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This paper presents the analyzed results of an integrated offshore wind farm (OWF) and seashore wave farm (WAF) connected to an onshore large power grid through a high-voltage direct current (HVDC) link to simultaneously achieve power-fluctuation mitigation and dynamic-stability enhancement. The performance of the studied OWF is simulated by an equivalent aggregated 80-MW doubly-fed induction generator...
This paper presents both steady-state ad transient analyzed results of a hybrid large-scale offshore wind and marine-current farm connected to an onshore power grid via a high-voltage direct current (HVDC) link. The performance of the studied offshore wind farm (OWF) is simulated by an equivalent aggregated 80-MW doubly-fed induction generator (DFIG) while the operating characteristics of the studied...
This paper presents the analyzed results of using a static synchronous compensator (STATCOM) to perform both damping improvement and reactive power-voltage (Q-V) control of a large-scale wind farm (WF). The studied 80-MW WF consisting of forty 2-MW induction generators (IGs) is simulated by an equivalent 80-MW IG connected directly to a utility grid through an equivalent step-up transformer and an...
This paper presents the simulated and measured results of switching transients of the laboratory Microgrid system of the companion paper in Part I that implements a web-based monitoring system using an industrial PLC and campus internet. The studied laboratory Microgrid system consists of two wind induction generators, an AC-to-DC converter, a DC-to-AC inverter, a PV module, a UPS, and a battery module,...
This paper presents the effects of installing variable current-limit reactors (CLRs) and adjusting load tap changers (LTCs) on performance of a commercial wind farm in Taiwan using computer simulations. The companion paper in Part I demonstrates the field measured results, simulation model, and simulation results of the studied Jang-Bin wind farm with twenty-three 2-MW DFIG-type wind turbine generators...
This paper presents steady-state performance analysis of a commercial wind farm in Taiwan through field measurement results and computer simulations. The companion paper in Part II discusses the employment of current-limit reactors and load tap changers on power-quality improvement of the studied wind farm. With twenty-three 2-MW DFIG-type wind turbine generators, this wind farm is connected to the...
This paper presents the implementation and design of a power converter for an autonomous wind self-excited induction generator (SEIG) feeding an isolated load through the employment of a DSP-based rectifier-inverter circuit. The output voltage and frequency of the studied wind SEIG is inherently variable due to random fluctuation of wind-speed variation. A three-phase constant-voltage constant-frequency...
This paper presents the measured results of flickers generated by a commercial wind power generation system (WPGS) in Taiwan. The studied WPGS consisting of four identical 660 kW wind-turbine induction generators (WTIGs) is connected to an 11.4 kV bus inside a large petroleum-chemical industrial mill located at the middle coast of Taiwan. The field measured flickers contributed by four WTIGs and a...
This paper proposes a novel monitoring and control system for achieving real-time monitoring and control of a hybrid wind-PV-battery renewable energy system. The proposed system constitutes a supervisory control and data acquisition (SCADA) system that employs campus network of National Cheng Kung University integrated with a programmable logic controller (PLC) and digital power meters. The proposed...
This paper analyzes both dynamic and steady-state characteristics of a commercial wind power generation system (WPGS) containing four wind-turbine induction generators (WTIGs) connected to a utility grid using Matlab/Simulink. The simulated power-flow results are validated by comparing with the field measured results of the studied WPGS. Various steady-state results of the studied WPGS under different...
This paper presents the measured results and harmonics generated by a commercial wind power generation system (WPGS) consisting of four identical 660 kW wind-turbine induction generators (WTIGs). The studied WPGS is connected to an 11.4 kV bus inside a large petroleum-chemical industrial mill located around the middle coast of Taiwan. The field measured results of total harmonic distortion (THD) in...
This paper presents a novel scheme for performance analyses of a stand-alone three-phase delta-connected self-excited induction generator (SEIG) with only one excitation capacitor. An approach based on three-phase induction machine model is employed to derive dynamic equations of the studied SEIG. Three different configurations, single-phasing mode of operation, Steinmetz connection I, and Steinmetz...
A novel control scheme based on a digital signal processor (DSP) to coordinate an AC-to-DC converter and switched capacitors is performed for isolated self-excited induction generators (SEIG). A laboratory 2.2 RW (3 hp) induction machine driven by a brushless DC motor is employed as the studied SEIG. Three-phase system model is employed to establish a set of complete system dynamic equations for simulating...
This paper presents a novel control scheme using an industrial programmable logic controller (PLC) with a new fuzzy module to enhance the power factor and voltage of a hybrid wind/PV power generation system. The proposed scheme can automatically regulate both the power factor and voltage of a wind induction generator under various wind speeds. From the experimental results, it shows that the proposed...
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