Maximal electric power generation from varying ocean waves with LC-tuned reactive PTO force
CoRR(2024)
摘要
The reactive Power Take Off (PTO) force is the key to maximizing mechanical
power absorption and electric power generation of Wave Energy Converters (WECs)
from ocean waves with variable frequency, but its study is limited due to its
difficulty in physical realization. This paper presents a simple yet effective
LC-tuned WEC that generates a tunable reactive PTO force from tunable
inductor L and capacitor C in the WEC. A complete closed loop system model
of the WEC is derived first, then three quantitative rules are obtained from
analyzing the model. These rules are used to tune the LC network, and hence
the reactive PTO force that drives the WEC, to resonate with the input wave
force and generate maximal electric power over a range of wave frequencies.
Mathematical analysis of the WEC and tuning rules reveals the analytical and
quantitative descriptions of the WEC's mechanical power absorption, active and
reactive electric power generation and power factor, optimal electric
resistance load, and the generator and LC capacity requirements. Simulation
results show the effectiveness and advantages of the proposed WEC and verify
the analysis results.
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