CN213400931U - Locking logic loop of 750kV line additionally provided with current-limiting reactor wiring - Google Patents
Locking logic loop of 750kV line additionally provided with current-limiting reactor wiring Download PDFInfo
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- CN213400931U CN213400931U CN202022457319.0U CN202022457319U CN213400931U CN 213400931 U CN213400931 U CN 213400931U CN 202022457319 U CN202022457319 U CN 202022457319U CN 213400931 U CN213400931 U CN 213400931U
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Abstract
The utility model discloses a 750kV circuit installs shutting logic circuit of current-limiting reactor wiring additional belongs to the electric power system field. The utility model discloses a 750kV circuit installs current-limiting reactor additional, and each group current-limiting reactor both sides respectively through 1 group isolator Q11, isolator Q12 cluster circuit, establish 1 group bypass isolator Q13 on each group series reactor; according to the five-prevention requirement of a power system, the safety operation of a disconnecting link in the working condition process of converting the series-reactance operation of a line to the operation without the series-reactance operation of the line and then converting the operation to the series-reactance operation of the line, the shutdown operation sequence and the power transmission operation sequence of the line with the series-reactance operation are considered, and the requirement that a series-reactance side grounding switch is not used as a line grounding disconnecting link and the like in line maintenance is combined with scheduling, a five-prevention locking logic loop in the wiring mode that a current-limiting reactor is additionally arranged on a 750kV line is provided, and the safety operation and the personal safety of power equipment are guaranteed.
Description
Technical Field
The utility model belongs to the electric power system field, especially 750kV circuit installs the shutting logic circuit of current-limiting reactor wiring additional.
Background
The locking logic of the project of additionally arranging the current-limiting reactor on the early 500kV line is realized by the internal setting logic in the background of the computer monitoring system, and no external electric interlocking loop is connected. The safety reliability is low for high voltage class latching logic circuits.
In order to effectively limit the interval short-circuit current of the circuit breakers in the 750kV string, a current-limiting reactor is additionally arranged on the 750kV line. New implementation schemes need to be proposed to ensure the safe operation and personal safety of the power equipment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem of the safe operation of 750kV circuit install current-limiting reactor back relevant equipment additional, provide the shutting logic circuit of 750kV circuit install current-limiting reactor wiring additional.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a closed logic loop of the wiring of a current-limiting reactor is additionally arranged on a 750kV circuit, a current-limiting reactor is additionally arranged on the 750kV circuit, two sides of each group of current-limiting reactors are respectively connected into the circuit in series through 1 group of isolating switches Q11 and Q12, and 1 group of bypass isolating switches Q13 are arranged on each group of series reactors;
two sides of the isolating switch Q11 are respectively provided with an earthing switch Q111 and an earthing switch Q112, and two sides of the isolating switch Q12 are respectively provided with an earthing switch Q121 and an earthing switch Q122;
a switch G12 and a switch G13 are arranged at intervals of the 750kV in-string circuit breaker to control the input of the current-limiting impedor, and the input end of the current-limiting impedor is also provided with a grounding switch G23;
the latching logic loop of the isolating switch Q11 is:
when the grounding switch Q111, the grounding switch Q112, the switch G12, the switch G13, the grounding switch G23 and the bypass isolating switch Q13 are in the separated position, the isolating switch Q11 can be operated in place;
the latching logic loop of the isolating switch Q12 is:
when the grounding switch Q121, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G2 and the bypass isolating switch Q13 are in the separated position, the isolating switch Q12 can be operated in place;
the latching logic of the grounding switch Q111 is:
when the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13 are in the separated position, the grounding switch Q111 can be operated in place;
the latching logic for ground switch Q122 is:
when the isolation switch Q12 is in the open position, the bypass isolation switch Q13 is in the closed position, and the line PT shows no voltage, the grounding switch Q122 can be operated in place;
the latching logic for the ground switch Q112 is:
when the isolating switch Q11 and the isolating switch Q12 are in the separated position, the grounding switch Q112 can be operated in place;
the latching logic of the grounding switch Q121 is:
when the isolating switch Q11 and the isolating switch Q12 are in the separated position, the grounding switch Q121 can be operated in place;
the latching logic loop for the bypass isolation switch Q13 is:
when the grounding switch Q111, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G23, the isolation switch Q11 and the isolation switch Q12 are in the separated position, the bypass isolation switch Q13 can be operated in place.
Further, the latching logic loop of the isolating switch Q11 is:
the isolation switch Q11 latches the logic loop into the normally closed position nodes of the ground switch Q111, the ground switch Q112, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13.
Further, the latching logic loop of the isolating switch Q12 is:
the isolation switch Q12 latches the logic loop into the normally closed position nodes of the ground switch Q121, the ground switch Q122, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13.
Further, the latching logic loop of the ground switch Q111 is:
the grounding switch Q111 locks a logic loop and is connected in series with the normally closed position nodes of the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13.
Further, the latching logic loop of the ground switch Q122 is:
the ground switch Q122 latches the logic loop into the normally closed position node of the isolation switch Q12, the normally open position node of the bypass isolation switch Q13, and the PT live latch node.
Further, the latching logic of the ground switch Q112 is:
the grounding switch Q112 locks the logic loop into the normally closed position nodes of the isolation switch Q11 and the isolation switch Q12.
Further, the latching logic loop of the grounding switch Q121 is:
the grounding switch Q121 locks a logic loop into a normally closed position node of the isolating switch Q11 and the isolating switch Q12.
Further, the latching logic loop of the bypass isolation switch Q13 is:
the bypass isolation switch Q13 locks the normally closed position nodes of the logic loop series-in ground switch Q111, the ground switch Q122, the series-in switch G12, the switch G13, the ground switch G23, the isolation switch Q11 and the isolation switch Q12.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a 750kV circuit installs blocking logic circuit of current-limiting reactor wiring additional, according to the requirement of five protections of electric power system, consider the circuit simultaneously and take the anti operation of cluster to change to the circuit and do not take the anti operation of cluster, change to the safe operation of the anti operating mode in-process switch of cluster in the circuit again, and take the anti operation sequence of stopping transport of running the circuit of cluster, power transmission operation sequence, combine the dispatch not as the requirement such as circuit ground connection switch to the anti side earthing sword of cluster when the circuit overhauls, five protections blocking logic circuit under the wiring form of 750kV circuit installation current-limiting reactor additional, power equipment safe operation and personal safety have been guaranteed.
Drawings
FIG. 1 is a circuit diagram of a 750kV line with a current-limiting reactor;
fig. 2 is a latching logic circuit diagram of the isolation switch Q11 of the present invention;
fig. 3 is a specific electrical wiring diagram of the isolation switch Q11 of the present invention;
fig. 4 is a latching logic circuit diagram of the isolation switch Q12 of the present invention;
FIG. 5 is a detailed electrical wiring diagram of the isolation switch Q12;
FIG. 6 is a latching logic circuit diagram of the grounding switch Q111;
fig. 7 is a specific electrical wiring diagram of the grounding switch Q111;
fig. 8 is a latching logic circuit diagram of the ground switch Q122;
fig. 9 is a specific electrical wiring diagram of the grounding switch Q122;
fig. 10 is a latching logic circuit diagram of the ground switch Q112;
fig. 11 is a specific electrical wiring diagram of the grounding switch Q112;
fig. 12 is a latching logic circuit diagram of the ground switch Q121;
fig. 13 is a specific electrical wiring diagram of the ground switch Q121;
FIG. 14 is a latching logic circuit diagram of the bypass isolation switch Q13;
FIG. 15 is a detailed electrical wiring diagram of the bypass isolation switch Q13;
fig. 16 is a logic circuit diagram of the locking of the original equipment grounding switch G23, the switch G12 and the switch G13.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A group of current-limiting reactors are arranged at the outlet of a 750kV line, two sides of each current-limiting reactor device are connected into the line in series through 1 group of isolating switches, and meanwhile, 1 group of bypass isolating switches are arranged on the series reactor. The utility model aims at providing a specific wiring implementation scheme of shutting logic under 750kV circuit installs current-limiting reactor's wiring form additional to avoid the emergence of all kinds of maloperation accidents.
In the design of a five-prevention lockout logic loop, according to the five-prevention requirement of a power system, the safe operation of a disconnecting link when a circuit with series reactance operates until the circuit does not operate with series reactance, and then the safe operation of the disconnecting link in the working condition process of the circuit with series reactance operates, the shutdown operation sequence and the power transmission operation sequence of the circuit with series reactance operate need to be considered at the same time, and the implementation scheme of the five-prevention lockout logic under the wiring mode that a 750kV circuit is additionally provided with a current-limiting reactor is provided in combination with the requirement that a series reactance side grounding cutter is not used as a circuit grounding disconnecting link when the circuit is overhauled, so that the safe operation and the personal safety of power equipment.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, fig. 1 is a circuit diagram of an 750kV line additionally provided with a current-limiting reactor, in order to effectively limit a 750kV bus short-circuit current, the 750kV line is additionally provided with a current-limiting reactor, two sides of each group of current-limiting reactor are respectively connected in series into the line through 1 group of isolating switch Q11 and isolating switch Q12, two sides of an isolating switch Q11 are respectively provided with a grounding switch Q111 and a grounding switch Q112, two sides of an isolating switch Q12 are respectively provided with a grounding switch Q121 and a grounding switch Q122, and meanwhile, 1 group of bypass isolating switches Q13 are arranged on the series reactor; the 750kV in-string circuit breaker interval realizes the disconnection and connection of different outputs through a series of switches, in fig. 1, the input of the side current limiting resistor is controlled through a switch G12 and a switch G13, and the input end of the side current limiting resistor is also provided with a grounding switch G23.
The main electrical connection wire meets the five-prevention requirement of the power system, and also considers the switching mode of the current-limiting reactor and the special requirement of scheduling on the grounding disconnecting link in the locking logic loop between the electrical equipment in the series reactance region and the electrical equipment in the original circuit interval so as to ensure the safe operation of the power equipment when the operation personnel operate and avoid various misoperation accidents.
Referring to fig. 2, fig. 2 is a latching logic circuit of the isolation switch Q11, when the ground switch Q111, the ground switch Q112, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13 are all in the open position, the isolation switch Q11 allows for local operation. Referring to fig. 3, fig. 3 is a specific electrical wiring diagram of the isolation switch Q11, the isolation switch Q11 locks the logic loop into the normally closed position nodes of the ground switch Q111, the ground switch Q112, the in-string switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13. Through the locking logic circuit, the five-prevention requirement of the power system is met, and the requirement that the series reactance is switched on and off under the condition that the power is cut off at intervals is met.
Referring to fig. 4, fig. 4 is a latching logic circuit of the isolation switch Q12, when the ground switch Q121, the ground switch Q122, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13 are all in the open position, the isolation switch Q12 allows for in-situ operation. Referring to fig. 5, fig. 5 is a specific electrical wiring diagram of the isolation switch Q12, the isolation switch Q12 locks the logic loop into the normally closed position nodes of the ground switch Q121, the ground switch Q122, the in-series switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13. The above locking logic circuit not only considers the interlocking relationship between the grounding switch Q121 and the grounding switch Q122 nearby, but also considers the interlocking relationship between the switch G12, the switch G13 and the switch G23 at intervals in the string and the interlocking relationship between the series reactance bypass isolating switch Q13, thereby meeting the five-prevention requirement of the power system and meeting the requirement performed under the condition of line interval power failure during the switching on and off of the series reactance.
Referring to fig. 6, fig. 6 is a latching logic circuit of the grounding switch Q111, when the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13 are all in the separated position, the grounding switch Q111 is allowed to operate locally. Referring to fig. 7, fig. 7 is a specific electrical wiring diagram of the grounding switch Q111, and the grounding switch Q111 locks a logic loop into the normally closed position nodes of the isolation switch Q11, the isolation switch Q13, and the in-string switch G12, the switch G13. The locking logic circuit meets the five-prevention requirement of the power system.
Referring to fig. 8, fig. 8 is a latching logic circuit for ground switch Q122, with isolation switch Q12 in the open position, bypass isolation switch Q13 in the closed position, and line PT showing no voltage, ground switch Q122 allows for in-place operation. Referring to fig. 9, fig. 9 is a detailed electrical wiring diagram of ground switch Q122, with ground switch Q122 electrically latching the normally closed position node of isolation switch Q12 and bypassing the normally open position node of isolation switch Q13 and PT electrically latching the nodes. The interlocking logic loop not only considers the interlocking relation between the isolating switch Q12 nearby, but also judges whether the opposite side of the circuit is electrified or not through the node connected into the bypass isolating switch Q13 and the electrified interlocking node of the circuit PT on the side, so that the five-prevention requirement of a power system is met, and the condition that the grounding switch is electrified is avoided.
Referring to fig. 10, fig. 10 is a latching logic circuit of the ground switch Q112, with the isolation switch Q11 in the disengaged position and the isolation switch Q12 in the disengaged position, the ground switch Q112 allowing for in-situ operation. Referring to fig. 11, fig. 11 is a specific electrical wiring diagram of the grounding switch Q112, and the grounding switch Q112 locks a logic loop into the normally closed position nodes of the isolation switch Q11 and the isolation switch Q12. The interlocking logic loop of the grounding switch Q112 considers the interlocking relationship between the nearby isolating switch Q11 and the isolating switch Q12, and meets the five-prevention requirement of the power system.
Referring to fig. 12, fig. 12 is a latching logic circuit of the grounding switch Q121, and the grounding switch Q121 is allowed to operate in place when the isolation switches Q11 and Q12 are in the open position. Referring to fig. 13, fig. 13 is a specific electrical wiring diagram of the grounding switch Q121, and the grounding switch Q121 locks a logic loop into the normally closed position nodes of the isolation switch Q11 and the isolation switch Q12. The interlocking logic loop of the grounding switch Q121 considers the interlocking relationship between the nearby isolating switch Q11 and the isolating switch Q12, and meets the five-prevention requirement of the power system.
Referring to fig. 14, fig. 14 is a latching logic circuit of the bypass isolation switch Q13, and the bypass isolation switch Q13 allows in-situ operation when the ground switch Q111, the ground switch Q122, the switch G12, the switch G13, the ground switch G23, the isolation switch Q11 and the isolation switch Q12 are in the tap position. Referring to fig. 15, fig. 15 is a specific electrical wiring diagram of the bypass isolation switch Q13, the bypass isolation switch Q13 locks the normally closed position nodes of the logic loop series-connected grounding switch Q111, grounding switch Q122, series-connected switch G12, switch G13, grounding switch G23, series-connected reactance isolation switch Q11 and isolation switch Q12. The interlocking logic loop considers the interlocking relationship between the grounding switch Q111 and the grounding switch Q122 close to the bypass isolating switch Q13, the interlocking relationship between the switch G12, the switch G13 and the grounding switch G23 at intervals in a string, and the interlocking relationship between the isolating switch Q11 and the isolating switch Q12 at intervals in a string reactance, so that the five-prevention requirement of a power system is met, and the requirement in the case of line interval power failure during the switching-in and switching-out of the string reactance is met.
Referring to fig. 16, fig. 16 shows a closed logic loop of an original device switch G23, a switch G12, and a switch G13, a portion of an original closed loop is added after a current-limiting reactor is added to a 750kV line, a normally closed position contact of a bypass isolation switch Q13 is added to the closed loop of the switch G23, a normally closed position contact of a grounding switch Q111 and a grounding switch Q122 is added to the closed loop of a switch G12, and a normally closed position contact of the grounding switch Q111 and the grounding switch Q122 is added to the closed loop of the switch G13, so that the five-protection requirement of the power system is met.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (8)
- The circuit is characterized in that the 750kV circuit is additionally provided with a current-limiting reactor, two sides of each group of current-limiting reactors are respectively connected into the circuit in series through 1 group of isolating switches Q11 and Q12, and each group of series reactors is provided with 1 group of bypass isolating switches Q13;two sides of the isolating switch Q11 are respectively provided with an earthing switch Q111 and an earthing switch Q112, and two sides of the isolating switch Q12 are respectively provided with an earthing switch Q121 and an earthing switch Q122;a switch G12 and a switch G13 are arranged at intervals of the 750kV in-string circuit breaker to control the input of the current-limiting impedor, and the input end of the current-limiting impedor is also provided with a grounding switch G23;the latching logic loop of the isolating switch Q11 is:when the grounding switch Q111, the grounding switch Q112, the switch G12, the switch G13, the grounding switch G23 and the bypass isolating switch Q13 are in the separated position, the isolating switch Q11 can be operated in place;the latching logic loop of the isolating switch Q12 is:when the grounding switch Q121, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G2 and the bypass isolating switch Q13 are in the separated position, the isolating switch Q12 can be operated in place;the latching logic of the grounding switch Q111 is:when the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13 are in the separated position, the grounding switch Q111 can be operated in place;the latching logic for ground switch Q122 is:when the isolation switch Q12 is in the open position, the bypass isolation switch Q13 is in the closed position, and the line PT shows no voltage, the grounding switch Q122 can be operated in place;the latching logic for the ground switch Q112 is:when the isolating switch Q11 and the isolating switch Q12 are in the separated position, the grounding switch Q112 can be operated in place;the latching logic of the grounding switch Q121 is:when the isolating switch Q11 and the isolating switch Q12 are in the separated position, the grounding switch Q121 can be operated in place;the latching logic loop for the bypass isolation switch Q13 is:when the grounding switch Q111, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G23, the isolation switch Q11 and the isolation switch Q12 are in the separated position, the bypass isolation switch Q13 can be operated in place.
- 2. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of the isolating switch Q11 is:the isolation switch Q11 latches the logic loop into the normally closed position nodes of the ground switch Q111, the ground switch Q112, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13.
- 3. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of the isolating switch Q12 is:the isolation switch Q12 latches the logic loop into the normally closed position nodes of the ground switch Q121, the ground switch Q122, the switch G12, the switch G13, the ground switch G23, and the bypass isolation switch Q13.
- 4. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of the grounding switch Q111 is:the grounding switch Q111 locks a logic loop and is connected in series with the normally closed position nodes of the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13.
- 5. The latching logic circuit of 750kV line plus current-limiting reactor wiring of claim 1, characterized in that the latching logic circuit of the grounding switch Q122 is:the ground switch Q122 latches the logic loop into the normally closed position node of the isolation switch Q12, the normally open position node of the bypass isolation switch Q13, and the PT live latch node.
- 6. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of the grounding switch Q112 is:the grounding switch Q112 locks the logic loop into the normally closed position nodes of the isolation switch Q11 and the isolation switch Q12.
- 7. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of the grounding switch Q121 is:the grounding switch Q121 locks a logic loop into a normally closed position node of the isolating switch Q11 and the isolating switch Q12.
- 8. The latching logic circuit of 750kV line with current-limiting reactor wiring according to claim 1, characterized in that the latching logic circuit of bypass isolation switch Q13 is:the bypass isolation switch Q13 locks the normally closed position nodes of the logic loop series-in ground switch Q111, the ground switch Q122, the series-in switch G12, the switch G13, the ground switch G23, the isolation switch Q11 and the isolation switch Q12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022457319.0U CN213400931U (en) | 2020-10-29 | 2020-10-29 | Locking logic loop of 750kV line additionally provided with current-limiting reactor wiring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022457319.0U CN213400931U (en) | 2020-10-29 | 2020-10-29 | Locking logic loop of 750kV line additionally provided with current-limiting reactor wiring |
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| CN213400931U true CN213400931U (en) | 2021-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113641122A (en) * | 2021-08-06 | 2021-11-12 | 广西电网有限责任公司电力科学研究院 | Interlocking logic visualization method and device for intelligent high-voltage switch |
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2020
- 2020-10-29 CN CN202022457319.0U patent/CN213400931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113641122A (en) * | 2021-08-06 | 2021-11-12 | 广西电网有限责任公司电力科学研究院 | Interlocking logic visualization method and device for intelligent high-voltage switch |
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