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《Transactions of China Electrotechnical Society》 2019-04
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The Research on Fully FPGA-Based Real-Time Simulation with High Fidelity and Low Cost for the Cascaded STATCOM

Zhu Jianxin;Hu Haibing;Lu Daorong;Yao Jianhui;Wang Sen;Xing Yan;Jiangsu Key Laboratory of Renewable Energy Generation and Power Conversion Nanjing University of Aeronautics and Astronautics;  
A fully field-programmable-gate-arrays(FPGA) based real-time simulation with high fidelity and low cost for the cascaded static synchronous compensator(STATCOM) is proposed in this paper. To improve the fidelity of the simulation with small time-step, a modified switching-function model is adopted to separate the active switches from the circuit network for computation effort reduction. With the help of external circuit voltage calculation and comparison logic, dead-time period can be covered to improve the precision of model simulation. The real-time detection of the H-bridge state ensures the unidirectional conductivity of diode to achieve the simulation accuracy. To take the hardware resource consumption and simulation step into account, serial and parallel combination design as well as deep pipelining technology is employed for the model implementation. The STATCOM of 12 cascaded H-bridges was implemented on a single FPGA chip of Cyclone IV EP4 CE115, and the simulation step can reach 0.85μs. The results of the Simulink/PSIM simulation and real system prototype experiment demonstrate the effectiveness of the proposed real-time simulation.
【Fund】: 国家自然科学基金资助项目(51577088)
【CateGory Index】: TM761.12
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