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Your search keyword '"Huanyu Zhao"' showing total 2 results
Start Over Author "Huanyu Zhao" Topic electric potential
2 results on '"Huanyu Zhao"'

1. Active Power Filter DC Bus Voltage Piecewise Reaching Law Variable Structure Control.

Author

Baolian Liu, Zujun Ding, Huanyu Zhao, and Defei Jin

Subjects
ELECTRIC power filters, DIRECT currents, ELECTRIC potential, MATHEMATICAL variables, STABILITY theory, ELECTRICAL load
Abstract

The DC bus voltage stability control is one key technology to ensure that Active Power Filter (APF) operates stably. The external disturbances such as power grid and load fluctuation and the system parameters changing may affect the stability of APF DC bus voltage and the normal operation of APF. The mathematical model of DC bus voltage is established according to power balance principle and a DC bus voltage piecewise reaching law variable structure control algorithm is proposed to solve the above problem, and the design method is given. The simulation and experiment results proved that the proposed variable structure control algorithm can eliminate the chattering problem existing in traditional variable structure control effectively, is insensitive to system disturbance, and has good robustness and fast dynamic response speed and stable DC bus voltage with small fluctuation. The above advantages ensure the compensation effect of APF. [ABSTRACT FROM AUTHOR]

Published
2014
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2. Improved one-cycle control algorithm for diagnosis and optimization in low-voltage SVG device.

Author

Zujun Ding, Baolian Liu, Huanyu Zhao, and Yulin Zhang

Subjects
*STATIC VAR compensators, *ELECTRIC potential, *ELECTRIC inverters, *REACTIVE power, *ELECTRIC currents
Abstract

Nowadays low voltage SVG (Static Var Generator) has got a certain amount of practical applications. Current PWM control is a key unit of SVG control process. Taking the three-phase four-leg inverter for research object, this paper designs the current controller base on one-cycle control algorithm and derivates the control equation in detail. Aimed at the problem of control shocks existing in traditional one-cycle control, the improved control unit is given out with the fundamental positive sequence active component of load current as control objectives. This improved control unit could realize reactive power, harmonics, and negative sequence imbalance current comprehensive compensation function, and duty cycle stability are improved. Control performance and response time of the control unit were significantly optimized. The proposed improved one-cycle control unit was validated in terms of simulation and experiment result, and has high practical value of low-voltage SVG application. [ABSTRACT FROM AUTHOR]

Published
2017
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