CN213337783U - Residual current monitoring system of alternating current system for transformer substation - Google Patents
Residual current monitoring system of alternating current system for transformer substation Download PDFInfo
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- CN213337783U CN213337783U CN202021463818.4U CN202021463818U CN213337783U CN 213337783 U CN213337783 U CN 213337783U CN 202021463818 U CN202021463818 U CN 202021463818U CN 213337783 U CN213337783 U CN 213337783U
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Abstract
The utility model provides a residual current monitoring system of an alternating current system for a transformer substation, which comprises a monitoring system host, a power communication module, a system alternating voltage acquisition module, a plurality of residual current collectors and a plurality of alternating current sensors; the monitoring system host is electrically connected with the power supply communication module and the system alternating voltage acquisition module; the power supply communication module is electrically connected with the system alternating voltage acquisition module and the residual current acquisition device; each residual current collector is electrically connected with a plurality of alternating current sensors. The utility model provides a transformer substation is alternating current system residual current monitoring system for station monitors through the real-time residual current to each alternating current circuit in the station to judge whether there is insulation fault in the system.
Description
Technical Field
The utility model relates to a monitoring facilities technical field of transformer substation especially relates to a transformer substation is residual current monitoring system of alternating current system for station.
Background
At present, an alternating current system for a transformer substation is used for supplying power to primary and secondary equipment of the transformer substation, is an indispensable link for ensuring reliable power supply of the transformer substation, and can directly influence the normal use of running equipment when abnormal conditions occur. And the insulation fault of the station alternating current system can bring great potential safety hazard to the alternating current power supply in the station, so that the monitoring of the residual current of the station alternating current system is very important.
The traditional operation mode of the station alternating current system is that the inspection is carried out until a short-circuit fault occurs, which is very unfavorable for the stability of the alternating current power supply in the station, and if the insulation fault of the station alternating current system is not developed into the short-circuit fault, the operation reliability is greatly improved.
Therefore, it is desirable to provide an ac system residual current monitoring system for a substation to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a transformer substation is alternating current system residual current monitoring system for station, monitors through the real-time residual current to each alternating current return circuit in the station to judge whether there is insulation fault in the system.
In order to solve the technical problems, the utility model adopts a technical proposal that a residual current monitoring system of an alternating current system for a transformer substation is provided,
the system comprises a monitoring system host 1, a power supply communication module 2, a system alternating current voltage acquisition module 3, a plurality of residual current collectors 4 and a plurality of alternating current sensors 5;
the monitoring system host 1 is electrically connected with the power supply communication module 2 and the system alternating voltage acquisition module 3;
the power supply communication module 2 is electrically connected with the system alternating voltage acquisition module 3 and the residual current collector 4;
each residual current collector 4 is electrically connected with a plurality of alternating current sensors 5.
In the examples, it is preferred that:
the monitoring system host 1 is provided with a power switch key 11, a positive and negative 12V alternating current power supply and upper computer communication interface 12, an Ethernet interface 13, an RS485 interface 14 for electrically connecting a power supply communication module 2 and a system alternating current voltage acquisition module 3, and an alarm signal output interface 15.
In the examples, it is preferred that:
the power supply communication module 2 is provided with a second power switch 21, an alternating current mains supply input interface 22, a communication interface 23 electrically connected with the RS485 interface 14, a positive and negative 12V voltage working state indicator lamp 24, a positive and negative 12V power supply voltage output interface 25, and 8 sub-communication interfaces 26 for electrically connecting the residual current collector 4.
In the examples, it is preferred that:
the system alternating voltage acquisition module 3 is provided with a power supply wiring port connected with the positive and negative 12V power supply voltage output interface 25 of the power supply communication module 2 and a communication interface connected with the RS485 interface 14 of the monitoring system host 1.
In the examples, it is preferred that:
the residual current collector 4 is provided with a first network communication socket 41, an 8-bit range dial switch 43 for setting the range of the residual current collector, and eight current collection wiring ports 44 for one-to-one corresponding electric connection of the alternating current sensors 5, wherein the first network communication socket 41 is electrically connected with the electronic communication interfaces 26 one-to-one corresponding through 8-core network through wires 6.
In the examples, it is preferred that:
the residual current collector 4 is provided with a network communication socket I41, a network communication socket II 42, an 8-bit range dial switch 43 for setting the range of the residual current collector, and eight current collecting wiring ports 44 for electrically connecting the alternating current sensors 5 in a one-to-one correspondence manner;
the first network communication socket 41 of the residual current collector 4 is directly electrically connected with the electronic communication interface 26 through the 8-core network through-line 6, or is directly electrically connected with the second network communication socket 42 of another residual current collector 4 through the 8-core network through-line 6, and then the first network communication socket 41 of the other residual current collector 4 is electrically connected with the electronic communication interface 26 through the 8-core network through-line 6.
In the examples, it is preferred that:
the alternating current sensors 5 are connected with the current acquisition wiring ports 44 in a one-to-one correspondence mode through the 4P telephone lines 7.
In the examples, it is preferred that:
the alternating current sensor 5 is provided with a 4P wiring terminal;
4P telephone line 7 one end sets up 8P crystal head, and the other end one-to-one corresponds fixed connection 4P binding post, 8P crystal head one-to-one grafting current acquisition wiring port 44.
The utility model has the advantages that: the device can monitor the residual current of each alternating current feeder line in the transformer substation in real time, can help operation and maintenance personnel to quickly locate a fault loop, greatly shortens the search time of alternating current insulation faults, and ensures the reliability of an alternating current power supply system in the substation.
The device is not only suitable for residual current monitoring of single-phase alternating current circuit, also is suitable for residual current monitoring of three-phase alternating current circuit, to the not circuit together of three-phase alternating current circuit phase line and zero line, and the residual current monitoring of various complicated three-phase alternating current circuit can be realized to the configuration of system circuit.
Drawings
Fig. 1 is a schematic circuit structure diagram of a first preferred embodiment of the ac system residual current monitoring system for the substation of the present invention;
fig. 2 is a schematic diagram of the circuit arrangement of fig. 1 in further detail.
The numerical designations in the drawings identify the corresponding component names, respectively, as follows:
1-monitoring system host; 11-power switch key; 12-positive and negative 12V alternating current power supply and upper computer communication interface; 13-an ethernet interface; 14-RS485 interface; 15-alarm signal output interface;
2-a power supply communication module; 21-a second power switch; 22-alternating current mains supply input interface; 23-a communication interface; 24-a positive and negative 12V voltage working state indicator lamp; 25-a positive and negative 12V power supply voltage output interface; 26-a sub-communication interface;
3, a system alternating voltage acquisition module;
4-residual current collector; 41-network communication socket one; 42-network communication socket two; 43-range dial switch; 44-current collection wiring port;
5-alternating current sensor;
6-8 core network pass-through lines;
7-4P telephone lines.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the drawings.
Referring to fig. 1, the system for monitoring residual current of an ac system for a substation of the present embodiment includes a monitoring system host 1, a power supply communication module 2, a system ac voltage acquisition module 3, a plurality of residual current collectors 4, and a plurality of ac current sensors 5;
the monitoring system host 1 is electrically connected with the power supply communication module 2 and the system alternating voltage acquisition module 3;
the power supply communication module 2 is electrically connected with the system alternating voltage acquisition module 3 and the residual current collector 4;
each residual current collector 4 is electrically connected with a plurality of alternating current sensors 5.
The residual current monitoring system of the alternating current system for the substation can distribute the data collection tasks between the monitoring system host 1 and the power supply communication module 2 in a balanced manner, so that the workload of the monitoring system host 1 can be reduced, the system processing potential can be fully utilized, and the optimal processing effect and the shortest processing time can be obtained.
In this embodiment, the monitoring system host 1 may finally transmit the processed data to the upper computer. Therefore, the workload of the upper computer is reduced, and the upper computer can simultaneously receive the data of the monitoring system hosts 1.
Referring to fig. 2, in an embodiment of the present invention, the monitoring system host 1 is provided with a power switch button 11, a positive and negative 12V ac power supply and upper computer communication interface 12, an ethernet interface 13, an RS485 interface 14 for electrically connecting the power supply communication module 2 and the system ac voltage acquisition module 3, and an alarm signal output interface 15;
in this embodiment, the ethernet interface 13 may be used to transmit data to the control center server through a network cable, so that the data is convenient for remote viewing and sharing;
when the monitoring system host 1 monitors that the voltage of the alternating current system to be detected is higher or lower and exceeds a preset standard value range, an alarm is sent out to remind monitoring personnel to carry out corresponding processing;
the RS485 interface 14 can transmit data to an upper computer through a data line with adaptability for corresponding processing.
Referring further to fig. 2, in an embodiment of the present invention:
the power supply communication module 2 is provided with a second power switch 21, an alternating current mains supply input interface 22, a communication interface 23 electrically connected with the RS485 interface 14, a positive and negative 12V voltage working state indicator lamp 24, a positive and negative 12V power supply voltage output interface 25 and 8 sub-communication interfaces 26 for electrically connecting the residual current collector 4;
when the monitoring system is used, firstly, a mains supply line plug is inserted into an alternating current mains supply input interface 22 to supply power to the power supply communication module 2, then the second power switch 21 is pressed to realize the on-off of the power supply communication module 2, the power supply communication module 2 converts the mains supply alternating current into positive and negative 12V voltage, and the positive and negative 12V voltage is output to the monitoring system host 1, the system alternating current voltage acquisition module 3, the plurality of residual current collectors 4 and the plurality of alternating current sensors 5, so that each module or each sensor enters a working state;
in this embodiment, 8 sub-communication interfaces 26 may be connected to 8 residual current collectors 4, and each residual current collector 4 may be hooked with a plurality of ac current sensors 5 by setting a plurality of interfaces, so that the power communication module 2 may be directly and indirectly connected to a plurality of signal collection terminals;
moreover, the power supply processing conversion function of the power supply communication module 2 can provide lower safe working voltage for other working modules, and the use safety of the system is improved.
Referring further to fig. 2, in an embodiment of the present invention:
the system alternating voltage acquisition module 3 is provided with a power supply wiring port connected with the positive and negative 12V power supply voltage output interface 25 of the power supply communication module 2 and a communication interface connected with the RS485 interface 14 of the monitoring system host 1;
in this embodiment, the system ac voltage acquisition module 3 can be set to set up numerous voltage monitoring terminals, and then realize the monitoring to the multiple spot, guarantee the accuracy of monitoring data.
Referring further to fig. 2, in an embodiment of the present invention:
the residual current collector 4 is provided with a first network communication socket 41, an 8-bit range dial switch 43 for setting the range of the residual current collector, and eight current collection wiring ports 44 for one-to-one corresponding electric connection of the alternating current sensors 5, wherein the first network communication socket 41 is electrically connected with the electronic communication interfaces 26 one-to-one corresponding through 8-core network through wires 6;
the range dial switch 43 is used to determine the address bit of the residual current collector 4, so as to ensure that the current monitoring processing signal received by the monitoring system host 1 carries the address information of the residual current collector 4.
Referring further to fig. 2, in an embodiment of the present invention:
the residual current collector 4 is provided with a network communication socket I41, a network communication socket II 42, an 8-bit range dial switch 43 for setting the range of the residual current collector, and eight current collecting wiring ports 44 for electrically connecting the alternating current sensors 5 in a one-to-one correspondence manner;
the first network communication socket 41 of the residual current collector 4 is directly electrically connected with the electronic communication interface 26 through the 8-core network through-line 6, or is directly electrically connected with the second network communication socket 42 of the other residual current collector 4 through the 8-core network through-line 6, and then the first network communication socket 41 of the other residual current collector 4 is electrically connected with the electronic communication interface 26 through the 8-core network through-line 6;
in this embodiment, two adjacent residual current collectors may be directly connected through the 8-core network through line 6, and then the network communication socket one 41 of one of the residual current collectors 4 is connected to the sub-communication interface 26, thereby further indirectly increasing the number of the residual current collectors 4 communicated by the power supply communication module 2.
Referring further to fig. 2, in an embodiment of the present invention:
the alternating current sensors 5 are connected with the current acquisition wiring ports 44 in a one-to-one corresponding mode through 4P telephone lines 7; further, the alternating current sensor 5 is provided with a 4P terminal;
one end of the 4P telephone line 7 is provided with 8P crystal heads, the other end of the 4P telephone line is fixedly connected with the 4P wiring terminals in a one-to-one corresponding mode, and the 8P crystal heads are connected with the current acquisition wiring ports 44 in a one-to-one corresponding mode;
in this embodiment, the 4P telephone line 7 is plugged into the current collection wiring port 44, which improves the wiring efficiency.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same principle as the protection scope of the present invention.
Claims (8)
1. The utility model provides a substation is residual current monitoring system of alternating current system for station which characterized in that:
the device comprises a monitoring system host (1), a power supply communication module (2), a system alternating current voltage acquisition module (3), a plurality of residual current collectors (4) and a plurality of alternating current sensors (5);
the monitoring system host (1) is electrically connected with the power supply communication module (2) and the system alternating voltage acquisition module (3);
the power supply communication module (2) is electrically connected with the system alternating voltage acquisition module (3) and the residual current collector (4);
each residual current collector (4) is electrically connected with a plurality of alternating current sensors (5).
2. The alternating current system residual current monitoring system for the substation according to claim 1, characterized in that:
the monitoring system host (1) is provided with a power switch key (11), a positive and negative 12V alternating current power supply and upper computer communication interface (12), an Ethernet interface (13), an RS485 interface (14) which is electrically connected with a power supply communication module (2) and a system alternating current voltage acquisition module (3), and an alarm signal output interface (15).
3. The alternating current system residual current monitoring system for the substation according to claim 2, characterized in that:
the power supply communication module (2) is provided with a second power switch (21), an alternating current mains supply input interface (22), a communication interface (23) electrically connected with the RS485 interface (14), a positive and negative 12V voltage working state indicator lamp (24), a positive and negative 12V power supply voltage output interface (25) and 8 sub-communication interfaces (26) used for electrically connecting the residual current collector (4).
4. The alternating current system residual current monitoring system for the substation according to claim 3, characterized in that:
the system alternating voltage acquisition module (3) is provided with a power supply wiring port connected with the positive and negative 12V power supply voltage output interface (25) of the power supply communication module (2) and a communication interface connected with the RS485 interface (14) of the monitoring system host (1).
5. The alternating current system residual current monitoring system for the substation according to claim 3, characterized in that:
the residual current collector (4) is provided with a network communication socket I (41), an 8-bit range dial switch (43) for setting the range of the residual current collector, and eight current collecting and wiring ports (44) for one-to-one corresponding electric connection of the alternating current sensors (5), wherein the network communication socket I (41) is one-to-one corresponding electric connection of the electronic communication interfaces (26) through an 8-core network through wire (6).
6. The alternating current system residual current monitoring system for the substation according to claim 3, characterized in that:
the residual current collector (4) is provided with a network communication socket I (41), a network communication socket II (42), an 8-bit range dial switch (43) for setting the range of the residual current collector, and eight current collecting wiring ports (44) for electrically connecting the alternating current sensors (5) in a one-to-one correspondence manner;
the network communication socket I (41) of the residual current collector (4) is directly electrically connected with the electronic communication interface (26) through the 8-core network through-line (6), or is directly electrically connected with the network communication socket II (42) of the other residual current collector (4) through the 8-core network through-line (6), and then the network communication socket I (41) of the other residual current collector (4) is electrically connected with the electronic communication interface (26) through the 8-core network through-line (6).
7. The alternating current system residual current monitoring system for the substation according to claim 5 or 6, characterized in that:
the alternating current sensors (5) are connected with the current acquisition wiring ports (44) in a one-to-one correspondence mode through 4P telephone lines (7).
8. The alternating current system residual current monitoring system for the substation according to claim 7, characterized in that:
the alternating current sensor (5) is provided with a 4P wiring terminal;
4P telephone line (7) one end sets up 8P crystal head, and the other end one-to-one corresponds fixed connection 4P binding post, 8P crystal head one-to-one grafting electric current gathers wiring port (44).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021463818.4U CN213337783U (en) | 2020-07-22 | 2020-07-22 | Residual current monitoring system of alternating current system for transformer substation |
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| CN202021463818.4U CN213337783U (en) | 2020-07-22 | 2020-07-22 | Residual current monitoring system of alternating current system for transformer substation |
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| CN213337783U true CN213337783U (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062756A (en) * | 2021-10-19 | 2022-02-18 | 许继电源有限公司 | Residual current monitoring device and system of feeder circuit |
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2020
- 2020-07-22 CN CN202021463818.4U patent/CN213337783U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062756A (en) * | 2021-10-19 | 2022-02-18 | 许继电源有限公司 | Residual current monitoring device and system of feeder circuit |
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