CN111366843A - Circuit breaker device and opening and closing detection method and device - Google Patents
Circuit breaker device and opening and closing detection method and device Download PDFInfo
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- CN111366843A CN111366843A CN201811602871.5A CN201811602871A CN111366843A CN 111366843 A CN111366843 A CN 111366843A CN 201811602871 A CN201811602871 A CN 201811602871A CN 111366843 A CN111366843 A CN 111366843A
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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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- Arc-Extinguishing Devices That Are Switches (AREA)
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 breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3; the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker. The opening and closing positions of the circuit breaker are detected by adopting the N circuit breaker opening and closing position detection processes, and the opening and closing positions of the circuit breaker are finally determined according to the obtained N circuit breaker opening and closing position information, so that the real position of the circuit breaker can be accurately obtained, and the phenomenon that the opening and closing 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 and switching-off detection method and device, and belongs to the technical field of power equipment detection.
Background
The operation conditions of the transformer substation are complex, the environmental difference is large, the mechanical states of the circuit breaker mechanism and the transmission parts thereof cannot be accurately judged in advance, and the operating mechanism is jammed or refused to move due to corrosion of metal parts, so that mechanical or electrical faults occur; and the auxiliary nodes are difficult to accurately reflect the on-off state of the switch only depending on the on-off position and the on-off position, the requirement on 'double confirmation' criterion is not met, and the error judgment can be caused by the adhesion of the auxiliary nodes. The opening and closing positions of the high-voltage circuit breaker are mainly judged by the auxiliary nodes, and the opening and closing state judgment mode is single, so that a new method is urgently needed to perfect the double-confirmation technical criterion, improve the reliability of one-key sequential control and remote control operation position judgment, pre-judge the operation states of an operating mechanism and a transmission part in advance and reduce the operation risk.
The position of the circuit breaker of the transformer substation is usually judged whether the separation and the combination are in place or not through uploading of a remote signaling signal by an auxiliary switch and field manual observation, the subjective influence of an observer is easily received during the field manual judgment, and the working efficiency is low. Because unattended stations and remote control operation sites can not be confirmed manually, at present, some stations adopt methods such as adding a microswitch on a transmission shaft of a circuit breaker to assist in judging the position state of the circuit breaker, but have the problems of poor stability and the like.
In order to realize the detection of the opening and closing positions of the circuit breaker, the chinese patent application with application publication No. CN108226770A discloses a method for diagnosing the fault of the circuit breaker, which detects the opening and closing of the circuit breaker by detecting the current of the opening and closing coil. However, due to some other extrinsic factors, such as: the transformer substation has complex operation conditions, large environmental difference and the like, and the opening and closing state of the circuit breaker cannot be accurately detected only by one detection mode, and wrong judgment can be caused by other reasons. In order to solve the problems, the position of the breaker can be judged in two different modes so as to realize double confirmation of the position of the switch knife switch after the equipment is operated once in a sequential control mode. However, when the position of the circuit breaker is determined in two different ways, if the results obtained by detecting according to the two ways are inconsistent, the actual position of the circuit breaker cannot be determined because the two ways cannot be verified against each other. Therefore, the existing method for monitoring the opening and closing positions of the circuit breaker has certain limitations, and a new technical method and a new technical means need to be found to realize the multiple judgment of the opening and closing positions.
Disclosure of Invention
The invention aims to provide a circuit breaker device, a switching-on and switching-off detection method and a switching-on and switching-off detection device, which are used for solving the problem that the real position of a circuit breaker cannot be reliably and accurately obtained no matter one mode or two modes are adopted to detect the switching-on and switching-off position of the circuit breaker.
In order to solve the technical problem, 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 breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
In order to solve the technical problem, the invention further provides a circuit breaker opening and closing detection device, which comprises a processor and a memory, wherein the processor is used for processing the instructions stored in the memory to realize the following method:
(1) detecting the opening and closing positions of the circuit breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
In order to solve the technical problem, the invention further 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 the instructions stored in the memory to realize the following method:
(1) detecting the opening and closing positions of the circuit breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
The invention has the beneficial effects that: the opening and closing positions of the circuit breaker are detected by adopting N circuit breaker opening and closing position detection processes, the number of the opening and closing position information of the circuit breaker belonging to the same type is counted, when all detection results are consistent, the opening and closing position of the circuit breaker is directly determined according to the detection results, and when all detection results are not completely consistent, the opening and closing position information of the circuit breaker of which the number is greater than N/2 is determined as the opening and closing position of the circuit breaker, so that the phenomenon that the detection results are wrong due to the abnormity of individual detection processes can be effectively avoided, the real position of the circuit breaker can be accurately obtained, and the reliability of the opening and closing detection results of the circuit breaker is improved.
As further improvements of the method, the detection device and the circuit breaker device, in order to increase the detection speed while ensuring the accuracy of the circuit breaker opening and closing inspection result, N is 3.
As further improvement of the method, the detection device and the circuit breaker device, in order to realize the detection of the opening and closing positions of the circuit breaker, the first circuit breaker opening and closing position detection process is to determine the opening and closing positions of the circuit breaker by detecting the switching state of the auxiliary contacts of the circuit breaker, the second circuit breaker opening and closing position detection process is to determine the opening and closing positions of the circuit breaker by detecting the current information of the opening and closing coils of the circuit breaker, and the third circuit breaker opening and closing position detection process is to determine the opening and closing positions of the circuit breaker by detecting the current information on the main lines on two sides of the circuit breaker.
As further improvement of the method, the detection device and the circuit breaker device, in order to finally determine the opening and closing positions 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 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; and if the opening and closing position information of the various different circuit breakers is obtained through the three circuit breaker opening and closing position detection processes, determining the corresponding circuit breaker opening and closing position information with the counted number of 2 as the opening and closing position of the circuit breaker, and simultaneously judging that the other circuit breaker opening and closing position detection process is abnormal.
Drawings
Fig. 1 is a flow chart of a circuit breaker opening and closing detection method of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further 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, and 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 breaker by adopting N circuit breaker opening and closing position detection processes, wherein N is more than or equal to 3.
Wherein, in this embodiment, get N3, adopt the circuit breaker divide-shut brake position detection process of three kinds of differences to detect the divide-shut brake position of circuit breaker promptly, wherein:
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 the auxiliary contact of the breaker, namely, the position of the auxiliary switch of the breaker is collected, and whether the 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 can be led out through a 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, judge whether the circuit breaker is in place for opening or closing by the change of the coil current in the opening and closing loop. In order to obtain the current information of the opening and closing coils of the circuit breaker, proper current sensors are connected in series in the opening and closing loops of the circuit breaker, the current of the corresponding coils during opening and closing operation is collected, and the position information of the opening and closing coils and the circuit breaker is judged according to the current magnitude and the analysis waveform. Specifically, a proper Hall current sensor is selected and installed in a screen cabinet of a local control loop of a circuit breaker opening and closing coil; leading wires of the opening and closing coils of the circuit breaker to penetrate through a measuring aperture of a Hall current sensor, and outputting opening and closing coil currents and waveforms thereof by the Hall current sensor; and a proper threshold value is set according to the action current of the opening and closing coil, the opening and closing coil current is not output when not exceeding the threshold value, and a breaker action signal and an uploading waveform are output when exceeding the threshold value.
The third detection process of the opening and closing positions of the circuit breaker is to determine the opening and closing positions of the circuit breaker by detecting current information on main circuits on two sides of the circuit breaker, namely, whether secondary side currents of Current Transformers (CT) on two sides of the circuit breaker are present or not to reflect the on-off of the current of the main circuits so as to judge the opening and closing positions of the circuit breaker.
(2) The method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
In this embodiment, adopt above-mentioned three kinds of circuit breaker divide-shut brake position detecting process to detect the divide-shut brake position of circuit breaker, can obtain 3 circuit breaker divide-shut brake position information's testing result, according to 3 testing results, synthesize the divide-shut brake position that judges out the circuit breaker, can divide into two kinds of situations this moment:
case 1: the opening and closing position information of the circuit breaker obtained through the opening and closing position detection processes of the three circuit breakers is the same type of opening and closing position information of the circuit breaker, namely the detection results of the opening and closing position detection processes of the three circuit breakers are consistent, and the obtained opening and closing position information of the circuit breaker is determined as 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 positions, the opening of the breaker is directly judged to be in place; when the detection results of the three breaker opening and closing position detection processes are all closing positions, the fact that the breaker is closed in place is directly judged.
For example, a corresponding detection value is set to be 1 when the breaker is closed in place, and a corresponding detection value is set to be 0 when the breaker is opened in place; and, the position of the auxiliary switch of the circuit breaker is set as IFThe coil current of the opening and closing loop is IDThe current of the secondary side of the CT on both sides of the circuit breaker is IC. When the position of the auxiliary switch of the circuit breaker IFCoil current I of switching-on/off loopDTwo-side CT secondary side current I of circuit breakerCIf the current is 0, judging that the breaker is in place; when the position of the auxiliary switch of the circuit breaker IFCoil current I of switching-on/off loopDTwo-side CT secondary side current I of circuit breaker C1, thenAnd judging that the circuit breaker is in place. Of course, as another embodiment, the detection value 0 may correspond to the state that the breaker is closed in place, and the detection value 1 may correspond to the state that the breaker is opened in place.
Case 2: the on-off position information of the circuit breakers in various different types is obtained through the on-off position detection process of the three types of circuit breakers, namely, the detection results of the on-off position detection processes of the three types of circuit breakers are not completely consistent, the on-off position information of the corresponding circuit breakers, the number of which is 2, obtained through statistics is determined as the on-off position of the circuit breaker, and meanwhile, the other circuit breaker on-off position detection process is judged to be abnormal, so that a fault point can be located rapidly.
Similarly, a corresponding detection value is set to be 1 when the breaker is switched on in place, and a corresponding detection value is set to be 0 when the breaker is switched off in place; setting the position of an auxiliary switch of a circuit breaker to IFThe coil current of the opening and closing loop is IDThe current of the secondary side of the CT on both sides of the circuit breaker is IC. When the position of the auxiliary switch of the circuit breaker IFCoil current I of switching-on/off loopDNot equal to the current I of the secondary side of the CT on two sides of the circuit breakerCThen according to the position I of the auxiliary switch of the circuit breakerFCoil current I of switching-on/off loopDDetermining the position of the circuit breaker, and simultaneously judging that the detection process of the secondary side current of the CT on two sides of the circuit breaker is abnormal; when the current I of the secondary side of the CT on both sides of the circuit breakerCCoil current I of switching-on/off loopDPosition I of auxiliary switch of circuit breakerFThen according to the current I of the secondary side of CT at two sides of the circuit breakerCCoil current I of switching-on/off loopDDetermining the position of the circuit breaker, and judging whether the detection process of the position of the auxiliary switch of the circuit breaker is abnormal; when the position of the auxiliary switch of the circuit breaker IFTwo-side CT secondary side current I of circuit breakerCCoil current I not equal to switching-on/off loopDThen according to the position I of the auxiliary switch of the circuit breakerFTwo-side CT secondary side current I of circuit breakerCAnd determining the position of the circuit breaker, and judging that the detection process of the coil current of the opening and closing circuit is abnormal.
When the breaker is switched on and off, the state signals of the switching-on and switching-off positions of the breaker are comprehensively determined by adopting the three detection processes and are used as confirmation signals for confirming whether remote operation is successful, double confirmation of the positions of the breaker can be completed, and good technical support is provided for implementation of a one-key sequence control technology of a 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 position where the abnormality possibly exists is found out according to the detection process with the wrong result, the fault point is quickly positioned, precious time is saved for fault positioning, and reference is provided for substation operators to process faults.
It should be noted that, when three detection processes are used to detect the opening and closing positions of the circuit breaker, this embodiment only provides three specific detection processes, and may also use other detection processes existing in the prior art to correspondingly replace the specific detection processes. In addition, in order to further improve the accuracy of the detection results of the opening and closing of the circuit breaker and improve the judgment capability of the position of the circuit breaker under abnormal conditions, the number N of the detection processes of the opening and closing positions of the circuit breaker is not limited to 3, other detection processes existing in the prior art can be added to detect the opening and closing positions of the circuit breaker, and then the information of the opening and closing positions of the circuit breaker, the number of which is greater than N/2, is determined as the opening and closing positions of the circuit breaker according to the detection results of all the detection processes. For example, the detection process existing in the prior art is: when the circuit breaker is driven by the motor, the operation state or the operation curve of the driving motor is detected to obtain the opening and closing position of the circuit breaker.
Breaker divide-shut brake detection device embodiment:
the embodiment 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 so as to realize the breaker opening and closing detection method. Since the breaker opening and closing detection method has been described in detail in the above embodiment of the breaker opening and closing detection method, for those skilled in the art, a corresponding computer instruction may be generated according to the breaker opening and closing detection method to obtain the breaker opening and closing detection device, and details are not described here.
Breaker device 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. Since the method for detecting the opening and closing of the circuit breaker has been described in detail in the above embodiment of the method for detecting the opening and closing of the circuit breaker, the details are not described herein.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present application, various changes, modifications or equivalents of the embodiments of the present application can be made, and these changes, modifications or equivalents are within the protection scope of the claims of the present invention.
Claims (10)
1. A circuit breaker opening and closing detection method is characterized by comprising the following steps:
(1) detecting the opening and closing positions of the circuit breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
2. The circuit breaker opening/closing detection method according to claim 1, wherein N is 3.
3. The circuit breaker opening and closing detection method according to claim 2, wherein a first circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting the on-off state of the auxiliary contact of the circuit breaker, a second circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting current information of the opening and closing coil of the circuit breaker, and a third circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting current information on the main lines on both sides of the circuit breaker.
4. The circuit breaker opening and closing detection method according to claim 2 or 3, characterized in that if 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, the obtained circuit breaker opening and closing position information is determined as the opening and closing position of the circuit breaker; and if the opening and closing position information of the various different circuit breakers is obtained through the three circuit breaker opening and closing position detection processes, determining the corresponding circuit breaker opening and closing position information with the counted number of 2 as the opening and closing position of the circuit breaker, and simultaneously judging that the other circuit breaker opening and closing position detection process is abnormal.
5. A 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 N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
6. The circuit breaker opening and closing detection device according to claim 5, wherein N-3.
7. The circuit breaker opening and closing detection device according to claim 6, wherein a first circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting the on-off state of the auxiliary contact of the circuit breaker, a second circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting current information of the opening and closing coil of the circuit breaker, and a third circuit breaker opening and closing position detection process determines the opening and closing position of the circuit breaker by detecting current information on the main lines on both sides of the circuit breaker.
8. The utility model provides a circuit breaker device, includes circuit breaker and circuit breaker divide-shut brake detection device, its characterized in that, circuit breaker divide-shut brake detection device includes treater and memory, the treater is used for handling the instruction of storage in the memory is in order to realize following method:
(1) detecting the opening and closing positions of the circuit breaker by adopting N detection processes of the opening and closing positions of the circuit breaker, wherein N is more than or equal to 3;
(2) the method comprises the steps of obtaining breaker opening and closing position information obtained by detection in each breaker opening and closing position detection process to obtain N breaker opening and closing position information, counting the number of the same breaker opening and closing position information, and determining the breaker opening and closing position information of which the number is larger than N/2 as the opening and closing position of a breaker.
9. The circuit breaker apparatus of claim 8 wherein N-3.
10. The circuit breaker apparatus of claim 9, wherein the first circuit breaker opening and closing position detecting process is to determine the opening and closing position of the circuit breaker by detecting the on-off state of the auxiliary contacts of the circuit breaker, the second circuit breaker opening and closing position detecting 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, and the third circuit breaker opening and closing position detecting process is to determine the opening and closing position of the circuit breaker by detecting the current information on the main lines on both sides of the circuit breaker.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113093635A (en) * | 2021-03-02 | 2021-07-09 | 深圳供电局有限公司 | Measurement and control system |
| CN115184785A (en) * | 2022-06-23 | 2022-10-14 | 苏州西门子电器有限公司 | Test method, test system and electronic device |
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