CN108631439B - Method for searching remote control opening and closing operation fault of circuit breaker - Google Patents
Method for searching remote control opening and closing operation fault of circuit breaker Download PDFInfo
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- CN108631439B CN108631439B CN201810384805.9A CN201810384805A CN108631439B CN 108631439 B CN108631439 B CN 108631439B CN 201810384805 A CN201810384805 A CN 201810384805A CN 108631439 B CN108631439 B CN 108631439B
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000012546 transfer Methods 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 238000013024 troubleshooting Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- H02J13/0006—
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/263—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 involving signal transmission between at least two stations involving transmissions of measured values
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a method for searching faults of remote control opening and closing operation of a circuit breaker. The method comprises the following steps: whether the remote control end operation fault of the circuit breaker exists or not is checked, if yes, debugging is carried out, and if the remote control opening and closing operation is not successful after debugging, a remote local transfer switch of the circuit breaker is checked; if the remote local change-over switch is located at a remote position, the remote local change-over switch is changed to a local position, and the opening and closing switch is operated on site to see whether the opening and closing are successful or not; if the on-site operation of the opening and closing switch is not successful, whether an opening and closing coil of the circuit breaker is electrified and attracted is checked, and if the opening and closing coil can be electrified and attracted and the opening and closing operation is unsuccessful, a fault point is in a primary operation mechanism of the circuit breaker; if the opening and closing coils are not electrified and attracted, sequentially checking whether the voltage of the direct-current control power supply is normal or not and whether a circuit breaker control loop is broken or not; and if the on-site operation of the opening and closing switches is successful, the remote control opening and closing control circuit is checked. The invention has high searching efficiency and can ensure the stable operation of equipment.
Description
Technical Field
The invention relates to the technical field of high-voltage circuit breaker opening and closing operation fault processing, in particular to a method for searching remote opening and closing operation faults of a circuit breaker.
Background
With the rapid development of automation control technology, communication technology and network technology, remote operation technology is widely applied to power grid dispatching automation systems. Remote control plays an important role in optimizing the operation mode of the power grid, improving the operation efficiency and the power supply quality, processing emergency fault accidents, ensuring the safe and stable operation of the power grid and the like. However, the unsafe state of network communication, the faults of the circuit breaker electrical control circuit, the circuit breaker operation executing mechanism, the relay protection measurement and control device and the like, and the human misoperation and the like often cause unsuccessful remote control switching-on and switching-off operation, and cause unnecessary troubles to the operation and daily safe operation of the power supply equipment.
Therefore, for a fault that the remote control opening and closing operation of the circuit breaker is unsuccessful, a method for searching the remote control opening and closing operation fault of the circuit breaker is urgently needed, a remote control operation fault point can be quickly searched, and the safe and stable operation of a power supply system is ensured, so that the method is very important.
Disclosure of Invention
The invention aims to provide a method for searching for the fault of the remote control opening and closing operation of a circuit breaker, which is used for searching and solving the fault causing unsuccessful remote control opening and closing operation of the circuit breaker.
In order to solve the technical problems, the invention discloses the following technical scheme:
a method for searching faults of remote control opening and closing operation of a circuit breaker is provided. The method for searching the remote switching-on and switching-off operation fault of the circuit breaker comprises the following steps:
checking whether the remote control end of the breaker is in operation fault or not, if so, debugging, and if the remote control opening and/or closing operation is not successfully executed after debugging, checking a remote local transfer switch of the breaker;
if the remote on-site change-over switch is located in a remote position, the remote on-site change-over switch is changed to an on-site position, and the opening switch and the closing switch are operated on site to see whether the opening and closing of the breaker are successful or not;
if the field operation of the opening switch and/or the closing switch is unsuccessful, checking whether an opening coil and/or a closing coil of the circuit breaker is normally electrified and attracted, and if the opening coil and/or the closing coil can be normally electrified and attracted and the opening and/or closing operation is unsuccessful, determining that a fault point is in a primary operation mechanism of the circuit breaker; if the opening coil and/or the closing coil cannot be normally electrified and sucked, whether the voltage of the direct current control power supply is normal or not and whether a circuit breaker control loop is broken or not are sequentially checked;
and if the field operation of the opening switch and the closing switch is successful, the fault of the remote control opening and closing control circuit is checked.
For the method for searching the remote control opening and closing operation fault of the circuit breaker, the checking whether the operation fault is the remote control end operation fault of the circuit breaker or not, and if the operation fault is the remote control end operation fault, the debugging further comprises the following steps:
checking whether the remote control check error exists in a background monitor;
checking whether the remote control is overtime;
it is checked whether the remote control execution is unsuccessful.
For the method for searching the remote control opening and closing operation fault of the circuit breaker, the step of checking whether the remote control check error exists in the background monitoring machine further comprises the following steps:
if the remote control verification error is reported during the remote control operation, checking whether the name of the high-voltage switch cabinet where the breaker to be remotely controlled is located, the number and the password of the high-voltage switch cabinet are correct and whether the name corresponds to the definition in the system of the background monitor;
if the definition of the point number of the remote control object in the system is wrong, the definition of the point number is modified to be wrong, and if the definition of the point number of the remote control object in the system is not wrong, the name, the number and the password are input again correctly.
For the method for searching the remote control opening and closing operation fault of the circuit breaker, the checking whether the operation fault is remote control overtime further comprises the following steps: if the background monitor reports that the remote control is overtime, whether the transmission quality of the carrier communication signal is poor and whether the carrier communication channel is interfered are checked.
For the method for searching the remote control opening and closing operation fault of the circuit breaker, the checking whether the remote control execution is unsuccessful further comprises: if the background monitor reports that the remote control execution is unsuccessful, whether a remote local transfer switch operating handle on a field high-voltage switch cabinet or a main transformer protection screen is in a remote position or not is checked.
For the method for searching the remote-control opening and closing operation fault of the circuit breaker, if the field operation of the opening switch and/or the closing switch is still unsuccessful, whether the opening coil and/or the closing coil of the circuit breaker is normally electrified and sucked is checked, and the method further comprises the following steps:
if the field operation of the closing switch is unsuccessful, whether a closing coil is normally electrified and closed or not is checked at the closing and power transmission moment of the breaker;
if the field operation of the opening switch is unsuccessful, whether the opening coil is normally electrified and attracted is checked at the moment of opening power transmission of the breaker.
For the method for searching the remote switching-on and switching-off operation fault of the circuit breaker, the checking whether the voltage of the direct-current control power supply is normal further comprises the following steps: and checking whether the voltage of the direct current control power supply is 220V or not, and the voltage of the normal operation working power supply is not lower than 220V and 85% at minimum.
For the method for searching the remote-control opening and closing operation fault of the circuit breaker, the step of checking whether the control loop of the circuit breaker is broken further comprises the following steps:
checking whether the microcomputer protection measurement and control device reports fault information of the broken line of the control loop;
if the fault information of the broken line of the control loop is reported, for the closing electric loop, whether a normally closed contact of an auxiliary switch of the circuit breaker is closed, whether a handcart type circuit breaker is at a working position, whether a spring full energy storage contact of a spring energy storage operating mechanism is closed, whether a resistance of a closing coil is normal and whether a connection loop between related elements is broken; for the opening electrical loop, sequentially checking whether a normally open contact of an auxiliary switch of the circuit breaker is closed, whether the resistance of an opening coil is normal and whether the connection loop between all related elements is broken;
if the microcomputer protection measurement and control device does not report the fault information of the control circuit disconnection, the fault is the fault of an electric coding lock or a remote local transfer switch or an opening and closing control operation plug-in board of the microcomputer protection measurement and control device.
For the method for searching the fault of the remote control opening and closing operation of the circuit breaker, the remote control opening and closing control circuit comprises a remote local transfer switch, a remote control opening and closing hard pressing plate, a remote control closing relay and a contact of the remote control opening and closing relay;
the fault of the remote control opening and closing control circuit is checked further comprising: and sequentially checking whether a remote contact of the remote local transfer switch and a wiring thereof work normally, whether the remote control opening and closing hard pressing plate is connected normally, and whether the contact of the remote control closing relay and/or the contact of the remote control opening relay are closed.
For the method for searching the remote control opening and closing operation fault of the circuit breaker, the step of checking whether the contact of the remote control closing relay and/or the contact of the remote control opening relay are closed further comprises the following steps:
when remote control opening and closing operations are executed, whether the voltage of a connecting terminal connected with a remote control contact of a remote control closing relay and the voltage of a connecting terminal connected with the remote control contact of the remote control opening relay are normal or not is respectively tested, and the normal voltage is direct current 110V;
if the voltage of the wiring terminal connected with the remote control contact of the remote control closing relay and/or the voltage of the wiring terminal connected with the remote control contact of the remote control opening relay is abnormal, the microcomputer protection measurement and control device is restarted, after restarting, if the remote control operation can be executed, the fault is the jamming of the contact of the remote control closing relay and/or the contact of the remote control opening relay in the last action process, if the restarting is not successful, the contact of the remote control closing relay and/or the contact of the remote control opening relay are/is damaged, and the corresponding plug-in boards are replaced.
The technical scheme of the invention has the following main advantages:
the method for searching the remote control opening and closing operation fault of the circuit breaker solves the problem that the remote control opening and closing operation is unsuccessful due to the defects of a network communication system, an electric control circuit of the circuit breaker, an operation executing mechanism of the circuit breaker, a relay protection measurement and control device and the like, and human misoperation and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention by way of example only and are not to be construed as limiting the embodiments of the invention in any way. In the drawings:
fig. 1 is a schematic diagram of a typical remote-control opening and closing electric control circuit of a circuit breaker in the prior art;
fig. 2 is a flowchart of a method for searching for a fault in the remote switching-on/off operation of a circuit breaker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
Fig. 1 is a schematic diagram of a typical remote-control opening and closing electric control circuit of a circuit breaker in the prior art. In order to more clearly illustrate the technical scheme of the invention, firstly, the principle of the remote control opening and closing electric control circuit of the circuit breaker and the working process thereof are introduced.
As shown in fig. 1, the following conditions should be first provided before the circuit breaker is switched on and power is transmitted: 1) the direct-current power switch 1DK normally supplies power, and the voltage of the direct-current working power supply KM is normally 220V; 2) when the circuit breaker such as a handcart type circuit breaker is in a working position, the working position normally open contact S9 is connected; 3) the auxiliary normally closed contact QF1 of the circuit breaker is turned on (when the circuit breaker is in the opening position, the contact is closed); 4) after the spring is fully charged, the spring charging normally open contact SP1 is connected.
When the circuit breaker is selected to be switched on and off remotely, the operating handle of the remote local change-over switch 1QK is in a remote position, contacts of a remote switch-on and switch-off loop of the remote local change-over switch 1QK are closed, contacts of a local switch-on loop are opened, and contacts of a local switch-off loop are opened. Clicking an icon of the circuit breaker on a background monitor, entering a switching value page, clicking remote control, verifying a remote control name, inputting a scheduling number, entering remote control selection, clicking permission remote control, and starting remote control opening and closing operation after the five-prevention program is verified. When the remote control closing operation is carried out, the normally open contact of the remote control closing relay YHJ is closed, the closing coil HQ is electrified, the electromagnet is attracted to act and touch the primary operation mechanism of the circuit breaker, and finally the closing operation of the circuit breaker is successfully completed.
Similarly, when the remote control opening operation is carried out, the normally open contact of the remote control opening relay YTJ is closed, the opening coil TQ is electrified, the electromagnet attracts and acts to touch the primary operating mechanism of the circuit breaker, and finally the opening operation of the circuit breaker is successfully completed.
The circuit breaker remote control opening and closing electric control loop at least comprises a coil of a closing relay HBJ and a self-holding contact thereof, a coil of an opening relay TBJ and a self-holding contact thereof, an opening position monitoring relay coil TWJ, an opening position monitoring relay coil HWJ, a protection tripping outlet relay contact BTJ, a first opening position monitoring indicator lamp HG, a second opening position monitoring indicator lamp LD, a first opening position monitoring indicator lamp HR, a second opening position monitoring indicator lamp HD, a remote control opening and closing hard pressing plate 1LP2, a protection tripping hard pressing plate 1LP3 and an electric coding lock 1S. The first opening position monitoring indicator light HG can be a green light positioned on a microcomputer protection measurement and control device, the second opening position monitoring indicator light LD can be a green light positioned on a control cabinet door panel of the high-voltage switch cabinet, the first closing position monitoring indicator light HR can be a red light positioned on the microcomputer protection measurement and control device, and the second closing position monitoring indicator light HD can be a red light positioned on the control cabinet door panel of the high-voltage switch cabinet. The second opening position monitoring indicator lamp LD and the second closing position monitoring indicator lamp HD are respectively connected in series with another set of normally closed contacts QF3 and another set of normally open contacts QF4 of the circuit breaker.
Fig. 2 is a flowchart of a method for searching for a fault in the remote switching-on/off operation of a circuit breaker according to an embodiment of the present invention. Taking the circuit breaker remote control switching-on and switching-off electric control circuit shown in fig. 1 as an example, as shown in fig. 2, the method for searching for the fault of the circuit breaker remote control switching-on and switching-off operation provided by the embodiment includes the following steps:
and step S1, checking whether the operation fault is the remote control end operation fault of the breaker, if so, debugging, and if the remote control opening and/or closing operation is not successful after debugging, checking the remote local transfer switch 1QK of the breaker. The specific process of step S1 is as follows:
in step S11, the background monitor checks whether the remote control is verified to be erroneous. If the remote control verification error is reported during the remote control operation, checking whether the name of the high-voltage switch cabinet where the breaker to be remotely controlled is located, the number and the password of the high-voltage switch cabinet are correct and whether the name corresponds to the definition in the system of the background monitor. If the definition of the point number of the remote control object in the system is wrong, the point number definition is modified to be wrong. If the definition of the point number of the remote control object in the background monitor system is not wrong, the name, the number and the password need to be input again correctly.
In step S12, it is checked whether or not the remote timeout occurs. If the background monitor reports that the remote control is overtime, whether the transmission quality of the carrier communication signal is poor or whether the communication is abnormal due to the interference of the carrier communication channel needs to be checked.
And step S13, checking whether the remote control execution is unsuccessful, and if the background monitor reports that the remote control execution is unsuccessful, checking whether a remote local transfer switch operating handle on a field high-voltage switch cabinet or a main transformer protection screen is at a remote position.
And step S2, if the remote local transfer switch 1QK is located at a remote position, the remote local transfer switch 1QK is transferred to a local position, and the opening switch and the closing switch are operated on site to see whether the opening and closing of the breaker are successful. The specific process of step S2 is as follows:
if the remote local transfer switch operating handle is at the local position, the remote local position is transferred to the remote position, then remote control opening and/or closing operation is carried out, and the process is finished if the remote control opening and closing operation is successful. The remote on-site change-over switch operating handle corresponding to the circuit breaker of the feed-out high-voltage switch cabinet is positioned on the on-site high-voltage switch cabinet, and the remote on-site change-over switch operating handle corresponding to the circuit breaker of the main transformer is positioned on the microcomputer protection measurement and control screen of the main transformer in the control room.
If the remote local change-over switch operating handle is already at the far position, the remote local change-over switch operating handle is changed from the far position to the local position, namely, the remote opening and closing circuit contacts of the remote local change-over switch 1QK are disconnected, the local closing circuit contacts are closed, and then the local manual closing operation is carried out; when the on-site opening operation is carried out, the contacts ninthly and the coke side of the on-site opening loop are closed, and then the on-site manual opening operation is carried out.
Step S3, if the on-site operation of the opening switch and/or the closing switch is still unsuccessful, checking whether an opening coil TQ and/or a closing coil HQ of the circuit breaker are normally powered and attracted, if the opening coil TQ and/or the closing coil HQ can be normally powered and attracted, and the opening and/or closing operation is unsuccessful, indicating that a fault point is in a primary operation mechanism of the circuit breaker; if the opening and/or closing coil can not be normally electrified and closed, whether the voltage of the direct current control power supply is normal or not and whether the control loop of the circuit breaker is broken or not are sequentially checked. The specific process of step S3 is as follows:
and step S31, if the on-site operation of the closing switch is unsuccessful, whether the closing coil HQ is normally powered on and attracted to operate or not is checked at the closing and power transmission moment of the circuit breaker, and if the on-site operation of the opening switch is unsuccessful, whether the opening coil TQ is normally powered on and attracted to operate or not is checked at the opening and power transmission moment of the circuit breaker.
Step S32, if the brake separating coil TQ and the brake closing coil HQ are normally electrified and attracted, and the brake separating and/or closing operation is unsuccessful, indicating that the fault point is in primary equipment such as an operating mechanism of the circuit breaker; if the brake separating coil TQ and/or the closing coil HQ are not normally electrified and pulled in, the step 33 of checking whether the direct current control power supply voltage is normal and the step 34 of checking whether the circuit breaker control loop is disconnected are sequentially executed.
In step S33, it is checked whether the dc control power supply voltage is normal. Checking whether the DC control power supply voltage is 220V, and the normal operation working power supply voltage can not be lower than 220V 85% at least. Wherein, the voltage of the direct current control power supply can be checked by using a multimeter voltage level.
Step S34, checking whether the microcomputer protection measurement and control device reports the fault information of the control loop disconnection. If the fault information of the control loop disconnection is reported, the step S35 is executed. If the microcomputer protection measurement and control device does not report the fault information of the control circuit disconnection, the fault is the fault of the electric coding lock 1S or the remote local change-over switch 1QK or the switching-on/off control operation plug-in board of the microcomputer protection measurement and control device.
Further, the fault of the electric coding lock 1S or the remote local change-over switch 1QK or the switching-on/off control operation plug-in board of the microcomputer protection measurement and control device is checked, and the fault comprises the following steps: whether the electric coding lock 1S is inserted or not, whether the contacts of the local closing loop (first) and (second) and the connecting lines of the contacts of the local closing loop (ninc) and (r) of the local opening loop (1QK) of the remote local change-over switch and the connecting lines of the contacts of the local opening loop (ninc) and (r) of the local opening loop (ninc) work normally or not and whether the on-off control operation plug-in board of the microcomputer protection measurement and. The failure of the switching-on/off control operation plug-in board of the microcomputer protection measurement and control device refers to the failure of a component between a microcomputer protection wiring terminal 410 connected with a remote control contact YHJ and a microcomputer protection wiring terminal 411 connected with a switching-on relay HBJ, and a component between a microcomputer protection wiring terminal 408 connected with a remote control contact YTJ and a microcomputer protection wiring terminal 412 connected with a switching-off relay TBJ.
Step S35, for the closing electric loop, checking whether the normally closed contact QF1 of the auxiliary switch of the circuit breaker is closed, whether the normally open contact S9 of the circuit breaker such as a handcart type circuit breaker is closed at the working position, namely the working position, whether the fully stored spring energy contact SP1 of the spring energy storage operating mechanism is closed, whether the HQ resistor of the closing coil is normal and whether the connection loop between the related elements is connected well; for the opening electrical loop, whether a normally open contact QF2 of the auxiliary switch of the circuit breaker is closed, whether the resistance of the opening coil TQ is normal and whether the connection loop wiring between the related elements is good are sequentially checked.
And step S4, if the field operation of the opening and closing switches is successful, the fault of the remote control opening and closing control circuit is checked. The specific process for checking the fault of the remote control opening and closing control circuit is as follows:
the remote-control opening and closing control circuit comprises a remote-control on-site transfer switch 1QK, a remote-control opening and closing hard pressing plate 1LP2, a remote-control closing relay YHJ and a contact of a remote-control opening and closing relay YTJ. The method for checking the fault of the remote control opening and closing control circuit comprises the following steps: checking whether remote contacts of a remote local transfer switch 1QK in a remote control opening and closing control circuit are normal, whether the connection of a remote control opening and closing hard pressing plate 1LP2 is normal, and whether the contact of a remote control closing relay YHJ and/or the contact of a remote control opening relay YTJ are reliably closed.
At the moment of executing the remote switching-on and switching-off operation, whether the contact of the remote switching-on relay YHJ and/or the contact of the remote switching-off relay YTJ are reliably closed or not is detected, and a universal meter voltage level can be used for respectively testing whether a normal positive voltage exists on the microcomputer protection wiring terminal 410 connected with the remote control contact of the remote switching-on relay YHJ and/or the microcomputer protection wiring terminal 408 connected with the remote control contact of the remote switching-off relay YTJ, wherein the normal voltage is direct current 110V. If no normal voltage exists, the contact of the remote control closing relay YHJ and/or the contact of the remote control opening relay YTJ are/is blocked in the last action process, so that the microcomputer protection measurement and control device cannot be closed, at this time, the microcomputer protection measurement and control device is restarted once, if the remote control operation can be accurately executed after the restart, the fault is actually the contact of the remote control closing relay YHJ and/or the contact of the remote control opening relay YTJ, the problem is temporarily solved, and if the restart is not successful, the fault indicates that the contact of the remote control closing relay YHJ and/or the contact of the remote control opening relay YTJ are/is damaged and cannot be repaired, and the switching and closing control operation plug-in board of the microcomputer protection measurement and control device needs to be replaced.
The remote control opening and closing operation finding method for the circuit breaker solves the problem that remote control opening and closing operation is unsuccessful due to the defects of a network communication system, an electric control loop of the circuit breaker, an operation executing mechanism of the circuit breaker, a relay protection measurement and control device and the like, human misoperation and the like, solves the problems that a fault finding method for remote control opening and closing operation of the circuit breaker in the prior art is backward, the fault finding efficiency is low, and the safe and stable operation of power grid equipment is influenced, and can ensure the safe and stable operation of power supply equipment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for searching remote control opening and closing operation faults of a circuit breaker is characterized by comprising the following steps:
step S1, checking whether the operation fault is the remote control end operation fault of the breaker, if so, debugging, and if the remote control opening and/or closing operation is not successful after debugging, checking a remote local transfer switch (1QK) of the breaker;
whether the check is the remote control end operation fault of the circuit breaker, if so, debugging, and further comprising: checking whether the remote control check is wrong or not by a background monitor, checking whether the remote control is overtime or not, and checking whether the remote control execution is unsuccessful or not;
step S2, if the remote local transfer switch operating handle is at the local position, the remote local position is transferred to the remote position, then the remote control opening and/or closing operation is carried out, and the process is finished if the remote control opening and closing operation is successful; if the remote local transfer switch (1QK) is located at a remote position, the remote local transfer switch (1QK) is transferred to a local position, and the opening switch and the closing switch are operated on site to see whether the opening and closing of the breaker are successful or not;
step S3, if the on-site operation of the opening switch and/or the closing switch is still unsuccessful, checking whether the opening coil (TQ) and/or the closing coil (HQ) of the breaker is normally electrified and attracted, if the opening coil (TQ) and/or the closing coil (HQ) can be normally electrified and attracted and the opening and/or closing operation is unsuccessful, the fault point is at a primary operation mechanism of the breaker; if the opening coil and/or the closing coil cannot be normally electrified and sucked, whether the voltage of the direct current control power supply is normal or not and whether a circuit breaker control loop is broken or not are sequentially checked;
step S4, if the field operation of the opening and closing switches is successful, the fault of the remote control opening and closing control circuit is checked;
the remote-control opening and closing control circuit comprises a remote-control on-site transfer switch (1QK), a remote-control opening and closing hard pressing plate (1LP2), a remote-control closing relay (YHJ) and a contact of a remote-control opening and closing relay (YTJ);
the fault of the remote control opening and closing control circuit is checked further comprising: sequentially checking whether remote contacts (fifth and sixth) and wiring of a remote local transfer switch (1QK) work normally, whether connection of a remote control opening and closing hard pressing plate (1LP2) is normal, and whether a contact of a remote control closing relay (YHJ) and/or a contact of a remote control opening relay (YTJ) are closed;
the checking whether the contact of the remote closing relay (YHJ) and/or the contact of the remote opening relay (YTJ) are closed further comprises:
when remote control opening and closing operations are executed, whether the voltage of a connecting terminal (410) connected with a remote control contact of a remote control closing relay (YHJ) and the voltage of a connecting terminal (408) connected with the remote control contact of the remote control opening relay (YTJ) are normal or not is respectively tested, and the normal voltage is direct current (110V);
if the voltage of a connecting terminal (410) connected with a remote control contact of a remote control closing relay (YHJ) and/or a connecting terminal (408) connected with a remote control contact of a remote control opening relay (YTJ) is abnormal, the microcomputer protection measurement and control device is restarted, if remote control operation can be executed after restarting, the fault is that the contact of the remote control closing relay (YHJ) and/or the contact of the remote control opening relay (YTJ) are blocked in the last action process, if the remote control operation can not be executed after restarting successfully, the contact of the remote control closing relay (YHJ) and/or the contact of the remote control opening relay (YTJ) are damaged, and corresponding plug-in boards are replaced.
2. The method for searching for the remote control opening and closing operation fault of the circuit breaker according to claim 1, wherein the step of checking whether the remote control check error occurs in the background monitor further comprises the steps of:
if the remote control verification error is reported during the remote control operation, checking whether the name of the high-voltage switch cabinet where the breaker to be remotely controlled is located, the number and the password of the high-voltage switch cabinet are correct and whether the name corresponds to the definition in the system of the background monitor;
if the definition of the point number of the remote control object in the system is wrong, the definition of the point number is modified to be wrong, and if the definition of the point number of the remote control object in the system is not wrong, the name, the number and the password are input again correctly.
3. The method for remotely searching for the operation fault of the breaker switching-on and switching-off of the breaker according to claim 1, wherein the checking whether the operation fault is a remote timeout further comprises:
if the background monitor reports that the remote control is overtime, whether the transmission quality of the carrier communication signal is poor and whether the carrier communication channel is interfered are checked.
4. The method for remotely controlling opening and closing operation and troubleshooting of a circuit breaker according to claim 1 wherein said checking whether the remote execution is unsuccessful further comprises:
if the background monitor reports that the remote control execution is unsuccessful, whether a remote local transfer switch operating handle on a field high-voltage switch cabinet or a main transformer protection screen is in a remote position or not is checked.
5. The method for searching faults of remote control opening and closing operations of the circuit breaker according to claim 1, wherein if the opening switch and/or the closing switch are/is not successfully operated on site, whether the opening coil (TQ) and/or the closing coil (HQ) of the circuit breaker are/is normally powered on and closed is checked, and the method further comprises the following steps:
if the field operation of the closing switch is unsuccessful, whether a closing coil (HQ) is normally electrified and closed or not is checked at the closing and power transmission moment of the breaker;
if the field operation of the opening switch is unsuccessful, whether the opening coil (TQ) is normally electrified and sucked is checked at the opening power transmission moment of the breaker.
6. The method for searching for the remote control opening and closing operation fault of the circuit breaker according to claim 1, wherein the checking whether the voltage of the direct-current control power supply is normal further comprises: and checking whether the voltage of the direct current control power supply is 220V or not, and the voltage of the normal operation working power supply is not lower than 220V and 85% at minimum.
7. The method for searching for the fault in the remote switching-on and switching-off operation of the circuit breaker according to claim 1, wherein the checking whether the control circuit of the circuit breaker is broken further comprises:
checking whether the microcomputer protection measurement and control device reports fault information of the broken line of the control loop;
if the fault information of the control circuit disconnection is reported, for a closing electric circuit, whether a normally closed contact (QF1) of an auxiliary switch of the circuit breaker is closed, whether a handcart type circuit breaker is at a working position, whether a spring energy storage full contact (SP1) of a spring energy storage operating mechanism is closed, whether a resistance of a closing coil (HQ) is normal and whether the connection of a connecting circuit between all related elements is disconnected are sequentially checked; for the opening electrical loop, whether a normally open contact (QF2) of an auxiliary switch of the circuit breaker is closed, whether the resistance of an opening coil (TQ) is normal and whether the connection loop between all related elements is disconnected are sequentially checked;
if the microcomputer protection measurement and control device does not report the fault information of the control circuit disconnection, the fault is the fault of an electric coding lock (1S) or a remote local transfer switch (1QK) or an opening and closing control operation plug-in board of the microcomputer protection measurement and control device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109870647A (en) * | 2019-03-28 | 2019-06-11 | 山东钢铁股份有限公司 | A kind of monitoring system of breaker open operation electric loop failure |
| CN110108926B (en) * | 2019-04-17 | 2021-10-15 | 中国船舶重工集团公司第七O三研究所无锡分部 | Method for troubleshooting switching value instruction of gas turbine |
| CN111398800A (en) * | 2020-03-18 | 2020-07-10 | 山东钢铁股份有限公司 | Circuit breaker fault finding method |
| CN111679653A (en) * | 2020-06-15 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Intelligent fault recording device and direct-current field control loop fault positioning method |
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