Dual power supply redundant power-off alarm and positioning device for power transmission line

Abstract

The utility model relates to a power transmission line dual power supply redundancy power-off alarm and positioning device, including having installed on the high voltage live display device and change over switch of distribution cabinet, still including the voltage transformer installed on the distribution cabinet bus, and the voltage transformer is used for gathering to take voltage signal, and the high voltage live display device is integrated with audible -visual annunciator, and the inside of high voltage live display device is provided with intermediate relay module and remote communication module, and intermediate relay module is used for receiving the contact signal from live display device and carries out power amplification and isolation, the utility model takes voltage signal in the high voltage distribution cabinet bus voltage transformer, signal transmission reaches the high voltage incoming call display device with the function of live magnetic lock, when high voltage is live, auxiliary contact breaks, and when high voltage is powered off, auxiliary contact is connected, controls the suction of AC contactor, reaches the power failure of stone han line line, the buzzer alarm function.

Description

Technical Field

[0001] This utility model relates to the field of mine power supply technology, specifically to a dual-power redundant power failure alarm and location device for transmission lines. Background Technology

[0002] In mining operations, the demand for electricity is high, and the stability of the power supply is also crucial. Our company's 35kV substation is powered by a dual-circuit power supply system consisting of the Qianhan Line and the Shihan Line, with the Shihan Line serving as a backup power source. Since power supply is a vital foundation for ensuring the company's safe production, a power outage that is not detected and addressed promptly could lead to a catastrophic accident. Therefore, we propose a dual-power redundant power outage alarm and location device for transmission lines to solve the above problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a dual-power redundant power outage alarm and location device for transmission lines. While providing an alarm, it also facilitates fault location, solving the problem that if a power outage occurs and is not detected and dealt with in a timely manner, it may lead to a catastrophic accident.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dual-power redundant power failure alarm and positioning device for transmission lines, including a high-voltage live display device and a switching switch installed on the distribution cabinet, and a voltage transformer installed on the busbar of the distribution cabinet. The voltage transformer is used to collect voltage signals, and the high-voltage live display device integrates an audible and visual alarm. The high-voltage live display device is equipped with an intermediate relay module and a remote communication module. The intermediate relay module is used to receive contact signals from the live display device and amplify and isolate them to drive the audible and visual alarm. The remote communication module is used to upload the power failure signal to the dispatch center.

[0005] It should be noted that the high-voltage incoming call display device has an electromagnetic lock function to prevent accidental activation by personnel.

[0006] Furthermore, the voltage transformer draws power from the busbar of the distribution cabinet and outputs a standard secondary voltage signal. This signal is then connected to the input terminal of the high-voltage live display device to determine whether the line is in a live state and to serve as the basis for the operation of the internal circuit of the high-voltage live display device.

[0007] Furthermore, the high-voltage live display device is equipped with a set of passive contacts that close when the power is lost. These contacts are connected in series in the coil circuit of the intermediate relay module. When the high-voltage line is normally energized, the passive contacts are in the open state, and the intermediate relay module does not operate. When the high-voltage line is de-energized, the high-voltage live display device detects the disappearance of voltage, and its internal passive contacts automatically close, energizing the intermediate relay module and triggering the audible and visual alarm.

[0008] It should be noted that the high-voltage live display device is equipped with an LCD screen or LED indicator array to intuitively display the current line voltage status, alarm information, communication status and equipment self-test results, thereby improving the human-machine interaction experience.

[0009] Furthermore, the audible and visual alarm is directly controlled by the contacts of the intermediate relay module, and a reset button is provided on the intermediate relay module to reset the intermediate relay module.

[0010] Furthermore, it also includes several miniature wireless voltage sensors installed on high-voltage lines. The miniature wireless voltage sensors are respectively set at the incoming end of the distribution cabinet, the ring network cabinet of the substation in the middle section of the line, and the incoming side of the substation at the mine end. Each miniature wireless voltage sensor is used to collect voltage status information at its location in real time and transmit the data to the data center through a wireless communication network. The miniature wireless voltage sensors adopt non-contact inductive power collection.

[0011] Furthermore, the remote communication module integrates an industrial IoT gateway and a data logger. The industrial IoT gateway is used for remotely pushing alarm information, while the data logger is used to store power outage information.

[0012] Furthermore, the high-voltage live display device also includes an independent DC backup power supply module. The DC backup power supply module is connected to the power supply circuit of the intermediate relay module, the audible and visual alarm and the remote communication module. When the main power supply fails, the DC backup power supply module is automatically activated.

[0013] Furthermore, the device can be linked with the substation automatic transfer switch (BZT) system, and the "standby line undervoltage" signal can be input to the BZT device as one of the blocking conditions to prevent accidental closing when the standby line fails, thereby improving the safety of power supply switching.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The dual-power redundant power failure alarm and location device of this transmission line takes the voltage signal from the voltage transformer of the busbar of the high-voltage distribution cabinet of the Shihan line and transmits the signal to the high-voltage power display device with electromagnetic lock function. When the high voltage is energized, the auxiliary contact is open, and when the high voltage is de-energized, the auxiliary contact is closed, controlling the AC contactor to close, so as to achieve the function of buzzer alarm when the Shihan line is de-energized. 2. The dual-power redundant power failure alarm and location device of this transmission line detects the voltage at multiple points through miniature wireless voltage sensors, which facilitates the location of the faulty section during power failure and makes maintenance work easier. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the principle and structure of this utility model. Figure 2The diagram shown is a schematic representation of the overall structure of this utility model. Figure 3 The diagram shown is a schematic diagram of the workflow structure of Embodiment 1 of this utility model; Figure 4 The diagram shown is a schematic diagram of the workflow structure of Embodiment 2 of this utility model.

[0016] Explanation of reference numerals in the attached diagram: 1. High-voltage live display device; 2. Switch; 3. Voltage transformer; 4. Audible and visual alarm; 5. Intermediate relay module; 6. Remote communication module; 7. Miniature wireless voltage sensor; 8. DC backup power supply module. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 Please see Figures 1-3 The dual-power redundant power failure alarm and location device for transmission lines in this embodiment includes a high-voltage live display device 1 and a switching switch 2 installed on the distribution cabinet, and also includes a voltage transformer 3 installed on the busbar of the distribution cabinet. The voltage transformer 3 is used to collect voltage signals, and the high-voltage live display device 1 integrates an audible and visual alarm 4. The high-voltage live display device 1 is internally equipped with an intermediate relay module 5 and a remote communication module 6. The intermediate relay module 5 is used to receive contact signals from the live display device and amplify and isolate them to drive the audible and visual alarm 4. The remote communication module 6 is used to upload the power failure signal to the dispatch center.

[0019] In this embodiment, the voltage transformer 3 draws power from the busbar of the distribution cabinet and outputs a standard secondary voltage signal (usually 100V (line voltage) or 57.7V (phase voltage)). This signal is then connected to the input terminal of the high-voltage live display device 1 to determine whether the line is in a live state and to serve as the basis for the operation of the internal circuit of the high-voltage live display device 1.

[0020] It should be noted that the voltage transformer 3 should be equipped with a secondary-side fuse or miniature circuit breaker to prevent short-circuit faults from affecting the safety of the main system, and its output signal should be filtered to avoid electromagnetic interference causing misjudgment; at the same time, the high-voltage live display device 1 is equipped with a voltage threshold detection function, which only determines "loss of voltage" when the input voltage is lower than 70% of the rated value, effectively avoiding false alarms caused by instantaneous fluctuations.

[0021] Please see Figure 1 and Figure 3 In this embodiment, the high-voltage live display device 1 is equipped with a set of passive contacts that close when de-energized (i.e., open when energized, closed when de-energized). These contacts are connected in series in the coil circuit of the intermediate relay module 5. When the high-voltage line is normally energized, the passive contacts are in the open state, and the intermediate relay module 5 does not operate. When the high-voltage line is de-energized, the high-voltage live display device 1 detects the disappearance of voltage, and its internal passive contacts automatically close, energizing the intermediate relay module 5 and triggering the audible and visual alarm 4 to start. The audible and visual alarm 4 is directly controlled by the contacts of the intermediate relay module 5, and a reset button is provided on the intermediate relay module 5 to reset the intermediate relay module 5.

[0022] It should be noted that the intermediate relay module 5 uses a high-reliability electromagnetic relay and is designed with a self-holding circuit (self-locking loop). This ensures that once an alarm is triggered, it will not automatically de-alarm even if the voltage recovers briefly. On-duty personnel must confirm and manually reset the relay to prevent missed alarms or the mistaken belief that the fault has been eliminated. Furthermore, the audible and visual alarm 4 is explosion-proof, suitable for flammable and explosive environments such as coal mines. It emits a buzzer sound with a frequency of over 85dB and a high-intensity red flash, ensuring all-weather detection.

[0023] Please see Figure 1 and Figure 3 In this embodiment, the remote communication module 6 integrates an industrial IoT gateway and a data logger. The industrial IoT gateway is used for remotely pushing alarm information, while the data logger is used to store power outage information. The industrial IoT gateway supports Modbus RTU / TCP protocol conversion and pushes information such as the timestamp of the power outage event, line name, and duration to the dispatch center SCADA system, WeChat, or SMS platform via 4G public network or Ethernet. The data logger is used to store no less than 30 days of historical alarm records, supports local query and export, and facilitates accident tracing and operation analysis.

[0024] It should be noted that the remote communication module 6 has a heartbeat mechanism and a breakpoint resume function. It automatically caches data when the network is interrupted and retransmits it after the network is restored to ensure information integrity. It also supports remote parameter configuration and firmware upgrade (OTA) to improve operation and maintenance efficiency.

[0025] Please see Figure 1In this embodiment, the high-voltage live display device 1 also includes an independent DC backup power supply module 8. The DC backup power supply module 8 is connected to the power supply circuit of the intermediate relay module 5, the audible and visual alarm 4 and the remote communication module 6. When the main power supply fails, the DC backup power supply module 8 automatically starts and outputs a stable DC24V power supply to ensure that the alarm system can continue to work for no less than 30 minutes in the event of a power outage at the entire station.

[0026] It should be noted that the DC backup power module 8 uses sealed lead-acid batteries or lithium iron phosphate battery packs, and is equipped with intelligent charge and discharge management circuits to prevent overcharging and over-discharging from damaging the batteries; it also has a low power warning function, which can send a "battery low voltage" prompt through the remote communication module 6 to remind maintenance personnel to replace or charge the battery in time.

[0027] Example 2 This embodiment is an improvement upon Embodiment 1.

[0028] Please see Figures 1-4 In this embodiment, several miniature wireless voltage sensors 7 are also installed on the high-voltage line. The miniature wireless voltage sensors 7 are respectively set at the incoming end of the distribution cabinet (first end), the ring network cabinet of the substation in the middle section of the line (midpoint), and the incoming side of the mine substation (end). Each miniature wireless voltage sensor 7 is used to collect the voltage status information of its location in real time and transmit the data to the data center through the wireless communication network. The miniature wireless voltage sensor 7 adopts non-contact inductive power extraction (such as electromagnetic induction energy extraction), does not require an external power supply, is easy to install, and is particularly suitable for overhead lines or areas where wiring is difficult.

[0029] It should be noted that the miniature wireless voltage sensor 7 has a built-in high-precision ADC sampling chip and temperature compensation algorithm, which can accurately identify changes within the range of 0 to 120% of the rated voltage; its wireless communication method is preferably LoRa or NB-IoT, which has the characteristics of long distance, low power consumption and strong penetration, making it suitable for applications in complex terrains in mining areas; all nodes are synchronized using Beidou / GPS time synchronization or master station broadcast time synchronization to ensure accurate judgment of event sequence.

[0030] The working principle of the above embodiments is as follows: First, voltage transformer 3 continuously acquires the secondary voltage signal of the high-voltage line from the busbar of the distribution cabinet and sends it to the high-voltage live display device 1 for real-time monitoring and signal acquisition. The high-voltage live display device 1 has a built-in voltage comparison circuit to determine whether there is a valid voltage (set threshold ≥70%Un). If there is voltage, the passive contact remains open; if there is no voltage, the contact closes, thus determining the status. After the contact closes, the intermediate relay module 5 is energized and its contacts connect the power circuit of the audible and visual alarm 4, immediately activating the buzzer and flashing light to alert on-site personnel. The remote communication module 6 in the system simultaneously captures the power failure signal and pushes the alarm information to the dispatch center through the industrial IoT gateway. At the same time, the data logger saves information such as event time, type, and equipment number to form a traceable log. Even if the entire station loses power, the DC backup power module 8 can still maintain the operation of critical modules for at least 30 minutes, ensuring continuous alarm operation under extreme conditions. Secondly, multiple miniature wireless voltage sensors 7 are distributed in different sections of the transmission line, uploading the voltage status of their respective locations in real time. The backend system compares the data from each node to determine which section experienced the power outage. Finally, after confirming that the issue has been resolved, the system presses the reset button on the intermediate relay module 5, and the system returns to normal monitoring status.

[0031] It should be noted that this utility model is controlled by a controller, and the control circuit of the controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the field. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-power redundant power failure alarm and location device for transmission lines, comprising a high-voltage live display device (1) and a switching switch (2) installed on a distribution cabinet, characterized in that: It also includes a voltage transformer (3) installed on the busbar of the distribution cabinet. The voltage transformer (3) is used to collect voltage signals, and the high voltage live display device (1) integrates an audible and visual alarm (4). The high-voltage live display device (1) is equipped with an intermediate relay module (5) and a remote communication module (6). The intermediate relay module (5) is used to receive the contact signal from the live display device and amplify and isolate the power, thereby driving the sound and light alarm (4). The remote communication module (6) is used to upload the power failure signal to the dispatch center.

2. The power transmission line dual-power redundant power failure alarm and location device according to claim 1, characterized in that: The voltage transformer (3) draws power from the busbar of the distribution cabinet and outputs a standard secondary voltage signal. After the signal is led out, it is connected to the input terminal of the high voltage live display device (1) to determine whether the line is in a live state and to serve as the basis for the operation of the internal circuit of the high voltage live display device (1).

3. The dual-power redundant power failure alarm and location device for transmission lines according to claim 1, characterized in that: The high-voltage live display device (1) is equipped with a set of power-off closed passive contacts. These contacts are connected in series in the coil circuit of the intermediate relay module (5). When the high-voltage line is normally energized, the passive contacts are in the open state and the intermediate relay module (5) does not operate. When the high-voltage line is de-energized, the high-voltage live display device (1) detects the voltage disappearance and its internal passive contacts automatically close, so that the intermediate relay module (5) is energized and activated, thereby triggering the sound and light alarm (4) to start.

4. The power transmission line dual-power redundant power failure alarm and location device according to claim 1, characterized in that: The sound and light alarm (4) is directly controlled by the contacts of the intermediate relay module (5), and the intermediate relay module (5) is equipped with a reset button to reset the intermediate relay module (5).

5. The transmission line dual-power redundant power failure alarm and location device according to any one of claims 1-4, characterized in that: It also includes several miniature wireless voltage sensors (7) installed on high-voltage lines. The miniature wireless voltage sensors (7) are respectively set at the incoming end of the distribution cabinet, the ring network cabinet of the substation in the middle section of the line and the incoming side of the substation at the mine end. Each miniature wireless voltage sensor (7) is used to collect the voltage status information of its location in real time and transmit the data to the data center through the wireless communication network. The miniature wireless voltage sensor (7) adopts non-contact inductive power collection.

6. The power transmission line dual-power redundant power failure alarm and location device according to claim 1, characterized in that: The remote communication module (6) integrates an industrial IoT gateway and a data logger. The industrial IoT gateway is used for remote push of alarm information, while the data logger is used to store power outage information.

7. The dual-power redundant power failure alarm and location device for transmission lines according to claim 1, characterized in that: The high-voltage live display device (1) also includes an independent DC backup power supply module (8). The DC backup power supply module (8) is connected to the power supply circuit of the intermediate relay module (5), the audible and visual alarm (4) and the remote communication module (6). When the main power supply fails, the DC backup power supply module (8) is automatically put into operation.

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