Tham khảo tài liệu 'wind farm impact in power system and alternatives to improve the integration part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 14 Wind Farm - Impact in Power System and Alternatives to Improve the Integration Voltage constraints Vi min Vi Vi max i 1 2 . Nb 13 Active and reactive power generator Pgi min Pgi Pgi .max i 1 2 . Ng 14 Qgi min Qgi Qgi max i 1 2 . Ng 15 Point of connection PCgi min PCgi PCgi max i 1 2 . Ng 17 Limits of power flow at each branch Si Si max 19 Reactive power capabilities constraints Stator side constraints Is I 20 s s maA X z V V 21 s vs max v -1- Rotor side constraints IR IR max 22 Vr Vr max 23 Grid side converter constraints S c. Srcr 24 GSC GSC no min al Case study The optimization strategy has been applied to a 34 buses distribution power system Fig. 6 Salama Chikhani 1993 . Three wind farms equipped with DFIG have been optimal allocate and var injection is optimal management in order to maximize loadability of the systems and minimize real power losses. Four different scenarios have been studied the first one represents the base case without WF the second scenery incorporate 3 WF to the distribution networks without reactive power capability the third one incorporate reactive power capability of WF corresponds to a cos .p leading or lagging finally the last scenery take into account the extended reactive power capability of DFIG incorporating reactive power capability of grid side converter. Table 2 shows the results obtained by the algorithm column 3 and 4 are the bus number where each WF should be located and the reactive power injected by each one. Column 5 to Impact of Wind Farms in Power Systems 15 8 represents voltage stability parameters the maximum loadability Ấcrit. for low limit operational voltage . percetange of loadability increase of the power system maximum loadability in the point of voltage collapse and increase in voltage stability margin define as the distance between the operational point and the point of voltage collapse. Finally column 9 and 10 show the real power losses and percentage decrease of real power due to optimal
