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Christian Moya Master Thesis.pdf (981.35 KB)

ETD Abstract Container

Abstract Header

Hierarchical Framework for Demand-Side Frequency Control

Moya, Christian Bolivar
http://rave.ohiolink.edu/etdc/view?acc_num=osu1398950339

Abstract Details

2014, Master of Science, Ohio State University, Electrical and Computer Engineering.
This thesis develops a hierarchical framework for demand-side frequency control. First, we study the implementation of the hierarchical decentralized controller based on a reduced nonlinear multi-machine power system model in order to stabilize the system. The framework involves two decision layers. The supervisory layer determines a power control command for the aggregated power output response on each load bus using robust decentralized control theory. The device layer involves a large number of controllable loads, which switch probabilistically during contingencies based on a Markov-chain model, local frequency and angle measurements, so that the aggregated power output deviation from the controllable loads matches the desired droop amount according to the power control command determined in the supervisory layer. The proposed framework can deal with time-varying system operating conditions while respecting the physical constraints of individual devices. Realistic simulation results based on a 68-bus system are provided to demonstrate the effectiveness of the proposed strategy. Then, we extend the hierarchical implementation to a structure preserving multi-machine power system model with only frequency measurements. The idea of implementing primary frequency control through end-use devices is investigated. The hierarchical decentralized framework is implemented in order to provide the system with a droop-like response. The proposed framework enables the systematic design of practically implementable demand-side frequency controllers that can effectively increase the system damping. At the supervisory layer, the power control command characterized by a feedback gain is determined. This gain specify the desired aggregate power output response at each load if frequency deviates. This gain is periodically updated by taking into account the time-varying availability of end-use devices and the system oscillatory modes under different operating conditions. At the device layer, each end-use device changes its operating mode independently with certain probability that are calculated based on a Markov-chain model, the received control gain, and local frequency measurement. Simulation results based on a 13-bus system demonstrate the efficacy of the proposed demand-side primary frequency control strategy.
Wei Zhang (Advisor)
69 p.
Electrical Engineering

Recommended Citations

Citations

  • Moya, C. B. (2014). Hierarchical Framework for Demand-Side Frequency Control [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1398950339

    APA Style (7th edition)

  • Moya, Christian. Hierarchical Framework for Demand-Side Frequency Control. 2014. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1398950339.

    MLA Style (8th edition)

  • Moya, Christian. "Hierarchical Framework for Demand-Side Frequency Control." Master's thesis, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1398950339

    Chicago Manual of Style (17th edition)

osu1398950339
766
© 2014, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.