Intelligent power distribution terminal timing system based on Beidou timing calibration
Through the intelligent distribution terminal timing system based on Beidou timing calibration, the time synchronization of terminal equipment is achieved using Beidou satellite signals, solving the problem of timing accuracy of distribution terminals, achieving high-accurate time synchronization and multi-function monitoring and protection, meeting the needs of the distribution network.
Patent Information
- Application Number
- CN202422387092.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing power distribution terminals lack high-accuracy timing functions, which affects the accuracy of data collection, power outage records and electricity bill settlement.
The combination system of Beidou GPS satellite, time synchronization server, switch, time server, power distribution terminal and pointer sub-clock is adopted to realize the time synchronization of terminal equipment through Beidou satellite signals, and combine the power metering module, overcurrent protection module, etc. to achieve multifunctional monitoring and protection.
It realizes high accuracy synchronization between the distribution terminal and the system clock, ensures the accuracy of data collection and electricity bill settlement, and has overcurrent detection, line loss measurement and protection functions to meet the diversified needs of the distribution network.
Smart Images
Figure CN223168089U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of distribution terminals, in particular to an intelligent distribution terminal time service system based on Beidou timing calibration. Background Technique
[0002] A distribution terminal (abbreviated as FTU) has functions of remote control, remote measurement, remote signaling and fault detection, communicates with a distribution automation master station, provides information on the operation status of the distribution system and various parameters and monitoring and control requirements, including switch status, electrical energy parameters, phase-to-phase faults, ground faults and parameters during faults, and executes commands issued by the distribution master station to adjust and control distribution equipment, realizing functions such as fault location, fault isolation and rapid restoration of power supply in non-fault areas. It is applicable to the automation projects of urban, rural and enterprise distribution networks, and completes automation functions such as monitoring, control and protection of ring main units and pole-mounted switches as well as communication. Cooperating with a distribution sub-station and a master station to realize normal monitoring of distribution lines and fault identification, isolation and restoration of power supply in non-fault sections.
[0003] Existing distribution terminals need to add a time synchronization function to support the protocol communication time synchronization method, receive time synchronization commands from the master station or other time synchronization devices, and keep in sync with the system clock. The accuracy of the distribution terminal clock is of great significance for accurately recording events such as data collection and power outages, accurately measuring the power consumption in different time periods, and settling the electricity bills of thousands of households. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide an intelligent distribution terminal time service system based on Beidou timing calibration, which realizes the time service function of the distribution terminal, enables the terminal to keep in sync with the system clock, and has relatively high accuracy.
[0005] To solve the above technical problem, the embodiment of the utility model provides the following technical solution:
[0006] An intelligent distribution terminal time service system based on Beidou timing calibration includes a Beidou GPS satellite, a timing antenna, a time synchronization server, a switch, a time server, a distribution terminal, a computer and a pointer clock. The Beidou GPS satellite is wirelessly communicatively connected to the timing antenna, the timing antenna is wire communicatively connected to the time synchronization server, the time synchronization server is wire communicatively connected to the switch, and the time server, the distribution terminal, the computer and the pointer clock are all connected to the switch;
[0007] The distribution terminal includes a microprocessor and an electric energy metering module, an overcurrent protection module, a digital output module, a power supply module, a line loss module, a memory, a network interface module, a 4G / 5G wireless communication module, and a display module that are electrically connected to the microprocessor. The input end of the electric energy metering module is connected to a signal conditioning module, and the input end of the signal conditioning module is connected to a voltage acquisition module and a current acquisition module. The output end of the current acquisition module is also connected to the overcurrent protection module.
[0008] Optionally, the time synchronization server is a Beidou NTP network time server.
[0009] Optionally, the digital output module includes an optoelectronic isolation chip and a relay group connected to the output end of the optoelectronic isolation chip. The digital signals output by the relay group are opening, closing, and locking signals.
[0010] Optionally, the pointer type sub-clock is an xbd706 type pointer type sub-clock.
[0011] Optionally, the network interface module is an Ethernet port.
[0012] Optionally, the microprocessor is any one of a single-chip microcomputer, a DSP, or an ARM processor.
[0013] Optionally, the signal conditioning module includes a first-order RC filter circuit and an operational amplifier circuit connected to the output end of the first-order RC filter circuit.
[0014] Optionally, the electric energy metering module is an ADE7755 electric energy metering chip.
[0015] Optionally, the overcurrent protection module is a window comparison circuit based on an operational amplifier.
[0016] Optionally, the model of the line loss module is F-PIC100.
[0017] The beneficial effects of the above technical solutions of the present utility model are as follows:
[0018] 1. The Beidou NTP network time server of the present utility model receives Beidou satellite time information through a satellite antenna, transmits it to the time server through a coaxial cable, the time server receives the satellite signal through an internal receiver to synchronize the time of the local machine, and then transmits it to the xbd706 type pointer type sub-clock, the distribution terminal, and other network terminal devices through the NTP network, so that the terminal distribution equipment is time-synchronized with the time server, and the accuracy is relatively high.
[0019] 2. The power distribution terminal of the present utility model collects voltage and current signals on the power distribution line through a voltage acquisition module and a current acquisition module. After signal processing by a signal conditioning module, the power is calculated by an electric energy metering module, and the operating states of key parameters such as voltage, current, and power factor of the power distribution network are monitored in real time. The parameters are stored and displayed in real time, and the data is transmitted to the monitoring center through a 4G or 5G wireless network. At the same time, this terminal has an overcurrent detection function and a line loss measurement function. When overcurrent occurs, protections such as opening, closing, and locking can be activated. It has diverse functions and can well meet the requirements of the power distribution network. Description of the Drawings
[0020] Figure 1 It is a schematic diagram of the topology structure of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model;
[0021] Figure 2 It is a principle block diagram of the power distribution terminal of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model;
[0022] Figure 3 It is a schematic circuit diagram of the current acquisition module of the power distribution terminal of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model;
[0023] Figure 4 It is a schematic circuit diagram of the overcurrent protection module of the power distribution terminal of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model;
[0024] Figure 5 It is a schematic circuit diagram of the voltage sampling module of the power distribution terminal of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model;
[0025] Figure 6 It is a schematic circuit diagram of the signal conditioning module of the power distribution terminal of the time synchronization system for the intelligent power distribution terminal based on Beidou timing calibration of the present utility model. Detailed Embodiment
[0026] To make the technical problems, technical solutions, and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the drawings and specific embodiments.
[0027] As Figure 1As shown in the figure, the present utility model proposes an intelligent power distribution terminal timing system based on Beidou timing calibration, which includes a Beidou GPS satellite 1, a timing antenna 2, a time synchronization server 3, a switch 4, a time server 5, a power distribution terminal 6, a computer 7, and a pointer type clock 8. The Beidou GPS satellite 1 is wirelessly communicatively connected to the timing antenna 2, the timing antenna 2 is wired communicatively connected to the time synchronization server 3, and the time synchronization server 3 and the switch 4 are wired communicatively connected. The time server 5, the power distribution terminal 6, the computer 7, and the pointer type clock 8 are all connected to the switch 4.
[0028] The time synchronization server 3 in this embodiment is a Beidou NTP network time server, and the pointer type clock 8 is an xbd706 type pointer type clock. The time synchronization server uses the Beidou satellite signal as the standard time source. The time synchronization server is built-in with a satellite receiver, which can receive the satellite time signal, and then transmits the satellite signal to the terminal device through the network, and calibrates the time of the terminal device, so that the time of the terminal device in the local area network is synchronized with that of the Beidou time calibration server device, achieving the consistency between the terminal device and the satellite time.
[0029] As Figure 2 shown in the figure, the power distribution terminal 6 includes a microprocessor 61 and a power metering module 65, an overcurrent protection module 66, a switch output module 67, a power supply module 68, a line loss module 69, a memory 610, a network interface module 611, a 4G / 5G wireless communication module 612, and a display module 613 that are electrically connected to the microprocessor 61. The input end of the power metering module 65 is connected to a signal conditioning module 64, the input end of the signal conditioning module 64 is connected to a voltage acquisition module 62 and a current acquisition module 63, and the output end of the current acquisition module 63 is also connected to the overcurrent protection module 66.
[0030] The switch output module 67 includes an opto-isolation chip and a relay group connected to the output end of the opto-isolation chip. The switch quantities output by the relay group are opening, closing, and locking signals.
[0031] The network interface module 611 is an Ethernet port, which is used to connect the power distribution terminal and the switch through the Ethernet port. The power distribution terminal receives the Beidou satellite time information to achieve time server timing for the power distribution terminal.
[0032] The microprocessor 61 is any one of a single-chip microcomputer, a DSP, or an ARM processor, which is used to implement functions such as signal monitoring, control, and timing of the power distribution terminal.
[0033] As Figure 6 shown in the figure, the signal conditioning module 64 includes a first-order RC filter circuit and an operational amplifier circuit connected to the output end of the first-order RC filter circuit. In the figure, R1 and C1 form a first-order RC filter circuit, and the operational amplifier chip U1 and the resistors connected to it form a signal amplification circuit. Figure 6The shown signal conditioning module 64 has two paths, which respectively condition the voltage and current signals collected by the voltage acquisition module and the current acquisition module.
[0034] As Figure 3 shown, it is the circuit schematic diagram of the current acquisition module. The current sampling module includes a current transformer and a bridge rectifier connected to the secondary of the current transformer. The output end of the bridge rectifier is connected to a filter capacitor C1, and the voltage V1 output by the filter capacitor C1 is the voltage signal reflecting the magnitude of the current.
[0035] As Figure 5 shown, the voltage sampling module includes a voltage transformer and an operational amplifier circuit connected to the output end of the voltage transformer. The operational amplifier circuit is based on the operational amplifier chip U1. The voltage transformer senses the voltage of the mains line at the input end of the watt-hour meter. In the figure, VOUT is the voltage detection output signal.
[0036] The electric energy metering module 65 is an ADE7755 electric energy metering chip. ADE7755 is a high-precision electric energy metering IC designed specifically for single-phase power distribution systems. It has advanced functions and can calculate the instantaneous active power and average active power based on the line voltage and current in real time, with an accuracy exceeding the requirements of the IEC61036 standard.
[0037] As Figure 4 shown, the overcurrent protection module 66 is a window comparison circuit based on an operational amplifier. The voltage signal V1 reflecting the magnitude of the current collected by the current acquisition module is input to one end of R1 and R2 in the figure. The operational amplifiers U3 and U4 form a window comparator. The non-inverting end of the operational amplifier U3 is the high range of the reference voltage assumed to be VH, and the inverting end of the operational amplifier U4 is the low range of the reference voltage assumed to be VL. Only when VL < V1 < VH, a high level is output. When V1 is too high or too low exceeding the VH and VL thresholds, a low level is output. At this time, a low level output to the single-chip microcomputer indicates overcurrent, and then the single-chip microcomputer controls the switch quantity output module to implement protection actions such as opening, closing, or locking.
[0038] The line loss module 69 is of the model F-PIC100. Line loss causes heat generation, which increases the conductor temperature, accelerates the aging of the insulating material and shortens the life of the insulating material. The equipment heating caused by line loss may cause a fire. Secondly, line loss will cause huge energy waste. The line loss module is used to measure and collect the electric energy loss on the transmission line and is mainly composed of a voltage sampling circuit, a current sampling circuit, a microcontroller, a data memory, and a calendar clock module.
[0039] The working principle of the present utility model is:
[0040] As Figure 1As shown in the figure, the Beidou NTP network time server receives Beidou satellite time information through a satellite antenna, transmits it to the time server through a coaxial cable. The time server synchronizes its own time by receiving satellite signals through an internal receiver, and then transmits it to the xbd706 type pointer sub-clock, power distribution terminal and other network terminal devices through the NTP network, so that the terminal power distribution equipment is synchronized with the time server. This time server can also provide time service to the serial port terminal device through serial port information and test the time server through a 1PPS synchronization pulse signal.
[0041] As Figure 2 shown in the figure, voltage and current signals on the power distribution line are collected through a voltage acquisition module and a current acquisition module. After signal processing by a signal conditioning module, the power is calculated through an electric energy metering module. The operating states of key parameters such as voltage, current, and power factor of the distribution network are monitored in real time, and the parameters are stored and displayed in real time. The data is transmitted to the monitoring center through a 4G or 5G wireless network. At the same time, this terminal has an overcurrent detection function and a line loss measurement function. When overcurrent occurs, protections such as opening, closing, and locking can be activated.
[0042] The above is the preferred implementation mode of the present utility model. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle described in the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.
Claims
1. An intelligent power distribution terminal timing system based on Beidou timing calibration, characterized in that, It includes Beidou GPS satellites, timing antennas, time synchronization servers, switches, time servers, power distribution terminals, computers, and pointer clocks. The Beidou GPS satellites are wirelessly communicatively connected to the timing antennas, the timing antennas are wire communicatively connected to the time synchronization servers, the time synchronization servers and the switches are wire communicatively connected, and the time servers, power distribution terminals, computers, and pointer clocks are all connected to the switch; The power distribution terminal includes a microprocessor and a power metering module, an overcurrent protection module, a digital output module, a power supply module, a line loss module, a memory, a network interface module, a 4G / 5G wireless communication module, and a display module that are electrically connected to the microprocessor. The input end of the power metering module is connected to a signal conditioning module, the input end of the signal conditioning module is connected to a voltage acquisition module and a current acquisition module, and the output end of the current acquisition module is also connected to the overcurrent protection module.
2. The intelligent power distribution terminal timing system based on Beidou timing calibration according to claim 1, wherein the time synchronization server is a Beidou NTP network time server.
3. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, characterized in that, The digital output module includes an opto-isolation chip and a relay group connected to the output end of the opto-isolation chip. The digital signals output by the relay group are opening, closing, and locking signals.
4. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, characterized in that The pointer clock is an xbd706 type pointer clock.
5. The intelligent power distribution terminal timing system based on Beidou timing calibration according to claim 1, wherein The network interface module is an Ethernet port.
6. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, characterized in that, The microprocessor is any one of a single-chip microcomputer, a DSP, or an ARM processor.
7. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, wherein The signal conditioning module includes a first-order RC filter circuit and an operational amplifier circuit connected to the output end of the first-order RC filter circuit.
8. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, characterized in that, The power metering module is an ADE7755 power metering chip.
9. The intelligent distribution terminal time service system based on Beidou timing calibration according to claim 1, wherein The overcurrent protection module is a window comparison circuit based on an operational amplifier.
10. The intelligent power distribution terminal time service system based on Beidou timing calibration according to claim 1, characterized in that, The model of the line loss module is F-PIC100.