CN209896776U - Monitoring and protecting system for effective operation of multiple parallel transformers - Google Patents
Monitoring and protecting system for effective operation of multiple parallel transformers Download PDFInfo
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- CN209896776U CN209896776U CN201920979227.3U CN201920979227U CN209896776U CN 209896776 U CN209896776 U CN 209896776U CN 201920979227 U CN201920979227 U CN 201920979227U CN 209896776 U CN209896776 U CN 209896776U
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Abstract
The utility model relates to a monitoring and protecting system for the parallel effective operation of a plurality of transformers, belonging to the field of industrial automatic control, comprising a controller, high-voltage lines, a high-voltage connection cabinet, a first high-voltage transformer cabinet, a second high-voltage transformer cabinet, a first low-voltage incoming line cabinet, a second low-voltage incoming line cabinet and a low-voltage connection cabinet, wherein two high-voltage lines are connected in parallel through the high-voltage connection cabinet, and the high-voltage connection cabinet is respectively connected with the first high-voltage transformer cabinet and the second high-voltage transformer cabinet through wires, the utility model can monitor the parallel circuit of the plurality of transformers, send out alarm signals and disconnect the low-voltage connection cabinet in a delayed way when faults are found, thereby ensuring that all loads of the two lines are not loaded on one transformer, avoiding the transformer from faults due to the rise of excessive temperature, ensuring the safety and stability of a power supply system, and reflecting, after the alarm is given, the system can be checked and maintained in time, or two lines can be disconnected in a delayed manner, so that the safety and stability of the power supply system are ensured.
Description
Technical Field
The utility model relates to a parallelly connected monitoring protection system of effective operation of many transformers belongs to the industry automatic control field.
Background
In the existing power supply and distribution system, in order to transmit electric energy more efficiently and stably, several kilovolts, dozens of kilovolts or even higher voltage levels are often used, and the voltage levels are reduced to the requirements of users after reaching the destination, so that a transformer is a common device in a power system;
in a distribution system of a mine, a transmission mode of high voltage to low voltage is also adopted, the number of equipment used in the mine is more, the power is higher, each distribution room at present is provided with two transformers and two sets of equipment power supply systems, the two transformers are connected in parallel to run, the use pressure of a single transformer can be reduced when the equipment is fully loaded, the working temperature of the single transformer is prevented from being higher, and the power can be supplied by a wire inlet cabinet at the other side through a connection cabinet when a single-side power supply system fails;
because the transformer is a device capable of bidirectional input and output, the transformer can change high voltage into low voltage and can also change low voltage into high voltage, when one side of the high voltage is electrically disconnected, the low voltage can be changed into high voltage through the transformer, at the moment, the transformer is changed from a power supply device into a load, the load of another transformer is further increased, the transformer device is easily damaged, and a power supply system is broken down, so that a set of system is needed to monitor whether the parallel transformers are in a running state or not.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the device provides monitoring of effective operation of the parallel transformer, when one transformer works abnormally, an alarm can be sent out in time, the alarm is directly transmitted to the dispatching room through the communication data looped network, and the safe and efficient operation of a power supply system is facilitated.
In order to solve the technical problem, the utility model provides a following technical scheme:
a monitoring and protecting system for effective operation of multiple parallel transformers comprises a controller, a high-voltage line, a high-voltage connection cabinet, a first high-voltage transformer cabinet, a second high-voltage transformer cabinet, a first low-voltage incoming line cabinet, a second low-voltage incoming line cabinet and a low-voltage connection cabinet, wherein the two high-voltage lines are connected in parallel through the high-voltage connection cabinet;
the low-voltage connection cabinet is respectively connected with the first low-voltage incoming line cabinet and the second low-voltage incoming line cabinet through electric wires, a first delay disconnection relay and a second delay disconnection relay are fixedly arranged on two sides of the low-voltage connection cabinet respectively, low-voltage circuits are arranged on two sides of the low-voltage connection cabinet respectively, and the controller is respectively connected with the first high-voltage transformer cabinet, the second high-voltage transformer cabinet, the first low-voltage incoming line cabinet, the second low-voltage incoming line cabinet, the first delay disconnection relay and the second delay disconnection relay through electric wires.
Further, transformers are arranged in the first high-voltage transformer cabinet and the second high-voltage transformer cabinet.
Further, a first inverse power relay is arranged between the first high-voltage transformer cabinet and the first low-voltage incoming line cabinet.
Further, a second inverse power relay is arranged between the second high-voltage transformer cabinet and the second low-voltage incoming line cabinet.
Further, the first delay disconnection relay is electrically connected with the first low-voltage incoming line cabinet.
Further, the second delay disconnection relay is electrically connected with the second low-voltage incoming line cabinet.
The utility model discloses beneficial effect:
the utility model discloses can be effectual the monitoring of two shunt transformers effective operation of detection, can in time send alarm signal and can delay time and break off two circuits when the circuit breaker disconnection, guarantee that the transformer can not cause the high temperature and damage because of the load is too big, guarantee power supply system safety and stability's operation.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view of the connection relationship of the present invention.
Fig. 2 is an electrical connection diagram of the controller of the present invention.
Reference numbers in the figures: 1. a high-voltage connection cabinet; 2. a first high voltage transformer cabinet; 3. a first low-voltage incoming cabinet; 4. a low-voltage communication cabinet; 5. a first reverse power relay; 6. a first time-delay disconnect relay; 7. a second high voltage transformer cabinet; 8. a second low-voltage incoming cabinet; 9. a second reverse power relay; 10. a second time-delay disconnect relay; 11. a high voltage line; 12. a low voltage line; 13. and a controller.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 to 2, a monitoring and protecting system for parallel connection and effective operation of multiple transformers comprises a controller 13, high-voltage lines 11, a high-voltage connection cabinet 1, a first high-voltage transformer cabinet 2, a second high-voltage transformer cabinet 7, a first low-voltage incoming line cabinet 3, a second low-voltage incoming line cabinet 8 and a low-voltage connection cabinet 4, wherein the two high-voltage lines 11 are connected in parallel through the high-voltage connection cabinet 1, the high-voltage connection cabinet 1 is respectively connected with the first high-voltage transformer cabinet 2 and the second high-voltage transformer cabinet 7 through electric wires, the first high-voltage transformer cabinet 2 is connected with the first low-voltage incoming line cabinet 3 through an electric wire, and the second high-voltage transformer cabinet 7 is connected with the second low-voltage incoming line cabinet 8 through an electric wire;
the low-voltage connection cabinet 4 is respectively connected with the first low-voltage incoming cabinet 3 and the second low-voltage incoming cabinet 8 through electric wires, the two sides of the low-voltage connection cabinet 4 are respectively and fixedly provided with a first delay disconnection relay 6 and a second delay disconnection relay 10, the two sides of the low-voltage connection cabinet 4 are respectively provided with a low-voltage circuit 12, and the controller 13 is respectively connected with the first high-voltage transformer cabinet 2, the second high-voltage transformer cabinet 7, the first low-voltage incoming cabinet 3, the second low-voltage incoming cabinet 8, the first delay disconnection relay 6 and the second delay disconnection relay 10 through electric wires.
The controller 13 is SPC-CFMC-D20N24A, and transformers are disposed in the first high-voltage transformer cabinet 2 and the second high-voltage transformer cabinet 7.
A first inverse power relay 5 is arranged between the first high-voltage transformer cabinet 2 and the first low-voltage incoming line cabinet 3.
A second inverse power relay 9 is arranged between the second high-voltage transformer cabinet 7 and the second low-voltage incoming line cabinet 8.
The first time delay disconnection relay 6 is electrically connected with the first low-voltage incoming line cabinet 3.
The second time delay disconnection relay 10 is electrically connected with the second low-voltage incoming line cabinet 8.
The utility model discloses the theory of operation: when in use, a normally open point is taken on the circuit breakers of the first high-voltage transformer cabinet 2 and the second high-voltage transformer cabinet 7, a normally open point is taken on the circuit breakers of the first low-voltage incoming cabinet 3 and the second low-voltage incoming cabinet 8, the normally open points are closed when the circuit breakers are closed, the two normally open points are connected in series and are simultaneously connected with the controller 13 to be used as a trigger device, when one circuit breaker is disconnected, the normally open point is powered off, the first time delay disconnection relay 6 or the second time delay disconnection relay 10 is simultaneously opened, the circuit is determined according to which circuit the disconnected circuit breaker is positioned, then timing preparation for disconnection is started, the controller 13 sends out an alarm signal on-site alarm and transmits the alarm signal to the dispatching room through a network, the dispatching room can be checked and maintained by contacting with a professional on-site, and a signal is output when the timing time of the first time delay disconnection relay 6 or the second time delay disconnection relay 10 reaches the time when the fault is not, the signal can disconnect the circuit breaker of the low-voltage interconnection cabinet 4, so that the corresponding circuits of the two high-voltage lines 11 can be separated, and the excessive load of a single transformer is avoided;
meanwhile, reverse power relays are installed at the low-voltage lines of the two transformers for detection, namely a first reverse power relay 5 between the first high-voltage transformer cabinet 2 and the first low-voltage incoming line cabinet 3 and a second reverse power relay 9 between the second high-voltage transformer cabinet 7 and the second low-voltage incoming line cabinet 8, when a fault occurs, the transformers are equivalent to 'return power transmission' to the system, double-path detection can be performed on the system, the reliability of alarming is improved, the monitoring of effective operation of the two parallel transformers can be effectively detected, when the circuit breaker is disconnected, an alarm signal can be timely sent out, the two lines can be disconnected in time, the transformers cannot be damaged due to overhigh temperature caused by overlarge load, and the safe and stable operation of a power supply system is ensured.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a parallelly connected effective monitoring protection system who operates of many transformers, includes controller (13), high-voltage line (11), high-voltage connection cabinet (1), first high-voltage transformer cabinet (2), second high-voltage transformer cabinet (7), first low pressure inlet wire cabinet (3), second low pressure inlet wire cabinet (8) and low pressure connection cabinet (4), its characterized in that: the two high-voltage lines (11) are connected in parallel through the high-voltage connection cabinet (1), the high-voltage connection cabinet (1) is respectively connected with the first high-voltage transformer cabinet (2) and the second high-voltage transformer cabinet (7) through electric wires, the first high-voltage transformer cabinet (2) is connected with the first low-voltage incoming line cabinet (3) through electric wires, and the second high-voltage transformer cabinet (7) is connected with the second low-voltage incoming line cabinet (8) through electric wires;
the low-voltage connection cabinet (4) is respectively connected with the first low-voltage incoming line cabinet (3) and the second low-voltage incoming line cabinet (8) through electric wires, a first delay disconnection relay (6) and a second delay disconnection relay (10) are respectively fixedly arranged on two sides of the low-voltage connection cabinet (4), low-voltage lines (12) are respectively arranged on two sides of the low-voltage connection cabinet (4), and a controller (13) is respectively connected with the first high-voltage transformer cabinet (2), the second high-voltage transformer cabinet (7), the first low-voltage incoming line cabinet (3), the second low-voltage incoming line cabinet (8), the first delay disconnection relay (6) and the second delay disconnection relay (10) through electric wires.
2. The monitoring and protection system for the parallel effective operation of a plurality of transformers according to claim 1, is characterized in that: transformers are arranged in the first high-voltage transformer cabinet (2) and the second high-voltage transformer cabinet (7).
3. The monitoring and protection system for the parallel effective operation of a plurality of transformers according to claim 1, is characterized in that: and a first inverse power relay (5) is arranged between the first high-voltage transformer cabinet (2) and the first low-voltage incoming line cabinet (3).
4. The monitoring and protection system for the parallel effective operation of a plurality of transformers according to claim 1, is characterized in that: and a second inverse power relay (9) is arranged between the second high-voltage transformer cabinet (7) and the second low-voltage incoming line cabinet (8).
5. The monitoring and protection system for the parallel effective operation of a plurality of transformers according to claim 1, is characterized in that: the first delay disconnection relay (6) is electrically connected with the first low-voltage incoming line cabinet (3).
6. The monitoring and protection system for the parallel effective operation of a plurality of transformers according to claim 1, is characterized in that: and the second delay disconnection relay (10) is electrically connected with the second low-voltage incoming line cabinet (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979227.3U CN209896776U (en) | 2019-06-27 | 2019-06-27 | Monitoring and protecting system for effective operation of multiple parallel transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979227.3U CN209896776U (en) | 2019-06-27 | 2019-06-27 | Monitoring and protecting system for effective operation of multiple parallel transformers |
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| Publication Number | Publication Date |
|---|---|
| CN209896776U true CN209896776U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920979227.3U Active CN209896776U (en) | 2019-06-27 | 2019-06-27 | Monitoring and protecting system for effective operation of multiple parallel transformers |
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| Country | Link |
|---|---|
| CN (1) | CN209896776U (en) |
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- 2019-06-27 CN CN201920979227.3U patent/CN209896776U/en active Active
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