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Faster-Than-Real-Time Hardware Emulation of Extensive Contingencies for Dynamic Security Analysis of Large-Scale Integrated AC/DC Grid
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- Author(s) / Creator(s)
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The rapid expansion of modern power systems
has brought a tremendous computational challenge to dynamic
security analysis (DSA) tools which consequently need to process
extensive contingencies. In this work, hardware emulation is
investigated to accelerate the DSA solution of a large-scale AC/DC
system deployed on the field-programmable gate arrays (FPGAs)
faster-than-real-time (FTRT) execution. Electromagnetic transient
(EMT) modeling of the DC grid is conducted since the
fast converter dynamics require a small time-step for accuracy;
in contrast, the transient stability (TS) simulation is applicable
to the AC grid which tolerates a much larger step size. To
coordinate the 2 different types of simulation, an interface based
on dynamic voltage injection is proposed to integrate the AC and
DC grids, in addition to maintaining a low hardware latency.
An emulation platform consisting of multiple FPGA boards is
established so that with a proper allocation it has a sufficient
capacity to accommodate the system under study which has 6
ACTIVSg 500-bus systems interconnected by a 6-terminal DC
grid. The efficacy of the proposed FTRT hardware emulation
platform is demonstrated by 2 case studies with more than 5500
contingencies analyzed in total, where an FTRT ratio of more
than 208 is achieved for the hybrid AC/DC grid, while it is over
277 times for a single 500-bus system. Furthermore, the FTRT
dynamic emulation results, including the security indices, are
validated by the simulation tool DSATools/TSAT. -
- Date created
- 2022-04-01
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- Type of Item
- Article (Published)