期刊
IET RENEWABLE POWER GENERATION
卷 12, 期 9, 页码 981-991出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-rpg.2017.0680
关键词
linear systems; feedback; permanent magnet generators; synchronous generators; wind power plants; maximum power point trackers; transient response; power generation control; machine vector control; power generation faults; voltage-source convertors; closed loop systems; power system stability; passivity-based linear feedback control scheme; permanent magnetic synchronous generator-based wind energy conversion system; maximum power point tracking; MPPT; generator-side voltage source converter; grid-side VSC; fault ride-through capability; FRT capability; storage function; transient responses; auxiliary input; tracking error convergence; closed-loop system stability; stochastic wind speed variation; vector control
资金
- National Natural Science Foundation of China [51477055, 51667010, 51777078]
This study designs a passivity-based linear feedback control scheme of a permanent magnetic synchronous generator-based wind energy conversion system, which attempts to achieve a maximum power point tracking (MPPT) at generator-side voltage source converter (VSC) and enhance fault ride-through (FRT) capability at grid-side VSC simultaneously. A storage function is constructed based on the passivity theory, in which the actual role of each term is meticulously investigated while the beneficial ones are remained so as to significantly improve the transient responses. Then, an auxiliary input is employed in the form of linear feedback control to ensure a desired tracking error convergence. Moreover, the closed-loop system stability is thoroughly analysed, together with a detailed physical interpretation of the storage function. Three case studies are undertaken including step change of wind speed, stochastic wind speed variation, and FRT. Simulation results verify that the proposed approach can effectively achieve MPPT and dramatically improve the FRT capability under various operation conditions against that of vector control and feedback linearisation control.
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