CN203911324U - Novel secondary terminal box - Google Patents

Abstract

The utility model discloses a novel secondary terminal box. The secondary terminal box includes a primary equipment interval and a secondary equipment interval; a voltage transformer and a grounding unit are arranged in the primary equipment interval; an intelligent power distribution is arranged in the secondary equipment interval Automatic measurement and control terminal, network switch, charging system, temperature and humidity control system and cable temperature measurement system; the input terminals of the intelligent power distribution automation measurement and control terminal are respectively connected to the output terminals of the temperature and humidity control system and the cable temperature measurement system, and the primary circuit of the voltage transformer The output terminal, the secondary terminal of the current transformer of the ring network cabinet, and the auxiliary contact of the on-off switch of the ring network cabinet; the output terminal of the intelligent power distribution automation measurement and control terminal is connected to the input terminal of the network switch, and the output terminal of the network switch is connected to the The data is transmitted to the network background of the peripheral device; the aforementioned voltage transformer supplies power to each remote control circuit through the charging system, and the charging system includes a charger and a storage battery. Connect to and supply power to the battery and each remote control circuit.

Description

New secondary terminal box

technical field

The utility model relates to a novel secondary terminal box, which belongs to the technical field of distribution automation systems.

Background technique

The distribution network connects the power generation and transmission system with users, and supplies electric energy directly to users. With the increase of power consumption and the development of the power market, users' demands for power supply reliability, power quality and high-quality service are constantly increasing. Distribution automation is to realize the monitoring of distribution network and its equipment under normal operation and accident status. , protection, control, and modernization of power usage and distribution management.

In the distribution network, the ring main unit mainly plays the role of distributing electric energy, connecting the ring network lines, and isolating fault points. Function, through the real-time monitoring of the distribution network, the security of distribution network dispatching is improved, and the phenomenon of "blind adjustment" caused by insufficient supporting information is avoided. For the current ring network cabinets in various regions, they basically cannot meet the requirements of "three remotes", and cannot perform real-time status monitoring and data collection.

Contents of the invention

The technical problem to be solved by the utility model is that the existing distribution network ring network cabinet cannot meet the functions of "telemetry, remote signaling, and remote control", and cannot perform real-time state monitoring and data collection. Due to insufficient support information, often caused "Blind tuning" phenomenon.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a new type of secondary terminal box, which is used in conjunction with the peripheral ring network cabinet, and the ring network cabinet includes an incoming line interval and more than one working interval, so The secondary terminal box described above includes a primary equipment interval and a secondary equipment interval; a voltage transformer and a grounding unit are arranged in the primary equipment interval; the input end of the primary circuit of the voltage transformer is connected to the output of the incoming line interval of the ring network cabinet terminal, the output terminals of the secondary circuit of the voltage transformer are respectively connected to the remote control circuit in each working interval of the ring network cabinet; a fuse is arranged in series on each of the primary circuit and the secondary circuit; the grounding unit is installed on the inner side of the primary equipment interval and extend to the ground outside the box; the secondary equipment compartment is equipped with an intelligent power distribution automation measurement and control terminal, a network switch, a charging system, a temperature and humidity control system, and a cable temperature measurement system; the input terminals of the intelligent power distribution automation measurement and control terminal are respectively Connect the output terminal of the temperature and humidity control system and the cable temperature measurement system, the output terminal of the primary circuit of the voltage transformer, the secondary terminal of the current transformer of the ring network cabinet, and the auxiliary contact of the opening and closing switch of the ring network cabinet; intelligent power distribution The output end of the automatic measurement and control terminal is connected to the input end of the network switch, and the output end of the network switch is connected to and transmits data to the network background of the peripheral device; the aforementioned voltage transformer supplies power to each remote control circuit through a charging system, and the charging system includes a charger and For the battery, the input end of the charger is connected to the output end of the secondary circuit of the voltage transformer, and the output end is connected to supply power for the battery and each remote control circuit.

Setting the voltage transformer has two functions: first, collect the line voltage of the ring network cabinet and input the voltage value into the intelligent power distribution automation measurement and control terminal for real-time monitoring; second, provide operating power for each remote control circuit of the ring network cabinet, Realize the electric remote control opening and closing function of the ring network cabinet; the setting of the fuse is used to cut off the fault current, and the grounding unit can reliably ground the entire box to eliminate the residual voltage in the ring network cabinet after a power failure; The installed 4-core secondary cable is connected to the secondary terminal of the current transformer of the ring network cabinet and the intelligent power distribution automation measurement and control terminal, and the current value of the ring network cabinet is collected for real-time monitoring; the armored 16-core secondary cable is used The auxiliary contact connected to the on-off switch of the ring main unit and the intelligent power distribution automation measurement and control terminal are used to monitor the opening and closing status of the ring main unit switch in real time; the current value, voltage value, switch opening and closing status, temperature, etc. of the ring main unit After the information is summarized in the intelligent power distribution automation measurement and control terminal, it is used to sample and monitor the internal data of the ring network cabinet, automatically detect and identify equipment faults, diagnose equipment status and perform remote maintenance; and the setting of the network switch facilitates the transmission of real-time information Go to the remote monitoring background for network debugging and uploading of sampled data. The charging system is used to convert the AC voltage output by the secondary circuit of the voltage transformer into a DC voltage output as the power supply of each remote control circuit. At the same time, it can provide a backup power supply after a power failure, so that the ring main unit can still operate normally. The charging system includes a charger and a battery. When the ring main unit is in normal operation, the voltage transformer supplies power to the charger, and the charger converts the AC power supplied by the voltage transformer into a direct current supply to the control circuit, and also charges the battery; when the ring main unit When there is a power failure, the battery provides backup power to the control circuit through the charger. Therefore, regardless of whether the ring network cabinet is in the running state or the power failure state, the opening and closing of the switch of the ring network cabinet can be operated through the remote control circuit.

As an improved solution of the utility model, a pressure relief sealing plate is also provided at the rear of the primary equipment compartment. The pressure relief sealing plate is installed at the rear of the primary equipment compartment to release the gas pressure generated after the voltage transformer fails.

As another improvement of the utility model, a secondary routing channel and a communication optical cable channel are also provided in the primary equipment interval, and the secondary routing channel and the communication optical cable channel are respectively arranged on the left and right sides of the primary equipment interval. Set the secondary routing channel to provide a dedicated routing channel for the secondary cable to ensure that the secondary device can still work normally after the primary device fails; On the side, ensure that the communication system is isolated from the electrical system to avoid electromagnetic interference during signal transmission.

As another improvement of the utility model, a sealing strip is provided between the box body and the cabinet door of the aforementioned primary equipment compartment and secondary equipment compartment. It is convenient to seal the inside of the cabinet to prevent moisture from entering.

As another improvement of the utility model, the aforementioned secondary equipment is provided with observation windows of laminated glass at intervals, and the position of the observation windows corresponds to the position of the display screen of the intelligent power distribution automation measurement and control terminal. This design makes it easy to check the operation of internal components without opening the cabinet door.

The beneficial effect of the utility model is: the communication equipment and the secondary equipment are installed in the secondary equipment compartment, the primary equipment is installed in the primary equipment compartment, the two compartments are completely independent, and the compartments can be inspected and repaired separately without hindering the other compartment Normal operation; real-time collection and monitoring of the ring network cabinet through the intelligent power distribution automation measurement and control terminal to realize the "three remote" data collection and transmission functions; the secondary terminal box is installed in the metal outdoor room, with a compact structure, a small footprint, and easy maintenance operations Convenience; through the real-time monitoring of line equipment, the rapid location and isolation of fault points can be realized, the "blind adjustment" phenomenon of dispatching can be solved, the fault can be isolated in the minimum range and the power supply in non-faulty areas can be restored to the maximum extent, and the impact on users can be reduced. Shorten the outage time, reduce the scope of outages, and improve the reliability of power supply.

Description of drawings

Figure 1 is a schematic diagram of the arrangement of components inside the terminal box of the present invention.

Fig. 2 is a schematic diagram of the overall external structure of the terminal of the present invention.

Fig. 3 is a schematic diagram of the installation of the metal outdoor room of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

As shown in Figure 1 and Figure 2, the new secondary terminal box of the utility model is divided into a primary equipment interval 15 and a secondary equipment interval 14, the secondary equipment interval 14 and the primary equipment interval 15 are independent boxes, arranged up and down , The two compartments are connected with grade 8.8 fasteners. The material of the box body is made of 2.0mm cold-rolled steel plate with plastic sprayed on the surface. The sheet metal parts inside the box room are riveted with steel oblate head blind rivets, and the four corners of the box body are seam-welded and polished. The rivets are all punched with a drawing die to make the surface of the box smooth and no protruding screw heads can be seen. The door panels of the two compartments adopt a double-bending process, and there are sealing strips around them, so that the door panels and the frame have good cushioning and sealing effects when closing. The door locks and hinges adopt nano-spraying technology, and all have passed weather resistance tests, mechanical performance tests, and physical and chemical analysis tests. The overall structure of the terminal box is compact and firm, and the observation window 13 of 10mm laminated glass is provided at the interval of the secondary equipment, which is convenient for the operation and maintenance personnel to observe the operation status of the internal secondary components.

The primary equipment is installed in the primary equipment interval, including a voltage transformer 7, a pressure relief sealing plate 6, a secondary wiring channel 10 and a grounding system 9, wherein the voltage transformer 7 is used for two functions: first, to collect the ring network The line voltage of the cabinet; the second is to provide operating power for the remote control circuit of the ring network cabinet. The pressure relief sealing plate 6 is installed at the rear of the primary chamber. If the voltage transformer 7 breaks down and produces a large amount of gas, its gas pressure can be released from here, thereby protecting the personal safety of the front of the box body. The secondary routing channel 10 is installed on the left side of the primary equipment interval, providing a dedicated routing channel for the secondary cables to ensure that the secondary equipment can still work normally after the primary equipment fails. The communication optical cable channel 8 is installed on the right side of the primary equipment compartment to provide a dedicated channel for the optical fiber to ensure that the communication system is isolated from the electrical system and avoid electromagnetic interference during signal transmission. The grounding system 9 is installed inside the box body of the primary room and extends to the outside of the box to ground the box body to ensure that the residual pressure in the ring main unit is eliminated after a power failure.

The intelligent power distribution automation measurement and control terminal 1, the network switch 3, the charging system 4, the optical fiber distribution frame 5, the temperature and humidity control system 11, the cable temperature measurement system 12, and the intelligent power distribution automation measurement and control terminal 1 are installed in the secondary equipment compartment. Carry out data sampling and monitoring, automatically detect and identify equipment failures, diagnose equipment status and perform remote maintenance; network switch 3 is used for network debugging and uploading; charging system 4 uses voltage transformer 7 to input 220V AC voltage to convert it into 24V DC voltage The output is supplied to the electric operating mechanism of the ring network cabinet, which is also used to realize the working time ≥ 24 hours after the external power failure, and supports 10 switching operations; the temperature and humidity control system 11 is used to detect the real-time temperature and humidity inside the terminal box. When the ambient temperature is not good Automatic heating and dehumidification function; cable temperature measurement system 12 is used to collect the temperature of the cable head in real time. When the primary device has an abnormal current, the cable temperature will rise sharply, and the cable temperature measurement system will send an alarm signal.

The new secondary terminal box is interactively connected with the ring network cabinet to realize the collection and transmission of three-remote data.

As shown in Figure 3, the box body 16 of the metal outdoor house adopts a modular design, and all of them are connected by bolts, which is convenient for assembly and easy to replace damaged parts; 2.0mm, with strong anti-corrosion ability; box parts are sheet metal components, riveted or bolted to each other without deformation welding, light weight, beautiful appearance. There are no fasteners on the surface of the box for disassembly, and the anti-theft performance is good. The top cover is an air interlayer double-layer structure with vents; the air inlet is set on the panel of the box and has a detachable dust filter; the air outlet is set on the top of the box and hidden under the eaves; forming Bottom-up air convection makes the box have good heat insulation and ventilation effects; the top cover has a drainage angle of 3 degrees, which has the effect of drainage; the bottom of the box has a sealed floor with cable inlets to prevent cable trenches Moisture inside enters the box. The door and the lifting lug are sealed with sealing strips; the door lock is a rainproof structure; when the door is opened, the limited drag hook makes the door easy to fix. Dimensions of metal outdoor room: width 850mm* depth 850mm* height 1600mm.

The new secondary terminal box of the utility model can realize functions such as data collection inside the primary equipment, equipment status monitoring, remote control operation, and data statistics, and the box room can be inspected and repaired separately without hindering the normal operation of the other box room. The real-time monitoring of equipment realizes the rapid location and isolation of fault points, and effectively solves the "blind adjustment" phenomenon of dispatching.

On the one hand, it is used to realize the functions of data signal collection, equipment status monitoring, remote operation, data statistics and other functions inside the primary ring network cabinet, to meet the basic needs of dispatching and operating personnel, to realize user interaction, and to improve the quality service level of the distribution network. On the other hand, due to the geographical limitation of the core area of the main city, the new secondary terminal box and the ring network cabinet have the same appearance and style, occupy a small area, and are easy to operate.

Claims (5)

1. novel secondary termination rack, uses for the ring main unit that coordinates peripheral hardware, and described ring main unit comprises an inlet wire interval and more than one operation range, it is characterized in that: described secondary terminals case comprises primary equipment interval and secondary device interval;

Described primary equipment is provided with voltage transformer and ground unit in interval; The input of described voltage transformer primary circuit connects the output of looped network cabinet wire spacing, and the output of Secondary Circuit of Potential Transformer connects respectively the remote control circuit in each operation range of ring main unit; On described primary circuit and secondary circuit, each series connection arranges a fuse; Ground unit is installed on the inner side at primary equipment interval and extends to case external ground;

In described secondary device interval, be provided with intelligent power distribution automatic measure control terminal, the network switch, charging system, temperature and humidity control system and cable temp measuring system; The input of described intelligent power distribution automatic measure control terminal connects respectively the secondary connection end of the current transformer of output, the ring main unit of output, the voltage transformer primary circuit of temperature and humidity control system and cable temp measuring system, the auxiliary contact that ring main unit divides combination switch; The input of the output interconnection network switch of intelligent power distribution automatic measure control terminal, the output of the network switch connects and transmits the net background of data to peripheral hardware; Aforesaid voltage instrument transformer is given each remote control circuit power supply by charging system, and described charging system comprises charger and storage battery, and the input of charger connects the secondary circuit output of voltage transformer, and its output connects and is storage battery and the power supply of each remote control circuit.

2. novel secondary termination rack according to claim 1, is characterized in that: the rear portion at primary equipment interval is also provided with pressure release shrouding.

3. novel secondary termination rack according to claim 1 and 2, is characterized in that: in primary equipment interval, be also provided with secondary cable tray and communication cable passage, secondary cable tray and communication cable passage are separately positioned on the left and right sides at primary equipment interval.

4. novel secondary termination rack according to claim 1 and 2, is characterized in that: between aforesaid primary equipment interval and secondary device interval casing and cabinet door, be provided with sealing strip.

5. novel secondary termination rack according to claim 1 and 2, is characterized in that: aforesaid secondary device is interval with the observation window of doubling glass, the position of observation window is corresponding with intelligent power distribution automatic measure control terminal display screen position.