阅读说明：本技术 一种110kv城市变电站布置系统 (110kv urban transformer substation arrangement system ) 是由 雷翔胜 王彦峰 王兴华 吴小蕙 王向兵 隋宇 王浩 聂独 王炽欣 王冯彦 吴玉荣 于 2021-07-02 设计创作，主要内容包括：本发明公开了一种110kv城市变电站布置系统,包括：变电站,变电站包括多个子站,多个子站之间采用全绝缘浇注母线或电缆通过地上或地下敷设,其中,电缆包括光纤智能监测电力电缆,光纤智能监测电力电缆用于监测电缆温度；多个子站包括110kv配电装置,若多个子站之间110kv配电装置采用线变组接线型式时,不同子站中的110kv配电装置之间没有电气连接,若多个所述子站之间110kv配电装置采用单母线分段接线型式时,不同子站中的110kv配电装置之间采用110kV交联聚乙烯绝缘电力电缆电气连接。本发明将一个变电站拆为多个子站,每个子站都具体独立的供电能力,提高供电的效率以及减少土地资源的占用。(The invention discloses a 110kv urban substation layout system, which comprises: the transformer substation comprises a plurality of substations, and all-insulation pouring buses or cables are laid on the ground or underground among the substations, wherein the cables comprise optical fiber intelligent monitoring power cables which are used for monitoring the temperature of the cables; the plurality of sub-stations comprise 110kV power distribution devices, if the 110kV power distribution devices among the plurality of sub-stations adopt a line-to-line group wiring type, the 110kV power distribution devices in different sub-stations are not electrically connected, and if the 110kV power distribution devices among the plurality of sub-stations adopt a single-bus sectional wiring type, the 110kV power distribution devices in different sub-stations are electrically connected by adopting a 110kV crosslinked polyethylene insulated power cable. According to the invention, one transformer substation is disassembled into a plurality of sub-stations, and each sub-station has specific and independent power supply capacity, so that the power supply efficiency is improved and the land resource occupation is reduced.)

1. A110 kv urban substation layout system, comprising: the transformer substation comprises a plurality of substations, and all-insulation pouring buses or cables are laid on the ground or underground among the substations, wherein the cables comprise optical fiber intelligent monitoring power cables which are used for monitoring the temperature of the cables;

the plurality of sub-stations comprise 110kV power distribution devices, if the 110kV power distribution devices among the plurality of sub-stations adopt a line-to-line group wiring type, the 110kV power distribution devices in different sub-stations are not electrically connected, and if the 110kV power distribution devices among the plurality of sub-stations adopt a single-bus sectional wiring type, the 110kV power distribution devices in different sub-stations are electrically connected by 110kV crosslinked polyethylene insulated power cables.

2. The 110kv urban substation layout system according to claim 1, further comprising: the transformer substation comprises a cable trench and a pipe trench, wherein the cable trench and the pipe trench are used for bearing the transformer substation and a plurality of connecting wires between the substations, the cable trench and the pipe trench are provided with ground beam type trenches, and uniformly distributed ground beams are arranged on bottom plates of the ground beam type trenches.

3. A 110kv urban substation layout system according to claim 2, characterized in that the 110kv distribution equipment is provided using indoor GIS equipment, which comprises a plurality of GIS rooms.

4. A 110kv urban substation layout system according to claim 3, wherein the plurality of substations further comprises a main transformer and a 10kv power distribution device, the 110kv power distribution device is connected with the main transformer and the 10kv power distribution device for voltage reduction.

5. The 110kv urban substation layout system according to claim 4, wherein the main transformer and 10kv power distribution device comprise a transformer and a 10kv power distribution device, the transformer adopts outdoor layout, and the 10kv power distribution device adopts single-bus double-section wiring.

6. The 110kv urban substation layout system according to claim 5, wherein the plurality of substations further comprises a 10kv capacitor bank, the 10kv capacitor bank being connected with the 110kv power distribution device and the main transformer and 10kv power distribution device, respectively, for maintaining voltage stability.

7. The 110kv urban substation layout system according to claim 6, further comprising a 10kv switchgear, wherein the 10kv switchgear is connected with the 10kv capacitor bank by a power cable.

8. The 110kv urban substation layout system according to claim 7, wherein the plurality of the sub-stations further comprises station consumers, and the station consumers and the main transformer are connected with a 10kv power distribution device for reducing the voltage of the sub-stations to 220V.

9. The 110kv urban substation layout system according to claim 8, wherein the station power utilization device comprises an ATS intelligent switch, an intelligent monitor, a 3kVA inverter device and a switching device, the ATS intelligent switch is connected with the intelligent monitor, and the intelligent monitor is connected with the 3kVA inverter device and the switching device.

10. The 110kv urban substation layout system according to claim 1, comprising: the planar dimensions of the plurality of substations are 25.2m × 20 m.

Technical Field

The invention relates to the technical field of transformer substation design, in particular to a 110kv urban transformer substation layout system.

Background

With the increasing tension of land use indexes, the improvement of environmental evaluation requirements and the improper repulsions of residents on substations, the site selection of newly-built sites is increasingly difficult, the sites of some substations cannot be determined for years, so that the development of power production and local economy has a plurality of uncertain negative effects, for the built areas, if a newly-built substation is required due to the increase of load density and other reasons, the site selection difficulty is increased remarkably, if the difference of peripheral topography caused by longer size of an enclosing wall is considered, a side slope/retaining wall, a drainage ditch and the like are required to be arranged outside the substation, the actual occupied area of the substation is increased by about 20%, in the stage of high-speed development and earth deposit of the current city, the complete land blocks are provided for the substations to be more and more difficult to construct, and after the existing scheme is highly standardized, corresponding equipment is produced, customized and modularized, if the land can not meet the construction requirements of the transformer substation, the construction scheme of the corresponding whole transformer substation is difficult to adjust.

Disclosure of Invention

The invention aims to provide a 110kv urban substation layout system to solve the problem of large occupied area of the existing substation.

In order to achieve the above object, the present invention provides a 110kv urban substation layout system, comprising: the transformer substation comprises a plurality of substations, and all-insulation pouring buses or cables are laid on the ground or underground among the substations, wherein the cables comprise optical fiber intelligent monitoring power cables which are used for monitoring the temperature of the cables;

the plurality of sub-stations comprise 110kV power distribution devices, if the 110kV power distribution devices among the plurality of sub-stations adopt a line-to-line group wiring type, the 110kV power distribution devices in different sub-stations are not electrically connected, and if the 110kV power distribution devices among the plurality of sub-stations adopt a single-bus sectional wiring type, the 110kV power distribution devices in different sub-stations are electrically connected by 110kV crosslinked polyethylene insulated power cables.

Preferably, the 110kv urban substation layout system further includes: the transformer substation comprises a cable trench and a pipe trench, wherein the cable trench and the pipe trench are used for bearing the transformer substation and a plurality of connecting wires between the substations, the cable trench and the pipe trench are provided with ground beam type trenches, and uniformly distributed ground beams are arranged on bottom plates of the ground beam type trenches.

Preferably, the 110kv power distribution apparatus is arranged using an indoor GIS device, which includes a plurality of GIS rooms.

Preferably, the plurality of substations further comprises a main transformer and a 10kv power distribution device, and the 110kv power distribution device is connected with the main transformer and the 10kv power distribution device for voltage reduction.

Preferably, the main transformer and the 10kv power distribution device comprise a transformer and the 10kv power distribution device, wherein the transformer is arranged outdoors, and the 10kv power distribution device adopts single-bus double-section wiring.

Preferably, the plurality of substations further comprises a 10kv capacitor bank, and the 10kv capacitor bank is respectively connected with the 110kv power distribution device and the main transformer and the 10kv power distribution device for maintaining the stability of voltage.

Preferably, the 110kv urban substation layout system further comprises a 10kv switch cabinet, and the 10kv switch cabinet is connected with the 10kv capacitor bank by adopting a power cable.

Preferably, the plurality of the sub-stations further comprise station electric devices, and the station electric devices and the main transformer are connected with a 10kv power distribution device and used for reducing the voltage of the sub-stations to 220V.

Preferably, the station power utilization device comprises an ATS intelligent switch, an intelligent monitor, a 3kVA inverter device and a switching device, wherein the ATS intelligent switch is connected with the intelligent monitor, and the intelligent monitor is connected with the 3kVA inverter device and the switching device.

Preferably, the 110kv urban substation layout system comprises: the planar dimensions of the plurality of substations are 25.2m × 20 m.

According to the invention, the transformer is split into a plurality of sub-stations, the sub-stations comprise a 110kv power distribution device, a main transformer, a 10kv power distribution device and a station power utilization device, wherein the output voltage is supplied for residents to use, and meanwhile, the transformer substation is split into a plurality of sub-stations, so that the adaptability of the transformer substation to terrain limitation is improved, and the urban occupied resource area is reduced.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a 110kv urban substation layout system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a cable trench according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a substation provided by yet another embodiment of the present invention;

FIG. 4 is a schematic diagram of a substation according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a substation according to another embodiment of the present invention.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the step numbers used herein are for convenience of description only and are not used as limitations on the order in which the steps are performed.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a 110kv urban substation layout system, including: the substation 100 comprises a plurality of substations 110, all-insulation pouring buses or cables are laid on the ground or underground among the substations 110, wherein the cables comprise optical fiber intelligent monitoring power cables, the optical fiber intelligent monitoring power cables are used for monitoring the temperature of the cables, the substations 110 comprise 110kV power distribution devices 10, if the 110kV power distribution devices 10 among the substations 110 adopt a line-to-line group wiring type, no electrical connection exists among the 110kV power distribution devices 10 in different substations 110, and if the 110kV power distribution devices 10 among the substations 110 adopt a single-bus-bar section wiring type, the 110kV power distribution devices 10 in different substations 110 are electrically connected by 110kV crosslinked polyethylene insulation power cables.

Specifically, because urban land is short, the distributed substation has the greatest advantage of flexibility in planar arrangement, one substation 100 can be split into a plurality of substations 110, each substation 110 is a set of power supply facility with relatively complete functions, each substation 110 is arranged by using scattered and irregular small plots, and the substations 110 are connected with one another through conductors, control cables and optical fibers to form a substation with a larger scale and complete functions without occupying a larger urban land area.

The substation 110 comprises 110kv distribution equipment 10, indoor GIS equipment, cable incoming and cable outgoing by adopting a line-to-line group connection mode, and the plane size of a single GIS room is 8 multiplied by 11.6 m. The size of each substation 110 is 25.2 x 20m, which is close to the size of a square, and is convenient to arrange in different terrains, the high-voltage side connection mode among different substations 110 adopts cable connection, wherein, when the 110kV side of different substations adopts a line transformer bank wiring type, the 110kV power distribution devices 10 in different substations 110 are connected with each other, the 110kV power distribution devices 10 in different substations 110 are not electrically connected, if the 110kV power distribution devices 10 among a plurality of substations 110 adopt a single bus bar subsection wiring type, the 110kV crosslinked polyethylene insulated power cables are electrically connected among the 110kV power distribution devices 10 in different substations 110, the 110kV crosslinked polyethylene insulated power cables generally adopt aluminum-plastic composite sheaths or corrugated aluminum sheaths, and the section of a single-core copper conductor is 240mm²～2000mm²And the current-carrying capacity when the cable is laid in the air at the ambient temperature of 40 ℃ is 550-2000A, so that the engineering requirement of a 110kV power transmission line can be met. When the power cables are laid in parallel, the same cable specification, cable length and laying mode are adopted, the same construction and installation process is adopted for cable head installation, the power cables are intelligently monitored by adopting optical fibers, an optical fiber temperature measuring unit is arranged in each cable, the temperature of each cable is monitored on line through a monitoring background, and when the cables are overheated, the cables are timely checked to eliminate the condition that the cable joints are not contactedAnd the problems of unbalanced distribution of cable current and insufficient current-carrying capacity of a single power cable are solved. If the specifications, lengths, laying modes and contact resistances of cable heads of a plurality of cables connected in parallel in the same phase are different, or the impedances of the cables are different due to the mutual inductance of the long-distance cables, the problem of serious unbalanced current distribution of the cables can occur.

Referring to fig. 2, each substation further includes a cable trench and a pipe trench, the cable trench and the pipe trench are used for bearing connecting wires between the substation and the plurality of substations, the cable trench and the pipe trench are ground beam type trenches, and a bottom plate of the ground beam type trenches is arranged by uniformly distributed ground beams.

Specifically, the cable pit and the trench adopt ground beam type channels, the cable pit and the trench are composed of trench walls, trench bottoms and trench cover plates, a bottom plate of the trench bottom is changed into a uniformly distributed ground beam, the trench is no longer an independent closed space, the trench bottom is communicated with original state soil, heat generated by the cable is communicated with a natural medium through a heat balance principle, and therefore the effect of cooling is achieved.

Further, the 110kv power distribution device 10 is arranged by using indoor GIS equipment 11, the GIS equipment comprises a plurality of GIS rooms, the substation 110 further comprises a main transformer and 10kv power distribution device 20, the 110kv power distribution device 10 is connected with the main transformer and 10kv power distribution device 20 for voltage reduction, the main transformer and 10kv power distribution device 20 comprises a transformer 21 and a 10kv power distribution device 22, the transformer 21 is arranged outdoors, and the 10kv power distribution device 22 adopts single-bus double-section wiring.

Referring to fig. 3, specifically, a plurality of GIS rooms are arranged in the 110kv power distribution device 10, a main transformer and a transformer 21 in the 10kv power distribution device 20 are arranged outdoors, a three-phase double-winding self-cooling on-load voltage regulation power transformer, a low-voltage side 16 return line in each group of the 10kv power distribution device 22 is connected by a single-bus double-section wire, the indoor plane size of the 10kv power distribution device 22 is 11m × 11.6m, and each main transformer and 1 return 110kv line are combined to form an electrical unit.

Referring to fig. 4, further, the plurality of substations 110 further include a 10kv capacitor bank 30, the 10kv capacitor bank 30 is respectively connected to the 110kv power distribution device 10 and the main transformer and the 10kv power distribution device 20 for maintaining voltage stability, the substation 110 further includes a 10kv switch cabinet 40, and the 10kv switch cabinet 40 is connected to the 10kv capacitor bank 30 by a power cable.

Referring to fig. 4, specifically, each main transformer and 10kv power distribution device 20 is provided with 3 groups of 5Mvar capacitor banks, an indoor complete frame type capacitor bank, 9 groups of long-term capacitor banks are arranged in three independent capacitor chambers of ± 0.00m layers, each capacitor chamber is provided with 3 groups of capacitors distributed by a single main transformer, and the plane size of each capacitor chamber is 6 × 10.7 m.

The main transformer and the 10kv power distribution device 20 are arranged outdoors, a fixed fire extinguishing device is not required to be arranged according to corresponding fire-fighting specifications, the building size of the substation is less than 3000 cubic meters, an indoor fire hydrant is not required to be arranged, the applicability is strong, an indoor capacitor bank belongs to one part of the substation, and the substation is connected with a 10kv switch cabinet in the substation through a power cable to form a gas fire-fighting device.

Referring to fig. 5, further, the plurality of substations 110 further include a station power utilization device 50, the station power utilization device 50 is connected to the main transformer and the 10kv power distribution device 20, and is configured to reduce the voltage of the substation 110 to 220V, the station power utilization device 50 includes an ATS intelligent switch 51, an intelligent monitor 52, a 3kVA inverter 53 and a switching device 54, wherein the ATS intelligent switch 51 is connected to the intelligent monitor 52, and the intelligent monitor 52 is connected to the 3kVA inverter 53 and the switching device 54.

Referring to fig. 5, each substation 110 is provided with 380/220V ac screen 3 stations, size: 2260 x 800 x 600mmmm (with ATS intelligent switch 51, intelligent monitor 52, 3kVA inverter 53 and switching device 54).

The transformer is split into a plurality of sub-stations, each sub-station comprises a 110kv power distribution device, a main transformer, a 10kv power distribution device and a station power utilization device, wherein output voltage is supplied for residents, the transformer station is split into a plurality of sub-stations, the adaptability of the transformer station to terrain limitation is improved, the whole transformer station with larger floor area is divided into different areas, and the arrangement limitation of building planes and spans caused by the limitation and arrangement change of land blocks can be adapted by interconnecting all the areas by adopting conductors with large current carrying capacity and good insulating property without influencing urban beauty, so that urban land resources are saved, the sub-stations can be arranged by near different area load centers, and the loss of a transmission line is reduced.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.