CN110794299A - Fault online monitoring method and system of circuit breaker - Google Patents
Fault online monitoring method and system of circuit breaker Download PDFInfo
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- CN110794299A CN110794299A CN201911223069.XA CN201911223069A CN110794299A CN 110794299 A CN110794299 A CN 110794299A CN 201911223069 A CN201911223069 A CN 201911223069A CN 110794299 A CN110794299 A CN 110794299A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000016507 interphase Effects 0.000 claims description 16
- 238000012423 maintenance Methods 0.000 claims description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
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- 238000004806 packaging method and process Methods 0.000 claims description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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Abstract
The embodiment of the invention provides an online fault monitoring method of a circuit breaker, which comprises the following steps: the feeder line terminal acquires the state of a corresponding circuit where the breaker is located and sends the acquired monitoring information to the remote monitoring platform; the remote monitoring platform receives collected monitoring information sent by one or more feeder terminals through the wireless communication module in real time; the remote monitoring platform judges whether the current breaker is in an opening state or not according to the opening and closing state information of the breaker; if so, the remote monitoring platform judges the fault type according to the line state information and processes the fault according to the fault type. The state of the circuit breaker is monitored and information is acquired through the feeder terminal, so that the circuit breaker, line state information and the like are sent to the remote control platform, real-time monitoring is carried out on the remote control platform, the fault type and the fault point are judged under the switching-on condition of the circuit breaker, remote switching-on and fault processing are carried out on the corresponding circuit breaker, and therefore the fault processing efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a fault online monitoring method and system of a circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition, and capable of closing, carrying, and opening/closing a current under an abnormal circuit condition within a prescribed time. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, automatically cutting off a circuit when serious overload or faults such as short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an overvoltage and undervoltage relay and the like, and does not need to change parts after breaking fault current.
The existing high-voltage line has the characteristics of complex line, more faults, frequent tripping phenomenon of a breaker and the like. Especially, in the power system with the operating voltage class of 10KV which is widely used at present, the 10KV power system is generally applied to long-distance power transmission, and is generally applied to long-distance transmission to villages and households. In order to avoid burning down the transformer under the condition of large current due to the short-circuit fault of the transformer and the like, a breaker is arranged on the side of the transformer under the general condition, whether the overcurrent phenomenon occurs or not is detected through the breaker, and the opening operation is realized by the breaker once the overcurrent phenomenon occurs, so that the transformer is protected.
However, at present, a plurality of circuit breakers may be arranged in one 10KV line, and once a line fails, it is difficult to find and determine which transformer fails to cause the circuit breaker to be switched on, and the circuit breakers need to be checked one by one, which causes problems of long checking time, low maintenance efficiency, and the like. However, as the fault processing time is prolonged, the fault may be enlarged, and further, the fault may be developed into an inter-phase short circuit or damage to an electrical device, so that the power consumption requirement is seriously affected, and the safety and stability of the operation of the power supply system are affected.
Disclosure of Invention
The embodiment of the invention provides an online fault monitoring method for a circuit breaker, and aims to solve the problems that in the prior art, when a line has a fault, the closing of the circuit breaker caused by the fault cannot be confirmed, the closing and the fault of the circuit breaker need to be checked, the checking time is long, the maintenance efficiency is low, and the like.
The embodiment of the invention provides an online fault monitoring method of a circuit breaker, which is applied to a remote monitoring platform, wherein the remote monitoring platform is in communication connection with feeder terminals, the feeder terminals are in one-to-one corresponding connection with the circuit breaker, and the method comprises the following steps:
the feeder line terminal acquires the state of a corresponding line where the circuit breaker is located, and transmits acquired monitoring information to the remote monitoring platform, wherein the acquired monitoring information at least comprises line state information and circuit breaker switching-on and switching-off state information;
the remote monitoring platform receives collected monitoring information sent by one or more feeder terminals through the wireless communication module in real time;
the remote monitoring platform judges whether the current breaker is in an opening state or not according to the opening and closing state information of the breaker;
and if the current breaker is in an opening state, the remote monitoring platform judges the fault type according to the line state information and processes the fault according to the fault type.
Optionally, the feeder terminal collects a state of a corresponding line where the circuit breaker is located, and sends collected monitoring information to the remote monitoring platform, including:
the feeder line terminal respectively acquires a line current value, a line voltage value, a zero sequence current value and breaker switching-on and switching-off state information of a line where the breaker is located;
and calculating the total active power, the total reactive power, the total apparent power, the power factor and the frequency of the line according to the line current value and the line voltage value, and sending the calculated related information, the zero sequence current value and the breaker switching state information to a remote monitoring platform.
Optionally, the method further comprises:
the feeder line terminal judges whether the line current value is greater than an interphase short-circuit overcurrent threshold or whether the zero-sequence current value is greater than a single-phase grounding current threshold;
and if the line current value is greater than the interphase short circuit overcurrent threshold value or the zero sequence current value is greater than the single-phase grounding current threshold value, controlling an operating mechanism of the circuit breaker to automatically open the switch, and acquiring that the circuit breaker is in an open-switch state, otherwise, the circuit breaker is in a close-switch state.
Optionally, the remote monitoring platform determines whether the current circuit breaker is in an open state according to the circuit breaker open/close state information, including:
the remote monitoring platform receives a state identification code of the breaker switching state information;
and judging that the breaker is in an opening state or a closing state according to the state identification code.
Optionally, the line state information includes a line current value, a line voltage value, and a zero sequence current value, and the remote monitoring platform determines the fault type according to the line state information, including:
judging whether the line current value is greater than an interphase short-circuit overcurrent threshold value or not and whether the zero-sequence current value is greater than a single-phase grounding current threshold value or not;
if the zero sequence current value is larger than the single-phase grounding current threshold value, determining that the fault type is a permanent fault;
if the line current value is larger than the interphase short circuit overcurrent threshold value, timing is started;
judging whether all the line current values collected in a preset time period are greater than a short circuit overcurrent threshold value or not;
when all the line current values acquired within a preset time period are greater than a short-circuit overcurrent threshold value, determining that the fault type is a permanent fault;
and when the line current value acquired within the preset time period is smaller than the short-circuit overcurrent threshold value, determining the fault type as a loss fault.
Optionally, processing the fault according to the fault type includes:
when the fault type is determined to be a loss fault, a closing signal is sent to the feeder line terminal, and the feeder line terminal controls an operating mechanism of the circuit breaker to close;
and when the fault type is determined to be a permanent fault, sending maintenance information to a maintenance worker corresponding to the transformer where the circuit breaker is located so that the maintenance worker can carry out fault removal and fault repair, wherein the maintenance information at least comprises the geographical position coordinates of the circuit breaker.
In a second aspect, an embodiment of the present invention provides an online fault monitoring system for a circuit breaker, including: the system comprises a remote monitoring platform, a plurality of feeder terminals and a plurality of circuit breakers, wherein the circuit breakers are uniformly distributed in a transformer of a 10KV power transmission line, each circuit breaker is correspondingly provided with one feeder terminal, and each feeder terminal is wirelessly connected with the remote monitoring platform,
the circuit breaker is respectively provided with a voltage sensor for collecting line voltage, a voltage transformer for converting 10KV voltage into mains supply, a current transformer for collecting interphase current and a zero sequence current transformer for collecting zero sequence current;
and the feeder line terminal is respectively and electrically connected with the voltage sensor, the voltage transformer, the current transformer and the zero sequence current transformer.
Optionally, the feeder terminal comprises a box body and a box cover, the box cover covers the box body, a packaging plate is detachably mounted at the top of the box body close to the box cover, a circuit main board, a signal control board, a liquid crystal display panel, a wireless communication module, a battery management module and a storage battery are packaged in the box body, wherein,
the circuit main board is respectively and electrically connected with the signal control board, the liquid crystal display panel and the battery management module, the battery management module is respectively and electrically connected with the voltage transformer and the storage battery, and the battery management module is also electrically connected with the signal control board and the liquid crystal display panel;
the signal control board is electrically connected with the wireless communication module, and the wireless communication module is in communication connection with the remote monitoring platform;
the circuit main board is also electrically connected with the voltage sensor, the current transformer and the zero sequence current transformer respectively.
Optionally, install PT sampling circuit, CT sampling circuit and a plurality of connecting terminal on the circuit board, PT sampling circuit passes through the voltage sensor and the battery management module of AD converter and six-core aviation connection circuit breaker, CT sampling circuit prevents the current sensor and the zero sequence current transformer of open circuit aviation connection circuit breaker through six-core, circuit board passes through connecting terminal and is connected with liquid crystal display panel communication by serial ports circuit.
Optionally, a remote signaling acquisition circuit and a switching-on/off circuit are mounted on the signal control board; wherein,
the remote signaling acquisition circuit is in communication connection with the circuit main board and the wireless communication module respectively, and the opening and closing circuit is electrically connected with the circuit main board.
Compared with the prior art, the invention has the following beneficial effects:
the embodiment of the invention provides an online fault monitoring method of a circuit breaker, which is applied to a remote monitoring platform, wherein the remote monitoring platform is in communication connection with feeder terminals, the feeder terminals are in one-to-one corresponding connection with the circuit breaker, and the method comprises the following steps: the feeder line terminal acquires the state of a corresponding line where the circuit breaker is located, and transmits acquired monitoring information to the remote monitoring platform, wherein the acquired monitoring information at least comprises line state information and circuit breaker switching-on and switching-off state information; the remote monitoring platform receives collected monitoring information sent by one or more feeder terminals through the wireless communication module in real time; the remote monitoring platform judges whether the current breaker is in an opening state or not according to the opening and closing state information of the breaker; and if the current breaker is in an opening state, the remote monitoring platform judges the fault type according to the line state information and processes the fault according to the fault type. The state of the circuit breaker is monitored and information is acquired through the feeder terminal, so that the circuit breaker, line state information and the like are sent to the remote control platform, real-time monitoring is carried out on the remote control platform, the fault type and the fault point are judged under the switching-on condition of the circuit breaker, automatic remote switching-on and fault processing are carried out on the corresponding circuit breaker, and therefore the fault processing efficiency can be greatly improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow chart of an online fault monitoring method for a circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a feeder terminal for determining switching on and off of a circuit breaker according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of how the remote monitoring platform determines opening and closing of the circuit breaker according to the embodiment of the present invention;
FIG. 4 is a detailed flowchart of step S400 in FIG. 1 according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of online fault monitoring of a circuit breaker according to an embodiment of the present invention;
fig. 6 is a circuit block diagram of a feeder terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an online fault monitoring method for a circuit breaker according to an embodiment of the present invention is applied to a remote monitoring platform, where the remote monitoring platform is communicatively connected to feeder terminals, the feeder terminals are connected to the circuit breaker in a one-to-one correspondence manner, and in a specific implementation process, the remote monitoring platform may be composed of a cloud server, and includes a display platform and a computation processing module, which are not described in detail herein; the feeder terminal is used for acquiring relevant parameter information of the circuit breaker and sending the parameter information to the controller of the remote monitoring platform, and meanwhile, the opening and closing operation of the circuit breaker can be controlled.
As shown in fig. 1, the online fault monitoring method of the circuit breaker includes the following steps:
and S100, the feeder line terminal acquires the corresponding state of the circuit where the circuit breaker is located and sends the acquired monitoring information to a remote monitoring platform.
In a specific implementation process, the feeder terminal is used for acquiring state information of the circuit breaker and a line where the circuit breaker is located, the state information is acquired monitoring information, and the acquired monitoring information at least comprises line state information and circuit breaker on-off state information.
In addition, in the specific implementation process, the feeder terminal respectively acquires the line current value, the line voltage value, the zero sequence current value and the on-off state information of the circuit breaker. Therefore, the total active power, the total reactive power, the total apparent power, the power factor and the frequency of the line are calculated according to the line current value and the line voltage value, and the calculated related information, the zero sequence current value and the breaker opening and closing state information are sent to a remote monitoring platform. In the specific implementation process, how to calculate the calculation formulas of the active power, the reactive power and the like can refer to the prior art, and is not described in detail herein.
And step S200, the remote monitoring platform receives the collected monitoring information sent by one or more feeder terminals through the wireless communication module in real time.
In the specific implementation process, a feeder terminal is usually installed on one circuit breaker, and relevant parameter information on the circuit breaker is collected through the feeder terminal, so that the relevant information is sent to a remote monitoring platform, and the information is received by the remote monitoring platform, so that the current circuit breaker and the whole circuit are monitored.
And step S300, the remote monitoring platform judges whether the current breaker is in the opening state or not according to the opening and closing state information of the breaker.
In a specific implementation process, referring to the implementation shown in fig. 3, as shown in fig. 3, step S300 further includes:
step S301: and the remote monitoring platform receives the state identification code of the breaker switching state information.
In a specific implementation process, the switching state information sent by the feeder terminal to the remote monitoring platform includes a state identification code, and the state identification code may be represented by a one-bit binary code, and may represent the switching state of the circuit breaker by 0 and 1, for example, 0 represents the switching state of the circuit breaker, and 1 represents the switching state of the circuit breaker.
Step S302: and judging that the breaker is in an opening state or a closing state according to the state identification code.
According to the step S301, when the boil-off state identification code is received, the number of the identification code is obtained according to analysis, and therefore the opening state or the closing state of the circuit breaker is determined. If the current breaker is in the open state, step S400 is executed, and if the current breaker is in the close state, step S100 is continuously executed.
Step S400: and the remote monitoring platform judges the fault type according to the line state information and processes the fault according to the fault type.
In a specific implementation process, as shown in fig. 2, a schematic flow diagram of a feeder terminal acquiring relevant state information of a circuit breaker includes the following steps:
step S101: the feeder line terminal judges whether the line current value is greater than an interphase short-circuit overcurrent threshold or whether the zero-sequence current value is greater than a single-phase grounding current threshold;
step S102: and if the line current value is greater than the interphase short circuit overcurrent threshold value or the zero sequence current value is greater than the single-phase grounding current threshold value, controlling an operating mechanism of the circuit breaker to automatically open the switch, and acquiring that the circuit breaker is in an open-switch state, otherwise, the circuit breaker is in a close-switch state.
In addition, referring to fig. 4, which is a schematic flow chart of an online fault monitoring method for a circuit breaker according to an embodiment of the present invention, in a specific embodiment, the line state information includes a line current value, a line voltage value, and a zero sequence current value, and as shown in fig. 4, the step of determining the fault type by the remote monitoring platform according to the line state information includes:
step S401: judging whether the line current value is greater than an interphase short-circuit overcurrent threshold value or not and whether the zero-sequence current value is greater than a single-phase grounding current threshold value or not;
step S402: if the zero sequence current value is larger than the single-phase grounding current threshold value, determining that the fault type is a permanent fault;
step S403: if the line current value is larger than the interphase short circuit overcurrent threshold value, timing is started;
step S404: judging whether all the line current values collected in a preset time period are greater than a short circuit overcurrent threshold value or not;
step S405: when all the line current values acquired within a preset time period are greater than a short-circuit overcurrent threshold value, determining that the fault type is a permanent fault;
step S406: and when the line current value acquired within the preset time period is smaller than the short-circuit overcurrent threshold value, determining the fault type as a loss fault.
In the specific implementation process, when the fault type is determined to be a loss fault, a closing signal is sent to the feeder line terminal, and the feeder line terminal controls an operating mechanism of the circuit breaker to close; and when the fault type is determined to be a permanent fault, sending maintenance information to a maintenance worker corresponding to the transformer where the circuit breaker is located so that the maintenance worker can carry out fault removal and fault repair, wherein the maintenance information at least comprises the geographical position coordinates of the circuit breaker.
By adopting the online fault monitoring method for the circuit breaker provided by the embodiment of the invention, the state of the circuit breaker is monitored and information is acquired through the feeder terminal, so that the circuit breaker, the line state information and the like are sent to the remote control platform, the remote control platform carries out real-time monitoring, and the fault type and the fault point are judged under the switching-on condition of the circuit breaker, so that the corresponding circuit breaker is automatically and remotely switched on and subjected to fault processing, and the fault processing efficiency can be greatly improved.
In addition, referring to the schematic structural diagram of the online fault monitoring system of the circuit breaker shown in fig. 5, as shown in fig. 5, the online fault monitoring system of the circuit breaker includes: the system comprises a remote monitoring platform 30, a plurality of feeder terminals 20 and a plurality of circuit breakers 10, wherein the circuit breakers 10 are all distributed in a transformer of a 10KV power transmission line, each circuit breaker 10 is correspondingly provided with one feeder terminal 20, and each feeder terminal 20 is in wireless connection with the remote monitoring platform 30.
In a specific implementation process, the circuit breaker 10 is respectively provided with a voltage sensor for acquiring line voltage, a voltage transformer for converting 10KV voltage into commercial power (such as 220V, 110V or 24V), a current transformer for acquiring interphase current, and a zero-sequence current transformer for acquiring zero-sequence current; and the feeder line terminal is respectively and electrically connected with the voltage sensor, the voltage transformer, the current transformer and the zero sequence current transformer.
In a specific implementation process, as shown in fig. 6, the feeder terminal 20 includes a box body and a box cover, the box cover covers the box body, a package board is detachably mounted on the top of the box body close to the box cover, a circuit board, a signal control board, a liquid crystal display panel, a wireless communication module, a battery management module and a storage battery are packaged in the box body, wherein the circuit board is electrically connected with the signal control board, the liquid crystal display panel and the battery management module respectively, the battery management module is electrically connected with the voltage transformer and the storage battery respectively, and the battery management module is further electrically connected with the signal control board and the liquid crystal display panel; the signal control board is electrically connected with the wireless communication module, and the wireless communication module is in communication connection with the remote monitoring platform; the circuit main board is also electrically connected with the voltage sensor, the current transformer and the zero sequence current transformer respectively.
Wherein, install PT sampling circuit, CT sampling circuit and a plurality of connecting terminal on the circuit board, PT sampling circuit passes through AD converter and six-core aviation plug connection circuit breaker's voltage sensor and battery management module, CT sampling circuit prevents open circuit aviation plug connection circuit breaker's current sensor and zero sequence current transformer through six cores, circuit board passes through connecting terminal and is connected by serial ports circuit and liquid crystal display panel communication. The signal control board is provided with a remote signal acquisition circuit and a switching-on/off circuit; the remote signaling acquisition circuit is in communication connection with the circuit main board and the wireless communication module respectively, and the switching-on/off circuit is electrically connected with the circuit main board.
In the specific implementation process, the battery management module has the functions of intelligent charging and discharging management and battery activation management on the storage battery, and can effectively prevent overcharge, overdischarge and passivation of the storage battery; the liquid crystal display can check implementation operation data, check fixed value parameter information and modify fixed values and parameters in place in cooperation with key operation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An online fault monitoring method of a circuit breaker is applied to a remote monitoring platform, the remote monitoring platform is in communication connection with a feeder terminal, the feeder terminal is in one-to-one correspondence connection with the circuit breaker, and the method is characterized by comprising the following steps:
the feeder line terminal acquires the state of a corresponding line where the circuit breaker is located, and transmits acquired monitoring information to the remote monitoring platform, wherein the acquired monitoring information at least comprises line state information and circuit breaker switching-on and switching-off state information;
the remote monitoring platform receives collected monitoring information sent by one or more feeder terminals through the wireless communication module in real time;
the remote monitoring platform judges whether the current breaker is in an opening state or not according to the opening and closing state information of the breaker;
and if the current breaker is in an opening state, the remote monitoring platform judges the fault type according to the line state information and processes the fault according to the fault type.
2. The method for monitoring the online fault of the circuit breaker according to claim 1, wherein the feeder terminal collects the state of the corresponding circuit on which the circuit breaker is located and sends the collected monitoring information to a remote monitoring platform, and the method comprises the following steps:
the feeder line terminal respectively acquires a line current value, a line voltage value, a zero sequence current value and breaker switching-on and switching-off state information of a line where the breaker is located;
and calculating the total active power, the total reactive power, the total apparent power, the power factor and the frequency of the line according to the line current value and the line voltage value, and sending the calculated related information, the zero sequence current value and the breaker switching state information to a remote monitoring platform.
3. The method for online fault monitoring of a circuit breaker according to claim 2, wherein the method further comprises:
the feeder line terminal judges whether the line current value is greater than an interphase short-circuit overcurrent threshold or whether the zero-sequence current value is greater than a single-phase grounding current threshold;
and if the line current value is greater than the interphase short circuit overcurrent threshold value or the zero sequence current value is greater than the single-phase grounding current threshold value, controlling an operating mechanism of the circuit breaker to automatically open the switch, and acquiring that the circuit breaker is in an open-switch state, otherwise, the circuit breaker is in a close-switch state.
4. The method for monitoring the online fault of the circuit breaker according to claim 1, wherein the step of judging whether the current circuit breaker is in the open state or not by the remote monitoring platform according to the open/close state information of the circuit breaker comprises the steps of:
the remote monitoring platform receives a state identification code of the breaker switching state information;
and judging that the breaker is in an opening state or a closing state according to the state identification code.
5. The method for monitoring the online fault of the circuit breaker according to claim 1, wherein the line state information includes a line current value, a line voltage value, and a zero sequence current value, and the determining the fault type by the remote monitoring platform according to the line state information includes:
judging whether the line current value is greater than an interphase short-circuit overcurrent threshold value or not and whether the zero-sequence current value is greater than a single-phase grounding current threshold value or not;
if the zero sequence current value is larger than the single-phase grounding current threshold value, determining that the fault type is a permanent fault;
if the line current value is larger than the interphase short circuit overcurrent threshold value, timing is started;
judging whether all the line current values collected in a preset time period are greater than a short circuit overcurrent threshold value or not;
when all the line current values acquired within a preset time period are greater than a short-circuit overcurrent threshold value, determining that the fault type is a permanent fault;
and when the line current value acquired within the preset time period is smaller than the short-circuit overcurrent threshold value, determining the fault type as a loss fault.
6. The method for on-line fault monitoring of a circuit breaker according to claim 5, wherein processing a fault according to the fault type comprises:
when the fault type is determined to be a loss fault, a closing signal is sent to the feeder line terminal, and the feeder line terminal controls an operating mechanism of the circuit breaker to close;
and when the fault type is determined to be a permanent fault, sending maintenance information to a maintenance worker corresponding to the transformer where the circuit breaker is located so that the maintenance worker can carry out fault removal and fault repair, wherein the maintenance information at least comprises the geographical position coordinates of the circuit breaker.
7. An online fault monitoring system for a circuit breaker, comprising: the system comprises a remote monitoring platform, a plurality of feeder terminals and a plurality of circuit breakers, wherein the circuit breakers are uniformly distributed in a transformer of a 10KV power transmission line, each circuit breaker is correspondingly provided with one feeder terminal, and each feeder terminal is wirelessly connected with the remote monitoring platform,
the circuit breaker is respectively provided with a voltage sensor for collecting line voltage, a voltage transformer for converting 10KV voltage into mains supply, a current transformer for collecting interphase current and a zero sequence current transformer for collecting zero sequence current;
and the feeder line terminal is respectively and electrically connected with the voltage sensor, the voltage transformer, the current transformer and the zero sequence current transformer.
8. The on-line fault monitoring system of circuit breaker according to claim 7, wherein said feeder terminal comprises a box body and a box cover, said box cover is covered on said box body, a packaging plate is detachably mounted on the top of said box body near the box cover, a circuit main board, a signal control board, a liquid crystal display panel, a wireless communication module, a battery management module and a storage battery are packaged in said box body, wherein,
the circuit main board is respectively and electrically connected with the signal control board, the liquid crystal display panel and the battery management module, the battery management module is respectively and electrically connected with the voltage transformer and the storage battery, and the battery management module is also electrically connected with the signal control board and the liquid crystal display panel;
the signal control board is electrically connected with the wireless communication module, and the wireless communication module is in communication connection with the remote monitoring platform;
the circuit main board is also electrically connected with the voltage sensor, the current transformer and the zero sequence current transformer respectively.
9. The on-line fault monitoring system of circuit breaker according to claim 8, characterized in that, install PT sampling circuit, CT sampling circuit and a plurality of connecting terminal on the circuit mainboard, PT sampling circuit passes through the voltage sensor and the battery management module of A/D converter and six-core aviation connection circuit breaker, CT sampling circuit passes through six-core anti-open circuit aviation connection circuit breaker's current sensor and zero sequence current transformer, the circuit mainboard is through connecting terminal by serial ports circuit and liquid crystal display panel communication connection.
10. The on-line fault monitoring system of the circuit breaker according to claim 9, wherein the signal control board is provided with a remote signaling acquisition circuit and a switching-on/off circuit; wherein,
the remote signaling acquisition circuit is in communication connection with the circuit main board and the wireless communication module respectively, and the opening and closing circuit is electrically connected with the circuit main board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911223069.XA CN110794299A (en) | 2019-12-03 | 2019-12-03 | Fault online monitoring method and system of circuit breaker |
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| CN201911223069.XA CN110794299A (en) | 2019-12-03 | 2019-12-03 | Fault online monitoring method and system of circuit breaker |
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| CN201911223069.XA Pending CN110794299A (en) | 2019-12-03 | 2019-12-03 | Fault online monitoring method and system of circuit breaker |
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| CN112834918A (en) * | 2020-12-21 | 2021-05-25 | 深圳供电局有限公司 | Switch failure detection method and switch failure detection device |
| CN113067408A (en) * | 2021-03-22 | 2021-07-02 | 广东电网有限责任公司 | Remote control system |
| CN113097993A (en) * | 2021-03-15 | 2021-07-09 | 机械工业第九设计研究院有限公司 | Intelligent power supply jack box of high-power dynamometer and balanced power supply method |
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| CN113640659A (en) * | 2021-07-14 | 2021-11-12 | 北京智芯微电子科技有限公司 | Method, device, processor and power distribution equipment for determining switch fault type |
| CN113985184A (en) * | 2021-11-02 | 2022-01-28 | 国网北京市电力公司 | Test method, device and system for direct current distribution network protection device and storage medium |
| CN114362375A (en) * | 2022-03-16 | 2022-04-15 | 宜科(天津)电子有限公司 | Remote communication data processing system |
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| CN113985184A (en) * | 2021-11-02 | 2022-01-28 | 国网北京市电力公司 | Test method, device and system for direct current distribution network protection device and storage medium |
| CN114362375A (en) * | 2022-03-16 | 2022-04-15 | 宜科(天津)电子有限公司 | Remote communication data processing system |
| CN116455044A (en) * | 2023-03-08 | 2023-07-18 | 科舸物联科技有限公司 | Intelligent miniature circuit breaker power-off information loss prevention system and method |
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