Real-time Simulation of Coordinated Sub-Transmission Volt-Var Control Tool under High Distributed PV Penetration

Conference · Thu May 07 00:00:00 EDT 2020

DOI:https://doi.org/10.1109/ISGT45199.2020.9087719· OSTI ID:1811903

Ghosal, Malini ^[1]; Vallem, Mallikarjuna R. ^[1]; Nguyen, Quan H. ^[1]; Ke, Xinda ^[1]; Vyakaranam, Bharat GNVSR ^[1]; Samaan, Nader A.  ^[1]; Aworo, Oluwafemi J. ^[1]; Bhattarai, Bishnu P. ^[1]

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1. BATTELLE (PACIFIC NW LAB)

With the rapid penetration of intermittent solar photovoltaic (PV) and other distributed energy resources (DER) into the grid, and subsequent changes in power flow patterns in both distribution and sub-transmission, voltage regulation is becoming a major challenge. It is prudent to leverage PV and DER to provide ancillary services to the grid, such as voltage regulation. Recently, a quasi-static, coordinated real-time sub transmission volt-var control algorithm (CReST-VCT) was developed for voltage regulation under high PV penetration by dispatching the reactive power settings of the shunt devices and PV inverters. The algorithm was validated offline, on a quasistatic study. Such quasi-static dispatching algorithms cannot guarantee its performance for highly nonlinear dynamical power systems. In this paper the performance of the algorithm is validated with a real time nonlinear dynamic simulation of a modified IEEE 118 bus system in Opal-RT. The real time simulation is used to emulate the actual system operation, providing a more realistic testing environment for CReST-VCT. The dispatch and control signals are communicated between the power system (Opal solver) and the control center (GAMS solver) in real-time with a MODBUS bridge. The results demonstrate i) system is stable with the new dispatch points ii) significant improvement in system-wide voltage profiles compared to an uncontrolled scenario. Another significant contribution of the work is developing a framework for dispatchable, long duration dynamic simulations that can be leveraged for market/dispatch studies.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1811903
• Report Number(s): PNNL-SA-147277
• Resource Relation: Conference: Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT 2020), February 17-20, 2020, Washington DC
• Country of Publication: United States
• Language: English

Related Subjects

CReST-VCT
Opal-RT
Volt/Var Control
renewable integration