University of South Wales Master of Sciences Thesis
Standalone hybrid generation system for the remote area of Thar, Pakistan
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Standalone hybrid generation system for the remote area of Thar, Pakistan • Pn = nominal power of single- or three-phase converter (VA) • Vn = nominal line-to-line AC voltage (Vrms) • f = fundamental frequency (Hz) • Ts = sample time (s) These Rs and Cs values are derived from the following two criteria: • The snubber leakage current at fundamental frequency is less than 0.1% of nominal current when power electronic devices are not conducting. • The RC time constant of snubbers is higher than two times the sample time Ts. Note that the Rs and Cs values that guarantee numerical stability of the discretized bridge can be different from actual values used in the physical circuit. Standalone hybrid generation system for the remote area of Thar, Pakistan CHAPTER-3: Load Profile And Preliminary Sizing of the HPS Elements. For isolated consumers, Solar-wind-diesel hybrid systems are undoubtedly interesting solutions for the electrification. The sizing of system elements is a very important part in which the demand and the supply should be synchronized. Oversizing of system elements result in their inefficient utilization and unwanted investment. When the system elements are undersized, the load demand might not be met and the system will fail to keep its balance, thus the need for proper sizing is important. The proposed system, including a properly sized battery, leads to a significant reduction of the fuel consumption and a properly designed PV-wind-diesel installation remarkably reduces the required battery capacity, in relation to a PV/wind-only based stand-alone system. For a proper design, the complete load demand profiles and resource profiles of the site have to be known first. In this chapter, typical load profiles are considered and the considered data of the renewable resources are applied to derive their respective powers per unit system. Thus, the preliminary approaches for the sizing of each system elements are developed and presented in this chapter. tải về 6.62 Mb. Chia sẻ với bạn bè của bạn:
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