University of South Wales Master of Sciences Thesis
Load profiles considered for the Thesis
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| 3.1. Load profiles considered for the Thesis
It is always important the understand the load demand first to design a system that provides enough power so that demand and the supply can be synchronized or power can be backed up to the storage bank for the peak load to avoid the black out or limit the use of fossil fuel generator, proper sizing of the system is very important. Two types of daily load profile are considered in this thesis. One of them is described as load profile- A that is mainly a daytime load and the second load is basically a night time load. The load profiles [25, 26] whose daily demand curves are shown below. The data are extrapolated to a 24-hour load profile and averaged into hourly values. Fig 3.1: Total estimated daily load profiles- A and B [25, 26]. The load profile-A [25] includes two parts: load profile for the administration/academic part and load profile for the residential part. The administration/academic part of the load profile requires high power during office hours (7:00 – 15:00hrs) and small lighting loads at the corridors are possibly left Standalone hybrid generation system for the remote area of Thar, Pakistan for the security lighting form 19:00 – 7:00 hrs. Furthermore, demand rises during early morning, lunch time and dinner time for breakfast, lunch and dinner activities respectively than the demand for other normal activities are indicated in Figure 4.1. The load profile-B [26] shows the high demand appears during nighttime. It explicitly accounts for the residential loads like in most rural areas, where power is consumed for lighting and other related activities. In this case, the operation of the load is for about 7 hours/day during nighttime. For the load profile shown in figure 3.1 we can see that during day time we requires around 100-150 kwh of power to match the load and during night time we requires around 250-300 kwh power the match the load so during day time we get mostly power from the sun and system is capable of generating maximum 100kwh from the PV which might will not to enough to match the load so we can use backed up power from the storage system to balance the load during peak periods and similarly in the night time we get mostly wind energy due to location meteorological reasons and wind generation system is capable of generating 300 kwh maximum hence it can easily manage the load but the good part is that, during night time the peak period is only for few hours where we have peak demand so we can save the remaining energy generated by the wind generation system to battery storage that can be used in the morning peak time to manage the load without using diesel generator. tải về 6.62 Mb. Chia sẻ với bạn bè của bạn:
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