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structure steel fabrication of transformer substation
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structure steel fabrication of transformer substation
As the name suggests, a substation is a place where the voltage is changed. It is the place where the voltage and current of electric energy are transformed, concentrated and distributed in the power system. In order to ensure the quality of electric energy and the safety of equipment, voltage adjustment, power flow (voltage, current and power flow direction and distribution of each node and branch in the power system) control and the protection of transmission and distribution lines and main electrical equipment are also required in the substation. According to the use can be divided into power substation and traction substation (electric railway and tram).
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In the national standard GB 50053-94 "10kv and below substation design specification" the definition of the term is "10kv and below the ac power supply after the power transformer voltage supply to electrical equipment", in line with this is the substation. A connection point in a power network for changing voltage, exchanging power, and gathering and distributing electrical energy. In a substation, there are distribution devices with different voltages, power transformers, control, protection, measurement, signal and communication facilities, and secondary circuit power supply, etc.
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Some substations are also equipped with shunt capacitors, shunt reactors, static reactive power compensation devices, series capacitor compensation devices, synchronous tuners, etc. Substation basic requirements are: (1) according to the power network planning clear substation type and role, and long-term and short-term construction scale (including the number of circuit and transformer capacity), so that the substation construction can play a role in strengthening the power network and meet the needs of power supply. (2) substation construction requirements of less land, do not occupy or occupy less arable land, and try to use wasteland. In the layout of power distribution equipment and the general layout of substation, we should take measures to occupy less land. (3) according to the type of substation, construction scale and role in the power network to determine the electrical main wiring, to improve the reliability of power supply, and to use simple electrical main wiring, in order to reduce construction costs and operating costs. (4) the facilities in the substation must be able to meet the requirements of operation safety and convenient maintenance, where prone to error operation of electrical equipment are required to install a locking device, to ensure the safety of personnel and equipment.
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