Monitoring system for looped network type box-type substation

Abstract

The invention discloses a monitoring system for a looped network type box-type substation, which comprises a sensor module and a man-machine interaction terminal, and the sensor module is connected with the man-machine interaction terminal through a signal. A performance enhancing structure for improving the monitoring precision and reliability of the looped network type box-type substation is arranged between the sensor module and the man-machine interaction terminal; the performance enhancement structure comprises an edge computing structure used for processing digital signals transmitted by the sensor module and a cloud monitoring structure used for carrying out fault diagnosis on the digital signals processed by the edge computing structure. By means of the mode, the monitoring system for the looped network type box-type substation is provided with a performance enhancing structure, the monitoring precision and reliability of the looped network type box-type substation can be improved, the system performance and response speed are effectively improved, and the increasing real-time data processing requirement is met.

Description

Technical Field

[0001] The present invention relates to the field of power equipment monitoring, and in particular to a monitoring system for a ring network box-type substation. Background Art

[0002] A box-type substation is a compact, modular substation equipment, usually used for power distribution and conversion. Its design purpose is to integrate the functions of the substation into a relatively small closed box for easy installation, maintenance and operation. In order to ensure the safe and reliable operation of the box-type substation, real-time monitoring is required through a monitoring system. The monitoring system can not only improve the safety and reliability of the equipment, but also improve the operation and maintenance efficiency, reduce the failure rate, and thus ensure the stable operation of the power system.

[0003] The existing box-type substation monitoring system has the following defects:

[0004] 1. Single monitoring dimension: Traditional solutions only monitor temperature or current parameters and cannot capture multi-physics coupling effects such as vibration and partial discharge.

[0005] 2. Unreliable data transmission: The packet loss rate of a single communication method in an electromagnetic interference environment is greater than 15%;

[0006] 3. Long response delay: Cloud-based centralized processing causes fault alarm delays of ≥500ms;

[0007] 4. Lack of predictive capabilities: Unable to provide 24-hour advance warning of equipment anomalies, resulting in unplanned power outages. Summary of the Invention

[0008] The main technical problem solved by the present invention is to provide a monitoring system for a ring network box-type substation, which can improve the monitoring accuracy and reliability of the ring network box-type substation.

[0009] To solve the above technical problems, the present invention adopts a technical solution: providing a monitoring system for a ring network type box-type substation, comprising a sensor module and a human-machine interaction terminal, wherein the sensor module and the human-machine interaction terminal are connected via a signal, and a performance enhancement structure for improving the monitoring accuracy and reliability of the ring network type box-type substation is provided between the sensor module and the human-machine interaction terminal;

[0010] The performance enhancement structure includes an edge computing structure for processing the digital signal transmitted from the sensor module and a cloud monitoring structure for performing fault diagnosis on the digital signal processed by the edge computing structure;

[0011] The edge computing structure and the cloud detection structure are connected via a communication module.

[0012] In a preferred embodiment of the present invention, the sensor module includes a distributed optical fiber temperature sensor, a three-dimensional vibration sensor, an ultrasonic partial discharge sensor, a humidity sensor and a power quality analyzer. The distributed optical fiber temperature sensor is laid in a serpentine shape along the surface of the busbar and is connected to the optical signal demodulator in the edge computing structure through a fiber optic fusion box. The three-dimensional vibration sensor is installed at the four corners of the box-type substation casing and is connected to the FPGA chip in the edge computing structure through a signal conditioning circuit.

[0013] In a preferred embodiment of the present invention, the distributed optical fiber temperature sensor uses armored anti-interference optical fiber, and the optical fiber is laid along the bus duct in a spiral winding manner, with the spacing between adjacent windings being ≤5 cm.

[0014] In a preferred embodiment of the present invention, a processor and a data cache unit are further provided in the edge computing structure, and the processor, the FPGA core and the data cache unit are connected to the sensor module via a CAN bus.

[0015] In a preferred embodiment of the present invention, the communication module adopts a dual-channel dynamic routing selection strategy, including a wireless unit and an industrial Ethernet unit, and automatically switches to the industrial Ethernet for full-duplex transmission when the wireless signal strength is less than -85dBm.

[0016] In a preferred embodiment of the present invention, the cloud-based monitoring structure is provided with a fault diagnosis model library and an equipment health assessment algorithm, and the communication module is connected to the cloud-based monitoring structure via a gateway.

[0017] The beneficial effects of the present invention are: the present invention provides a monitoring system for a ring network type box-type substation, which has a performance enhancement structure, can improve the monitoring accuracy and reliability of the ring network type box-type substation, effectively improve the system performance and response speed, and meet the growing real-time data processing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The following is a logical connection diagram of a monitoring system for a ring network box-type substation.

[0019] The components in the figure are marked as follows: 1. Sensor module; 2. Edge computing structure; 3. Communication module; 4. Cloud monitoring structure; 5. Human-computer interaction terminal; 6. Fiber optic fusion box; 7. Signal conditioning circuit. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0021] according to Figure 1 A monitoring system for a ring network box-type substation includes a sensor module 1 and a human-computer interaction terminal 5. The sensor module 1 is connected to the human-computer interaction terminal 5 through a signal. A performance enhancement structure for improving the monitoring accuracy and reliability of the ring network box-type substation is provided between the sensor module 1 and the human-computer interaction terminal 5. The performance enhancement structure can improve the monitoring accuracy and reliability of the ring network box-type substation, effectively improve the system performance and response speed, and meet the growing demand for real-time data processing.

[0022] The performance enhancement structure includes an edge computing structure 2 for processing the digital signal transmitted from the sensor module 1 and a cloud monitoring structure 4 for performing fault diagnosis on the digital signal processed by the edge computing structure 2. The edge computing structure 2 and the cloud detection structure are connected via a communication module 3.

[0023] The sensor module 1 includes a distributed optical fiber temperature sensor, a three-dimensional vibration sensor, an ultrasonic partial discharge sensor, a humidity sensor and a power quality analyzer. The distributed optical fiber temperature sensor is laid in a serpentine manner along the surface of the busbar. The distributed optical fiber temperature sensor uses armored anti-interference optical fiber. The optical fiber is laid in a spiral winding manner along the busbar trough, and the distance between adjacent windings is ≤5cm.

[0024] The distributed optical fiber temperature sensor is connected to the optical signal demodulator in the edge computing structure 2 through the optical fiber fusion box 6. The distributed optical fiber temperature sensor is used to realize millimeter-level temperature monitoring of the entire length of the busbar. The distributed optical fiber temperature sensor monitors the temperature field distribution of the busbar with an accuracy of 0.1°C. The collected data is converted into a digital signal by the optical signal demodulator and then transmitted to the edge computing structure 2. The laying length of each phase of the busbar is ≥3m.

[0025] The distributed optical fiber sensor monitors the abnormal temperature point of the busbar in real time and triggers an alarm when the temperature is greater than 90°C.

[0026] The three-dimensional vibration sensor is installed at the four corners of the box-type substation casing and is connected to the FPGA chip in the edge computing structure 2 through the signal conditioning circuit 7. The three-dimensional vibration sensor is used to capture vibration signals of abnormal mechanical status of the equipment.

[0027] The FPGA chip performs fast Fourier transform on the vibration signal collected by the three-dimensional vibration sensor to extract characteristic values of the 10-1000 Hz frequency band.

[0028] The edge computing structure 2 is also provided with a processor and a data cache unit. The processor, the FPGA core and the data cache unit are connected to the sensor module 1 via a CAN bus.

[0029] The edge computing structure 2 can complete 85% of data processing and shorten the response time to ≤100ms;

[0030] The edge computing structure 2 has a built-in adaptive filtering algorithm to perform nonlinear noise suppression on the vibration signal collected by the three-dimensional vibration sensor, and the signal-to-noise ratio is improved by ≥20dB.

[0031] The processor uses the ARM Cortex-A72 processor, which is a high-performance, low-power processor core launched by ARM. It belongs to the ARM Cortex-A series and is mainly designed for applications such as smartphones, tablets, embedded devices and high-performance computing. As the successor to the Cortex-A57, it provides higher performance and energy efficiency and is suitable for scenarios that require powerful computing power and good battery life.

[0032] The communication module 3 adopts a dual-channel dynamic routing selection strategy and ensures a data integrity rate of ≥99.9% through dual-channel dynamic switching.

[0033] It supports Modbus-TCP and IEC 61850 protocol conversion and includes a wireless unit and an industrial Ethernet unit. The wireless unit adopts the LoRa wireless unit. The LoRa wireless unit is a low-power wide area network technology mainly used for long-distance wireless communication, especially suitable for Internet of Things applications. Due to its low power consumption, long-distance transmission and wide coverage, it has become an ideal choice for many wireless sensor networks and smart city projects.

[0034] When the wireless signal strength is less than -85dBm, it automatically switches to industrial Ethernet for full-duplex transmission.

[0035] The communication module 3 dynamically selects a transmission channel according to the network status, and key alarm data is uploaded preferentially through the LoRa wireless unit.

[0036] The cloud monitoring structure 4 is provided with a fault diagnosis model library and an equipment health assessment algorithm. The communication module 3 is connected to the cloud monitoring structure 4 via a gateway, and generates maintenance suggestions through fault diagnosis and health assessment and pushes them to the human-computer interaction terminal 5.

[0037] The cloud monitoring structure 4 integrates an LSTM neural network model, which can predict the temperature change trend of the equipment within the next 72 hours with an error rate of ≤2%.

[0038] The LSTM neural network model is a special type of recurrent neural network designed to address the vanishing or exploding gradient problems often encountered by traditional RNNs when processing long sequence data. The LSTM neural network model effectively captures long-range dependencies in sequence data by introducing cell states and gating mechanisms, enabling it to perform well in time series prediction, natural language processing, and other sequence data processing tasks. As a powerful sequence modeling tool, it has been widely used in many fields. By introducing cell states and gating mechanisms, it successfully addresses the challenges encountered by traditional RNNs when processing long sequences. Although the LSTM neural network model has the disadvantages of computational complexity and long training time, its advantages make it still one of the preferred models for processing time series data.

[0039] The human-computer interaction terminal 5 includes a touch screen, an audible and visual alarm, and a status indicator light. The touch screen is also equipped with a self-checking module, which automatically performs sensor zero point calibration and communication link integrity detection at 0:00 every day.

[0040] Compared with the existing technology, the present invention provides a monitoring system for a ring network box-type substation. The monitoring system has a performance enhancement structure, which can improve the monitoring accuracy and reliability of the ring network box-type substation, effectively improve the system performance and response speed, and meet the growing real-time data processing needs.

[0041] In the description of the present invention, it should be noted that the components are all universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional test methods. The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0042] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A monitoring system for a ring network box-type substation, comprising a sensor module and a human-computer interaction terminal, wherein the sensor module is connected to the human-computer interaction terminal via a signal, characterized in that: A performance enhancement structure for improving the monitoring accuracy and reliability of the ring network box-type substation is provided between the sensor module and the human-machine interaction terminal; The performance enhancement structure includes an edge computing structure for processing the digital signal transmitted from the sensor module and a cloud monitoring structure for performing fault diagnosis on the digital signal processed by the edge computing structure; The edge computing structure and the cloud detection structure are connected via a communication module.

2. A monitoring system for a ring network box-type substation according to claim 1, characterized in that: The sensor module includes a distributed optical fiber temperature sensor, a three-dimensional vibration sensor, an ultrasonic partial discharge sensor, a humidity sensor and a power quality analyzer. The distributed optical fiber temperature sensor is laid in a serpentine shape along the surface of the busbar and is connected to the optical signal demodulator in the edge computing structure through a fiber optic fusion box. The three-dimensional vibration sensor is installed at the four corners of the box-type substation casing and is connected to the FPGA chip in the edge computing structure through a signal conditioning circuit.

3. A monitoring system for a ring network box-type substation according to claim 2, characterized in that: The distributed optical fiber temperature sensor adopts armored anti-interference optical fiber, and the optical fiber is laid along the bus duct in a spiral winding manner, with the spacing between adjacent windings being ≤5cm.

4. A monitoring system for a ring network box-type substation according to claim 2, characterized in that: The edge computing structure is also provided with a processor and a data cache unit. The processor, the FPGA core and the data cache unit are connected to the sensor module via a CAN bus.

5. A monitoring system for a ring network box-type substation according to claim 1, characterized in that: The communication module adopts a dual-channel dynamic routing selection strategy, including a wireless unit and an industrial Ethernet unit. When the wireless signal strength is less than -85dBm, it automatically switches to the industrial Ethernet for full-duplex transmission.

6. A monitoring system for a ring network box-type substation according to claim 5, characterized in that: The cloud-based monitoring structure is provided with a fault diagnosis model library and an equipment health evaluation algorithm, and the communication module is connected to the cloud-based monitoring structure via a gateway.

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