Studies on a Hybrid Wind Turbine Generating System Using a Current‐Source Thyristor Inverter

Abstract

SUMMARYA practical-scale hybrid wind turbine generating system is developed for generating a constant output power even when the wind velocity fluctuates. The system consists of a wind turbine synchronous generator (SG), a rectifier, a current-source thyristor inverter, an SG driven by a prime mover, and a duplex reactor. A high-quality output voltage waveform is always obtained from the system, which has a very simple configuration. Experimental results show the feasibility of the system. A model of the system is also developed to predict the dynamic performance when the system conditions such as the wind velocity and load are changed, and good agreement between the simulated and experimental performance is observed, confirming the validity of the dynamic model. C⃝ 2014 Wiley Periodicals, Inc. Electr Eng Jpn, 188(1): 60-69, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com).

Studies on a hybrid wind turbine generator system considering surplus power

“…5. The difference between iinv and iLU flowed automatically in the armature winding [1] as in Fig. 5.…”

“…Rrotor are selected 1.0, 1.4, and 1.7m. The speedup gear ratio G, the swept area AW, the proportional coefficient Kd [1], and Rrotor are shown in Table IV. Fig.…”

“…However, a wind turbine generator system generally has difficulty in stable power supply because the velocity of natural wind changes all the time and the system output cannot always be kept constant. From this point of view, a hybrid wind generator system, which can provide arbitrary power regardless of a variation of wind velocity, has been proposed [1].…”

“…This system consists of a wind turbine, a wind turbine generator (Permanent Magnet Synchronous Generator, PMSG), a thyristor rectifier, a current-source thyristor inverter, a duplex reactor, a synchronous machine (SG/SM), a DC machine (DM/DG), a power converter and a battery. The system has an advantage of removing the output voltage distortion, which is appeared in the commutations of the thyristor inverter, with the function of the duplex reactor [1,2]. Fig.2 shows the power flow of the system.…”

Dynamic performances of a practical scale wind power plant consisting of series-connected ten wind turbine generators

“…1 shows the configuration of wind power plant discussed here. As in the figure, the plant consists of ten wind turbine generators (PMSGs) driven by wind turbines WT#1~#10, series-connected thyristor rectifiers, to which the outputs of the wind generators are connected, a current-source thyristor inverter, a synchronous compensator to provide reactive power for commutations of the thyristors, and a duplex reactor to eliminate the higher harmonics contained in the output of the inverter [7]. The rectified ten wind generator outputs are connected in series, and the unified DC output is fed to the current-source thyristor inverter through a DC transmission line.…”