A fault detection system

Abstract

The application discloses a kind of fault detection systems, and fault detection system master control module is respectively connected with secondary operation module, power module, hall voltage sensor, loop broken detection module and switch electricity, master control module is respectively connected with first hall current sensor and second hall current sensor communication connection;Secondary operation module is respectively connected with power module, one end of first hall current sensor, one end of second hall current sensor and hall voltage sensor electricity;Power module is respectively connected with first hall current sensor, second hall current sensor, hall voltage sensor and loop broken detection module electricity;The other end of first hall current sensor is connected with switch electricity;Loop broken detection module is respectively connected with the other end of second hall current sensor and switch electricity.The application is controlled loop fault detection of secondary operation module and fault detection system by first hall current sensor, second hall current sensor, hall voltage sensor.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, and in particular to a fault detection system. Background Technology

[0002] As a crucial component in power distribution network construction, the 10kV power ring main unit plays a vital role in the entire power system, distributing and supplying power to users.

[0003] Currently, ring main units (RMUs) frequently experience burnt-out opening and closing coils or short-circuit faults during operation. The current in the opening and closing circuits is primarily cut off by the auxiliary contacts of the circuit breakers or relays linked to the mechanism. If the auxiliary contacts fail to switch properly for some reason, or if the operating mechanism jams, the opening and closing coils may burn out. In existing RMUs, fault detection of the circuit breaker and load switch control and operating circuits often relies solely on manual inspection. Defects affecting RMU operation are frequently only discovered during operation, significantly impacting the stability of the RMU system. Summary of the Invention

[0004] This invention provides a fault detection system that monitors ring main unit systems in real time, ensuring the safety and stability of the ring main unit system during operation.

[0005] According to one aspect of the present invention, an embodiment of the present invention provides a fault detection system, the fault detection system comprising: a main control module, a secondary operation module, a power supply module, a first Hall current sensor, a second Hall current sensor, a Hall voltage sensor, a circuit break detection module, and a switch; wherein,

[0006] The main control module is electrically connected to the secondary operation module, the power supply module, the Hall voltage sensor, the loop disconnection detection module, and the switch. The main control module is also communicatively connected to the first Hall current sensor and the second Hall current sensor. The secondary operation module is electrically connected to the power supply module, one end of the first Hall current sensor, one end of the second Hall current sensor, and the Hall voltage sensor. The power supply module is electrically connected to the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the loop disconnection detection module. The other end of the first Hall current sensor is electrically connected to the switch. The loop disconnection detection module is electrically connected to the other end of the second Hall current sensor and the switch.

[0007] When the fault detection system is working, it uses the first Hall current sensor, the second Hall current sensor, and the Hall voltage sensor to detect faults in the control loop of the secondary operation module and the fault detection system.

[0008] Optionally, the fault detection system also includes two analog-to-digital (A / D) converters; one end of one A / D converter is electrically connected to the first Hall current sensor, and the other end of the other A / D converter is electrically connected to the main control module; one end of the other A / D converter is electrically connected to the second Hall current sensor, and the other end of the other A / D converter is electrically connected to the main control module; the A / D converters are used to convert the analog signals collected by the first Hall current sensor and the second Hall current sensor into digital signals, and transmit the digital signals to the main control module.

[0009] Optionally, the first Hall current sensor and the second Hall current sensor are used to detect the current signal and transmit the current signal to the main control module.

[0010] Optionally, the Hall voltage sensor includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal; wherein the first and second terminals are electrically connected to the voltage input and voltage output terminals of the secondary operation module, and are used to detect the voltage input and voltage output terminals of the secondary operation module; the third and fourth terminals are electrically connected to the positive and negative terminals of the power supply module, and the fifth terminal is electrically connected to the signal output terminal of the power supply module.

[0011] Optionally, a Hall voltage sensor is used to detect voltage signals and transmit them to the main control module.

[0012] Optionally, the main control module includes a microcontroller unit (MCU); wherein the MCU is used to receive current signals and voltage signals, and to determine whether the control loop of the secondary operation module and the fault detection system has malfunctioned based on the current signals and voltage signals.

[0013] Optionally, the main control module also includes a wireless transceiver chip; wherein, the wireless transceiver chip enables communication between the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor and the main control module through ZigBee node communication.

[0014] Optionally, the circuit disconnection detection module is connected in series with the control circuit of the switch to detect the current output of the control circuit of the fault detection system.

[0015] Optionally, the wireless transceiver chip is connected to the MCU via a serial peripheral interface (SPI); wherein the wireless transceiver chip is a combination of NRF24LO1 and a single-chip wireless transceiver chip.

[0016] Optionally, the fault detection system also includes a timer; wherein the timer is electrically connected to the main control module and the power supply module, and is used to restart the fault detection system when a fault occurs.

[0017] The technical solution of this invention includes a fault detection system comprising: a main control module, a secondary operation module, a power supply module, a first Hall current sensor, a second Hall current sensor, a Hall voltage sensor, a loop disconnection detection module, and a switch. The main control module is electrically connected to the secondary operation module, the power supply module, the Hall voltage sensor, the loop disconnection detection module, and the switch. The main control module is also communicatively connected to the first and second Hall current sensors. The secondary operation module is electrically connected to the power supply module, one end of the first Hall current sensor, one end of the second Hall current sensor, and the Hall voltage sensor. The power supply module is electrically connected to the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the loop disconnection detection module. The other end of the first Hall current sensor is electrically connected to the switch. The loop disconnection detection module is electrically connected to the other end of the second Hall current sensor and the switch. During operation, the fault detection system uses the first Hall current sensor, the second Hall current sensor, and the Hall voltage sensor to detect faults in the control loop of the secondary operation module and the fault detection system. This invention uses a first Hall current sensor and a second Hall current sensor to detect the current in the control loop of the secondary operation module and the fault detection system, and a Hall voltage sensor to detect the voltage in the control loop of the secondary operation module and the fault detection system. This enables fault detection in the control loop of the secondary operation module and the fault detection system, real-time monitoring of the ring main unit system, and ensures the safety and stability of the ring main unit system during operation.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a fault detection system provided in Embodiment 1 of the present invention;

[0021] Figure 2 This is a connection diagram of a timer provided in Embodiment 1 of the present invention.

[0022] Figure 3 This is a connection diagram of a converter provided in Embodiment 2 of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a main control module provided in Embodiment 3 of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] Example 1

[0027] Figure 1 This is a schematic diagram of a fault detection system provided in Embodiment 1 of the present invention. This embodiment is applicable to fault detection of ring main units. Figure 1 As shown, the fault detection system of this embodiment of the invention specifically includes: a main control module 1, a secondary operation module 2, a power supply module 3, a first Hall current sensor 4, a second Hall current sensor 5, a Hall voltage sensor 6, a circuit break detection module 7, and a switch 8. Among them,

[0028] The main control module 1 is electrically connected to the secondary operation module 2, the power supply module 3, the Hall voltage sensor 6, the loop disconnection detection module 7, and the switch 8. The main control module 1 is communicatively connected to the first Hall current sensor 4 and the second Hall current sensor 5. The secondary operation module 2 is electrically connected to the power supply module 3, one end of the first Hall current sensor 4, one end of the second Hall current sensor 5, and the Hall voltage sensor 6. The power supply module 3 is electrically connected to the first Hall current sensor 4, the second Hall current sensor 5, the Hall voltage sensor 6, and the loop disconnection detection module 7. The other end of the first Hall current sensor 4 is electrically connected to the switch 8. The loop disconnection detection module 7 is electrically connected to the other end of the second Hall current sensor 5 and the switch 8.

[0029] When the fault detection system is working, the first Hall current sensor 4, the second Hall current sensor 5, and the Hall voltage sensor 6 are used to detect faults in the control loop of the secondary operation module 2 and the fault detection system.

[0030] The main control module 1 is electrically connected to the secondary operation module 2, the power supply module 3, the Hall voltage sensor 6, the circuit disconnection detection module 7, and the switch 8, respectively. It is used to receive current signals and voltage signals, and to determine whether the control circuit of the secondary operation module 2 and the fault detection system has a fault through the current signals and voltage signals.

[0031] The main control module 1 is communicatively connected to the first Hall current sensor 4 and the second Hall current sensor 5. When the first Hall current sensor 4 and the second Hall current sensor 5 collect current signals, they transmit the current signals to the main control module 1 through the communication connection.

[0032] The secondary operation module 2 is electrically connected to the power supply module 3, one end of the first Hall current sensor 4, one end of the second Hall current sensor 5, and the Hall voltage sensor 6, respectively. The power supply module 3 is used to supply power to the secondary operation module 2. The first Hall current sensor 4 and the second Hall current sensor are used to collect the current signals at both ends of the secondary operation module 2. The Hall voltage sensor 6 is used to collect the voltage signals at both ends of the secondary operation module 2.

[0033] Based on the above embodiments, optionally, the Hall voltage sensor 6 includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal; wherein, the first terminal and the second terminal are electrically connected to the voltage input terminal and the voltage output terminal of the secondary operation module 2, and are used to detect the voltage input terminal and the voltage output terminal of the secondary operation module 2; the third terminal and the fourth terminal are electrically connected to the positive terminal and the negative terminal of the power supply module 3, and the fifth terminal is electrically connected to the signal output terminal of the power supply module 3.

[0034] Based on the above embodiments, optionally, the Hall voltage sensor 6 is used to detect the voltage signal and transmit the voltage signal to the main control module 1.

[0035] The power supply module 3 is electrically connected to the first Hall current sensor 4, the second Hall current sensor 5, the Hall voltage sensor 6, and the loop disconnection detection module 7, respectively; the power supply module 3 is used to supply power to the first Hall current sensor 4, the second Hall current sensor 5, the Hall voltage sensor 6, and the loop disconnection detection module 7.

[0036] The other end of the first Hall current sensor 4 is electrically connected to the switch 8; the circuit disconnection detection module 7 is electrically connected to the other end of the second Hall current sensor 5 and the switch 8 respectively. The first Hall current sensor 4 and the second Hall current sensor 5 are also used to collect the current signal of the control circuit of the fault detection system, and further determine whether the control circuit of the fault detection system has a fault through the current signal.

[0037] Based on the above embodiments, when the main control module 1 receives the current signals sent by the first Hall current sensor 4 and the second Hall current sensor 5, and receives the voltage signal sent by the Hall voltage sensor 6, if the current value corresponding to the current signal is less than the first preset current value, it determines that the secondary control module 2 is in an open-circuit state or that the control circuit of the fault detection system has no power; if the current value corresponding to the current signal is greater than the second preset current value, it determines that the current working state of the secondary control module 2 or the control circuit of the fault detection system is currently in an overload state. The first preset current value and the second preset current value are preset values ​​used to determine the current values ​​corresponding to the current signals collected by the first Hall current sensor 4 and the second Hall current sensor 5, and the first preset current value is less than the second preset current value to prevent the control circuit of the secondary control module 2 and the fault detection system from malfunctioning. If the voltage value corresponding to the voltage signal is greater than the second preset voltage value, it determines that the control circuit of the secondary control module 2 or the fault detection system has an open-circuit fault; if the voltage value corresponding to the voltage signal is greater than the first preset voltage value and less than the second preset voltage value, it determines that the working state of the fault detection system is a normal working state, and the first preset voltage value is less than the second preset voltage value. The advantage of this setup is that by detecting the current and voltage signals of the control loop of the secondary control module 2 or the fault detection system in advance, early warning can be achieved, thereby improving the stability of the fault detection system.

[0038] Furthermore, through The operating status of the fault detection system loop is determined, where P represents the operating status of the fault detection system, u represents the instantaneous voltage, i represents the instantaneous current, and t represents the energization time of the fault detection system. Specifically, under normal circumstances, the operating power of the secondary control module 2 remains basically constant. When P shows a decreasing trend, it indicates an increased possibility of the switch tripping unexpectedly. The daily power consumption of the secondary control module 2 is accumulated over a specified period of one day for comparison, achieving real-time monitoring of the integrity of the secondary control module 2. Alarm prompts are issued when the loop is disconnected, power is lost, or the trip / close coil is short-circuited or open-circuited, achieving full-condition monitoring of the secondary control module 2.

[0039] Based on the above embodiments, optionally, the circuit disconnection detection module 7 is connected in series with the control circuit of the switch 8 to detect the current output of the control circuit of the fault detection system.

[0040] Based on the above embodiments, optionally, Figure 2 This is a connection diagram of a timer provided in Embodiment 1 of the present invention, as shown below. Figure 2 As shown, the fault detection system in this embodiment of the invention further includes a timer 9. The timer 9 is electrically connected to the main control module 1 and the power supply module 3, and is used to restart the fault detection system when a fault occurs.

[0041] The technical solution of this invention includes a fault detection system comprising: a main control module, a secondary operation module, a power supply module, a first Hall current sensor, a second Hall current sensor, a Hall voltage sensor, a loop disconnection detection module, and a switch. The main control module is electrically connected to the secondary operation module, the power supply module, the Hall voltage sensor, the loop disconnection detection module, and the switch. The main control module is also communicatively connected to the first and second Hall current sensors. The secondary operation module is electrically connected to the power supply module, one end of the first Hall current sensor, one end of the second Hall current sensor, and the Hall voltage sensor. The power supply module is electrically connected to the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the loop disconnection detection module. The other end of the first Hall current sensor is electrically connected to the switch. The loop disconnection detection module is electrically connected to the other end of the second Hall current sensor and the switch. During operation, the fault detection system uses the first Hall current sensor, the second Hall current sensor, and the Hall voltage sensor to detect faults in the control loop of the secondary operation module and the fault detection system. Based on the above embodiments, the current of the control loop of the secondary operation module and the fault detection system is detected by the first Hall current sensor and the second Hall current sensor, and the voltage of the control loop of the secondary operation module and the fault detection system is detected by the Hall voltage sensor, thereby realizing fault detection of the control loop of the secondary operation module and the fault detection system, real-time detection of the ring main unit system, and ensuring the safety of the ring main unit system and the stability of its operation.

[0042] Example 2

[0043] Figure 3 This is a connection diagram of a converter provided in Embodiment 2 of the present invention. This embodiment can be applied to fault detection of ring main units. Figure 3 As shown, the fault detection system of this embodiment further includes two analog-to-digital (A / D) converters 10. Wherein,

[0044] One end of an A / D converter 10 is electrically connected to the first Hall current sensor 4, and the other end of an A / D converter 9 is electrically connected to the main control module 1; one end of another A / D converter 10 is electrically connected to the second Hall current sensor 5, and the other end of another A / D converter 10 is electrically connected to the main control module 1.

[0045] The A / D converter 10 is used to convert the analog signals collected by the first Hall current sensor 4 and the second Hall current sensor 5 into digital signals, and transmit the digital signals to the main control module 1.

[0046] The technical solution of this invention includes a fault detection system further comprising two A / D converters. One end of one A / D converter is electrically connected to a first Hall current sensor, and the other end of the other A / D converter is electrically connected to the main control module; one end of the other A / D converter is electrically connected to a second Hall current sensor, and the other end of the other A / D converter is electrically connected to the main control module. Based on the above embodiment, after the first and second Hall current sensors acquire current signals, which are analog signals, the analog signals are converted into digital signals by the A / D converters and transmitted to the main control module. This allows the main control module to determine whether the control loop of the secondary operation module and the fault detection system is faulty based on the received digital signals, thereby enabling real-time monitoring of the ring main unit system and ensuring the safety and stability of the ring main unit system's operation.

[0047] Example 3

[0048] Figure 4 This is a schematic diagram of the main control module provided in Embodiment 3 of the present invention. This embodiment is applicable to fault detection of ring main units. Figure 4 As shown, the main control module 1 in this embodiment of the invention includes: a microcontroller unit (MCU) 11 and a wireless transceiver chip 12. Wherein,

[0049] MCU11 receives current and voltage signals and uses these signals to determine whether the control loops of the secondary operation module and fault detection system have malfunctioned. Wireless transceiver chip 12 enables communication between the first Hall current sensor 4, the second Hall current sensor 5, the Hall voltage sensor 6, and the main control module 1 via ZigBee node communication. Wireless transceiver chip 12 connects to MCU11 via a Serial Peripheral Interface (SPI).

[0050] Among them, the wireless transceiver chip 12 is a combination of NRF24LO1 and a single wireless transceiver chip. The NRF24LO1+ wireless transceiver chip has extremely low current consumption, can operate in the 2.4-2.5 GHz band, and has a current consumption of 11.3 mA when the transmission power is 0 dBmW in the transmission mode and 13.5 mA in the reception mode. The current consumption is even lower in the power-down mode and standby mode. It supports automatic response and automatic retransmission, and has built-in address and CRC data verification functions. It has a wide operating temperature range and can adapt to the harsh working environment of the ring network cabinet.

[0051] Specifically, the wireless transceiver chip can connect to the MCU via an SPI interface. This chip enables communication with other ZigBee nodes and ultimately transmits the collected data to the main control unit. Due to the excellent characteristics of the NRF24LO1+ wireless transceiver chip, all sensor nodes in the online monitoring subsystem will work with this chip to communicate with the main control unit via the ZigBee network.

[0052] The technical solution of this invention includes a main control module comprising an MCU and a wireless transceiver chip. The MCU receives current and voltage signals and uses these signals to determine whether a fault has occurred in the control loop of the secondary operation module and the fault detection system. The wireless transceiver chip enables communication between the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the main control module via ZigBee node communication. The wireless transceiver chip connects to the MCU via a Serial Peripheral Interface (SPI); specifically, the wireless transceiver chip is a combination of an NRF24LO1 and a single-chip wireless transceiver. Based on the above embodiments, the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor and the main control module are communicated through ZigBee node communication via a wireless transceiver chip. The wireless transceiver chip is connected to the MCU through a Serial Peripheral Interface (SPI). After receiving the current signal and voltage signal through communication, the wireless transceiver chip sends the current signal and voltage signal to the MCU, so that the MCU can determine whether the fault detection system is faulty based on the current signal and voltage signal, and monitor the ring main unit system in real time to ensure the safety and stability of the ring main unit system.

[0053] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fault detection system, characterized in that, The fault detection system includes: a main control module, a secondary operation module, a power supply module, a first Hall current sensor, a second Hall current sensor, a Hall voltage sensor, a circuit break detection module, and a switch; wherein... The main control module is electrically connected to the secondary operation module, the power supply module, the Hall voltage sensor, the loop disconnection detection module, and the switch. The main control module is communicatively connected to the first Hall current sensor and the second Hall current sensor. The secondary operation module is electrically connected to the power supply module, one end of the first Hall current sensor, one end of the second Hall current sensor, and the Hall voltage sensor. The power supply module is electrically connected to the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the loop disconnection detection module. The other end of the first Hall current sensor is electrically connected to the switch. The loop disconnection detection module is electrically connected to the other end of the second Hall current sensor and the switch. When the fault detection system is working, fault detection is performed on the secondary operation module and the control loop of the fault detection system through the first Hall current sensor, the second Hall current sensor, and the Hall voltage sensor. The first Hall current sensor and the second Hall current sensor are used to detect current signals and transmit the current signals to the main control module; The Hall voltage sensor is used to detect voltage signals and transmit the voltage signals to the main control module; The main control module receives current signals from the first Hall current sensor and the second Hall current sensor, and after receiving the voltage signal from the Hall voltage sensor, performs fault detection on the control loop of the secondary operation module and the fault detection system, including: If the current value corresponding to the current signal is less than the first preset current value, it is determined that the secondary operation module is in an open circuit state or the control circuit of the fault detection system has no power; if the current value corresponding to the current signal is greater than the second preset current value, it is determined that the secondary operation module or the control circuit of the fault detection system is currently in an overload state; wherein, the first preset current value is less than the second preset current value. If the voltage value corresponding to the voltage signal is greater than the second preset voltage value, it is determined that the control circuit of the secondary operation module or the fault detection system has a disconnection fault; if the voltage value corresponding to the voltage signal is greater than the first preset voltage value and less than the second preset voltage value, it is determined that the working state of the fault detection system is a normal working state.

2. The fault detection system according to claim 1, characterized in that, The fault detection system also includes two analog-to-digital A / D converters; wherein... One end of one A / D converter is electrically connected to the first Hall current sensor, and the other end of the A / D converter is electrically connected to the main control module; one end of another A / D converter is electrically connected to the second Hall current sensor, and the other end of the other A / D converter is electrically connected to the main control module. The A / D converter is used to convert the analog signals collected by the first Hall current sensor and the second Hall current sensor into digital signals, and transmit the digital signals to the main control module.

3. The fault detection system according to claim 1, characterized in that, The Hall voltage sensor includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal; wherein, The first terminal and the second terminal are electrically connected to the voltage input terminal and the voltage output terminal of the secondary operation module, and are used to detect the voltage input terminal and the voltage output terminal of the secondary operation module. The third and fourth terminals are electrically connected to the positive and negative terminals of the power module, respectively, and the fifth terminal is electrically connected to the signal output terminal of the power module.

4. The fault detection system according to claim 1, characterized in that, The main control module includes a microcontroller unit (MCU); wherein... The MCU is used to receive the current signal and the voltage signal, and to determine whether the control loop of the secondary operation module and the fault detection system has malfunctioned based on the current signal and the voltage signal.

5. The fault detection system according to claim 4, characterized in that, The main control module also includes a wireless transceiver chip; wherein... The wireless transceiver chip enables communication between the first Hall current sensor, the second Hall current sensor, the Hall voltage sensor, and the main control module via ZigBee node communication.

6. The fault detection system according to claim 1, characterized in that, The circuit disconnection detection module is connected in series in the control circuit of the switch and is used to detect the current output of the control circuit of the fault detection system.

7. The fault detection system according to claim 5, characterized in that, The wireless transceiver chip is connected to the MCU via a serial peripheral interface (SPI); wherein the wireless transceiver chip is a combination of an NRF24LO1 and a single-chip wireless transceiver chip.

8. The fault detection system according to claim 1, characterized in that, The fault detection system also includes a timer; wherein... The timer is electrically connected to the main control module and the power supply module, and is used to restart the fault detection system when the fault detection system fails.

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