Intelligent circuit breaker and control method and system thereof

Abstract

The invention discloses an intelligent circuit breaker, which comprises a circuit breaker main body, a voltage detection circuit, an electric field intensity detection circuit and a main control circuit, the circuit breaker main body is provided with a main loop input end, a main loop output end and a line switch, the voltage detection circuit is respectively connected with the main loop input end and the main loop output end, and the electric field intensity detection circuit is arranged at a position close to the line switch. And when the main control circuit determines that the line switch is subjected to severe pulse interference and / or severe radio frequency interference according to a voltage detection signal of the voltage detection circuit and an electric field intensity detection signal of the electric field intensity detection circuit, the main control circuit controls the line switch to disconnect a path between the main loop input end and the main loop output end. The invention further discloses a corresponding control method and system. According to the intelligent circuit breaker, when the voltage detection circuit and the electric field intensity detection circuit determine that the line switch is subjected to pulse interference and radio frequency interference, the line switch is controlled to be switched off, and the safety and reliability of the intelligent circuit breaker are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to an intelligent circuit breaker and a control method and system thereof. Background Art

[0002] Smart circuit breakers play an important role in circuit protection, intelligent control and improving the reliability of power systems. They are used to close, carry and disconnect currents under normal circuit conditions, and can connect and disconnect mechanical switching devices that carry currents under specified abnormal circuit conditions and within a certain period of time. In a complex electromagnetic environment, smart circuit breakers may be interfered with by other electrical equipment, affecting their normal operation. Since smart circuit breakers contain a large number of electronic components and integrated circuits, they are susceptible to pulse interference and radio frequency interference, which may cause the circuit switch in the smart circuit breaker to malfunction, and even cause arcs or sparks between the contacts of the circuit switch, resulting in ablation and oxidation of the contact surface, causing poor contact and impacting the mechanical structure of the circuit switch. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intelligent circuit breaker and a control method and system thereof, which can improve the safety and reliability of the intelligent circuit breaker.

[0004] In order to solve the above technical problems, as a first aspect of the present invention, an intelligent circuit breaker is provided, the intelligent circuit breaker comprising: a circuit breaker body, having a main circuit input terminal, a main circuit output terminal and a line switch, the main circuit input terminal, the line switch and the main circuit output terminal are connected to form a main circuit; the line switch is used to control the connection or disconnection between the main circuit input terminal and the main circuit output terminal; a voltage detection circuit, the voltage detection circuit is respectively connected to the main circuit input terminal and the main circuit output terminal; the voltage detection circuit is used to detect the voltage between the main circuit input terminal and the main circuit output terminal, and output a voltage detection signal; an electric field strength detection circuit A detection circuit, wherein the electric field strength detection circuit is arranged at a position close to the line switch; the electric field strength detection circuit is used to detect the change of the electric field strength near the line switch and output an electric field strength detection signal; a main control circuit, wherein the input end of the main control circuit is respectively connected to the voltage detection circuit and the electric field strength detection circuit, and the control end of the main control circuit is connected to the line switch; the main control circuit is used to control the line switch to disconnect the path between the main circuit input end and the main circuit output end when it is determined that the line switch is subject to severe pulse interference and / or severe radio frequency interference according to the voltage detection signal and the electric field strength detection signal.

[0005] Optionally, the main control circuit is specifically used to determine the actual voltage of the line switch according to the voltage detection signal, compare the actual voltage with a first preset voltage, and determine that the line switch is subject to severe pulse interference when the actual voltage exceeds the first preset voltage; and determine the actual electric field strength of the line switch according to the electric field strength detection signal, compare the actual electric field strength with a first electric field strength, and determine that the line switch is subject to severe radio frequency interference when the actual electric field strength exceeds the first electric field strength.

[0006] Optionally, the main control circuit is further used to compare the actual voltage with a second preset voltage, and determine that the line switch is subject to lower pulse interference when the actual voltage exceeds the second preset voltage; and determine the actual electric field strength of the line switch according to the electric field strength detection signal, compare the actual electric field strength with the second electric field strength, and determine that the line switch is subject to lower radio frequency interference when the actual electric field strength exceeds the second electric field strength.

[0007] Optionally, a voltage value of the first preset voltage is greater than a voltage value of the second preset voltage, and an electric field strength value of the first electric field strength is greater than an electric field strength value of the second electric field strength.

[0008] Optionally, the intelligent circuit breaker also includes: a pulse filtering circuit, the controlled end of the pulse filtering circuit is connected to the main control circuit, and the pulse filtering circuit is respectively connected to the main circuit input end and the main circuit output end; the main control circuit is also used to control the pulse filtering circuit to filter out the pulse interference between the main circuit input end and the main circuit output end when it is determined that the line switch is subject to lower pulse interference.

[0009] Optionally, the intelligent circuit breaker further includes: a radio frequency filtering circuit, a controlled end of the radio frequency filtering circuit is connected to the main control circuit, and the radio frequency filtering circuit is respectively connected to the main circuit input end and the main circuit output end; the main control circuit is further used to control the radio frequency filtering circuit to filter out the radio frequency interference between the main circuit input end and the main circuit output end when it is determined that the line switch is subject to lower radio frequency interference.

[0010] Optionally, the intelligent circuit breaker further includes: a communication circuit, the communication circuit is used to connect to a remote terminal, the communication circuit is connected to the main control circuit; the communication circuit is used to establish a connection path between the remote terminal and the main control circuit; the main control circuit is also used to send the voltage detection signal and the electric field strength detection signal to the remote terminal through the communication circuit, so that the remote terminal performs data statistics on the voltage detection signal and the electric field strength detection signal.

[0011] Optionally, the communication circuit is also used to connect a local terminal; the communication circuit is also used to establish a connection path between the local terminal and the main control circuit; the main control circuit is also used to send the voltage detection signal and the electric field strength detection signal to the local terminal through the communication circuit, and receive a control instruction sent by the local terminal through the communication circuit, and control the line switch to connect or disconnect the path between the main circuit input terminal and the main circuit output terminal according to the control instruction.

[0012] The present invention also proposes a method for controlling an intelligent circuit breaker, wherein the intelligent circuit breaker comprises a circuit breaker body, a voltage detection circuit and an electric field strength detection circuit, wherein the circuit breaker body comprises a main circuit input terminal, a main circuit output terminal and a line switch, wherein the main circuit input terminal, the line switch and the main circuit output terminal are connected to form a main circuit, and the line switch is used to control the connection or disconnection between the main circuit input terminal and the main circuit output terminal, wherein the method comprises: detecting the voltage between the main circuit input terminal and the main circuit output terminal by means of a voltage detection circuit, and obtaining a voltage detection signal output by the voltage detection circuit; detecting the change of the electric field strength near the line switch by means of an electric field strength detection circuit, and obtaining an electric field strength detection signal output by the electric field strength detection circuit; and determining, according to the voltage detection signal and the electric field strength detection signal, that the line switch is subjected to severe pulse interference and / or severe radio frequency interference, controlling the line switch to disconnect the path between the main circuit input terminal and the main circuit output terminal.

[0013] The present invention further provides an intelligent circuit breaker system, which includes a local terminal, a remote terminal and the intelligent circuit breaker.

[0014] The implementation of the embodiments of the present invention has the following beneficial effects:

[0015] The present invention provides an intelligent circuit breaker and a control method and system thereof. The voltage and electric field strength of a line switch are monitored in real time through a voltage detection circuit and an electric field strength detection circuit. Once severe pulse interference or radio frequency interference is detected, the line switch is immediately controlled to disconnect, thereby effectively isolating the interference source, protecting the intelligent circuit breaker and other circuit elements from damage, and improving the overall safety and reliability of the system.

[0016] At the same time, the present invention not only disconnects the line switch when severe interference is detected, but also filters out interference by starting a pulse filtering circuit or a radio frequency filtering circuit when a lower degree of interference is detected, thereby achieving multi-level protection, reducing false operations and failures caused by interference, and extending the service life of the intelligent circuit breaker.

[0017] In addition, in the present invention, by connecting the remote terminal through the communication circuit, remote monitoring and management of the intelligent circuit breaker can be realized, and voltage and electric field strength data can be obtained in real time, and data statistics and analysis can be performed to provide decision support for equipment maintenance and management, thereby improving management efficiency.

[0018] The communication circuit of the present invention also supports connection to a local terminal, allowing on-site staff to view the operating parameters of the intelligent circuit breaker in real time and send control instructions through the local terminal when necessary, thereby achieving rapid response and emergency processing, thereby improving the flexibility and emergency processing capabilities of the system.

[0019] The present invention is particularly suitable for complex electromagnetic environments, can effectively resist interference from other electrical equipment, ensure the stable operation of the intelligent circuit breaker under various harsh conditions, and improve the adaptability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0021] Figure 1 A schematic structural diagram of an embodiment of an intelligent circuit breaker provided by the present invention;

[0022] Figure 2 A more detailed structural schematic diagram of an intelligent circuit breaker provided by the present invention;

[0023] Figure 3 A schematic diagram of the main process of an embodiment of an intelligent circuit breaker control method provided by the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 The above shows a schematic structural diagram of an embodiment of the intelligent circuit breaker provided by the present invention.

[0026] Combined Figure 2 As shown, in this embodiment, the intelligent circuit breaker includes:

[0027] The circuit breaker body 10 has a main circuit input terminal 11, a main circuit output terminal 12 and a circuit switch 13. The main circuit input terminal 11, the circuit switch 13 and the main circuit output terminal 12 are connected to form a main circuit; the circuit switch 13 is used to control the connection or disconnection between the main circuit input terminal 11 and the main circuit output terminal 12;

[0028] A voltage detection circuit 20, wherein the voltage detection circuit 20 is connected to the main circuit input terminal 11 and the main circuit output terminal 12 respectively; the voltage detection circuit 20 is used to detect the voltage between the main circuit input terminal 11 and the main circuit output terminal 12, and output a voltage detection signal;

[0029] An electric field strength detection circuit 30, which is arranged near the line switch 13; the electric field strength detection circuit 30 is used to detect changes in the electric field strength near the line switch 13 and output an electric field strength detection signal;

[0030] A main control circuit 40, wherein the input end of the main control circuit 40 is respectively connected to the voltage detection circuit 20 and the electric field strength detection circuit 30, and the control end of the main control circuit 40 is connected to the line switch 13;

[0031] The main control circuit 40 is used to control the line switch 13 to disconnect the path between the main circuit input terminal 11 and the main circuit output terminal 12 when it is determined that the line switch 13 is subject to severe pulse interference and / or severe radio frequency interference based on the voltage detection signal and the electric field strength detection signal.

[0032] It is understandable that when lightning strikes the ground near a power line or directly strikes a power line, a strong electromagnetic pulse will be generated. This pulse will propagate along the power line and enter the circuit system where the smart circuit breaker is located, causing pulse interference to the smart circuit breaker. When inductive loads such as motors and transformers are started, stopped or switched, instantaneous high voltage and high current pulses will be generated. These pulses will be transmitted to the smart circuit breaker through the power line, causing pulse interference to it. When multiple wireless devices are working at the same time near the smart circuit breaker, frequency overlap or radio frequency interference may occur, affecting the communication quality and control function of the smart circuit breaker. The microprocessor, digital signal processor and other digital circuits in the smart circuit breaker will generate high-frequency clock signals and data signals when working, causing radio frequency interference to the smart circuit breaker. When the intelligent circuit breaker is subjected to pulse interference and radio frequency interference, the pulse interference and radio frequency interference may cause the line switch 13 in the intelligent circuit breaker to malfunction, resulting in the line switch 13 being unable to open and close normally, and even causing arcs or sparks to be generated between the contacts of the line switch 13, thereby causing the contact surface to be burned and oxidized, causing poor contact, and impacting the mechanical structure of the line switch 13. Long-term exposure to pulse interference and radio frequency interference may also damage the electronic components inside the intelligent circuit breaker, reduce its service life and reliability, and increase the risk of electrical accidents. In order to improve the safety and reliability of the intelligent circuit breaker, the present invention is provided with a voltage detection circuit 20 and an electric field strength detection circuit 30 in the intelligent circuit breaker. The voltage at both ends of the circuit switch 13 is detected by the voltage detection circuit 20, and the electric field strength detection circuit 30 is used to detect the electric field strength of the circuit switch 13. Then, when it is determined that the circuit switch 13 is subject to pulse interference and radio frequency interference according to the voltage at both ends and the electric field strength of the circuit switch 13, the circuit switch 13 is controlled to be disconnected, so as to isolate the interference from other circuit elements in the intelligent circuit breaker, prevent the interference from further affecting other circuit elements in the intelligent circuit breaker, ensure the normal operation of other circuit elements, and improve the safety and reliability of the intelligent circuit breaker.

[0033] In this embodiment, pulse interference usually causes a sharp change in voltage in an instant. For example, pulse interference sources such as lightning pulses and electrostatic discharges will generate high voltage spikes in a very short time. The rise time of the voltage spike is very short, generally rising from normal voltage to thousands of volts or even higher in a few microseconds or even shorter. The voltage detection circuit 20 can quickly respond to such voltage transients to detect sudden increases or decreases in voltage. Therefore, by monitoring the voltage changes at both ends of the line switch 13, when a rapid voltage rise or drop occurs, it can be determined that pulse interference may exist. In this embodiment, the voltage detection circuit 20 detects the voltage at both ends of the line switch 13 to determine the degree to which the line switch 13 is subjected to pulse interference. When working, the radio frequency interference source will emit radio frequency electromagnetic waves, which will generate an electromagnetic field in the surrounding space of the line switch 13. This electromagnetic field will change with the working state of the radio frequency interference source, and its intensity and frequency characteristics reflect the existence and characteristics of radio frequency interference. The electromagnetic field generated by radio frequency interference can be propagated through space radiation, cable conduction, etc. When the radio frequency interference propagates to the vicinity of the intelligent circuit breaker, it will affect the circuit switch 13 and other electronic components inside it, thereby causing equipment failure or performance degradation. The electric field strength detection circuit 30 can respond to the electromagnetic field around the circuit switch 13 and convert it into an electrical signal for output. When radio frequency interference exists, the electric field strength detection circuit 30 will detect the change in electric field strength and output a corresponding signal. Through the analysis and processing of this signal by the main control circuit 40, parameters such as the intensity and frequency of the radio frequency interference can be determined. In this embodiment, the electric field strength detection circuit 30 detects the electric field strength near the circuit switch 13, and the degree of radio frequency interference to the circuit switch 13 can be determined.

[0034] In practical applications, the voltage detection circuit 20 is implemented by a voltage sensor, which is respectively connected to the main circuit input terminal 11 and the main circuit output terminal 12 to detect the voltage between the main circuit input terminal 11 and the main circuit output terminal 12, so as to determine the voltage across the circuit switch 13 and output it to the main control circuit 40 in the form of a voltage detection signal; the electric field strength detection circuit 30 is implemented by an electromagnetic field strength measuring device, which is arranged near the circuit switch 13 to detect the electric field strength near the circuit switch 13 and output it to the main control circuit 40 in the form of an electric field strength detection signal; the main control circuit 40 is implemented by a microprocessor, and is used to determine the actual voltage of the circuit switch 13 according to the voltage detection signal, and to determine the actual electric field strength of the circuit switch 13 according to the electric field strength detection signal; when it is determined that the actual voltage of the circuit switch 13 exceeds the safe voltage, it is determined that the circuit switch 13 is subject to severe pulse interference; when it is determined that the actual electric field strength of the circuit switch 13 exceeds the safe electric field strength, it is determined that the circuit switch 13 is subject to severe radio frequency interference. When it is determined that the line switch 13 is subject to severe pulse interference, or the line switch 13 is subject to severe radio frequency interference, or the line switch 13 is subject to severe pulse interference and severe radio frequency interference at the same time, the main control circuit 40 controls the line switch 13 to disconnect the path between the main circuit input terminal 11 and the main circuit output terminal 12, so as to isolate the line switch 13 from the interference source, and at the same time isolate other circuit elements in the same path as the line switch 13 from the interference source, thereby ensuring the normal operation of other circuit elements and improving the safety and reliability of the intelligent circuit breaker.

[0035] The present invention provides an intelligent circuit breaker and a control method and system thereof. The intelligent circuit breaker includes: a circuit breaker body 10, a voltage detection circuit 20, an electric field strength detection circuit 30 and a main control circuit 40; the circuit breaker body 10 has a main circuit input terminal 11, a main circuit output terminal 12 and a line switch 13, the main circuit input terminal 11, the line switch 13 and the main circuit output terminal 12 are connected to form a main circuit, the voltage detection circuit 20 is respectively connected to the main circuit input terminal 11 and the main circuit output terminal 12, the electric field strength detection circuit 30 is arranged at a position close to the line switch 13, the input terminal of the main control circuit 40 is respectively connected to the voltage detection circuit 20 and the electric field strength detection circuit 30, and the control terminal of the main control circuit 40 is connected to the line switch 13. In practical applications, the circuit switch 13 is used to control the connection or disconnection between the main circuit input terminal 11 and the main circuit output terminal 12; the voltage detection circuit 20 is used to detect the voltage between the main circuit input terminal 11 and the main circuit output terminal 12, and output a voltage detection signal; the electric field strength detection circuit 30 is used to detect the change of the electric field strength near the circuit switch 13, and output an electric field strength detection signal; the main control circuit 40 is used to control the circuit switch 13 to disconnect the path between the main circuit input terminal 11 and the main circuit output terminal 12 when it is determined that the circuit switch 13 is subject to severe pulse interference and / or severe radio frequency interference according to the voltage detection signal and the electric field strength detection signal. When the present invention determines that the circuit switch 13 is subject to pulse interference and radio frequency interference through the voltage detection circuit 20 and the electric field strength detection circuit 30, the circuit switch 13 is controlled to be disconnected to isolate the interference from other circuit elements in the intelligent circuit breaker, thereby improving the safety and reliability of the intelligent circuit breaker.

[0036] In one embodiment, referring to Figure 1 The main control circuit 40 is specifically used to determine the actual voltage of the line switch 13 according to the voltage detection signal, compare the actual voltage with the first preset voltage, and determine that the line switch 13 is subject to severe pulse interference when the actual voltage exceeds the first preset voltage; and determine the actual electric field strength of the line switch 13 according to the electric field strength detection signal, compare the actual electric field strength with the first electric field strength, and determine that the line switch 13 is subject to severe radio frequency interference when the actual electric field strength exceeds the first electric field strength.

[0037] It can be understood that the rated voltage of the intelligent circuit breaker is 220V, and the safe voltage range is usually within ±10% of the rated voltage, so the first preset voltage in this embodiment is set to 300V. In practical applications, the voltage detection circuit 20 detects the voltage across the line switch 13 and outputs a voltage detection signal. When the main control circuit 40 determines that the voltage across the line switch 13 reaches 300V or higher based on the voltage detection signal, it can be considered that the pulse interference is relatively serious. The safe electric field strength range is usually within 50V / m, so the first electric field strength in this embodiment is 50V / m. In practical applications, the electric field strength detection circuit 30 detects the change of the electric field strength near the line switch 13 and outputs an electric field strength detection signal. When the main control circuit 40 determines that the electric field strength near the line switch 13 reaches 50V / m or higher based on the electric field strength detection signal, it can be considered that the radio frequency interference is relatively serious.

[0038] In one embodiment, referring to Figure 1 , the main control circuit 40 is further used to compare the actual voltage with a second preset voltage, and when the actual voltage exceeds the second preset voltage, determine that the line switch 13 is subject to lower pulse interference; and,

[0039] The actual electric field strength of the line switch 13 is determined according to the electric field strength detection signal, and the actual electric field strength is compared with the second electric field strength. When the actual electric field strength exceeds the second electric field strength, it is determined that the line switch 13 is subject to lower radio frequency interference.

[0040] It can be understood that, in this embodiment, the second preset voltage is set to 250V, the voltage detection circuit 20 detects the voltage across the line switch 13 and outputs a voltage detection signal, and when the main control circuit 40 determines that the voltage across the line switch 13 reaches 250V according to the voltage detection signal, it can be considered that there is a certain degree of pulse interference, that is, the line switch 13 is subject to relatively low pulse interference; the second electric field strength is set to 10V / m, the electric field strength detection circuit 30 detects the change of the electric field strength near the line switch 13 and outputs an electric field strength detection signal, and when the main control circuit 40 determines that the electric field strength near the line switch 13 reaches 10V / m according to the electric field strength detection signal, it can be considered that there is a certain degree of radio frequency interference, that is, the line switch 13 is subject to relatively low radio frequency interference.

[0041] In one embodiment, a voltage value of the first preset voltage is greater than a voltage value of the second preset voltage, and an electric field strength value of the first electric field strength is greater than an electric field strength value of the second electric field strength.

[0042] It can be understood that, in this embodiment, the voltage value of the first preset voltage is greater than the voltage value of the second preset voltage. When the voltage at both ends of the line switch 13 reaches the second preset voltage but does not exceed the first preset voltage, it can be considered that there is a certain degree of pulse interference. When the line switch 13 is subjected to relatively low pulse interference, the main control circuit 40 does not directly control the line switch 13 to disconnect, but takes corresponding measures to filter out the pulse interference, for example, starting the transient voltage suppression circuit, or starting the low-pass filter circuit, or starting the buffer circuit, so as to maintain the normal use of the line switch 13; the electric field strength value of the first electric field strength is greater than the electric field strength value of the second electric field strength, and the electric field strength near the line switch 13 reaches the second electric field strength but does not exceed the first electric field strength, it can be considered that there is a certain degree of radio frequency interference. When the line switch 13 is subjected to relatively low radio frequency interference, the main control circuit 40 does not directly control the line switch 13 to disconnect, but takes corresponding measures to filter out the radio frequency interference, for example, starting the radio frequency filter circuit 60, or starting the balancing circuit, so as to maintain the normal use of the line switch 13.

[0043] In one embodiment, referring to Figure 2 , the intelligent circuit breaker also includes:

[0044] A pulse filter circuit 50, wherein a controlled end of the pulse filter circuit 50 is connected to the main control circuit 40, and the pulse filter circuit 50 is respectively connected to the main circuit input end 11 and the main circuit output end 12;

[0045] The main control circuit 40 is further configured to control the pulse filtering circuit 50 to filter out the pulse interference between the main circuit input terminal 11 and the main circuit output terminal 12 when it is determined that the line switch 13 is subject to relatively low pulse interference.

[0046] It can be understood that, in this embodiment, the pulse filter circuit 50 is implemented by a low-pass filter, one end of the low-pass filter is connected to the main circuit input terminal 11, and the other end is connected to the main circuit output terminal 12. Through the connection method of this embodiment, the high-frequency pulse interference signal at both ends of the line switch 13 can be shunted to the low-pass filter, thereby reducing the interference voltage at both ends of the line switch 13. Specifically, when the main control circuit 40 determines that the line switch 13 is subject to pulse interference, the low-pass filter is started. At this time, a part of the interference current forms a loop through the low-pass filter, so that the low-pass filter reduces the pulse interference voltage at both ends of the line switch 13, thereby filtering out the pulse interference between the main circuit input terminal 11 and the main circuit output terminal 12, and reducing the impact on the line switch 13.

[0047] In other embodiments, the pulse filtering circuit 50 may also be implemented by a transient voltage suppression circuit or a startup buffer circuit, which reduces the pulse interference voltage across the line switch 13 to maintain normal use of the line switch 13.

[0048] In one embodiment, referring to Figure 2 , the intelligent circuit breaker also includes:

[0049] A radio frequency filter circuit 60, wherein a controlled end of the radio frequency filter circuit 60 is connected to the main control circuit 40, and the radio frequency filter circuit 60 is respectively connected to the main loop input end 11 and the main loop output end 12;

[0050] The main control circuit 40 is further configured to control the radio frequency filter circuit 60 to filter out the radio frequency interference between the main loop input terminal 11 and the main loop output terminal 12 when it is determined that the line switch 13 is subject to relatively low radio frequency interference.

[0051] It can be understood that, in this embodiment, the RF filter circuit 60 is implemented by a RF filter, one end of the RF filter is connected to the main circuit input terminal 11, and the other end is connected to the main circuit output terminal 12. The connection method of this embodiment can provide a low-impedance bypass path for RF interference, shunt the interference signal to the filter, thereby reducing the impact on the line switch 13. Specifically, when the main control circuit 40 determines that the line switch 13 is subject to RF interference, the RF filter is started, and the RF filter connected in parallel with the line switch 13 can guide part of the interference current to the ground, reduce the RF interference voltage at both ends of the line switch 13, thereby filtering out the RF interference between the main circuit input terminal 11 and the main circuit output terminal 12, and reducing the impact on the line switch 13.

[0052] In other embodiments, the RF filter circuit 60 may also be implemented by a balanced circuit, which reduces the RF interference voltage at both ends of the line switch 13 , thereby maintaining the normal use of the line switch 13 .

[0053] In one embodiment, referring to Figure 2 , the intelligent circuit breaker also includes:

[0054] A communication circuit 70, the communication circuit 70 is used to connect to a remote terminal, the communication circuit 70 is connected to the main control circuit 40; the communication circuit 70 is used to establish a connection path between the remote terminal and the main control circuit 40;

[0055] The main control circuit 40 is further used to send the voltage detection signal and the electric field strength detection signal to the remote terminal through the communication circuit 70, so that the remote terminal can perform data statistics on the voltage detection signal and the electric field strength detection signal.

[0056] It can be understood that in this embodiment, the remote terminal can be located far away from the installation site of the intelligent circuit breaker, and communicate with the intelligent circuit breaker through wireless communication technology to realize remote management of the intelligent circuit breaker. The remote terminal is mainly used for data analysis, remote monitoring and centralized management of the intelligent circuit breaker. In the application of multiple intelligent circuit breakers, the remote terminal can conduct a comprehensive analysis of the operating data of multiple intelligent circuit breakers to provide decision support for equipment maintenance and management. In actual applications, the communication circuit 70 is implemented by wireless communication equipment, and the main control circuit 40 sends the voltage data corresponding to the voltage detection signal and the electric field strength data corresponding to the electric field strength detection signal to the remote terminal through the wireless communication equipment, and the remote terminal performs data analysis and remote monitoring on the received voltage data and electric field strength data.

[0057] In one embodiment, referring to Figure 2 , the communication circuit 70 is also used to connect to the local terminal; the communication circuit 70 is also used to establish a connection path between the local terminal and the main control circuit 40;

[0058] The main control circuit 40 is also used to send the voltage detection signal and the electric field strength detection signal to the local terminal through the communication circuit 70, and receive the control instruction sent by the local terminal through the communication circuit 70, and control the line switch 13 to connect or disconnect the path between the main circuit input terminal 11 and the main circuit output terminal 12 according to the control instruction.

[0059] It is understandable that in this embodiment, the local terminal is located near the installation site of the intelligent circuit breaker, and the local terminal can display various operating parameters of the intelligent circuit breaker in real time, such as current, voltage, power, temperature, etc. Through the intuitive interface, the user can understand the working status of the intelligent circuit breaker at any time and find abnormal conditions in time. The local terminal provides control functions for the intelligent circuit breaker, and the user can perform the opening and closing operations of the circuit breaker, parameter settings, etc. through the local terminal. The local terminal usually has more direct operation and control functions than the remote terminal, and is suitable for emergency processing and debugging on site, and is used to quickly control the intelligent circuit breaker.

[0060] In actual applications, the communication device is directly connected to the main control circuit 40 through a connecting line. The main control circuit 40 sends the voltage data corresponding to the voltage detection signal, the electric field strength data corresponding to the electric field strength detection signal, and other data information to the local terminal through the communication device. The local terminal displays various operating parameters of the intelligent circuit breaker according to the received data information, such as pulse voltage, radio frequency voltage, current, power, etc. The user can understand the pulse interference and radio frequency interference of the intelligent circuit breaker at any time. When a power failure occurs, the on-site staff can send a control command to the wireless communication device of the intelligent circuit breaker at the local terminal, and the communication circuit 70 transmits the control command to the main control circuit 40. The main control circuit 40 quickly disconnects the line switch 13 according to the control command, thereby protecting the safety of equipment and personnel.

[0061] like Figure 3 As shown, a schematic diagram of the main process of an embodiment of an intelligent circuit breaker control method provided by the present invention is shown. In this embodiment, the intelligent circuit breaker includes a circuit breaker body 10, a voltage detection circuit 20 and an electric field strength detection circuit 30. The circuit breaker body 10 has a main circuit input terminal 11, a main circuit output terminal 12 and a line switch 13. The main circuit input terminal 11, the line switch 13 and the main circuit output terminal 12 are connected to form a main circuit. The line switch 13 is used to control the connection or disconnection between the main circuit input terminal 11 and the main circuit output terminal 12. Figure 1 , Figure 2 , the method comprising:

[0062] Step S100, detecting the voltage between the main circuit input terminal 11 and the main circuit output terminal 12 through the voltage detection circuit 20, and obtaining a voltage detection signal output by the voltage detection circuit 20;

[0063] Step S200, detecting the change of the electric field strength near the line switch 13 by the electric field strength detection circuit 30, and obtaining the electric field strength detection signal output by the electric field strength detection circuit 30;

[0064] Step S300: When it is determined that the line switch 13 is subject to severe pulse interference and / or severe radio frequency interference according to the voltage detection signal and the electric field strength detection signal, the line switch 13 is controlled to disconnect the path between the main circuit input terminal 11 and the main circuit output terminal 12.

[0065] It is understandable that when the smart circuit breaker is subjected to pulse interference and radio frequency interference, the pulse interference and radio frequency interference may cause the line switch 13 in the smart circuit breaker to malfunction, resulting in the line switch 13 being unable to open and close normally, and even causing arcs or sparks between the contacts of the line switch 13, thereby causing the contact surface to be burned and oxidized, causing poor contact, and impacting the mechanical structure of the line switch 13. Long-term exposure to pulse interference and radio frequency interference may also damage the electronic components inside the smart circuit breaker, reduce its service life and reliability, and increase the risk of electrical accidents. In order to improve the safety and reliability of the intelligent circuit breaker, the present invention is provided with a voltage detection circuit 20 and an electric field strength detection circuit 30 in the intelligent circuit breaker. The voltage at both ends of the line switch 13 is detected by the voltage detection circuit 20, and the electric field strength detection circuit 30 is used to detect the electric field strength of the line switch 13. When the main control circuit 40 determines that the line switch 13 is subject to pulse interference and radio frequency interference according to the voltage at both ends and the electric field strength of the line switch 13, the line switch 13 is controlled to be disconnected to isolate the pulse interference and radio frequency interference from other circuit elements in the intelligent circuit breaker, prevent the pulse interference and radio frequency interference from further affecting other circuit elements in the intelligent circuit breaker, ensure the normal operation of other circuit elements, and improve the safety and reliability of the intelligent circuit breaker.

[0066] The present invention also proposes an intelligent circuit breaker system, referring to Figure 1 and Figure 2 The intelligent circuit breaker system includes a local terminal, a remote terminal and the intelligent circuit breaker as described in the above embodiment. The specific structure of the intelligent circuit breaker system refers to the above embodiment. Since the intelligent circuit breaker system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0067] The implementation of the embodiments of the present invention has the following beneficial effects:

[0068] The present invention provides an intelligent circuit breaker and a control method and system thereof. The voltage and electric field strength of a line switch are monitored in real time through a voltage detection circuit and an electric field strength detection circuit. Once severe pulse interference or radio frequency interference is detected, the line switch is immediately controlled to disconnect, thereby effectively isolating the interference source, protecting the intelligent circuit breaker and other circuit elements from damage, and improving the overall safety and reliability of the system.

[0069] At the same time, the present invention not only disconnects the line switch when severe interference is detected, but also filters out interference by starting a pulse filtering circuit or a radio frequency filtering circuit when a lower degree of interference is detected, thereby achieving multi-level protection, reducing false operations and failures caused by interference, and extending the service life of the intelligent circuit breaker.

[0070] In addition, in the present invention, by connecting the remote terminal through the communication circuit, remote monitoring and management of the intelligent circuit breaker can be realized, and voltage and electric field strength data can be obtained in real time, and data statistics and analysis can be performed to provide decision support for equipment maintenance and management, thereby improving management efficiency.

[0071] The communication circuit of the present invention also supports connection to a local terminal, allowing on-site staff to view the operating parameters of the intelligent circuit breaker in real time and send control instructions through the local terminal when necessary, thereby achieving rapid response and emergency processing, thereby improving the flexibility and emergency processing capabilities of the system.

[0072] The present invention is particularly suitable for complex electromagnetic environments, can effectively resist interference from other electrical equipment, ensure the stable operation of the intelligent circuit breaker under various harsh conditions, and improve the adaptability and reliability of the system.

[0073] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0074] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0075] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An intelligent circuit breaker, characterized in that: The intelligent circuit breaker comprises: The circuit breaker body has a main circuit input terminal, a main circuit output terminal and a circuit switch, and the main circuit input terminal, the circuit switch and the main circuit output terminal are connected to form a main circuit; the circuit switch is used to control the connection or disconnection between the main circuit input terminal and the main circuit output terminal; A voltage detection circuit, which is connected to the main circuit input end and the main circuit output end respectively; the voltage detection circuit is used to detect the voltage between the main circuit input end and the main circuit output end, and output a voltage detection signal; An electric field strength detection circuit is arranged near the line switch; the electric field strength detection circuit is used to detect changes in the electric field strength near the line switch and output an electric field strength detection signal; A main control circuit, whose input end is respectively connected to the voltage detection circuit and the electric field strength detection circuit, and a control end of the main control circuit is connected to the line switch; Wherein, the main control circuit is used to control the line switch to disconnect the path between the main circuit input terminal and the main circuit output terminal when it is determined that the line switch is subject to severe pulse interference and / or severe radio frequency interference based on the voltage detection signal and the electric field strength detection signal.

2. The intelligent circuit breaker according to claim 1, characterized in that: The main control circuit is specifically used to determine the actual voltage of the line switch according to the voltage detection signal, compare the actual voltage with a first preset voltage, and determine that the line switch is subject to severe pulse interference when the actual voltage exceeds the first preset voltage; as well as, The actual electric field strength of the line switch is determined according to the electric field strength detection signal, and the actual electric field strength is compared with the first electric field strength. When the actual electric field strength exceeds the first electric field strength, it is determined that the line switch is subject to severe radio frequency interference.

3. The intelligent circuit breaker according to claim 2, characterized in that: The main control circuit is further used to compare the actual voltage with a second preset voltage, and when the actual voltage exceeds the second preset voltage, determine that the line switch is subject to lower pulse interference; as well as, The actual electric field strength of the line switch is determined according to the electric field strength detection signal, and the actual electric field strength is compared with a second electric field strength. When the actual electric field strength exceeds the second electric field strength, it is determined that the line switch is subject to lower radio frequency interference.

4. The intelligent circuit breaker according to claim 3, characterized in that: The voltage value of the first preset voltage is greater than the voltage value of the second preset voltage, and the electric field strength value of the first electric field strength is greater than the electric field strength value of the second electric field strength.

5. The intelligent circuit breaker according to claim 2, characterized in that: The intelligent circuit breaker also includes: A pulse filter circuit, wherein a controlled end of the pulse filter circuit is connected to the main control circuit, and the pulse filter circuit is respectively connected to the main circuit input end and the main circuit output end; The main control circuit is further used to control the pulse filter circuit to filter out the pulse interference between the main circuit input end and the main circuit output end when it is determined that the line switch is subject to lower pulse interference.

6. The intelligent circuit breaker according to claim 2, characterized in that: The intelligent circuit breaker also includes: A radio frequency filter circuit, wherein a controlled end of the radio frequency filter circuit is connected to the main control circuit, and the radio frequency filter circuit is respectively connected to the main loop input end and the main loop output end; The main control circuit is further used to control the radio frequency filter circuit to filter out the radio frequency interference between the main loop input end and the main loop output end when it is determined that the line switch is subject to relatively low radio frequency interference.

7. The intelligent circuit breaker according to claim 1, characterized in that: The intelligent circuit breaker also includes: A communication circuit, the communication circuit is used to connect to a remote terminal, the communication circuit is connected to the main control circuit; the communication circuit is used to establish a connection path between the remote terminal and the main control circuit; The main control circuit is also used to send the voltage detection signal and the electric field strength detection signal to the remote terminal through the communication circuit, so that the remote terminal can perform data statistics on the voltage detection signal and the electric field strength detection signal.

8. The intelligent circuit breaker according to claim 7, characterized in that: The communication circuit is also used to connect to a local terminal; the communication circuit is also used to establish a connection path between the local terminal and the main control circuit; The main control circuit is also used to send the voltage detection signal and the electric field strength detection signal to the local terminal through the communication circuit, and receive the control instruction sent by the local terminal through the communication circuit, and control the line switch to connect or disconnect the path between the main circuit input end and the main circuit output end according to the control instruction.

9. An intelligent circuit breaker control method, characterized in that: The method is implemented by using the intelligent circuit breaker according to any one of claims 1 to 8, and the method comprises the following steps: Step S100, detecting the voltage between the main circuit input terminal and the main circuit output terminal through a voltage detection circuit, and obtaining a voltage detection signal output by the voltage detection circuit; Step S200, detecting a change in electric field strength near the line switch through an electric field strength detection circuit, and acquiring an electric field strength detection signal output by the electric field strength detection circuit; Step S300: When it is determined that the line switch is subject to severe pulse interference and / or severe radio frequency interference according to the voltage detection signal and the electric field strength detection signal, the line switch is controlled to disconnect the path between the main circuit input terminal and the main circuit output terminal.

10. An intelligent circuit breaker system, characterized in that: The intelligent circuit breaker system comprises a local terminal, a remote terminal and the intelligent circuit breaker according to any one of claims 1 to 8.

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