CN202749782U - Transmission line ice melting system implemented by switching operation in whole process - Google Patents
Transmission line ice melting system implemented by switching operation in whole process Download PDFInfo
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- CN202749782U CN202749782U CN 201220243034 CN201220243034U CN202749782U CN 202749782 U CN202749782 U CN 202749782U CN 201220243034 CN201220243034 CN 201220243034 CN 201220243034 U CN201220243034 U CN 201220243034U CN 202749782 U CN202749782 U CN 202749782U
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- 238000010257 thawing Methods 0.000 claims description 3
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Abstract
The utility model relates to a transmission line ice-melt system that overall process utilized switching operation to implement, including direct current ice-melt device, conversion switch, with ice-melt line connection's ice-melt access switch and ice-melt short circuit switch, connecting wire and gold utensil. When the direct-current short-circuit ice melting is realized on the electric transmission line, the ice melting line is connected with the ice melting bus through the ice melting access disconnecting link in the substation where the direct-current ice melting device is located, the three-phase short circuit of the line is realized in the substation on the opposite side of the line through the ice melting short-circuit disconnecting link, so that the electric transmission line enters an ice melting state. The scheme can be used for completing the operation process only through switching operation without changing the line into a maintenance state during ice melting. The defects of long line shutdown time, low reliability, threat to the personal safety of wiring workers and the like caused by manual field operation are overcome.
Description
Technical field
The utility model patent has related to the transmission line ice melting system that overall process utilizes grid switching operation to implement, and belongs to the innovative technology that the power transmission network power line DC ice-melting is used.
Background technology
The powerline ice-covering that low temperature sleet and snow ice weather causes is one of serious threat of facing of system of numerous State Grid, and serious icing can cause the electrical network broken string, fall tower, causes large area blackout, also so that fast quick-recovery send electricity to become very difficult.For a long time, the threat of ice damage is the large technical barrier that the electric power system industrial quarters does one's utmost to tackle always.
North America storm in 1998 has powered up guipure to U.S.A and has seriously influenced, and has caused the power breakdown of wide scope.2005, low temperature sleet and snow ice weather caused serious disaster once for Chinese Central China, North China Power Telecommunication Network.In January, 2008 is to February, low temperature sleet and snow ice weather attacks southern china, Central China, East China again, cause Guizhou, Hunan, Guangdong, Yunnan, Guangxi and Jiangxi etc. to economize transmission line large tracts of land, the long-time stoppage in transit, bring about great losses for national economy and people's lives.
The former Soviet Union brought into use the ice-melt of diode rectification device from 1972, adopted afterwards silicon controlled rectifier.Russia direct current research institute has successfully developed the silicon controlled rectifier deicing device of 2 electric pressures: 14kV(is powered by 11 kV ac bus) and 50kV(powered by 38.5 kV ac bus).The rated power of 14kV device is 14MW, and the rated power of 50kV device is 50MW.50MW is installed on 1994 and puts into operation in transformer station, and is successfully applied to the deicing of the long 110kV transmission line of 315 km.Behind the North America ice damages in 1998, Quebec hydroelectric board and AREVA T﹠amp; D company drops into 2,500 ten thousand Euros, developed DC de-icing device cooperatively, and in the L of Quebec electrical network é vis transformer station one cover DC de-icing device, capacity 250 MW have been installed, VD ± 17.4 kV, purpose of design are that 4 735kV and 2 315kV circuits are carried out ice-melt.This device was finished field test in 2008, but did not carry out so far actual ice-melt.
Behind the ice damages in 2008, the China Power scientific worker has independently carried out the research and development of DC ice melting technology and device, successfully developed the high power DC deicing device with complete independent intellectual property right, mainly comprise the band special rectifier transformer, be not with the multiple patterns such as special rectifier transformer and vehicle-mounted removable, and then apply in the whole nation.Ice age in-2011 in 2009, the 19 cover DC de-icing devices of only having installed in the south electric network have all been brought into play significant role, the 110kV Above Transmission Lines is carried out DC ice melting amount to 234 times, wherein the 500kV alternating current circuit is more than 40 times, has given full play to the power of DC de-icing device.
From present DC de-icing device should be used for electrical network, being connected of the ice-melt bus of DC de-icing device DC side and DC ice-melting (or isolation), DC ice-melting short circuit (or isolation) is generally realized by manual type, when ice-melt, operator scene in the transformer station of deicing device place utilizes instrument and interim shorting stub with ice-melt pipe bus and connection, then treat DC ice-melting offside transformer station with circuit on request with the interim shorting stub short circuit of three-phase line utilization, circuit must be transferred to inspecting state in connection and the demolishing process just can carry out, because the circuit hanging point is often overhead higher, particularly for the 500kV circuit, circuit hanging point height is generally more than 20m, when manual operation, not only consuming time, and operation intensity and difficulty are very large.According to present 2009-211 practical experiences, artificial setting up time is greater than the actual ice-melt time of circuit, cause the line outage time to surpass more than the line ice-melting time twice, the time that finishing a 500kV line ice-melting needs surpasses 10 hours, and ice-melt efficient is had a strong impact on.The ice-melt bus of existing DC de-icing device DC side is connected and the artificial interim joint connection in site mode of DC ice-melting offside short circuit employing with DC ice-melting, exists the line outage time long, and is dangerous high, the shortcomings such as poor reliability.Therefore, the problem that must have better solution DC ice-melting to be connected and to isolate with DC de-icing device shortens connection and isolation time.Transmission line ice melting system and method thereof that overall process that the utility model proposes utilizes grid switching operation to implement can address this problem preferably, 500kV circuit total ice-melt time can be controlled in 4 hours.
Summary of the invention
The purpose of this utility model is the deficiency for existing direct current ice melting system and method, the transmission line ice melting system that provides overall process to utilize grid switching operation to implement, implementing does not need to transfer transmission line and DC de-icing device to inspecting state in the deicing processes, and this system does not need artificial patch in implementing the transmission line deicing processes.The facilities and equipment that the utility model need to be used comprise that mainly DC de-icing device, conversion disconnecting link, the ice-melt that is connected with DC ice-melting access disconnecting link and be connected connection wire and gold utensil with ice-melt short circuit disconnecting link.The utility model is reasonable in design, and is simple to operate, easy to use.
The technical solution of the utility model is: the transmission line ice melting system that overall process of the present utility model utilizes grid switching operation to implement, comprise DC de-icing device DI, DC side conversion disconnecting link S1, S2, S3 and S4, ice-melt bus DB, ice-melt access disconnecting link SA, need ice-thawing electric transmission line TL, ice-melt short circuit disconnecting link SC, and DC de-icing device DI with and the P of place transformer station station in the circuit breaker Q F that is connected of bus, isolation switch K, the circuit breaker Q FA that transmission line TL is connected with P station ac bus, isolation switch KA, transmission line TL and the Q of another transformer station circuit breaker Q FB that corresponding ac bus is connected that stands, isolation switch KB, link to each other with DC de-icing device DI negative pole behind the end short circuit of DC side conversion disconnecting link S1 and S2, link to each other with DC de-icing device DI positive pole behind DC side conversion disconnecting link S3 and the S4 one end short circuit; The DC side conversion disconnecting link S1 other end is connected with A among the ice-melt bus DB, is connected with B among the ice-melt bus DB behind DC side conversion disconnecting link S2 and the S3 other end short circuit, and DC side is changed the disconnecting link S4 other end and is connected with C among the ice-melt bus DB; The low-pressure side of ice-melt access disconnecting link SA is connected with ice-melt bus DB, and the high-pressure side of ice-melt access disconnecting link SA is connected with transmission line TL; The low-pressure side short circuit of ice-melt short circuit disconnecting link SC, the high-pressure side of ice-melt short circuit disconnecting link SC is connected with transmission line TL.
Above-mentioned transmission line TL is connected and isolates by ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC realization with DC de-icing device DI's.
Two bridge mid points were unique earth point of direct current ice melting system when above-mentioned DC de-icing device DI adopted two six fluctuation bridge cascaded structures, adopt single six fluctuation bridges or during with two six fluctuation bridge parallel-connection structures direct current ice melting system without earth point.
Above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt three single-post single-arm vertical retractable isolation switchs or single-column both arms vertical-telescopic isolation switch to consist of.
The low-pressure end short circuit of three vertical-telescopic disconnecting links among the above-mentioned ice-melt short circuit disconnecting link SC, the low-pressure end of three vertical-telescopic disconnecting links among the ice-melt access disconnecting link SA is short circuit not.
The vertical-telescopic disconnecting link that above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt comprises high pressure support porcelain insulator, low pressure support porcelain insulator, operation porcelain insulator, vertical opening type operator lock, fixed contact, moving contact, grading ring, high-voltage terminal daughter board, low voltage terminal daughter board, operator lock motor-operating mechanism; Described high pressure supports the top of porcelain insulator to be connected with the fixing conduction in the bottom surface of grading ring; Described high pressure supports the end face of porcelain insulator to be installed with the high-voltage terminal daughter board, and the bottom surface of grading ring also is installed with fixed contact, and connects for conduction between fixed contact, high-voltage terminal daughter board and the grading ring; Low pressure supports that porcelain insulator is contour with the operation porcelain vase, be parallel to each other and the upper end links to each other; Described low pressure supports the porcelain insulator top to be fixedly connected with described low voltage terminal daughter board and vertical opening type operator lock, be fixedly connected with for conducting electricity between low voltage terminal daughter board and the described vertical opening type operator lock lower end, vertical opening type is operated and is fixedly connected with for conducting electricity between lock top and the described moving contact; Be in transmission connection by the operation porcelain vase between operator lock motor-operating mechanism and the vertical opening type operator lock; Length after described vertical opening type operator lock stretches can make moving contact contact with fixed contact, described vertical opening type operate lock when not stretching moving contact and distance between the fixed contact to satisfy the insulation level of insulation level between moving contact and the fixed contact and the desired power switchgear fracture of DC ice-melting electric pressure identical.
The low pressure of above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC supports porcelain insulator identical with the insulation level of operation porcelain insulator, and high pressure supports the insulation level of porcelain insulator to support the insulation level of porcelain insulator and operation porcelain insulator far above low pressure.
The length of porcelain insulator of supporting above-mentioned high pressure satisfies high pressure and supports that the insulation level of porcelain insulator is identical with the desired insulation against ground level of DC ice-melting TL electric pressure; It is identical with the desired insulation against ground level of DC de-icing device ice-melt bus DB electric pressure that described low pressure supports that the length of porcelain insulator and operation porcelain insulator satisfies its insulation level.
The low voltage terminal daughter board of three vertical-telescopic disconnecting links among the above-mentioned ice-melt short circuit disconnecting link SC by connect busbar be connected with connection
Overall process utilizes transmission line ice melting system utility model that grid switching operation implements compared with prior art, has following features:
1) the utility model is easy to operate, need not artificial field connection, need not tool using, uses manpower and material resources sparingly the personal injury that may bring when having avoided simultaneously artificial wiring.
Line outage time when 2) the utility model shortens ice-melt greatly, the method in the utility model can be controlled at 500kV circuit total ice-melt time in 4 hours.Finish access and the disconnection of deicing device by grid switching operation action, circuit does not exist and turns the repair time, greatly improves ice-melt efficient.
3) the utility model reliability is high.Artificial patch may so that ice-melt can't be carried out smoothly, adopt this programme to realize automatically access because unreasonable operation causes connection reliability can not be guaranteed, and reliability improves.
4) capital equipment that uses of de-icing method of the present utility model is one group and is connected ice-melt with DC ice-melting and accesses disconnecting link and one group of ice-melt short circuit disconnecting link, adopt three single-post single-arm vertical retractable isolation switchs or single-column both arms vertical-telescopic isolation switch to realize, take up an area less, when the transformer station that has built up implements improvement project, generally need not to carry out new expropriation of land, possess preferably operational feasibility.
Description of drawings
The transmission line ice melting system schematic diagram that accompanying drawing 1 utilizes grid switching operation to implement for overall process;
Accompanying drawing 2 is single-post single-arm vertical retractable isolation switch front elevational schematic;
Accompanying drawing 3 is single-post single-arm vertical retractable isolation switch schematic side view;
Accompanying drawing 4 is single-column both arms vertical-telescopic isolation switch front view schematic diagram;
Accompanying drawing 5 is single-column both arms vertical-telescopic isolation switch end view schematic diagram;
Accompanying drawing 6 adopts three single-post single-arm vertical retractable isolation switch low-pressure side short circuit schematic diagrames for ice-melt short circuit disconnecting link;
Accompanying drawing 7 adopts three single-column both arms vertical-telescopic isolation switch low-pressure side short circuit schematic diagrames for ice-melt short circuit disconnecting link;
Accompanying drawing 8 utilizes the de-icing method schematic diagram of the transmission line ice melting system of grid switching operation enforcement for the utility model overall process.
Embodiment
The transmission line ice melting system that overall process of the present utility model utilizes grid switching operation to implement, comprise DC de-icing device DI, DC side conversion disconnecting link S1, S2, S3 and S4, ice-melt bus DB, ice-melt access disconnecting link SA, need ice-thawing electric transmission line TL, ice-melt short circuit disconnecting link SC, and DC de-icing device DI with and the P of place transformer station station in the circuit breaker Q F that is connected of bus, isolation switch K, the circuit breaker Q FA that transmission line TL is connected with P station ac bus, isolation switch KA, transmission line TL and the Q of another transformer station circuit breaker Q FB that corresponding ac bus is connected that stands, isolation switch KB, link to each other with DC de-icing device DI negative pole behind the end short circuit of DC side conversion disconnecting link S1 and S2, link to each other with DC de-icing device DI positive pole behind DC side conversion disconnecting link S3 and the S4 one end short circuit; The DC side conversion disconnecting link S1 other end is connected with A among the ice-melt bus DB, is connected with B among the ice-melt bus DB behind DC side conversion disconnecting link S2 and the S3 other end short circuit, and DC side is changed the disconnecting link S4 other end and is connected with C among the ice-melt bus DB; The low-pressure side of ice-melt access disconnecting link SA is connected with ice-melt bus DB, and the high-pressure side of ice-melt access disconnecting link SA is connected with transmission line TL; The low-pressure side short circuit of ice-melt short circuit disconnecting link SC, the high-pressure side of ice-melt short circuit disconnecting link SC is connected with transmission line TL.
Above-mentioned transmission line TL is connected and isolates by ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC realization with DC de-icing device DI's.
Two bridge mid points were unique earth point of direct current ice melting system when above-mentioned DC de-icing device DI adopted two six fluctuation bridge cascaded structures, adopt single six fluctuation bridges or during with two six fluctuation bridge parallel-connection structures direct current ice melting system without earth point.
Above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt three single-post single-arm vertical retractable isolation switchs or single-column both arms vertical-telescopic isolation switch to consist of.
The low-pressure end short circuit of three vertical-telescopic disconnecting links among the above-mentioned ice-melt short circuit disconnecting link SC, the low voltage terminal of three vertical-telescopic disconnecting links among the ice-melt access disconnecting link SA is short circuit not.
The vertical-telescopic disconnecting link that above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt comprises high pressure support porcelain insulator 1, low pressure support porcelain insulator 2, operation porcelain insulator 3, vertical opening type operator lock 4, fixed contact 5, moving contact 6, grading ring 7, high-voltage terminal daughter board 8, low voltage terminal daughter board 9, operator lock motor-operating mechanism 10; Described high pressure supports the top of porcelain insulator 1 to be connected with the fixing conduction in the bottom surface of grading ring 7; Described high pressure supports the end face of porcelain insulator 1 to be installed with high-voltage terminal daughter board 8, and the bottom surface of grading ring 7 also is installed with fixed contact 5, and connects for conduction between fixed contact 5, high-voltage terminal daughter board 8 and the grading ring 7; Low pressure supports that porcelain insulator 2 and operation porcelain vase are 3 contour, be parallel to each other and the upper end links to each other; Described low pressure supports porcelain insulator 2 tops to be fixedly connected with described low voltage terminal daughter board 9 and vertical opening type operator lock 4, be fixedly connected with for conducting electricity between low voltage terminal daughter board 9 and described vertical opening type operator lock 4 lower ends, vertical opening type is operated and is fixedly connected with for conducting electricity between lock 4 tops and the described moving contact 6; Be in transmission connection by operation porcelain vase 3 between operator lock motor-operating mechanism 10 and the vertical opening type operator lock 4; Length after described vertical opening type operator lock 4 stretches can make moving contact 6 contact with fixed contact 5, described vertical opening type operate lock 4 when not stretching moving contact 6 and distance between the fixed contact 5 to satisfy the insulation level of insulation level between moving contact 6 and the fixed contact 5 and the desired power switchgear fracture of DC ice-melting electric pressure identical.
The low pressure of above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC supports porcelain insulator 2 identical with the insulation level of operation porcelain insulator 3, and high pressure supports the insulation level of porcelain insulator 1 to support the insulation level of porcelain insulator 2 and operation porcelain insulator 3 far above low pressure.
The length of porcelain insulator 1 of supporting above-mentioned high pressure satisfies high pressure and supports that the insulation level of porcelain insulator 1 is identical with the desired insulation against ground level of DC ice-melting TL electric pressure; It is identical with the desired insulation against ground level of DC de-icing device ice-melt bus DB electric pressure that described low pressure supports that the length of porcelain insulator 2 and operation porcelain insulator 3 satisfies its insulation level.
The low voltage terminal daughter board (9) of three vertical-telescopic disconnecting links among the above-mentioned ice-melt short circuit disconnecting link SC is by connecting busbar 11 and being connected connection
The de-icing method that the utility model overall process utilizes grid switching operation to implement comprises the steps:
1) will need the transmission line TL of ice-melt to be converted to hot stand-by duty, namely the P station disconnects transmission line TL and the circuit breaker Q FA that P station bus is connected, and disconnects the circuit breaker Q FB that is connected with B station respective bus bars;
2) will need the transmission line TL of ice-melt to be converted to cold standby state, namely the P station disconnects transmission line TL and the isolation switch KA that P station bus is connected, and disconnects the isolation switch KB that is connected with B station respective bus bars;
3) the P station ice-melt access disconnecting link SA that transmission line TL is connected with DC de-icing device DI that closes, the ice-melt short circuit disconnecting link SC that Q closes at the station and is connected with transmission line, namely transmission line TL withdraws from cold standby state, enters the ice-melt state;
4) close DC side conversion disconnecting link S1 and S3 confirm that S2 and S4 disconnect;
5) close DC de-icing device DI AC isolation switch K and circuit breaker Q F;
6) start DC de-icing device DI, direct current is risen to the design ice melting current of transmission line TL, wait A and B phase conductor coating ice falling, namely adopt " one goes one time " DC ice melting pattern to realize A and B phase conductor series connection ice-melt, finish mutually locking DC de-icing device DI behind the line ice-melting of A and B;
7) start the ice-melt mode switch logic after the DC de-icing device DI locking, disconnect DC side conversion disconnecting link S3, closed DC side conversion disconnecting link S2 and S4, namely so that S1, S2 and S4 are closed, S3 disconnects, enter " two go one time " DC ice melting pattern, namely connect with the C phase conductor again after A and the parallel connection of B phase conductor;
8) start DC de-icing device DI, direct current is risen to the design ice melting current of transmission line TL, wait C phase conductor coating ice falling, finish locking DC de-icing device DI after the ice-melt of C phase conductor;
9) disconnect DC de-icing device DI AC circuit breaker Q F and isolation switch K;
10) disconnect DC side change over switch S1, S2 and S4, confirm that S1, S2, S3 and S4 disconnect;
11) the P station disconnects the ice-melt access disconnecting link SA that transmission line TL is connected with DC de-icing device DI, and the Q station disconnects the ice-melt short circuit disconnecting link SC that is connected with transmission line TL, and namely transmission line TL withdraws from the ice-melt state, enters cold standby state;
12) transmission line TL is converted to hot stand-by duty, i.e. the P station isolation switch KA that transmission line TL and P station bus is connected that closes, the isolation switch KB that B closes at the station and is connected with respective bus bars;
13) transmission line TL is converted to running status, namely close behind the circuit breaker Q FA that transmission line TL and P station bus is connected in the A station, the circuit breaker Q FB that Q closes at the station and is connected with respective bus bars.
The utility model compared with prior art has following features:
1) the utility model is easy to operate, need not artificial field connection, need not tool using, uses manpower and material resources sparingly the personal injury that may bring when having avoided simultaneously artificial patch.
Line outage time when 2) the utility model shortens ice-melt greatly, the method in the utility model can be controlled at 500kV circuit total ice-melt time in 4 hours.Finish access and the disconnection of deicing device by grid switching operation action, circuit does not exist and turns the repair time, greatly improves ice-melt efficient.
3) the utility model reliability is high.Artificial patch may so that ice-melt can't be carried out smoothly, adopt this programme to realize automatically access because unreasonable operation causes connection reliability can not be guaranteed, and reliability improves.
4) capital equipment that uses of de-icing method of the present utility model is one group and is connected ice-melt with DC ice-melting and accesses disconnecting link and one group of ice-melt short circuit disconnecting link, adopt three single-post single-arm vertical retractable isolation switchs or single-column both arms vertical-telescopic isolation switch to realize, take up an area less, when the transformer station that has built up implements improvement project, generally need not to carry out new expropriation of land, possess preferably operational feasibility.
Claims (9)
1. overall process is utilized the transmission line ice melting system that grid switching operation is implemented, it is characterized in that comprising DC de-icing device DI, DC side conversion disconnecting link S1, S2, S3 and S4, ice-melt bus DB, ice-melt access disconnecting link SA, need ice-thawing electric transmission line TL, ice-melt short circuit disconnecting link SC, and DC de-icing device DI with and the P of place transformer station station in the circuit breaker Q F that is connected of bus, isolation switch K, the circuit breaker Q FA that transmission line TL is connected with P station ac bus, isolation switch KA, transmission line TL and the Q of another transformer station circuit breaker Q FB that corresponding ac bus is connected that stands, isolation switch KB, link to each other with DC de-icing device DI negative pole behind the end short circuit of DC side conversion disconnecting link S1 and S2, link to each other with DC de-icing device DI positive pole behind DC side conversion disconnecting link S3 and the S4 one end short circuit; The DC side conversion disconnecting link S1 other end is connected with A among the ice-melt bus DB, is connected with B among the ice-melt bus DB behind DC side conversion disconnecting link S2 and the S3 other end short circuit, and DC side is changed the disconnecting link S4 other end and is connected with C among the ice-melt bus DB; The low-pressure side of ice-melt access disconnecting link SA is connected with ice-melt bus DB, and the high-pressure side of ice-melt access disconnecting link SA is connected with transmission line TL; The low-pressure side short circuit of ice-melt short circuit disconnecting link SC, the high-pressure side of ice-melt short circuit disconnecting link SC is connected with transmission line TL.
2. overall process according to claim 1 is utilized the transmission line ice melting system that grid switching operation is implemented, and it is characterized in that being connected and isolate by ice-melt and accessing disconnecting link SA and ice-melt short circuit disconnecting link SC realization of above-mentioned transmission line TL and DC de-icing device DI.
3. overall process according to claim 1 is utilized the transmission line ice melting system that grid switching operation is implemented, two bridge mid points are unique earth point of direct current ice melting system when it is characterized in that above-mentioned DC de-icing device DI adopts two six fluctuation bridge cascaded structures, adopt single six fluctuation bridges or during with two six fluctuation bridge parallel-connection structures direct current ice melting system without earth point.
4. overall process according to claim 1 is utilized the transmission line ice melting system that grid switching operation is implemented, and it is characterized in that above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt three single-post single-arm vertical retractable isolation switchs or single-column both arms vertical-telescopic isolation switch to consist of.
5. overall process according to claim 1 is utilized the transmission line ice melting system that grid switching operation is implemented, the low-pressure end short circuit that it is characterized in that three vertical-telescopic disconnecting links among the above-mentioned ice-melt short circuit disconnecting link SC, the low-pressure end of three vertical-telescopic disconnecting links among the ice-melt access disconnecting link SA is short circuit not.
6. the transmission line ice melting system that utilizes grid switching operation to implement to 5 described overall processes according to claim 1 is characterized in that the vertical-telescopic disconnecting link that above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC adopt comprises high pressure support porcelain insulator (1), low pressure support porcelain insulator (2), operation porcelain insulator (3), vertical opening type operator lock (4), fixed contact (5), moving contact (6), grading ring (7), high-voltage terminal daughter board (8), low voltage terminal daughter board (9), operator lock motor-operating mechanism (10); Described high pressure supports the top of porcelain insulator (1) to be connected with the fixing conduction in the bottom surface of grading ring (7); Described high pressure supports the end face of porcelain insulator (1) to be installed with high-voltage terminal daughter board (8), the bottom surface of grading ring (7) also is installed with fixed contact (5), and connects for conduction between fixed contact (5), high-voltage terminal daughter board (8) and the grading ring (7); Low pressure supports that porcelain insulator (2) is contour with operation porcelain vase (3), be parallel to each other and the upper end links to each other; Described low pressure supports porcelain insulator (2) top to be fixedly connected with described low voltage terminal daughter board (9) and vertical opening type operator lock (4), be fixedly connected with for conducting electricity between low voltage terminal daughter board (9) and described vertical opening type operator lock (4) lower end, vertical opening type is operated and is fixedly connected with for conducting electricity between lock (4) top and the described moving contact (6); Be in transmission connection by operation porcelain vase (3) between operator lock motor-operating mechanism (10) and the vertical opening type operator lock (4); Length after described vertical opening type operator lock (4) stretches can make moving contact (6) contact with fixed contact (5), described vertical opening type operate lock (4) when not stretching moving contact (6) and distance between the fixed contact (5) to satisfy the insulation level of insulation level between moving contact (6) and the fixed contact (5) and the desired power switchgear fracture of DC ice-melting electric pressure identical.
7. overall process according to claim 6 is utilized the transmission line ice melting system that grid switching operation is implemented, the low pressure that it is characterized in that above-mentioned ice-melt access disconnecting link SA and ice-melt short circuit disconnecting link SC supports porcelain insulator (2) identical with the insulation level of operation porcelain insulator (3), and high pressure supports the insulation level of porcelain insulator (1) to support the insulation level of porcelain insulator (2) and operation porcelain insulator (3) far above low pressure.
8. overall process according to claim 6 is utilized the transmission line ice melting system that grid switching operation is implemented, and it is characterized in that above-mentioned high pressure supports the length of porcelain insulator (1) to satisfy high pressure and support that the insulation level of porcelain insulator (1) is identical with the desired insulation against ground level of DC ice-melting TL electric pressure; It is identical with the desired insulation against ground level of DC de-icing device ice-melt bus DB electric pressure that described low pressure supports that the length of porcelain insulator (2) and operation porcelain insulator (3) satisfies its insulation level.
9. overall process according to claim 6 is utilized the transmission line ice melting system that grid switching operation is implemented, and it is characterized in that the low voltage terminal daughter board (9) of three vertical-telescopic disconnecting links among the ice-melt short circuit disconnecting link SC is by connecting busbar (11) and being connected 12) connect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220243034 CN202749782U (en) | 2012-05-28 | 2012-05-28 | Transmission line ice melting system implemented by switching operation in whole process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220243034 CN202749782U (en) | 2012-05-28 | 2012-05-28 | Transmission line ice melting system implemented by switching operation in whole process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103616537A (en) * | 2013-10-28 | 2014-03-05 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A lightning protection state-transforming apparatus and a method for measuring the capacitance to ground and the line inductance value thereof |
| CN103956701A (en) * | 2014-04-29 | 2014-07-30 | 刘化交 | Multifunctional charged intelligent ice melting system |
| CN103971974A (en) * | 2014-04-04 | 2014-08-06 | 国家电网公司 | Double-insulator ice-melting grounding disconnector |
| CN106786310A (en) * | 2017-02-21 | 2017-05-31 | 中国南方电网有限责任公司超高压输电公司贵阳局 | A kind of super-pressure ice-melt optimizes system and optimization method |
| CN108092182A (en) * | 2017-12-28 | 2018-05-29 | 国网湖南省电力有限公司 | Ultra-high-tension power transmission line is segmented de-icing method and system |
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| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
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- 2012-05-28 CN CN 201220243034 patent/CN202749782U/en not_active Expired - Lifetime
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| CN103616537A (en) * | 2013-10-28 | 2014-03-05 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A lightning protection state-transforming apparatus and a method for measuring the capacitance to ground and the line inductance value thereof |
| CN103616537B (en) * | 2013-10-28 | 2016-03-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method of lightning protection back brake device and measurement ground capacitance and line electricity sensibility reciprocal |
| CN103971974A (en) * | 2014-04-04 | 2014-08-06 | 国家电网公司 | Double-insulator ice-melting grounding disconnector |
| CN103956701A (en) * | 2014-04-29 | 2014-07-30 | 刘化交 | Multifunctional charged intelligent ice melting system |
| CN106786310A (en) * | 2017-02-21 | 2017-05-31 | 中国南方电网有限责任公司超高压输电公司贵阳局 | A kind of super-pressure ice-melt optimizes system and optimization method |
| CN108092182A (en) * | 2017-12-28 | 2018-05-29 | 国网湖南省电力有限公司 | Ultra-high-tension power transmission line is segmented de-icing method and system |
| CN108092182B (en) * | 2017-12-28 | 2021-01-15 | 国网湖南省电力有限公司 | Segmented ice melting method and system for high-voltage transmission line |
| CN109887798A (en) * | 2019-04-16 | 2019-06-14 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of single ground connection combined type ice-melt disconnecting switch |
| CN110535061A (en) * | 2019-07-15 | 2019-12-03 | 贵州电网有限责任公司 | One kind being used for the online ice-melt substation back brake method of electric line |
| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
| CN111668791A (en) * | 2020-06-19 | 2020-09-15 | 南方电网数字电网研究院有限公司 | DC serial ice melting device and system |
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