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Geng Y.,China University of Mining and Technology | Wu X.,China University of Mining and Technology | Zhou D.,Navy Academe of Armament | Xu L.,China University of Mining and Technology | Qiao S.,Shanghai JiaoTong University
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2013

For three-phase four-wire PV-AF (photovoltaic power generation and active filter) system, a control strategy based on proportional resonant (PR) controller is proposed. Improved PR controllers in parallel are adopted to track fundamental current and different frequency component of harmonic current to obtain zero steady-state error. With the power of photovoltaic system injecting, the quality of grid current is improved. The performance of PR controller and improved PR controller are compared. After analyzing the effect of every parameter of PR on control performance, the parameters are designed. The simulation and experiment results indicate that the current inner-loop controller can be better adapted to the fluctuation of grid frequency and track reference current, which verify the validity and effectiveness of the employed control strategy.

Zhou D.-J.,Navy Academe of Armament | Mao R.-Q.,Representative Office of Naval Warship Design and Research | Zhuang Y.-P.,Navy Academe of Armament | Wang S.-M.,Tsinghua University
Communications in Computer and Information Science | Year: 2016

Modeling and Simulation is an effective way to predict the behaviors of Shipboard Integrated Power System (IPS). This paper presents the methods applying simulink blockset to building the models of twelve-phase synchronous machine and twelve-phase voltage-fed inverter, whereby the hybrid simulation method using SimPowerSystem blocks and Simulink models for the harmonic analysis of the IPS simulation is proposed. The results of the harmonic analysis of the system which is a system of the AC-DC-AC driving twelve-phase synchronous motor show that the convenient eleventh and thirteenth LC filters can improve deeply the Total Harmonic Distortion (THD) of line current in the AC source of system, and with the loads increased, the THD of the line voltage of the AC source is increased, on the contrary, the THD of the current of AC source is decreased. © Springer Science+Business Media Singapore 2016.

Zhou D.,Navy Academe of Armament | Zhuang Y.,Navy Academe of Armament | Ji L.,Navy Academe of Armament | Xu D.,Navy Academe of Armament | Li J.,704 Institute
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2011

It is very important to study medium frequency synchronous generator's excitation control strategy and application in shipboard, for it can guarantee the safe operation of special equipment in high quality 400 Hz medium frequency electrical system. In order to make the medium frequency synchronous generator terminal's transient voltage restores as quickly as possible under the circumstances of suddenly increased and decreased load, this paper analyzes regulating property of the transient voltage of medium frequency electrical system and puts forward PID with current feed-forward controlling algorithm for medium frequency brushless excitation system, which compensates the exciter time constant to some extent, decreases its delaying effect, and increases the small signal response bandwidth of the excitation system. The simulation and experimental results verify the effectiveness of the proposed algorithm, which demonstrate that the proposed control system has good dynamic stability and steady-state performance.

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