Intelligent ring main unit and monitoring method of intelligent ring main unit

Abstract

The invention 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 invention, 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 judged.

Description

Technical Field

[0001] The invention relates to electric power equipment, in particular to an intelligent ring main unit and a monitoring method of the intelligent ring main unit. Background Art

[0002] In the current operation of the power system, the ring main unit plays a vital role, and its stable operation is related to the reliability of the entire power supply network. However, the existing ring main units have exposed many problems in actual use. On the one hand, when there is a hidden fault in the equipment, it is often difficult to be discovered in time. Usually, it is not known until the fault is obvious and has affected the power supply, which greatly reduces the continuity of the power supply and increases the cost and inconvenience of power outage maintenance. On the other hand, even if an abnormality is found in the equipment, it is very cumbersome to accurately determine the cause of the fault. The operation and maintenance personnel need to rely on experience and spend a lot of time to investigate. Not only is it inefficient, but also due to the limitations of human judgment, misjudgment may occur, further delaying the maintenance process and affecting the power supply. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intelligent ring main unit and a monitoring method for the intelligent ring main unit which can detect faults in time at the early stage so as to eliminate the faults in time and ensure the continuity of power supply, and can accurately determine the fault location.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The present invention provides an intelligent ring network cabinet, comprising a circuit breaker energy storage spring, an opening spring, an opening and closing coil, an energy storage motor, and also comprising 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 and the energy storage motor, the first pressure sensor collects pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit, the second pressure sensor collects pressure information of the opening spring and transmits the pressure information to the data processing unit, and 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.

[0006] Furthermore, it also includes an outlet bushing and an outlet bushing temperature sensor, wherein the outlet bushing temperature sensor is connected to the outlet bushing, and the outlet bushing temperature sensor collects 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 close to the insulation weak point of the intelligent ring network cabinet. The partial discharge sensor collects partial discharge information of the insulation weak point and transmits the partial discharge information to the data processing unit.

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

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

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

[0011] Furthermore, it also includes a cable warehouse, a temperature and humidity sensor, a temperature and humidity controller, a temperature adjustment device, and a humidity adjustment device. The temperature and humidity sensor is arranged in the cable warehouse, and the temperature and humidity sensor is used to collect temperature information and humidity information in the cable warehouse and transmit the temperature information and humidity information to the temperature and humidity controller. The temperature and humidity controller controls the start and stop of the temperature adjustment device and the humidity adjustment device according to the temperature information and the humidity information.

[0012] Furthermore, it also includes a tilt sensor, which is arranged on the outer wall of the ring network cabinet. The tilt sensor collects posture information of the ring network cabinet and transmits the posture information to the data processing unit. When the posture 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 box body. The intelligent ring network cabinet is provided with an instrument room door, and the intelligent ring network cabinet is arranged in the outer box body. The first door control sensor is connected to the instrument room door, and the second door control sensor is connected to the outer box body. The first door control sensor collects the instrument room door information and transmits it to the data processing unit, and the second door control sensor collects the outer box door information and transmits it to the data processing unit.

[0014] The present invention provides an intelligent ring main unit monitoring method, comprising the following steps:

[0015] The data processing unit collects data in advance on the normal operating conditions and the mechanism failure conditions of the circuit breaker mechanisms of multiple intelligent ring network cabinets of the same model but different samples, and generates a data model. The data processing unit compares the data model with the information transmitted by the sensor in real time. If the information transmitted by the sensor in real time is within the normal value range, it is determined that the intelligent ring network cabinet is operating normally. If the information transmitted by the sensor in real time shows that the measured value exceeds the standard, the data processing unit compares it with the fault model in the data model to predict the cause of the fault.

[0016] Compared with the prior art, the intelligent ring main unit of the present invention has at least the following beneficial effects:

[0017] The intelligent ring network cabinet of the present invention includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. When the circuit breaker energy storage spring is not fully stored, the spring is aged, and the opening spring is aged and fails, the information collected by the first pressure sensor, the second pressure sensor, and the Hall sensor can be timely known, avoiding the need to wait until the fault is obvious and has affected the power supply before knowing it, thereby 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 detection time, improving the accuracy and efficiency of fault detection, and avoiding misjudgment.

[0018] The intelligent ring main unit of the present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the intelligent ring main unit of the present invention. DETAILED DESCRIPTION

[0020] like Figure 1As shown, the present invention provides an intelligent ring network cabinet, including a circuit breaker energy storage spring, a switching spring, a switching 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 switching spring, the Hall sensor is connected to the switching coil 12 and the energy storage motor, the first pressure sensor collects pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit, the second pressure sensor collects pressure information of the switching spring and transmits the pressure information to the data processing unit, and the Hall sensor collects action current information of the switching coil 12 and the energy storage motor and transmits the action current information to the data processing unit. The data processing unit monitors the pressure information of the circuit breaker energy storage spring collected by the first pressure sensor, and can know in advance whether the circuit breaker energy storage spring is in place and whether the spring is aging, so as to avoid the failure of opening and closing due to spring problems. The data processing unit monitors the pressure information of the opening spring collected by the second pressure sensor, which is helpful to judge the timeliness and effectiveness of the opening action. The action current information of the opening and closing coil 12 and the energy storage motor collected by the Hall sensor is the working current information of the intelligent ring network cabinet. The change of the working current reflects the working status of the key components. The data processing unit monitors the action current information. When the action current information fluctuates abnormally, it indicates that the coil short circuit, open circuit or motor blocking, short circuit and other problems may occur, so as to take timely measures. The data processing unit combines the pressure information of the circuit breaker energy storage spring and the opening spring, the action current information of the opening and closing coil and the energy storage motor, and judges whether the opening and closing action of the circuit breaker is smooth, timely and accurate, whether there are problems such as jamming and wear of mechanical parts, and comprehensively evaluates whether the mechanical characteristics of the intelligent ring network cabinet are normal. Specifically, the data processing unit collects data on the operation of the circuit breaker mechanism of the intelligent ring main unit in advance, collects data 10,000 times from different samples of the same model, including normal operation, mechanism failure, etc., summarizes the normal value ranges of the opening and closing speed, opening and closing current, energy storage current, circuit breaker energy storage spring pressure, and opening spring pressure during the circuit breaker operation, and the measurement value ranges under abnormal conditions, such as the stall current range when the motor is stalled, the opening and closing coil operation current range when the mechanism is stuck, etc., summarizes and organizes them through algorithms, and automatically generates targeted data models. The data processing unit performs all-round and dynamic monitoring of the ring main unit based on the data model and the information collected by the sensor in real time. If the real-time measurement values ​​of the sensor during operation are within the normal value range, it is determined that the intelligent ring main unit is operating normally. When the real-time measurement values ​​of the sensor during operation exceed the standard, it is compared with the fault model to predict the cause of the fault.The intelligent ring network cabinet of the present invention includes a first pressure sensor, a second pressure sensor, a Hall sensor, and a data processing unit. When the circuit breaker energy storage spring is not fully stored, the spring is aged, and the opening spring is aged and fails, the information collected by the first pressure sensor, the second pressure sensor, and the Hall sensor can be timely known, avoiding the need to wait until the fault is obvious and has affected the power supply before knowing it, thereby 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 detection time, improving the accuracy and efficiency of fault detection, and avoiding misjudgment.

[0021] Optionally, an intelligent ring network cabinet of the present invention further includes an outlet bushing 13 and an outlet bushing temperature sensor. The outlet bushing temperature sensor is connected to the outlet bushing 13. The outlet bushing temperature sensor collects the temperature information of the outlet bushing 13 and transmits the temperature information to the data processing unit. Specifically, the outlet bushing temperature sensor is a passive wireless temperature sensor. When the cable head has poor contact, overload, etc., the temperature will rise first. The data processing unit collects a large amount of operating data such as the outlet bushing temperature of the same model of ring network cabinets in advance, generates a targeted data model, and the data processing unit monitors the outlet bushing temperature of the ring network cabinet according to the data model and the temperature information of the outlet bushing 13. The temperature information measured by the outlet bushing temperature sensor is monitored by the data processing unit, and a timely warning is issued when the temperature information exceeds the normal threshold to prevent serious accidents such as fire caused by overheating.

[0022] Optionally, an intelligent ring network cabinet of the present invention further includes a partial discharge sensor, which is placed near the insulation weak point of the intelligent ring network cabinet. The partial discharge sensor collects partial discharge information of the insulation weak point and transmits the partial discharge information to the data processing unit. Specifically, the insulation weak points of the intelligent ring network cabinet include positions such as the casing and the interface 14 near the cable, and the partial discharge sensor is fixed to the side wall of the cable warehouse by magnetic attraction. The partial discharge phenomenon is an important representation of the degradation of insulation performance. The partial discharge signal of the ring network cabinet collected by the partial discharge sensor is monitored by the data processing unit, and the collected partial discharge signal is subjected to spectrum analysis, amplitude comparison and other processing, which can detect partial discharge abnormalities at an early stage, buy time for early maintenance and replacement of insulation components, and ensure the insulation safety of the ring network cabinet.

[0023] Optionally, an intelligent ring network cabinet of the present invention further 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 a data processing unit. The data processing unit combines the circuit breaker opening and closing coil action time and the circuit breaker opening and closing position information to draw a mechanism action curve. The angle information of the circuit breaker main shaft 15 collected by the angular displacement sensor is used to monitor each opening and closing action process, and problems and hidden dangers of the mechanism are discovered in time to ensure safe operation. Specifically, the angular displacement sensor is fixed on the circuit breaker main shaft 15. When the switch opens and 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.

[0024] Optionally, an intelligent ring network cabinet of the present invention further includes an outlet bushing 16 and a current transformer. The current transformer is arranged close to the outlet bushing 16. The current transformer collects the current information in the outlet bushing 16 and transmits the current information to the data processing unit. The current information in the outlet bushing 16 collected by the current transformer is the normal working current of the intelligent ring network cabinet, that is, the main circuit current. The data processing unit grasps the load condition of the line in real time through the current information in the outlet bushing 16 collected by the current transformer. The vacuum bubble cuts off the current and causes ablation to the contact. The data processing unit combines the big data model, the number of opening and closing times and the current information in the outlet bushing 16 to predict the electrical life of the vacuum bubble, provide a scientific basis for the preventive maintenance of the equipment, reasonably arrange the equipment maintenance and replacement plan, reduce the operation and maintenance cost, and improve the power supply reliability.

[0025] Optionally, an intelligent ring network cabinet of the present invention further includes an air box 17 and an electronic density relay. The electronic density relay is arranged in the air box 17. The electronic density relay is used to measure the pressure information in the air box 17 and transmit the pressure information to the data processing unit. Specifically, the electronic density relay is installed on the upper left of the front of the air box 17. A sealing stop valve is arranged on the air box 17. The air box is inflated through the sealing stop valve. When the pressure gauge is not installed, it can ensure that the air box does not leak. The stability of the pressure in the air box is very important for the insulation performance inside the ring network cabinet and the normal operation of the equipment. The data processing unit combines the pressure information in the air box 17, the ambient temperature and other information, and compares it with the normal operation pressure curve. When the pressure drop rate in the air box 17 is too fast or lower than the set threshold, it is determined that there is a leakage problem in the air box, and the leakage area is located, which is convenient for maintenance personnel to quickly find the fault point and reserve sufficient processing time.

[0026] Optionally, an intelligent ring network cabinet of the present invention further includes a cable warehouse, 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 arranged in the cable warehouse, and the temperature and humidity sensor is used to collect temperature information and humidity information in the cable warehouse and transmit the temperature information 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 information and humidity information. Specifically, the temperature and humidity controller is arranged on the panel of the instrument room of the ring network cabinet, and the temperature and humidity sensor is used to collect the environmental information in the ring network cabinet to provide a basis for the data judgment of the temperature and humidity controller. The temperature and humidity controller can automatically control the start and stop of the heater, dehumidifier, fan and other environmental control equipment according to the temperature and humidity conditions.

[0027] Optionally, an intelligent ring network cabinet of the present invention also includes a tilt sensor, which is arranged on the outer wall of the cabinet body of the ring network cabinet. The tilt sensor collects posture information of the ring network cabinet and transmits the posture information to the data processing unit. When the posture information exceeds the standard, the data processing unit issues a warning, prompting the operation and maintenance personnel to check the foundation, surrounding environment, etc., to eliminate safety hazards, prevent the ring network cabinet from tilting due to foundation settlement, external force collision, etc., and avoid the ring network cabinet from tilting too much during transportation and use, damaging the connection lines of internal equipment and causing failures.

[0028] Optionally, an intelligent ring network cabinet of the present invention also includes a first door control sensor, a second door control sensor, an instrument room door 18, and an outer box body. The intelligent ring network cabinet is provided with an instrument room door 18, and the intelligent ring network cabinet is arranged in the outer box body. The first door control sensor is connected to the instrument room door, and the second door control sensor is connected to the outer box body. The first door control sensor collects the instrument room door information and transmits it to the data processing unit, and the second door control sensor collects the outer box door information and transmits it to the data processing unit. The data processing unit determines whether the instrument room door and the outer box door are closed normally according to the instrument room door information and the outer box door information, so as to avoid the entry of foreign objects such as rainwater, insects and rats due to the instrument room door and the outer box door not being closed properly, thereby affecting the normal operation of the equipment, and at the same time preventing unauthorized opening to ensure the safety of the equipment.

[0029] The present invention provides a monitoring method for an intelligent ring main unit, wherein the intelligent ring main unit includes a data processing unit, and comprises the following steps:

[0030] The data processing unit collects data of the circuit breaker mechanism of multiple intelligent ring network cabinets of the same model and different samples in advance, data of normal operation conditions and data of mechanism fault conditions, summarizes the normal value range of the opening and closing speed, opening and closing current, energy storage current, circuit breaker energy storage spring pressure, opening spring pressure during the circuit breaker operation, and the range of each measurement value under abnormal conditions, such as the stall current range when the motor is stalled, the opening and closing coil action current range when the mechanism is stuck, etc., summarizes and organizes through algorithms, and automatically generates a targeted data model. The data processing unit performs all-round and dynamic monitoring of the ring network cabinet based on the data model and the information collected by the sensor in real time. If the real-time measurement values ​​of the sensor during operation are all within the normal value range, it is determined that the intelligent ring network cabinet is operating normally. When the real-time measurement values ​​of the sensor during operation exceed the standard, it is compared with the fault model to predict the cause of the fault. In this embodiment, the data processing unit collects 10,000 data from different models and different samples to form a data model.

[0031] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent ring main unit, comprising a circuit breaker energy storage spring, a switch opening spring, a switch opening and closing coil (12), and an energy storage motor, characterized in that: The invention also comprises 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 pressure information of the circuit breaker energy storage spring and transmits the pressure information to the data processing unit. 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 (12) and the energy storage motor and transmits the action current information to the data processing unit.

2. The intelligent ring main unit according to claim 1, characterized in that: It also comprises an outlet bushing (13) and an outlet bushing temperature sensor, wherein the outlet bushing temperature sensor is connected to the outlet bushing (13), and the outlet bushing temperature sensor collects temperature information of the outlet bushing (13) and transmits the temperature information to the data processing unit.

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

4. The intelligent ring main unit according to claim 3 is characterized in that: It also includes a circuit breaker main shaft (15) and an angular displacement sensor, wherein the angular displacement sensor collects angle information of the circuit breaker main shaft (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 an outlet bushing (16) and a current transformer, wherein the current transformer is arranged close to the outlet bushing (16), and the current transformer collects current information in the outlet bushing (16) 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, wherein the electronic density relay is arranged in the air box (17), and the electronic density relay is used to measure the pressure information in 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 warehouse, a temperature and humidity sensor, a temperature and humidity controller, a temperature adjustment device, and a humidity adjustment device. The temperature and humidity sensor is arranged in the cable warehouse. The temperature and humidity sensor is used to collect temperature information and humidity information in the cable warehouse and transmit the temperature information and humidity information to the temperature and humidity controller. The temperature and humidity controller controls the start and stop of the temperature adjustment device and the humidity adjustment device according to the temperature information and the humidity information.

8. The intelligent ring main unit according to claim 7, characterized in that: It also includes a tilt sensor, which is arranged on the outer wall of the ring network cabinet. The tilt sensor collects posture information of the ring network cabinet and transmits the posture information to the data processing unit. When the posture 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 box body. The intelligent ring network cabinet is provided with an instrument room door (18), and the intelligent ring network cabinet is arranged in the outer box body. The first door control sensor is connected to the instrument room door (18), and the second door control sensor is connected to the outer box body. 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 box body door and transmits it to the data processing unit.

10. The intelligent ring main unit monitoring method according to any one of claims 1 to 9, characterized in that: The steps include: The data processing unit collects data in advance on the normal operating conditions and the mechanism failure conditions of the circuit breaker mechanisms of multiple intelligent ring network cabinets of the same model but different samples, and generates a data model. The data processing unit compares the data model with the information transmitted by the sensor in real time. If the information transmitted by the sensor in real time is within the normal value range, it is determined that the intelligent ring network cabinet is operating normally. If the information transmitted by the sensor in real time shows that the measured value exceeds the standard, the data processing unit compares it with the fault model in the data model to predict the cause of the fault.

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