of the chip U6 and the capacitors C13 and C16 in parallel with the diode D3 and then connected with the GND end;
the OUTPUT pin of the chip U6 is connected with the other ends of the capacitors C13 and C16 in parallel connection with the Vout end.
In the conversion circuit, the chips U5 and U6 are L7812CV chips, when the Vcc end inputs 48V direct current, the diode D3 bears negative pressure to turn off, and the capacitor charges, so that in the capacitor for storing electric energy, a loop is formed when current returns to pass through the diode D3, and the 48V direct current is converted into 24V direct current required by the monitoring device, thereby being convenient for the power consumption of the monitoring device.
In order to collect circuit data conveniently, the monitoring host is also provided with a detection circuit, wherein the detection circuit comprises a comparator U4, resistors R10, R14, R17 and R20 and a capacitor C24,
the comparator U4 is connected with the resistors R10 and R14, the resistor R10 is connected with the capacitor C24 in parallel with the ADC-V end, and the capacitor C24 is grounded;
the positive electrode of the comparator U4 is connected with resistors R17 and R20, the resistor R17 is connected with a CS end, and the resistor R20 is connected with a Vout end;
the negative terminal of comparator U4 terminates resistor R14.
The detection circuit is a differential circuit, the comparator U4 is an operational amplifier comparator, the voltage in the circuit is reduced to a range which can be sampled by the ADC-V end in proportion through the comparator U4, and then the voltage value in the circuit is obtained through sampling by the ADC-V end, so that the acquisition of circuit data is facilitated.
When the monitoring device for the 48V direct current power supply system of the distribution network is specifically used, the charging module converts the 48V direct current converted by the alternating current bus into the direct current with lower voltage so as to supply power to the monitoring host, the dual-power controller can automatically switch to enable the standby power supply when the main power supply in the direct current power supply system fails, the monitoring host collects circuit data such as the voltage of the alternating current bus, the voltage of the direct current bus and the battery current in real time, the alternating current and direct current running state in the system is judged in real time, fault information is uploaded to the background monitoring host through the communication module, and the switching controller is controlled to perform corresponding on-off operation on the circuit, wherein the communication module supports the standard MODBUS communication protocol, the 101 protocol and the 104 protocol, so that the application range of the monitoring device can be widened, the one-to-one correspondence between each bottom module and the monitoring host can be ensured through the arrangement of a plurality of RS485 communication interfaces, the communication speed is improved, and communication interference is reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. A distribution network 48V direct current power supply system monitoring device is characterized in that: including monitor, charge module, dual supply controller, communication module and switch controller, charge module is connected with the monitor, the monitor is connected dual supply controller communication module with switch controller, charge module be used for the monitor power supply, the monitor is used for detecting circuit data, dual supply controller is used for switching over to stand-by power supply when main power failure, communication module be used for with the information transmission that the monitor gathered to remote control system, switch controller is used for controlling the break-make of circuit in the DC power supply system.
2. The distribution network 48V dc power system monitoring device according to claim 1, wherein: the monitoring host comprises a liquid crystal display screen and a sampling main board, the liquid crystal display screen and the sampling main board are combined into a whole, and the monitoring host is connected with a current sensor.
3. The distribution network 48V dc power system monitoring device according to claim 1, wherein: the monitoring host is provided with a communication interface, the communication interface comprises a first interface, a second interface and a third interface, the dual-power controller is connected with the monitoring host through the first interface, the communication module is connected with the monitoring host through the second interface, and the switch controller is connected with the monitoring host through the third interface.
4. The distribution network 48V dc power system monitoring device according to claim 1, wherein: the charging module is internally provided with a conversion circuit which comprises chips U5 and U6, a resistor R2, capacitors C13, C14, C15, C16, C17 and C18 and a diode D3, wherein,
the INPUT pin of the chip U5 is connected with the resistor R2 and the capacitors C17 and C18 in parallel with Vcc;
the GND pin of the chip U5 is connected with the diode D3 in parallel connection with the other end of the resistor R2, and the other end of the diode D3 is connected with the other ends of the capacitors C17 and C18 in parallel connection with Vcc;
the OUTPUT pin of the chip U5 is connected with the capacitors C14 and C15 in parallel and connected with the INPUT pin of the chip U6, and the capacitors C14 and C15 are connected with the GND pin of the chip U6 and the capacitors C13 and C16 in parallel and connected with the diode D3 and then connected with the GND end;
the OUTPUT pin of the chip U6 is connected with the other ends of the capacitors C13 and C16 in parallel with the Vout end.
5. The distribution network 48V dc power system monitoring device according to claim 2, wherein: the monitoring host is also provided with a detection circuit which comprises a comparator U4, resistors R10, R14, R17 and R20 and a capacitor C24, wherein,
the comparator U4 is connected with the resistors R10 and R14, the resistor R10 is connected with the capacitor C24 in parallel connection with an ADC-V end, and the capacitor C24 is grounded;
the positive electrode of the comparator U4 is connected with the resistors R17 and R20, the resistor R17 is connected with the CS end, and the resistor R20 is connected with the Vout end;
the negative terminal of the comparator U4 is connected to the resistor R14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223433812.4U CN219329641U (en) | 2022-12-21 | 2022-12-21 | Monitoring device for 48V direct-current power supply system of distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223433812.4U CN219329641U (en) | 2022-12-21 | 2022-12-21 | Monitoring device for 48V direct-current power supply system of distribution network |
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| Publication Number | Publication Date |
|---|---|
| CN219329641U true CN219329641U (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223433812.4U Active CN219329641U (en) | 2022-12-21 | 2022-12-21 | Monitoring device for 48V direct-current power supply system of distribution network |
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| CN (1) | CN219329641U (en) |
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- 2022-12-21 CN CN202223433812.4U patent/CN219329641U/en active Active
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