CN116026292B - Breaker travel track reproduction device and method based on three-eye imaging principle - Google Patents
Breaker travel track reproduction device and method based on three-eye imaging principle Download PDFInfo
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- CN116026292B CN116026292B CN202310317743.0A CN202310317743A CN116026292B CN 116026292 B CN116026292 B CN 116026292B CN 202310317743 A CN202310317743 A CN 202310317743A CN 116026292 B CN116026292 B CN 116026292B
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Abstract
The invention relates to a circuit breaker travel track reproduction device and a circuit breaker travel track reproduction method based on a three-eye imaging principle, wherein an initial switch of a three-eye imaging instrument is connected with a switching-off coil or a switching-on coil of a circuit breaker, a termination switch of the three-eye imaging instrument is connected with a secondary wiring of a current transformer connected with the circuit breaker, shooting can be carried out according to the through-flow moment of the switching-off coil or the switching-on coil, meanwhile, the shooting is carried out at the primary current switching-on moment of the circuit breaker, the shot track is input into a diagnostic machine to calculate the switching-on time difference among phases, and the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process are obtained. According to the invention, the mechanical characteristic test efficiency of the circuit breaker can be effectively improved, on one hand, more than 90% of time of a response test can be saved during a handover test, and meanwhile, the danger of up-down high-altitude wiring once is avoided, and on the other hand, the mechanical characteristic of the circuit breaker can be measured during routine actions, load guiding and other works of the circuit breaker, so that equipment power failure and lead disassembly are not required, and the measurement blank under the running condition is filled.
Description
Technical Field
The invention belongs to the technical field of transformer abnormal defect diagnosis, and particularly relates to a breaker travel track reproduction device and method based on a three-eye imaging principle.
Background
At present, abnormal defects of a circuit breaker mechanism and transmission become the most important factors influencing the reliable operation of the circuit breaker, and how to effectively discover the defects of the circuit breaker mechanism and the transmission in advance is important. The traditional mechanical performance detection method comprises a mechanical characteristic test and an opening and closing coil current test, but the mechanical characteristic test needs to be carried out in a power failure state of equipment, and the control capability is slightly insufficient in the current unnecessary uninterrupted operation and maintenance mode, for example, the power failure maintenance is carried out only once in 7 years in the normal state of a 110 kilovolt circuit breaker, the test is complex, the field completion degree is not high, and particularly, the opening and closing speed test is frequently ignored; the current test of the opening and closing coil can only indirectly reflect the problem of jamming of part of the mechanism, the defect detection is incomplete, such as loosening of a contact, and key parameters such as opening and closing time, synchronism and speed of the circuit breaker cannot be intuitively given. Therefore, the method has the advantages that the mechanical performance test of the circuit breaker in the non-power-off and non-contact state is realized, the detection difficulty is reduced, the detection frequency is improved, the management and control level is enhanced, and the method has very important significance for guaranteeing the safe and stable operation of the circuit breaker.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a circuit breaker travel track reproduction device and a circuit breaker travel track reproduction method based on a three-eye imaging principle, which can effectively improve test efficiency and reduce test difficulty on the basis of realizing effective reproduction of mechanical travel of a circuit breaker and detection and calculation of key parameters of mechanical characteristics.
The invention solves the technical problems by adopting the following technical scheme:
the utility model provides a circuit breaker travel track reproduction device based on three mesh imaging principle is connected with the circuit breaker, including three mesh imaging instrument, diagnostic machine and experimental wiring, the start switch of three mesh imaging instrument passes through the opening coil or the closing coil of first experimental wiring connection circuit breaker for the start switch is controlled to the through-flow moment of sensing opening coil or closing coil, and then controls the time that three mesh imaging instrument began to shoot, and the stop switch of three mesh imaging instrument passes through the second experimental wiring connection and links to each other with the circuit breaker on the secondary wiring of current transformer for the first current break-make moment control stop switch of induction circuit breaker, and then controls the time that three mesh imaging instrument stopped shooting, three mesh imaging instrument connects diagnostic machine.
Moreover, the test wiring includes a miniature ammeter.
A reproduction method of a circuit breaker travel track reproduction device based on a three-eye imaging principle comprises a measurement closing process and a brake separating process.
Moreover, the closing process comprises the following steps:
step 1.1, connecting an initial switch of a three-eye imager with a closing coil of a circuit breaker through a first test wiring, and connecting a terminal switch of the three-eye imager with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring;
step 1.2, when the through-flow time t1 of the induction closing coil of the first test wiring is reached, the three-eye imager starts shooting;
step 1.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is in the time t 2;
step 1.4, obtaining the closing time t Closing device =t2-t1；
And 1.5, repeating the steps 1.1 to 1.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the switching-on time difference between the phases.
Moreover, the opening process comprises the following steps:
step 2.1, connecting an initial switch of the three-eye imager with a brake-separating coil of a circuit breaker through a first test wiring, and connecting a terminal switch of the three-eye imager with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring;
step 2.2, when the first test wiring induction switching-off coil current moment t3, shooting by the three-eye imager;
step 2.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is in the time t 4;
step 2.4, obtaining the opening time t Dividing into =t4-t3；
And 2.5, repeating the steps 2.1 to 2.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the opening time difference between the phases.
The specific implementation method of the speed of the breaker in the moving process in the steps 1.5 and 2.56 is as follows:
the breaker just-divided speed is the average speed of the breaker within 0.01s just after the division:
wherein L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the breaking speed of the breaker is the ratio of travel to time in the breaking process:
wherein L3 is a travel track of a breaker contact at the opening time shot by a three-eye imager;
the breaker closing speed is the average speed of the breaker within 0.01s just before closing:
wherein L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the closing speed of the circuit breaker is the average speed in the action time in the closing process:
four speeds are obtained through a three-eye imager, and then the travel track of the breaker contact is obtained.
The method for reproducing the synchronization of the interrupt router in the step 1.5 and the step 1.6 comprises the following steps: the closing synchronism is three-phase closing time t He A 、t He B 、t C combination The time difference between the two is the three-phase brake-separating time t Divide A 、t B part 、t C part Time difference between them.
The invention has the advantages and positive effects that:
the starting switch of the three-eye imager is connected with the opening coil or the closing coil of the circuit breaker through the first test wiring, the ending switch of the three-eye imager is connected with the secondary wiring of the current transformer connected with the circuit breaker through the second test wiring, shooting can be carried out according to the through-flow moment of the opening coil or the closing coil, meanwhile, the shooting track is stopped at the moment of primary current on-off of the circuit breaker, the shooting track is input into the diagnostic machine for calculation to obtain the travel track of the three-phase contact of the circuit breaker, and the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process are obtained by calculating the closing time difference between phases. According to the invention, the mechanical characteristic test efficiency of the circuit breaker can be effectively improved, on one hand, more than 90% of time of a response test can be saved during a handover test, and meanwhile, the danger of up-down high-altitude wiring once is avoided, and on the other hand, the mechanical characteristic of the circuit breaker can be measured during routine actions, load guiding and other works of the circuit breaker, so that equipment power failure and lead disassembly are not required, and the measurement blank under the running condition is filled.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a graph of the closing of the circuit breaker of the present invention;
fig. 3 is a schematic diagram of a three-dimensional imaging system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The circuit breaker travel track reproduction device based on the three-eye imaging principle is connected with a circuit breaker as shown in fig. 1, and comprises a three-eye imaging instrument, a diagnostic machine and a test wiring (comprising a small ammeter), wherein an initial switch of the three-eye imaging instrument is connected with a brake-separating coil or a brake-closing coil of the circuit breaker through a first test wiring, is used for controlling the initial switch at the through-flow moment of the brake-separating coil or the brake-closing coil, is used as the shooting trigger moment of the three-eye imaging instrument, namely the action initial moment of the circuit breaker, and a termination switch of the three-eye imaging instrument is connected with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring, is used for controlling the termination switch by sensing the primary current on-off moment of the circuit breaker, and is used as the shooting termination moment of the three-eye imaging instrument, namely the termination moment of the circuit breaker. The three-eye imaging instrument is connected with the diagnostic machine.
For example, when measuring the switching-on process of the breaker, the first test wiring is connected to the switching-on coil of the breaker, the current flowing time t1 of the induction switching-on coil is measured, the second test wiring is connected to the secondary wiring of the current transformer, the primary current flowing time t2 of the induction breaker is measured, and the switching-on time is t Closing device =t2-t 1. Similarly, when the breaker opening process is measured, the first test wiring is connected to the breaker opening coil, the flowing time t3 of the breaker opening coil is induced, the second test wiring is connected to the secondary wiring of the current transformer, the primary current interruption time t4 of the breaker is induced, and the opening time is t Dividing into When the action track of the three-phase connecting rod of the circuit breaker is shot, the travel track of the three-phase contact of the circuit breaker can be obtained, the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process can be obtained by calculating the opening and closing time difference between each phase, and if the synchronism of the closing is the three-phase closing time t He A 、t He B 、t C combination The time difference between the two is the three-phase brake-separating time t Divide A 、t B part 、t C part Time difference between them.
A reproduction method of a circuit breaker travel track reproduction device based on a three-eye imaging principle comprises a measurement closing process and a brake separating process.
The closing process comprises the following steps:
step 1.1, connecting an initial switch of the three-eye imaging instrument with a closing coil of a circuit breaker through a first test wiring, and connecting a terminating switch of the three-eye imaging instrument with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring.
And 1.2, when the first test wiring induction closing coil current moment t1, shooting by the three-eye imager is started.
And 1.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is time t 2.
Step 1.4, obtaining the closing time t Closing device =t2-t1。
And 1.5, repeating the steps 1.1 to 1.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the switching-on time difference between the phases.
Wherein, the brake separating process comprises the following steps:
and 2.1, connecting an initial switch of the three-eye imager with a brake-separating coil of the circuit breaker through a first test wiring, and connecting a terminal switch of the three-eye imager with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring.
And 2.2, when the first test wiring induction switching-off coil current moment t3, shooting is started by the three-eye imager.
And 2.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is in the time t 4.
Step 2.4, obtaining the opening time t Dividing into =t4-t3。
And 2.5, repeating the steps 2.1 to 2.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the opening time difference between the phases.
As shown in fig. 2, the specific implementation method of the speed of the circuit breaker in the movement process in step 1.5 and step 2.56 is as follows:
the breaker just-divided speed is the average speed of the breaker within 0.01s just after the division:
wherein L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the breaking speed of the breaker is the ratio of travel to time in the breaking process:
wherein L3 is a travel track of a breaker contact at the opening time shot by a three-eye imager;
the breaker closing speed is the average speed of the breaker within 0.01s just before closing:
wherein L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the closing speed of the circuit breaker is the average speed in the action time in the closing process:
four speeds are obtained through a three-eye imager, and then the travel track of the breaker contact is obtained.
As shown in fig. 3, the principle of the invention using a three-eye imager is as follows: the shooting errors caused by human factors such as different shooting methods and different shooting distances are overcome, and three cameras are used for shootingThe angular position relationship between the heads is known per se, and the actual motion travel of the connecting rod (i.e. the contact) is calculated objectively. The specific calculation is as follows (see fig. 3), assuming that in case of using only a single camera a (fig. 3 a), the projection of the actual object stroke CD on the camera is AC and AD, but only the length of two sides is already present, the third side CD cannot be calculated, so that another camera B (fig. 3B) needs to be added, and the distance AB between the already present AB and the already present distance AB is the sameCAB, the projection of CD on camera B, is CB and DB according to the cosine theorem:calculated in triangle CAB>CBA, in triangle ABD +.>ABD，ABD-/>CBA can get +.>DBC, in which CDs, i.e. actual object strokes, are available. The third camera is added, so that on one hand, the accuracy of measurement is improved for calculation between two cameras, and on the other hand, after problems occur in one camera, the other two cameras can obtain effective strokes, and the reliability of the device is guaranteed.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention includes, but is not limited to, the examples described in the detailed description, as other embodiments derived from the technical solutions of the invention by a person skilled in the art are equally within the scope of the invention.
Claims (3)
1. The reproduction method of the circuit breaker travel track reproduction device based on the three-eye imaging principle is characterized in that the reproduction device is connected with the circuit breaker and is characterized in that: the reproduction device comprises a three-eye imager, a diagnostic machine and a test wiring, wherein an initial switch of the three-eye imager is connected with a switching-off coil or a switching-on coil of a circuit breaker through a first test wiring, is used for sensing the current moment of the switching-off coil or the switching-on coil to control the initial switch, further controlling the shooting starting time of the three-eye imager, and a terminal switch of the three-eye imager is connected with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring, is used for sensing the primary current on-off moment of the circuit breaker to control the terminal switch, further controlling the shooting stopping time of the three-eye imager, and is connected with the diagnostic machine; the test wiring comprises a small ammeter;
the reproduction method comprises the steps of measuring a closing process and a separating process;
the closing process comprises the following steps:
step 1.1, connecting an initial switch of a three-eye imager with a closing coil of a circuit breaker through a first test wiring, and connecting a terminal switch of the three-eye imager with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring;
step 1.2, when the through-flow time t1 of the induction closing coil of the first test wiring is reached, the three-eye imager starts shooting;
step 1.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is in the time t 2;
step 1.4, obtaining the closing time t Closing device =t2-t1；
Step 1.5, repeating the steps 1.1 to 1.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the switching-on time difference between the phases;
the brake separating process comprises the following steps:
step 2.1, connecting an initial switch of the three-eye imager with a brake-separating coil of a circuit breaker through a first test wiring, and connecting a terminal switch of the three-eye imager with a secondary wiring of a current transformer connected with the circuit breaker through a second test wiring;
step 2.2, when the first test wiring induction switching-off coil current moment t3, shooting by the three-eye imager;
step 2.3, stopping shooting by the three-eye imager when the primary current of the second test wiring induction circuit breaker is in the time t 4;
step 2.4, obtaining the opening time t Dividing into =t4-t3；
And 2.5, repeating the steps 2.1 to 2.4 until the action tracks of the three-phase connecting rods of the phase A, the phase B and the phase C of the circuit breaker are completed, sending the shot action tracks of the connecting rods to a diagnostic machine by a three-eye imaging device to obtain the travel tracks of the three-phase contacts of the circuit breaker, and obtaining the synchronism of the circuit breaker and the speed of the circuit breaker in the moving process by calculating the opening time difference between the phases.
2. The reproduction method of the circuit breaker travel track reproduction apparatus based on the three-dimensional imaging principle according to claim 1, wherein: the specific calculation method of the speed of the breaker in the movement process in the step 1.5 and the step 2.5 comprises the following steps:
the breaker just-divided speed is the average speed of the breaker within 0.01s just after the division:
wherein, the method comprises the steps of, wherein,L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the breaking speed of the breaker is the ratio of travel to time in the breaking process:
wherein, the method comprises the steps of, wherein,L3, shooting a travel track of a breaker contact at the opening time by a three-eye imager;
the breaker closing speed is the average speed of the breaker within 0.01s just before closing:
wherein, the method comprises the steps of, wherein,L1 is the travel track of the breaker contact within 0.01s immediately after separation;
the closing speed of the circuit breaker is the average speed in the action time in the closing process:
four speeds are obtained through a three-eye imager, and then the travel track of the breaker contact is obtained.
3. The reproduction method of the circuit breaker travel track reproduction apparatus based on the three-dimensional imaging principle according to claim 1, wherein: the method for reproducing the synchronization of the interrupt circuit breakers in the step 1.5 and the step 2.5 comprises the following steps: the closing synchronism is three-phase closing time t He A 、t He B 、t C combination The time difference between the two is the three-phase brake-separating time t Divide A 、t B part 、t C part Time difference between them.
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