CN109244915B

CN109244915B - Miniature integrated transformer substation on post

Info

Publication number: CN109244915B
Application number: CN201710555372.4A
Authority: CN
Inventors: 王钰; 高丰; 陈仲; 王志龙; 杨敬敏; 王华敬; 贾晓静
Original assignee: Beijing Nobbel Electric Tech Develop Co ltd
Current assignee: Beijing Nobbel Electric Tech Develop Co ltd
Priority date: 2017-07-10
Filing date: 2017-07-10
Publication date: 2021-06-22
Anticipated expiration: 2037-07-10
Also published as: CN109244915A

Abstract

The invention discloses a column-mounted miniature integrated transformer substation. The miniature integrated transformer substation on post includes wire pole, transformer, insulating base member, high-pressure part, low pressure part, auxiliary assembly and appurtenance, insulating base member divide into two at least installation cavities, high-pressure part is located high pressure installation cavity or installs on the wall of high pressure installation cavity, low pressure part is located low pressure installation cavity or installs on the wall of low pressure installation cavity, high voltage isolator with low pressure isolator direct mount be in on the insulating base member, insulating base member conduct high voltage isolator with low voltage isolator's base. The on-column miniature integrated substation provided by the invention has the advantages that the mutually independent installation chambers are arranged for the high-voltage side device and the low-voltage side device in the insulating base body, and part of devices are directly installed on the insulating base body, so that the integration level of the on-column substation is greatly improved, and the installation efficiency and the safety are improved.

Description

Miniature integrated transformer substation on post

Technical Field

The invention relates to the technical field of power transmission, in particular to a column-mounted miniature integrated transformer substation. The miniature transformer substation refers to a pole-mounted transformer substation with the voltage grade of 35kV or below, is particularly suitable for a 10kV pole-mounted transformer and supporting facilities thereof, and can also be expanded to other power distribution equipment such as a pole-mounted circuit breaker and the like.

Background

In a power distribution system, when a high-voltage overhead line or a high-voltage cable reaches a load center, a high voltage needs to be converted into a voltage acceptable to a user through a transformer, and the most common voltage is three-phase, namely, the voltage of a high-voltage line is 10kV, and the voltage of a low-voltage line is 380V.

When a high-voltage wire is led down, a drop-out fuse is required to be installed on a telegraph pole to protect overcurrent, and when a fault exists, the fuse acts and an obvious fracture appears. Meanwhile, in order to prevent the overvoltage from invading the transformer, it is necessary to install a lightning arrester between the high voltage and the ground. According to needs, sometimes still need install isolator, convenient maintenance and maintenance work. The high voltage lead enters the transformer.

The low voltage side of the transformer generally passes through a low voltage isolating switch, and is generally provided with a low voltage arrester, and then enters a low voltage overhead line or a low voltage cable to reach a distribution room of a user.

All components, including the transformer, are mounted on poles, either single pole or double pole crossarms. The lead wires also need to be fixed by arranging post insulators.

Meanwhile, a low-voltage distribution box is arranged according to the requirement. If the reactive power of the user is too large or the harmonic wave is serious, a reactive compensation device and a harmonic wave treatment device are required to be configured. Generally, a metering device is required to be configured, so that the work of charging the electric quantity and the like is facilitated. In recent years, due to the development of technology, a telecontrol communication device is often arranged. Most of these devices are independent boxes mounted on the utility pole, and the electric quantity is generally obtained through a current transformer and a voltage transformer, and the arrangement of the signal cable is complicated.

In the pole-mounted transformer substation in the prior art, a plurality of parts are arranged, and the parts are purchased, distributed and transported from the design drawing to the installation on site, and a plurality of links such as supervision, test, acceptance and the like are required during installation. The workload is very large, and great waste is caused to social resources.

The disadvantages of the pole-mounted substation in the prior art are mainly shown in the following:

1. the method has the advantages of complex links, large workload, high overall cost and great social resource waste.

2. The field installation is complex, the cost is high, and the quality is not easy to control;

3. the parts are many and scattered, the lead wires are disordered, and the potential safety hazard is large.

4. Many problems also tend to occur after operation, such as: birds and beasts infested, severe corrosion, and the like.

It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

It is an object of the present invention to provide a pole-mounted miniature integrated substation that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.

In order to achieve the above object, the present invention provides a pole-mounted micro integrated substation, including a utility pole, a transformer, an insulating base, a high-voltage component, a low-voltage component, an accessory device and an accessory fitting, wherein the high-voltage component includes a high-voltage arrester, a high-voltage fuse and a high-voltage disconnector, the low-voltage component includes a low-voltage arrester and a low-voltage disconnector, the accessory device includes all or part of a reactive power compensation device, a metering device and a telecontrol communication device, the insulating base is made of an insulating material, the insulating base is divided into at least two installation chambers, the at least two installation chambers include a high-voltage installation chamber and a low-voltage installation chamber, the high-voltage component is located in the high-voltage installation chamber or is installed on a wall of the high-voltage installation chamber, and the low-voltage component is located in the low-voltage installation chamber or is installed on a, the high-voltage isolating switch and the low-voltage isolating switch are directly installed on the insulating base body, and the insulating base body is used as a base of the high-voltage isolating switch and the low-voltage isolating switch.

Preferably, the at least two mounting chambers further include a transformer chamber, a transformer is arranged in the transformer chamber, and a metal mounting plate is arranged at the bottom of the transformer chamber and fixedly mounted on the telegraph pole.

Preferably, the at least two installation chambers further comprise an auxiliary equipment chamber, and a metering device, a reactive compensation device and a telemechanical communication device are arranged in the auxiliary equipment chamber.

Preferably, the accessory device chamber comprises four sub-chambers: a metering device chamber, a reactive compensation device chamber, a telemechanical communication device chamber, and a fourth chamber, wherein the fourth chamber functions as a distribution box or a backup chamber.

Preferably, a high-voltage lead wire from an overhead line is connected into the insulating base body through an insulating lead wire, passes through the high-voltage fuse, is connected in parallel with the high-voltage arrester between a high-voltage conductor and a grounding body, is connected into a high-voltage bushing of a transformer or is directly connected into a transformer box body through a cable, and is provided with the high-voltage isolating switch before being connected into the transformer; a low-voltage lead of the transformer is led out through a low-voltage sleeve or a cable and is connected to a low-voltage overhead line or a low-voltage cable through a low-voltage component; all leads within the confines of the insulating matrix are embedded within the insulating matrix or routed over the insulating matrix.

Preferably, the high-voltage fuse comprises a hardware fitting and a fuse tube which are fixed on the insulating base body at two ends; the high-voltage fuse is exposed, or an observation window is arranged on the high-voltage installation cavity and used for observing the high-voltage fuse.

Preferably, high voltage isolator and low voltage isolator are including being fixed in link fitting, current conducting plate and the hasp part on the insulating base member, high voltage isolator with low voltage isolator exposes, or sets up the observation window and be used for observing high voltage isolator and low voltage isolator, or high voltage isolator and low voltage isolator's current conducting plate and cavity end cover combine together, and corresponding isolator disconnection when opening the cavity end cover, corresponding isolator is closed when closing the cavity end cover.

Preferably, the insulating matrix is single-phase, or the insulating matrix is a three-phase body, and insulating partition plates are further arranged among the phases.

Preferably, the accessory further comprises a current transformer and a voltage measuring unit, the current transformer and the voltage measuring unit are mounted on or embedded in the insulating base, and signal lines of the current transformer and the voltage measuring unit are embedded in or arranged on the insulating base.

Preferably, the insulating base body is provided with a vertical strip-shaped reinforcing rib

The on-column miniature integrated substation is provided with the mutually independent installation chambers for the high-voltage side device and the low-voltage side device in the insulating base body, and the parts of the devices are directly installed on the insulating base body, so that the integration level of the on-column substation is greatly improved, and the installation efficiency and the safety are improved.

The on-post miniature integrated substation has the advantages that:

1. the whole purchase that realizes integrating, installation and debugging in the factory, the field installation only need hoist and mount in place to and the wiring can, simple and convenient. The overall comprehensive cost is greatly reduced.

2. The appearance is unified neat, elegant appearance, and a lot of complicated lead wires can not be seen from the outside, so that related parts are optimized and integrated, and unnecessary accessory parts such as a post insulator, a base of a disconnecting switch and an insulator thereof, a base of a fuse and a supporting insulator thereof are eliminated.

3. And the occurrence of bird and animal insect pests can be effectively avoided, and the probability of corrosion is reduced.

Drawings

Fig. 1 is a schematic view of a miniature integrated substation on a pole according to an embodiment of the present invention.

Fig. 2 is a schematic view of a miniature integrated substation on a pole according to another embodiment of the present invention.

Figure 3 is a schematic diagram of a fuse in the prior art.

Fig. 4 is a schematic diagram of a fuse in a pole-mounted micro integrated substation of the present invention.

Fig. 5 is a schematic diagram of a prior art isolator switch.

Fig. 6 is a schematic diagram of a disconnector in a miniature integrated substation on a column according to the invention.

Fig. 7 is a schematic view of a miniature integrated substation on a pole according to yet another embodiment of the present invention.

Fig. 8 is a schematic top view of the on-post miniature integrated substation shown in fig. 7.

Reference numerals:

10	insulating matrix	24	Low-voltage isolating switch
				30	Transformer device	25	Low-voltage lightning arrester
40	Flow guiding body	211	Upper static contact
				11	High pressure installation chamber	212	Pressure release cap
12	Low pressure installation chamber	213	Upper moving contact
				13	Metering device chamber	214	Fusion tube
14	Reactive power compensation device chamber	215	Lower moving contact
				15	Telemechanical communication device chamber	216	Lower support
16	Distribution box	217	Insulator
				17	Insulating partition	218	Mounting plate
21	High-voltage fuse	231	Wire inlet plate
				22	High-voltage lightning arrester	232	Wire outlet plate
23	High-voltage isolating switch	233	Cavity end cover

Detailed Description

In the drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.

Fig. 1 is a schematic view of a miniature integrated substation on a pole according to an embodiment of the present invention. The on-post miniature integrated substation shown in fig. 1 comprises: utility poles (not shown), an insulating base 10, a transformer 30, high-voltage components, low-voltage components, accessories, and accessories. It should be noted that the sizes and relative positions of the fuse, the lightning arrester and the disconnector are only illustrative, and the actual sizes, positions and the like can be set as required without departing from the protection scope of the present invention.

The insulating base 10 is made of an insulating material. The insulating material may be any suitable insulating material, for example, a weather-resistant organic insulating material may be used. The insulating base 10 is divided into at least two mounting chambers. The at least two mounting chambers include a high pressure mounting chamber 11 and a low pressure mounting chamber 12. The high-pressure component is located in the high-pressure mounting cavity, and the low-pressure component is located in the low-pressure mounting cavity.

The high voltage components include a high voltage arrester 22, a high voltage fuse 21 and a high voltage disconnector 23. The low-voltage components include a low-voltage arrester 25 and a low-voltage isolating switch 24. The high-voltage component and the low-voltage component can also include other devices, as desired. The high-voltage isolating switch 23 and the low-voltage isolating switch 24 are directly installed on the insulating base 10, and the insulating base 10 serves as a base for the high-voltage isolating switch 23 and the low-voltage isolating switch 24.

The auxiliary equipment comprises all or part of a reactive power compensation device, a metering device and a telecontrol communication device. That is, the accessory equipment includes one or more of a reactive power compensation device, a metering device, and a telemechanical communication device as needed. Furthermore, the accessory device can also include other devices, as desired.

The transformer 30 can be any suitable transformer. For example, the high-voltage line voltage of the transformer 30 is 10kV, and the low-voltage line voltage is 380V. The transformer 30 may be a single-phase transformer or a three-phase transformer. Advantageously, the transformer 30 is a transformer of the 35kV class and below. Advantageously, the at least two mounting chambers further comprise a transformer chamber in which a transformer is arranged, the bottom of the transformer chamber being provided with a metal mounting plate fixedly mounted on the utility pole, for example on a cross-arm fixedly connected to the utility pole. Advantageously, the transformer chamber is arranged below the high-voltage chamber and the low-voltage chamber. Preferably, four sub-chambers of the accessory device chamber are disposed elevationally below the high and low pressure chambers and above the transformer chamber.

In an alternative embodiment, the transformer is a 10kV transformer, the capacity is not limited, and the number of the utility poles is two. In another alternative embodiment, the transformer is a transformer with the capacity of 20-30 kVA and the voltage level of 10kV, and the number of the electric poles is one.

Advantageously, a high-voltage lead wire from an overhead line is connected to the insulating base body through an insulated wire, passes through the high-voltage fuse, is connected in parallel with the high-voltage arrester between a high-voltage conductor and a grounding body, is connected to a high-voltage bushing of a transformer or is directly connected to the inside of a transformer box through a cable, and is provided with the high-voltage isolating switch before being connected to the transformer; a low-voltage lead of the transformer is led out through a low-voltage sleeve or a cable and is connected to a low-voltage overhead line or a low-voltage cable through a low-voltage component; all leads within the confines of the insulating matrix are embedded within the insulating matrix or routed over the insulating matrix.

Fig. 2 is a schematic view of a miniature integrated substation on a pole according to another embodiment of the present invention. In the embodiment shown in fig. 2, the pole-mounted micro integrated substation comprises: utility poles, insulating base 10, transformers, high voltage components, low voltage components, accessories and accessories. The insulating base 10 is divided into at least two mounting chambers. The at least two mounting chambers include a high pressure mounting chamber 11 and a low pressure mounting chamber 12. As shown in fig. 2, the at least two mounting chambers further include an accessory chamber. And a metering device, a reactive compensation device and a telecontrol communication device are arranged in the auxiliary equipment chamber. In particular, the accessory device chamber comprises four sub-chambers: a metering device chamber 13, a reactive compensation device chamber 14, a telemechanical communication device chamber 15 and a fourth chamber. The fourth chamber serves as a distribution box 16 or a backup chamber.

Figure 3 is a schematic diagram of a fuse in the prior art. Fig. 4 is a schematic diagram of a fuse in a pole-mounted micro integrated substation of the present invention. The illustrated fuse is illustrated by way of example as a high voltage fuse 21, and the low voltage fuses (if any) may be of the same or similar construction. The high-voltage fuse 21 is a drop-out fuse, for example, RW 11-10F. As described above, in the pole-mounted micro integrated substation of the present invention, the fuse is directly mounted on the insulating base 10, thereby eliminating the prior art insulator 217 and the mounting plate 218 for fixing the insulator 217 (see fig. 3). Specifically, as shown in fig. 4, the high-voltage fuse in the present invention includes: an upper fixed contact 211, a pressure release cap 212, an upper movable contact 213, a fuse tube 214, a lower movable contact 215 and a lower support 216. The upper stationary contact 211 and the lower holder 216 are directly mounted on the insulating base 10. The current conductors communicating with the upper and

lower contacts

213, 215 are embedded in the insulating matrix 10. It should be noted that the upper stationary contact 211, the pressure release cap 212, the upper movable contact 213, the fuse tube 214, the lower movable contact 215, and the lower support 216 can also be further simplified.

In the invention, the high-voltage isolating switch and the low-voltage isolating switch comprise a connecting hardware fitting, a conductive plate and a locking part which are fixed on the insulating base body. In an alternative embodiment, the high-voltage isolating switch and the low-voltage isolating switch are exposed, and an observation window is arranged for observing the high-voltage isolating switch and the low-voltage isolating switch. In another alternative embodiment, the conductive plates of the high and low voltage disconnectors are integrated with the chamber end cap 233, and the chamber end cap 233 is opened while the corresponding disconnector is opened, and the chamber end cap 233 is closed while the corresponding disconnector is closed (see fig. 7). Regarding the disconnector, a GW9-10kV type disconnector for the high voltage side is taken as an example. Low pressure is similar. Fig. 5 is a schematic diagram of a prior art isolator switch. Fig. 6 is a schematic diagram of a disconnector in a miniature integrated substation on a column according to the invention. Fig. 6 illustrates a high-voltage isolator 23 as an example. As can be seen from fig. 5 and 6, the present invention omits the two insulators or insulating bases of the prior art disconnector. The inlet plate 231 and the outlet plate 232 are directly mounted on the insulating base 10. The structure is simplified, the cost is reduced, and good insulation performance can still be realized.

In the present invention, the disconnector is not installed as a separate device. As shown in fig. 7, the movable part of the isolation switch can be fixed with the chamber cover 233 for convenient operation. The septum in fig. 7 is in an open position and the chamber end cap 233 is lifted to communicate when closed.

The isolating switch of the invention removes the insulator and the base in the prior art, simplifies the wire inlet plate and the wire outlet plate on two sides, combines the wire inlet plate 231, the wire outlet plate 232 and the flow guide body 40, and can be embedded in the insulating base body 10.

Fig. 7 is a schematic view of a miniature integrated substation on a pole according to yet another embodiment of the present invention. Fig. 8 is a schematic top view of the on-post miniature integrated substation shown in fig. 7. In the embodiment shown in fig. 7 and 8, the high voltage fuse 21 is exposed, the high voltage arrester 22 is disposed in a high voltage installation cavity formed by the insulating base 10, and the high voltage disconnector 23 is located in the cavity formed by the insulating base 40 and has a cavity end cover 233. In fig. 7, the high-voltage isolation switch 23 is in an open state, and the high-voltage isolation switch 23 is communicated by closing the chamber end cover 233.

In the embodiment shown in fig. 7 and 8, the insulating matrix is a three-phase common body, and insulating spacers 17 are further provided between the phases. It will be appreciated that the interphase insulating spacer 17 may be omitted if the distance is sufficient. Further, the insulating base may be single-phase, as required.

In an alternative embodiment, the insulating base is provided with vertical bar-shaped reinforcing ribs. Advantageously, the drop-out fuse, the arrester, the disconnector, etc. are fixed at a portion where the vertical bar-shaped reinforcing ribs are provided, so as to improve the strength of the fixing portion. In addition, there are places where other configurations of devices, such as couplers, voltage transformers, etc., may be similarly located. The flow guiding bodies between the parts are embedded in the insulating base body, and actually, the flow guiding bodies can be arranged on the box body without being embedded.

The on-column miniature integrated substation is provided with the mutually independent installation chambers for the high-voltage side device and the low-voltage side device in the insulating box body, and the parts of the devices are directly installed on the insulating base body, so that the integration level of the on-column substation is greatly improved, and the installation efficiency and the safety are improved.

Further, the pole-mounted miniature integrated substation has the advantages that:

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Those of ordinary skill in the art will understand that: modifications can be made to the technical solutions described in the foregoing embodiments, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A pole-mounted miniature integrated transformer substation, which is characterized by comprising a telegraph pole, a transformer, an insulating base body (10), a high-voltage component, a low-voltage component, accessory equipment and accessory accessories, wherein the high-voltage component comprises a high-voltage arrester, a high-voltage fuse (21) and a high-voltage isolating switch (23), the low-voltage component comprises a low-voltage arrester and a low-voltage isolating switch, the accessory equipment comprises all or part of a reactive power compensation device, a metering device and a telecontrol communication device, the insulating base body (10) is made of an insulating material, the insulating base body (10) is divided into at least two installation chambers, the at least two installation chambers comprise a high-voltage installation chamber (11) and a low-voltage installation chamber (12), the high-voltage component is positioned in the high-voltage installation chamber or is installed on the wall of the high-voltage installation chamber, and the low-voltage component is positioned in the low-voltage, the high-voltage isolating switch and the low-voltage isolating switch are directly arranged on the insulating base body, the insulating base body (10) is used as a base of the high-voltage isolating switch and the low-voltage isolating switch,

the high-voltage isolating switch (23) and the low-voltage isolating switch are not installed as independent equipment, the insulator and a base of the high-voltage isolating switch (23) and the low-voltage isolating switch are removed, a wire inlet plate (231) and a wire outlet plate (232) of the high-voltage isolating switch (23) are directly installed on an insulating base body (10), a flow guide body connected with the high-voltage isolating switch (23) is embedded in the insulating base body (10), the high-voltage isolating switch and the low-voltage isolating switch comprise a connecting fitting, a conducting plate and a locking part which are fixed on the insulating base body (10), movable parts of the high-voltage isolating switch and the low-voltage isolating switch are combined with a chamber end cover (233), the corresponding isolating switch is disconnected when the chamber end cover (233) is opened, and the corresponding isolating switch is closed when the chamber end cover (233) is closed,

the high-voltage fuse (21) is directly installed on the insulating base body (10), and an insulator of the high-voltage fuse (21) and a mounting plate for fixing the insulator are omitted.

2. The on-pole micro-integrated substation of claim 1, wherein the at least two mounting chambers further comprise a transformer chamber having a transformer disposed therein, a bottom of the transformer chamber having a metal mounting plate fixedly mounted on the utility pole.

3. The on-pole miniature integrated substation of claim 2, wherein the at least two installation chambers further comprise an accessory equipment chamber, the accessory equipment chamber having disposed therein a metering device, a reactive compensation device and a telemechanical communication device.

4. The on-post micro-integrated substation of claim 3, wherein the accessory equipment chamber comprises four sub-chambers: a metering device chamber, a reactive compensation device chamber, a telemechanical communication device chamber, and a fourth chamber, wherein the fourth chamber functions as a distribution box or a backup chamber.

5. The on-post micro-integrated substation of claim 4, wherein the accessory accessories further comprise a current transformer and a voltage measuring unit mounted on or embedded within the insulating substrate, the signal lines of the current transformer and the voltage measuring unit being embedded within or arranged on the insulating substrate.

6. The pole-mounted micro integrated substation of claim 1, wherein a high voltage lead from an overhead line is connected to the insulating base body through an insulated wire, passes through the high voltage fuse, is connected in parallel with the high voltage arrester between a high voltage conductor and a grounding body, is connected to a high voltage bushing of a transformer or a direct cable, and is connected to the inside of a transformer tank, and the high voltage disconnector is provided before the transformer is connected; a low-voltage lead of the transformer is led out through a low-voltage sleeve or a cable and is connected to a low-voltage overhead line or a low-voltage cable through a low-voltage component; all leads within the confines of the insulating matrix are embedded within the insulating matrix or routed over the insulating matrix.

7. The pole-mounted micro integrated substation of claim 1, wherein the high voltage fuse comprises a two-terminal fitting and a fuse tube fixed on the insulating substrate; the high-voltage fuse is exposed, or an observation window is arranged on the high-voltage installation cavity and used for observing the high-voltage fuse.

8. The pole-mounted micro integrated substation of any one of claims 1 to 7, wherein the high and low voltage disconnectors comprise connecting hardware, conductive plates and locking members fixed on the insulating base (10), and are exposed or provided with observation windows for observing the high and low voltage disconnectors.

9. The on-post micro-integrated substation of any one of claims 1 to 7, wherein the insulating matrix is single-phase or three-phase in common, with further insulating spacers disposed between phases.

10. The on-post micro-integrated substation of any one of claims 1-7, wherein the insulating base body is provided with vertical strip-shaped reinforcing ribs.