CN112201503B - Locking logic loop for connecting 750kV line with current-limiting reactor - Google Patents
Locking logic loop for connecting 750kV line with current-limiting reactor Download PDFInfo
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- CN112201503B CN112201503B CN202011183165.9A CN202011183165A CN112201503B CN 112201503 B CN112201503 B CN 112201503B CN 202011183165 A CN202011183165 A CN 202011183165A CN 112201503 B CN112201503 B CN 112201503B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a locking logic loop for a 750kV line additionally provided with a current limiting reactor wiring, and belongs to the field of power systems. According to the locking logic loop for the connection of the 750kV line additionally arranged current limiting reactor, according to the five-prevention requirement of a power system, the safety operation of a disconnecting link is considered in the process that the line with the series resistance is switched to the line without the series resistance and then switched to the working condition of the line with the series resistance, the shutdown operation sequence and the power transmission operation sequence of the line with the series resistance are combined, the requirement that the line grounding disconnecting link is not used as a line grounding disconnecting link when the line is overhauled by scheduling is combined, and the five-prevention locking logic loop under the connection mode of the 750kV line additionally arranged current limiting reactor is provided, so that the safety operation and the personal safety of power equipment are ensured.
Description
Technical Field
The invention belongs to the field of power systems, and particularly relates to a locking logic loop for a 750kV line with a current-limiting reactor wiring.
Background
The locking logic of the early 500kV line additionally installed current limiting reactor engineering is realized through the background internal setting logic of the computer monitoring system, and no external electric interlocking loop wiring exists. The safety reliability is low for high voltage class locked logic loops.
In order to effectively limit the interval short-circuit current of the circuit breaker in the 750kV string, a current limiting reactor is additionally arranged on a 750kV line. New embodiments need to be proposed to ensure safe operation of the power equipment and personal safety.
Disclosure of Invention
The invention aims to solve the problem of operation safety of related equipment after a 750kV line is additionally provided with a current-limiting reactor, and provides a locking logic loop for the connection of the 750kV line and the current-limiting reactor.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
A locking logic loop for connecting a 750kV line with a current-limiting reactor, wherein the 750kV line is provided with current-limiting reactors, two sides of each group of current-limiting reactors are respectively connected into the line 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;
The two sides of the isolating switch Q11 are respectively provided with a grounding switch Q111 and a grounding switch Q112, and the two sides of the isolating switch Q12 are respectively provided with a grounding switch Q121 and a grounding switch Q122;
A switch G12 and a switch G13 are arranged on the interval of the 750kV in-string circuit breaker to control the input of a current limiting resistor, and a grounding switch G23 is also arranged at the input end of the current limiting resistor;
The blocking logic loop of the isolating switch Q11 is as follows:
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 all in separated positions, and the isolating switch Q11 can be operated in situ;
the blocking logic loop of the isolating switch Q12 is as follows:
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 all in separated positions, and the isolating switch Q12 can be operated in situ;
the latching logic of the ground switch Q111 is:
The isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13 are all in separated positions, and the grounding switch Q111 can be operated in situ;
the latching logic of the ground switch Q122 is:
When the isolating switch Q12 is in the split position, the bypass isolating switch Q13 is in the closed position and the line PT shows no voltage, the grounding switch Q122 can be operated in situ;
the latching logic of 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 situ;
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 situ;
the latching logic loop of the bypass isolation switch Q13 is:
The bypass isolation switch Q13 can be operated in situ 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 all in the split position.
Further, the blocking logic loop of the isolating switch Q11 is:
The isolation switch Q11 is locked into a logic loop string and is connected with normally closed position nodes of the grounding switch Q111, the grounding switch Q112, the switch G12, the switch G13, the grounding switch G23 and the bypass isolation switch Q13.
Further, the blocking logic loop of the isolating switch Q12 is:
The isolation switch Q12 is locked into a logic loop string and is connected with normally closed position nodes of the grounding switch Q121, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G23 and the bypass isolation switch Q13.
Further, the latch logic loop of the grounding switch Q111 is:
The grounding switch Q111 is locked in a logic loop string and is connected with normally closed position nodes of the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13.
Further, the latch logic circuit of the grounding switch Q122 is:
The grounding switch Q122 locks the logic loop string into the normally closed position node of the isolating switch Q12, the normally open position node of the bypass isolating switch Q13 and the PT electrically locking node.
Further, the latch logic loop of the grounding switch Q112 is:
the grounding switch Q112 locks the normally closed position nodes of the logic loop strings of the isolating switch Q11 and the isolating switch Q12.
Further, the latch logic circuit of the grounding switch Q121 is:
The grounding switch Q121 locks the normally closed position nodes of the logic loop strings of the isolating switch Q11 and the isolating switch Q12.
Further, the latching logic circuit of the bypass isolation switch Q13 is:
the bypass isolating switch Q13 is locked into a normally closed position node of the logic loop string of the grounding switch Q111, the grounding switch Q122, the in-string switch G12, the switch G13, the grounding switch G23, the isolating switch Q11 and the isolating switch Q12.
Compared with the prior art, the invention has the following beneficial effects:
according to the locking logic loop for the connection of the 750kV line additionally arranged current limiting reactor, according to the five-prevention requirement of a power system, the safety operation of a disconnecting link is considered in the process that the line with the series resistance is switched to the line without the series resistance and then switched to the working condition of the line with the series resistance, the shutdown operation sequence and the power transmission operation sequence of the line with the series resistance are combined, the requirement that the line grounding disconnecting link is not used as a line grounding disconnecting link when the line is overhauled by scheduling is combined, and the five-prevention locking logic loop under the connection mode of the 750kV line additionally arranged current limiting reactor is provided, so that the safety operation and the personal safety of power equipment are ensured.
Drawings
FIG. 1 is a circuit diagram of a 750kV line with a current limiting reactor added;
FIG. 2 is a schematic diagram of the latch logic of the isolating switch Q11 according to the present invention;
FIG. 3 is a specific electrical wiring diagram of the isolating switch Q11 of the present invention;
FIG. 4 is a schematic diagram of the latching logic of the isolation switch Q12 of the present invention;
FIG. 5 is a specific electrical wiring diagram of the isolation switch Q12;
FIG. 6 is a latch logic circuit diagram of the ground switch Q111;
FIG. 7 is a specific electrical wiring diagram of the ground switch Q111;
FIG. 8 is a latch logic circuit diagram of the ground switch Q122;
FIG. 9 is a specific electrical wiring diagram of the ground switch Q122;
FIG. 10 is a latch logic circuit diagram of the ground switch Q112;
FIG. 11 is a specific electrical wiring diagram of the ground switch Q112;
FIG. 12 is a latch 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 bypass isolation switch Q13;
FIG. 15 is a specific electrical wiring diagram of the bypass isolation switch Q13;
Fig. 16 is a diagram showing the logic circuit of the original equipment ground switch G23, switch G12 and switch G13.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented 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 the current-limiting reactor device are respectively connected into the line in series through 1 group of isolating switches, and 1 group of bypass isolating switches are arranged on the series reactors. The invention aims to provide a specific wiring implementation scheme of locking logic in a wiring mode of additionally installing a current limiting reactor on a 750kV line so as to avoid various misoperation accidents.
In the design of the five-prevention locking logic loop, according to the five-prevention requirement of a power system, the safety operation of a disconnecting link in the process of converting the line string anti-operation to the line without string anti-operation and then converting the line string anti-operation to the line string anti-operation working condition, the shutdown operation sequence and the power transmission operation sequence of the line with string anti-operation, and the requirement of scheduling the line maintenance of a grounding knife on the string anti-grounding side not serving as a line grounding disconnecting link and the like are simultaneously considered, and the implementation scheme of the five-prevention locking logic in the wiring mode of additionally installing a current-limiting reactor on a 750kV line is provided, so that the safety operation and personal safety of power equipment are ensured.
The invention is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, fig. 1 is a circuit diagram of a 750kV line with a current limiting reactor, in order to effectively limit short-circuit current of a 750kV bus, the 750kV line is additionally provided with the current limiting reactor, two sides of each group of current limiting reactors are respectively connected into the line in series through 1 group of isolating switches Q11 and Q12, two sides of each isolating switch Q11 are respectively provided with a grounding switch Q111 and a grounding switch Q112, two sides of each 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 reactors; the circuit breaker interval in 750kV series realizes disconnection and connection of different outputs through a series of switches, in fig. 1, the input of the side limiting resistor is controlled through a switch G12 and a switch G13, and the input end of the side limiting resistor is also provided with a grounding switch G23.
The electric main wiring meets the five-prevention requirement of the electric system, and the switching mode of the current limiting reactor and the special requirement of dispatching the grounding disconnecting link are considered in a locking logic loop between the electric equipment in the series reactance area and the electric equipment in the original line interval, so that the safe operation of the electric equipment is ensured when an operator operates, and various misoperation accidents are avoided.
Referring to fig. 2, fig. 2 shows a closed logic circuit of the isolation switch Q11, where the isolation switch Q11 allows in-situ operation 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 separated position. Referring to fig. 3, fig. 3 is a specific electrical wiring diagram of the isolation switch Q11, where the isolation switch Q11 is locked to the normally closed position nodes of the logic loop string ground switch Q111, ground switch Q112, in-string switch G12, switch G13, ground switch G23, and bypass isolation switch Q13. Through the locking logic loop, the five-prevention requirement of the power system is met, and the situation that the line interval is powered off when the string resistance is switched back is met.
Referring to fig. 4, fig. 4 shows a closed logic circuit of the isolation switch Q12, where the isolation switch Q12 allows in-situ operation 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 split state. Referring to fig. 5, fig. 5 is a specific electrical wiring diagram of the isolation switch Q12, where the isolation switch Q12 blocks the normally closed position nodes of the logic loop string into the grounding switch Q121, the grounding switch Q122, the in-string switch G12, the switch G13, the grounding switch G23, and the bypass isolation switch Q13. The locking logic loop considers the interlocking relation between the grounding switch Q121 and the grounding switch Q122 nearby, and also considers the interlocking relation among the switches G12, G13 and G23 which are spaced in the string and among the string-resistance bypass isolating switches Q13, thereby meeting the five-prevention requirement of the power system and meeting the requirement of the string-resistance switching under the condition of line interval power failure.
Referring to fig. 6, fig. 6 is a closed logic loop of the grounding switch Q111, where the grounding switch Q111 allows in-situ operation when the isolating switch Q11, the isolating switch Q13, the switch G12, and the switch G13 are all in the separated position. Referring to fig. 7, fig. 7 is a specific electrical wiring diagram of the grounding switch Q111, where the grounding switch Q111 latches a normally closed position node of the logic loop string into the disconnector Q11, disconnector Q13, and the in-string switches G12, G13. The locking logic loop meets the five-prevention requirement of the electric power system.
Referring to fig. 8, fig. 8 shows a closed logic circuit of the grounding switch Q122, the isolating switch Q12 is in the split position, the bypass isolating switch Q13 is in the closed position, and the line PT shows no voltage, the grounding switch Q122 is allowed to operate in situ. Referring to fig. 9, fig. 9 is a specific electrical wiring diagram of the grounding switch Q122, where the grounding switch Q122 latches a normally closed position node of the logic loop string into the isolating switch Q12 and normally open position nodes and PT of the bypass isolating switch Q13 with electrical latching nodes. The locking logic loop considers the interlocking relation between the adjacent isolating switch Q12, judges that the opposite side of the line is not electrified through the node of the bypass isolating switch Q13 and the electrified locking node of the line PT, meets the five-prevention requirement of the power system, and also aims to avoid the electrified grounding knife.
Referring to fig. 10, fig. 10 shows a closed logic circuit of the grounding switch Q112, where the isolating switch Q11 is in the split position and the isolating switch Q12 is in the split position, the grounding switch Q112 allows for in-situ operation. Referring to fig. 11, fig. 11 is a specific electrical wiring diagram of the grounding switch Q112, where the grounding switch Q112 latches a normally closed position node of the logic loop string into the isolating switch Q11 and the isolating switch Q12. The locking logic loop of the grounding switch Q112 considers the interlocking relation between the grounding switch Q112 and the nearby isolating switch Q11 and the nearby isolating switch Q12, and meets the five-prevention requirement of the power system.
Referring to fig. 12, fig. 12 shows a closed logic circuit of the grounding switch Q121, and the grounding switch Q121 allows in-situ operation when the isolating switches Q11 and Q12 are in the separated position. Referring to fig. 13, fig. 13 is a specific electrical wiring diagram of the grounding switch Q121, where the grounding switch Q121 latches a normally closed position node of the logic loop string into the isolating switch Q11 and the isolating switch Q12. The locking logic loop of the grounding switch Q121 considers the interlocking relation between the grounding switch Q121 and the nearby isolating switch Q11 and the nearby isolating switch Q12, and meets the five-prevention requirement of the power system.
Referring to fig. 14, fig. 14 shows a closed logic circuit of the bypass isolation switch Q13, where 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 all in the separated state, and the bypass isolation switch Q13 allows in-situ operation. Referring to fig. 15, fig. 15 is a specific electrical wiring diagram of a bypass isolation switch Q13, where the bypass isolation switch Q13 latches a logic loop string into the grounding switch Q111 and the grounding switch Q122, and the in-string switches G12, G13, G23 and normally closed position nodes of the string isolation switches Q11 and Q12. The locking logic loop considers the interlocking relation between the grounding switch Q111 and the grounding switch Q122 which are close to the bypass isolating switch Q13, the interlocking relation among the switches G12, G13 and G23 which are spaced in the string and the interlocking relation among the isolating switches Q11 and Q12 which are spaced in the string, thereby meeting the five-prevention requirement of the power system and meeting the requirement of the string in the case of power failure at the line interval when the string is in the process of switching.
Referring to fig. 16, fig. 16 shows a conventional device switch G23, a switch G12, and a switch G13 for blocking a logic loop, wherein a portion of the conventional blocking loop is added after a current limiting reactor is additionally arranged in a virtual frame for a 750kV line, the blocking loop of the switch G23 is added with a normally closed position contact of a serial-in bypass isolating switch Q13, the blocking loop of the switch G12 is added with a normally closed position contact of a serial-in grounding switch Q111 and a grounding switch Q122, and the blocking loop of the switch G13 is added with a normally closed position contact of a serial-in grounding switch Q111 and a grounding switch Q122, so as to meet the five-prevention requirement of a power system.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A locking logic loop for 750kV line added current-limiting reactor wiring is characterized in that 750kV line added current-limiting reactors, two sides of each group of current-limiting reactors are respectively connected into the line 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;
The two sides of the isolating switch Q11 are respectively provided with a grounding switch Q111 and a grounding switch Q112, and the two sides of the isolating switch Q12 are respectively provided with a grounding switch Q121 and a grounding switch Q122;
750 A switch G12 and a switch G13 are arranged on the interval of the breaker in the kV string to control the input of a current limiting resistor, and a grounding switch G23 is also arranged at the input end of the current limiting resistor;
The blocking logic loop of the isolating switch Q11 is as follows:
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 all in separated positions, and the isolating switch Q11 can be operated in situ;
the blocking logic loop of the isolating switch Q12 is as follows:
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 all in separated positions, and the isolating switch Q12 can be operated in situ;
the latching logic of the ground switch Q111 is:
The isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13 are all in separated positions, and the grounding switch Q111 can be operated in situ;
the latching logic of the ground switch Q122 is:
When the isolating switch Q12 is in the split position, the bypass isolating switch Q13 is in the closed position and the line PT shows no voltage, the grounding switch Q122 can be operated in situ;
the latching logic of 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 situ;
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 situ;
the latching logic loop of the bypass isolation switch Q13 is:
the bypass isolating switch Q13 can be operated in situ when the grounding switch Q111, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G23, the isolating switch Q11 and the isolating switch Q12 are all in the separated position;
the blocking logic loop of the isolating switch Q12 is as follows:
The isolation switch Q12 is locked in a logic loop and is connected in series with normally closed position nodes of the grounding switch Q121, the grounding switch Q122, the switch G12, the switch G13, the grounding switch G23 and the bypass isolation switch Q13;
the latching logic of the ground switch Q122 is:
The grounding switch Q122 locks the logic loop string into the normally closed position node of the isolating switch Q12, the normally open position node of the bypass isolating switch Q13 and the PT electrically locking node.
2. The latching logic circuit for 750kV line-added current-limiting reactor wiring of claim 1, wherein the latching logic circuit of the isolation switch Q11 is:
The isolation switch Q11 is locked into a logic loop string and is connected with normally closed position nodes of the grounding switch Q111, the grounding switch Q112, the switch G12, the switch G13, the grounding switch G23 and the bypass isolation switch Q13.
3. The latching logic circuit for 750kV line-added current-limiting reactor wiring of claim 1, wherein the latching logic circuit of the ground switch Q111 is:
The grounding switch Q111 is locked in a logic loop string and is connected with normally closed position nodes of the isolating switch Q11, the isolating switch Q13, the switch G12 and the switch G13.
4. The latching logic circuit for 750kV line-added current-limiting reactor wiring as defined in claim 1, wherein the latching logic circuit of the ground switch Q112 is:
the grounding switch Q112 locks the normally closed position nodes of the logic loop strings of the isolating switch Q11 and the isolating switch Q12.
5. The latching logic circuit for 750kV line-added current-limiting reactor wiring of claim 1, wherein the latching logic circuit of the ground switch Q121 is:
The grounding switch Q121 locks the normally closed position nodes of the logic loop strings of the isolating switch Q11 and the isolating switch Q12.
6. The latching logic circuit for 750kV line-added current-limiting reactor wiring of claim 1, wherein the latching logic circuit for bypass isolation switch Q13 is:
the bypass isolating switch Q13 is locked into a normally closed position node of the logic loop string of the grounding switch Q111, the grounding switch Q122, the in-string switch G12, the switch G13, the grounding switch G23, the isolating switch Q11 and the isolating switch Q12.
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| CN202011183165.9A CN112201503B (en) | 2020-10-29 | 2020-10-29 | Locking logic loop for connecting 750kV line with current-limiting reactor |
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| CN202011183165.9A CN112201503B (en) | 2020-10-29 | 2020-10-29 | Locking logic loop for connecting 750kV line with current-limiting reactor |
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| CN112201503B true CN112201503B (en) | 2024-07-05 |
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| CN202150378U (en) * | 2011-08-17 | 2012-02-22 | 太平湾发电厂 | Isolation switch electric anti-maloperation locking control system |
| CN107947173B (en) * | 2017-12-20 | 2024-02-02 | 南京南瑞继保电气有限公司 | A series compensator and control method |
| CN207819446U (en) * | 2018-01-10 | 2018-09-04 | 内蒙古电力勘测设计院有限责任公司 | A kind of five anti-loop control systems for hybrid gas insulation switchgear |
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| CN213400931U (en) * | 2020-10-29 | 2021-06-08 | 中国电力工程顾问集团西北电力设计院有限公司 | Locking logic loop of 750kV line additionally provided with current-limiting reactor wiring |
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