Should a 110kv substation be built as an outdoor or indoor station?
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To build a factory around the mining area, an 110kv substation and two 40,000-kVA main transformers are required. Could everyone give some advice on whether it’s better to construct an outdoor or an indoor substation? The location is in the middle reaches of the Yangtze River – which option is more suitable there?
Distribution installations of 110 kV and above mostly use outdoor distribution installations. 110kv outdoor distribution devices are characterized by easy expansion, a short construction period, and ample clearance, which facilitates live working; however, they have disadvantages such as large floor space requirements and susceptibility to external environmental influences.
Substations with a capacity of 110 are generally designed to be installed outdoors; even in busy areas, they are placed in separate buildings, alongside other types of buildings, as it would be unsafe otherwise
I see everyone thinks it’s better outdoors, but I heard that the thunderstorm season in the south is quite long – will being outside be affected by that? From an investment perspective, outdoor stations are more cost-effective. From a safety standpoint, aside from the impact of weather conditions, are there any issues with the quality of components such as circuit breakers, PTs, and CTs? I am a humble learner with little knowledge; please give me some guidance!
It is necessary to build an 110kv substation; whether it should be an outdoor or indoor station. The location is in the middle reaches of the Yangtze River. I suggest that you conduct some research in this area, as that would be more scientific.
For outdoor stations, the reasons are clearly stated above. . The 110kV voltage level is high, limiting the distance for indoor substations. . For outdoor stations, the transformer can be placed in a separate building. . Just ensure proper lightning protection. .
It is usually considered to be built outdoors! Currently, 110KV systems generally use GIS systems, which offer higher reliability. Considering lifespan and operation and maintenance costs, it is certainly possible to build it indoors, but this will increase the investment, especially for domestic integrated equipment.
There’s no problem at all with frequent thunderstorms; the lightning protection system is quite simple – just installing a few lightning rods in the four corners of the station is sufficient. I’ve seen many 110KV and 220KV stations in the south, and it’s important to ensure proper drainage and lightning protection measures, which are similar to those used in the north. There are many good manufacturers of outdoor current transformers and voltage transformers both domestically and internationally, and there are also numerous manufacturers of sulfur hexafluoride circuit breakers, so there’s no need to worry about the weather conditions in the south. The safety and reliability of indoor stations are lower than those of outdoor stations.
I am also considering this issue. For an 110KV substation with two 31,500 KVA transformers, some people have suggested building an indoor substation; the initial investment is high, but no maintenance would be required in the future. I’m not sure if that’s accurate.
There is not much that needs to be maintained at outdoor stations either. Electrical tests are carried out both indoors and outdoors every year; other than that, there are devices such as current transformers, voltage transformers, transformers, circuit breakers, and disconnectors, but none of these require much maintenance.
Let’s build an outdoor substation; an 110KV substation requires a considerable amount of space. Would building an indoor substation result in higher costs? As for maintenance, there is little difference between indoor and outdoor substations.
Taking the following into account: determine which ones offer good value for money and are suitable for indoor use, while those that are not suitable for indoor use should be used outdoors. For example, the busbar section is located outdoors. Some can be semi-enclosed, such as transformers.