Title :
Pipelined Numerical Integration on Reduced Accuracy Architectures for Power System Transient Simulations
Author :
Lilis, Georgios ; Kyriakidis, Theodoros ; Lanz, Guillaume ; Cherkaoui, Rachid ; Kayal, Maher
Author_Institution :
Electron. Lab. & Power Syst. Group, Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland
Abstract :
This work concerns a dedicated mixed-signal power system dynamic simulator. The equations that describe the behavior of a power system can be decoupled in a large linear system that is handled by the analog part of the hardware, and a set of differential equations. The latter are solved using numerical integration algorithms implemented in dedicated pipelines on a field programmable gate array (FPGA). This data path is operating in a precision-starved environment since is it synthesized using fixed-point arithmetic, as well as it relies on low-precision solutions that come from the analog linear solver. In this paper, the pipelined integration scheme is presented and an assessment of different numerical integration algorithms is performed based on their effect on the final results. It is concluded that in low-precision environments higher order integration algorithms should be preferred when the time step is large, since simpler algorithms result in unacceptable artifacts (extraneous instabilities).
Keywords :
difference equations; field programmable gate arrays; fixed point arithmetic; integration; pipeline arithmetic; power system simulation; FPGA; analog linear solver; differential equations; field programmable gate array; fixed-point arithmetic; higher order integration algorithms; low-precision environments; mixed-signal power system dynamic simulator; numerical integration algorithms; pipelined integration scheme; pipelined numerical integration; power system behavior; power system transient simulations; precision-starved environment; reduced accuracy architectures; Computational modeling; Equations; Iron; Mathematical model; Numerical stability; Power system stability; Stability analysis; Differential equations; Field programmable gate arrays; Fixed-point arithmetic; Numerical simulation; Numerical stability; Power system dynamics;
Conference_Titel :
Computer Modelling and Simulation (UKSim), 2014 UKSim-AMSS 16th International Conference on
Print_ISBN :
978-1-4799-4923-6
DOI :
10.1109/UKSim.2014.22