Bulk Power System Dynamics with Varying Levels of Synchronous Generators and Grid-Forming Power Inverters: Preprint

Conference · Thu Aug 22 00:00:00 EDT 2019

OSTI ID:1559424

Pierre, Brian J ^[1]; Villegas Pico, Hugo N ^[2]; Elliott, Ryan T ^[1]; Flicker, Jack ^[1]; Lin, Yashen  ^[3]; Johnson, Brian B ^[4]; Eto, Joseph H ^[5]; Lasseter, Robert H ^[6]; Ellis, Abraham ^[1]

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1. Sandia National Laboratories
2. Iowa State University
3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
4. University of Washington
5. Lawrence Berkeley National Laboratory
6. University of Wisconsin, Madison

Inverters using phase-locked loops for control depend on voltages generated by synchronous machines to operate. This might be problematic if much of the conventional generation fleet is displaced by inverters. To solve this problem, grid-forming control for inverters has been proposed as being capable of autonomously regulating grid voltages and frequency. Presently, the performance of bulk power systems with massive penetrations of grid-forming inverters has not been thoroughly studied to elucidate benefits. Hence, this paper presents inverter models with two grid-forming strategies: virtual oscillator control and droop control. The two models are specifically developed to be used in positive-sequence simulation packages and have been implemented in PSLF. The implementations are used to study the performance of bulk power grids incorporating inverters with grid-forming capability. Specifically, simulations are conducted on a modified IEEE 39-bus test system and the micro-WECC test system with varying levels of synchronous and inverter-based generation. The dynamic performance of the tested systems with grid-forming inverters during contingency events is better than cases with only synchronous generation.

• Research Organization: National Renewable Energy Lab. (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1559424
• Report Number(s): NREL/CP-5D00-74107
• Resource Relation: Conference: Presented at the 46th IEEE Photovoltaic Specialists Conference (PVSC 46), 16-21 June 2019, Chicago, Illinois
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
droop control
virtual oscillator control
grid-forming inverters
frequency control
inverter controls
photovoltaic inverters