CN107171235A - Box-type substation - Google Patents

Abstract

The invention provides a kind of box-type substation, including low-voltage distribution equipment, low-voltage distribution equipment includes：Low-voltage distribution cabinet；Intelligent monitoring unit, intelligent monitoring unit is arranged in low-voltage distribution cabinet, and the information of voltage collected and current information are simultaneously sent to control terminal by the three-phase voltage on conductive track and three-phase current to gather low-voltage distribution equipment.The present invention box-type substation solve box-type substation of the prior art reliability it is poor the problem of.

Description

Box type substation

technical field

The invention relates to the field of electric power, in particular to a box-type substation.

Background technique

The box-type substation was developed in Western developed countries such as Europe and the United States in the 1960s and 1970s. It has strong complete sets, compact structure, beautiful appearance, easy transportation, relocation, and easy installation. The construction period is short, the operating cost is low, and there is no pollution. Maintenance-free and other advantages are valued by electric workers all over the world. In the mid-1990s, simple box-type substations began to appear in China, and the Ministry of Electric Power also formulated relevant standards, but they were not widely used. By the end of the 1990s, especially after the start of the rural power grid reconstruction project, scientific research and development, manufacturing technology and scale etc. have entered into high-speed development, and are widely used in the construction and renovation of urban and rural 10-110kv small and medium-sized substations (distribution) substations, factories and mines, and substations for mobile operations, because they are easy to penetrate into the load center, reduce the power supply radius, and increase the terminal voltage. Quality, especially suitable for the transformation of rural power grids, is known as the target mode of substation construction in the 21st century.

Box-type substation (hereinafter referred to as box-type substation) is a complete set of power distribution equipment in which the high-voltage switchgear, power transformer and low-voltage power distribution device are combined in one or several boxes according to different wiring methods. It is widely used in power transformation and distribution places such as urban high-rise buildings, residential quarters, scenic spots, factories and mines, wind power generation, public places and temporary equipment. At present, the most widely used box-type substation in my country is a box-type substation with a voltage level of 10/0.4kV and a capacity of 50-1250kVA.

Box-type substations are divided into combined type and pre-installed type according to their product structure; according to the wiring mode, they are divided into terminal wiring type and ring network wiring type; according to the use place, they can be divided into indoor type and outdoor type; according to the box structure, they can be divided into Integral and split.

While the box-type transformer is being popularized, people's requirements for the box-type transformer are getting higher and higher, higher power supply reliability, longer service life, less maintenance work, less floor space, and a simpler site The installation method and stronger applicability have become the core content of the research on box-type substations.

At present, the box transformers widely used in the market are all installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft, heat-insulated and fully enclosed box body, with electromechanical integration and fully enclosed operation.

The perfect design of the box transformer makes it have a wider application market, widely used in urban high-rise buildings, residential quarters, scenic areas, factories and mines, wind power generation, public places and temporary equipment and other power transformation and distribution places. However, box-type substations are built in the environment where the underground parking garage is narrow and the air is humid.

With the continuous production of modern industry and the improvement of people's living standards, power users have higher and higher requirements for power quality and power supply reliability. As a complete set of terminal power distribution products directly facing users, the box-type substation is characterized by its strong set-up, quick investment results, small size, and small footprint. It can go deep into the load center and improve the quality of terminal power. It is easy to install and use, and is easy to integrate with the surrounding environment. Coordination and other advantages have gained rapid development and wide application.

However, the traditional box-type substation is an unattended power supply equipment with poor reliability, and cannot realize unattended and remote management, which wastes labor costs and maintenance costs.

Contents of the invention

The main purpose of the present invention is to provide a box-type substation to solve the problem of poor reliability of the box-type substation in the prior art.

In order to achieve the above object, the present invention provides a box-type substation, including a low-voltage power distribution device, the low-voltage power distribution device includes: a low-voltage power distribution cabinet; an intelligent monitoring unit, which is set in the low-voltage power distribution cabinet to collect low-voltage Three-phase voltage and three-phase current on the power line of the power distribution device, and the collected voltage information and current information are transmitted to the control terminal.

Further, the box-type substation also includes: high-voltage switchgear, the high-voltage switchgear is connected to the low-voltage power distribution device through a circuit, and the high-voltage switchgear is an environmentally friendly gas-insulated ring network cabinet.

Further, the high-voltage switchgear includes: a high-voltage switchgear; a data transmission unit, which is arranged in the high-voltage switchgear to collect data information in the high-voltage switchgear and transmit the data information to the control terminal.

Further, the data transmission unit includes a remote signaling module, a telemetry module, and a remote control module. The high-voltage switch cabinet has a first placement part for setting the remote signaling module, a second placement part for setting the telemetry module, and a second placement part for setting the remote control module. The third placement department.

Further, the intelligent monitoring unit is communicatively connected with the data transmission unit, so as to transmit the voltage information and current information collected by the intelligent monitoring unit through the data transmission unit.

Further, the high-voltage switchgear also includes: a connection area, which is arranged on the top of the high-voltage switch cabinet, and the connection area has a wire inlet for cables to enter and a wire outlet for cables to extend out.

Further, the box-type substation further includes: a transformer, which is arranged on the connection circuit between the low-voltage power distribution device and the high-voltage switchgear, so that the high-voltage switchgear is connected to the low-voltage power distribution device through the transformer.

Furthermore, the intelligent monitoring unit is connected with the transformer to monitor the temperature and load rate of the transformer.

Furthermore, the low-voltage power distribution cabinet has a switch area and a capacitor area, and the intelligent monitoring unit is arranged between the switch area and the capacitor area.

Further, the low-voltage power distribution cabinet has a wiring area, which is located at the upper end of the low-voltage power distribution cabinet, and the wiring area is adjacent to the switch area.

The box-type substation of the present invention is provided with an intelligent monitoring unit on the low-voltage power distribution device, and the intelligent monitoring unit can realize the collection of three-phase voltage and three-phase current on the power line of the low-voltage power distribution device. In the specific use process, by setting the intelligent monitoring unit in the low-voltage power distribution cabinet of the low-voltage power distribution device, the power line of the low-voltage power distribution device is connected to the intelligent monitoring unit, so that the current and voltage in the intelligent monitoring unit The collection module realizes the collection of current information and voltage information, and then transmits the collected voltage information and current information to the control terminal through the communication module, so as to realize the remote monitoring of the operator.

Compared with the existing box-type substations that rely on the on-site collection of voltage information and current information by operators, the box-type substation of the present invention can realize unattended and remote management, improve power supply reliability and power quality, and satisfy users The high requirement for electric energy supply solves the problem of poor reliability of box-type substations in the prior art.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows a schematic structural view of an embodiment of a box-type substation according to the present invention;

Fig. 2 shows a schematic structural view of a low-voltage power distribution device of a box-type substation according to the present invention;

Fig. 3 shows a schematic structural diagram of a high-voltage switchgear of a box-type substation according to the present invention; and

Fig. 4 shows a flowchart of information transmission of the box-type substation according to the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. High-voltage switchgear; 11. High-voltage switchgear; 12. Data transmission unit; 20. Low-voltage power distribution device; 21. Low-voltage power distribution cabinet; 22. Intelligent monitoring unit; 23. Switch area; 24. Capacitor area; 25. Wiring area; 30. Transformer; 40. Control terminal.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

The present invention provides a box-type substation, please refer to Figures 1 to 4, the box-type substation includes a low-voltage power distribution device 20, and the low-voltage power distribution device 20 includes: a low-voltage power distribution cabinet 21; an intelligent monitoring unit 22, an intelligent monitoring unit 22 It is installed in the low-voltage power distribution cabinet 21 to collect the three-phase voltage and three-phase current on the power line of the low-voltage power distribution device 20 and transmit the collected voltage information and current information to the control terminal 40 .

The box-type substation of the present invention is equipped with an intelligent monitoring unit 22 on the low-voltage power distribution device 20 , and the intelligent monitoring unit 22 can realize the collection of three-phase voltage and three-phase current on the power line of the low-voltage power distribution device 20 . In the specific use process, by setting the intelligent monitoring unit 22 in the low-voltage power distribution cabinet 21 of the low-voltage power distribution device 20, wherein the power line of the low-voltage power distribution device 20 is connected to the intelligent monitoring unit 22, thereby passing the intelligent monitoring unit The current and voltage acquisition module in 22 realizes the acquisition of current information and voltage information, and then transmits the collected voltage information and current information to the control terminal 40 through the communication module, so as to realize remote monitoring of operators.

Compared with the existing box-type substations that rely on the on-site collection of voltage information and current information by operators, the box-type substation of the present invention can realize unattended and remote management, improve power supply reliability and power quality, and satisfy users The high requirement for electric energy supply solves the problem of poor reliability of box-type substations in the prior art.

Considering the integrity of the box-type substation, as shown in Figure 1, the box-type substation also includes: high-voltage switchgear 10, the high-voltage switchgear 10 is connected to the low-voltage power distribution device 20 through a circuit, and the high-voltage switchgear 10 is an environmentally friendly gas-insulated ring network cabinet.

In this embodiment, the box-type substation further includes: a high-voltage switchgear 10, wherein the high-voltage switchgear 10 is connected to the low-voltage power distribution device 20 through a circuit. The existing box-type substation uses SF6 gas-insulated ring network cabinet as the 10kV switchgear (high-voltage switchgear 10), and the leakage of SF6 gas in the use of the ring network cabinet is an unavoidable practical problem. Considering that SF6 is an international It is recognized as one of the six greenhouse gases. Therefore, in response to the requirements of environmental protection and human health, in this embodiment, the high-voltage switchgear 10 is used as an environmentally friendly gas-insulated ring network cabinet. On the basis of ensuring that the original ring network cabinet has complete functions, In line with the concept of environmentally friendly use.

In order to be able to remotely monitor the high-voltage switchgear 10, as shown in Figure 3, the high-voltage switchgear 10 includes: a high-voltage switchgear 11; a data transmission unit 12, which is arranged in the high-voltage switchgear 11 to collect 11, and transmit the data information to the control terminal 40.

In this embodiment, the high-voltage switchgear 10 includes: a high-voltage switchgear 11 and a data transmission unit 12, wherein the data transmission unit 12 is set in the high-voltage switchgear 11, and by setting the data transmission unit 12 in the high-voltage switchgear 10 The circuit can collect data information in the high-voltage switchgear 11 and transmit the data information to the control terminal 40, so as to satisfy operators' remote monitoring of the high-voltage switchgear 10 .

In order to make better use of the space in the high-voltage switchgear 11, the data transmission unit 12 includes a remote signaling module, a telemetry module and a remote control module. The high-voltage switchgear 11 has a first placement part for setting the remote signaling module. A second placement part for the telemetry module and a third placement part for setting the remote control module are provided.

In this embodiment, in order to independently control each module of the high-voltage switchgear 10, the data transmission unit 12 includes a remote signaling module, a telemetry module, and a remote control module. The first placement part, the second placement part for setting the telemetry module, and the third placement part for setting the remote control module, thus avoiding the space occupation caused by placing the entire data transmission unit 12 directly in the high-voltage switchgear 11 The problem of high rates.

In order to transmit the voltage information and current information collected by the intelligent monitoring unit 22 to the control terminal 40, the intelligent monitoring unit 22 communicates with the data transmission unit 12 to transmit the voltage information and current information collected by the intelligent monitoring unit 22 through the data transmission unit 12. current information. By connecting the intelligent monitoring unit 22 with the data transmission unit 12, the voltage information and current information collected by the intelligent monitoring unit 22 can be transmitted to the data transmission unit 12, and then the data collected by the intelligent monitoring unit 22 can be collected by the data transmission unit 12. The voltage information and current information are transmitted to the control terminal 40 .

In order to facilitate the incoming and outgoing cables, the high-voltage switchgear 10 also includes: a wiring area, which is arranged on the top of the high-voltage switchgear 11. outlet. By setting the wiring area on the high-voltage switchgear 10, wherein the wiring area is arranged on the top of the high-voltage switch cabinet 11, the wiring area has an inlet and an outlet, and the cables are inserted into the high-voltage switch cabinet 11 through the wire inlet to realize communication with the high-voltage switch cabinet 11. The electrical connection of the high-voltage switchgear 10 is then protruded from the high-voltage switchgear 11 through the outlet to complete the circuit integrity of the high-voltage switchgear 10 .

In order to be able to adjust the high and low voltage, as shown in Figure 1, the box-type substation also includes: a transformer 30, the transformer 30 is arranged on the connection circuit between the low-voltage power distribution device 20 and the high-voltage switchgear 10, so that the high-voltage switchgear 10 It is connected to the low-voltage power distribution device 20 through a transformer 30 . A transformer 30 is arranged in the box-type substation, wherein the transformer 30 is arranged on the connecting circuit between the low-voltage power distribution device 20 and the high-voltage switchgear 10, so that the high-voltage switchgear 10 is connected to the low-voltage power distribution device 20 through the transformer 30 , the conversion between high voltage and low voltage is realized through the transformer 30 .

In this embodiment, the box-type substation is composed of high-voltage switchgear 10, low-voltage power distribution device 20 and transformer 30. Compared with the traditional box-type substation, the box-type substation of the present invention is equipped with intelligent The monitoring unit 22 can realize the collection of three-phase voltage and three-phase current on the power line of the low-voltage power distribution device 20 through the intelligent monitoring unit 22, and the data transmission unit 12 is set on the high-voltage switchgear 10 to realize the data information. collection.

In order to monitor the transformer 30 through the intelligent monitoring unit 22 , the intelligent monitoring unit 22 is connected with the transformer 30 to monitor the temperature and load rate of the transformer 30 . By setting the intelligent monitoring unit 22 on the energized circuit of the transformer 30, the temperature and load rate of the transformer 30 can be monitored through the intelligent monitoring unit 22.

In this embodiment, the intelligent monitoring unit 22 is provided with a temperature sensor, a humidity sensor and a gas sensor for monitoring the temperature, humidity and oxygen content of the transformer 30 .

In order to be able to arrange each component in the low-voltage power distribution device 20 in the low-voltage power distribution cabinet 21 accordingly, as shown in FIG. Between the switch area 23 and the capacitance area 24 . A switch area 23 and a capacitor area 24 are provided in the low-voltage power distribution cabinet 21 , wherein corresponding switch components are arranged in the switch area 23 , and capacitor devices are arranged in the capacitor area 24 .

In order to realize the incoming and outgoing cables, as shown in Figure 2, the low-voltage power distribution cabinet 21 has a wiring area 25, which is located at the upper end of the low-voltage power distribution cabinet 21, and the wiring area 25 is adjacent to the switch area 23 . By setting a wiring area 25 in the low-voltage power distribution cabinet 21, wherein the wiring area 25 is located at the upper end of the low-voltage power distribution cabinet 21, the wiring area 25 is adjacent to the switch area 23, and the cables are arranged in the low-voltage power distribution area through the switch area. Inside the cabinet 21.

In the present embodiment, the intelligent monitoring unit 22 reads the following data items of the three-phase electric energy meter through RS485 or the like:

The intelligent monitoring unit 22 reads the capacitor attenuation rate, switching status and other information through RS485, etc., and obtains the tap changer gear information of the on-load capacity-adjusting and voltage-regulating transformer through wireless or direct collection; or broadband carrier to collect information such as voltage, current and temperature of low-voltage equipment. The intelligent monitoring unit is capable of collecting the temperature of the transformer, the temperature of the high and low voltage side of the transformer bushing and pile head through the wireless method, and the temperature, voltage and current of the low voltage outlet through the broadband carrier method.

The concrete composition and the realized effect of the box-type substation of the present invention are explained:

With the continuous production of modern industry and the improvement of people's living standards, power users have higher and higher requirements for power quality and power supply reliability. As a complete set of terminal power distribution products directly facing users, the box-type substation is characterized by its strong set-up, quick investment results, small size, and small footprint. It can go deep into the load center and improve the quality of terminal power. It is easy to install and use, and is easy to integrate with the surrounding environment. Coordination and other advantages have gained rapid development and wide application. The intelligent box-type substation using distribution automation technology can ensure the continuity of power supply, improve power supply reliability and power quality, and realize unattended and remote monitoring and management.

The intelligence of the box-type substation is to apply computer technology, microelectronics technology, power electronics technology, network technology, etc. Transmission and protection parameter remote setting, accident fault judgment, protection and recording and other functions, combined with network technology, wireless transmission technology, etc. to realize remote centralized monitoring and hierarchical management, replacing manual duty, checking instruments, real-time judgment, removal and repair of faults Recording and other manual work can enhance the power supply reliability and safety of box-type substations and improve power quality.

The low-voltage adopts the intelligent measurement and control terminal in the station area to conduct AC sampling on the three-phase voltage and three-phase current on the low-voltage side line of the distribution transformer. Due to the small installation space and no space in the cabinet, distributed DTU is used for high voltage, and the intelligent monitoring unit is directly installed in the secondary room of the ring network cabinet. The invention adopts environment-friendly gas as insulating material, which makes up for the deficiency of SF6 gas insulation.

In response to environmental protection and human health requirements, the ring main unit is designed as an environmentally friendly gas-insulated switchgear. The high-voltage switchgear is designed to be top-in and top-out to facilitate the entry and exit of cables.

Due to the small installation space and no space in the cabinet, the ring network cabinet adopts the design concept of primary and secondary integration. Each unit of the ring network cabinet is equipped with an independent power distribution automation terminal-distributed DTU, so that each unit can be independently controlled and realized. "Remote signaling, telemetry and remote control" of remote primary equipment.

In order to realize the intelligent control of the box-type substation, the low-voltage adopts the intelligent measurement and control terminal to monitor the temperature of the transformer, monitor the status of the low-voltage outgoing line and collect the full power; at the same time, the load rate of the transformer can be monitored to realize the orderly charging management of electric vehicles. Improve the reliability of power supply, improve the quality of power supply, and improve the management level. Intelligent monitoring and management can shorten the time for handling accidents, reduce the scope of power outages, and reduce the cost of operation and maintenance.

The present invention adopts wired broadband Internet communication mode, GPRS wireless communication mode with signal amplifying module or electric power carrier mode and the like.

The 10kV ring network cabinet adopts the circuit breaker unit as the transformer incoming line, which can not only switch on and off the normal load current, but also can switch on and off a certain short-circuit current. It can also automatically trip under the action of the relay protection device to remove the short-circuit fault.

In order to realize the intelligent control of the box-type substation, the low-voltage adopts the intelligent measurement and control terminal (TTU) to monitor the temperature of the transformer, monitor the status of the low-voltage outgoing line and collect the full power; at the same time, it can monitor the load rate of the transformer to realize the orderly charging management of electric vehicles .

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

The box-type substation of the present invention is equipped with an intelligent monitoring unit 22 on the low-voltage power distribution device 20 , and the intelligent monitoring unit 22 can realize the collection of three-phase voltage and three-phase current on the power line of the low-voltage power distribution device 20 . In the specific use process, by setting the intelligent monitoring unit 22 in the low-voltage power distribution cabinet 21 of the low-voltage power distribution device 20, wherein the power line of the low-voltage power distribution device 20 is connected to the intelligent monitoring unit 22, thereby passing the intelligent monitoring unit The current and voltage acquisition module in 22 realizes the acquisition of current information and voltage information, and then transmits the collected voltage information and current information to the control terminal 40 through the communication module, so as to realize remote monitoring of operators.

Compared with the existing box-type substations that rely on the on-site collection of voltage information and current information by operators, the box-type substation of the present invention can realize unattended and remote management, improve power supply reliability and power quality, and satisfy users The high requirement for electric energy supply solves the problem of poor reliability of box-type substations in the prior art.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A box-type substation comprising a low-voltage power distribution device (20), characterized in that the low-voltage power distribution device (20) comprises: Low-voltage distribution cabinet (21); An intelligent monitoring unit (22), the intelligent monitoring unit (22) is arranged in the low-voltage distribution cabinet (21), to collect the three-phase voltage and the three-phase voltage on the power line of the low-voltage distribution device (20) current and transmit the collected voltage information and current information to the control terminal (40). 2. The box-type substation according to claim 1, wherein the box-type substation further comprises: A high-voltage switchgear (10), the high-voltage switchgear (10) is connected to the low-voltage power distribution device (20) through a circuit, and the high-voltage switchgear (10) is an environment-friendly gas-insulated ring main unit. 3. The box-type substation according to claim 2, wherein the high-voltage switchgear (10) comprises: High voltage switchgear (11); A data transmission unit (12), the data transmission unit (12) is arranged in the high-voltage switch cabinet (11), to collect data information in the high-voltage switch cabinet (11), and transmit the data information to Control terminal (40). 4. The box-type substation according to claim 3, characterized in that, the data transmission unit (12) includes a remote signaling module, a telemetry module and a remote control module, and the high-voltage switch cabinet (11) has a device for setting the The first placement part for the remote signaling module, the second placement part for setting the telemetry module, and the third placement part for setting the remote control module. 5. The box-type substation according to claim 3, characterized in that, the intelligent monitoring unit (22) is communicatively connected with the data transmission unit (12), so as to transmit the The voltage information and the current information collected by the intelligent monitoring unit (22). 6. The box-type substation according to claim 3, characterized in that, the high-voltage switchgear (10) further comprises: A wiring area, the wiring area is arranged on the top of the high-voltage switch cabinet (11), and the wiring area has a wire inlet for cables to extend in and a wire outlet for cables to extend out. 7. The box-type substation according to claim 2, wherein the box-type substation further comprises: A transformer (30), the transformer (30) is arranged on the connection circuit between the low-voltage power distribution device (20) and the high-voltage switchgear (10), so that the high-voltage switchgear (10) passes through the The transformer (30) is connected to the low-voltage power distribution device (20). 8. The box-type substation according to claim 7, characterized in that the intelligent monitoring unit (22) is connected to the transformer (30) to monitor the temperature and load rate of the transformer (30). 9. The box-type substation according to claim 1, characterized in that, the low-voltage power distribution cabinet (21) has a switch area (23) and a capacitor area (24), and the intelligent monitoring unit (22) is set in Between the switch area (23) and the capacitance area (24). 10. The box-type substation according to claim 9, characterized in that, the low-voltage power distribution cabinet (21) has a wiring area (25), and the wiring area (25) is located in the low-voltage power distribution cabinet On the upper end of (21), the wiring area (25) is adjacent to the switching area (23).