tailieunhanh - From Turbine to Wind Farms Technical Requirements and Spin-Off Products Part 4

Tham khảo tài liệu 'from turbine to wind farms technical requirements and spin-off products part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 34 From Turbine to Wind Farms - Technical Requirements and Spin-Off Products Fig. 20. Voltage evolution during the field test and the simulation in phase A. Fig. 21. Comparison of the active power during field test and simulation. Fig. 22. Comparison of the reactive power during field test and simulation. Wind Farms and Grid Codes 35 Js the model validated Yes P samples with error . Q samples with error . Table 10. Validation results for the example. 7. Wind farm verification As it has been shown in section if the General Verification Process of the PVVC is followed a simulation study must be performed. The simulation tool used to verify wind installation according to PVVC must permit to model the electrical system components per phase because balanced and unbalanced perturbances must be analyzed. The simulated model to verify the installation must take into account the different components of the real system that is the wind farm FACTS and reactive compensating systems the step-up transformer the connection line and a equivalent network defined in PVVC. Fig. 23 shows the one line diagram of the network to be simulated. r -----------------1 I----------------1 I I EQUIVALENT i NETWORK I I MV HV PCC FAULT WIND FARM Fig. 23. One line diagram of the wind installation network. The PVVC establishes the external network model equivalent. This equivalent network reproduces the typical voltage dip profile in the Spanish electrical system that is a sudden increase in the moment of the clearance and a slower recovery afterwards. The profile for three phase voltage dips is shown in Fig. 24. Fig. 24. Voltage profile in the point of connection during the fault and the recovery. 36 From Turbine to Wind Farms - Technical Requirements and Spin-Off Products Wind farm modeling Wind farm models may be built with different detail levels ranging from one-to-one modeling or by an aggregated model that consists of one or few equivalent wind turbines and