2 x600mw unit electrical design characteristics

Abstract: 2 x600mw unit electrical design characteristics of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1 overview that wujing eight period for 2 x600mw domestic import type coal-fired units project, and had the conditions of the two units of further expansion. The three big host are for the introduction of foreign technology production equipment in China. 2088 t/h boiler for Shanghai boiler factory furnace; Generator for motor factory in Shanghai. More flow meter manufacturers choose model price quote you are welcome to inquire, here are eight times that wujing 2 x600mw unit electrical design features the article details. 1 overview that wujing eight period for 2 x600mw domestic import type coal-fired units project, and had the conditions of the two units of further expansion. The three big host are for the introduction of foreign technology production equipment in China. 2088 t/h boiler for Shanghai boiler factory furnace; Generator for Shanghai electric products. Turbine for subcritical condensing turbine, rated power 600 mw, 674 mw, zui high-power Shanghai steam turbine factory manufacturing. Boiler room use outdoor layout; Steam turbine generating sets for longitudinal arrangement; Steel structure is used in the main workshop. Plant cooling water circulation way as the secondary circulation way with cooling towers. 1220 kv line two units of 600000 mw unit in current main transformer booster to 220 kv access system. 220 kv connection of double busbar with bypass, dedicated bypass circuit breaker. This 220 kv line for four times, including 2 back to # 1, # 2 generator in a main transformer into line, the other two back into high voltage utility/standby transformer into line. For this period, a total of four times, the other set aside two times. After considering the possibility of expansion, the current of 220 kv is, deputy busbar section reserved position. 2 distribution equipment selection plant is located in the region, and easy to make electrical equipment outside insulator contamination, or in the fog rain climate conditions can easily form dielectric conductive film on the insulator surface, leading to flashover. According to water and electricity department issued by the 'high voltage overhead line and substation electrical porcelain insulation they defiled classification standard', a plant anti-pollution levels should belong to class II ( Pollution level) , outside the power plant electrical equipment insulation leakage ratio should not be less than 25 mm/kV. Power plant site tension, air pollution is more serious. Thus we should not only covers an area of less, booster station layout and safe operation. Totally enclosed combined electrical appliances ( GIS） Covers an area of less, high security, is the solution of salt sludge and narrow covers an area of one of the solutions, but due to the large investment, in the actual use is limited by a lot. According to the system requirements, should choose the breaking current is 50 ka, rated current is 2500 a and above 220 kv equipment. 53 times or so. At the beginning of the examination and approval, the room of the conventional electrical equipment type distribution equipment. 3220 kv main equipment selection principle in the system, the importance of considering power plant 220 kv equipment in the circuit breaker, current transformers, isolation switches, capacitive wall casing for imported equipment, the rest such as voltage transformer, such as zinc oxide lightning arrester with domestic equipment. 4 distribution equipment layout of the project 220 kv power distribution device for the second house double column type structure, a total of 10 double spacing. 50 m, distribution equipment at both ends and the middle has a 3 m width of the stair. 1) Busbar system of power distribution equipment, vice, and bypass bus are LV— 21Y— 150/136 aluminum manganese alloy tubular busbar, carrying capacity can reach more than 3000 a and the v-shaped vertical suspension insulator string arrangement, busbar and distance is 2800 mm, busbar span of 12 m. The suspension method, it is soft connection structure of elastic absorption characteristics, under the effect of short-circuit electrodynamic force, the bus will produce a certain degree of rocking. In order to reduce the swing when short circuit, add a certain amount of extra load within tubular busbar ( Iron) , after calculation, when the short circuit current is 50 ka, short circuit when the horizontal and vertical displacement are within 250 mm, consider zui disadvantage, and at this time interval is above 2200 mm, can satisfy completely the requirements of security charged distance. It is this soft connection structure, avoids using a soft bus phase spacing requirements, bus level raised, the structure of complex problem, reduce the construction cost; When using the support insulator and overcome the short circuit of electric impact damage of porcelain insulator, and V pillar porcelain insulator string is only equivalent to the cost of a 1/4 & ndash; A third. According to the practical operation of power system for many years, the layout structure of bus no matter on cost, or in such aspects as safety running is desirable. 2) The interval width of equipment layout of power distribution device for 12 m, and distance are 3 m of the equipment. Due to the top and bottom layer of equipment adopt high arrangement, makes the usual operation, the patrol is safe, convenient and operator can see very clearly the exact state of operation object. But reasonable arrangement and maintenance of equipment, maintenance work and it's convenient.

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