CN204835331U - Integration intelligence combination transformer substation - Google Patents

Abstract

The utility model relates to an integrated intelligent combined substation, which is installed on the ground or on a pole off the ground, and includes an outdoor integrated intelligent combined electrical appliance, a transformer, a comprehensive intelligent distribution box or a low-voltage protection switch box for a distribution transformer, and a medium-voltage cable. Attachment, the comprehensive intelligent distribution box or distribution transformer low-voltage protection switch box is fixedly installed on the side of the low-voltage terminal of the transformer; the substation completes the protection and isolation of the high-voltage side of the oil-immersed power transformer through an outdoor integrated intelligent combination appliance The integrated intelligent distribution box or distribution transformer low-voltage protection switch box completes comprehensive functions such as power distribution and protection on the low-voltage side, and improves power supply reliability and power quality. Intelligent management and condition-based maintenance.

Description

An integrated intelligent combined substation

technical field

The utility model relates to the technical field of power transmission, transformation and distribution of smart grids, in particular to an integrated intelligent combined substation.

Background technique

There are many limitations in the actual application of the existing distribution station areas, such as the dilemma of no construction land for urban network reconstruction and small commercial power distribution construction in load-intensive areas; the construction of temporary power consumption is complicated, and it is inconvenient to disassemble and move; prefabricated substations Unable to adapt to the actual needs of flood control areas; buried high-end villa substations also need more cost-effective alternatives; distributed power access (such as solar power generation), electric vehicle charging pile power supply, small shore power system (reduce pollution), etc. Due to factors such as lag in planning and design of new technologies, it is difficult to find practical solutions at present, and it is difficult to meet the requirements of the state's energy conservation and environmental protection policies.

Although adopting existing stand is that the transformer can further solve the above-mentioned problems. However, the existing bench transformer has a low level of insulation and many control points in the construction process, resulting in many faults and potential safety hazards, which can easily affect the tripping rate of the line. It can be seen that the existing outdoor distribution stations still need to further improve their functions and optimize their configuration. The status quo is different to carry out construction. The integrated design, functional integration and interactive functions of the distribution station need to be further improved and studied.

The Chinese utility model patent application with the patent number ZL201420232114.4 discloses a 10KV intelligent fee-controlled pole-mounted combined substation, which includes an intelligent fee-controlled vacuum load switch, a transformer, a low-voltage JP cabinet; a low-voltage JP cabinet In the front of the transformer, the upper end of the rear of the transformer is fixed with a bracket by fixing bolts. The bracket is equipped with a stainless steel box equipped with an intelligent fee-controlled vacuum load switch. The stainless steel box is sealed with a 10kV voltage transformer. The cable connects the outgoing line of the intelligent charge-controlled vacuum load switch with the high-voltage side of the transformer. Although the combined substation combines intelligent cost-controlled vacuum load switches, transformers, and low-voltage JP cabinets, its structure is scattered and its safety is poor, so it is not suitable for outdoor installation.

Contents of the invention

In order to overcome the above defects and deficiencies in the prior art, the utility model provides a combined substation, the substation completes the protection and isolation of the high voltage side of the oil-immersed power transformer through an outdoor integrated intelligent combined electrical appliance, and through the integrated intelligent distribution box Or the distribution transformer low-voltage protection switch box completes comprehensive functions such as power distribution and protection on the low-voltage side, improves power supply reliability and power quality, and the optional power distribution automation equipment and intelligent sensing terminals can realize intelligent management and status of the distribution station area overhaul. The terminal of the station has the function of collecting and remote transmission of analog and state quantities, and has the function of on-site control of the switch, which can set the action value locally or remotely. Isolate the fault. Intelligent power distribution terminal, the intelligent power distribution terminal of this device, integrates the functions of existing multiple devices, and can collect operating information such as power transformers, incoming and outgoing line switches, residual current action protectors, smart energy meters, etc. Information collection, with the ability to complete distribution transformer meter monitoring, residual current action protector monitoring, status monitoring, load management, dynamic reactive power compensation/three-phase unbalance control/harmonic control, safety protection, interactive management, asset Management, video surveillance, environmental monitoring and distributed power access management and other functions.

In order to achieve the above purpose, the technical solution of the utility model is: an integrated intelligent combined substation, which is installed on the ground or on a pole above the ground, including outdoor integrated intelligent combined electrical appliances, transformers, integrated intelligent distribution boxes or distribution transformers Low-voltage protection switch box and medium-voltage cable accessories, the outdoor integrated intelligent combined electrical appliance is installed directly above the transformer; the integrated intelligent distribution box or distribution transformer low-voltage protection switch box is fixedly installed on the side of the low-voltage terminal of the transformer; outdoor The incoming line end of the integrated intelligent combined electrical appliance is connected to the high-voltage cable incoming line of the medium-voltage cable accessory, and the outgoing line is connected to the high-voltage cable connecting line of the medium-voltage cable accessory; the other end of the high-voltage cable connecting line of the medium-voltage cable accessory is connected to the The high-voltage bushing of the transformer is connected, and the low-voltage end of the transformer is connected to the comprehensive intelligent distribution box or the distribution transformer low-voltage protection switch box.

Preferably, the outdoor integrated intelligent combined electrical appliance includes an outdoor three-position spring energy storage mechanism, a three-position load switch, a single-phase melting bin, a current-limiting fuse, a lightning arrester arc-extinguishing coil, and medium-voltage cable accessories. .

In any of the above-mentioned schemes, preferably, the outdoor integrated intelligent combined electrical appliance includes an isolating switch, a vacuum circuit breaker, a lightning arrester and medium-voltage cable accessories.

In any of the above schemes, preferably, the transformer is an oil-immersed power transformer.

In any of the above schemes, it is preferred that the high-voltage side of the outdoor integrated intelligent combined electrical appliance adopts a combination of a three-position load switch and a current-limiting fuse. The three phases of the switch are simultaneously opened.

In any of the above schemes, it is preferred that the integrated intelligent distribution box or distribution transformer low-voltage protection switch box is composed of a fuse-type isolating switch or a frame circuit breaker or a molded case circuit breaker, an intelligent capacitor bank or an intelligent adjustment capacitor bank , intelligent power distribution terminal, etc., to meet the requirements of low-voltage side protection and multiple low-voltage outlets.

In any of the above schemes, it is preferable that the integrated intelligent distribution box or the distribution transformer low-voltage protection switch box and the transformer are detachably connected by bolts as an integral structure.

In any of the above schemes, it is preferable that the integrated intelligent distribution box or the distribution transformer low-voltage protection switch box is of an integrated rectangular box structure.

In any of the above schemes, preferably, the outdoor integrated intelligent combined electrical appliance is installed on the top of the transformer through the base at the bottom.

In any of the above schemes, it is preferable that each of the front, rear, left, and right sides of the frame shell has two doors, and the four feet of the frame shell are provided with mounting brackets.

In any of the above schemes, it is preferred that vents are provided on both sides of the frame housing.

In any of the above solutions, it is preferable that a lifting device is provided on the top of the housing of the outdoor integrated intelligent combined electrical appliance.

In any of the above schemes, preferably, the pulling device is a pulling ring and there are two in number.

In any of the above solutions, it is preferred that the two lifting rings are fixedly connected to the top of the shell of the outdoor integrated intelligent combined electrical appliance through bolts.

Compared with the existing technology, the utility model has the advantages of: the integrated, intelligent, combined substation realizes the standardized design of the entire distribution station area, factory processing: realizes the real factory prefabricated on-site assembly of the distribution station area construction, The construction period and construction cost are reduced, the interface standardization of primary equipment (load switch, fuse, lightning arrester and power transformer) is realized, and the reuse rate of production materials is high; the whole distribution station area is fully insulated, fully sealed and fully shielded: It is touchable, small in size, easy to disassemble and assemble, and solves the potential safety hazard caused by exposed live conductors; improves the construction technology and construction safety level of the entire distribution station area: the outdoor three-station load switch and five-proof interlock design will greatly improve The personal safety of live workers; realize the distribution automation of the entire distribution station area, improve the level of operation and maintenance; realize the modularization of the expansion function of the entire distribution station area.

Description of drawings

Fig. 1 is a schematic diagram of the front view of a preferred embodiment of the integrated intelligent combined substation according to the present invention.

Fig. 2 is a schematic side view of the embodiment shown in Fig. 1 of the integrated intelligent combined substation according to the present invention.

Fig. 3 is a top view structural diagram of the embodiment shown in Fig. 1 of the integrated intelligent combined substation according to the present invention.

Fig. 4 is a front structural schematic diagram of a frame shell in a preferred embodiment of an integrated intelligent combined substation according to the present invention.

Fig. 5 is a top view structural diagram of the embodiment shown in Fig. 4 of the integrated intelligent combined substation according to the invention.

Fig. 6 is a schematic diagram of the pole-mounted installation structure of the integrated intelligent combined substation according to the utility model.

Detailed ways

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described further;

Example 1:

As shown in Figures 1-6, an integrated intelligent combined substation of the present invention is disclosed. The integrated intelligent combined substation is installed on a pole, and its low-voltage cables use underground outlets. Including outdoor integrated intelligent combined electrical appliance 1, transformer 2, comprehensive intelligent distribution box or distribution transformer low-voltage protection switch box 3, medium voltage cable accessories, the outdoor integrated intelligent combined electrical appliance 1 is installed directly above the transformer 2; specifically , the outdoor integrated intelligent combined electrical appliance 1 is installed on the top of the transformer 2 through the base at the bottom thereof.

The comprehensive distribution box or the low-voltage protection switch box 3 of the distribution transformer is fixedly installed on the low-voltage terminal side of the transformer 2; The other end of the high-voltage cable connection 4 of the medium-voltage cable accessory is connected to the high-voltage bushing of the transformer 2, and the low-voltage end of the transformer 2 is connected to the integrated intelligent distribution box or The distribution transformer low-voltage protection switch box 3 is connected. In this embodiment, the transformer is an oil-immersed power transformer. The outdoor integrated intelligent combined electrical appliance 1 includes an outdoor three-position spring energy storage mechanism, a three-position load switch, a single-phase melting bin, a current-limiting fuse, a lightning arrester arc-extinguishing coil, and medium-voltage cable accessories. The high-voltage side of the outdoor integrated intelligent combination appliance 1 adopts a combination of a three-position load switch and a current-limiting fuse. When a one-phase fuse occurs, the striker of the fuse is used to open the three phases of the load switch. The comprehensive intelligent distribution box or distribution transformer low-voltage protection switch box 3 is composed of a fuse-type isolating switch or a frame circuit breaker or a molded case circuit breaker, an intelligent capacitor bank or an intelligent adjustment and compensation capacitor bank, and an intelligent power distribution terminal to meet the requirements of Requirements for low-voltage side protection and multiple low-voltage outlets. The integrated intelligent distribution box or the distribution transformer low-voltage protection switch box 3 and the transformer 2 are detachably connected by bolts to form an integrated structure. The comprehensive intelligent distribution box or distribution transformer low-voltage protection switch box 3 is an integrated rectangular box structure.

In this embodiment, the structure of the frame shell is that there are two opposite doors on each side of the front, rear, left, and right sides, and the four feet of the frame shell are provided with mounting brackets. The mounting bracket is used to fix the frame shell. Vents are provided on both sides of the frame housing. The top of the casing of the outdoor integrated intelligent combined electrical appliance 1 is provided with a lifting device. The lifting device is two lifting rings, and the lifting rings are evenly distributed on the top plane of the shell. The two lifting rings are fixedly connected to the top of the shell of the outdoor integrated intelligent combined electrical appliance by means of bolts or welding.

The integrated intelligent combined substation of the utility model, from the perspective of convenient design and installation, adopts an integrated assembly structure design as a whole, and can realize full insulation, full shielding and full sealing of the device, thereby solving the difficulty of intensive procurement, safety Poor compatibility and poor interchangeability; From the perspective of convenient later operation and maintenance management, capacity expansion, etc., the internal design adopts the structural function modularization scheme and the intelligent perception technology of primary and secondary integration to realize the one-stop configuration of "one-time demand one-time satisfaction". A new model is built in the radio area to solve problems such as functional integration and interaction. Outdoor three-position load switch plus current-limiting fuse protection, SF6 gas insulation and arc extinguishing, plus arc extinguishing coil scheme; isolation switch and circuit breaker protection, solid insulation and vacuum arc extinguishing scheme. At the same time, an outdoor three-position spring energy storage operating mechanism is designed, which can be operated outdoors by a gram stick, and the load switch closing and energy storage can be completed in one operation. The three-position load switch integrates the functions of both the load switch and the grounding switch. The function is completed by an integrated load switch, which can realize mechanical locking and prevent the main circuit from being electrified and closing the ground knife. Compared with the existing technology, the utility model has the characteristics of integration, intelligence and combination, realizes the standardized design of the entire distribution station area, realizes the real factory prefabricated on-site assembly of the construction of the distribution station area, and reduces the construction period and construction costs, the interface standardization of primary equipment (load switches, fuses, lightning arresters, and power transformers) has been realized, and the reuse rate of production materials is high; the entire distribution station area has been fully insulated, fully sealed, and fully shielded: touchable, volumetric Small size, easy disassembly and assembly, which solves the potential safety hazard caused by exposed live conductors; improves the construction technology and construction safety level of the entire distribution station area: the outdoor three-position load switch and five-proof interlock design will greatly improve the safety of live operators Personal safety; realize the distribution automation of the entire distribution station area, improve the operation and maintenance level; realize the expansion function modularization of the entire distribution station area. There are two types of outdoor integrated intelligent combined electrical appliances of the utility model: one is that it adopts an outdoor three-station load switch plus a current-limiting fuse for protection, which is mainly composed of an outdoor three-station spring energy storage operating mechanism, a three-station It is composed of load switch, single-phase melting bin, current-limiting fuse, lightning arrester, arc-extinguishing coil and medium-voltage cable accessories; when the high-voltage side of the outdoor integrated intelligent combined electrical appliance is protected by an outdoor three-position load switch plus a current-limiting fuse, When the one-phase fuse is blown, use the striker of the fuse to open the load switch in three phases at the same time, so as to avoid the lack of phase operation, and the load switch has the ability to cut off the transfer current. The distribution automation equipment and intelligent sensing terminal selected in the outdoor integrated intelligent combined electrical appliances can realize the intelligent management of the distribution station area. The power transformer adopts a small oil-immersed power transformer. The high-voltage and low-voltage terminals and the high-voltage incoming and outgoing lines of the outdoor integrated intelligent combined electrical appliance have been designed in a standardized interface, which can realize the modular assembly of the high and low voltage sides, so as to realize the integrated intelligent combination Fully insulated, fully shielded and fully sealed for substations. The comprehensive intelligent distribution box or distribution transformer low-voltage protection switch box is mainly composed of fuse type isolating switch or frame circuit breaker or molded case circuit breaker, intelligent capacitor bank or intelligent adjustment capacitor bank and various intelligent power distribution terminals, etc. Requirements for low-voltage side protection and multiple low-voltage outlets. The three-position load switch is composed of a three-position spring energy storage operating mechanism, a three-position load switch, an arc extinguishing coil and an indicating device. The outdoor three-position spring energy storage operating mechanism can be operated outdoors by the gram rod, and the load switch closing and energy storage can be completed in one operation. The three-position load switch integrates the functions of the load switch and the grounding switch, and is integrated It can be completed with a type load switch, which can realize mechanical locking and prevent the main circuit from being electrified and closing the ground.

work process

1. The power-on process of the outdoor integrated intelligent combined electrical appliance is as follows:

1. Confirm that the right door of the outdoor integrated intelligent combination appliance is closed, the grounding switch is in the closing position, and the indicator needle is in the grounding position;

2. Pull down the left side of the grounding switch operating lever, the grounding switch is off, the indicator needle is at the off position, and the right door of the outdoor integrated intelligent combination appliance cannot be opened;

3. Pull down the closing energy storage operating lever back and forth until the load switch is closed and the energy storage operation is completed at the same time, the indicator needle is at the closing position, and the power-on process is over.

2. The power-off process of outdoor integrated intelligent combined electrical appliances is as follows:

1. Push the opening operating lever upwards, the load switch will open, and the indicator needle will be at the opening position, indicating that the power has been cut off;

2. During inspection and maintenance, pull down the right side of the grounding switch operating lever, the grounding switch is closed, and the indicator needle is at the grounding position. At this time, the right door of the outdoor integrated intelligent combination appliance is opened, and operations such as replacing the fuse can be performed.

Referring again to Figures 1-6, in this embodiment, the integrated intelligent combined substation is fixedly installed on the concrete pole through two double-pole support frames 19, and is reinforced by four diagonal braces 24. Concrete poles are mounted on two chassis 29 . The transformer is fixedly connected to the double pole support frame 19 through two transformer fixing brackets 26, and three zinc oxide lightning arresters 13 are installed on the concrete pole, and the low-voltage cable 25 is protected by a glass fiber reinforced plastic cable protection tube 28, and the single cores are intertwined The overhead insulated flexible cable 15 is fixed by the first hoop 6 , the first high voltage cross arm, the second hoop 8 , the second high voltage cross arm 9 , and the third hoop 18 . Two double-rod support frames 19 are supported by two support hoops 20 . The fourth hoop 21, the fifth hoop 22, the cross-arm hoop 23, and the sixth hoop 27 are used to fix the low-voltage cable 25 on the concrete pole.

Example 2:

The difference between this embodiment and Embodiment 1 is that the outdoor integrated intelligent combined electrical appliance is protected by an isolating switch and a vacuum circuit breaker, which is mainly composed of an isolating switch, a vacuum circuit breaker, a lightning arrester and medium-voltage cable accessories.

It should be noted that the scope of the integrated intelligent combined substation solution of the present invention includes but is not limited to any combination of the above-mentioned parts.

Although the present invention has been shown and described with particular reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from what is described in the appended claims. The scope of the utility model. The above has been described in detail in conjunction with specific embodiments of the present invention, but it is not intended to limit the present invention. Any simple modification made to the above embodiments according to the technical essence of the utility model still belongs to the scope of the technical solution of the utility model.

Claims (12)

1. An integrated intelligent combined substation, which is installed on the ground or on a pole off the ground, including outdoor integrated intelligent combined electrical appliances, transformers, integrated intelligent distribution boxes or low-voltage protection switch boxes for distribution transformers, and medium-voltage cable accessories, It is characterized in that: the outdoor integrated intelligent combined electrical appliance is installed directly above the transformer; the integrated intelligent distribution box or distribution transformer low-voltage protection switch box is fixedly installed on the side of the low-voltage terminal of the transformer; the incoming line of the outdoor integrated intelligent combined electrical appliance The end is connected to the high-voltage cable inlet line of the medium-voltage cable accessory, and the outlet end is connected to the high-voltage cable connection line of the medium-voltage cable accessory; the other end of the high-voltage cable connection line of the medium-voltage cable accessory is connected to the high-voltage bushing of the transformer, and the transformer The low-voltage side of the switch is connected to the comprehensive intelligent distribution box or the distribution transformer low-voltage protection switch box. 2. The integrated intelligent combined substation according to claim 1, characterized in that: the outdoor integrated intelligent combined electrical appliance includes an outdoor three-position spring energy storage mechanism, a three-position load switch, a single-phase melting bin, a limit It is composed of current fuse, lightning arrester arc extinguishing coil and medium voltage cable accessories. 3. The integrated intelligent combined substation according to claim 1, characterized in that: the outdoor integrated intelligent combined electrical appliance comprises an isolating switch, a vacuum circuit breaker, a lightning arrester and medium-voltage cable accessories. 4. The integrated intelligent combined substation according to claim 1, wherein the transformer is an oil-immersed power transformer. 5. The integrated intelligent combined substation according to claim 2, characterized in that: the high voltage side of the outdoor integrated intelligent combined electrical appliance adopts a combination of three-position load switch and current-limiting fuse, when a phase fuse occurs , use the firing pin of the fuse to open the three phases of the load switch at the same time. 6. The integrated intelligent combined substation according to claim 1, characterized in that: the integrated intelligent distribution box and the distribution transformer low-voltage protection switch box are composed of a fuse type isolating switch or a frame circuit breaker or a molded case circuit breaker, It is composed of intelligent capacitor bank or intelligent adjustment and compensation capacitor bank, intelligent power distribution terminal, etc., to meet the requirements of low-voltage side protection and multiple low-voltage outgoing lines. 7. The integrated intelligent combined substation according to claim 6, characterized in that: the integrated intelligent distribution box, the distribution transformer low-voltage protection switch box and the transformer are detachably connected by bolts as an integral structure. 8. The integrated intelligent combined substation according to claim 7, characterized in that: the integrated intelligent distribution box or the distribution transformer low-voltage protection switch box is an integrated rectangular box structure. 9. The integrated intelligent combined substation according to claim 1, characterized in that: the outdoor integrated intelligent combined electrical appliance is installed on the top of the transformer through the base at the bottom thereof. 10. The integrated intelligent combined substation according to claim 1, characterized in that: the top of the shell of the outdoor integrated intelligent combined electrical appliance is provided with a lifting device. 11. The integrated intelligent combined substation according to claim 10, wherein the pulling device is two pulling rings. 12. The integrated intelligent combined substation according to claim 11, wherein the two lifting rings are fixedly connected to the top of the housing of the outdoor integrated intelligent combined electrical appliance through bolts.