CN211879790U - High-voltage circuit breaker control circuit of high-voltage switch cabinet - Google Patents
High-voltage circuit breaker control circuit of high-voltage switch cabinet Download PDFInfo
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- CN211879790U CN211879790U CN202020396430.0U CN202020396430U CN211879790U CN 211879790 U CN211879790 U CN 211879790U CN 202020396430 U CN202020396430 U CN 202020396430U CN 211879790 U CN211879790 U CN 211879790U
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Abstract
The utility model discloses a high tension switchgear's high-tension circuit breaker control circuit, including combined floodgate control circuit, tripping operation control circuit, combined floodgate control circuit includes experimental combined floodgate circuit and cubical switchboard combined floodgate circuit. The test closing circuit comprises a test/operation position switch SWK and a normally open button SB which are connected in series, and a normally closed contact of an intermediate relay KA is connected in series with a first contact 304 of the negative electrode of the first relay protection device. The switch cabinet closing circuit comprises a switch cabinet position switch YWK, an automatic switch ZK and a first transfer switch KK which are connected in series. The normally closed contact of the intermediate relay KA and the second contact 303 of the negative electrode of the first relay protection device of the switch cabinet closing circuit are connected in parallel on the circuit breaker QF, and the intermediate relay KA is arranged on the grounding knife switch control circuit of the high-voltage switch cabinet. The control circuit of the high-voltage circuit breaker is simple in connection and easy to realize, and the safety of the high-voltage circuit breaker can be improved.
Description
Technical Field
The utility model belongs to the technical field of high tension switchgear's high-voltage circuit breaker control, concretely relates to high tension switchgear's high-voltage circuit breaker control circuit.
Background
The switch cabinet is a complete set of electrical equipment mainly based on switches, and is used for receiving and distributing electric energy in a power distribution system, and controlling, measuring, protecting and adjusting lines. The device is used for power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system and plays roles of switching on and off, controlling or protecting and the like. The high-voltage switch cabinet consists of a cabinet body and two high-voltage circuit breakers, wherein the high-voltage circuit breakers are used as main elements for receiving and distributing electric energy.
The high-voltage vacuum high-voltage circuit breaker basically adopts electric switching-on and electric switching-off control, and has two modes of local operation and remote operation. After the high-voltage power supply is in voltage loss, the opening control of the high-voltage switch cabinet is completely controlled by manually operating the opening no matter in local operation or remote operation, and the automatic opening protection of the high-voltage power supply is not provided, so that if the manual operation is not timely performed, the load is not disconnected with a main power supply loop when the high-voltage power supply recovers power supply, the load can suddenly operate and work, and major production accidents are caused.
Meanwhile, when the grounding knife switch is closed frequently in the daily operation process of the high-voltage switch cabinet, the high-voltage circuit breaker also enters the switch box at the working position, so that the equipment damage event is caused. For example: when a certain transformer substation grounding switch is located to close, the high-voltage circuit breaker is located to close simultaneously, leads to the insulating damage occurence of failure of main transformer winding, and the main reason that causes above-mentioned grounding switch and high-voltage circuit breaker to be located to close simultaneously has: 1. the switch cabinet is damaged by five-prevention locking; 2. misoperation of personnel; 3. switch cabinet protection monitoring system faults and the like. Through the analysis, cause the root cause of high tension switchgear equipment damage because: the measures of the high-voltage switch cabinet for preventing the grounding knife switch and the high-voltage circuit breaker from being simultaneously positioned at the switching-on position are only mechanical interlocking and are not electrical interlocking aiming at a switching-on loop of the high-voltage circuit breaker.
Therefore, there is a need for an improved way of controlling a high voltage circuit breaker of a high voltage switchgear.
SUMMERY OF THE UTILITY MODEL
For solving high tension switchgear because "five prevent" shutting inefficacy, personnel maloperation, high tension switchgear protection system trouble etc. cause that grounding switch and high tension circuit breaker are located the floodgate simultaneously and close the position, and cause occurence of failure such as equipment damage or personnel are injured, the utility model provides a high tension circuit breaker control circuit of high tension switchgear.
Realize the utility model discloses the technical scheme of purpose as follows: a high-voltage circuit breaker control circuit of a high-voltage switch cabinet comprises a closing control circuit and a tripping control circuit which are connected in parallel at the two ends of a positive electrode and a negative electrode of a power supply. The switching-on control circuit and the tripping control circuit form a high-voltage circuit breaker control loop, and the switching-on control circuit comprises a test switching-on circuit and a switch cabinet switching-on circuit.
The test closing circuit comprises a test/operation position switch SWK and a normally open button SB which are connected in series with a first positive contact 306 of the first relay protection device PDS, and a normally closed contact of the intermediate relay KA is connected in series with a first negative contact 304 of the first relay protection device PDS.
The switch cabinet closing circuit comprises a switch cabinet position switch YWK, an automatic switch ZK and a first transfer switch KK, wherein the switch cabinet position switch YWK, the automatic switch ZK and the first transfer switch KK are connected in series on a positive second contact 328 of the first relay protection device PDS.
The normally closed contact of the intermediate relay KA and the second negative contact 303 of the first relay protection device PDS of the switch cabinet closing circuit are connected in parallel on the circuit breaker QF operating mechanism, and a circuit breaker closing coil HQ and the normally closed contact of the circuit breaker QF are arranged in the circuit breaker QF operating mechanism.
In order to associate the grounding disconnecting link control circuit with the high-voltage circuit breaker control circuit, the grounding disconnecting link control circuit and the high-voltage circuit breaker control circuit are switched on and off when different, the safety operation of the high-voltage switch cabinet is improved, and the intermediate relay KA is arranged on the grounding disconnecting link control circuit of the high-voltage switch cabinet.
The utility model discloses high voltage circuit breaker control circuit's principle is, sets up auxiliary relay KA on high tension switchgear's ground connection switch control circuit to the normally closed contact of series connection auxiliary relay KA on combined floodgate control circuit. When the grounding knife switch is in the closed position, the normally closed contact of the intermediate relay KA is disconnected, the switching-on control circuit is disconnected, the high-voltage circuit breaker cannot be switched on at the moment, and the circuit breaker and the grounding knife switch are prevented from being switched on simultaneously. When the grounding knife switch is opened, the normally closed contact of the intermediate relay KA is closed, the closing control circuit is conducted, and the high-voltage circuit breaker can be opened and closed according to a normal program.
As a further improvement of the embodiment, the trip control circuit comprises a high-voltage switch cabinet trip circuit, a protection trip circuit, a rectifier cabinet fault circuit and a process connection trip circuit. The tripping control circuit is connected with a positive contact of the first relay protection device PDS, and a breaker opening coil TQ and a normally open contact of the breaker QF are connected in series between a negative contact of the first relay protection device PDS and a power supply negative electrode.
As a further improvement of the trip control circuit, a second change-over switch KK is arranged on the trip circuit of the high-voltage switch cabinet, and the second change-over switch KK is connected in series with the positive third contact 309 and the positive fourth contact 326 of the first relay protection device PDS.
The trip protection circuit comprises a second relay protection device PDS circuit and a third relay protection device PDS circuit which are arranged in parallel, and the second relay protection device PDS circuit and the trip protection pressing plate XB2 are arranged on the second relay protection device PDS circuit in series. And a third relay protection device PDS and a tripping protection pressing plate XB3 are connected in series on the circuit of the third relay protection device PDS.
The fault circuit of the rectifier cabinet is provided with a circuit board superposed connector LCP and a tripping protection pressure plate XB4 in series.
The process tripping circuit is connected with a switch and a tripping protection pressing plate XB5 in series.
As a further improvement of the trip control circuit, the trip protection pressing plate XB2, the trip protection pressing plate XB3, the trip protection pressing plate XB4 and the trip protection pressing plate XB5 are connected in parallel and then connected in series with the trip protection pressing plate XB1, and the trip protection pressing plate XB1 is connected in series and arranged on the positive fourth contact 312 of the first relay protection device PDS.
The trip protection pressure plate XB2, the trip protection pressure plate XB3, the trip protection pressure plate XB4 and the trip protection pressure plate XB5 are connected in parallel and then connected to the positive fifth contact 311 of the first relay protection device PDS.
As right the utility model discloses a further improvement, high voltage circuit breaker control circuit still includes the signal return circuit, and the signal return circuit sets up at the positive negative pole both ends of power with high voltage circuit breaker control circuit is parallelly connected.
The signal loop comprises a tripping indicating circuit and a closing indicating circuit, a normally closed contact of the high-voltage circuit breaker and a display lamp GN which are connected in series are arranged on the tripping indicating circuit, and a normally open contact of the high-voltage circuit breaker and a display lamp RD which are connected in series are arranged on the closing indicating circuit. When the high-voltage circuit breaker is located the closing position, the normally closed contact of the high-voltage circuit breaker acts and breaks off, the display lamp GN does not work, the normally open contact of the high-voltage circuit breaker acts and closes, and the display lamp RD works and displays the red indicator lamp. When the high-voltage circuit breaker is located the position of opening the floodgate, the normally closed contact of high-voltage circuit breaker does not take place the action, and the green lamp is shown in the work of display lamp GN, and action takes place for high-voltage circuit breaker normally open contact portion, and display lamp RD is out of work.
Compared with the prior art, the beneficial effects of the utility model are that: when the grounding knife switch is in the off position, the control circuit of the high-voltage circuit breaker is conducted, and the high-voltage circuit breaker can be normally switched on; when the grounding disconnecting link is in the closed position, the control circuit of the high-voltage circuit breaker is disconnected, the high-voltage circuit breaker cannot be switched on, the grounding disconnecting link of the high-voltage switch cabinet and the high-voltage circuit breaker are completely stopped from being in the closed position at the same time, the safety of the high-voltage switch cabinet is improved, and therefore accidents such as equipment damage and personnel injury are avoided.
Drawings
Fig. 1 is a circuit diagram of a high-voltage circuit breaker control circuit of the high-voltage switch cabinet of the utility model;
fig. 2 is a schematic circuit diagram of the ground switch control circuit of the high voltage switch cabinet of the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1:
in the present embodiment, as shown in fig. 1, the high-voltage circuit breaker control circuit includes a closing control circuit and a tripping control circuit connected in parallel to both ends of a positive electrode and a negative electrode of a power supply. The switching-on control circuit and the tripping control circuit form a high-voltage circuit breaker control loop, and the switching-on control circuit comprises a test switching-on circuit and a switch cabinet switching-on circuit.
The test closing circuit comprises a test/operation position switch SWK and a normally open button SB which are connected in series with a first positive contact 306 of the first relay protection device PDS, and a normally closed contact of the intermediate relay KA is connected in series with a first negative contact 304 of the first relay protection device PDS.
The switch cabinet closing circuit comprises a switch cabinet position switch YWK, an automatic switch ZK and a first transfer switch KK, wherein the switch cabinet position switch YWK, the automatic switch ZK and the first transfer switch KK are connected in series on a positive second contact 328 of the first relay protection device PDS.
The normally closed contact of the intermediate relay KA and the second negative contact 303 of the first relay protection device PDS of the switch cabinet closing circuit are connected in parallel on the circuit breaker QF operating mechanism, and a circuit breaker closing coil HQ and the normally closed contact of the circuit breaker QF are arranged in the circuit breaker QF operating mechanism.
As shown in fig. 2, in order to associate the grounding switch control circuit with the high-voltage circuit breaker control circuit, and ensure that the grounding switch control circuit and the high-voltage circuit breaker control circuit are switched on and off when they are different, the safety operation of the high-voltage switch cabinet is improved, and the grounding switch control circuit of the high-voltage switch cabinet is provided with an intermediate relay KA.
In the present embodiment, the model of the first relay protection device PDS is PDS-745A.
The principle of the high-voltage circuit breaker control circuit of the embodiment is that the intermediate relay KA is arranged on a grounding knife switch control loop of the high-voltage switch cabinet, and a normally closed contact of the intermediate relay KA is connected in series on the closing control circuit. When the grounding knife switch is in the closed position, the normally closed contact of the intermediate relay KA is disconnected, the switching-on control circuit is disconnected, the high-voltage circuit breaker cannot be switched on at the moment, and the circuit breaker and the grounding knife switch are prevented from being switched on simultaneously. When the grounding knife switch is opened, the normally closed contact of the intermediate relay KA is closed, the closing control circuit is conducted, and the high-voltage circuit breaker can be opened and closed according to a normal program.
Example 2:
as a further improvement to the above embodiment 1, as shown in fig. 1, the trip control circuit includes a high-voltage switch cabinet trip circuit, a protection trip circuit, a rectifier cabinet fault circuit, and a process interconnection trip circuit. The tripping control circuit is connected with a positive contact of the first relay protection device PDS, and a breaker opening coil TQ and a normally open contact of the breaker QF are connected in series between a negative contact of the first relay protection device PDS and a power supply negative electrode.
As a further improvement of the above-mentioned trip control circuit, as shown in fig. 1, a second transfer switch KK is provided on the trip circuit of the high voltage switch cabinet, and the second transfer switch KK is connected in series to the positive third contact 309 and the positive fourth contact 326 of the first relay protection device PDS.
The trip protection circuit comprises a second relay protection device PDS circuit and a third relay protection device PDS circuit which are arranged in parallel, and the second relay protection device PDS circuit and the trip protection pressing plate XB2 are arranged on the second relay protection device PDS circuit in series. And a third relay protection device PDS and a tripping protection pressing plate XB3 are connected in series on the circuit of the third relay protection device PDS. In this embodiment, the second relay protection device PDS and the third relay protection device PDS are model number PDS-745A.
A circuit board superposed connector LCP and a tripping protection pressing plate XB4 are arranged on a fault circuit of the rectifier cabinet in series, and in the embodiment, the model of the circuit board superposed connector LCP is LCP11.
The process tripping circuit is connected with a switch and a tripping protection pressing plate XB5 in series.
As a further improvement to the above-mentioned trip control circuit, as shown in fig. 1, the trip protection pressing plate XB2, the trip protection pressing plate XB3, the trip protection pressing plate XB4 and the trip protection pressing plate XB5 are connected in parallel and then connected in series with the trip protection pressing plate XB1, and the trip protection pressing plate XB1 is connected in series to the positive fourth contact 312 of the first relay protection device PDS.
The trip protection pressure plate XB2, the trip protection pressure plate XB3, the trip protection pressure plate XB4 and the trip protection pressure plate XB5 are connected in parallel and then connected to the positive fifth contact 311 of the first relay protection device PDS.
As a further improvement to this embodiment and embodiment 1, as shown in fig. 1, the high-voltage circuit breaker control circuit further includes a signal loop, and the signal loop and the high-voltage circuit breaker control loop are connected in parallel and disposed at two ends of the positive electrode and the negative electrode of the power supply.
The signal loop comprises a tripping indicating circuit and a closing indicating circuit, a normally closed contact of the high-voltage circuit breaker and a display lamp GN which are connected in series are arranged on the tripping indicating circuit, and a normally open contact of the high-voltage circuit breaker and a display lamp RD which are connected in series are arranged on the closing indicating circuit. When the high-voltage circuit breaker is located the closing position, the normally closed contact of the high-voltage circuit breaker acts and breaks off, the display lamp GN does not work, the normally open contact of the high-voltage circuit breaker acts and closes, and the display lamp RD works and displays the red indicator lamp. When the high-voltage circuit breaker is located the position of opening the floodgate, the normally closed contact of high-voltage circuit breaker does not take place the action, and the green lamp is shown in the work of display lamp GN, and action takes place for high-voltage circuit breaker normally open contact portion, and display lamp RD is out of work.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
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 (5)
1. A high-voltage circuit breaker control circuit of a high-voltage switch cabinet comprises a closing control circuit and a tripping control circuit which are connected in parallel at two ends of a positive electrode and a negative electrode of a power supply, wherein the closing control circuit and the tripping control circuit form a high-voltage circuit breaker control loop, and the closing control circuit comprises a test closing circuit and a switch cabinet closing circuit; the method is characterized in that: the test closing circuit comprises a test/operation position switch SWK and a normally open button SB which are connected in series with a first positive contact 306 of the first relay protection device PDS, and a normally closed contact of the intermediate relay KA is connected in series with a first negative contact 304 of the first relay protection device PDS;
the switch cabinet closing circuit comprises a switch cabinet position switch YWK, an automatic switch ZK and a first transfer switch KK which are connected in series with a second positive contact 328 of the first relay protection device PDS;
a normally closed contact of the intermediate relay KA and a negative electrode second contact 303 of a first relay protection device PDS of the switch cabinet closing circuit are connected in parallel on the circuit breaker QF operating mechanism, and a circuit breaker closing coil HQ and a normally closed contact of the circuit breaker QF are arranged in the circuit breaker QF operating mechanism;
an intermediate relay KA is arranged on a grounding knife switch control circuit of the high-voltage switch cabinet.
2. The control circuit for a high-voltage circuit breaker of a high-voltage switchgear cabinet as claimed in claim 1, characterized in that: the tripping control circuit comprises a high-voltage switch cabinet tripping circuit, a protection tripping circuit, a rectifier cabinet fault circuit and a process combined tripping circuit;
the tripping control circuit is connected with a positive contact of a first relay protection device PDS, and a breaker opening coil TQ and a normally open contact of a breaker QF are connected in series between a negative contact of the first relay protection device PDS and a power supply negative electrode.
3. The control circuit for a high-voltage circuit breaker of a high-voltage switchgear cabinet as claimed in claim 2, characterized in that: a second change-over switch KK is arranged on the trip circuit of the high-voltage switch cabinet, and the second change-over switch KK is arranged on the anode third contact 309 and the anode fourth contact 326 of the first relay protection device PDS in series;
the trip protection circuit comprises a second relay protection device PDS circuit and a third relay protection device PDS circuit which are arranged in parallel, and the second relay protection device PDS circuit and a trip protection pressing plate XB2 are arranged on the second relay protection device PDS circuit in series; a third relay protection device PDS and a tripping protection pressing plate XB3 are connected in series on the circuit of the third relay protection device PDS;
a circuit board superposed connector LCP and a tripping protection pressing plate XB4 are connected in series on the fault circuit of the rectifier cabinet;
and a switch and a tripping protection pressing plate XB5 are connected in series on the process tripping circuit.
4. A high voltage circuit breaker control circuit of a high voltage switchgear, according to claim 3, characterized in that: the trip protection pressing plate XB2, the trip protection pressing plate XB3, the trip protection pressing plate XB4 and the trip protection pressing plate XB5 are connected in parallel and then connected in series with the trip protection pressing plate XB1, and the trip protection pressing plate XB1 is connected in series with the positive fourth contact 312 of the first relay protection device PDS;
the trip protection pressing plate XB2, the trip protection pressing plate XB3, the trip protection pressing plate XB4 and the trip protection pressing plate XB5 are connected in parallel and then connected to the positive electrode fifth contact 311 of the first relay protection device PDS.
5. The control circuit for a high-voltage circuit breaker of a high-voltage switchgear cabinet as claimed in claim 1, characterized in that: the high-voltage circuit breaker control circuit also comprises a signal loop, and the signal loop and the high-voltage circuit breaker control loop are arranged at the two ends of the positive electrode and the negative electrode of the power supply in parallel;
the signal loop comprises a tripping indicating circuit and a closing indicating circuit, wherein the tripping indicating circuit is provided with a normally closed contact of a high-voltage circuit breaker and a display lamp GN which are connected in series, and the closing indicating circuit is provided with a normally open contact of the high-voltage circuit breaker and a display lamp RD which are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396430.0U CN211879790U (en) | 2020-03-25 | 2020-03-25 | High-voltage circuit breaker control circuit of high-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396430.0U CN211879790U (en) | 2020-03-25 | 2020-03-25 | High-voltage circuit breaker control circuit of high-voltage switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN211879790U true CN211879790U (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020396430.0U Active CN211879790U (en) | 2020-03-25 | 2020-03-25 | High-voltage circuit breaker control circuit of high-voltage switch cabinet |
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| Country | Link |
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| CN (1) | CN211879790U (en) |
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- 2020-03-25 CN CN202020396430.0U patent/CN211879790U/en active Active
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