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Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators

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Added on  2021-07-13

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This chapter presents the technical data, magnetic circuit calculation, and efficiency comparison of Yeywa and theoretical designed hydrogenerators with a rated power of 230 MVA. It includes the stator winding table, partial magnetization characteristic, and vector diagram for normal load. The efficiency comparison shows that the theoretical design has a higher efficiency than Yeywa's design.

Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators

   Added on 2021-07-13

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40CHAPTER 3RESULTS AND CHARACTERISTICS OF THE YEYWA ANDTHEORETICAL DESIGNED HYDROGENERATORS3.1.Hydrogenerator (230 MVA) Basic DesignAs a first step, the hydrogenerator design with rated power 230 MVA will becalculated. It’s given technical data are shown in Table 3.1.Table 3.1. Technical Data of 230 MVA HydrogeneratorName of ParametersRatedValueUnitRated Capacity, rS230000kVARated Line Voltage, LV16kVRated Power Factor, cos0.85No. of Phase, m3Phase ConnectionY (Star)Rated Frequency, f50HzRated Speed, n142.9rpmInductive Reactance along the longitudinal axis, dx*0.76Damper Winding TypeComplete Longitudinal-transversalImplementationVertical SynchronousType with indirect air-cooling systemExcitationWith excitationFor the stator winding double-layered wave winding is chosen.504Z,p = 42and number of slots per pole per phase is fraction: 41dcbq (b = 3, c = 1, d = 1).
Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators_1
41The winding consists of 7t ― the general largest common divisor. Thewinding table is made up by the following data:727504'tZZ3721'tpp41qTable 3.2. Stator Winding Table (230 MVA)Figure 3.1. Double Layered Wave Winding of Theoretical Designed Hydrogenerator(230 MVA)[72Z', 3p', 3m, 4q, 10y, 14y2]No:of coilsin group444444444444444444No: of group in alternation123456781234567812Coils no:123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172Distribution per phaseAZBXCYAZBXCYAZBXCY
Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators_2
42The results of the magnetic circuit calculation at no-load condition are shownin Table 3.3. Magneto motive force 1,FFfandF, which are presented in the lastthree lines are calculated at28556fnF A. The characteristic (Full and Partial) andpartial magnetization characteristic at no-load are shown in Fig. 3.2 and Fig. 3.3.Table 3.3. Magnetic Circuit Theoretical Designed Calculation Results at No-loadCondition (230 MVA)zak11.0041.0741.0261.4791.87223fE0.511.1091.21.3PV, V9238''m1.4781.4471.3811.3241.256fk1.0381.0451.061.0741.092k1.0421.0431.0461.0481.051B, Т0.4680.931.0161.0851.157F, A12883255882795029859318301zB, Т1.0021.992.1732.3222.4751zH, A/m182109004521392806179060sh, m0.1531zF, A281668691814199273962zB, Т0.6581.3071.4281.5251.6262zH, A/m32010801590256045002zL, m0.0192zF, A6.0820.5230.2148.6485.51aB, Т0.6341.2691.411.5291.6611aH, A/m872613264146650.6220.4310.3650.3280.3011aF, A23.6649.20951.95559.44487.3921F, A129402732634949441665939910.00050.00610.00960.00020.00592
Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators_3
433zak'1.0041.0681.251.4791.866mB, Т0.7411.4991.7191.9372.235mH, A/m369227079502260064200mh, m0.3mF, A1116812385678019260mF, A1225507038561064fF, A13173285563803851801797232F, A23312313088763620324m, Wb0.6981.4131.621.8252.106, Wb0.5581.1171.2411.3460.462, Wb0.140.2960.3790.4790.644fxffFFF0.46111.3321.8142.792fxFFF110.4530.9571.2241.5472.08fxFFF0.4510.8960.9791.0461.115Figure 3.2. )*(),(),(1**FfFfFfEff at No-load Condition (230 MVA)
Results and Characteristics of Yeywa and Theoretical Designed Hydrogenerators_4

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