单相级联H桥整流电路非线性控制策略

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Abstract A static coordinate based nonlinear optimal control strategy was presented for the single-phase cascade H-bridge(CHB)rectifier,serving as the input stage of the power electronic traction transformer,for its nonlinear and disturbed operating conditions.According to the nonlinear affine model of CHB and nonlinear differential geometric theory,the zero-dynamic control scheme based on partial feedback linearization was preferred.For the linear part,the feedback gain was optimized using the linear quadratic control method,and a resonant controller was added for achieving zero phase error tracking.For the zero-dynamic variable,the active disturbance rejection controller(ADRC)based on extended state observer was designed to improve its dynamic response under wide range of load disturbance.Experimental results show that the proposed control strategy has good performance in improving dynamic response under grid voltage and load disturbances,guaranteeing fast regulation and stability of grid current and dc voltage,meanwhile achieving unity power factor operation and dc voltage balance of each module.

Key words： Single-phase cascade H-bridge(CHB) static coordinate state feedback zero-dynamic active disturbance rejection controller(ADRC)

Received: 20 August 2016 Published: 20 June 2017

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TM464

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	Articles by authors
	Sun Yuwei
	Liu Jiaomin
	Li Yonggang
	Fu Chao
	Yang Zheming

Cite this article:

Sun Yuwei,Liu Jiaomin,Li Yonggang等. Nonlinear Control Strategy of Single-Phase Cascade H-Bridge Rectifier[J]. Transactions of China Electrotechnical Society, 2017, 32(11): 180-188.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I11/180

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