tailieunhanh - Wind Farm Impact in Power System and Alternatives to Improve the Integration Part 9

Tham khảo tài liệu 'wind farm impact in power system and alternatives to improve the integration part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Operation and Control of Wind Farms in Non-Interconnected Power Systems 189 Rhodes power system already presented above focusing on frequency control. The Rhodes power system has been used to address all the main issues related to system secure operation under different system conditions. The response of the wind farms in frequency disturbances is analyzed and the different characteristics of each wind turbine type related to frequency are described. Three different wind turbine configurations have been used -Active Stall Induction generator ASIG Doubly Fed Induction generator DFIG and Permanent Magnet Synchronous generator PMSG . An auxiliary control has been designed for the DFIG type to enhance the capability to support the frequency control. The load shedding following severe frequency disturbances is calculated and the under over-frequency protection relay settings are discussed under the novel system conditions. Results for different system conditions and control methods are presented and discussed focusing on the ability of modern wind turbine technologies to assist in frequency control in isolated power systems during severe disturbances in the production-consumption balance. As wind power penetration increases in modern power systems a variety of technical and regulatory issues regarding the interaction between large wind farms and power system is under constant discussion. The system operators are setting onerous requirements that that wind farms have to fulfill. Among these voltage and frequency control play an important role. Frequency control has started to appear as emerging need under increasing wind power penetration conditions and due to the extended replacement of conventional generators by large wind farms in power supply. The impact of wind farms in frequency phenomena is even more vital in non-interconnected power systems where the power system inertia is limited. It is often the case that when auxiliary services of wind turbines like frequency