Substation secondary equipment monitoring device

Abstract

The embodiment of the utility model provides a substation secondary equipment monitoring device. The substation secondary equipment monitoring device comprises a standby power supply module; a dual-channel communication module; the signal isolator is used for isolating input and output signals to prevent electrical interference; the redundant sensor module comprises a plurality of sensor units and is used for monitoring the state of the secondary equipment of the transformer substation in real time; the change-over switch is used for automatically switching to the standby module when a fault of a certain sensor module or a communication channel is detected; wherein the standby power supply module is connected to the main power supply module through a cable, the dual-channel communication module is respectively connected to two different communication nodes through independent communication lines, the signal isolator is connected between an input signal line and an output signal line, and a plurality of sensor units in the redundant sensor module are connected in parallel to the change-over switch. Through the scheme of the embodiment of the invention, the problem of how to ensure the high availability of the system can be solved, and the failure of the whole system cannot be caused even if a single point of failure occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to power system automation, in particular to a substation secondary equipment monitoring device. BACKGROUND

[0002] The substation secondary equipment monitoring device is an important facility in the power system for monitoring and controlling the running state of various secondary equipment in the substation. Through real-time data acquisition and analysis, it can effectively guarantee the stable operation of the power grid and provide decision support for operation and maintenance personnel. Such devices play a key role in the process of power system automation and intelligentization. However, in order to ensure the high availability of the system, the challenge of single point failure must be faced, that is, it is necessary to ensure that the entire monitoring system can continue to work normally even in the case of failure of a component or node, avoiding global failure due to local problems. This means that the system design needs to fully consider fault tolerance and redundancy configuration and other factors to improve the overall reliability and stability. SUMMARY

[0003] Therefore, the embodiments of the present disclosure provide a substation secondary equipment monitoring device to at least partially solve the problems in the prior art.

[0004] The substation secondary equipment monitoring device of the present application comprises:

[0005] a backup power supply module for providing stable power supply when the main power supply fails;

[0006] a dual-channel communication module for realizing redundant data communication with external devices;

[0007] a signal isolator for isolating input and output signals to prevent electrical interference;

[0008] a redundant sensor module comprising a plurality of sensor units for real-time monitoring of the state of the substation secondary equipment;

[0009] a switching switch for automatically switching to a backup module when a sensor module or communication channel failure is detected;

[0010] wherein the backup power supply module is connected to the main power supply module through a cable, the dual-channel communication module is connected to two different communication nodes through independent communication lines, the signal isolator is connected between the input and output signal lines, and the plurality of sensor units in the redundant sensor module are connected in parallel to the switching switch; wherein

[0011] the plurality of sensor units in the redundant sensor module are connected to the switching switch through a pluggable interface;

[0012] Each sensor unit in the redundant sensor module is built-in with a fault self-checking circuit for real-time detection of the working state of the sensor unit; and

[0013] The switching switch further comprises a backup power supply interface connected with the backup power supply module when the main power supply module fails.

[0014] Preferably, the backup power supply module is installed below the main power supply module.

[0015] Preferably, the backup power supply module comprises a battery unit for immediate power supply when the main power supply fails and a voltage stabilizing circuit for stabilizing the output voltage.

[0016] Preferably, the dual-channel communication module comprises two groups of communication chips for realizing data transmission and an isolation transformer for reducing electromagnetic interference.

[0017] Preferably, the dual-channel communication module is connected to two different communication nodes through independent optical fiber links respectively.

[0018] Preferably, the signal isolator is installed on a fixed support between the input and output signal lines.

[0019] Preferably, the signal isolator comprises a plurality of signal coupling circuits for realizing efficient transmission of signals and photoelectric converters for further isolating the input and output signals.

[0020] Preferably, the switching switch comprises a plurality of relays for realizing physical switching and a microprocessor for controlling the switching logic.

[0021] Preferably, the switching switch is installed on one side of the redundant sensor module and is not more than 5 centimeters away from each sensor unit.

[0022] The embodiment of the present disclosure provides a substation secondary equipment monitoring device, comprising: a backup power supply module, used for providing stable power supply when the main power supply fails; a dual-channel communication module, used for realizing redundant data communication with external equipment; a signal isolator, used for isolating input and output signals to prevent electrical interference; a redundant sensor module, comprising a plurality of sensor units, used for monitoring the state of the substation secondary equipment in real time; a switching switch, used for automatically switching to a backup module when a certain sensor module or communication channel fails; wherein the backup power supply module is connected to the main power supply module through a cable, the dual-channel communication module is connected to two different communication nodes through independent communication lines, the signal isolator is connected between the input and output signal lines, and the plurality of sensor units in the redundant sensor module are connected to the switching switch in parallel; wherein the plurality of sensor units in the redundant sensor module are connected to the switching switch through a pluggable interface; each sensor unit in the redundant sensor module is internally provided with a fault self-checking circuit, the fault self-checking circuit is used for detecting the working state of the sensor unit in real time; and the switching switch further comprises a backup power supply interface, which is connected with the backup power supply module when the main power supply module fails. Through the scheme of the embodiment of the present disclosure, how to ensure the high availability of the system can be solved, and it is ensured that even if single-point failure occurs, the whole system will not fail. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the drawings, like reference numbers in the drawings and the same reference numbers throughout the several drawings indicate the same or similar elements or features. These drawings are not necessarily to scale. It should be understood that the drawings only depict some embodiments consistent with the disclosure and should not be considered limiting of the scope of the disclosure.

[0024] Figure 1 It is a secondary equipment monitoring device shaft side structure schematic view of the utility model;

[0025] Figure 2 It is a secondary equipment monitoring device shaft side structure schematic view of the utility model Figure 1 It is a main power supply module structure schematic view of the utility model;

[0026] Figure 3 It is a secondary equipment monitoring device shaft side structure schematic view of the utility model Figure 1 It is a backup power supply module structure schematic view of the utility model.

[0027] In the figure: 1, backup power supply module; 2, dual-channel communication module; 3, signal isolator; 4, redundant sensor module; 5, switching switch; 6, battery unit; 7, voltage stabilizing circuit; 8, communication chip; 9, isolation transformer; 10, signal coupling circuit; 11, photoelectric converter; 12, fault self-checking circuit; 13, relay; 14, microprocessor; 15, backup power supply interface DETAILED DESCRIPTION

[0028] It is to be understood that the terminology used herein such as first and second, and the like, is only used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0029] As shown in Figure 1 The substation secondary equipment monitoring device of the present application comprises a backup power module 1, a dual-channel communication module 2, a signal isolator 3, a redundant sensor module 4, and a switching switch 5.

[0030] The backup power module 1 is used to provide stable power supply in the event of failure of the main power supply. The module is connected with the main power module through a cable, and can immediately take over the power supply responsibility to ensure the stable operation of the entire device when the main power fails.

[0031] The dual-channel communication module 2 is responsible for realizing redundant data transmission with external devices. The module is composed of two independent and physically separated communication lines, each of which is connected to a different communication node. This arrangement ensures that the system can still maintain communication capability even if one channel fails.

[0032] In order to completely isolate the input and output signals and prevent possible electrical interference that may affect system performance, the signal isolator 3 is used in the monitoring device. It is connected between the input and output lines to form an effective barrier while ensuring the safety of information exchange.

[0033] As the main tool for state monitoring, the redundant sensor module 4 is composed of a number of sensor units connected in parallel to the switching switch 5. These sensor units are used to collect and analyze key data reflecting the condition of secondary equipment, and are connected to each other through plug-in interfaces required for convenient replacement and maintenance.

[0034] It is worth noting that each sensor unit is equipped with a fault self-checking circuit 12 designed to detect the health status of the components. It can continuously monitor the status of the respective components without human intervention and notify the maintenance team in a timely manner when potential problems are found.

[0035] For switching operation, it is handed over to the switching switch 5 with automatic judgment ability and fast response speed to complete, which is responsible for identifying and quickly transferring from the problem module or path to the normal alternative. To ensure that the power supply will not be disconnected during switching, the switch is specially provided with an energy port that can accept standby power supply in emergency. This port remains unpowered and dormant under normal conditions.

[0036] Based on the above scheme, the application aims to overcome the risk of overall collapse caused by accidental failure of any single element. By integrating backup facilities, enhancing communication stability, and strengthening the robustness and flexibility of data transmission, the multi-sensor collaborative work is assisted by intelligent self-diagnosis mechanism and automatic real-time emergency switching measures to ensure that the monitoring system can still reliably perform its duties. In summary, the substation secondary equipment monitoring device successfully realizes the effective improvement of single-point fault tolerance by using the above configuration and principle.

[0037] In one embodiment, as shown in Figure 2 The standby power supply module 1 of the substation secondary equipment monitoring device of the application is installed below the main power supply module. This position layout not only reasonably utilizes the space within the device, but also facilitates maintenance and replacement. Since the main power supply module is usually the main power source of the system, it is placed in a higher or main position within the device to ensure the stability and reliability of the system; and the standby power supply module 1 is installed below to realize the supplement and replacement of the main power supply without damaging the original circuit and affecting the normal operation of the system.

[0038] Specifically, the standby power supply module 1 usually includes a battery pack, a charge and discharge controller, and corresponding interfaces, etc. These components collectively constitute a complete small energy system. Through reasonable structural design, the standby power supply module 1 can be closely attached to the main power supply module and stably fixed in the designated position. At the same time, to ensure the safety and effectiveness of circuit connection, the connection between the two power supply modules adopts a short and straight design to avoid resistance loss or signal attenuation caused by excessive bending.

[0039] For example, the standby power supply module 1 can be firmly fixed on the base using metal buckles or bolts, and the base itself also has a certain elastic support ability to prevent position deviation or loosening caused by vibration or other external factors. The cable between the main power supply module and the standby power supply module 1 is wrapped with waterproof and corrosion-resistant material, and reliable crimping process is used at the key contact points to ensure stable data exchange and power supply even in harsh environmental conditions.

[0040] In one embodiment, as shown in Figure 3As shown, the standby power module 1 of the substation secondary equipment monitoring device of the present application includes a battery unit 6 and a voltage stabilizing circuit 7. Among them, the battery unit 6 is used to provide continuous and uninterrupted power supply for the entire monitoring device immediately when the main power fails, so as to ensure the normal operation of the system in the case of accidental power failure. Specifically, when the main power is interrupted due to some reason, the built-in battery unit 6 can immediately take over the power supply task and keep the continuous work of each functional module. The main function of the voltage stabilizing circuit 7 is to stabilize the output voltage, so that even in the case of voltage fluctuation or instability, other electrical components can still receive constant and adaptive power supply, thereby maintaining the working stability and reliability of the device.

[0041] For example, the battery unit 6 is usually located inside the monitoring device and is directly connected with the voltage stabilizing circuit 7 through wires. The selection of the battery needs to be configured according to the actual use requirements to meet the capacity requirements. In order to realize this feature, the battery unit 6 is first installed near the chassis of the device, and is fixed by a fixed bracket to ensure its position stable and immovable, and the connection between the device internal circuit board should be simple and reliable. The voltage stabilizing circuit 7 is designed as an independent unit and is placed near the outgoing terminal, so as to directly process and adjust the voltage signal output from the battery unit 6, and realize the required stable voltage output by adjusting the circuit parameters. In this configuration, the entire standby power module 1 forms a coordinated and efficient working whole.

[0042] Referring back to Figure 1 and Figure 2 In one embodiment, the dual-channel communication module 2 of the substation secondary equipment monitoring device of the present application includes two groups of communication chips 8 and an isolation transformer 9. The communication module is mainly used to realize efficient transmission of data and effectively reduce electromagnetic interference. In the specific structural design, two groups of communication chips 8 are respectively installed in the communication module to ensure that each chip can independently and reliably perform data receiving and transmitting tasks. The isolation transformer 9 is placed in the signal path between the communication chips 8 and plays an important role in electromagnetic isolation. The isolation transformer 9 is connected with the communication chips 8 through a dedicated circuit board, so that the transformer can greatly reduce the adverse effects of external electromagnetic signals on the data transmission process without reducing the transmission efficiency.

[0043] The core component of the dual-channel communication module 2 is the communication chip 8, which is selected to have high bandwidth and low error rate characteristics, and can work stably in a complex substation environment. For example, each group of communication chips 8 is connected with the corresponding communication interface, which is used to process the data received from external devices, and then transmitted to the isolation transformer 9 through the circuit board for electromagnetic isolation. Specifically, in one embodiment, these components collectively form the main part of the dual-channel communication system. The communication chip 8 is located at the front end of the dual-channel communication module 2, which is used to preliminarily process and forward the data signals from the internal monitoring device or other external devices; and the isolation transformer 9 follows immediately behind, which is directly placed on the key node of data transmission, responsible for further optimizing the signal quality and ensuring the stability of communication through effective shielding measures. Such a layout not only simplifies the structural complexity of the entire system, but also ensures that the data transmission between the two channels does not interfere with each other.

[0044] In one embodiment, the dual-channel communication module 2 of the substation secondary equipment monitoring device of the present application is connected to two different communication nodes through independent optical fiber links. Specifically, in order to ensure the reliability and redundancy of communication, the dual-channel communication module 2 is designed to use two non-interfering optical fiber links for data transmission. This design ensures that even if one of the links fails, the other link can still work normally, thereby improving the stability and reliability of the system.

[0045] In addition, the dual-channel communication module 2 is installed on the main control board of the monitoring device, located in the core area of the entire device, to ensure its good cooperation with the processing unit and other key components. The main components of the module include the optical fiber interface unit, the signal conversion circuit and the controller. Among them, the optical fiber interface unit is responsible for physical connection and data transmission; the signal conversion circuit is used to convert between optical signals and electrical signals; and the controller is responsible for controlling and coordinating the entire communication process, ensuring the accuracy and real-time of data.

[0046] In one embodiment, the specific technical implementation is as follows: for example, one end of the dual-channel communication module 2 is connected with the first communication node through an optical fiber joint, and the other end is connected with the second communication node through a different optical fiber joint. These two optical fiber links are independently laid and isolated from each other to avoid cross interference. In addition, the communication nodes can be different substations inside the substation or external monitoring centers, and the specific selection depends on the system configuration requirements. In order to ensure the efficiency and reliability of communication, the optical fiber joint needs to have dustproof and waterproof function, and high-quality optical fiber materials are used to reduce signal attenuation. In addition, the link configuration between the dual-channel communication module 2 and each communication node can be set and optimized through dedicated configuration management software.

[0047] In one embodiment, the signal isolator 3 of the substation secondary equipment monitoring device of the present application is fixed on a specially designed bracket, which is located between the input and output signal lines. Such a layout enables the signal isolator 3 to effectively isolate the input signal from the output signal, thereby avoiding signal interference and other electrical performance problems. Through this design, the electrical safety and stable operation of each circuit can be ensured even in a high electromagnetic compatibility (EMC) environment. In order to achieve this, the fixing bracket not only needs to provide stable physical support, but also needs to have good insulation performance.

[0048] In addition, the installation position of the bracket must ensure that all relevant connections are convenient to make, and do not hinder the maintenance and operation of other components. For this reason, in the actual installation process, the selection of the bracket should take into account the specific structure and environmental conditions of the substation to adapt to different types and sizes of cable arrangements. Further, the bracket should also have a certain adjustability, allowing its relative position or angle to be adjusted according to different situations, so that the installation of the signal isolator 3 achieves the best effect.

[0049] For example, in a specific implementation case, a bracket made of high-strength plastic or insulating metal material can be selected, and mechanical interfaces such as threaded holes are integrated into it to fix the signal isolator 3. At the same time, during installation, fasteners and elastic washers are used to firmly install the entire assembly in the pre-set position, ensuring that the signal isolator 3 can work reliably under the expected working conditions.

[0050] In one embodiment, the signal isolator 3 of the substation secondary equipment monitoring device of the present application includes multiple signal coupling circuits 10 and photoelectric converters 11. The signal coupling circuits 10 are used to achieve efficient and stable signal transmission between substation secondary equipment, ensuring the normal operation of the monitoring device. These circuit structures, through precise design, can work stably in complex electromagnetic environments, improving system reliability. The photoelectric converters 11 further enhance the signal isolation capability, ensuring complete electrical isolation between the input and output signals, preventing the negative effects of electromagnetic interference on the monitoring system.

[0051] Specifically, the signal isolation part of the monitoring device integrates advanced microelectronic technology, combining traditional signal processing methods with optoelectronic devices, thereby improving the isolation effect and anti-interference capability. The multi-stage coupling circuit can effectively enhance weak signals and maintain their integrity and accuracy, ensuring smooth transmission of information between devices at all levels in the substation. At the same time, using photoelectric conversion technology, the input electrical signal can be converted into an optical signal and transmitted to the destination through an independent optical fiber channel and then restored to an electrical signal, achieving complete isolation at the physical level.

[0052] For example, the coupling circuit installed inside the substation secondary equipment is composed of multiple high-speed operational amplifiers, connected to the input port of the central processor, receiving and processing electrical signals from various devices. The optoelectronic transducer 11 is installed between the signal input and output ports as the key node for converting electrical signals to optical signals. Under this arrangement, each communication link is equipped with a separate coupling circuit unit and optoelectronic conversion device, forming a solid protective barrier.

[0053] In one embodiment, the switching switch 5 of the substation secondary equipment monitoring device of the present application includes multiple relays 13 and a microprocessor 14. The switching switch 5 in the device is one of the key components of the entire system, responsible for physical switching and logical control of the circuit in different operating modes. Specifically, the relays 13 are used to perform actual physical switching operations. The relays 13 are installed near the main control module inside the device to quickly respond to control instructions and operate the electrical circuit. At the same time, the microprocessor 14, as the core control element of the switching switch 5, is placed in the same control unit near the relays 13. They are connected by electrical signals to ensure efficient coordination. This structural design enables the device to provide reliable operation in a complex electrical environment. The design of the switching switch 5 fully considers the safety and stability of the device, ensuring that each component can work efficiently and cooperatively through reasonable layout and connection.

[0054] For example, during the switching process, the microprocessor 14 sends instruction signals to the relays 13 according to pre-programmed logical judgment conditions, and the relays 13 perform corresponding physical switching actions after receiving the instructions. For example, when switching from the main line to the backup line is required, the microprocessor 14 detects the main line fault signal, then determines the optimal switching time through internal algorithms, and immediately sends instructions to the relays 13. In this way, the circuit switching is completed in the shortest time, ensuring the continuity and reliability of the power supply system.

[0055] In one embodiment, the switching switch 5 of the substation secondary equipment monitoring device of the present application is installed on one side of the redundant sensor module 4, and the distance between the switching switch 5 and each sensor unit does not exceed 5 cm. This installation layout ensures that the switching switch 5 can quickly and stably respond to signals from different sensor units, improving the overall reliability and efficiency of the system. The switching switch 5, as part of the redundant sensor module 4, its position is optimized based on the relative positions of the sensors in the actual operating environment and the spatial limitations. Therefore, the close distance between the switching switch 5 and each sensor unit helps to reduce the delay or interference that may occur during signal transmission.

[0056] Specifically, the redundant sensor module 4 generally includes a plurality of independently operating sensor units that can monitor different physical quantities, such as temperature, humidity, voltage, or current parameters. In order to achieve comprehensive monitoring of these parameters, the installation position of the switch 5 is particularly selected to be close to each sensor unit. In this way, not only can the response speed of the entire system be improved, but the coordinated work between each sensor can also be effectively guaranteed, so that the monitoring device still has efficient data acquisition and processing capabilities in complex and variable working environments.

[0057] For example, the switch 5 can be connected to each sensor unit in the redundant sensor module 4 through a short cable. The length of the cable is controlled within 5 centimeters to ensure the shortest path connection, thereby minimizing signal transmission delay and other external factor interference. For example, in a specific installation process, a customized fixed bracket can be used to securely install the switch 5 at a designated position of the redundant sensor module 4, and a shielded cable is used for wiring to ensure good electromagnetic compatibility and electrical isolation performance.

[0058] In actual operation, when the device is in use, the standby power module 1 can provide stable power supply when the main power fails. The dual-channel communication module 2 can achieve redundant data communication with external equipment, ensuring that even if one communication channel fails, the other channel can still maintain normal communication. The signal isolator 3 isolates the input and output signals to prevent electrical interference from affecting data transmission. The plurality of sensor units in the redundant sensor module 4 are connected in parallel to the switch 5 for real-time monitoring of the status of the substation secondary equipment. The fault self-checking circuit 12 built into each sensor unit can detect the working state of the sensor unit in real time. If the sensor module or communication channel fails, the switch 5 will automatically switch the working mode to the standby module to ensure stable operation of the system. When the main power module fails, the standby power interface 15 will be connected to the standby power module 1 to continuously provide power support for the system. Through this series of designs, the monitoring device can maintain reliable operation performance in complex power environments.

[0059] The above specific embodiments further illustrate the purpose, technical solutions, and beneficial effects of the disclosed embodiments. It should be understood that the above description is only a specific embodiment of the disclosed embodiments and is not intended to limit the protection scope of the disclosed embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the disclosed embodiments should be included in the protection scope of the disclosed embodiments.

Claims

1. A substation secondary equipment monitoring device, characterized by, The application relates to a power supply system for a substation secondary device, comprising: a backup power module (1) for providing stable power supply when the main power supply fails; a dual-channel communication module (2) for realizing redundant data communication with external equipment; a signal isolator (3) for isolating input and output signals to prevent electrical interference; a redundant sensor module (4) comprising a plurality of sensor units for monitoring the state of the substation secondary device in real time; a switching switch (5) for automatically switching to the backup module when a certain sensor module or communication channel fails; wherein the backup power module (1) is connected to the main power module through a cable, the dual-channel communication module (2) is connected to two different communication nodes through independent communication lines, the signal isolator (3) is connected between the input and output signal lines, and the plurality of sensor units in the redundant sensor module (4) are connected in parallel to the switching switch (5); wherein the plurality of sensor units in the redundant sensor module (4) are connected to the switching switch (5) through a pluggable interface; each sensor unit in the redundant sensor module (4) is internally provided with a fault self-checking circuit (12) for detecting the working state of the sensor unit in real time; and the switching switch (5) further comprises a backup power supply interface (15) connected to the backup power module (1) when the main power module fails.

2. The substation secondary equipment monitoring device of claim 1, wherein: The backup power module (1) is installed below the main power module.

3. The substation secondary equipment monitoring device of claim 1, wherein: The backup power module (1) comprises a battery unit (6) for providing power immediately when the main power supply fails and a voltage stabilizing circuit (7) for stabilizing the output voltage.

4. The substation secondary equipment monitoring device of claim 1, wherein: The dual-channel communication module (2) comprises two groups of communication chips (8) for realizing data transmission and an isolation transformer (9) for reducing electromagnetic interference.

5. The substation secondary equipment monitoring device of claim 1, wherein: The dual-channel communication module (2) is connected to two different communication nodes through independent optical fiber links.

6. The substation secondary equipment monitoring device of claim 1, wherein: The signal isolator (3) is installed on a fixed support between the input and output signal lines.

7. The substation secondary equipment monitoring device of claim 1, wherein: The signal isolator (3) comprises a plurality of signal coupling circuits (10) for realizing efficient signal transmission and photoelectric converters (11) for further isolating the input and output signals.

8. The substation secondary equipment monitoring device of claim 1, wherein: The switching switch (5) comprises a plurality of relays (13) for realizing physical switching and a microprocessor (14) for controlling the switching logic.

9. The substation secondary equipment monitoring device of claim 1, wherein: The switching switch (5) is installed on one side of the redundant sensor module (4) and is not more than 5 cm away from each sensor unit.

Images