CN212485806U - Main wiring structure of transformer substation - Google Patents
Main wiring structure of transformer substation Download PDFInfo
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- CN212485806U CN212485806U CN202021304029.6U CN202021304029U CN212485806U CN 212485806 U CN212485806 U CN 212485806U CN 202021304029 U CN202021304029 U CN 202021304029U CN 212485806 U CN212485806 U CN 212485806U
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Abstract
The embodiment of the utility model discloses main wiring structure of transformer substation, include: the first busbar, the second busbar, the third busbar, the first busbar spacing, the second busbar spacing, the third busbar spacing, the first busbar voltage transformer spacing, the second busbar voltage transformer spacing, the third busbar spacing, the first busbar grounding disconnecting link, the second busbar grounding disconnecting link, the third busbar grounding disconnecting link, the first busbar arrester, the second busbar arrester, the third busbar arrester, the first incoming line main transformer spacing, the second incoming line main transformer spacing, the third incoming line main transformer spacing, and a plurality of outgoing line spacings. The utility model discloses the main wiring structure of transformer substation is the incomplete three generating line structure transformer substation owner mode of working a telephone switchboard, makes trouble power failure scope little, and the processing mode is simple, and the reliability is high, easily extension, and spatial grid structure is clear, and the operational mode is nimble.
Description
Technical Field
The utility model relates to an electric power industry electric wire netting planning technical field especially relates to a main wiring structure of transformer substation
Background
The main electrical wiring of power plant and transformer substation is the circuit that is connected by generator, transformer, circuit breaker, isolator, mutual-inductor, bus and cable etc. according to certain order for showing production, collection and distribution electric energy, and main electrical wiring is also called once wiring or main electrical system, has represented the major structure of power plant and transformer substation electric part, directly influences the selection of transformer device's arrangement, relay protection device, automatics and control mode, plays decisive effect to reliability, flexibility and the economic nature of operation.
At present, most of 330kV and above voltage class substations adopt a three-half wiring mode, and most of 220kV and below voltage class substations adopt a single-bus subsection or double-bus subsection wiring mode. The single-bus sectional wiring has the characteristics of simplicity, economy and convenience, and is suitable for a transformer substation with 4-turn 110kV and 220kV feeders; the double-bus sectional wiring can be used for overhauling buses in turn, is flexible in scheduling, convenient to expand and test and suitable for substations with 110kV and 220kV feeders above 6 turns.
The connection mode has the following problems in the actual operation process of the power grid:
1. as shown in fig. 1, for the double-bus or double-bus segment connection mode:
when the bus N-1-1 fails, all outgoing lines lose power, and the tail end power grid loses voltage. In a normal operation mode, the double-circuit lines are respectively connected with different buses, for example, the L1 is connected with the bus # 1M-A for operation, the line L2 is connected with the bus # 2M, if the bus # 2M is overhauled, outgoing lines carried by the bus # 2M need to be switched to the bus # 1M-A for operation, and at the moment, if the bus # 1M-A fails, all outgoing lines are cut off at the same time. If the two-circuit lines L1 and L2 are connected to an end-of-grid substation or a power plant, the two-circuit radial open grid structure shown in fig. 2 will directly cause a full stop accident of the substation or the power plant.
And when the bus is in an N-2 fault, all outgoing lines lose power, and a tail end power grid loses voltage. If the bus # 2M is overhauled, outgoing lines carried by the bus # 2M need to be switched to the bus # 1M-A to operate, the bus # 1M-A power transformer G01 fails under the working condition, all outgoing lines lose power supply points, the outgoing lines with the number of double loops or more lose power at the same time, and a tail end power grid loses voltage.
The double circuit lines of the line are connected into different bus sections, so that the risk of full stop of two lines caused by bus running faults under any bus maintenance condition can be avoided, but because the double circuit lines use the same line corridor, the outgoing line directions need to be kept in the same direction, the line feeding-out time needs to be crossed with other spaced outgoing lines at intervals, as shown in fig. 3, the fault of a cross point causes the fault tripping of a plurality of cross lines, and is limited by the cross crossing distance of the lines, the occupied area of an equipment area is large, and the field framework arrangement is complex; the line outgoing adopts the cable mode layout, and the engineering investment is big, has the operation accident risk, and the feeder is difficult to realize when more.
And when the N-1-1 of the transformer fails, all outgoing lines lose power, and a tail end power grid loses voltage. When a certain bus transformer fails or is overhauled, for example, a bus # 2M power main transformer G02 fails, a bus coupler QM1 is automatically switched on, so that an outgoing line from the main transformer G02 is supplied to a bus # 1M-A through the bus coupler QM1, under the working condition, the bus # 1M-A power transformer G01 fails, all outgoing lines lose power points, the outgoing lines in double loops and the outgoing lines in the number above lose power at the same time, and a tail end power grid loses voltage.
And when the N-2 of the transformer fails, all outgoing lines lose power, and a tail end power grid loses voltage. When a certain bus transformer fails or is overhauled, for example, a bus # 2M power main transformer G02 fails, a bus tie breaker QM1 is automatically switched on, so that an outgoing line from the main transformer G02 is supplied to a bus # 1M-A through the bus tie breaker QM1, the most serious N-2 fault under the working condition is that the bus fails, for example, the bus # 1M-A fails, all outgoing lines of the bus # 1M-A and the bus # 2M supplied by the main transformer G01 trip and lose power, outgoing lines with the number of two loops and the number of the outgoing lines lose power at the same time, and a tail end power grid loses voltage.
2. The three-half connection mode has the characteristics of high power supply reliability and no influence on normal operation of normal equipment due to fault tripping of any one short circuiter, but the faults of the bus N-1-1 and the transformer N-1-1 still cause simultaneous power loss of double-circuit and above outgoing lines and voltage loss of a tail end power grid. In addition, 1.5 circuit breakers are required to be arranged at each outgoing line interval, and the cost is higher than that of a double-bus or double-bus sectional wiring mode.
Along with the improvement of the circuit breaker manufacturing process and the operation and maintenance level in recent years, the fault rate and the outage maintenance time of the circuit breaker are greatly reduced, and for the outgoing low-voltage-level line adopting the double-circuit design, the outage one-circuit line cannot cause contact interruption, so that the investment of the circuit breaker can be reduced and the investment waste can be avoided by adopting a flexible and reliable wiring mode.
In order to meet the measuring indexes of the reliability, flexibility and economy of the wiring mode, the equipment investment, the field construction difficulty, the occupied quantity of corridor channels and the engineering practical value are comprehensively considered, the defects of the existing wiring mode are necessarily improved, and a novel transformer substation electrical main wiring mode which is safe, reliable and flexible in mode is designed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a main wiring structure of transformer substation to solve prior art's wiring mode reliability and nimble poor problem.
The embodiment of the utility model discloses following technical scheme:
a main wiring structure of a substation, comprising: the system comprises a first bus bar, a second bus bar, a third bus bar, a first bus-coupled circuit breaker interval, a second bus-coupled circuit breaker interval, a third bus-coupled circuit breaker interval, a first bus voltage transformer interval, a second bus voltage transformer interval, a third bus voltage transformer interval, a first bus grounding disconnecting link, a second bus grounding disconnecting link, a third bus grounding disconnecting link, a first bus lightning arrester, a second bus lightning arrester, a third bus lightning arrester, a first incoming line main transformer interval, a second incoming line main transformer interval and a plurality of outgoing line intervals; the two ends of the first busbar circuit breaker interval are respectively connected with the first bus bar and the second bus bar, the two ends of the second busbar circuit breaker interval are respectively connected with the second bus bar and the third bus bar, and the two ends of the third busbar circuit breaker interval are respectively connected with the first bus bar and the third bus bar; the first bus voltage transformer interval is connected with the first bus bar, the second bus voltage transformer interval is connected with the second bus bar, and the third bus voltage transformer interval is connected with the third bus bar; the first bus grounding disconnecting link is connected with the first bus bar, the second bus grounding disconnecting link is connected with the second bus bar, and the third bus grounding disconnecting link is connected with the third bus bar; the first bus bar electric arrester is connected with the first bus bar, the second bus bar electric arrester is connected with the second bus bar, and the third bus bar electric arrester is connected with the third bus bar; the two ends of the first incoming line main transformer interval are respectively connected with the first bus bar and the second bus bar, the two ends of the second incoming line main transformer interval are respectively connected with the second bus bar and the third bus bar, and the two ends of the third incoming line main transformer interval are respectively connected with the first bus bar and the third bus bar; two ends of each outgoing line interval are connected with any two of the first bus bar, the second bus bar and the third bus bar.
Further: if at least two outgoing line intervals are connected to the same transformer substation, the bus bars connected to the two ends of each outgoing line interval are different.
Further: the first bus bar, the second bus bar, and the third bus bar are arranged in parallel with each other.
Further, the first buscouple breaker interval comprises: the circuit breaker comprises a first circuit breaker, a first isolating switch, a second isolating switch, a first grounding disconnecting link, a second grounding disconnecting link, a first current transformer and a second current transformer, wherein two ends of the first circuit breaker are respectively connected with one end of the first isolating switch and one end of the second isolating switch, the other end of the first isolating switch is connected with the first bus bar, the other end of the second isolating switch is connected with the second bus bar, one end of the first grounding disconnecting link is connected with one end of the first isolating switch, one end of the second grounding disconnecting link is connected with one end of the second isolating switch, the other end of the first grounding disconnecting link and the other end of the second grounding disconnecting link are both grounded, and the first current transformer and the second current transformer are respectively connected with two ends of the first circuit breaker in series; the second buscouple breaker interval comprises: the two ends of the second circuit breaker are respectively connected with one end of the third isolating switch and one end of the fourth isolating switch, the other end of the third isolating switch is connected with the second bus bar, the other end of the fourth isolating switch is connected with the third bus bar, one end of the third grounding disconnecting switch is connected with one end of the third isolating switch, one end of the fourth grounding disconnecting switch is connected with one end of the fourth isolating switch, the other end of the third grounding disconnecting switch and the other end of the fourth grounding disconnecting switch are both grounded, and the third current transformer and the fourth current transformer are respectively connected with the two ends of the second circuit breaker in series; the third buscouple breaker interval comprises: third circuit breaker, fifth isolator, sixth isolator, fifth ground connection switch, sixth ground connection switch, fifth current transformer and sixth current transformer, the both ends of third circuit breaker are connected respectively fifth isolator's one end with sixth isolator's one end, fifth isolator's the other end is connected first busbar that converges, sixth isolator's the other end is connected the third busbar that converges, the one end of fifth ground connection switch is connected fifth isolator's one end, the one end of sixth ground connection switch is connected sixth isolator's one end, the other end of fifth ground connection switch with the other end of sixth ground connection switch is all grounded, fifth current transformer with sixth current transformer establishes ties respectively the both ends of third circuit breaker.
Further, the first bus voltage transformer bay comprises: the two ends of the seventh isolating switch are respectively connected with one end of the first voltage transformer unit and the first bus bar, one end of the seventh grounding disconnecting switch is connected with one end of the first voltage transformer unit, and the other end of the seventh grounding disconnecting switch is grounded; the second bus voltage transformer bay comprises: the two ends of the eighth isolating switch are respectively connected with one end of the second voltage transformer unit and the second bus bar, one end of the eighth grounding disconnecting switch is connected with one end of the second voltage transformer unit, and the other end of the eighth grounding disconnecting switch is grounded; the third bus voltage transformer bay comprises: the two ends of the ninth isolating switch are respectively connected with one end of the third voltage transformer unit and the third bus bar, one end of the ninth grounding switch is connected with one end of the third voltage transformer unit, and the other end of the ninth grounding switch is grounded.
Further, the first incoming line main transformer bay comprises: a first transformer, a first voltage transformer, a first lightning arrester, a fourth circuit breaker, a tenth isolating switch, an eleventh isolating switch, a twelfth isolating switch, a tenth grounding disconnecting link, an eleventh grounding disconnecting link, a twelfth grounding disconnecting link, a seventh current transformer and an eighth current transformer, wherein one end of the tenth isolating switch is respectively connected with one ends of the first transformer, the first voltage transformer, the first lightning arrester and the tenth grounding disconnecting link, the other end of the tenth isolating switch is connected with one end of the fourth circuit breaker and one end of the eleventh grounding disconnecting link, the other end of the fourth circuit breaker is respectively connected with one end of the eleventh isolating switch, one end of the twelfth isolating switch and one end of the twelfth grounding disconnecting link, and the other end of the eleventh isolating switch is connected with the first bus bar, the other end of the twelfth disconnecting switch is connected with the second bus bar, the other end of the tenth grounding disconnecting link, the other end of the eleventh grounding disconnecting link and the other end of the twelfth grounding disconnecting link are grounded, and the seventh current transformer and the eighth current transformer are respectively connected in series at two ends of the fourth circuit breaker; said second incoming line main transformer bay comprising: a second transformer, a second voltage transformer, a second lightning arrester, a fifth circuit breaker, a thirteenth disconnecting switch, a fourteenth disconnecting switch, a fifteenth disconnecting switch, a thirteenth grounding switch, a fourteenth grounding switch, a fifteenth grounding switch, a ninth current transformer and a tenth current transformer, wherein one end of the thirteenth disconnecting switch is connected with one ends of the second transformer, the second voltage transformer, the second lightning arrester and the thirteenth grounding switch respectively, the other end of the thirteenth disconnecting switch is connected with one end of the fifth circuit breaker and one end of the fourteenth grounding switch, the other end of the fifth circuit breaker is connected with one end of the fourteenth disconnecting switch, one end of the fifteenth disconnecting switch and one end of the fifteenth grounding switch respectively, and the other end of the fourteenth disconnecting switch is connected with the second bus bar, the other end of the fifteenth isolating switch is connected with the third bus bar, the other end of the thirteenth grounding disconnecting link, the other end of the fourteenth grounding disconnecting link and the other end of the fifteenth grounding disconnecting link are grounded, and the ninth current transformer and the tenth current transformer are respectively connected in series at two ends of the fifth circuit breaker; the third incoming main transformer bay comprises: a third transformer, a third voltage transformer, a third lightning arrester, a sixth circuit breaker, a sixteenth isolating switch, a seventeenth isolating switch, an eighteenth isolating switch, a sixteenth grounding switch, a seventeenth grounding switch, an eighteenth grounding switch, an eleventh current transformer and a twelfth current transformer, wherein one end of the sixteenth isolating switch is respectively connected with one ends of the third transformer, the third voltage transformer, the third lightning arrester and the sixteenth grounding switch, the other end of the sixteenth isolating switch is connected with one end of the sixth circuit breaker and one end of the seventeenth grounding switch, the other end of the sixth circuit breaker is respectively connected with one end of the seventeenth isolating switch, one end of the eighteenth isolating switch and one end of the eighteenth grounding switch, and the other end of the seventeenth isolating switch is connected with the first bus bar, the other end of the eighteenth isolating switch is connected with the third bus bar, the other end of the sixteenth grounding disconnecting link, the other end of the seventeenth grounding disconnecting link and the other end of the eighteenth grounding disconnecting link are all grounded, and the eleventh current transformer and the twelfth current transformer are respectively connected with two ends of the sixth circuit breaker in series.
Further, the outlet interval includes: the system comprises an outgoing line, a seventh circuit breaker, a nineteenth disconnecting switch, a twentieth disconnecting switch, a twenty-first disconnecting switch, a fourth voltage transformer, a fourth lightning arrester, a nineteenth grounding disconnecting link, a twentieth grounding disconnecting link, a twenty-first grounding disconnecting link, a thirteenth current transformer and a fourteenth current transformer; one end of the nineteenth isolating switch is connected with one end of the outgoing line, one end of the fourth voltage transformer, one end of the fourth lightning arrester and one end of the nineteenth grounding disconnecting link respectively, the other end of the nineteenth isolating switch is connected with one end of the seventh circuit breaker and one end of the twentieth grounding disconnecting link, the other end of the seventh circuit breaker is connected with one end of the twentieth isolating switch, one end of the twenty-first isolating switch and one end of the twenty-first grounding disconnecting link respectively, the other end of the twentieth isolating switch is connected with the first bus bar, the second bus bar or the third bus bar, the other end of the twenty-first isolating switch is connected with the first bus bar, the second bus bar or the third bus bar, and the twentieth isolating switch and the twenty-first isolating switch are connected with different bus bars, the other end of nineteenth earthing knife-switch, the other end of twentieth earthing knife-switch and the other end of twenty-first earthing knife-switch all ground connection, thirteenth current transformer with the fourteenth current transformer is established ties respectively the both ends of seventh circuit breaker.
The main wiring structure of the transformer substation provided by the embodiment of the utility model has the advantages that when a bus fault or a transformer fault occurs, a terminal power grid is not subjected to voltage loss, all outgoing lines are not affected in power supply, the reliability and flexibility of a wiring mode are ensured, and the problems of outgoing line interval crossing and the like do not exist; the outdoor open-type substation can be suitable for multiple voltage levels, the wiring mode is simple, the construction is newly built, the existing substation wiring transformation is convenient, the whole floor area for outdoor open-type substation transformation is only increased by one half, the area for GIS equipment transformation is zero, and the outdoor open-type substation wiring transformation is easy to popularize; one circuit breaker and two isolating switches are required to be arranged on each outgoing line interval bus side, and the number of single outgoing line interval circuit breakers is the same as that of double-bus, double-bus section and complete three-bus wiring modes, and is reduced by 0.5 compared with a three-half wiring mode; the number of the isolating switches is the same as that of the double-bus or double-bus sectional wiring mode, and is reduced by one compared with a complete three-bus or three-half wiring mode; aiming at the faults of the bus and the main transformer N-2, the power supply reliability is obviously improved and the economy is considered at the same time compared with the traditional double-bus, double-bus section and three-half wiring mode of the transformer substation, and the power supply system is suitable for popularization and application in a power transmission and distribution end power grid without a ring network structure; the method has the characteristics of small fault power failure range, simple processing mode, high reliability, relatively fixed model, easy expansion, clear grid structure, flexible operation mode and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a prior art double bus single segment wiring scheme;
FIG. 2 is a prior art two-wire radial open grid architecture diagram;
FIG. 3 is a schematic illustration of a prior art twin wire access differential bus section retrofit configuration;
fig. 4 is a schematic diagram of a main wiring structure of a substation according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an X330 kV side wiring mode of a certain 750kV transformer substation;
FIG. 6 is a diagram of a power grid structure around an X-type 750kV transformer substation;
fig. 7 is adopting the utility model discloses the main wiring structure of transformer substation reforms transform the schematic diagram to the incomplete three generating lines wiring of certain 750kV transformer substation X330 kV side.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a main wiring structure of transformer substation. The main wiring structure is an incomplete three-bus transformer station main wiring mode. As shown in fig. 4, the main wiring structure includes: first busbar 1M, second busbar 2M, third busbar 3M, first bus tie circuit breaker interval 1, second bus tie circuit breaker interval 2, third bus tie circuit breaker interval 3, first busbar voltage transformer interval 4, second busbar voltage transformer interval 5, third busbar voltage transformer interval 6, first busbar arrester F1, second busbar arrester F2, third busbar arrester F3, first incoming line main transformer interval 7, second incoming line main transformer interval 8, third incoming line main transformer interval 9, and a plurality of outgoing line intervals 10. Specifically, the first bus bar 1M, the second bus bar 2M, and the third bus bar 3M are arranged in parallel with each other.
Two ends of the first bus tie breaker interval 1 are respectively connected with a first bus bar 1M and a second bus bar 2M. Two ends of the second bus tie breaker interval 2 are respectively connected with a second bus bar 2M and a third bus bar 3M. The two ends of the third busbar circuit breaker interval 3 are respectively connected with a first busbar 1M and a third busbar 3M.
The first busbar potential transformer bay 4 is connected to the first busbar 1M. The second busbar potential transformer bay 5 is connected to the second busbar 2M. The third busbar potential transformer bay 6 is connected to the third busbar 3M.
The first bus grounding switch DM1 is connected to the first bus bar 1M and is a grounding point of the first bus bar 1M. The second bus grounding disconnecting link DM2 is connected to the second bus bar 2M and is a grounding point of the second bus bar 2M. The third bus grounding disconnecting link DM3 is connected to the third bus bar 3M and is a grounding point of the third bus bar 3M.
The first bus bar lightning arrester FM1 is connected to the first bus bar 1M and serves as an overvoltage protection device for the first bus bar 1M. The second bus bar lightning arrester FM2 is connected to the second bus bar 2M and serves as an overvoltage protection device for the second bus bar 2M. The third bus lightning arrester FM3 is connected to the third bus bar 3M and serves as an overvoltage protection device for the third bus bar 3M.
Two ends of the first inlet wire main transformer interval 7 are respectively connected with a first bus bar 1M and a second bus bar 2M. Two ends of the second inlet wire main transformer interval 8 are respectively connected with a second bus bar 2M and a third bus bar 3M. Two ends of the third incoming main transformer interval 9 are respectively connected with the first bus bar 1M and the third bus bar 3M.
Both ends of each outlet interval 10 are connected to any two of the first bus bar 1M, the second bus bar 2M, and the third bus bar 3M.
Specifically, if at least two outgoing line bays 10 are connected to the same substation, the bus bars connected to both ends of each outgoing line bay 10 are different. Namely, n outgoing line intervals 10 of n (n is more than or equal to 2) incoming and outgoing lines erected on the same pole or of the same transformer substation are required to avoid simultaneous access of two same bus bars.
When a certain bus transformer fails, two bus-coupled circuit breakers related to a fault bus are selectively switched on automatically according to the outgoing line quantity of the other two buses, so that outgoing lines on the buses supplied by the fault transformer are supplied to the buses in normal operation with fewer outgoing lines through one bus-coupled circuit breaker interval, and the other bus-coupled circuit breaker is automatically locked at the interval.
Specifically, first buscouple circuit breaker interval 1 includes: the breaker comprises a first breaker Q1, a first isolating switch G1, a second isolating switch G2, a first grounding disconnecting link D1, a second grounding disconnecting link D2, a first current transformer T1 and a second current transformer T2. Two ends of the first breaker Q1 are connected to one end of the first disconnector G1 and one end of the second disconnector G2, respectively. The other end of the first disconnecting switch G1 is connected to the first bus bar 1M to form a physical isolation point. The other end of the second disconnecting switch G2 is connected to the second bus bar 2M to form a physical isolation point. One end of the first grounding switch D1 is connected to one end of the first isolating switch G1. One end of the second grounding switch D2 is connected to one end of the second isolating switch G2. The other end of the first grounding switch D1 and the other end of the second grounding switch D2 are grounded and serve as grounding points for the first bus bar 1M and the second bus bar 2M, respectively. The first current transformer T1 and the second current transformer T2 are respectively connected in series to both ends of the first breaker Q1, and respectively collect currents of the first bus bar 1M and the second bus bar 2M.
The second buscouple breaker bay 2 includes: a second circuit breaker Q2, a third disconnector G3, a fourth disconnector G4, a third grounding switch D3, a fourth grounding switch D4, a third current transformer T3 and a fourth current transformer T4. Two ends of the second breaker Q2 are connected to one end of the third disconnector G3 and one end of the fourth disconnector G4, respectively. The other end of the third disconnector G3 is connected to the second bus bar 2M, forming a physical isolation point. The other end of the fourth disconnector G4 is connected to the third bus bar 3M, forming a physical isolation point. One end of the third grounding switch D3 is connected to one end of the third isolating switch G3. One end of the fourth grounding switch D4 is connected to one end of the fourth isolating switch G4. The other end of the third grounding disconnecting link D3 and the other end of the fourth grounding disconnecting link D4 are grounded and respectively serve as grounding points of the second bus bar 2M and the third bus bar 3M. The third current transformer T3 and the fourth current transformer T4 are respectively connected in series to two ends of the second breaker Q2, and respectively collect the currents of the second bus bar 2M and the third bus bar 3M.
The third buscouple breaker bay 3 includes: a third circuit breaker Q3, a fifth disconnector G5, a sixth disconnector G6, a fifth grounding switch D5, a sixth grounding switch D6, a fifth current transformer T5 and a sixth current transformer T6. Two ends of the third breaker Q3 are connected to one end of the fifth disconnector G5 and one end of the sixth disconnector G6, respectively. The other end of the fifth disconnector G5 is connected to the first bus bar 1M to form a physical isolation point. The other end of the sixth disconnecting switch G6 is connected to the third bus bar 3M to form a physical isolation point. One end of the fifth grounding switch D5 is connected to one end of the fifth disconnecting switch G5. One end of the sixth grounding switch D6 is connected to one end of the sixth disconnecting switch G6. The other end of the fifth grounding switch D5 and the other end of the sixth grounding switch D6 are grounded and respectively serve as grounding points of the first bus bar 1M and the third bus bar 3M. The fifth current transformer T5 and the sixth current transformer T6 are respectively connected in series to both ends of the third breaker Q3, and respectively collect the currents of the first bus bar 1M and the third bus bar 3M.
Specifically, the first bus voltage transformer bay 4 includes: a first potential transformer unit PT1, a seventh isolating switch G7 and a seventh earthing switch D7. Two ends of the seventh isolating switch G7 are connected to one end of the first voltage transformer unit PT1 and the first bus bar 1M, respectively, to form a physical isolation point. The voltage transformer unit consists of a voltage transformer and two capacitors. One end of the seventh grounding switch D7 is connected to one end of the first voltage transformer unit PT 1. The other end of the seventh grounding switch D7 is grounded as the grounding point of the first busbar potential transformer bay 4.
The second bus voltage transformer bay 5 comprises: a second potential transformer unit PT2, an eighth isolating switch G8 and an eighth grounding knife switch D8. Two ends of the eighth isolating switch G8 are connected to one end of the second voltage transformer unit PT2 and the second bus bar 2M, respectively, to form a physical isolation point. One end of the eighth grounding switch D8 is connected to one end of the second voltage transformer unit PT 2. The other end of the eighth grounding switch D8 is grounded as the grounding point of the second busbar potential transformer bay 5.
The third bus voltage transformer bay 6 comprises: a third potential transformer unit PT3, a ninth disconnector G9 and a ninth earthing switch D9. Two ends of the ninth disconnecting switch G9 are connected to one end of the third potential transformer unit PT3 and the third bus bar 3M, respectively, to form a physical isolation point. One end of the ninth grounding switch D9 is connected to one end of the third voltage transformer unit PT 3. The other end of the ninth grounding switch D9 is grounded as the grounding point of the third busbar potential transformer bay 6.
In particular, the first incoming line main transformer bay 7 comprises: the transformer comprises a first transformer B1, a first voltage transformer P1, a first lightning arrester F1, a fourth breaker Q4, a tenth isolating switch G10, an eleventh isolating switch G11, a twelfth isolating switch G12, a tenth grounding disconnecting link D10, an eleventh grounding disconnecting link D11, a twelfth grounding disconnecting link D12, a seventh current transformer T7 and an eighth current transformer T8. One end of a tenth isolating switch G10 is connected to one end of the first transformer B1, the first voltage transformer P1, the first lightning arrester F1 and the tenth grounding switch D10, respectively. The first voltage transformer P1 acts as a voltage acquisition device for the first incoming line main transformer bay 7. The utility model discloses voltage transformer comprises voltage transformer and two electric capacity. The first surge arrester F1 acts as an overvoltage protection device for the first incoming line main transformer bay 7. The other end of the tenth disconnecting switch G10 is connected to one end of the fourth breaker Q4 and one end of the eleventh grounding switch D11. Therefore, the tenth disconnect switch G10 is located between the fourth breaker Q4 and the first transformer B1, forming a physical isolation point. The other end of the fourth breaker Q4 is connected to one end of an eleventh disconnector G11, one end of a twelfth disconnector G12 and one end of a twelfth grounding switch D12, respectively. The other end of the eleventh disconnecting switch G11 is connected to the first bus bar 1M. Therefore, the eleventh disconnection switch G11 is located between the fourth breaker Q4 and the first bus bar 1M, forming a physical isolation point. The other end of the twelfth disconnecting switch G12 is connected to the second bus bar 2M. Therefore, the twelfth disconnector G12 is located between the fourth breaker Q4 and the second bus bar 2M, forming a physical isolation point. The other end of the tenth earthing switch D10, the other end of the eleventh earthing switch D11 and the other end of the twelfth earthing switch D12 are all earthed. Therefore, the tenth grounding switch D10 serves as a grounding point near the first transformer B1 side, and the eleventh grounding switch D11 and the twelfth grounding switch D12 serve as grounding points near the busbar side. The seventh current transformer T7 and the eighth current transformer T8 are respectively connected in series to two ends of the fourth breaker Q4, and are respectively used for collecting the currents of the first bus bar 1M, the second bus bar 2M and the first transformer B1 for measurement and protection.
The second incoming line main transformer bay 8 comprises: a second transformer B2, a second voltage transformer P2, a second lightning arrester F2, a fifth breaker Q5, a thirteenth disconnector G13, a fourteenth disconnector G14, a fifteenth disconnector G15, a thirteenth grounding switch D13, a fourteenth grounding switch D14, a fifteenth grounding switch D15, a ninth current transformer T9 and a tenth current transformer T10. One end of a thirteenth disconnecting switch G13 is connected to one end of the second transformer B2, the second voltage transformer P2, the second lightning arrester F2 and a thirteenth grounding switch D13, respectively. The second voltage transformer P2 acts as a voltage acquisition device for the second incoming line main transformer bay 8. The second surge arrester F2 acts as an overvoltage protection device for the second incoming line main transformer bay 8. The other end of the thirteenth disconnecting switch G13 is connected to one end of the fifth breaker Q5 and one end of the fourteenth disconnecting link D14. Therefore, the thirteenth disconnect switch G13 is located between the fifth breaker Q5 and the second transformer B2, forming a physical isolation point. The other end of the fifth breaker Q5 is connected to one end of a fourteenth isolating switch G14, one end of a fifteenth isolating switch G15 and one end of a fifteenth grounding switch D15, respectively. The other end of the fourteenth isolating switch G14 is connected to the second bus bar 2M. Therefore, the fourteenth disconnection switch G14 is located between the fifth breaker Q5 and the second bus bar 2M, forming a physical isolation point. The other end of the fifteenth disconnector G15 is connected to the third bus bar 3M. Therefore, the fifteenth disconnector G15 is located between the fifth breaker Q5 and the third bus bar 3M, forming a physical isolation point. The other end of the thirteenth grounding switch D13, the other end of the fourteenth grounding switch D14 and the other end of the fifteenth grounding switch D15 are all grounded. Therefore, the thirteenth grounding switch D13 serves as a grounding point near the second transformer B2 side, and the fourteenth grounding switch D14 and the fifteenth grounding switch D15 serve as grounding points near the busbar side. A ninth current transformer T9 and a tenth current transformer T10 are respectively connected in series to two ends of the fifth breaker Q5, and are respectively used for collecting the currents of the second bus bar 2M, the third bus bar 3M and the second transformer B2 for measurement and protection.
The third incoming main transformer bay 9 comprises: a third transformer B3, a third voltage transformer P3, a third lightning arrester F3, a sixth circuit breaker Q6, a sixteenth disconnecting switch G16, a seventeenth disconnecting switch G17, an eighteenth disconnecting switch G18, a sixteenth grounding knife switch D16, a seventeenth grounding knife switch D17, an eighteenth grounding knife switch D18, an eleventh current transformer T11 and a twelfth current transformer T12. One end of a sixteenth disconnecting switch G16 is connected to one end of a third transformer B3, a third voltage transformer P3, a third lightning arrester F3 and a sixteenth grounding switch D16, respectively. The third voltage transformer P3 acts as a voltage pick-up for the third incoming line main transformer bay 9. The third surge arrester F3 acts as an overvoltage protection device for the third line main transformer bay 9. The other end of the sixteenth disconnecting switch G16 is connected to one end of a sixth breaker Q6 and one end of a seventeenth grounding switch D17. Therefore, the sixteenth isolating switch G16 is located between the sixth breaker Q6 and the third transformer B3, forming a physical isolation point. The other end of the sixth circuit breaker Q6 is connected to one end of a seventeenth disconnecting switch G17, one end of an eighteenth disconnecting switch G18 and one end of an eighteenth grounding switch D18, respectively. The other end of the seventeenth disconnecting switch G17 is connected to the first bus bar 1M. Therefore, the seventeenth disconnecting switch G17 is located between the sixth breaker Q6 and the first bus bar 1M, forming a physical isolation point. The other end of the eighteenth disconnecting switch G18 is connected to the third bus bar 3M. Therefore, the eighteenth disconnection switch G18 is located between the sixth breaker Q6 and the third bus bar 3M, forming a physical isolation point. The other end of the sixteenth grounding switch D16, the other end of the seventeenth grounding switch D17 and the other end of the eighteenth grounding switch D18 are all grounded. Therefore, the sixteenth grounding switch D16 serves as a grounding point near the third transformer B3 side, and the seventeenth grounding switch D17 and the eighteenth grounding switch D18 serve as grounding points near the busbar side. An eleventh current transformer T11 and a twelfth current transformer T12 are respectively connected in series at two ends of the sixth circuit breaker Q6, and are respectively used for collecting the currents of the first bus bar 1M, the third bus bar 3M and the third transformer B3 for measurement and protection.
Specifically, the outlet interval 10 includes: an outgoing line L, a seventh breaker Q7, a nineteenth disconnecting switch G19, a twentieth disconnecting switch G20, a twenty-first disconnecting switch G21, a fourth voltage transformer P4, a fourth lightning arrester F4, a nineteenth grounding disconnecting link D19, a twentieth grounding disconnecting link D20, a twenty-first grounding disconnecting link D21, a thirteenth current transformer T13 and a fourteenth current transformer T14. One end of a nineteenth disconnecting switch G19 is connected to one end of the outgoing line L, the fourth voltage transformer P4, the fourth lightning arrester F4 and one end of a nineteenth earthing switch D19, respectively. A fourth voltage transformer P4 is used to monitor the voltage of the wire interval 10. The fourth surge arrester F4 is used to protect the outgoing line interval 10 from overvoltage. The other end of the nineteenth disconnecting switch G19 is connected to one end of the seventh breaker Q7 and one end of the twentieth earthing switch D20. Therefore, the nineteenth disconnection switch G19 is located between the outgoing line L and the seventh breaker Q7, forming a physical isolation point. The other end of the seventh breaker Q7 is connected to one end of a twentieth disconnecting switch G20, one end of a twenty-first disconnecting switch G21 and one end of a twenty-first grounding switch D21, respectively. The other end of the twentieth disconnecting switch G20 is connected to the first bus bar 1M, the second bus bar 2M, or the third bus bar 3M. Thus, the twentieth disconnector G20 is located between the bus bar and the seventh disconnector Q7, forming a physical isolation point. The other end of the twenty-first disconnecting switch G21 is connected to the first bus bar 1M, the second bus bar 2M, or the third bus bar 3M. Thus, the twenty-first disconnector G21 is located between the bus bar and the seventh breaker Q7, forming a physical isolation point. The twentieth disconnector G20 and the twenty-first disconnector G21 are connected to different bus bars. The other end of the nineteenth earthing switch D19, the other end of the twentieth earthing switch D20 and the other end of the twenty-first earthing switch D21 are all earthed. The nineteenth grounding disconnecting link D19 is connected to the outgoing line side of the outgoing line interval 10 as a grounding point of the outgoing line side of the outgoing line interval 10, and the other end of the twentieth grounding disconnecting link D20 and the twenty-first grounding disconnecting link D21 are connected to the side of the outgoing line interval 10 close to the bus line as a grounding point of the outgoing line interval 10 close to the bus line side. A thirteenth current transformer T13 and a fourteenth current transformer T14 are respectively connected in series at both ends of the seventh circuit breaker Q7. Specifically, the thirteenth current transformer T13 is located on the bus side for monitoring the bus side current of the outgoing line interval 10, and the fourteenth current transformer T14 is located on the outgoing line side of the outgoing line interval 10 for monitoring the outgoing line side current of the outgoing line interval 10.
Through foretell structural design, when taking place busbar "N-1-1" trouble, terminal electric wire netting adopts two times and above being qualified for the next round of competitions promptly, and when a certain maintenance among three busbar in the operation, for example first busbar 1M overhauls, need to take the play line of first busbar 1M and rearrange to operate on second busbar 2M or third busbar 3M, the utility model discloses the many times play line interval 10 inserts two different generating lines under the main wiring mode, so when the play line of first busbar 1M and rearrange the back, the condition that two times, many times are qualified for the next round of competitions all through same busbar power supply can not appear. One bus bar in the operation under the working condition has a fault, for example, the second bus bar 2M has a fault, at the moment, all outgoing lines carried by the second bus bar 2M trip and lose power, partial outgoing lines in the double-return and multi-return outgoing lines can be supplied with power through the third bus bar 3M, the power is not influenced, and the tail end power grid cannot lose voltage. Therefore, when the bus N-1-1 fails, the outgoing lines with the number of the double loops and the number of the outgoing lines are not simultaneously subjected to power loss, and the tail end power grid is not subjected to voltage loss.
In addition, when a bus "N-2" fault occurs, that is, one of three bus bars in operation is overhauled, for example, the first bus bar 1M is overhauled, an outgoing line carried by the first bus bar 1M is switched to the second bus bar 2M or the third bus bar 3M to operate, and when a bus transformer has a fault under the working condition, for example, the second incoming line main transformer interval 8 of the power supply of the second bus bar 2M, the second bus-coupled circuit breaker interval 2 is automatically switched on, so that an outgoing line on a bus supplied by the second incoming line main transformer interval 8 is switched to the third bus bar 3M through the second bus-coupled circuit breaker interval 2, and it is ensured that the power supply of all outgoing lines of the bus "N-2" fault is not affected.
Furthermore, when a transformer "N-1-1" fault occurs, i.e. a certain bus transformer is faulty or overhauled, for example, a first incoming line main transformer interval 7 of a power supply of a first bus bar 1M, a first bus-coupled circuit breaker interval 1 and a third bus-coupled circuit breaker interval 3 related to the first bus bar 1M selectively and automatically close the first bus-coupled circuit breaker interval 1 according to the number of outgoing lines carried by a current second bus bar 2M and a current third bus bar 3M, so that outgoing lines supplied by the first incoming line main transformer interval 7 are transferred to the second bus bar 2M with fewer outgoing lines through the first bus-coupled circuit breaker interval 1, and the third bus-coupled circuit breaker interval 3 is automatically locked. One transformer in operation under this operating mode breaks down, for example, second inlet wire main transformer interval 8 of second busbar 2M's power, second bus tie circuit breaker interval 2 automatic switch-on, make second inlet wire main transformer interval 8 supply the outgoing line through second bus tie circuit breaker interval 2 switching-on to the third busbar 3M that converges, all are qualified for the next round of competitions all through the power supply of third busbar 3M that converges in the station, guarantee that all are qualified for the next round of competitions and supply power when transformer "N-1-1" breaks down and is not influenced.
When a transformer N-2 fault occurs, namely a certain bus transformer fault or maintenance occurs, for example, a first incoming line main transformer interval 7 of a power supply of a first bus bar 1M has a fault or maintenance, a first bus-coupled circuit breaker interval 1 and a third bus-coupled circuit breaker interval 3 related to the first bus bar 1M are automatically switched on the first bus-coupled circuit breaker interval 1 according to the number of outgoing lines carried by a current second bus bar 2M and a current third bus bar 3M, so that outgoing lines supplied by the first incoming line main transformer interval 7 are selectively switched to the second bus bar 2M with fewer outgoing lines through the first bus-coupled circuit breaker interval 1, and the third bus-coupled circuit breaker interval 3 is automatically locked. The most serious N-2 trouble is a generating line trouble down under this operating mode, for example the second busbar 2M trouble that converges, by the second inlet wire main transformer interval 8 supply first busbar 1M that converges, the second busbar 2M that converges all be qualified for the next round of competitions the tripping operation lose electricity, nevertheless adopt two times to reach above being qualified for the next round of competitions to terminal electric wire netting, the utility model discloses a many times under the transformer substation owner's wiring mode are qualified for the next round of competitions interval 10 and are inserted two different generating lines, consequently to another line of being qualified for the next round of competitions of terminal electric wire netting by the third busbar 3M power supply that converges unaffected, terminal electric wire netting can not lose voltage.
The technical solution of the present invention is further explained by a specific embodiment.
Taking a certain 750kV substation X as an example, the 330kV side wiring mode of the substation adopts a double-bus double-section wiring mode, as shown in fig. 5, the outgoing line interval double-outgoing line XA (including outgoing line XAI and outgoing line XAII) and the double-outgoing line XB (including outgoing line XBI and outgoing line xbiii) are respectively the only power supply points of the power grids at the ends of the 330kV substation a and the 330kV substation B, the power grid structure is as shown in fig. 6, taking the double-outgoing line XA as an example, and the wiring mode has the following problems in the actual operation process of the power grid:
when the bus N-1-1 fails, all outgoing lines lose power, and the tail end power grid loses voltage. In a normal operation mode, the bus-coupled circuit breakers QM3 and QM4 are in a closing position, an outgoing line XAI is connected to a 330kVI bus, an outgoing line XAII is connected to a 330kV II bus for operation, one of buses connected with a double-loop outgoing line XA is overhauled, if the bus I is overhauled, the outgoing line XAI carried by the bus I needs to be switched to the bus II for operation, and the double-loop outgoing lines XA are both connected to the bus II. At the moment, if the II bus is in fault, the bus is cut off at the same time, the outgoing line XAI and the outgoing line XAII cause the loss of the only power supply point of the 330kV transformer substation A, and the connected 110kV tail end power grid is totally in voltage loss.
And when the bus is in an N-2 fault, all outgoing lines lose power, and a tail end power grid loses voltage. If I mother overhauls, need to move on II mothers with line XAI that I mother brings, two return line XA all insert II mothers. Under the working condition, the power transformer G02 of the II bus has a fault, the outgoing line XAI and the outgoing line XAII lose power points at the same time, so that the loss of the only power point of the 330kV transformer substation A is caused, and all connected 110kV terminal power grids lose voltage.
And when the N-1-1 of the transformer fails, all outgoing lines lose power, and a tail end power grid loses voltage. When a certain bus transformer fails or is overhauled, for example, when a bus power main transformer G02 fails, a bus coupler circuit breaker QM1 is automatically switched on, so that an outgoing line XAII supplied by the main transformer G02 is supplied to a bus I through the bus coupler circuit breaker QM1, under the working condition, the bus power transformer G01 fails, the outgoing line XAI and an outgoing line XAII lose power points at the same time, the single power point of a 330kV transformer substation A is lost, and the connected 110kV tail end power grid is totally subjected to voltage loss.
And when the N-2 of the transformer fails, all outgoing lines lose power, and a tail end power grid loses voltage. When a certain bus transformer fails or is overhauled, for example, a main transformer G02 of a secondary power supply fails, a bus coupler QM1 is automatically switched on, so that an outgoing line XAII supplied by the main transformer G02 is supplied to a bus I through the bus coupler QM1, the most serious N-2 fault under the working condition is that the bus fails, for example, the bus I fails, the outgoing line XAI and the outgoing line XAII supplied by the main transformer G01 all trip and lose power, the only power supply point of a 330kV transformer substation A is lost, and the tail end power grid of the connected 110kV transformer substation is totally lost.
The above problems also exist for the double-outgoing-line XB and the 330kV substation B.
Adopt the utility model discloses main wiring structure of transformer substation reforms transform 750kV transformer substation X330 kV side wiring mode, as shown in fig. 7. It should be understood that fig. 7 mainly shows three bus tie breaker spacing structures added by modification, and other modified structures are the same as those in fig. 4. Taking the double-return line XA as an example, the outgoing line XAI is supplied with power through the bus bar # 1M across the bus bar # 1M and the bus bar # 2M, and the outgoing line XAII is supplied with power through the bus bar #3M across the bus bar # 2M and the bus bar # 3M. According to the improved main wiring structure, when a bus N-1-1 fault occurs, the outgoing lines with the number of double loops or more are not simultaneously power-off, and a tail end power grid is not voltage-off; when the bus N-2 fails, the power supply of all outgoing lines is not affected; when the fault of the transformer N-1-1 occurs, the power supply of all outgoing lines is not affected; when the N-2 fault of the transformer occurs, the outgoing lines with the number of double loops and above are not lost, and the tail end power grid is not subjected to voltage loss; the problems of line-outgoing interval crossing and the like can be avoided.
To sum up, the main wiring structure of the transformer substation provided by the embodiment of the utility model has the advantages that when a bus fault or a transformer fault occurs, the terminal power grid is not subjected to voltage loss, all outgoing lines are not affected in power supply, the reliability and flexibility of the wiring mode are ensured, and the problems of outgoing line interval crossing and the like do not exist; the outdoor open-type substation can be suitable for multiple voltage levels, the wiring mode is simple, the construction is newly built, the existing substation wiring transformation is convenient, the whole floor area for outdoor open-type substation transformation is only increased by one half, the area for GIS equipment transformation is zero, and the outdoor open-type substation wiring transformation is easy to popularize; one circuit breaker and two isolating switches are required to be arranged on each outgoing line interval bus side, and the number of single outgoing line interval circuit breakers is the same as that of double-bus, double-bus section and complete three-bus wiring modes, and is reduced by 0.5 compared with a three-half wiring mode; the number of the isolating switches is the same as that of the double-bus or double-bus sectional wiring mode, and is reduced by one compared with a complete three-bus or three-half wiring mode; aiming at the faults of the bus and the main transformer N-2, the power supply reliability is obviously improved and the economy is considered at the same time compared with the traditional double-bus, double-bus section and three-half wiring mode of the transformer substation, and the power supply system is suitable for popularization and application in a power transmission and distribution end power grid without a ring network structure; the method has the characteristics of small fault power failure range, simple processing mode, high reliability, relatively fixed model, easy expansion, clear grid structure, flexible operation mode and the like.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A main wiring structure of a transformer substation, characterized by comprising: the system comprises a first bus bar, a second bus bar, a third bus bar, a first bus-coupled circuit breaker interval, a second bus-coupled circuit breaker interval, a third bus-coupled circuit breaker interval, a first bus voltage transformer interval, a second bus voltage transformer interval, a third bus voltage transformer interval, a first bus grounding disconnecting link, a second bus grounding disconnecting link, a third bus grounding disconnecting link, a first bus lightning arrester, a second bus lightning arrester, a third bus lightning arrester, a first incoming line main transformer interval, a second incoming line main transformer interval, a third incoming line main transformer interval and a plurality of outgoing line intervals;
the two ends of the first busbar circuit breaker interval are respectively connected with the first bus bar and the second bus bar, the two ends of the second busbar circuit breaker interval are respectively connected with the second bus bar and the third bus bar, and the two ends of the third busbar circuit breaker interval are respectively connected with the first bus bar and the third bus bar;
the first bus voltage transformer interval is connected with the first bus bar, the second bus voltage transformer interval is connected with the second bus bar, and the third bus voltage transformer interval is connected with the third bus bar;
the first bus grounding disconnecting link is connected with the first bus bar, the second bus grounding disconnecting link is connected with the second bus bar, and the third bus grounding disconnecting link is connected with the third bus bar;
the first bus arrester is connected with the first bus bar, the second bus arrester is connected with the second bus bar, and the third bus arrester is connected with the third bus bar;
the two ends of the first incoming line main transformer interval are respectively connected with the first bus bar and the second bus bar, the two ends of the second incoming line main transformer interval are respectively connected with the second bus bar and the third bus bar, and the two ends of the third incoming line main transformer interval are respectively connected with the first bus bar and the third bus bar;
two ends of each outgoing line interval are connected with any two of the first bus bar, the second bus bar and the third bus bar.
2. The main wiring structure of a substation according to claim 1, characterized in that: if at least two outgoing line intervals are connected to the same transformer substation, the bus bars connected to the two ends of each outgoing line interval are different.
3. The main wiring structure of a substation according to claim 1, characterized in that: the first bus bar, the second bus bar, and the third bus bar are arranged in parallel with each other.
4. Main wiring structure of a substation according to claim 1,
the first buscouple breaker bay comprises: the circuit breaker comprises a first circuit breaker, a first isolating switch, a second isolating switch, a first grounding disconnecting link, a second grounding disconnecting link, a first current transformer and a second current transformer, wherein two ends of the first circuit breaker are respectively connected with one end of the first isolating switch and one end of the second isolating switch, the other end of the first isolating switch is connected with the first bus bar, the other end of the second isolating switch is connected with the second bus bar, one end of the first grounding disconnecting link is connected with one end of the first isolating switch, one end of the second grounding disconnecting link is connected with one end of the second isolating switch, the other end of the first grounding disconnecting link and the other end of the second grounding disconnecting link are both grounded, and the first current transformer and the second current transformer are respectively connected with two ends of the first circuit breaker in series;
the second buscouple breaker interval comprises: the two ends of the second circuit breaker are respectively connected with one end of the third isolating switch and one end of the fourth isolating switch, the other end of the third isolating switch is connected with the second bus bar, the other end of the fourth isolating switch is connected with the third bus bar, one end of the third grounding disconnecting switch is connected with one end of the third isolating switch, one end of the fourth grounding disconnecting switch is connected with one end of the fourth isolating switch, the other end of the third grounding disconnecting switch and the other end of the fourth grounding disconnecting switch are both grounded, and the third current transformer and the fourth current transformer are respectively connected with the two ends of the second circuit breaker in series;
the third buscouple breaker interval comprises: third circuit breaker, fifth isolator, sixth isolator, fifth ground connection switch, sixth ground connection switch, fifth current transformer and sixth current transformer, the both ends of third circuit breaker are connected respectively fifth isolator's one end with sixth isolator's one end, fifth isolator's the other end is connected first busbar that converges, sixth isolator's the other end is connected the third busbar that converges, the one end of fifth ground connection switch is connected fifth isolator's one end, the one end of sixth ground connection switch is connected sixth isolator's one end, the other end of fifth ground connection switch with the other end of sixth ground connection switch is all grounded, fifth current transformer with sixth current transformer establishes ties respectively the both ends of third circuit breaker.
5. Main wiring structure of a substation according to claim 1,
the first bus voltage transformer bay comprises: the two ends of the seventh isolating switch are respectively connected with one end of the first voltage transformer unit and the first bus bar, one end of the seventh grounding disconnecting switch is connected with one end of the first voltage transformer unit, and the other end of the seventh grounding disconnecting switch is grounded;
the second bus voltage transformer bay comprises: the two ends of the eighth isolating switch are respectively connected with one end of the second voltage transformer unit and the second bus bar, one end of the eighth grounding disconnecting switch is connected with one end of the second voltage transformer unit, and the other end of the eighth grounding disconnecting switch is grounded;
the third bus voltage transformer bay comprises: the two ends of the ninth isolating switch are respectively connected with one end of the third voltage transformer unit and the third bus bar, one end of the ninth grounding switch is connected with one end of the third voltage transformer unit, and the other end of the ninth grounding switch is grounded.
6. Main wiring structure of a substation according to claim 1,
said first incoming line main transformer bay comprising: a first transformer, a first voltage transformer, a first lightning arrester, a fourth circuit breaker, a tenth isolating switch, an eleventh isolating switch, a twelfth isolating switch, a tenth grounding disconnecting link, an eleventh grounding disconnecting link, a twelfth grounding disconnecting link, a seventh current transformer and an eighth current transformer, wherein one end of the tenth isolating switch is respectively connected with one ends of the first transformer, the first voltage transformer, the first lightning arrester and the tenth grounding disconnecting link, the other end of the tenth isolating switch is connected with one end of the fourth circuit breaker and one end of the eleventh grounding disconnecting link, the other end of the fourth circuit breaker is respectively connected with one end of the eleventh isolating switch, one end of the twelfth isolating switch and one end of the twelfth grounding disconnecting link, and the other end of the eleventh isolating switch is connected with the first bus bar, the other end of the twelfth disconnecting switch is connected with the second bus bar, the other end of the tenth grounding disconnecting link, the other end of the eleventh grounding disconnecting link and the other end of the twelfth grounding disconnecting link are grounded, and the seventh current transformer and the eighth current transformer are respectively connected in series at two ends of the fourth circuit breaker;
said second incoming line main transformer bay comprising: a second transformer, a second voltage transformer, a second lightning arrester, a fifth circuit breaker, a thirteenth disconnecting switch, a fourteenth disconnecting switch, a fifteenth disconnecting switch, a thirteenth grounding switch, a fourteenth grounding switch, a fifteenth grounding switch, a ninth current transformer and a tenth current transformer, wherein one end of the thirteenth disconnecting switch is connected with one ends of the second transformer, the second voltage transformer, the second lightning arrester and the thirteenth grounding switch respectively, the other end of the thirteenth disconnecting switch is connected with one end of the fifth circuit breaker and one end of the fourteenth grounding switch, the other end of the fifth circuit breaker is connected with one end of the fourteenth disconnecting switch, one end of the fifteenth disconnecting switch and one end of the fifteenth grounding switch respectively, and the other end of the fourteenth disconnecting switch is connected with the second bus bar, the other end of the fifteenth isolating switch is connected with the third bus bar, the other end of the thirteenth grounding disconnecting link, the other end of the fourteenth grounding disconnecting link and the other end of the fifteenth grounding disconnecting link are grounded, and the ninth current transformer and the tenth current transformer are respectively connected in series at two ends of the fifth circuit breaker;
the third incoming main transformer bay comprises: a third transformer, a third voltage transformer, a third lightning arrester, a sixth circuit breaker, a sixteenth isolating switch, a seventeenth isolating switch, an eighteenth isolating switch, a sixteenth grounding switch, a seventeenth grounding switch, an eighteenth grounding switch, an eleventh current transformer and a twelfth current transformer, wherein one end of the sixteenth isolating switch is respectively connected with one ends of the third transformer, the third voltage transformer, the third lightning arrester and the sixteenth grounding switch, the other end of the sixteenth isolating switch is connected with one end of the sixth circuit breaker and one end of the seventeenth grounding switch, the other end of the sixth circuit breaker is respectively connected with one end of the seventeenth isolating switch, one end of the eighteenth isolating switch and one end of the eighteenth grounding switch, and the other end of the seventeenth isolating switch is connected with the first bus bar, the other end of the eighteenth isolating switch is connected with the third bus bar, the other end of the sixteenth grounding disconnecting link, the other end of the seventeenth grounding disconnecting link and the other end of the eighteenth grounding disconnecting link are all grounded, and the eleventh current transformer and the twelfth current transformer are respectively connected with two ends of the sixth circuit breaker in series.
7. The primary wiring structure of a substation according to claim 1, wherein the outlet intervals comprise: the system comprises an outgoing line, a seventh circuit breaker, a nineteenth disconnecting switch, a twentieth disconnecting switch, a twenty-first disconnecting switch, a fourth voltage transformer, a fourth lightning arrester, a nineteenth grounding disconnecting link, a twentieth grounding disconnecting link, a twenty-first grounding disconnecting link, a thirteenth current transformer and a fourteenth current transformer; one end of the nineteenth isolating switch is connected with one end of the outgoing line, one end of the fourth voltage transformer, one end of the fourth lightning arrester and one end of the nineteenth grounding disconnecting link respectively, the other end of the nineteenth isolating switch is connected with one end of the seventh circuit breaker and one end of the twentieth grounding disconnecting link, the other end of the seventh circuit breaker is connected with one end of the twentieth isolating switch, one end of the twenty-first isolating switch and one end of the twenty-first grounding disconnecting link respectively, the other end of the twentieth isolating switch is connected with the first bus bar, the second bus bar or the third bus bar, the other end of the twenty-first isolating switch is connected with the first bus bar, the second bus bar or the third bus bar, and the twentieth isolating switch and the twenty-first isolating switch are connected with different bus bars, the other end of nineteenth earthing knife-switch, the other end of twentieth earthing knife-switch and the other end of twenty-first earthing knife-switch all ground connection, thirteenth current transformer with the fourteenth current transformer is established ties respectively the both ends of seventh circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864551A (en) * | 2020-07-06 | 2020-10-30 | 国网宁夏电力有限公司检修公司 | Main wiring structure of transformer substation |
| CN113991496A (en) * | 2021-10-29 | 2022-01-28 | 广东电网有限责任公司 | High-voltage distribution pole upper integrated device |
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2020
- 2020-07-06 CN CN202021304029.6U patent/CN212485806U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864551A (en) * | 2020-07-06 | 2020-10-30 | 国网宁夏电力有限公司检修公司 | Main wiring structure of transformer substation |
| CN111864551B (en) * | 2020-07-06 | 2024-05-17 | 国网宁夏电力有限公司检修公司 | Main wiring structure of transformer substation |
| CN113991496A (en) * | 2021-10-29 | 2022-01-28 | 广东电网有限责任公司 | High-voltage distribution pole upper integrated device |
| CN113991496B (en) * | 2021-10-29 | 2023-06-27 | 广东电网有限责任公司 | Integrated device on high-voltage distribution column |
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