Numerical Oscillation Prevention for PV Inverter Controllers in Quasi-Steady-State Simulators

Conference · Mon Sep 09 00:00:00 EDT 2019

DOI:https://doi.org/10.1109/PESGM40551.2019.8973451· OSTI ID:1603350

Duwadi, Kapil ^[1]; Dos Reis, Fernando B. ^[1]; Mahat, Rupak ^[1]; Fourney, Robert ^[1]; Tonkoski, Reinaldo ^[1]; Hansen, Timothy M. ^[1]; Bhattarai, Bishnu P. ^[2]

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1. South Dakota State University
2. BATTELLE (PACIFIC NW LAB)

Droop-based PV inverter control methods are popular for preventing overvoltage in low voltage networks with high installations of PV solar. Quasi-steady-state simulators (QSTS) can be used to reduce the computational burden of conducting long-term techno-economic analyses of such PV inverter controllers. If dynamic models for droop-based controllers are directly implemented in QSTS, numerical oscillation occurs and the controllers fail to converge to their steady-state operation. In this paper, a power network sensitivity-based algorithm is proposed for preventing numerical oscillation while implementing active and reactive droop-based PV inverter controllers in quasisteady state simulation tool (e.g. in GridLAB-D). Convergence of the sensitivity-based algorithm is verified using a typical radial distribution feeder. It is found that all three controllers reached converged state in less than 15 iterations.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1603350
• Report Number(s): PNNL-SA-139435
• Country of Publication: United States
• Language: English

Related Subjects

GridLAB-D
PV inverter control
quasi-steady-state simulation