CN221040741U - Three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure - Google Patents
Three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure Download PDFInfo
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- CN221040741U CN221040741U CN202322515757.1U CN202322515757U CN221040741U CN 221040741 U CN221040741 U CN 221040741U CN 202322515757 U CN202322515757 U CN 202322515757U CN 221040741 U CN221040741 U CN 221040741U
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- 229910000976 Electrical steel Inorganic materials 0.000 description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application provides a three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure, which comprises: three-phase high-voltage shunt reactor, terminal box, high-voltage sleeve and neutral sleeve; the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box is arranged on one side of the oil tank; the high-voltage sleeve and the neutral point sleeve are arranged at the end part of the oil tank; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, the maximum distance between the A phase and the C phase is 9.2m, the arrangement structure of the three-phase high-voltage shunt reactor is reduced in use of a neutral point sleeve compared with that of the single-phase high-voltage shunt reactor, the use of a terminal box can be reduced, and the three-phase integrated arrangement structure is adopted, so that the problem of large arrangement occupied area of the single-phase high-voltage shunt reactor is solved.
Description
Technical Field
The application relates to the field of electric power, in particular to a three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure.
Background
In the ultra-high voltage power transmission and transformation project, in order to weaken the capacitance effect in the no-load or load circuit, reduce the power frequency transient overvoltage and the like, the ultra-high voltage cable project needs to be provided with high-voltage shunt reactors at two sides of the circuit.
When a large number of ultra-high voltage cable lines are needed to be newly built or a large number of overhead lines are needed to be landed, a high-voltage shunt reactor is needed to be additionally arranged in a newly built transformer substation, a compensation station or a reconstruction transformer substation.
In the ultra-high voltage power transmission and transformation engineering, the single-phase high voltage shunt reactor is widely applied, but the newly built transformer substation, the compensation station and the like face the problems of shortage of land, difficult site selection and the like, the original transformer substation is difficult to expand in new sign land, the single-phase high voltage shunt reactor is adopted, the occupied area is large, and the fire-fighting hidden danger is easy to occur.
Disclosure of utility model
The application provides a three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure, which aims to solve the problem that the single-phase high-voltage shunt reactor is large in arrangement occupied area.
In a first aspect, the present application provides a three-phase integrated high voltage shunt reactor arrangement comprising: three-phase high-voltage shunt reactor, terminal box, high-voltage sleeve and neutral sleeve; the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box is arranged on one side of the oil tank; the high-voltage sleeve and the neutral point sleeve are arranged at the end part of the oil tank; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, wherein the maximum distance between the A phase and the C phase is 9.2m.
Compared with a single-phase high-voltage shunt reactor, the three-phase high-voltage shunt reactor has the advantages that neutral point bushings are reduced, the use of a terminal box is reduced, and the occupied area can be saved by adopting a three-phase integrated arrangement structure.
Optionally, the structure further comprises an oil pit, the three-phase high-voltage shunt reactor is erected on the oil pit, and the B phase is coaxial with the oil pit.
The single-phase shunt reactor needs to be arranged continuously, and each phase is provided with an oil pit independently.
Optionally, the structure further comprises an oil storage cabinet, wherein the oil storage cabinet is arranged on the three-phase high-voltage shunt reactor, and the oil storage cabinet is coaxial with the oil pit.
Optionally, the structure further comprises a fire sand prevention pool, and the fire sand prevention pool is arranged at the bottom of the three-phase high-voltage shunt reactor.
Optionally, the structure further comprises a high-impedance control cabinet, and the high-impedance control cabinet is electrically connected with the three-phase high-voltage shunt reactor.
Three high-resistance control cabinets are needed to be arranged for the three single-phase shunt reactors, and only one high-resistance control cabinet is needed to be arranged for the three-phase high-voltage shunt reactors.
Optionally, the structure further comprises an oil on-line monitoring device, and the oil on-line monitoring device is connected with the three-phase high-voltage shunt reactor.
Three on-line monitoring devices are needed to be arranged for the three single-phase shunt reactors, and only one on-line monitoring device is needed to be arranged for the three-phase high-voltage shunt reactors.
In a second aspect, the present application also provides a substation arrangement comprising: a plurality of reactor groups; each reactor group comprises a first high-voltage-resistance outgoing line, a second high-voltage-resistance outgoing line, a third high-voltage-resistance outgoing line and the three-phase integrated high-voltage parallel reactor arrangement structure according to any one of the first aspect, wherein the first high-voltage-resistance outgoing line, the second high-voltage-resistance outgoing line and the third high-voltage-resistance outgoing line are respectively connected with the three-phase high-voltage parallel reactors, and the three-phase high-voltage parallel reactors are equidistantly arranged.
According to the technical scheme, the application provides a three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure, which comprises the following components: three-phase high-voltage shunt reactor, terminal box, high-voltage sleeve and neutral sleeve; the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box is arranged on one side of the oil tank; the high-voltage sleeve and the neutral point sleeve are arranged at the end part of the oil tank; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, wherein the maximum distance between the A phase and the C phase is 9.2m, the arrangement structure of the three-phase high-voltage shunt reactor is reduced in use of a neutral point sleeve compared with that of the single-phase high-voltage shunt reactor, the use of a terminal box can be reduced, and the three-phase integrated arrangement structure is adopted, so that the problem of large arrangement occupied area of the single-phase high-voltage shunt reactor is solved.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a front view of a three-phase integrated high-voltage shunt reactor arrangement shown in an exemplary embodiment;
Figure 2 is a side view of a three-phase, integrated high voltage shunt reactor arrangement shown in an exemplary embodiment;
Fig. 3 is a top view of a three-phase integrated high voltage shunt reactor arrangement shown in an exemplary embodiment;
fig. 4 is a top view of a single-phase high-voltage shunt reactor arrangement shown in an exemplary embodiment;
FIG. 5 is a schematic diagram of a substation configuration shown in an exemplary embodiment;
Fig. 6 is a flow chart of determining an arrangement.
Illustration of:
Wherein, 100-high voltage sleeve, 200-terminal box, 300-neutral point sleeve, 400-oil pit, 500-oil storage cabinet.
Detailed Description
Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the application. Merely exemplary of systems and methods consistent with aspects of the application as set forth in the claims.
In the ultra-high voltage power transmission and transformation project, in order to weaken the capacitance effect in the no-load or load circuit, reduce the power frequency transient overvoltage and the like, the ultra-high voltage cable project needs to be provided with high-voltage shunt reactors at two sides of the circuit. When a large number of ultra-high voltage cable lines are needed to be newly built or a large number of overhead lines are needed to be landed, a high-voltage shunt reactor is needed to be additionally arranged in a newly built transformer substation, a compensation station or a reconstruction transformer substation. In the ultra-high voltage power transmission and transformation engineering, the single-phase high voltage shunt reactor is widely applied, but the newly built transformer substation, the compensation station and the like face the problems of shortage of land, difficult site selection and the like, the original transformer substation is difficult to expand in new sign land, the single-phase high voltage shunt reactor is adopted, the occupied area is large, and the fire-fighting hidden danger is easy to occur.
Referring to fig. 1 to 3, fig. 1 is a front view of a three-phase integrated high-voltage shunt reactor arrangement structure shown in an exemplary embodiment, fig. 2 is a side view of a three-phase integrated high-voltage shunt reactor arrangement structure shown in an exemplary embodiment, and fig. 3 is a top view of a three-phase integrated high-voltage shunt reactor arrangement structure shown in an exemplary embodiment; some embodiments of the present application provide a three-phase integrated high-voltage shunt reactor arrangement structure, including: a three-phase high-voltage shunt reactor, a terminal box 200, a high-voltage bushing 100, and a neutral bushing 300; the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box 200 is arranged at one side of the oil tank; the high-voltage bushing 100 and the neutral bushing 300 are provided at the tank end; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, wherein the maximum distance between the A phase and the C phase is 9.2m.
Referring to fig. 6, firstly, technical parameters, weight, installation and experiment of single-phase and three-phase high-voltage shunt reactors are compared, and then, analysis is performed on aspects of electrical arrangement, civil engineering interfaces, fire protection and the like, so that the transformer substation is built or expanded for different types; in this embodiment, the 330kV 90mvar high-voltage shunt reactors are taken as examples, and are all reactor neutral points directly grounded systems, please refer to table 1.
Table 1 parameter comparison table for three-phase high-voltage shunt reactor and three single-phase shunt reactors
As can be seen from table 1, the three-phase high-voltage shunt reactor and the single-phase reactor have substantially the same performance parameters, but have large differences in weight,
When three single-phase parallel reactors are arranged continuously, each phase uses one high-voltage sleeve 100, three neutral point sleeves 300, and the three-phase high-voltage parallel reactors provided by the embodiment totally need three high-voltage sleeves 100 and one neutral point sleeve 300, compared with the continuous arrangement of three single-phase parallel reactors, two neutral point sleeves 300 are saved, sleeve buses are saved at the same time when two neutral point sleeves 300 are saved, and tubular buses 24.85m can be saved.
In some embodiments, the structure further comprises an oil pit 400, an oil storage cabinet 500, a high-resistance control cabinet and an on-line monitor, the three-phase high-voltage shunt reactor is erected on the oil pit 400, the B phase is coaxial with the oil pit 400, the oil storage cabinet 500 is arranged on the three-phase high-voltage shunt reactor, the oil storage cabinet 500 is coaxial with the oil pit 400, the fire-fighting sand pool is arranged at the bottom of the three-phase high-voltage shunt reactor, the structure further comprises the high-resistance control cabinet, the high-resistance control cabinet is electrically connected with the three-phase high-voltage shunt reactor, and the on-line monitor is connected with the three-phase high-voltage shunt reactor.
The end cables of the three high-voltage bushings 100 can be connected through copper bars, led out to the neutral point bushing 300 through lead cables, and can be fixed through insulating screws for protecting the copper bars, and insulating paper boards can be further added outside the copper bars.
When three single-phase shunt reactors are arranged in succession, an oil pit 400, an oil storage cabinet 500, a high-resistance control cabinet and an on-line monitor are required to be arranged every time, but the three-phase high-voltage shunt reactors provided by the embodiment are arranged on one reactor body in parallel, only one oil pit 400 is required to be arranged, one oil storage cabinet 500, one high-resistance control cabinet and one on-line monitor are required to be arranged, equipment cost is reduced while equipment cost is saved, and in addition, the installation speed can be accelerated due to equipment reduction, and the efficiency is improved.
Referring to fig. 4, fig. 4 is a top view of a single-phase high-voltage shunt reactor according to an exemplary embodiment, it can be seen that when three single-phase shunt reactors are continuously arranged, three oil pits 400 are required to be disposed, the size of each oil pit 400 is 7.5×7.5m, the size of each oil pit 400 provided in the embodiment is 12×9m, although the size of each oil pit 400 provided in the embodiment is larger than that of the oil pit 400 in fig. 4, three oil pits 400 are required to be disposed in fig. 4, the size of each oil pit 400 is 22.5×7.5m, and the size of each oil pit 400 is the largest part of the arrangement structure of the reactors, so that the size of each oil pit 400 determines the occupied area of the reactors, and the occupied area of the three single-phase shunt reactors when continuously arranged is larger than that of the three-phase high-voltage shunt reactors, so that the occupied area of the three single-phase shunt reactors is about 55.2% is saved.
In addition, when the single-phase shunt reactors are continuously arranged, a firewall is required to be arranged between the two single-phase shunt reactors in order to reduce fire hazards, and the thickness of the firewall is 2.5m, so that the occupied area is increased, and the firewall is not required to be arranged between each phase of the three-phase high-voltage shunt reactors provided in the embodiment, so that the occupied area is reduced.
Each phase of the three single-phase shunt reactors is separately provided with one terminal box 200, secondary wiring is required to be connected into the high-impedance control cabinet through phase B junction control, wiring is complex, the probability of faults is increased easily under the condition of complex wiring, and the three-phase high-voltage shunt reactors provided by the embodiment are only provided with one high-impedance control cabinet, so that the secondary wiring is simplified compared with the single-phase shunt reactors, intermediate wiring and potential fault points are reduced, the reliability of the secondary wiring can be improved, the cable path is optimized, and the cables are saved by about 30%.
And, wires, silicon steel sheets, insulating oil, and steel sheets are required to be used in the installation process, see table 2;
Table 2 weight comparison table of three-phase high-voltage shunt reactor and three single-phase shunt reactors
As can be seen from table 2, the three-phase high-voltage shunt reactor has a saving of 5.7 tons of wires, about 35.8% of silicon steel sheets, insulating oil and steel plates compared with the three single-phase high-voltage shunt reactors; 2.1 tons of silicon steel sheets are saved, and about 6.67 percent of silicon steel sheets are saved; 10.8 tons of insulating oil is saved, and about 23.84 percent is saved; the steel plate is saved by 10 tons, and the steel plate is saved by about 33.33 percent. The three-phase high-voltage shunt reactor effectively reduces the equipment cost, and the total weight and the transportation weight are obviously reduced compared with those of a single phase. Therefore, the three-phase high-voltage shunt reactor has better economical efficiency, obvious energy-saving and consumption-reducing effects and small occupied area compared with the single-phase high-voltage shunt reactor.
Compared with three single-phase high-voltage parallel reactors, the method has the advantages that secondary wiring is simplified, intermediate wiring and potential fault points are reduced, cables are saved by about 30%, and when the method is used for mounting, the mounting and testing period of the three-phase high-voltage parallel reactors is about 12-15 days, and the mounting and testing period of the 3 single-phase high-voltage parallel reactors is about 40-45 days. The three-phase parallel high-voltage reactor has a period of 66% of the installation period and the test period of the parallel high-voltage reactor compared with the single-phase high-voltage parallel reactor, and can shorten the engineering construction period and improve the efficiency.
In some embodiments, the cooling device is arranged outside the three-phase high-voltage shunt reactor and can be arranged on two sides of the oil storage cabinet 500 through the fixing support.
The three-phase high-voltage shunt reactor arrangement structure provided by the embodiment has flexible and various application scenes, can be used for new transformer substation (compensation station) engineering, can be used for the combined construction of the original transformer substation extension engineering and the original transformer substation, can be used for an indoor transformer substation by replacing the three-phase high-voltage shunt reactor air sleeve with the oil-gas sleeve, and greatly reduces the occupied area of the indoor transformer substation. Meanwhile, technical support can be provided for the cable landing in the city, so that urban land resource conservation and intensive utilization are realized.
Based on the above-mentioned three-phase integrated high-voltage shunt reactor arrangement structure, some embodiments of the present application further provide a transformer substation arrangement structure, referring to fig. 5, fig. 5 is a schematic diagram of a transformer substation arrangement structure shown in an exemplary embodiment, where the transformer substation arrangement structure includes: a plurality of reactor groups; each reactor group comprises a first high-voltage-resistance outgoing line, a second high-voltage-resistance outgoing line, a third high-voltage-resistance outgoing line and the three-phase integrated high-voltage parallel reactor arrangement structure, wherein the first high-voltage-resistance outgoing line, the second high-voltage-resistance outgoing line and the third high-voltage-resistance outgoing line are respectively connected with the three-phase high-voltage parallel reactors, and the three-phase high-voltage parallel reactors are equidistantly arranged.
Illustratively, each reactor group includes a first high-voltage outlet, a second high-voltage outlet, and a third high-voltage outlet, referring to fig. 5, a phase a high-voltage outlet, a phase B high-voltage outlet, and a phase C high-voltage outlet, each reactor group includes three-phase high-voltage shunt reactor arrangements, and the high-voltage bushings 100 in the three-phase high-voltage shunt reactor arrangements are divided into a phase a high-voltage bushing, a phase B high-voltage bushing, and a phase C high-voltage bushing, the phase a high-voltage outlet is connected with the phase a high-voltage bushing, the phase B high-voltage outlet is connected with the phase B high-voltage bushing, and the phase C high-voltage outlet is connected with the phase C high-voltage bushing.
The transformer substation arrangement structure can also comprise a radiator, wherein a paralleling reactor oil outlet pipeline and a paralleling reactor oil inlet pipeline are connected between the radiator and the three-phase high-voltage paralleling reactor; the number of the radiators can be one or more, and the number of the radiators can be set according to the capacity configuration of the three-phase high-voltage shunt reactor; the radiator may be integrated or split, and the type of the radiator may be set according to the capacity configuration of the three-phase high-voltage shunt reactor.
The whole transformer substation arrangement structure is rectangular, the 330kV three-phase high-voltage shunt reactor is arranged in a line shape in the middle of a transformer substation area, 330kV lines are led in from the upper side in fig. 5, and cables are led out from the left side in fig. 5 of the transformer substation. The substation distribution device adopts an outdoor AIS medium-sized distribution device.
In some embodiments, the spacing of the two reactor groups is less than the spacing of the two three-phase high voltage shunt reactors. Illustratively, with continued reference to fig. 5, the outgoing line 1, the outgoing line 2, and the outgoing line 3 are taken as one reactor group, the outgoing line 4, the outgoing line 5, and the outgoing line 6 are taken as one reactor group, the outgoing line 1 is connected with one three-phase high-voltage parallel reactor, the distance between the two three-phase high-voltage parallel reactors is 18m, and the distance between the two reactor groups is 13m.
As can be seen from the above technical solutions, the embodiments of the present application provide a three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure, where the three-phase integrated high-voltage shunt reactor arrangement structure includes: a three-phase high-voltage shunt reactor, a terminal box 200, a high-voltage bushing 100, and a neutral bushing 300; the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box 200 is arranged at one side of the oil tank; the high-voltage bushing 100 and the neutral bushing 300 are provided at the tank end; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, the maximum distance between the A phase and the C phase is 9.2m, compared with the single-phase high-voltage shunt reactor, the three-phase high-voltage shunt reactor has the advantages that the neutral point sleeve 300 is reduced, the use of the terminal box 200 can be reduced, and the problem that the arrangement occupied area of the single-phase high-voltage shunt reactor is large is solved through parallel connection.
The above-provided detailed description is merely a few examples under the general inventive concept and does not limit the scope of the present application. Any other embodiments which are extended according to the solution of the application without inventive effort fall within the scope of protection of the application for a person skilled in the art.
Claims (7)
1. A three-phase integrated high voltage shunt reactor arrangement, comprising: a three-phase high-voltage shunt reactor, a terminal box (200), a high-voltage sleeve (100) and a neutral point sleeve (300); the three-phase high-voltage shunt reactor is provided with an oil tank, and the terminal box (200) is arranged on one side of the oil tank; the high-voltage bushing (100) and the neutral bushing (300) are arranged at the end part of the oil tank; the three-phase high-voltage shunt reactor comprises an A phase, a B phase and a C phase, wherein the maximum distance between the A phase and the C phase is 9.2m.
2. The three-phase integrated high-voltage shunt reactor arrangement according to claim 1, characterized in that the arrangement further comprises an oil sump (400), the three-phase high-voltage shunt reactor being mounted on the oil sump (400), the B-phase being coaxial with the oil sump (400).
3. The three-phase integrated high-voltage shunt reactor arrangement according to claim 2, characterized in that the arrangement further comprises an oil reservoir (500), the oil reservoir (500) being provided on the three-phase high-voltage shunt reactor, the oil reservoir (500) being coaxial with the oil sump (400).
4. The three-phase integrated high-voltage shunt reactor arrangement according to claim 1, characterized in that the arrangement further comprises a fire sand pool arranged at the bottom of the three-phase high-voltage shunt reactor.
5. The three-phase integrated high voltage shunt reactor arrangement according to claim 1, characterized in that the arrangement further comprises a high reactance control cabinet electrically connected with the three-phase high voltage shunt reactor.
6. The three-phase integrated high voltage shunt reactor arrangement according to claim 1, characterized in that the arrangement further comprises an oil on-line monitoring device connected with the three-phase high voltage shunt reactor.
7. A substation arrangement, comprising: a plurality of reactor groups; each reactor group comprises a first high-voltage-resistance outgoing line, a second high-voltage-resistance outgoing line, a third high-voltage-resistance outgoing line and the three-phase integrated high-voltage shunt reactor arrangement structure according to any one of claims 1 to 6, wherein the first high-voltage-resistance outgoing line, the second high-voltage-resistance outgoing line and the third high-voltage-resistance outgoing line are respectively connected with an A phase, a B phase and a C phase of the three-phase high-voltage shunt reactor, and the three-phase high-voltage shunt reactors are equidistantly arranged.
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| CN202322515757.1U CN221040741U (en) | 2023-09-15 | 2023-09-15 | Three-phase integrated high-voltage shunt reactor and transformer substation arrangement structure |
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