Wide-area Demand-side Control for Inter-area Oscillation Mitigation in Power Systems

Conference · Mon Apr 16 04:00:00 EDT 2018

DOI:https://doi.org/10.1109/TDC.2018.8440257· OSTI ID:1512718

Lian, Jianming ^[1]; Zhang, Qian ^[1]; Marinovici, Laurentiu D. ^[1]; Fan, Rui ^[1]; Hansen, Jacob ^[1]

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1. BATTELLE (PACIFIC NW LAB)

Inter-area oscillations have severely limited maximum power transfer among different areas in large-scale interconnected power grid. If not quickly damped as soon as possible, they may cause system breakup and even lead to large cascading blackouts. To increase the damping of inter-area oscillations, both power system stabilizer~(PSS) and flexible AC transmission system~(FACTS) controller have been widely considered, which affect the real power flow indirectly. However, the effectiveness of these controllers is restricted to the neighborhood of a prescribed set of operating conditions. In this paper, wide-area demand-side control is developed to directly modulate the real power of end-user loads for oscillation mitigation. The proposed control strategy is implemented in a hierarchical manner. At the device layer, individual end-user loads independently turn ON or OFF in response to the broadcasted signals from the coordinator during the real time. At the supervisory layer, autonomous responses of end-user loads are coordinated to ensure the desired power modulation. The effectiveness of the proposed wide-area demand-side control in improving small-signal stability is illustrated by simulations on a large-scale test system.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1512718
• Report Number(s): PNNL-SA-128554
• Country of Publication: United States
• Language: English