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논문 기본 정보

자료유형
학술대회자료
저자정보
Heather Chang (National Renewable Energy Laboratory) Nathan Baeckeland (National Renewable Energy Laboratory) Abhishek Banerjee (Autonomous Systems and Control) Gab-Su Seo (National Renewable Energy Laboratory)
저널정보
전력전자학회 ICPE(ISPE)논문집 ICPE 2023-ECCE Asia
발행연도
2023.5
수록면
1,523 - 1,529 (7page)

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초록· 키워드

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Power systems are transforming with increasing levels of inverter-based resources (IBRs). This transformation requires critical roles of grid-forming (GFM) inverters replacing synchronous generators for bulk power system stabilization and ancillary services, also allowing flexible power system operation, such as microgrid that is operated by multiple GFM IBRs to achieve system resilience against contingencies. To realize the resilient power systems allowing flexible in-and-out operation of GFM IBRs potentially programmed with different primary controls, a synchronization method universally applicable, i.e., independent of control types, would be beneficial to ease the integration process, but it has not been actively studied. To fill the gap, this paper proposes a universal synchronization method that achieves a passive synchronization to enable a smooth transition in a grid with off-nominal system parameters, i.e., voltage and frequency. The logic proposed requires no modification on the primary control, thus applicable to any type of GFMs with a voltage reference input. To validate the concept, a simulation of an IEEE 13-bus benchmark system modified with 3 GFM inverters is presented. It simulates an inverter-driven black start scenario in which GFM inverters autonomously turn on and connect to the grid under heavy loading, using the synchronization logic. The case study demonstrates that GFM inverters can tune their voltage reference to smoothly synchronize without severe transients, and contribute to a seamless black start of the grid under unbalanced load conditions. Two GFM methods-Droop and dispatchable virtual oscillator control-are used for the demo to validate feasibility and interoperability of the passive synchronization.

목차

Abstract
I. INTRODUCTION
II. UNIVERSAL SYNCHRONIZATION FOR GFM INVERTERS UNDER OFF-NOMINAL CONDITIONS
III. SIMULATION RESULTS
IV. CONCLUSION AND FUTURE WORK
REFERENCES

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