Aggregation of Radial Distribution System Bus with Volt-Var Control

Hiroshi Kikusato, Taha Selim Ustun, Dai Orihara, Jun Hashimoto and Kenji Otani
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Hiroshi Kikusato: Fukushima Renewable Energy Institute, AIST (FREA), 2-2-9 Machiikedai, Koriyama 963-0298, Japan
Taha Selim Ustun: Fukushima Renewable Energy Institute, AIST (FREA), 2-2-9 Machiikedai, Koriyama 963-0298, Japan
Dai Orihara: Fukushima Renewable Energy Institute, AIST (FREA), 2-2-9 Machiikedai, Koriyama 963-0298, Japan
Jun Hashimoto: Fukushima Renewable Energy Institute, AIST (FREA), 2-2-9 Machiikedai, Koriyama 963-0298, Japan
Kenji Otani: Fukushima Renewable Energy Institute, AIST (FREA), 2-2-9 Machiikedai, Koriyama 963-0298, Japan

Energies, 2021, vol. 14, issue 17, 1-13

Abstract: The high penetration of the distributed energy resources (DERs) encourages themselves to implement grid-supporting functions, such as volt-var control. The quasi-static time-series (QSTS) simulation is an essential technique to evaluate the impact of active DERs on the grid. Meanwhile, the increase of complexity on the circuit model causes a heavy computational burden of QSTS simulation. Although circuit reduction methods have been proposed, there have been few methods that can appropriately handle the distribution system (DS) with multiple voltage control devices, such as DERs implementing volt-var control. To address the remaining issues, this paper proposes an offline bus aggregation method for DS with volt-var control. The method determines the volt-var curve for the aggregated bus on the basis of historical data to reduce error in the aggregated model, and its offline process solves the computational convergence issue concerned in the online one. The effectiveness of the proposed method is validated in the simulation using a Japanese low-voltage DS model. The simulation results show that the proposed method can reduce the voltage error and computational time. Furthermore, the versatility of the proposed method is verified to show the performance does not heavily depend on how to select historical data for model-building.

Keywords: advanced inverter; distribution system; IEC 61850-90-7; IEEE 1547; photovoltaic; power system modeling; power system analysis; reactive power control; voltage regulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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