Statistical inference of multivariable modal stability margins of time-delay perturbed power systems

Esquivel, P.; Romero, Gerardo; Ornelas‐Tellez, Fernando; Reyes, E.N.; Castaneda, Carlos E.; Morfin, O. A.

doi:10.1016/j.epsr.2019.106186

Cited by 2 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first perspective presented above fails because it considers time-delays as a dead-time phenomenon, as in a chemical process; in the second perspective, the complexity of WAMS is considered, but no capitalization of the valuable information available from the communication process is carried out. Generally, recent investigations suffer from misconceptions in modeling and simulating scenarios of time-delay performance [24][25][26]. Following with the literature revision, the authors in [27] obtain worthy results using buffers and a widearea power oscillation damper (WPOD) to compensate for delays and packet dropouts; nevertheless, the implementation is based on a straightforward model for single-input single-output applied in a Double-Fed Induction Generator (DFIG).…”

Section: Introductionmentioning

confidence: 99%

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

et al. 2021

View full text Add to dashboard Cite

Time-delay is inherent to communications schemes in power systems, and in a closed loop strategy the presence of latencies increases inter-area oscillations and security problems in tie-lines. Recently, Wide Area Measurement Systems (WAMS) have been introduced to improve observability and overcome slow-rate communications from traditional Supervisory Control and Data Acquisition (SCADA). However, there is a need for tackling time-delays in control strategies based in WAMS. For this purpose, this paper proposes an Enhanced Time Delay Compensator (ETDC) approach which manages varying time delays introducing the perspective of network latency instead dead time; also, ETDC takes advantage of real signals and measurements transmission procedure in WAMS building a closed-loop memory control for power systems. The strength of the proposal was tested satisfactorily in a widely studied benchmark model in which inter-area oscillations were excited properly.

show abstract

Section: Introductionmentioning

confidence: 99%

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Each area in the multi‐area power system is linked by contact line interfaces, and the contact line interfaces communicate through a dedicated or open communication channel. Because of the unavoidable communication delays, such as packet loss, disorder and bandwidth limitation, it will degrade the performance of the operating system and may make the power system confusion 7,8 . In recent years, LFC with time delays has been studied.…”

Section: Introductionmentioning

confidence: 99%

H _∞ distributed frequency control with unknown communication delays and parametric uncertainties

Zhang

Liu

Sun

et al. 2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary This paper studies the distributed load frequency control problems for the multi‐area interconnected power system in smart grid. Compared with current results, we develop a new model transformation for traditional interconnected systems with unknown communication time delays and uncertainties. The load frequency control problem becomes the state synchronization problem of multi‐agent system (MAS) consisting of linear double‐integrator system with uncertainties and delays. Then, the H∞ distributed controller is designed based on the new MAS model, which weakens the impact of communication delays, parametric uncertainties, and load disturbance. Meanwhile, the proposed distributed controller only needs its neighbors' information and some rough information about the communication network to achieve the frequency's synchronization. In addition, the power flow in the power system can achieve the power scheduling and peak regulation with the changes of each area's load, which can cause unacceptable frequency deviation. The switching topologies are used to express this new power flow distribution. The corresponding distributed controllers are designed to achieve the frequency's synchronization. Finally, simulation result shows the effectiveness of the proposed methods.

show abstract

Statistical inference of multivariable modal stability margins of time-delay perturbed power systems

Cited by 2 publications

References 36 publications

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

H _∞ distributed frequency control with unknown communication delays and parametric uncertainties

Contact Info

Product

Resources

About

Statistical inference of multivariable modal stability margins of time-delay perturbed power systems

Cited by 2 publications

References 36 publications

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

H ∞ distributed frequency control with unknown communication delays and parametric uncertainties

Contact Info

Product

Resources

About

H _∞ distributed frequency control with unknown communication delays and parametric uncertainties