Total space required for a GIS is 10% of that needed for a conventional substation.Ģ. This problem can be solved by using gas insulated switchgear technology. Generally main load center of any place is situated at very congested place where, sufficient land for establishing conventional AIS is very hardly available.
Reduction in length of feeders Improvement of the quality of voltage regulation due to short length feeders Establishing a substation at load center is quite economical and profitable in following ways: It is very much required to establish a substation at load center. While selecting substation site, cost of substation considering land cost & its development needs to be examined with respect to the cost of transmission lines.ġ. Low noise transformers and reactors should be installed wherever station is near residential areas.Ĭommercial factor.
Out of various options available for locating an AIS substation, the choice which involves minimum forest encroachment by lines needs to be preferred. land rather than private land as the process may take less time. With strict laws on land acquisition, resettlement of PAPs (Project Affected Persons), greater attention is required for acquiring an AIS site. Land accusation and forest encroachment constitute the social and environmental factors. Water should be available be construction of substation as well as for drinking purpose. The availability of reliable power supplies for substation auxiliaries, and construction purpose should be examined. Other amenities such as medical, communication facilities etc. Easy access, amenities availability, reliable power & water supply constitute the infrastructural factors. Based on purpose substation may be transmission substation, distribution substation etc….Based on nature of dielectric medium a substation is of two types AIS and GIS There are various ways to classify a substation. These transformation and switching setups are generally known as electrical substations. Distribution of electrical power is done at lower voltage levels or as specified by consumer requirement.įor maintaining proper voltage levels at transmission and distribution level and for providing greater stability a number of electrical transformation and switching setups have to be created in between generating station and consumer ends. It is economical to transmit power at high voltage level. Power is generated at medium voltage level. Long and high voltage transmission networks are needed for this purpose. So it is necessary to transmit these huge power blocks from generating station to their load centers. These places may not be nearer to load centers where the actual consumption of power takes place. Depending upon the availability of resources these stations are constructed at different places. Power generating stations may be hydro, thermal or nuclear. Combined with a shore station, this system also offers port authorities and maritime safety bodies the ability to manage maritime traffic and reduce the hazards of marine navigation.Conventional substations (AIS)……continued AIS does this by continuously transmitting a vessels identity, position, speed and course along with other relevant information to all other AIS equipped vessels within range. Originally developed as a collision avoidance tool to enable commercial vessels to 'see' each other more clearly in all conditions and improve the helmsman's information about his surrounding environment. Its purpose is to help identify ships, assist in target tracking, assist in search and rescue operation, simplify information exchange and provide additional information to assist situational awareness (International Maritime Organization ( IMO), A 29/Res.1106). This is a digital positional awareness system operating in the Very High Frequency ( VHF) maritime band. AIS (Automatic Identification System) is the mariner's most significant development in navigation safety since the introduction of radar.
0 kommentar(er)
