Intelligent ring main unit

Abstract

The utility model relates to power equipment, in particular to an intelligent ring main unit, which comprises a circuit breaker energy storage spring, an opening spring, an opening and closing coil, an energy storage motor, a first pressure sensor, a second pressure sensor, a Hall sensor and a data processing unit, the first pressure sensor and the second pressure sensor are respectively connected with the circuit breaker energy storage spring and the opening spring; the first pressure sensor collects pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit, and the second pressure sensor collects pressure information of the opening spring and transmits the pressure information to the data processing unit. The Hall sensor collects action current information of the opening and closing coil and the energy storage motor and transmits the action current information to the data processing unit. According to the utility model, faults can be timely found in the early stage so as to be timely removed, power supply continuity is ensured, and fault positions can be accurately determined.

Description

Technical Field

[0001] This utility model relates to a power equipment, and more particularly to an intelligent ring main unit. Background Technology

[0002] Ring main units (RMMs) play a crucial role in the operation of current power systems, and their stable operation is essential for the reliability of the entire power supply network. However, existing RMMs have revealed numerous problems in practical use. On the one hand, potential equipment malfunctions are often difficult to detect in a timely manner, typically only becoming apparent after the fault has already affected the power supply. This significantly reduces the continuity of power supply and increases the cost and inconvenience of power outage repairs. On the other hand, even when equipment anomalies are detected, accurately determining the cause of the fault is extremely cumbersome, requiring maintenance personnel to rely on experience and spend a significant amount of time troubleshooting. This is not only inefficient but also prone to misjudgment due to the limitations of human judgment, further delaying the repair process and impacting power supply. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an intelligent ring main unit that can detect faults in their early stages so as to eliminate faults in a timely manner and ensure the continuity of power supply, and can accurately determine the location of faults.

[0004] To address the aforementioned technical problems, this application provides the following technical solution:

[0005] This utility model discloses an intelligent ring main unit, including a circuit breaker energy storage spring, a tripping spring, a tripping and closing coil, and an energy storage motor. It also includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. The first and second pressure sensors are respectively connected to the circuit breaker energy storage spring and the tripping spring. The Hall sensor is connected to the tripping and closing coil and the energy storage motor. The first pressure sensor collects pressure information from the circuit breaker energy storage spring and transmits it to the data processing unit. The second pressure sensor collects pressure information from the tripping spring and transmits it to the data processing unit. The Hall sensor collects operating current information from the tripping and closing coil and the energy storage motor and transmits it to the data processing unit. The data processing unit monitors the pressure information of the circuit breaker energy storage spring, the pressure information of the tripping spring, and the operating current information.

[0006] Furthermore, it also includes an outlet bushing and an outlet bushing temperature sensor. The outlet bushing temperature sensor is connected to the outlet bushing, and the outlet bushing temperature sensor collects the temperature information of the outlet bushing and transmits the temperature information to the data processing unit.

[0007] Furthermore, it also includes a partial discharge sensor, which is placed near the weak point of the insulation of the intelligent ring main unit. The partial discharge sensor collects the partial discharge information of the weak point and transmits the partial discharge information to the data processing unit.

[0008] Furthermore, it also includes a circuit breaker spindle and an angular displacement sensor, wherein the angular displacement sensor collects the angle information of the circuit breaker spindle and transmits the angle information to the data processing unit.

[0009] Furthermore, it also includes an outgoing bushing and a current transformer. The current transformer is located close to the outgoing bushing, and the current transformer collects the current information in the outgoing bushing and transmits the current information to the data processing unit.

[0010] Furthermore, it also includes a gas box and an electronic density relay, wherein the electronic density relay is disposed inside the gas box and is used to measure the pressure information inside the gas box and transmit the pressure information to the data processing unit.

[0011] Furthermore, it also includes a cable housing, a temperature and humidity sensor, a temperature and humidity controller, a temperature regulating device, and a humidity regulating device. The temperature and humidity sensor is installed inside the cable housing and is used to collect temperature and humidity information inside the cable housing and transmit the temperature and humidity information to the temperature and humidity controller. The temperature and humidity controller controls the start and stop of the temperature regulating device and the humidity regulating device according to the temperature and humidity information.

[0012] Furthermore, it also includes a tilt sensor, which is installed on the outer wall of the ring main unit. The tilt sensor collects the attitude information of the ring main unit and transmits the attitude information to the data processing unit. When the attitude information exceeds the standard, the data processing unit issues a warning.

[0013] Furthermore, it also includes a first door control sensor, a second door control sensor, an instrument room door, and an outer enclosure. The intelligent ring network cabinet is equipped with an instrument room door, and the intelligent ring network cabinet is installed inside the outer enclosure. The first door control sensor is connected to the instrument room door, and the second door control sensor is connected to the outer enclosure. The first door control sensor collects instrument room door information and transmits it to the data processing unit, and the second door control sensor collects outer enclosure door information and transmits it to the data processing unit.

[0014] Compared with the prior art, the intelligent ring main unit of this utility model has at least the following beneficial effects:

[0015] This utility model of intelligent ring main unit includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. When the circuit breaker's energy storage spring fails to store enough energy, or when the spring ages, or when the opening spring ages or malfunctions, the information collected by the first pressure sensor, the second pressure sensor, and the Hall sensor can be detected in a timely manner. This avoids waiting until the fault becomes obvious and has already affected the power supply before the problem is discovered, ensuring the continuity of power supply, reducing the cost and inconvenience of power outage maintenance, accurately determining the location of the fault, shortening the fault diagnosis time, improving the accuracy and efficiency of fault diagnosis, and avoiding misjudgments.

[0016] The intelligent ring main unit of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the intelligent ring main unit of this utility model. Detailed Implementation

[0018] like Figure 1As shown, this utility model discloses an intelligent ring main unit, including a circuit breaker energy storage spring, a tripping spring, a tripping and closing coil 12, an energy storage motor, a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. The first pressure sensor and the second pressure sensor are respectively connected to the circuit breaker energy storage spring and the tripping spring. The Hall sensor is connected to the tripping and closing coil 12 and the energy storage motor. The first pressure sensor collects the pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit. The second pressure sensor collects the pressure information of the tripping spring and transmits the pressure information to the data processing unit. The Hall sensor collects the operating current information of the tripping and closing coil 12 and the energy storage motor and transmits the operating current information to the data processing unit. The data processing unit monitors the pressure information of the circuit breaker's energy storage spring collected by the first pressure sensor. This allows it to know in advance whether the energy storage spring is fully charged and whether the spring is aging, preventing opening and closing failures due to spring problems. The data processing unit also monitors the pressure information of the opening spring collected by the second pressure sensor, which helps to determine the timeliness and effectiveness of the opening action. The operating current information of the opening and closing coil 12 and the energy storage motor collected by the Hall sensor is the operating current information of the intelligent ring main unit. Changes in the operating current reflect the working status of key components. The data processing unit monitors the operating current information. When abnormal fluctuations occur in the operating current information, it indicates that there may be problems such as coil short circuit, open circuit, or motor stall or short circuit, so that timely measures can be taken. The data processing unit integrates the pressure information of the circuit breaker's energy storage spring and opening spring, as well as the operating current information of the opening and closing coil and the energy storage motor, to determine whether the circuit breaker's opening and closing action is smooth, timely, and accurate, and whether there are problems such as jamming or wear in the mechanical parts. This comprehensively assesses whether the mechanical characteristics of the intelligent ring main unit are normal. Specifically, the data processing unit pre-collects data on the operation of the circuit breaker mechanism of the intelligent ring main unit. It collects 10,000 data points from different samples of the same model, including normal operation and mechanism malfunctions. It summarizes the normal ranges of opening and closing speeds, opening and closing currents, energy storage currents, circuit breaker energy storage spring pressure, and opening spring pressure during circuit breaker operation, as well as the ranges of various measured values ​​under abnormal conditions, such as the stall current range when the motor is stalled and the operating current range of the opening and closing coils when the mechanism is jammed. This data is then aggregated and organized using algorithms to automatically generate a targeted data model. Based on the data model and information collected in real-time by sensors, the data processing unit performs comprehensive and dynamic monitoring of the ring main unit. If the real-time sensor measurements are all within the normal range during operation, the intelligent ring main unit is considered to be operating normally. When the real-time sensor measurements exceed the standard during operation, the model is compared to predict the cause of the malfunction.This utility model of intelligent ring main unit includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. When the circuit breaker's energy storage spring fails to store enough energy, or when the spring ages, or when the opening spring ages or malfunctions, the information collected by the first pressure sensor, the second pressure sensor, and the Hall sensor can be detected in a timely manner. This avoids waiting until the fault becomes obvious and has already affected the power supply before the problem is discovered, ensuring the continuity of power supply, reducing the cost and inconvenience of power outage maintenance, accurately determining the location of the fault, shortening the fault diagnosis time, improving the accuracy and efficiency of fault diagnosis, and avoiding misjudgments.

[0019] Optionally, the intelligent ring main unit of this utility model also includes an outgoing bushing 13 and an outgoing bushing temperature sensor. The outgoing bushing temperature sensor is connected to the outgoing bushing 13 and collects the temperature information of the outgoing bushing 13 and transmits the temperature information to the data processing unit. Specifically, the outgoing bushing temperature sensor is a passive wireless temperature sensor. When there is poor contact or overload at the cable head, the temperature will rise first. The data processing unit collects a large amount of operating data, such as the outgoing bushing temperature, of ring main units of the same model, and generates a targeted data model. The data processing unit monitors the outgoing bushing temperature of the ring main unit based on the data model and the temperature information of the outgoing bushing 13. By monitoring the temperature information measured by the outgoing bushing temperature sensor through the data processing unit, a timely warning is issued when the temperature exceeds the normal threshold to prevent serious accidents such as fires caused by overheating.

[0020] Optionally, this utility model of an intelligent ring main unit also includes a partial discharge (PD) sensor. The PD sensor is placed near the weak point of the insulation of the intelligent ring main unit. The PD sensor collects the PD information of the weak point and transmits the PD information to the data processing unit. Specifically, the weak points of the insulation of the intelligent ring main unit include bushings, cable interfaces 14, etc. The PD sensor is magnetically fixed to the side wall of the cable compartment. Partial discharge is an important indicator of insulation performance degradation. By monitoring the PD signal of the ring main unit collected by the PD sensor through the data processing unit, and performing spectrum analysis and amplitude comparison on the collected PD signal, PD anomalies can be detected early, allowing time for early maintenance and replacement of insulation components, and ensuring the insulation safety of the ring main unit.

[0021] Optionally, the intelligent ring main unit of this utility model also includes a circuit breaker main shaft 15 and an angular displacement sensor. The angular displacement sensor collects the angle information of the circuit breaker main shaft 15 and transmits the angle information to the data processing unit. The data processing unit combines the operating time of the circuit breaker opening and closing coils and the circuit breaker opening and closing position information to draw the mechanism action curve. By monitoring each opening and closing action process through the angle information of the circuit breaker main shaft 15 collected by the angular displacement sensor, problems and hidden dangers of the mechanism can be detected in time to ensure operational safety. Specifically, the angular displacement sensor is fixed on the circuit breaker main shaft 15. When the switch opens or closes, the circuit breaker main shaft 15 rotates, and the angular displacement sensor collects the rotation data. Combined with the cam size, the displacement data of the opening and closing action process can be calculated.

[0022] Optionally, the intelligent ring main unit of this utility model also includes a current transformer 16. The current transformer 16 is located close to the outgoing bushing 13. The current transformer 16 collects the current information in the outgoing bushing 13 and transmits the current information to the data processing unit. The current information collected by the current transformer 16 in the outgoing bushing 13 is the normal operating current of the intelligent ring main unit, i.e., the main circuit current. The data processing unit can monitor the load status of the line in real time through the current information collected by the current transformer 16 in the outgoing bushing 13. The vacuum bulb's interruption current will cause erosion of the contacts. By combining big data models, the number of opening and closing cycles, and the current information in the outgoing bushing 13, the data processing unit can predict the electrical life of the vacuum bulb, providing a scientific basis for preventive maintenance of the equipment, rationally arranging equipment maintenance and replacement plans, reducing operation and maintenance costs, and improving power supply reliability.

[0023] Optionally, this intelligent ring main unit also includes an air tank 17 and an electronic density relay. The electronic density relay is installed inside the air tank 17 and is used to measure the pressure information inside the air tank 17 and transmit the pressure information to the data processing unit. Specifically, the electronic density relay is installed on the upper left front of the air tank 17. A stop valve is provided on the air tank 17, through which the air tank is filled with air. When no pressure gauge is installed, it can ensure that the air tank does not leak. The stability of the pressure inside the air tank is crucial for the insulation performance of the ring main unit and the normal operation of the equipment. The data processing unit combines the pressure information inside the air tank 17, the ambient temperature, and other information with the normal operating pressure curve. When the pressure drop rate inside the air tank 17 is too fast or falls below the set threshold, it is determined that there is a leak in the air tank, and the leak area is located, which facilitates maintenance personnel to quickly find the fault point and allows sufficient processing time.

[0024] Optionally, this intelligent ring main unit also includes a cable compartment, a temperature and humidity sensor, a temperature and humidity controller, a temperature regulating device, and a humidity regulating device. The temperature and humidity sensor is installed inside the cable compartment and is used to collect temperature and humidity information within the cable compartment and transmit this information to the temperature and humidity controller. The temperature and humidity controller controls the start and stop of the temperature and humidity regulating devices based on the temperature and humidity information. Specifically, the temperature and humidity controller is installed on the instrument panel of the ring main unit. It uses the temperature and humidity sensor to collect environmental information within the ring main unit, providing a basis for data judgment by the temperature and humidity controller. The temperature and humidity controller can automatically control the start and stop of environmental control equipment such as heaters, dehumidifiers, and fans according to the temperature and humidity conditions.

[0025] Optionally, the intelligent ring main unit of this utility model also includes a tilt sensor. The tilt sensor is installed on the outer wall of the ring main unit. The tilt sensor collects the attitude information of the ring main unit and transmits the attitude information to the data processing unit. When the attitude information exceeds the standard, the data processing unit issues an alarm, prompting the operation and maintenance personnel to check the foundation, surrounding environment, etc., eliminate safety hazards, and prevent the ring main unit from tilting due to foundation settlement, external collision, etc., so as to avoid the ring main unit being tilted too much during transportation and use, which could damage the connection lines of the internal equipment and cause failure.

[0026] Optionally, the intelligent ring main unit of this utility model further includes a first door control sensor, a second door control sensor, an instrument room door 18, and an outer enclosure. The intelligent ring main unit is equipped with an instrument room door 18 and is housed within the outer enclosure. The first door control sensor is connected to the instrument room door, and the second door control sensor is connected to the outer enclosure. The first door control sensor collects information about the instrument room door and transmits it to the data processing unit, and the second door control sensor collects information about the outer enclosure door and transmits it to the data processing unit. The data processing unit determines whether the instrument room door and the outer enclosure door are properly closed based on the information about the instrument room door and the outer enclosure door. This prevents rainwater, insects, rodents, and other foreign objects from entering due to improperly closed instrument room door or outer enclosure door, which could affect the normal operation of the equipment. It also prevents unauthorized opening and ensures equipment safety.

[0027] The monitoring method for the intelligent ring main unit of this utility model includes the following steps:

[0028] The data processing unit pre-collects data from multiple intelligent ring main units of the same model but different samples during circuit breaker operation, including data under normal operating conditions and data under fault conditions. It summarizes the normal ranges of opening and closing speeds, opening and closing currents, energy storage currents, circuit breaker energy storage spring pressure, and opening spring pressure during circuit breaker operation, as well as the ranges of various measured values ​​under abnormal conditions, such as the stall current range when the motor is stalled and the operating current range of the opening and closing coils when the mechanism is jammed. This data is then aggregated and organized using algorithms to automatically generate a targeted data model. Based on the data model and information collected by sensors in real time, the data processing unit performs comprehensive and dynamic monitoring of the ring main unit. If the real-time sensor measurements are all within the normal range during operation, the intelligent ring main unit is considered to be operating normally. When the real-time sensor measurements exceed the limits during operation, the data is compared with the fault model to predict the cause of the fault. In this embodiment, the data processing unit collects 10,000 data points from different models and samples to form the data model.

[0029] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An intelligent ring main unit, comprising a circuit breaker energy storage spring, a tripping spring, a tripping and closing coil (12), and an energy storage motor, characterized in that, It also includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. The first pressure sensor and the second pressure sensor are respectively connected to the circuit breaker energy storage spring and the opening spring. The Hall sensor is connected to the opening and closing coil (12) and the energy storage motor. The first pressure sensor collects the pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit. The second pressure sensor collects the pressure information of the opening spring and transmits the pressure information to the data processing unit. The Hall sensor collects the operating current information of the opening and closing coil (12) and the energy storage motor and transmits the operating current information to the data processing unit. The data processing unit monitors the pressure information of the circuit breaker energy storage spring, the pressure information of the opening spring, and the operating current information.

2. The intelligent ring main unit according to claim 1, characterized in that, It also includes a cable outlet sleeve (13) and a cable outlet sleeve temperature sensor. The cable outlet sleeve temperature sensor is connected to the cable outlet sleeve (13). The cable outlet sleeve temperature sensor collects the temperature information of the cable outlet sleeve (13) and transmits the temperature information to the data processing unit.

3. The intelligent ring main unit according to claim 2, characterized in that, It also includes a partial discharge sensor, which is placed near the weak point of the insulation of the intelligent ring main unit. The partial discharge sensor collects the partial discharge information of the weak point and transmits the partial discharge information to the data processing unit.

4. The intelligent ring main unit according to claim 3, characterized in that, It also includes a circuit breaker spindle (15) and an angular displacement sensor, wherein the angular displacement sensor collects the angle information of the circuit breaker spindle (15) and transmits the angle information to the data processing unit.

5. The intelligent ring main unit according to claim 4, characterized in that, It also includes a current transformer (16), which is located close to the outgoing bushing (13). The current transformer (16) collects the current information in the outgoing bushing (13) and transmits the current information to the data processing unit.

6. The intelligent ring main unit according to claim 5, characterized in that, It also includes an air box (17) and an electronic density relay. The electronic density relay is installed inside the air box (17) and is used to measure the pressure information inside the air box (17) and transmit the pressure information to the data processing unit.

7. The intelligent ring main unit according to claim 6, characterized in that, It also includes a cable housing, a temperature and humidity sensor, a temperature and humidity controller, a temperature regulating device, and a humidity regulating device. The temperature and humidity sensor is installed inside the cable housing and is used to collect temperature and humidity information inside the cable housing and transmit the temperature and humidity information to the temperature and humidity controller. The temperature and humidity controller controls the start and stop of the temperature regulating device and the humidity regulating device according to the temperature and humidity information.

8. The intelligent ring main unit according to claim 7, characterized in that, It also includes a tilt sensor, which is installed on the outer wall of the ring main unit. The tilt sensor collects the attitude information of the ring main unit and transmits the attitude information to the data processing unit. When the attitude information exceeds the standard, the data processing unit issues a warning.

9. The intelligent ring main unit according to claim 8, characterized in that, It also includes a first door control sensor, a second door control sensor, an instrument room door (18), and an outer enclosure. The intelligent ring network cabinet is equipped with an instrument room door (18) and is located inside the outer enclosure. The first door control sensor is connected to the instrument room door (18), and the second door control sensor is connected to the outer enclosure. The first door control sensor collects instrument room door information and transmits it to the data processing unit, and the second door control sensor collects outer enclosure door information and transmits it to the data processing unit.

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