The latest design prefabricated cubical substation aims at “saving time, land, worry and money”, and according to the concept of “standardized design, factory prefabrication, and integrated construction”, it has realized the mode of substation from “construction” to “procurement” change. It can be widely used in the construction of power grid substations, new energy power generation booster stations and substations in the industrial and mining fields. It can solve the problems of long construction period, large area and inconsistent process and installation standards for traditional substations, realizing the miniaturization of substations and greatly improving engineering. Construction efficiency and quality, and effectively reduce the cost of the whole life cycle.
Box-type substation features
The latest design prefabricated cubical substation has the characteristics of light weight, convenient installation and maintenance, beautiful appearance, etc. It is especially suitable for power transformation in industrial and mining enterprises, urban power distribution, parks, residential areas and other places. The box-type substation is mainly composed of electrical units such as multi-circuit high-voltage switch system, armored busbar, substation integrated automation system, communication, telecontrol, metering, capacitance compensation and DC power supply. It is installed in a moisture-proof, rust-proof, dust-proof, Rodent-proof, fire-proof, anti-theft, heat insulation, fully enclosed, movable steel structure box, mechatronics, fully enclosed operation, mainly has the following characteristics:
(1) Advanced, safe and reliable technology: The box body adopts the current leading technology and technology in China, the outer shell is generally made of galvanized steel, and the frame adopts standard container materials and production technology, which has good anti-corrosion performance, 20 years of non-corrosion, and inner sealing plate. The aluminum alloy gusset plate is used, the interlayer is made of fire-proof insulation material, and the air conditioner and dehumidification device are installed in the box. The operation of the equipment is not affected by the natural climate environment and external pollution, and can ensure normal operation in the harsh environment of -40℃～+40℃.
The primary equipment in the box adopts fully enclosed high-voltage switchgear (such as XGN type), dry-type transformer, dry-type transformer, vacuum switch, spring operating mechanism, rotary isolation switch and other equipment. The product has no exposed live parts, and is fully enclosed and fully insulated. The structure can completely achieve zero electric shock accidents, high safety, and the secondary use of microcomputer integrated automation system can realize unattended operation.
(2) High degree of automation: The whole station is intelligently designed, and the protection system adopts the microcomputer integrated automation device of the substation, which is installed in a decentralized manner, and can realize “four remotes”, namely telemetry, remote signaling, remote control, and remote adjustment. Each unit has an independent operation. It has complete relay protection functions, remote setting of operating parameters, control of humidity and temperature in the box and remote smoke alarm to meet the requirements of unmanned duty; according to needs, it can also realize remote image monitoring.
(3) Factory prefabrication: CIMC Yang Zhou Base as a container manufacturer, when designing, as long as the designer makes a main wiring diagram and design of the equipment outside the box according to the actual requirements of the substation, the box transformer provided by the manufacturer can be selected. Specifications and models, all equipment is installed and debugged in the factory at one time, which truly realizes the factory-like construction of substations and shortens the design and manufacturing cycle; on-site installation only requires box positioning, cable connection between boxes, outgoing cable connection, and protection value verification. , transmission test and other work that needs to be debugged, the entire substation only needs about 5 to 8 days from installation to operation, which greatly shortens the construction period.
(4) Flexible combination mode: The box-type substation has a relatively compact structure, and each box constitutes an independent system, which makes the combination method flexible and changeable, and the user can freely combine some modes according to the actual situation to meet the needs of safe operation.
(5) The investment is saved and the effect is quick: the box-type substation reduces the investment by 40% to 50% compared with the conventional substation of the same scale. Due to the selection of advanced equipment, especially the operation of oil-free equipment, it fundamentally solves the problem of the conventional substation. To avoid equipment leakage problems, the substation can implement condition maintenance, reduce maintenance workload, save operation and maintenance costs, and the overall economic benefits are very considerable.
(6) Small floor area: The latest design prefabricated cubical substation is selected, which is only 1/10 of the floor area of the substation of the same scale. It can be installed and put into production by making full use of the street center, square and factory corner, which is in line with the national land saving requirements. policy.
(7) Beautiful appearance, easy to coordinate with the environment: The box shell is made of galvanized steel plate and container manufacturing technology, and the appearance design is beautiful. On the premise of ensuring the reliability of power supply, by selecting the shell color of the box-type substation, it is easy to communicate with the surrounding environment. The environment is harmonious, especially suitable for urban construction, such as urban residential quarters, stations, ports, airports, parks, green belts and other densely populated areas. It can be used as both a fixed substation and a mobile substation.
(8) Unified construction mode: adopting prefabrication technology, unified-construction mode, standardizing design standards and equipment interfaces, on-site installation is simple and easy, and construction efficiency is improved.
(9) Short construction period: maximizing factory work and minimizing on-site work, the 110kV substation will be completed in 2 to 3 months after the equipment enters the site, and the 220kV substation will be completed in 4 to 5 months.
(10) Intelligent operation and maintenance technology: Advanced application functions such as remote monitoring technology, secondary equipment condition monitoring system, and equipment remote maintenance system ensure the safe operation of substations, and realize unattended and condition-based maintenance of substations.
Classification of box-type substations
(1) Assembled type: The high and low voltage complete sets and transformers are installed into metal boxes, and there are operating corridors in the high and low voltage power distribution devices. This kind of box transformer is relatively large and is rarely used now.
(2) Combined device type: instead of using the existing complete set of devices, the high and low voltage control and protection electrical equipment are directly put into the box to form a whole. The design is based on maintenance-free consideration, no operation corridor, and small box body. It is also called European box change or ordinary box change.
(3) Integrated type: Latest design prefabricated cubical substation simplifies the high-voltage control and protection devices, and installs the high-voltage and low-voltage power distribution devices and the main body of the transformer into the transformer tank together to form a whole, with a smaller volume, close to the same capacity oil-immersed transformer, and is a European style. 1/3 of the box change. Also known as American box change or compact box change.