CN209946345U - Intelligent pole-mounted circuit breaker with primary and secondary integration and cable monitoring system - Google Patents
Intelligent pole-mounted circuit breaker with primary and secondary integration and cable monitoring system Download PDFInfo
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- CN209946345U CN209946345U CN201920395738.0U CN201920395738U CN209946345U CN 209946345 U CN209946345 U CN 209946345U CN 201920395738 U CN201920395738 U CN 201920395738U CN 209946345 U CN209946345 U CN 209946345U
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Abstract
The utility model discloses a circuit breaker and cable monitoring system on intelligent post are fused to a secondary, the circuit breaker includes: the circuit breaker comprises a current transformer, a bracket, a circuit breaker body, a handle, a wiring device, an insulating device and an isolating device; one end of the bracket is connected with the breaker body, and the other end of the bracket is connected with the insulating device; the handle is connected with the circuit breaker body and the isolating device; the current transformer is connected with the circuit breaker body; the wiring device is connected with the insulating device; the circuit breaker further comprises an intelligent controller, the intelligent controller is arranged in the circuit breaker body and used for isolating a fault line according to fault information, and real-time monitoring and positioning of faults are achieved through linkage of the intelligent controller and other modules.
Description
Technical Field
The utility model relates to a cable monitoring technology field, concretely relates to circuit breaker and cable monitoring system on secondary fusion intelligence post.
Background
Along with the rapid development of urban power distribution networks, the cabling rate of the existing urban power distribution networks is higher and higher, single-phase earth faults occur to power distribution network cables with neutral points grounded through arc suppression coils, the single-phase earth faults are influenced by the system operation mode and the characteristics of the cables, the early warning and fault positioning difficulty of the single-phase earth faults of the cables is higher, once the single-phase earth faults occur, the single-phase earth faults are rapidly propagated to short-circuit faults to cause line tripping, if fault sections cannot be isolated timely, the faults are rapidly expanded to cause line power failure, and the power supply reliability is seriously influenced. How to obtain the real-time running state of the cable, judge the remaining service life of the cable, and make a differentiated maintenance scheme, thereby reducing the operation cost and improving the power supply reliability becomes a challenge to be faced and a problem to be solved urgently.
Disclosure of Invention
For solving the problem that proposes among the above-mentioned background art, the utility model provides a circuit breaker and cable monitoring system on intelligence post are fused to a secondary realizes the real-time supervision and the location of trouble through the linkage that adopts intelligent control ware and other modules.
The utility model discloses the first aspect provides a circuit breaker on intelligent post is fused to a secondary, the circuit breaker includes: the circuit breaker comprises a current transformer, a bracket, a circuit breaker body, a handle, a wiring device, an insulating device and an isolating device; one end of the bracket is connected with the breaker body, and the other end of the bracket is connected with the insulating device; the handle is connected with the circuit breaker body and the isolating device; the current transformer is connected with the circuit breaker body; the wiring device is connected with the insulating device; the circuit breaker further comprises an intelligent controller, wherein the intelligent controller is arranged in the circuit breaker body and used for isolating a fault line according to fault information.
As an alternative, the circuit breaker further comprises: and the zero sequence current transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller.
As an alternative, the circuit breaker further comprises: and the zero sequence voltage transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller.
As an alternative, the intelligent controller comprises a communication control module, and the communication control module is connected with the background server through the internet or the GPRS.
As an alternative, the handle includes a disconnector operating handle, a circuit breaker manual separation handle and a circuit breaker charging handle.
As an alternative, the wiring device includes an incoming end wiring device and an outgoing end wiring device.
As an alternative, the insulation means comprises an insulator and an insulating tie rod.
The utility model provides a cable monitoring system in a second aspect, which comprises the primary and secondary fusion intelligent on-post circuit breaker and a cable fault early warning and positioning device; the cable fault early warning positioning device is used for monitoring or positioning a fault position.
As an alternative, the cable fault early warning and positioning device comprises a sensor and a control module; the sensor is used for judging fault information according to the discharge state or the single-phase grounding state of the cable.
As an alternative, the control module comprises a communication module; the communication module is connected with the background server through the Internet or GPRS.
The utility model has the advantages that: thereby realize the real-time supervision and the location of trouble through the linkage that adopts intelligent control ware and other modules on the circuit breaker, realize "centralized type feeder automation and type feeder automation on the spot" function, possess segmentation/liaison and boundary circuit breaker complete set function, can gather three-phase current, zero sequence current, line voltage, zero sequence voltage, active power, reactive power and electric energy collection. The power supply function of the non-fault section can be automatically recovered. After the circuit breaker is configured with the control and communication module, the automatic requirement of the distribution network can be met.
Drawings
FIG. 1 is a schematic diagram of a secondary fused intelligent pole top breaker configuration;
FIG. 2 is another schematic diagram of a secondary fused intelligent pole-mounted circuit breaker;
1. disconnecting switch operating handle 2, disconnecting switch main shaft 3 and manual on-off handle of circuit breaker
4. Energy storage handle 5 of circuit breaker, deciliter indicate 6, leading-out terminal wiring board 7, insulator
8. Insulating pull rod 9, support 10, isolation blade 11, inlet wire terminal wiring board
12. Circuit breaker body 13, current transformer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings in conjunction with specific embodiments.
Example one
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a circuit breaker on intelligent post is fused to a secondary, the circuit breaker includes: the circuit breaker comprises a current transformer 13, a bracket 9, a circuit breaker body 12, a handle, a wiring device, an insulating device and an isolating device; one end of the bracket 9 is connected with the circuit breaker body 12, and the other end of the bracket is connected with the insulating device; the handle is connected with the breaker body 12 and the isolation device; the current transformer 13 is connected with the circuit breaker body 12; the wiring device is connected with the insulating device; the circuit breaker further comprises an intelligent controller, wherein the intelligent controller is arranged in the circuit breaker body and used for isolating a fault line according to fault information.
The current transformer 13 is used for overcurrent protection and phase-to-phase protection.
Optionally, the circuit breaker further includes: and the zero sequence current transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller. The three-phase integrated zero-sequence current transformer transformation ratio 20/1 is installed on the primary and secondary fusion intelligent pole-mounted circuit breaker, so that single-phase grounding faults in a circuit can be detected, the single-phase grounding faults are provided for an intelligent controller, and fault isolation is automatically performed.
When zero sequence grounding current is generated in the circuit, the zero sequence current transformer is matched with a relay protection device or a signal for use, so that the device element acts, and protection or monitoring is realized. When an electric shock or leakage fault occurs in the circuit, the secondary side of the mutual inductor outputs zero-sequence current, so that equipment on the connected secondary line is protected (power supply is cut off, alarm and the like).
The zero sequence current protection can be specifically applied by installing a current transformer (C.T) on each three-phase line or installing three-phase wires together to pass through a zero sequence C.T, or installing a zero sequence C.T on a neutral line N, and using C.T to detect the sum of current vectors of the three phases, namely zero sequence current Io, IA + IB + IC ═ Io, and when three-phase loads connected to the lines are completely balanced (no ground fault is generated and leakage current of the lines and electrical equipment is not considered), Io ═ 0; when three-phase loads connected to the line are unbalanced, IO is equal to IN, and the zero-sequence current at the moment is unbalanced current IN; when a certain phase has an earth fault, a single-phase earth fault current Id is inevitably generated, and the detected zero-sequence current IO is equal to IN + Id, which is the vector sum of the three-phase unbalanced current and the single-phase earth current.
Optionally, the circuit breaker further includes: and the zero sequence voltage transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller. The external electronic zero-sequence voltage transformer (10/√ 3/6.5V/3) of the circuit breaker can detect a single-phase earth fault in a line, provide the single-phase earth fault to an intelligent controller and automatically perform fault isolation
Optionally, the intelligent controller includes a communication control module, and the communication control module is connected with the background server through the internet or the GPRS.
Optionally, the handle includes a disconnecting switch operating handle 1, a breaker manual separation handle 3 and a breaker energy storage handle 4.
Optionally, the wiring device includes a wire inlet end wiring device 11 and a wire outlet end wiring device 6.
As an alternative, the insulation means comprise an insulator 7 and an insulating tie 8.
The primary and secondary integration intelligent pole-mounted circuit breaker is widely applicable to urban networks or rural networks as a section switch or a tie switch, is used for outdoor substations of rural power grid distribution systems as an outgoing switch, is used for protecting 10kV systems as branch and combined load current, overload current and short-circuit current, is used for automatic detection, isolation and alarm of ring network line section and branch outgoing line faults, monitors the operation of circuits, can realize functions of centralized feeder automation and local feeder automation, has the complete set of functions of section/tie and boundary circuit breakers, and can collect three-phase current, zero-sequence current, line voltage, zero-sequence voltage, active power, reactive power and electric energy collection. The power supply function of the non-fault section can be automatically recovered. After the circuit breaker is provided with the measurement, protection, control and communication modules, the requirement of distribution network automation can be met.
Example two
The embodiment provides a cable monitoring system, which comprises the primary and secondary integrated intelligent pole-mounted circuit breaker and a cable fault early warning and positioning device; the cable fault early warning positioning device is used for monitoring or positioning a fault position.
Optionally, the cable fault early warning and positioning device includes a sensor and a control module; the sensor is used for judging fault information according to the discharge state or the single-phase grounding state of the cable.
The cable is connected with the equipment through the cable middle head and the terminal head, no matter whether a cable accessory or the cable has defects, a partial discharge phenomenon can be generated generally, the intelligent cable fault early warning and positioning system senses a partial discharge signal through the sensor, and faults are accurately positioned through the synchronization system and the pulse signal.
The intelligent cable fault early warning and positioning system monitors the cable once per minute, detected original data are stored in a first-in first-out (FIFO) controller, and the detected data are uploaded to a control center for analysis and interpretation every hour. The electric network operator can check the analyzed detection data through the server. Once the control center finds serious partial discharge, alarm information is sent to the electric network operator and the customer, and a risk assessment value and a proper solution are provided.
Time synchronization and internal system verification: in order to accurately position the partial discharge point of the line, the synchronization of the detection device must be ensured, the intelligent line fault early warning and positioning system injects a pulse signal into one end of the tested cable and receives the pulse signal at the other end, the process is carried out once per minute, and the system calibration and the internal inspection are simultaneously realized. If the time synchronization check fails, the system hardware sends alarm information to the control center.
Single-phase earth fault location: similar to local discharge, when a power distribution network breaks down, high-frequency traveling waves are often accompanied, before power frequency short-circuit current reaches, the power distribution network passes through the sensors at the two ends of the cable at the speed of light, the time of the high-frequency traveling waves reaching the two ends of the cable is accurately recorded, and the accurate position of the fault can be accurately and reliably detected and found.
Optionally, the control module includes a communication module; the communication module is connected with the background server through the Internet or GPRS.
The cable fault early warning positioning device can accurately position the fault position, the positioning accuracy is up to 99 percent, and the maintenance efficiency can be effectively improved; the intelligent management level of the power grid can be effectively improved, and the reliable image of enterprise innovative power grid management is enhanced; meanwhile, the method can be used as an effective information source of an enterprise asset management system, so that the level of enterprise asset management is improved, and the cable maintenance and replacement cost is reduced.
The above technical solution and the accompanying drawings provided in the embodiments of the present invention are used for further explanation but not limitation of the present invention, and it should be noted that, as one skilled in the art should know, the technical solution described in the foregoing embodiments can still be modified, or some or all of the technical features therein can be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution depart from the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a circuit breaker on intelligent post is fused to a secondary, its characterized in that, the circuit breaker includes:
the circuit breaker comprises a current transformer, a bracket, a circuit breaker body, a handle, a wiring device, an insulating device and an isolating device;
one end of the bracket is connected with the breaker body, and the other end of the bracket is connected with the insulating device;
the handle is connected with the circuit breaker body and the isolating device;
the current transformer is connected with the circuit breaker body;
the wiring device is connected with the insulating device;
the circuit breaker further comprises an intelligent controller, wherein the intelligent controller is arranged in the circuit breaker body and used for isolating a fault line according to fault information.
2. The primary and secondary fused intelligent pole-mounted circuit breaker according to claim 1, further comprising:
and the zero sequence current transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller.
3. The primary and secondary fused intelligent pole-mounted circuit breaker according to claim 2, further comprising:
and the zero sequence voltage transformer is used for detecting the single-phase earth fault in the line and transmitting a fault signal to the intelligent controller.
4. The primary and secondary fused intelligent pole-mounted circuit breaker according to any one of claims 1 to 3, wherein the intelligent controller comprises a communication control module, and the communication control module is connected with a background server through the Internet or GPRS.
5. The primary and secondary fused intelligent pole-mounted circuit breaker according to any one of claims 1 to 3, wherein the handle comprises a disconnecting switch operating handle, a circuit breaker manual separation handle and a circuit breaker energy storage handle.
6. A secondary fused intelligent pole-mounted circuit breaker according to any one of claims 1 to 3, wherein said wiring means comprises incoming terminal wiring means and outgoing terminal wiring means.
7. The secondary fused intelligent pole-mounted circuit breaker according to any one of claims 1 to 3, wherein the insulation device comprises an insulator and an insulation pull rod.
8. A cable monitoring system, comprising the primary and secondary fused intelligent pole-mounted circuit breaker of any one of claims 1 to 7 and a cable fault early warning positioning device;
the cable fault early warning positioning device is used for monitoring or positioning a fault position.
9. The cable monitoring system of claim 8, wherein the cable fault warning and locating device comprises a sensor and a control module;
the sensor is used for judging fault information according to the discharge state or the single-phase grounding state of the cable.
10. A cable monitoring system according to claim 9, wherein the control module comprises a communications module;
the communication module is connected with the background server through the Internet or GPRS.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920395738.0U CN209946345U (en) | 2019-03-27 | 2019-03-27 | Intelligent pole-mounted circuit breaker with primary and secondary integration and cable monitoring system |
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| CN201920395738.0U CN209946345U (en) | 2019-03-27 | 2019-03-27 | Intelligent pole-mounted circuit breaker with primary and secondary integration and cable monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884454A (en) * | 2019-03-27 | 2019-06-14 | 国网电力科学研究院武汉南瑞有限责任公司 | The intelligent pole-mounted circuit breaker of one or two fusions of one kind and cable monitoring system |
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- 2019-03-27 CN CN201920395738.0U patent/CN209946345U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884454A (en) * | 2019-03-27 | 2019-06-14 | 国网电力科学研究院武汉南瑞有限责任公司 | The intelligent pole-mounted circuit breaker of one or two fusions of one kind and cable monitoring system |
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