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Group | south network strengthening disaster prevention security guaranteed issu
author：XiangGuo Group
time：2017-05-17
To seriously implement the national disaster prevention and mitigation planning deployment requirements, a few days ago, southern power grid company officially issued by the 28 key city special guaranteed power grid planning.During the period of "much starker choices-and graver consequences-in", the company will invest 26.9 billion yuan, according to standard against 50 years by a natural disaster, guaranteed 28 important city power grid planning and construction, improve power grid comprehensive disaster prevention security capacity building, lift the important urban core area, the key users under the condition of extreme natural disasters less power, a power outage.
Southern power grid company main measures: one is the reasonable planning of substation location, appropriate strengthen regional mutual supply ability, reduce the serious fault of important city's sphere of influence of power supply, ensure that a single 500 - kv site pressure loss, to avoid any municipal districts of the capital city and shenzhen full stop, a single 220 - kv site pressure loss, to avoid any of the southern area of the 15 main cities municipal districts full stop.Second, high standard configuration (transform) important users, including senior residents (high-rise) building large concentration areas key user power grid power supply, such as strong wind area, heavy ice important users of the power supply should be formed in two completely independent from different substation power supply path, ensure that the single stand pressure loss, a single path loss and serious fault under safe and reliable power supply.3 it is appropriate to improve guaranteed grid fortification standards, build strong disaster, rack.Coastal winds district power grid, the grid planning new guaranteed project, according to encounter weather in 50 years return period for construction, is expected to raise 220 kv and below overhead line wind capacity by 20% to 25%.Four is combined with city planning and development, the comprehensive utility tunnel construction requirements, such as guaranteed in coastal region, the line of cable modification, guaranteed substation household internalization transformation, as main form or disaster protection power supply to the core area of cable, the internalization of power supply path, appropriately raise the level of urban distribution network cabling.For heavy ice grid, guaranteed the line will melt device, ensure that under extreme natural disasters "rack not ruin" guaranteed power grid.
By implementing the above plan, by 2020, 28 major cities guaranteed grid average cover about 80% of the key users, scattered distribution of key users preferred by the emergency power supply or emergency mobile power to provide security;Guaranteed lines of 220 kv, site, on average, accounted for 33%, 40% respectively, guaranteed lines of 110 kv, site, on average, accounted for 16%, 21% respectively.
Southern power grid company main measures: one is the reasonable planning of substation location, appropriate strengthen regional mutual supply ability, reduce the serious fault of important city's sphere of influence of power supply, ensure that a single 500 - kv site pressure loss, to avoid any municipal districts of the capital city and shenzhen full stop, a single 220 - kv site pressure loss, to avoid any of the southern area of the 15 main cities municipal districts full stop.Second, high standard configuration (transform) important users, including senior residents (high-rise) building large concentration areas key user power grid power supply, such as strong wind area, heavy ice important users of the power supply should be formed in two completely independent from different substation power supply path, ensure that the single stand pressure loss, a single path loss and serious fault under safe and reliable power supply.3 it is appropriate to improve guaranteed grid fortification standards, build strong disaster, rack.Coastal winds district power grid, the grid planning new guaranteed project, according to encounter weather in 50 years return period for construction, is expected to raise 220 kv and below overhead line wind capacity by 20% to 25%.Four is combined with city planning and development, the comprehensive utility tunnel construction requirements, such as guaranteed in coastal region, the line of cable modification, guaranteed substation household internalization transformation, as main form or disaster protection power supply to the core area of cable, the internalization of power supply path, appropriately raise the level of urban distribution network cabling.For heavy ice grid, guaranteed the line will melt device, ensure that under extreme natural disasters "rack not ruin" guaranteed power grid.
By implementing the above plan, by 2020, 28 major cities guaranteed grid average cover about 80% of the key users, scattered distribution of key users preferred by the emergency power supply or emergency mobile power to provide security;Guaranteed lines of 220 kv, site, on average, accounted for 33%, 40% respectively, guaranteed lines of 110 kv, site, on average, accounted for 16%, 21% respectively.
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