CN113839372B - Failure starting loop risk control method for defect treatment of double protection device - Google Patents
Failure starting loop risk control method for defect treatment of double protection device Download PDFInfo
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- CN113839372B CN113839372B CN202111030474.7A CN202111030474A CN113839372B CN 113839372 B CN113839372 B CN 113839372B CN 202111030474 A CN202111030474 A CN 202111030474A CN 113839372 B CN113839372 B CN 113839372B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a failure starting loop risk control method for defect processing of a double protection device, which comprises the steps of designating one of a first relay protection device and a second relay protection device to normally operate, and executing defect processing on the other relay protection device; before defect treatment, the hard pressing plates with the protection functions on the control operation box and the defect treatment protection device are withdrawn; after the defect treatment is finished, the voltages of the three-phase protection function hard pressing plates on the specified defect treatment protection device on the corresponding first voltage measurement positions are measured and all meet the first preset conditions, and then the three-phase protection function hard pressing plates are controlled to enter into the input; and after the voltage of the hard pressing plate with the protection function on the operation box on the corresponding second voltage measuring position is measured and the second preset condition is met, the hard pressing plate with the protection function on the operation box is controlled to enter into input. By implementing the invention, the operation sequence or the switching/backing state of the connecting sheet of the protection starting failure outlet loop is checked, so that the artificial power grid accident caused by the false starting of the failure protection loop is avoided.
Description
Technical Field
The invention relates to the technical field of relay protection, in particular to a failure starting loop risk control method for defect treatment of a double protection device.
Background
According to the rule of the power system, any power equipment is required to be protected by a relay protection device during operation, so that the system fault point can be effectively isolated when the primary equipment system fails, and the large-area power failure accident of the power grid is avoided.
At present, each power grid company is provided with a double relay protection device at intervals of the same operation power equipment with the voltage level of more than 220kV for protection, so that the tripping operation of a switch can be accurately controlled to isolate a fault point when a primary equipment system fails, and the safe and stable operation of the system is realized.
Considering that a plurality of transmission lines, main transformers and bus-tie intervals possibly exist in a transformer substation, only if a breaker failure happens at a specific interval, the breaker failure protection can be realized to isolate faults in a minimum range, and the breaker failure protection is required to be provided with a failure starting loop according to the intervals. The circuit breaker failure protection starting loop is an important component of circuit breaker failure protection, is one of the keys for ensuring the correct operation of the whole set of protection, has to be safe and reliable, should realize double discrimination, and prevents single condition from judging the circuit breaker failure and false starting caused by the condition that the protection contact is jammed and not returned or is touched by mistake, electrified by mistake and the like.
As shown in fig. 1, a schematic diagram of logic structure connection during normal operation of a circuit breaker failure protection starting circuit in the prior art is shown, wherein the circuit breaker failure protection starting circuit comprises a failure protection device M1, an overcurrent protection device M2, a first relay protection device M3 and a second relay protection device M4 for realizing double protection, an operation box operation circuit M5 for connecting other protection (such as bus protection, stability control device protection and the like), and a primary I bus disconnecting link 1YQJ and a primary II bus disconnecting link 2YQJ; the failure protection device M1 is connected to each phase protection contact of the first relay protection device M3 through the three-phase overcurrent protection contacts LJA, LJB1 and LJC1 of the overcurrent protection device M2, and then is closed to form a loop through the primary I bus-bar disconnecting link 1YQJ or the primary II bus-bar disconnecting link 2YQJ, and is also connected to each phase protection contact of the second relay protection device M4 through the three-phase overcurrent protection contacts LJA, LJB1 and LJC1 of the overcurrent protection device M2, and then is closed to form a loop through the primary I bus-bar disconnecting link 1YQJ or the primary II bus-bar disconnecting link 2YQJ, and is also connected to the operation box operation loop M5 through the three-phase overcurrent protection contacts LJA, LJB2 and LJC2 connected in series on the overcurrent protection device M2, and then is closed to form a loop through the primary I bus-bar disconnecting link 1YQJ or the primary II bus-bar disconnecting link 2 YQJ.
It should be noted that, each phase of the first relay protection device M3 and the second relay protection device M4 has a protection function hard pressing plate for controlling switching and a corresponding switch relay thereof, such as a switch relay TJA1 corresponding to an a-phase protection function hard pressing plate 1LP9, a switch relay TJB1 corresponding to a B-phase protection function hard pressing plate 1LP10, and a switch relay TJC1 corresponding to a C-phase protection function hard pressing plate 1LP11 in the first relay protection device M3, and a switch relay TJA2 corresponding to an a-phase protection function hard pressing plate 2LP9, a switch relay TJB2 corresponding to a B-phase protection function hard pressing plate 2LP10, and a switch relay TJC2 corresponding to a C-phase protection function hard pressing plate 2LP11 in the second relay protection device M4.
The operation box operation loop M5 includes a protection function hard pressure plate LP for controlling the switching and two relays TJQ and TJR which are correspondingly connected in parallel. The primary I busbar disconnecting link 1YQJ or the primary II busbar disconnecting link 2YQJ is respectively and correspondingly connected with a plurality of circuits.
Therefore, when the circuit breaker failure protection starting loop performs double protection, at least one set of relay protection device is ensured to normally operate so as to ensure that the primary equipment system fault protection cannot be refused.
At present, fault information is reported by field operators in advance in fault treatment of the relay protection device, and then the fault information is specifically known by technicians on the field and then treated, so that risk control is carried out before the fault treatment of the protection device.
In the prior art, the risk control method for defect treatment of the protection device only focuses on whether the operation sequence of the protection tripping outlet connecting piece is correct or the switching/switching vacuum phenomenon, but ignores the switching of the protection starting failure outlet circuit connecting piece, so that the loss of the protection circuit is easily started by mistake, and the artificial power grid accident is caused.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a failure starting loop risk control method for defect treatment of a double protection device, which is used for avoiding artificial power grid accidents caused by false starting of a failure protection loop by checking and protecting the operation sequence or the switching/backing state of a connecting sheet of a starting failure outlet loop.
In order to solve the technical problems, an embodiment of the present invention provides a failure starting circuit risk control method for defect treatment of a duplex protection device, which is used for a breaker failure protection starting circuit including a failure protection device, an overcurrent protection device, a first relay protection device, a second relay protection device, an operation box operation circuit, a primary I bus disconnecting link and a primary II bus disconnecting link, and the method includes the following steps:
designating one of the first relay protection device and the second relay protection device to normally operate, and executing defect processing on the other one;
before the specified defect processing protection device performs defect processing, controlling the protection function hard pressing plate on the operation loop of the operation box to be in an exit state initially, and controlling the three-phase protection function hard pressing plate on the specified defect processing protection device to be in an exit state initially;
after the specified defect processing protection device finishes defect processing, combining a first voltage measurement position of a pre-defined three-phase protection function hard pressing plate, measuring the voltage of each three-phase protection function hard pressing plate on the specified defect processing protection device on the corresponding first voltage measurement position, and controlling the three-phase protection function hard pressing plates on the specified defect processing protection device to enter a throwing state from an exiting state after judging that the voltages of each measured three-phase protection function hard pressing plate on the corresponding first voltage measurement position meet a first preset condition;
and combining a second voltage measurement position of the protection function hard pressing plate on the operation circuit of the operation box, measuring the voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position, and controlling the protection function hard pressing plate on the operation circuit of the operation box to enter the input state from the exit state after judging that the voltage of the protection function hard pressing plate on the operation circuit of the measured operation box on the corresponding second voltage measurement position meets a second preset condition.
Wherein the method further comprises:
after the specified defect processing protection device finishes defect processing, if the voltage of a certain phase of protection function hard pressing plate on the measured specified defect processing protection device on the corresponding first voltage measurement position does not meet the first preset condition, performing defect checking and correction on the succession until the voltage of the phase of protection function hard pressing plate on the corresponding first voltage measurement position meets the first preset condition.
The first voltage measurement position is two ends of a three-phase protection function hard pressing plate on the protection device for the designated defect treatment;
the first preset condition is that the voltage to ground of one end of each phase of hard pressing plate close to the overcurrent protection device is smaller than or equal to a first preset voltage, and the voltage difference between two ends of each phase of hard pressing plate is smaller than or equal to a second preset voltage.
Wherein the first predetermined voltage is 0; the first predetermined voltage is 0.
Wherein the method further comprises:
after the specified defect processing protection device finishes defect processing, if the voltage of the protection function hard pressing plate on the operation circuit of the measured operation box on the corresponding second voltage measurement position is judged not to meet the second preset condition, continuing defect checking and correcting on the operation circuit of the operation box until the voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position meets the second preset condition.
The second voltage measuring position is two ends of a hard pressure plate with a protection function on the operation loop of the operation box;
the first preset condition is that the voltage to ground of one end of the hard pressure plate with the protection function, which is close to the overcurrent protection device, on the operation circuit of the operation box is smaller than or equal to a third preset voltage, and the voltage difference between the two ends of the hard pressure plate with the protection function on the operation circuit of the operation box is smaller than or equal to a fourth preset voltage.
Wherein the third predetermined voltage is 0; the fourth predetermined voltage is 0.
The embodiment of the invention has the following beneficial effects:
the invention is used for avoiding artificial power grid accidents caused by false starting of the failure protection loop by checking the operation sequence or the switching/backing state of the connection sheet of the protection starting failure outlet loop.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and it is still within the scope of the present invention to one of ordinary skill in the art to obtain other drawings from these drawings without inventive effort.
FIG. 1 is a schematic diagram showing the logic structure connection of a breaker failure protection starting circuit in the prior art when the circuit is normal;
fig. 2 is a flowchart of a failure start loop risk control method for defect handling of a dual protection device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 2, in the embodiment of the present invention, a failure starting circuit risk control method for defect treatment of a dual protection device is provided, which is used for a breaker failure protection starting circuit (as shown in fig. 1) including a failure protection device M1, an overcurrent protection device M2, a first relay protection device M3, a second relay protection device M4, an operation box operation circuit M5, a primary I bus bar knife 1YQJ and a primary II bus bar knife 2YQJ, wherein the specific structure of the breaker failure protection starting circuit is existing, please refer to the prior art.
In the embodiment of the invention, the failure starting loop risk control method for defect treatment of the double protection device comprises the following steps:
step S1, one of the first relay protection device and the second relay protection device is designated to normally operate, and the other one of the first relay protection device and the second relay protection device is designated to execute defect processing;
step S2, before the specified defect processing protection device performs defect processing, controlling the protection function hard pressing plates on the operation loop of the operation box to be in an exit state initially, and controlling the three-phase protection function hard pressing plates on the specified defect processing protection device to be in an exit state initially;
step S3, after the protection device for the specified defect treatment finishes the defect treatment, the first voltage measuring positions of the three-phase protection function hard pressing plates are combined, the voltages of the three-phase protection function hard pressing plates on the protection device for the specified defect treatment on the corresponding first voltage measuring positions are measured, and after the voltages of the measured three-phase protection function hard pressing plates on the corresponding first voltage measuring positions are judged to meet the first preset conditions, the three-phase protection function hard pressing plates on the protection device for the specified defect treatment are controlled to enter the input state from the exit state;
and S4, combining a second voltage measurement position of the protection function hard pressing plate on the operation circuit of the operation box, measuring the voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position, and controlling the protection function hard pressing plate on the operation circuit of the operation box to enter the input state from the exit state after judging that the measured voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position meets a second preset condition.
In step S1, one of the first relay protection device M3 and the second relay protection device M4 is designated to continue to operate normally, and the other one of the first relay protection device M3 and the second relay protection device M4 is designated to execute defect processing, so that when the defect processing is executed in the circuit breaker failure protection starting loop, one relay protection device should operate normally to ensure that the failure protection of the primary equipment system cannot be refused.
For example, when the first relay protection device M3 performs defect processing, the second relay protection device M4 continues to keep operating normally; or when the second relay protection device M4 executes defect processing, the first relay protection device M3 continues to keep normal operation.
In step S2, before the protection device for the specified defect processing performs the defect processing, the protection function hard pressing plate LP on the control box operation circuit M5 is controlled to be in an exit state initially, and the three-phase protection function hard pressing plate on the protection device for the specified defect processing is controlled to be in an exit state initially.
For example, when the hard pressing plate LP with the protection function on the operation circuit M5 of the operation box is initially in the exit state and the first relay protection device M3 is a protection device for the designated defect treatment, the hard pressing plate 1LP9 with the protection function of a phase, the hard pressing plate 1LP10 with the protection function of B phase and the hard pressing plate 1LP11 with the protection function of C phase on the first relay protection device M3 are all initially in the exit state.
In step S3, firstly, after the protection device for specified defect processing completes defect processing, according to the principle that the first voltage measurement position defined in advance is two ends of the three-phase protection function hard pressing plate on the protection device for specified defect processing, measuring the voltages of the three-phase protection function hard pressing plates on the protection device for specified defect processing on the corresponding first voltage measurement positions; for example, the hard pressing plate with each phase of protection function is close to the ground voltage at one end of the overcurrent protection device M2; as another example, each phase protects the voltage difference between the two ends of the functional hard platen.
And secondly, after judging that the voltages of the measured three-phase hard pressing plates on the corresponding first voltage measuring positions meet the first preset conditions, controlling the three-phase hard pressing plates on the protection device for the designated defect treatment to enter the input state from the exit state. For example, the first predetermined condition is that the voltage to ground at the end of each phase protection function hard pressing plate near the overcurrent protection device M2 is less than or equal to a first predetermined voltage (e.g. 0), and the voltage difference between the two ends of each phase protection function hard pressing plate is less than or equal to a second predetermined voltage (e.g. 0). It can be understood that, because the three-phase protection function hard pressing plates on the protection device for the designated defect treatment are all in the exit state initially, only the voltage is 0, the normal operation of the three-phase protection function hard pressing plates, such as the switching and wiring, is indicated, and then the normal operation can be realized only after that.
In one embodiment, when the first relay protection device M3 is a protection device for the designated defect treatment, the ground voltage of the a-phase protection function hard pressing plate 1LP9 on the first relay protection device M3 near one end of the overcurrent protection device M2 is 0, the voltage difference between the two ends is also 0, the ground voltage of the B-phase protection function hard pressing plate 1LP10 near one end of the overcurrent protection device M2 is 0, the voltage difference between the two ends is also 0, the ground voltage of the C-phase protection function hard pressing plate 1LP11 near one end of the overcurrent protection device M2 is 0, the voltage difference between the two ends is also 0, and then all of the a-phase protection function hard pressing plate 1LP9, the B-phase protection function hard pressing plate 1LP10 and the C-phase protection function hard pressing plate 1LP11 enter the put-in state in an exit state.
It should be noted that, after the protection device for specified defect processing completes defect processing, if it is determined that the voltage of a certain phase of the hard pressure plate for protection function on the protection device for specified defect processing on the measured protection device for specified defect processing does not meet the first predetermined condition on the corresponding first voltage measurement position, defect inspection and correction are performed successively until the voltage of the hard pressure plate for protection function on the phase on the corresponding first voltage measurement position meets the first predetermined condition.
In one embodiment, when the first relay protection device M3 is a protection device for the designated defect treatment, if the voltage to ground of the end of the hard pressing plate 1LP9 of the a-phase protection function on the first relay protection device M3 near the overcurrent protection device M2 is not 0 or the voltage difference between the two ends is not 0, further checking the cause is needed, correcting the defect until the voltage to ground of the end of the hard pressing plate 1LP9 of the a-phase protection function on the first relay protection device M3 near the overcurrent protection device M2 is 0 and the voltage difference between the two ends is also 0, and then the hard pressing plates 1LP9 of the a-phase protection function, the hard pressing plate 1LP10 of the B-phase protection function and the hard pressing plate 1LP11 of the C-phase protection function are all put into the put-into-state in the state.
In step S4, firstly, according to the principle that the predefined second voltage measurement position is the two ends of the hard pressure plate LP with the protection function on the operation box operation circuit M5, the voltage of the hard pressure plate LP with the protection function on the operation box operation circuit M5 on the corresponding second voltage measurement position is measured; for example, the hard pressure plate LP with the protection function on the operation circuit M5 of the operation box is close to the ground voltage at one end of the overcurrent protection device M2; as another example, the operator box operates the voltage difference between the two ends of the hard platen LP for the protection function on the circuit M5.
And secondly, after judging that the voltage of the protective function hard pressing plate LP on the measured operation box operation circuit M5 at the corresponding second voltage measurement position meets a second preset condition, controlling the protective function hard pressing plate LP on the operation box operation circuit M5 to enter the input state from the exit state. For example, the second predetermined condition is that the voltage to ground of the end of the protection function hard pressing plate LP near the overcurrent protection device M2 is less than or equal to a third predetermined voltage (e.g. 0), and the voltage difference between the two ends of the protection function hard pressing plate LP is less than or equal to a fourth predetermined voltage (e.g. 0). It can be understood that, since the hard pressure plate LP with the protection function is initially in the exit state, only the voltage is 0, which indicates that the hard pressure plate LP with the protection function is normally put into the entry state after the normal operation, such as the switching and the wiring.
It should be noted that, after the protection device for the specified defect processing completes the defect processing, if it is determined that the voltage of the protection function hard pressing plate LP on the measured operation box operation circuit M5 at the corresponding second voltage measurement position does not meet the second predetermined condition, defect checking and correction are continuously performed on the operation box operation circuit M5 until the voltage of the protection function hard pressing plate LP on the operation box operation circuit M5 at the corresponding second voltage measurement position meets the second predetermined condition.
In one embodiment, the voltage to ground of the end of the hard protection plate LP of the operation box operation circuit M5 near the overcurrent protection device M2 is not 0 or the voltage difference between the two ends is not 0, so that further inspection of the cause is required, and the defect is corrected until the voltage to ground of the end of the hard protection plate LP of the operation box operation circuit M5 near the overcurrent protection device M2 is 0 and the voltage difference between the two ends is also 0, and then the hard protection plate LP of the operation box operation circuit M5 is put into the put-in state from the out state.
Based on fig. 1, an application scenario of a failure start loop risk control method for defect processing of a duplex protection apparatus in an embodiment of the present invention is further described:
if the defect treatment of the first relay protection device M3 is designated, keeping the second relay protection device M4 to continue to operate, wherein the specific risk control process is as follows;
step 1: performing defect treatment on the first relay protection device M3, and when the second relay protection device M4 is kept to run continuously, firstly, withdrawing the hard pressing plate LP with the protection function on the operation circuit M5 of the operation box;
step 2: before the defect treatment of the first relay protection device M3, the protection function hard pressing plate on the starting failure outlet loop of the first relay protection device M3 is used for: all of the A phase 1LP9, the B phase 1LP10 and the C phase 1LP11 are from input to exit;
step 3: after the defect treatment of the first relay protection device M3 is finished, before any phase of protection function hard pressing plates on the first relay protection device M3 are put into operation, the protection function hard pressing plates on a failure starting outlet loop on the first relay protection device M3 are measured firstly: whether the potential difference between one end of the phase A1 LP9, the phase B1 LP10 and the phase C1 LP11, which are close to the overcurrent protection device M2, to the ground potential meets a first preset condition or not, and if not, further checking the reason until finding out;
step 4: if both the protection functions are normal, starting the hard pressing plate with the protection function on the failure outlet loop on the first relay protection device M3: all of phase A1 LP9, phase B1 LP10 and phase C1 LP11 are withdrawn to input;
step 5: measuring whether the potential difference between one end of the hard pressing plate LP of the protection function on the operation loop M5 of the operation box, which is close to the overcurrent protection device M2, and the ground potential and the two ends meets a second preset condition or not, and if not, further checking the reason until finding out; if yes, the hard pressure plate LP with the protection function on the operation circuit M5 of the operation box is withdrawn to be put into.
Similarly, if the defect treatment of the second relay protection device M4 is designated, the first relay protection device M3 is kept to continue to operate, and the specific risk control process is as follows;
step 1: performing defect treatment on the second relay protection device M4, and when the first relay protection device M3 is kept to run continuously, firstly, withdrawing the hard pressing plate LP with the protection function on the operation circuit M5 of the operation box;
step 2: before the defect treatment of the second relay protection device M4, the protection function hard pressing plate on the starting failure outlet loop of the second relay protection device M4 is used for: all of the A phase 2LP9, the B phase 2LP10 and the C phase 2LP11 are from input to exit;
step 3: after the defect treatment of the second relay protection device M4 is finished, before any phase of protection function hard pressing plates on the second relay protection device M4 are put into operation, the protection function hard pressing plates on a failure start outlet loop on the second relay protection device M4 are measured firstly: whether the potential difference between one end of the phase A2 LP9, the phase B2 LP10 and the phase C2 LP11, which are close to the overcurrent protection device M2, to the ground potential meets a first preset condition or not, if not, the reason is required to be further checked until the reason is found;
step 4: if both the protection functions are normal, the protection function hard pressing plate on the starting failure outlet loop of the second relay protection device M4 is used for pressing: phase A2 LP9, phase B2 LP10 and phase C2 LP11 are all from the withdrawal to the input;
step 5: measuring whether the potential difference between one end of the hard pressing plate LP of the protection function on the operation loop M5 of the operation box, which is close to the overcurrent protection device M2, and the ground potential and the two ends meets a second preset condition or not, and if not, further checking the reason until finding out; if yes, the hard pressure plate LP with the protection function on the operation circuit M5 of the operation box is withdrawn to be put into.
The embodiment of the invention has the following beneficial effects:
the invention is used for avoiding artificial power grid accidents caused by false starting of the failure protection loop by checking the operation sequence or the switching/backing state of the connection sheet of the protection starting failure outlet loop.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the above embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. The utility model provides a failure starting circuit risk control method of duel protection device defect treatment, is used for including failure protection device, overcurrent protection device, first relay protection device, second relay protection device, operation box operation circuit, once I bus switch and once II bus switch's circuit breaker failure protection starting circuit, its characterized in that, the method includes following steps:
designating one of the first relay protection device and the second relay protection device to normally operate, and executing defect processing on the other one;
before the specified defect processing protection device performs defect processing, controlling the protection function hard pressing plate on the operation loop of the operation box to be in an exit state initially, and controlling the three-phase protection function hard pressing plate on the specified defect processing protection device to be in an exit state initially;
after the specified defect processing protection device finishes defect processing, combining a first voltage measurement position of a pre-defined three-phase protection function hard pressing plate, measuring the voltage of each three-phase protection function hard pressing plate on the specified defect processing protection device on the corresponding first voltage measurement position, and controlling the three-phase protection function hard pressing plates on the specified defect processing protection device to enter a throwing state from an exiting state after judging that the voltages of each measured three-phase protection function hard pressing plate on the corresponding first voltage measurement position meet a first preset condition;
the method comprises the steps of combining a second voltage measurement position of a protection function hard pressing plate on an operation circuit of an operation box, measuring the voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position, and controlling the protection function hard pressing plate on the operation circuit of the operation box to enter a throwing state from an exiting state after judging that the voltage of the protection function hard pressing plate on the operation circuit of the measured operation box on the corresponding second voltage measurement position meets a second preset condition;
wherein the method further comprises:
after the specified defect processing protection device finishes defect processing, if the voltage of a certain phase of protection function hard pressing plate on the specified defect processing protection device is judged not to meet the first preset condition on the corresponding first voltage measurement position, continuing defect checking and correcting on the phase of protection function hard pressing plate until the voltage of the phase of protection function hard pressing plate on the corresponding first voltage measurement position meets the first preset condition;
wherein the method further comprises:
after the specified defect processing protection device finishes defect processing, if the voltage of the protection function hard pressing plate on the operation circuit of the measured operation box on the corresponding second voltage measurement position is judged not to meet the second preset condition, continuing defect checking and correcting on the operation circuit of the operation box until the voltage of the protection function hard pressing plate on the operation circuit of the operation box on the corresponding second voltage measurement position meets the second preset condition.
2. The failure start-up loop risk control method for defect handling of a double protection device according to claim 1, wherein the first voltage measurement position is two ends of a three-phase protection function hard pressing plate on the protection device for specified defect handling;
the first preset condition is that the voltage to ground of one end of each phase of hard pressing plate close to the overcurrent protection device is smaller than or equal to a first preset voltage, and the voltage difference between two ends of each phase of hard pressing plate is smaller than or equal to a second preset voltage.
3. The failure start-up loop risk control method for defect handling of a double protection device according to claim 2, wherein the first predetermined voltage is 0; the first predetermined voltage is 0.
4. The failure start-up loop risk control method for defect handling of a double protection device according to claim 1, wherein the second voltage measurement position is two ends of a hard pressure plate with a protection function on an operation loop of the operation box;
the second preset condition is that the voltage to ground of one end of the hard pressure plate with the protection function, which is close to the overcurrent protection device, on the operation circuit of the operation box is smaller than or equal to a third preset voltage, and the voltage difference between the two ends of the hard pressure plate with the protection function on the operation circuit of the operation box is smaller than or equal to a fourth preset voltage.
5. The failure start-up loop risk control method for defect handling of a double protection device according to claim 4, wherein the third predetermined voltage is 0; the fourth predetermined voltage is 0.
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| CN202111030474.7A CN113839372B (en) | 2021-09-03 | 2021-09-03 | Failure starting loop risk control method for defect treatment of double protection device |
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| EP3002850A1 (en) * | 2014-10-02 | 2016-04-06 | SK Innovation Co., Ltd. | Overcharge protection device and method including diagnostic function |
| CN109327014A (en) * | 2018-08-22 | 2019-02-12 | 贵州电网有限责任公司 | Risky pressing plate anti-miscarrying method is directed to when a kind of circuit relay protection regular inspection |
| CN110542826A (en) * | 2019-09-23 | 2019-12-06 | 深圳供电局有限公司 | On-site calibration method for failure protection starting circuit of power grid transmission line breaker |
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2021
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002850A1 (en) * | 2014-10-02 | 2016-04-06 | SK Innovation Co., Ltd. | Overcharge protection device and method including diagnostic function |
| CN109327014A (en) * | 2018-08-22 | 2019-02-12 | 贵州电网有限责任公司 | Risky pressing plate anti-miscarrying method is directed to when a kind of circuit relay protection regular inspection |
| CN110542826A (en) * | 2019-09-23 | 2019-12-06 | 深圳供电局有限公司 | On-site calibration method for failure protection starting circuit of power grid transmission line breaker |
Non-Patent Citations (1)
| Title |
|---|
| 220kV断路器失灵起动回路设计缺陷与改进措施研究;贾宏伟;;黑龙江科技信息(第03期);全文 * |
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