Design method for preventing closing coil of vacuum circuit breaker from being burnt

Abstract

The invention discloses a design method for preventing a closing coil of a vacuum circuit breaker from being burnt, which is characterized in that a protection device comprising a Hall current sensor H and an intelligent control component CIED is additionally arranged in a closing loop of the vacuum circuit breaker, so that the current of the closing coil is monitored in real time and intelligently controlled; the problem of coil burnout caused by long-time power-on or abnormal conditions is effectively prevented, the reliability and the safety of equipment are improved, the intelligent control assembly CIED is arranged and can record the current state, the fault occurrence time and the processing measures of the closing coil, and the reliability and the safety of the equipment are improved. Important data support is provided for subsequent fault analysis and system optimization, the operation and maintenance efficiency and the overall performance of equipment are improved, after a closing coil power supply is cut off, the intelligent control assembly CIED sends alarm information to a system operator or a remote monitoring center in time, the fault response time is shortened, and the fault diagnosis efficiency is improved. And power failure time and economic loss caused by faults are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent high-voltage vacuum circuit breaker equipment, and in particular to a design method for preventing a closing coil of a vacuum circuit breaker from burning out. Background Art

[0002] With the continuous advancement of the national smart grid construction, the power system has increasingly higher requirements for power reliability and quality. Smart grid aims to achieve intelligent, automated and efficient operation of the power grid by integrating advanced communication technology, information technology and control technology. In this context, the reliability, safety and intelligence level of distribution equipment, as an important part of the smart grid, have become the focus of attention. In particular, higher requirements are put forward for distribution equipment in terms of ensuring the reliability of power supply, improving power supply quality, improving equipment management and improving work efficiency.

[0003] As a switchgear widely used in high-voltage power distribution systems, vacuum circuit breakers have the advantages of strong arc extinguishing ability, low maintenance and long service life, and play an important role in power systems. Traditional high-voltage vacuum circuit breakers control the on and off of the closing coil through the closing circuit, thereby realizing the closing and opening operations of the circuit breaker. The closing circuit contains multiple electrical components, such as travel switches, micro switches, transfer switches and closing coils, which work together to ensure the correct operation of the circuit breaker.

[0004] The above technology has the following shortcomings: the characteristics of the closing coil of the vacuum circuit breaker require that it cannot be energized for a long time. Once it is energized for a long time, the temperature of the coil will rise rapidly and may exceed its heat resistance limit, thus causing burning. This will not only cause equipment damage, but may also cause more serious power system failures, affecting the reliability and safety of power supply. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a design method to prevent the closing coil of a vacuum circuit breaker from burning out, which solves the problem that the closing coil of a vacuum circuit breaker cannot be energized for a long time. Once energized for a long time, the temperature of the coil will rise rapidly and may exceed its heat resistance limit, thus causing the burning phenomenon. This will not only cause equipment damage, but may also cause more serious power system failures, affecting the reliability and safety of power supply.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A design method for preventing a vacuum circuit breaker closing coil from burning out, the method comprising the following steps:

[0008] (a) A protection device including a Hall current sensor H and an intelligent control component CIED is added to the closing circuit of the vacuum circuit breaker. The intelligent control component CIED is equipped with a relay KM and a corresponding normally closed contact KM-1 for controlling the on and off of the closing coil. The CPU of the CIED device adopts an AMD F series chip to realize intelligent control.

[0009] (b) Start the Hall current sensor H to monitor the current state of the closing coil in real time and accurately, and transmit the current signal to the intelligent control component CIED in real time;

[0010] (c) The intelligent control component CIED quickly determines the current state of the closing coil based on the received current signal through the built-in algorithm, and controls the action of the relay KM, thereby controlling the on / off state of the normally closed contact KM-1 to achieve real-time protection for the closing coil;

[0011] (d) When the closing coil is energized and the timing starts, if the current of the closing coil has not returned to zero after the preset time, the intelligent control component CIED determines it as an abnormal state and immediately controls the relay KM to operate, disconnect the normally closed contact KM-1, cut off the power supply of the closing coil, and prevent the coil from burning;

[0012] (e) After the power supply of the closing coil is cut off, the intelligent control component CIED automatically controls the relay KM to reset at a fixed time, so that the normally closed contact KM-1 returns to the closed state for the next normal closing operation;

[0013] (f) The method also includes a function of providing a reminder or automatic execution of aging detection and regular maintenance of other key electrical components in the closing circuit to further reduce the risk of burning of the closing coil and the entire circuit due to aging or failure.

[0014] By adopting the above technical solution, a protection device including a Hall current sensor H and an intelligent control component CIED is added to the closing circuit of the vacuum circuit breaker, so that real-time monitoring and intelligent control of the closing coil current are achieved, which effectively prevents the coil from burning out due to long-term power-on or abnormal conditions, and improves the reliability and safety of the equipment.

[0015] Preferably, the intelligent control component CIED also has the function of recording the current state of the closing coil, the time of fault occurrence and the treatment measures.

[0016] By adopting the above technical solution and setting up the intelligent control component CIED, the intelligent control component CIED can record the current state of the closing coil, the time of fault occurrence and the handling measures, providing important data support for subsequent fault analysis and system optimization, and helping to improve the operation and maintenance efficiency and overall performance of the equipment.

[0017] Preferably, the method further comprises sending an alarm message to a system operator or a remote monitoring center after cutting off the power supply of the closing coil, so as to notify in real time of possible abnormality or failure of the closing coil.

[0018] By adopting the above technical solution, after cutting off the power supply of the closing coil, the intelligent control component CIED promptly sends alarm information to the system operator or the remote monitoring center, which can quickly notify relevant personnel of possible abnormalities or faults of the closing coil, shorten the fault response time, and reduce the power outage time and economic losses caused by the fault.

[0019] Preferably, the method is applicable to vacuum circuit breakers of various models and specifications, and achieves compatibility and interchangeability between different devices through standardized interfaces and configurations.

[0020] By adopting the above technical solution and through standardized interfaces and configurations, this design method is applicable to vacuum circuit breakers of various models and specifications, achieving compatibility and interchangeability between different devices and reducing the difficulty and cost of equipment upgrades and maintenance.

[0021] Preferably, adjustable current threshold and timing parameters are set in the intelligent control component CIED.

[0022] By adopting the above technical solution and setting adjustable current thresholds and timing parameters, it is possible to adjust the different requirements of closing coil protection under different working conditions, thereby improving the adaptability and flexibility of the protection device and better meeting the protection requirements in different scenarios.

[0023] Preferably, the intelligent control component CIED is integrated with a self-diagnosis function.

[0024] By adopting the above technical solution and setting the self-diagnosis function, the self-diagnosis function integrated in the intelligent control component CIED can automatically detect the operating status of its own hardware and software, discover and deal with potential problems in a timely manner, ensure the reliability and stability of the protection device, and reduce system downtime caused by equipment failure.

[0025] Preferably, the Hall current sensor H and the intelligent control component CIED both have high anti-interference capability and protection level.

[0026] By adopting the above technical solution, the high anti-interference ability and protection level of the Hall current sensor H and the intelligent control component CIED can ensure normal operation in harsh power environments, thereby improving the environmental adaptability and working stability of the equipment.

[0027] Preferably, the intelligent control component CIED integrates remote monitoring and communication functions.

[0028] By adopting the above technical solutions and setting up remote monitoring and communication functions, remote monitoring, fault diagnosis and preventive maintenance of the closing coil are realized, which improves the intelligence level and operation and maintenance efficiency of the power distribution system. Operation and maintenance personnel can remotely obtain real-time status information of the equipment, discover and deal with potential problems in a timely manner, and reduce the frequency and cost of on-site inspections.

[0029] In summary, the present invention mainly has the following beneficial effects:

[0030] By adding a protection device including a Hall current sensor H and an intelligent control component CIED in the closing circuit of the vacuum circuit breaker, real-time monitoring and intelligent control of the closing coil current are achieved, effectively preventing the coil from burning out due to long-term power-on or abnormal conditions, and improving the reliability and safety of the equipment.

[0031] After cutting off the power supply of the closing coil, the intelligent control component CIED promptly sends alarm information to the system operator or remote monitoring center, which can quickly inform relevant personnel of possible abnormal or faulty closing coil conditions, shorten fault response time, and reduce power outage time and economic losses caused by faults. Through standardized interfaces and configurations, this design method is applicable to vacuum circuit breakers of various models and specifications, achieving compatibility and interchangeability between different devices, reducing the difficulty and cost of equipment upgrades and maintenance. By setting adjustable current thresholds and timing parameters, it can adjust the closing coil protection according to different requirements under different working conditions, improve the adaptability and flexibility of the protection device, and better meet the needs of different To meet the protection needs in the scenario, by setting the self-diagnosis function, the self-diagnosis function integrated in the intelligent control component CIED can automatically detect the operating status of its own hardware and software, timely discover and deal with potential problems, ensure the reliability and stability of the protection device, and reduce the system downtime caused by equipment failure. The high anti-interference ability and protection level of the Hall current sensor H and the intelligent control component CIED ensure that it can still work normally in harsh power environments, improve the environmental adaptability and working stability of the equipment, and realize remote monitoring, fault diagnosis and preventive maintenance of the closing coil by setting remote monitoring and communication functions, thereby improving the intelligence level and operation and maintenance efficiency of the power distribution system. Operation and maintenance personnel can remotely obtain real-time status information of the equipment, timely discover and deal with potential problems, and reduce the frequency and cost of on-site inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the closing circuit of a traditional high-voltage vacuum circuit breaker;

[0033] Figure 2 It is the closing circuit diagram after optimization of the present invention;

[0034] Figure 3It is a software design flow chart of the closing coil protection of the present invention. DETAILED DESCRIPTION

[0035] 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.

[0036] refer to Figure 1 , Figure 2 and Figure 3 , a design method for preventing the closing coil of a vacuum circuit breaker from burning out, the method comprising the following steps: (a) adding a protection device including a Hall current sensor H and an intelligent control component CIED in the closing circuit of the vacuum circuit breaker, wherein the intelligent control component CIED has a built-in relay KM and a corresponding normally closed contact KM-1 for controlling the on and off of the closing coil, and the CPU of the CIED device adopts an AMD F series chip to realize intelligent control;

[0037] (b) Start the Hall current sensor H to monitor the current state of the closing coil in real time and accurately, and transmit the current signal to the intelligent control component CIED in real time;

[0038] (c) The intelligent control component CIED quickly determines the current state of the closing coil based on the received current signal through the built-in algorithm, and controls the action of the relay KM, thereby controlling the on / off state of the normally closed contact KM-1 to achieve real-time protection for the closing coil;

[0039] (d) When the closing coil is energized and the timing starts, if the current of the closing coil has not returned to zero after the preset time, the intelligent control component CIED determines it as an abnormal state and immediately controls the relay KM to operate, disconnect the normally closed contact KM-1, cut off the power supply of the closing coil, and prevent the coil from burning;

[0040] (e) After the power supply of the closing coil is cut off, the intelligent control component CIED automatically controls the relay KM to reset at a fixed time, so that the normally closed contact KM-1 returns to the closed state for the next normal closing operation;

[0041] (f) The method also includes a function of providing a reminder or automatic execution of aging detection and regular maintenance of other key electrical components in the closing circuit to further reduce the risk of burning of the closing coil and the entire circuit due to aging or failure.

[0042] refer to Figure 1 , Figure 2 and Figure 3The intelligent control component CIED also has the function of recording the current state of the closing coil, the time of the fault and the treatment measures, so as to facilitate the subsequent fault analysis and system optimization. The method also includes sending an alarm message to the system operator or the remote monitoring center after cutting off the power supply of the closing coil to notify the closing coil abnormality or fault in real time. The method is applicable to vacuum circuit breakers of various models and specifications, and achieves compatibility and interchangeability between different devices through standardized interfaces and configurations. The intelligent control component CIED is set with adjustable current thresholds and timing parameters, and the intelligent control component CIED is integrated with a self-diagnosis function. The Hall current sensor H and the intelligent control component CIED both have high anti-interference capabilities and protection levels, and the intelligent control component CIED is integrated with remote monitoring and communication functions.

[0043] Working principle: Please refer to Figure 1-Figure 3 As shown, when in use, before the circuit breaker is closed, the energy storage spring completes energy storage through a motor or other mechanical device. When the energy storage is completed, the energy storage microswitch S1 is closed to provide the necessary energy storage conditions for the closing operation. When the closing command is received, the control power supply (usually DC220V) is instantly connected to the closing coil circuit through external contacts such as CT4, CT14 or CT42, CT14, so that the closing coil HQ is energized. The intelligent control component CIED device monitors the current state of the closing coil in real time through the Hall current sensor H. Once the closing coil is energized, the intelligent control component starts timing and records current data. The moving iron core in the closing coil HQ starts to move under the action of electromagnetic force, hitting the energy storage holding plate or other mechanical parts of the circuit breaker, thereby releasing the energy of the energy storage spring. As the energy of the energy storage spring is released, the main contacts of the circuit breaker close quickly to complete the closing operation. After the closing is completed, the conversion The switch QF changes from the closed state to the open state, cutting off the power supply of the closing coil to ensure that the closing coil will not be energized for a long time. The intelligent control component CIED device continuously monitors the current state of the closing coil and makes intelligent judgments based on the preset current threshold and timing parameters. If the current of the closing coil fails to drop to zero within the set time, it is judged as an abnormal situation. Once an abnormal situation is detected, the intelligent control component CIED will quickly control the relay KM to operate, so that the normally closed contact KM-1 changes from a closed point to an open point, and cuts off the power supply of the closing coil to prevent it from being energized for a long time and causing burning. At the same time, the intelligent control component will also record the fault information and send an alarm message to the system operator or the remote monitoring center. After cutting off the power supply of the closing coil, the intelligent control component CIED will wait for a period of time and then control the relay KM to reset, so that the normally closed contact KM-1 returns to the normally closed state, preparing for the next closing operation.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A design method for preventing the closing coil of a vacuum circuit breaker from burning out, characterized in that: The method comprises the following steps: (a) A protection device including a Hall current sensor H and an intelligent control component CIED is added to the closing circuit of the vacuum circuit breaker. The intelligent control component CIED is equipped with a relay KM and a corresponding normally closed contact KM-1 for controlling the on and off of the closing coil. The CPU of the CIED device adopts an AMD F series chip to realize intelligent control. (b) Start the Hall current sensor H to monitor the current state of the closing coil in real time and accurately, and transmit the current signal to the intelligent control component CIED in real time; (c) The intelligent control component CIED quickly determines the current state of the closing coil based on the received current signal through the built-in algorithm, and controls the action of the relay KM, thereby controlling the on / off state of the normally closed contact KM-1 to achieve real-time protection for the closing coil; (d) When the closing coil is energized and the timing starts, if the current of the closing coil has not returned to zero after the preset time, the intelligent control component CIED determines it as an abnormal state and immediately controls the relay KM to operate, disconnect the normally closed contact KM-1, cut off the power supply of the closing coil, and prevent the coil from burning; (e) After the power supply of the closing coil is cut off, the intelligent control component CIED automatically controls the relay KM to reset at a fixed time, so that the normally closed contact KM-1 returns to the closed state for the next normal closing operation; (f) The method also includes a function of providing a reminder or automatic execution of aging detection and regular maintenance of other key electrical components in the closing circuit to further reduce the risk of burning of the closing coil and the entire circuit due to aging or failure.

2. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The intelligent control component CIED also has the function of recording the current state of the closing coil, the time of fault occurrence and the treatment measures, so as to facilitate the subsequent fault analysis and system optimization.

3. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The method also includes sending an alarm message to a system operator or a remote monitoring center after cutting off the power supply of the closing coil, so as to notify in real time of a possible abnormality or failure of the closing coil.

4. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The method is applicable to vacuum circuit breakers of various models and specifications, and achieves compatibility and interchangeability between different devices through standardized interfaces and configurations.

5. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The intelligent control component CIED is provided with adjustable current threshold and timing parameters.

6. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The intelligent control component CIED has an integrated self-diagnosis function.

7. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The Hall current sensor H and the intelligent control component CIED both have high anti-interference capability and protection level.

8. A design method for preventing the closing coil of a vacuum circuit breaker from burning out according to claim 1, characterized in that: The intelligent control component CIED integrates remote monitoring and communication functions.

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