期刊名称：Bulletin of the Institute of Heat Engineering
印刷版ISSN：2083-4187
出版年度：2015
卷号：95
期号：1
页码：1
语种：English
出版社：Warsaw University of Technology
摘要：The Static Synchronous Compensator (STATCOM a.k.a. SVG) is widely used to regulate dynamic reactive powerand to solve dynamic voltage stability problems. Modeling shows that a cascaded STATCOM, which is composedof several cascaded H-bridges, not only has strong coupling characteristics when an LCL filter is added but it is alsoa non-linear, multivariable system. Therefore, its practical design and application are dicult to implement. In thispaper an internal decoupling control algorithm is introduced to provide independent control of the active and reactivecurrents. Decoupling control algorithms are proposed, and models and simulation of the decoupling are provided. Wedescribe the setting up of a simulation and experiments with a cascaded STATCOM based on combined circuit topologywith a multi-field programmable gate array (FPGA), and double-loop control algorithms with a current inner loop, anda capacitor voltage outer loop. To provide control of the current inner loop, proportional-integral (PI) and resonantcontrollers are used, having the control ability to cancel harmonics while compensating for the reactive power. Thispaper presents new current-tracing control models that compensate for the fundamental current and eliminate selectiveharmonics by adopting a d-q synchronous reference frame, and a discrete Fourier transform (DFT). Voltage balanceis realized by introducing modulation wave distribution strategies. Furthermore, both simulation and experiments areemployed to verify the feasibility and eectiveness of the control strategy.
其他摘要：The Static Synchronous Compensator (STATCOM a.k.a. SVG) is widely used to regulate dynamic reactive power and to solve dynamic voltage stability problems. Modeling shows that a cascaded STATCOM, which is composed of several cascaded H-bridges, not only has strong coupling characteristics when an LCL filter is added but it is also a non-linear, multivariable system. Therefore, its practical design and application are dicult to implement. In this paper an internal decoupling control algorithm is introduced to provide independent control of the active and reactive currents. Decoupling control algorithms are proposed, and models and simulation of the decoupling are provided. We describe the setting up of a simulation and experiments with a cascaded STATCOM based on combined circuit topology with a multi-field programmable gate array (FPGA), and double-loop control algorithms with a current inner loop, and a capacitor voltage outer loop. To provide control of the current inner loop, proportional-integral (PI) and resonant controllers are used, having the control ability to cancel harmonics while compensating for the reactive power. This paper presents new current-tracing control models that compensate for the fundamental current and eliminate selective harmonics by adopting a d-q synchronous reference frame, and a discrete Fourier transform (DFT). Voltage balance is realized by introducing modulation wave distribution strategies. Furthermore, both simulation and experiments are employed to verify the feasibility and eectiveness of the control strategy.
关键词：Cascaded H-bridge;Internal model decoupling;Resonant controller;Distribution of modulation;Double-loop control
Loading...
