CN111366843B - Circuit breaker device and switching-on/off detection method and device - Google Patents
Circuit breaker device and switching-on/off detection method and device Download PDFInfo
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- CN111366843B CN111366843B CN201811602871.5A CN201811602871A CN111366843B CN 111366843 B CN111366843 B CN 111366843B CN 201811602871 A CN201811602871 A CN 201811602871A CN 111366843 B CN111366843 B CN 111366843B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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Abstract
The invention relates to a circuit breaker device and a method and a device for detecting opening and closing, wherein the method comprises the following steps: detecting the opening and closing positions of the circuit breakers by adopting N detection processes of the opening and closing positions of the circuit breakers, wherein N is more than or equal to 3; acquiring the breaker opening and closing position information detected in the opening and closing position detection process of each breaker to obtain N pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the breaker opening and closing position information with the number being greater than N/2 as the opening and closing position of the breaker. According to the invention, the switching-on and switching-off positions of the circuit breaker are detected by adopting N detection processes of the switching-on and switching-off positions of the circuit breaker, and the switching-on and switching-off positions of the circuit breaker are finally determined according to the obtained N pieces of switching-on and switching-off position information of the circuit breaker, so that the real position of the circuit breaker can be accurately obtained, and the phenomenon that the switching-on and switching-off detection result of the circuit breaker is unreliable is avoided.
Description
Technical Field
The invention relates to a circuit breaker device and a switching-on/off detection method and device, and belongs to the technical field of power equipment detection.
Background
The operation condition of the transformer substation is complex, the environmental difference is large, the mechanical state of the circuit breaker mechanism and the transmission part thereof cannot be accurately judged in advance, and the operation mechanism is blocked or refused to operate due to rust of the metal part possibly to cause mechanical or electrical faults; and the auxiliary nodes are difficult to accurately reflect the switching-on and switching-off states of the switch only by the switching-on and switching-off positions, so that the requirement on the double-confirmation criterion is not met, and erroneous judgment can be caused by adhesion of the auxiliary nodes. The switching-on and switching-off positions of the high-voltage circuit breaker are mainly judged by virtue of auxiliary nodes, and the switching-on and switching-off state judging mode is single, so that a new method is urgently needed to perfect the double-confirmation technical criterion, improve the reliability of the judgment of the one-key sequential control and remote control operation positions, pre-judge the operation states of an operation mechanism and a transmission part in advance, and reduce the operation risk.
The position of the transformer substation breaker is often judged whether to be in place or not by uploading remote signaling signals through an auxiliary switch and manually observing on site, and the transformer substation breaker is easily subjectively influenced by observers during the manual judgment on site, so that the working efficiency is low. Because unmanned station, remote control operation scene are unable manual work to confirm usually, some stations adopt at present to increase methods such as micro-gap switch on the circuit breaker transmission shaft and assist in judging circuit breaker position state, but have the problem such as stability is poor.
In order to realize detection of the opening and closing positions of the circuit breaker, the patent application document of the invention in China with the application publication number of CN108226770A discloses a fault diagnosis method of the circuit breaker, and the opening and closing of the circuit breaker is detected by detecting the current of an opening and closing coil. However, due to some other external factors, such as: the operation condition of the transformer substation is complex, the environmental difference is large, and the like, and the opening and closing state of the circuit breaker cannot be accurately detected only by one detection mode, and the error judgment can be caused by other reasons. To solve the above problem, the position of the circuit breaker may be determined in two different ways to realize "double confirmation" of the switch knife switch position after the primary device is operated in a sequential control. However, when the position of the circuit breaker is determined in two different ways, if the results of the detection according to the two ways are inconsistent, the true position of the circuit breaker cannot be determined because the two ways cannot be verified with each other. Therefore, the existing breaker opening and closing position monitoring method has a certain limitation, and a new technical method and a new technical means are required to be found, so that the multiple judgment of the opening and closing positions is realized.
Disclosure of Invention
The invention aims to provide a circuit breaker device and a switching-on/off detection method and device, which are used for solving the problem that the real position of a circuit breaker cannot be reliably and accurately obtained no matter whether the switching-on/off position of the circuit breaker is detected in one mode or two modes.
In order to solve the technical problems, the invention provides a breaker opening and closing detection method, which comprises the following steps:
(1) Detecting the opening and closing positions of the circuit breakers by adopting N detection processes of the opening and closing positions of the circuit breakers, wherein N is more than or equal to 3;
(2) Acquiring the breaker opening and closing position information detected in the opening and closing position detection process of each breaker to obtain N pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the breaker opening and closing position information with the number being greater than N/2 as the opening and closing position of the breaker.
In order to solve the technical problem, the invention also provides a breaker opening and closing detection device, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
(1) Detecting the opening and closing positions of the circuit breakers by adopting N detection processes of the opening and closing positions of the circuit breakers, wherein N is more than or equal to 3;
(2) Acquiring the breaker opening and closing position information detected in the opening and closing position detection process of each breaker to obtain N pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the breaker opening and closing position information with the number being greater than N/2 as the opening and closing position of the breaker.
In order to solve the technical problem, the invention also provides a circuit breaker device, which comprises a circuit breaker and a circuit breaker opening and closing detection device, wherein the circuit breaker opening and closing detection device comprises a processor and a memory, and the processor is used for processing instructions stored in the memory to realize the following method:
(1) Detecting the opening and closing positions of the circuit breakers by adopting N detection processes of the opening and closing positions of the circuit breakers, wherein N is more than or equal to 3;
(2) Acquiring the breaker opening and closing position information detected in the opening and closing position detection process of each breaker to obtain N pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the breaker opening and closing position information with the number being greater than N/2 as the opening and closing position of the breaker.
The beneficial effects of the invention are as follows: the switching-on and switching-off position of the circuit breaker is detected by adopting N types of circuit breaker switching-on and switching-off position detection processes, the number of the switching-on and switching-off position information of the circuit breaker is counted, when all detection results are consistent, the switching-on and switching-off position of the circuit breaker is directly determined according to the detection results, and when all detection results are not completely consistent, the switching-on and switching-off position information of the circuit breaker with the number being more than N/2 is determined as the switching-on and switching-off position of the circuit breaker, so that the phenomenon that the detection results are wrong due to the abnormality of individual detection processes can be effectively avoided, the real position of the circuit breaker can be accurately obtained, and the reliability of the switching-on and switching-off detection results of the circuit breaker is improved.
As a further improvement of the method, the detection device and the circuit breaker device, n=3 is required to increase the detection speed while ensuring the accuracy of the opening and closing inspection result of the circuit breaker.
As a further improvement of the method, the detection device and the circuit breaker device, in order to realize detection of the opening and closing position of the circuit breaker, the first type of opening and closing position detection process is to determine the opening and closing position of the circuit breaker by detecting the switching state of an auxiliary contact of the circuit breaker, the second type of opening and closing position detection process is to determine the opening and closing position of the circuit breaker by detecting the current information of opening and closing coils of the circuit breaker, and the third type of opening and closing position detection process is to determine the opening and closing position of the circuit breaker by detecting the current information of main lines on two sides of the circuit breaker.
As a further improvement of the method, the detection device and the circuit breaker device, in order to finally determine the opening and closing position of the circuit breaker, if the opening and closing position information of the circuit breaker obtained through the three opening and closing position detection processes of the circuit breaker is the same type of opening and closing position information of the circuit breaker, the obtained opening and closing position information of the circuit breaker is determined as the opening and closing position of the circuit breaker; if the opening and closing position information of a plurality of different circuit breakers is obtained through the opening and closing position detection processes of three circuit breakers, determining the corresponding opening and closing position information of the circuit breakers, which is obtained through statistics, as the opening and closing positions of the circuit breakers, and simultaneously judging that the opening and closing position detection process of another circuit breaker is abnormal.
Drawings
Fig. 1 is a flowchart of a method for detecting opening and closing of a circuit breaker according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the breaker opening and closing detection method comprises the following steps:
the embodiment provides a method for detecting opening and closing of a circuit breaker, a corresponding flow chart is shown in fig. 1, and the method comprises the following steps:
(1) And detecting the opening and closing positions of the circuit breakers by adopting N detection processes of the opening and closing positions of the circuit breakers, wherein N is more than or equal to 3.
In this embodiment, n=3 is taken, that is, three different breaker opening and closing position detection processes are adopted to detect the opening and closing position of the breaker, where:
the first breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the switching state of an auxiliary contact of the breaker, namely, the position of the auxiliary switch of the breaker is collected, and whether opening or closing is in place is judged. The detection process is applied to most projects, and the auxiliary switch node of the circuit breaker is led out through an electric wire.
The second circuit breaker opening and closing position detection process is to determine the opening and closing position of the circuit breaker by detecting the current information of the opening and closing coil of the circuit breaker, namely, by the change of the coil current in the opening and closing loop, whether the circuit breaker is opened or closed in place is judged. In order to acquire current information of an opening and closing coil of the circuit breaker, proper current sensors are connected in series in opening and closing loops of the circuit breaker, currents of corresponding coils during opening and closing operations are acquired, and position information of the opening and closing coils and the circuit breaker is judged through current magnitude and analysis waveforms. Specifically, a proper Hall current sensor is selected and installed in a screen cabinet of an on-site control loop of a breaker opening and closing coil; the method comprises the steps that a lead wire of a switching-on/off coil of a circuit breaker passes through a measuring aperture of a Hall current sensor, and the Hall sensor outputs current of the switching-on/off coil and waveforms of the current; and setting a proper threshold according to the action current of the opening and closing coil, outputting no current when the opening and closing coil current does not exceed the threshold, and outputting a breaker action signal and uploading waveforms when the opening and closing coil current exceeds the threshold.
The third circuit breaker opening and closing position detection process is to determine the opening and closing position of the circuit breaker by detecting current information on main lines at two sides of the circuit breaker, namely whether secondary side current of Current Transformers (CT) at two sides of the circuit breaker exists or not is used for reflecting the opening and closing of the current of the main line so as to judge the opening and closing position of the circuit breaker.
(2) Acquiring the breaker opening and closing position information detected in the opening and closing position detection process of each breaker to obtain N pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the breaker opening and closing position information with the number being greater than N/2 as the opening and closing position of the breaker.
In this embodiment, the above three breaker opening and closing position detection processes are adopted to detect the opening and closing positions of the breaker, so that detection results of 3 pieces of opening and closing position information of the breaker can be obtained, and according to the 3 detection results, the opening and closing positions of the breaker are comprehensively determined, and at this time, the three breaker opening and closing positions can be divided into two cases:
case 1: the circuit breaker opening and closing position information obtained through the three circuit breaker opening and closing position detection processes is the same circuit breaker opening and closing position information, namely the detection results of the three circuit breaker opening and closing position detection processes are consistent, and the obtained circuit breaker opening and closing position information is determined to be the opening and closing position of the circuit breaker. When the detection results of the three breaker opening and closing position detection processes are all opening and closing positions, directly judging that the breaker is in place; when the detection results of the three breaker opening and closing position detection processes are all closing positions, the breaker is directly judged to be in place.
For example, setting a corresponding detection value of 1 when the breaker is closed in place and setting a corresponding detection value of 0 when the breaker is opened in place; and, set the position of the auxiliary switch of the breaker as I F The coil current of the opening and closing loop is I D CT secondary side current at two sides of the circuit breaker is I C . When the position I of the auxiliary switch of the circuit breaker F Coil current I of =switching loop D =breaker both-side CT secondary side current I C If the value is=0, judging that the breaker is in place; when the position I of the auxiliary switch of the circuit breaker F Coil current I of =switching loop D =breaker both-side CT secondary side current I C And (1) judging that the circuit breaker is closed in place. Of course, as another embodiment, it is also possible to set the detection value 0 to correspond to the closing of the circuit breaker in place and set the detection value 1 to correspond to the opening of the circuit breaker in place.
Case 2: the switching-on and switching-off position information of a plurality of different types of circuit breakers is obtained through the switching-on and switching-off position detection process of three types of circuit breakers, namely the detection results of the switching-on and switching-off position detection process of the three types of circuit breakers are not completely consistent, the corresponding switching-on and switching-off position information of the circuit breakers, the number of which is obtained through statistics is determined to be the switching-on and switching-off position of the circuit breakers, meanwhile, the other type of switching-on and switching-off position detection process of the circuit breakers is determined to be abnormal, and fault points can be rapidly located.
Similarly, setting a corresponding detection value of 1 when the breaker is closed in place and setting a corresponding detection value of 0 when the breaker is opened in place; setting the position of the auxiliary switch of the circuit breaker as I F The coil current of the opening and closing loop is I D CT secondary side current at two sides of the circuit breaker is I C . When the position I of the auxiliary switch of the circuit breaker F =divide and combineCoil current I of gate loop D CT secondary side current I on two sides of circuit breaker C Then according to the position I of the auxiliary switch of the circuit breaker F Coil current I of =switching loop D Determining the position of a circuit breaker, and simultaneously judging that the detection process of CT secondary side currents at two sides of the circuit breaker is abnormal; when CT secondary side current I is at two sides of the circuit breaker C Coil current I of =switching loop D Position I of auxiliary switch of not equal to breaker F Then according to the CT secondary side current I at the two sides of the circuit breaker C Coil current I of =switching loop D Determining the position of a circuit breaker, and simultaneously judging that abnormality exists in the detection process of the position of an auxiliary switch of the circuit breaker; when the position I of the auxiliary switch of the circuit breaker F =breaker both-side CT secondary side current I C Coil current I of switching circuit D Then according to the position I of the auxiliary switch of the circuit breaker F =breaker both-side CT secondary side current I C And determining the position of the circuit breaker, and simultaneously judging that the abnormality exists in the detection process of the coil current of the opening and closing loop.
When the breaker is switched on and off, the state signal of the switch on and off position of the breaker is comprehensively determined by adopting the three detection processes, and can be used as a confirmation signal for judging whether the remote operation is successful or not, so that the double confirmation of the position of the breaker can be completed, and good technical support is provided for the implementation of the one-key sequential control technology of the transformer substation. Meanwhile, the three detection processes can be mutually corrected, when data are abnormal due to failure of one detection process, the position of the circuit breaker can still be accurately judged through the other two detection processes, the possible position of the abnormality can be found out according to the detection process with the error result, the fault point is rapidly positioned, precious time is saved for fault positioning, and a reference is provided for transformer substation operators to process faults.
It should be noted that, when three detection processes are used to detect the opening and closing position of the circuit breaker, the embodiment only provides three specific detection processes, and other detection processes existing in the prior art may be used to replace the specific detection processes provided above. In addition, in order to further improve the accuracy of the breaker opening and closing detection result and improve the judging capability of the breaker position under abnormal conditions, the number N of the breaker opening and closing position detection processes is not limited to 3, other detection processes existing in the prior art can be added to detect the breaker opening and closing position, and then the breaker opening and closing position information with the number greater than N/2 is determined as the opening and closing position of the breaker according to the detection results of all the detection processes. For example, the detection processes existing in the prior art are: when the circuit breaker is driven by a motor, detecting the running state or running curve of the driving motor to obtain the opening and closing position of the circuit breaker.
The embodiment of the breaker opening and closing detection device comprises:
the embodiment provides a circuit breaker opening and closing detection device, which comprises a processor and a memory, wherein the processor is used for processing instructions stored in the memory so as to realize the circuit breaker opening and closing detection method. Because the method for detecting the opening and closing of the circuit breaker is described in detail in the embodiment of the method for detecting the opening and closing of the circuit breaker, for those skilled in the art, a corresponding computer instruction can be generated according to the method for detecting the opening and closing of the circuit breaker to obtain a device for detecting the opening and closing of the circuit breaker, which is not described herein again.
Circuit breaker apparatus embodiment:
the embodiment provides a circuit breaker device, which comprises a circuit breaker and a circuit breaker opening and closing detection device, wherein the circuit breaker opening and closing detection device comprises a processor and a memory, and the processor is used for processing instructions stored in the memory so as to realize the circuit breaker opening and closing detection method. Because the method for detecting the opening and closing of the circuit breaker is described in detail in the embodiment of the method for detecting the opening and closing of the circuit breaker, the description is omitted here.
Finally, it should be noted that the foregoing embodiments are merely for illustrating the technical solution of the present invention and not for limiting the scope of protection thereof, and although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes, modifications or equivalents may be made to the specific embodiments of the application after reading the present application, and these changes, modifications or equivalents are within the scope of protection of the claims of the present invention.
Claims (3)
1. The circuit breaker opening and closing detection method is characterized by comprising the following steps of:
(1) Detecting the opening and closing positions of the circuit breaker by adopting three different opening and closing position detection processes of the circuit breaker;
(2) Acquiring the breaker opening and closing position information obtained by detection in the opening and closing position detection process of each breaker to obtain three pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the obtained breaker opening and closing position information as the opening and closing position of the breaker if the breaker opening and closing position information obtained by the three pieces of breaker opening and closing position detection process is the same piece of breaker opening and closing position information; if multiple different breaker opening and closing position information is obtained through three different breaker opening and closing position detection processes, determining the two corresponding breaker opening and closing position information obtained through statistics as opening and closing positions of the breakers, and judging that the other breaker opening and closing position detection process is abnormal;
the first breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the switching state of an auxiliary contact of the breaker, the second breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of opening and closing coils of the breaker, and the third breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of main lines on two sides of the breaker.
2. The circuit breaker opening and closing detection device is characterized by comprising a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
(1) Detecting the opening and closing positions of the circuit breaker by adopting three different opening and closing position detection processes of the circuit breaker;
(2) Acquiring the breaker opening and closing position information obtained by detection in the opening and closing position detection process of each breaker to obtain three pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the obtained breaker opening and closing position information as the opening and closing position of the breaker if the breaker opening and closing position information obtained by the three pieces of breaker opening and closing position detection process is the same piece of breaker opening and closing position information; if multiple different breaker opening and closing position information is obtained through three different breaker opening and closing position detection processes, determining the two corresponding breaker opening and closing position information obtained through statistics as opening and closing positions of the breakers, and judging that the other breaker opening and closing position detection process is abnormal;
the first breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the switching state of an auxiliary contact of the breaker, the second breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of opening and closing coils of the breaker, and the third breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of main lines on two sides of the breaker.
3. The circuit breaker device comprises a circuit breaker and a circuit breaker opening and closing detection device, and is characterized by comprising a processor and a memory, wherein the processor is used for processing instructions stored in the memory to realize the following method:
(1) Detecting the opening and closing positions of the circuit breaker by adopting three different opening and closing position detection processes of the circuit breaker;
(2) Acquiring the breaker opening and closing position information obtained by detection in the opening and closing position detection process of each breaker to obtain three pieces of breaker opening and closing position information, counting the number of the same pieces of breaker opening and closing position information, and determining the obtained breaker opening and closing position information as the opening and closing position of the breaker if the breaker opening and closing position information obtained by the three pieces of breaker opening and closing position detection process is the same piece of breaker opening and closing position information; if multiple different breaker opening and closing position information is obtained through three different breaker opening and closing position detection processes, determining the two corresponding breaker opening and closing position information obtained through statistics as opening and closing positions of the breakers, and judging that the other breaker opening and closing position detection process is abnormal;
the first breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the switching state of an auxiliary contact of the breaker, the second breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of opening and closing coils of the breaker, and the third breaker opening and closing position detection process is to determine the opening and closing position of the breaker by detecting the current information of main lines on two sides of the breaker.
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| CN201811602871.5A CN111366843B (en) | 2018-12-26 | 2018-12-26 | Circuit breaker device and switching-on/off detection method and device |
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| CN113093635B (en) * | 2021-03-02 | 2022-07-12 | 深圳供电局有限公司 | Measurement and control system |
| CN115184785B (en) * | 2022-06-23 | 2024-05-07 | 苏州西门子电器有限公司 | Test method, test system and electronic equipment |
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