基于预测算法的自由活塞内燃直线发电机高效控制策略

doi:10.19595/j.cnki.1000-6753.tces.L90412

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Abstract The free piston linear generator(FPLG) has many advantages, such as wide fuel range, less mechanical friction loss and adjustable compression ratio. However, due to the influence of multiple factors on the piston trajectory, the operating conditions are extremely complex, so the output power and generation efficiency are difficult to improve. In this paper, an efficient control strategy based on predictive algorithm is proposed for FPLG: Through the prediction algorithm, the expected instantaneous power is calculated, and the accurate voltage vector is applied by SVPWM, so as to reduce the power loss and improve the generation efficiency. Compared with the traditional direct power control, this strategy aims at the high frequency and time-varying generation characteristics of the FPLG. On the one hand, it overcomes the efficiency loss caused by the PWM switch signal delay, on the other hand, it reduces the noise and loss caused by the switch frequency which is not fixed. The control system model based on Matlab / Simulink is built, and the two algorithms are simulated and compared under the real condition of the FPLG. The results show that the proposed strategy improves the output power and efficiency of the system, and verifies the correctness of the proposed strategy.

Key words： Free piston linear generator prediction algorithm power control

Received: 09 July 2020

PACS:

TM314

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	Li Zheng
	Qiu Shuheng
	Chen Feixue
	Zhang Chi
	Xiao Shide

Cite this article:

Li Zheng,Qiu Shuheng,Chen Feixue等. Efficient Control Strategy Based on Predictive Algorithm for Free Piston Linear Generator[J]. Transactions of China Electrotechnical Society, 2022, 37(zk1): 43-49.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90412 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/Izk1/43

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