Substation inspection system

Abstract

The utility model discloses a substation inspection system, which belongs to the technical field of substation operation and maintenance equipment, and is characterized in that a node detection module is arranged at an electrical cabinet end, the node detection module can acquire internal voltage and current data of an electrical cabinet, and an inspection movement mechanism drives an inspection module to move; the node detection module is internally provided with a first LoRa module, the inspection module is internally provided with a second LoRa module, the node detection module performs data transmission with the inspection module through a wireless communication network constructed by the LoRa module, and the inspection module is internally provided with a GPRS module capable of communicating with a cloud platform. The substation inspection system is innovatively provided, the system uses the power sensor module to collect current and voltage data of key equipment in real time, wireless transmission is carried out through the LoRa module, and the inspection module moves continuously, so that the flexibility and range of data collection are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substation operation and maintenance equipment, in particular to a transformer substation inspection system. Background Art

[0002] Substation inspection is an important part of ensuring the reliable operation of the power grid and the safety of power supply. There are a large number of electrical equipment in the substation. Regular inspections can help identify the operating status of these equipment and detect abnormal conditions in a timely manner. The current inspection is to check whether the voltage and current parameters inside each electrical cabinet are abnormal. Voltage and current parameters are a very important precursor to equipment failure. Therefore, the current substation inspection monitoring of the voltage and current of the electrical cabinet is a very important part of the inspection.

[0003] In modern substation operations and maintenance, traditional inspection and monitoring rely primarily on manual labor. This is not only inefficient but also presents significant safety risks and monitoring blind spots. Manual inspections often take a long time to complete, fail to provide continuous monitoring, and can lead to unstable monitoring quality due to human factors. Furthermore, the complex substation environment places higher demands on real-time monitoring of equipment status and fault prevention, making traditional methods unable to meet the requirements for efficient and accurate monitoring.

[0004] With the popularization of the power Internet of Things, many electrical cabinets will be installed with acquisition terminal equipment to collect voltage and current data in real time, and then upload it to the background monitoring system through the bus. Although the wired monitoring system can achieve a certain degree of automated monitoring, its scalability and flexibility are limited, because each acquisition terminal must upload data to the communication management machine. If more acquisition terminals are added, the corresponding communication management machine must also be configured accordingly. In addition, for large substations, when there are many internal electrical cabinets, the data that needs to be transmitted is also large, and it is difficult for the wired detection system to achieve full coverage.

[0005] To address the above issues, the industry urgently needs a new patrol system that can achieve high efficiency and wide coverage, and a technical solution that can dynamically monitor the voltage and current status of electrical cabinets in real time while reducing operation and maintenance costs. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0007] The object of the present invention is to provide a substation inspection system to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A substation inspection system includes a node detection module, an inspection module, and an inspection motion mechanism, wherein:

[0010] The node detection module includes a power sensor module, which is electrically connected to the secondary sides of the current transformer and the voltage transformer of the electrical cabinet inside the substation, and is used to collect the secondary side voltage data and current data of the voltage transformer and the current transformer inside the electrical cabinet;

[0011] The power sensor module is electrically connected to the first controller, the first controller is used to receive voltage data and current data, the first controller is electrically connected to the first LoRa module, the first LoRa module is used to build a wireless communication network, and send the voltage data and current data received by the first controller to the inspection module;

[0012] The inspection module includes a second LoRa module and an environmental sensor module. The second LoRa module is electrically connected to the second controller for receiving voltage data and current data sent by the first LoRa module through the wireless communication network and sending the data to the second controller. The environmental sensor module is electrically connected to the second controller for collecting temperature and humidity data of the environment in which the inspection module is located and sending the data to the second controller. The second controller is electrically connected to the GPRS module, and the GPRS module is used to build a GPRS network. The second controller sends the received voltage data, current data, temperature and humidity data to the cloud platform through the GPRS network.

[0013] The inspection module is installed in the inspection motion mechanism, and the inspection motion mechanism is used to drive the inspection module to move.

[0014] Furthermore, the power sensor module includes a current sensor and a voltage sensor, the primary side of the current sensor is electrically connected to the secondary side of the current transformer, the secondary side of the current sensor is electrically connected to the first controller, the secondary side of the voltage sensor is electrically connected to the first controller, and the primary side is electrically connected to the secondary side of the voltage transformer.

[0015] Furthermore, the node detection module also includes a power supply module, the input end of the power supply module is electrically connected to the AC bus inside the electrical cabinet, and the output end is electrically connected to the first controller, which is used to rectify AC power into DC power to power the operation of the first controller.

[0016] Furthermore, the inspection module also includes a battery module, which is electrically connected to the second controller and is used to provide power for the operation of the second controller.

[0017] Furthermore, the environmental sensor module includes a temperature sensor and a humidity sensor, which are electrically connected to the second controller respectively, and are used to collect temperature and humidity data of the environment in which the inspection module is located, and send them to the second controller.

[0018] Furthermore, the inspection motion mechanism includes a slide rail, a bearing seat, a bracket, a bearing seat, a pulley, a driven gear, a driving gear, a T-type gear box and a motor. The number of the pulleys is four, and the four pulleys are symmetrically arranged on both sides of the slide rail. The bottom end of the bracket is fixedly connected to the top of the bearing seat. The motor and the T-type gear box are installed on the inner wall of the bearing seat through a fixing frame. The output shaft of the motor is fixedly connected to the input end of the T-type gear box. The two output ends of the T-type gear box are fixedly connected to the driving gear. The bearing seat is connected to the top of the bearing seat. The driven gear is rotatably connected to the bearing seat through a bearing. The driven gear and the driving gear are connected by a chain transmission. Two of the pulleys are symmetrically arranged and rotatably connected to the bracket, and the other two pulleys are symmetrically arranged and fixedly connected to the driven gear through a connecting rod.

[0019] Furthermore, the environmental sensor module is fixed to the bottom of the supporting base, the GPRS module is fixed to the outside of the supporting base, the second LoRa module, the second controller and the battery module are fixed to the inside of the supporting base, and the motor and the battery module are electrically connected.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model deploys a node detection module at the end of the electrical cabinet. The node detection module can collect the internal voltage and current data of the electrical cabinet. The inspection motion mechanism drives the inspection module to move. The node detection module has a first LoRa module inside, and the inspection module has a second LoRa module inside. The node detection module transmits data to the inspection module through the wireless communication network built by the LoRa module. The inspection module also has a GPRS module that can communicate with the cloud platform. By combining LoRa wireless communication technology and GPRS network, the utility model innovatively proposes a substation inspection system. The system uses power sensor modules to collect current and voltage data of key equipment in real time and transmits wirelessly through LoRa modules. Since the inspection module is in constant motion, the flexibility and scope of data collection are greatly improved.

[0022] Essentially, this utility model constructs a star-shaped LoRa for data transmission through the second LoRa module and the first LoRa module. Instead of sending all data to the cloud platform, it dynamically receives and collects data as the inspection module moves. This can effectively reduce the amount of background data, reduce manpower dependence and operation and maintenance costs, and improve the flexibility and scalability of equipment deployment. It is suitable for complex and vast substation environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall system structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of the inspection motion mechanism of the present utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the inspection motion mechanism of the present utility model;

[0026] Figure 4 It is an enlarged structural diagram of the driven gear and the driving gear of the inspection motion mechanism of the utility model.

[0027] Description of the drawings: node detection module 100, power sensor module 110, first controller 120, first LoRa module 130, power supply module 140, inspection module 200, second LoRa module 210, environmental sensor module 220, second controller 230, GPRS module 240, battery module 250, inspection motion mechanism 300, slide rail 310, bearing seat 320, bracket 330, bearing seat 340, pulley 350, driven gear 360, driving gear 370, T-type gearbox 380, motor 390. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it designate an embodiment as being exclusive or mutually exclusive of other embodiments. The present invention provides the following embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0032] Example 1:

[0033] See also Figure 1-4 The present invention provides a substation inspection system, including a node detection module 100, an inspection module 200 and an inspection motion mechanism 300, wherein:

[0034] The node detection module 100 includes a power sensor module 110, which is electrically connected to the secondary sides of the current transformer and voltage transformer of the electrical cabinet inside the substation, and is used to collect secondary side voltage data and current data of the voltage transformer and current transformer inside the electrical cabinet.

[0035] The node detection module 100 is provided with multiple groups, each group is arranged inside a corresponding electrical cabinet to be inspected, and the power sensor module 110 includes a current sensor and a voltage sensor, the primary side of the current sensor is electrically connected to the secondary side of the current transformer, the secondary side of the current sensor is electrically connected to the first controller 120, the secondary side of the voltage sensor is electrically connected to the first controller 120, and the primary side is electrically connected to the secondary side of the voltage transformer.

[0036] Since the transformation ratio of the voltage transformer and the current transformer used in the existing substation is generally about 100:1, taking a 10KV substation as an example, the voltage after the voltage transformer is transformed is still about 57.7V, which is still too high for the microcomputer. Therefore, this embodiment uses a current sensor and a voltage sensor to further reduce the collected current and voltage, which is convenient for the first controller 120 to use. In this embodiment, the current sensor adopts an AC circuit transmitter of model JXB-10JX, and the secondary side output of the current transformer is The loop passes through the air of the current sensor, and the output end of the current transformer is connected to the first controller 120. The current sensor converts the current into a DC4-20mA analog output. The voltage sensor uses an AC voltage transmitter with model JXB-13VD. Its input end is electrically connected to the output end of the voltage transformer, and its output end is electrically connected to the first controller 120. The voltage sensor converts the voltage into a DC4-20mA analog output. If it is necessary to measure multi-phase voltage and current, a corresponding number of current sensors and voltage sensors are arranged accordingly.

[0037] The power sensor module 110 is electrically connected to the first controller 120, which is used to receive voltage data and current data. The first controller 120 is electrically connected to the first LoRa module 130, which is used to establish a wireless communication network and send the voltage data and current data received by the first controller 120 to the inspection module 200. In this embodiment, the first controller 120 is composed of an embedded development board based on the STM32F103RCT6 main control chip, which has three 12-bit ADCs inside that can convert analog signals into digital signals. The output ends of the current sensor and voltage sensor are both electrically connected to the serial port of the first controller 120. The first LoRa module 130 uses the ATK-LoRa-01 module of ALI ENTEK. The module has an onboard SX1278 chip, which is a powerful long-distance, low-power wireless communication chip that uses error correction and spread spectrum modulation technology to increase the coverage of the communication link.

[0038] The TXD and RXD ports of the first LoRa module 130 are respectively connected to the PA2 and PA3 ports of the first controller 120. The first LoRa module 130 communicates with the first controller 120 through the serial port, and the AUX and MD0 ports of the first LoRa module 130 are respectively connected to the PA11 and PA4 ports of the first controller 120.

[0039] Furthermore, the node detection module 100 also includes a power supply module 140, the input end of the power supply module 140 is electrically connected to the AC bus inside the electrical cabinet, and the output end is electrically connected to the first controller 120, for rectifying AC power into DC power to power the first controller 120. The power supply module 140 adopts a power supply module model PLB03A produced by Guangzhou Sanmin Electronics. The input end of the power supply module 140 directly draws power from the AC bus inside the electrical cabinet, and after voltage reduction, it is supplied to the first controller 120. If the first LoRa module 130 requires external power supply, it also draws power from the output end of the power supply module 140.

[0040] The inspection module 200 includes a second LoRa module 210 and an environmental sensor module 220. The second LoRa module 210 is electrically connected to the second controller 230 for receiving voltage data and current data sent by the first LoRa module 130 through the wireless communication network, and sending the data to the second controller 230. The second LoRa module 210 also adopts the ATK-LoRa-01 module of ALI ENTEK. The second controller is also composed of an embedded development board based on the STM32F103RCT6 main control chip. The TXD and RXD ports of the second LoRa module 210 are respectively connected to the PA2 and PA3 ports of the second controller 230. The second LoRa module 210 communicates with the second controller 230 through the serial port. The AUX and MD0 ports of the second LoRa module 210 are respectively connected to the PA11 and PA4 ports configured to the second controller 230.

[0041] The first LoRa module 130 and the second LoRa module 210 are configured on the same frequency or channel. The first controller 120 encodes the received voltage data and current data through the first LoRa module 130, converts the data into a wireless signal using LoRa modulation technology, and transmits it through the antenna. The transmitted signal is propagated through the air. Even in the presence of obstacles or in complex environments such as cities, it can be effectively transmitted due to the anti-interference ability of LoRa modulation technology. The second LoRa module 210 connected to the second controller 230 captures the signal through its antenna, demodulates the signal using a demodulator, restores the data, and sends it to the second controller 230.

[0042] The environmental sensor module 220 is electrically connected to the second controller 230, and is used to collect temperature and humidity data of the environment in which the inspection module 200 is located, and send the data to the second controller 230. The environmental sensor module 220 includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are electrically connected to the second controller 230, respectively, and are used to collect temperature and humidity data of the environment in which the inspection module 200 is located, and send the data to the second controller 230. The temperature sensor adopts a temperature sensor of model DS18B20, and the humidity sensor adopts a humidity acquisition device of model YL-69. The electrode part of the device is exposed to the air. The working principle of the sensor is to obtain the ambient humidity value by collecting air resistivity through the AD conversion circuit inside the second controller 230.

[0043] The second controller 230 is electrically connected to the GPRS module 240. The GPRS module 240 is used to build a GPRS network. The second controller 230 sends the received voltage data, current data, temperature and humidity data to the cloud platform through the GPRS network. The GPRS module 240 adopts a SIM800C module. The GPRS module 240 is embedded with the TCP / IP protocol. The frequencies include four categories: GSM850, PCS1900MHz, DCS1800 and EGSM900. The GPRS module 240 and the second controller 230 communicate through the UART serial port. It is only necessary to connect the STXD and SRXD of the module to the RXD and TXD ports of the second controller 230 respectively.

[0044] Through the GPRS module 240, the second controller 230 can conveniently communicate GPRS data with the cloud platform. The GPRS module 240 establishes a TCP / UDP link between the second controller 230 and the remote cloud platform, and the cloud platform receives the data sent by the second controller 23. The cloud platform can adopt a relatively simple one of Organic Smart Cloud, Yeelink and TLink.

[0045] Furthermore, the inspection module 200 also includes a battery module 250, which is electrically connected to the second controller 230 and is used to power the second controller 230. If the second LoRa module 210 requires external power supply, it also draws power from the battery module 250.

[0046] The inspection module 200 is installed in the inspection movement mechanism 300 , and the inspection movement mechanism 300 is used to drive the inspection module 200 to move.

[0047] Furthermore, the inspection motion mechanism 300 includes a slide rail 310, a bearing seat 320, a bracket 330, a bearing seat 340, a pulley 350, a driven gear 360, a driving gear 370, a T-type gear box 380 and a motor 390. The number of the pulleys 350 is four, and the four pulleys 350 are symmetrically arranged on both sides of the slide rail 310. The cross-section of the slide rail 310 is I-shaped, and the pulleys 350 are nested on both sides of the slide rail 310. The bottom end of the bracket 330 is fixedly connected to the top of the bearing seat 320. The bracket 330 is used to carry and install two of the pulleys 350. The motor 390 and the T-type gear box 380 are both installed on the inner side wall of the bearing seat 320 through a fixing frame. When the input end of the T-type gear box 380 rotates, it will drive the two driven output ends to rotate. The output shaft of the motor 390 is fixedly connected to the input end of the T-type gear box 380.

[0048] The two output ends of the T-type gearbox 380 are respectively fixedly connected to two symmetrically arranged driving gears 370. The bearing seat 340 is connected to the top of the bearing seat 320. The interior of the bearing seat 340 is hollow. The driven gear 360 is rotatably connected to the bearing seat 340 through a bearing. The driven gear 360 and the driving gear 370 are connected through a chain transmission. Two of the pulleys 350 are symmetrically arranged and rotatably connected to the bracket 330. The other two pulleys 350 are symmetrically arranged and fixedly connected to the driven gear 360 through a connecting rod. The connecting rod passes through the bearing seat 340 and is rotatably connected to the bearing seat 340. During operation, the motor 390 drives the input end of the T-type gear box 380 to rotate, and the output end of the transmission T-type gear box 380 rotates, so that the driving gear 370 rotates, and the driven gear 360 is driven to rotate through the chain, so that two of the pulleys 350 rotate, and the other two pulleys 350 rotate drivenly to assist the movement. The rotating pulleys 350 drag the entire supporting base 320 to translate on the slide rail 310.

[0049] The environmental sensor module 220 is fixed to the bottom of the supporting base 320, the GPRS module 240 is fixed to the outside of the supporting base 320, the second LoRa module 210, the second controller 230 and the battery module 250 are fixed to the inside of the supporting base 320, the motor 390 and the battery module 250 are electrically connected, and the battery module 250 is used to power the operation of the motor 390. The battery module 250 uses a rechargeable lithium battery.

[0050] In this embodiment, the inspection module 200 is able to move along the slide rail 310 by driving the motor 390 . The motor 390 is a DC motor with an operating voltage of 2-5.5V. The control chip is a driver chip of model L9110S.

[0051] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A substation inspection system, comprising a node detection module (100), an inspection module (200) and an inspection motion mechanism (300), characterized in that: The node detection module (100) includes a power sensor module (110), the power sensor module (110) being electrically connected to the secondary sides of the current transformer and the voltage transformer of the electrical cabinet inside the substation, and being used for collecting the secondary side voltage data and current data of the voltage transformer and the current transformer inside the electrical cabinet; The power sensor module (110) is electrically connected to the first controller (120), the first controller (120) is used to receive voltage data and current data, the first controller (120) is electrically connected to the first LoRa module (130), the first LoRa module (130) is used to build a wireless communication network, and sends the voltage data and current data received by the first controller (120) to the inspection module (200); The inspection module (200) comprises a second LoRa module (210) and an environmental sensor module (220); the second LoRa module (210) is electrically connected to a second controller (230) for receiving voltage data and current data sent by the first LoRa module (130) via a wireless communication network, and sending the data to the second controller (230); the environmental sensor module (220) is electrically connected to the second controller (230) for collecting temperature and humidity data of the environment in which the inspection module (200) is located, and sending the data to the second controller (230); the second controller (230) is electrically connected to a GPRS module (240); the GPRS module (240) is used to construct a GPRS network; the second controller (230) sends the received voltage data, current data, temperature and humidity data to a cloud platform via the GPRS network; The inspection module (200) is installed in an inspection motion mechanism (300), and the inspection motion mechanism (300) is used to drive the inspection module (200) to move.

2. A substation inspection system according to claim 1, characterized in that: The power sensor module (110) includes a current sensor and a voltage sensor, wherein the primary side of the current sensor is electrically connected to the secondary side of the current transformer, and the secondary side of the current sensor is electrically connected to the first controller (120); the secondary side of the voltage sensor is electrically connected to the first controller (120), and the primary side is electrically connected to the secondary side of the voltage transformer.

3. A substation inspection system according to claim 1, characterized in that: The node detection module (100) further includes a power supply module (140), wherein the input end of the power supply module (140) is electrically connected to the AC busbar inside the electrical cabinet, and the output end of the power supply module (140) is electrically connected to the first controller (120), and is used to rectify the AC power into DC power to provide power for the operation of the first controller (120).

4. A substation inspection system according to claim 1, characterized in that: The inspection module (200) further includes a battery module (250), and the battery module (250) is electrically connected to the second controller (230) and is used to provide power for the operation of the second controller (230).

5. A substation inspection system according to claim 4, characterized in that: The environmental sensor module (220) includes a temperature sensor and a humidity sensor, which are electrically connected to the second controller (230) and are respectively used to collect temperature and humidity data of the environment in which the inspection module (200) is located, and send the data to the second controller (230).

6. A substation inspection system according to claim 5, characterized in that: The inspection motion mechanism (300) includes a slide rail (310), a bearing seat (320), a bracket (330), a bearing seat (340), a pulley (350), a driven gear (360), a driving gear (370), a T-type gear box (380) and a motor (390). The number of the pulleys (350) is four, and the four pulleys (350) are symmetrically arranged on both sides of the slide rail (310). The bottom end of the bracket (330) is fixedly connected to the top of the bearing seat (320). The motor (390) and the T-type gear box (380) are installed on the inner side wall of the bearing seat (320) through a fixing frame. The motor (390) ) is fixedly connected to the input end of the T-type gearbox (380), both output ends of the T-type gearbox (380) are fixedly connected to the driving gear (370), the bearing seat (340) is communicated with the top of the bearing seat (320), the driven gear (360) is rotatably connected to the bearing seat (340) through a bearing, the driven gear (360) and the driving gear (370) are connected through a chain transmission, wherein two of the pulleys (350) are symmetrically arranged and rotatably connected to the bracket (330), and the other two pulleys (350) are symmetrically arranged and fixedly connected to the driven gear (360) through a connecting rod.

7. A substation inspection system according to claim 6, characterized in that: The environmental sensor module (220) is fixed to the bottom of the supporting base (320), the GPRS module (240) is fixed to the outside of the supporting base (320), the second LoRa module (210), the second controller (230) and the battery module (250) are fixed to the inside of the supporting base (320), and the motor (390) and the battery module 250 are electrically connected.

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