A mixed-platform framework for Dynamic Stability Assessment

Abstract

Abstract-This paper describes a mixed-platform framework dedicated to Dynamic Stability Assessment of power systems. DSA refers to tools capable of characterizing the dynamic stability of the system. Time domain simulation is critical for DSA analysis and is done by algorithms known as TD engines. In this work, operations are shared between a software platform and a hardware one. TD simulation is handled by a dedicated mixed-signal electronics implementation. Data flow control, user interfacing, configuration, result post-processing and other auxiliary operations are realized in software. This architecture combines the flexibility of the software with the highperformance of dedicated hardware. Results of a multicontingency analysis and a critical clearing time determination analysis for sample test cases are presented. It is demonstrated that an increase in speed of almost three orders of magnitude can be achieved, compared to single-platform solutions.

Mixed-signal power system emulator extension to solve unbalanced fault transient stability analysis

“…However, for high voltage transmission systems, the hypothesis that the resistive part of the lines impedance is negligible with regard to the reactive one is extensively used [3][4]. Modifying (2) according to this assumption shows that the system reduces to two uncoupled networks.…”

“…generators and loads, are handled by dedicated digital computing hardware that is interfaced to the analog part through an array of analog to digital (A/D) and digital to analog (D/A) converters. This architecture achieves massive parallelization, and hence greatly overperforms traditional software solvers that run on generalpurpose computer hardware (three orders of magnitude faster for n-1 dynamic stability assessment (DSA) reported in [2]). …”

Pipelined Numerical Integration on Reduced Accuracy Architectures for Power System Transient Simulations

“…However all of the aforementioned are in the digital domain. The authors of this work have explored the use of analog (unconventional) computing as a means of solving the linear system [4][5]. The sparse matrix Y is handled by an analog lattice computer that is briefly described in section III.…”

“…In order to tackle the problem in a computationally efficient way, the authors have been recently involved in the development of a transient simulator that is not based on general purpose computing units but on dedicated hardware instead [4][5]. This platform combines an analog and a digital computer part, i.e.…”

“…The analog part acts as an extremely parallelized linear system solver with very promising timing results [4][5][6]. However, imprecisions in the solution of the linear system are introduced by the imperfect reconfigurable elements (potentiometers, switches) and converters (ADCs, DACs) of the analog computer.…”