Wide-Area Demand-Side Control for Inter-Area Oscillation Mitigation in Power Systems

Lian, Jianming; Zhang, Qian; Marinovici, Laurentiu; Fan, Rui; Hansen, Jesper Rohr

doi:10.1109/tdc.2018.8440257

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…One solution to mitigate the impact of LFOs, is to limit the magnitude of power transfer in critical tie-lines in order to reduce the stress in the system, however this results in the under-utilization of transmission line infrastructure [23], [24]. The modulation of demand side load has also been proposed in literature to damp LFOs [24]- [27]. The main idea is to remotely control end-user loads in response to LFOs.…”

Section: Introductionmentioning

confidence: 99%

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Baruwa

Fazeli

2021

IEEE Trans. Power Syst.

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The low-frequency oscillations (LFOs) inherent in power systems will be impacted by the increasing penetration of renewable energy sources (RESs). This paper investigates the impact of virtual synchronous machine (VSM) based RESs on the LFOs in power systems. A detailed two-machine test-bed has been developed to analyze the LFOs which exists when VSMs replace synchronous generators. The characteristics of the LFO modes and the dominant states have been comprehensively analyzed. Furthermore, this study analyzes the LFO modes which exists in an all-VSM grid. The role of the power system stabilizers in the all-VSM grid has been comprehensively evaluated. The IEEE benchmark two-area four-machine system has been employed to corroborate the results of the small-signal analysis and observe the transient performance. The analysis in this paper have been performed in MATLAB/SIMULINK environment.

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Section: Introductionmentioning

confidence: 99%

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Baruwa

Fazeli

2021

IEEE Trans. Power Syst.

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“…However, damping controllers are usually designed for merely one or a few selected operation points of the system and may not work well if unexpected operation scenarios are encountered in practice, especially in a system with high penetration of intermittent renewables. The potential of controlling load to improve rotor angle stability was explored in [35]- [37]. These studies proposed to use fast load response (at sub-second time scale) to damp electromechanical oscillations of the system.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Power Flow Control in Smart Grids: Enhancing Rotor Angle and Frequency Stability with Demand-Side Flexibility

Duan,

Chakraborty,

Nishikawa

et al. 2021

Preprint

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Large-scale integration of renewables in power systems gives rise to new challenges for keeping synchronization and frequency stability in volatile and uncertain power flow states. To ensure the safety of operation, the system must maintain adequate disturbance rejection capability at the time scales of both rotor angle and system frequency dynamics. This calls for flexibility to be exploited on both the generation and demand sides, compensating volatility and ensuring stability at the two separate time scales. This article proposes a hierarchical power flow control architecture that involves both transmission and distribution networks as well as individual buildings to enhance both small-signal rotor angle stability and frequency stability of the transmission network. The proposed architecture consists of a transmission-level optimizer enhancing system damping ratios, a distribution-level controller following transmission commands and providing frequency support, and a building-level scheduler accounting for quality of service and following the distributionlevel targets. We validate the feasibility and performance of the whole control architecture through real-time hardware-in-loop tests involving real-world transmission and distribution network models along with real devices at the Stone Edge Farm Microgrid.

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“…The idea of using end-use loads on the demand side to damp inter-area oscillations has been proposed previously [24]- [26]. In [24], [25] a novel device-level control strategy was proposed to deliver the aggregator-level load modulation signal. However, the aggregator-level load modulation signal used in [24], [25] is identical to that in [21] which is determined by a proportional control based on the feedback of frequency difference (note that the work in [21] uses an HVDC link as the actuator).…”

Section: Introductionmentioning

confidence: 99%

Damping of Inter-Area Oscillations via Modulation of Aggregated Loads

Wilches-Bernal

Byrne

Lian

2020

IEEE Trans. Power Syst.

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Low frequency electromechanical oscillations can pose a threat to the stability of power systems if not properly addressed. This paper proposes a novel methodology to damp these inter-area oscillations using loads, the demand side of the system. In the proposed methodology, loads are assigned to an aggregated cluster whose demand is modulated for oscillation damping. The load cluster control action is obtained from an optimal output feedback control (OOFC) strategy. The paper presents an extension to the regular OOFC formulation by imposing a constraint on the sum of the rows in the optimal gain matrix. This constraint is useful when the feedback signals are generator speeds. In this case, the sum of the rows of the optimal gain matrix is the droop gain of each load actuator. Time-domain simulations of a largescale power system are used to demonstrate the efficacy of the proposed control algorithm. Two different cases are considered: a power imbalance and a line fault. The simulation results show that the proposed controllers successfully damp inter-area oscillations under different operating conditions and with different clustering for the events considered. In addition, the simulations illustrate the benefit of the proposed extension to the OOFC that enable load to provide a combination of droop control and small signal stability augmentation.

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Wide-Area Demand-Side Control for Inter-Area Oscillation Mitigation in Power Systems

Cited by 5 publications

References 15 publications

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Hierarchical Power Flow Control in Smart Grids: Enhancing Rotor Angle and Frequency Stability with Demand-Side Flexibility

Damping of Inter-Area Oscillations via Modulation of Aggregated Loads

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