Abstract
Wind Turbine Generator (WTG) has become one of the most popular renewable-based power generation that is broadly connected to electricity grids worldwide. Till the year 2019, the total WTGs installed worldwide reached about 650.8GW. The WTG is interfaced to the electricity grid through power electronic converters with a proper control algorithm to facilitate a smooth power delivery as well as maintaining the system voltage and frequency stability during wind intermittency. However, power grids are usually subjected to load expansion which affects the stiffness of the grid and hence its stability. A weak electricity grid exhibits voltage instability that may affect the performance of WTGs and in some cases may lead to serious damages to the wind turbines and the entire system. In this paper, superconducting magnetic energy storage (SMES) technology based on fuzzy logic controller is implemented to effectively resolve this issue and improve the overall performance of WTGs. Hysteresis current and fuzzy logic-based control system is proposed to control the energy exchange between the SMES coil and the investigated system. Results show the effectiveness of the SMES to improve the overall system performance and along with the fault ride-through capability of the doubly-fed induction generator (DFIG).
Highlights
In the last decade, electric power generation from nonfossil fuel resources has been given much concern by worldwide nations that allocated a significant portion of its budgets to finance and develop renewable energy-based projects
The global installation of Wind Turbine Generator (WTG) has reached about 650.8 GW at the end of 2019, which was slowed down in 2020 due to Covid-19 [1]
Based on [4], doubly-fed induction generator (DFIG) has occupied 50% of the total installed wind energy conversion systems (WECS) which makes it dominating the total installations among the other types of WTGs worldwide
Summary
Electric power generation from nonfossil fuel resources has been given much concern by worldwide nations that allocated a significant portion of its budgets to finance and develop renewable energy-based projects. Due to the day-by-day increase in the loads, electricity grids are becoming less stiff as no more synchronous generator-based power plants are connected to support the grid [10] This situation will affect the WTG performance, especially when a DFIG is used due to the sensitivity of these generators to the grid characteristics, faults and disturbance events [11]. This includes high-temperature superconductors connected to the converters dc-link, superconducting magnetic energy storage (SMES) unit, unified power flow controllers, static synchronous series compensators and static compensator (STATCOM) [18,19,20,21,22] These FACTS devices are employed to enhance the fault ride-through (FRT) capability of WTG-DFIGs, smoothen generated power fluctuation and improve the power quality [20,21,22]. It has fast response that makes it applicable for grid-tied WECS to maintain the continuous operation of the generator during faults and disturbance events
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