Decentralized secondary voltage control using voltage drop compensator among power plants

Silva, Rui Jovita G.C. da; Souza, Antônio Carlos Zambroni de; Leme, Rafael Coradi; Sonoda, Dabit G.

doi:10.1016/j.ijepes.2012.10.009

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…This is an important feature regarding this control. Commonly, secondary control is implemented by impedance compensation [34] or the pilot bus concept. However, they are meant to transmissions systems, driving one to select adequately the generators to play reactive power redispatch.…”

Section: Proposed Algorithmmentioning

confidence: 99%

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Centralised secondary control for islanded microgrids

Nascimento

Souza

Marujo

et al. 2020

IET Renewable Power Generation

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Electric power systems have undergone substantial changes in their operation. The higher penetration of renewable resources, demand response capability, and generators operating via droop control at the distribution level are the main features resulting in the microgrid concept. Microgrids must operate connected or islanded from the main grid, ensuring reliability and quality in the supply of energy in both operating scenarios. In this sense, the secondary control becomes essential in the system's resilience, since it is responsible for restoring the frequency and voltage within acceptable values. This study proposes a unified frequency and voltage secondary controls for microgrids operating in islanded mode. For this sake, a modification in the load flow algorithm considering a Jacobian matrix takes place, enabling a sensitivity analysis to give the adjustments in the set point of generators. The help of the Levenberg-Marquardt method improves the convergence in the modified load flow. All generators are continuously considered in this process, regarding their capabilities and relative control sensitivities concerning the operation point restoration. The proposed methodology is validated in a modified IEEE-37 node test feeder, showing the efficacy of the centralised secondary control under different scenarios of renewable generation penetration and load levels.

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Section: Proposed Algorithmmentioning

confidence: 99%

“…Some studies are focusing on secondary control in transmission systems [23,34]. In this case, the idea is to control the voltage level in a specific area of interest.…”

Section: Introductionmentioning

confidence: 99%

Centralised secondary control for islanded microgrids

Nascimento

Souza

Marujo

et al. 2020

IET Renewable Power Generation

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“…According to [10], when the fault occurs the time constant T di will plus a uncertain part ΔT di and become T di + ΔT di , and from equation (1), (2), (4), (11), and the inequalities (12), (13) the system of ith generator has the following form:ẋ…”

Section: Model Formulationmentioning

confidence: 99%

“…If the controller only focus on the phrases of system, there would be varies of post-fault value from the pre-fault value. This problem has been discussed in the article [6], in which the voltage instability originating in a mid-term time-scale stage and the transient instability trol [7], automatic voltage regulator combined with a power system stabilizer [8], static switching controller [10], or hierarchical controller based on wide-area signals [11]. But all these control method need to know the turning point of transient period and post-transient period, which is hard to ¿x.…”

Section: Introductionmentioning

confidence: 99%

Transient stability and voltage regulation in wide area power grid using switching controller

Yang

Cheng

Liu

et al. 2014

Proceedings of the 33rd Chinese Control Conference

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In this paper, the voltage regulation and transient stability of the multi-machine power systems are studied via decentralized switching controller. In most existing works, voltage and frequency stability of the multi-machine power systems are controlled by different controllers in different periods of power systems operation. The linearized model of the power system is established, and it takes both phase and voltage as parts of the feedback states. The switching controller is designed as an universalize robust controller in terms of linear matric inequality (LMI). The simulations are given to show that each generator can achieve transient stability and voltage regulation by implementing the proposed controller.

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“…In [5], the authors present the benefits that can be achieved by using a coordinated secondary voltage control applied to a transmission and subtransmission system of an electric power utility in South of Brazil. A decentralized SVC methodology is employed in [6] by using an effective adjustment at the joint line drop compensator to control the voltage level in a point far from the power plant.…”

Section: Introductionmentioning

confidence: 99%