Distributed Reactive Power Feedback Control for Voltage Regulation and Loss Minimization

Bolognani, Saverio; Carli, Ruggero; Cavraro, Guido; Zampieri, Sandro

doi:10.1109/tac.2014.2363931

Cited by 229 publications

(193 citation statements)

References 43 publications

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“…The physical meaning of the matrix X is widely discussed in [10,11]. One of the properties of X is that the product .e h e l / > X.e h e l / corresponds to the effective impedance from node h 2 V to node l 2 V. The following result follows directly from Lemmas 3 and 4 in [11].…”

Section: The Microgrid Control Problemmentioning

confidence: 93%

“…In the following, we will make the following assumptions on the microgrid parameters. These assumptions have already been used in [10,11] and are accurate for actual operation conditions in real microgrids.…”

Section: Mathematical Model Of a Microgridmentioning

confidence: 99%

“…The cost we consider encompasses two possibly conflicting objectives: (i) minimize the cost of active power from the grid and (ii) minimize the transmission losses in the transmission lines present in the microgrid. Minimizing transmission losses is a significant objective in OPF, and it has been considered in several works [3,7,10,11]. Thus, the cost function is given by…”

Section: The Microgrid Control Problemmentioning

confidence: 99%

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On distributed reactive power and storage control on microgrids

Cortés

Martínez

2016

Intl J Robust & Nonlinear

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SUMMARYThis manuscript develops a dual decomposition algorithm for the distributed control of reactive power and charging/discharging rates in microgrids with distributed solar generation and \storage capacities. Our setting considers physical constraints inherent to storage systems and voltage regulation constraints with the objective of minimizing a cost function that encompasses two aspects: the total cost of the active power consumed by the microgrid and its associated transmission losses over a finite time horizon. We provide a complete analysis of the convergence of the proposed algorithm and introduce a novel approach for the distributed approximation of the voltage prediction over the power grid. Simulations demonstrate the performance of the dual decomposition algorithm on a particular microgrid case.

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Section: The Microgrid Control Problemmentioning

confidence: 93%

Section: Mathematical Model Of a Microgridmentioning

confidence: 99%

Section: The Microgrid Control Problemmentioning

confidence: 99%

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On distributed reactive power and storage control on microgrids

Cortés

Martínez

2016

Intl J Robust & Nonlinear

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“…A potential drawback of the optimization problem (23) is that the number of decision variables grows linearly with T , in general. Still, one can compute a feasible solution to problem (22) in time that is independent of the time horizon T via the construction of a conservative inner approximation.…”

Section: B Control Design To Enable Real-time Implementationmentioning

confidence: 99%

“…There is, however, no guarantee on the constraint-satisfaction of these methods in finite time. Distributed optimization methods, on the other hand, rely on the explicit exchange of information between neighboring controllers in computing reactive power injections from PV inverters [17]- [23]. Given the satisfaction of certain requirements on the communication network specific to the optimization method being used, the sequence of reactive power injection profiles computed using these distributed optimization methods is guaranteed to converge asymptotically to a globally optimal solution of the OPF problem.…”

Section: Introudctionmentioning

confidence: 99%

Real-time Voltage Regulation in Distribution Systems via Decentralized PV Inverter Control

Lin¹,

Thomas²,

Bitar³

2018

Proceedings of the 51st Hawaii International Conference on System Sciences

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Abstract-We consider the decentralized reactive power control of photovoltaic (PV) inverters spread throughout a radial distribution network. Our objective is to minimize the expected voltage regulation error, while guaranteeing the robust satisfaction of distribution system voltage magnitude and PV inverter capacity constraints. Our approach entails the offline design and the online implementation of the decentralized controller. In the offline control design, we compute the decentralized controller through the solution of a robust convex program. Under the restriction that the decentralized controller have an affine disturbance feedback form, the optimal solution of the decentralized control design problem can be computed via the solution of a finite-dimensional conic program. In the online implementation, we provide a method to implement the decentralized controller at a timescale that is fast enough to counteract the fluctuations in the system disturbance process. The resulting trajectories of PV inverter reactive power injections and nodal voltage magnitudes are guaranteed to be feasible for any realization of the system disturbance under the proposed controller. We demonstrate the ability of the proposed decentralized controller to effectively regulate voltage over a fast timescale with a case study of the IEEE 123-node test feeder. I. INTROUDCTIONThe installation of rooftop and community solar facilities continues to increase in the United States. In California, for example, approximately 40% of all electricity demand was served by solar energy on the afternoon of to the large inrush current that results during switching operations [4]. Photovoltaic (PV) inverters, on the other hand, do not suffer from these limitations. Their reactive power injections can be actively controlled at a timescale that is fast enough to counteract the fluctuation in demand and PV active power supply. Our objective in this paper is to develop a systematic approach to the design of decentralized controllers for PV inverters, in order to effectively regulate network voltage profile in real-time, while guaranteeing the robust satisfaction of network and individual inverter constraints.Related Work: A large swath of literature treats the reactive power management of PV inverters as a centralized optimal power flow (OPF) problem, which aims to minimize a network-wide objective function (e.g., voltage regulation error) subject to network and resource constraints [5]- [10]. To set its reactive power injection, each PV inverter communicates its local measurements of demand and PV active power supply to a central computer. Using this data, the central computer solves a centralized OPF problem, and subsequently transmits the optimal solution back to each inverter for local implementation. Due to the rapid variation in the active power supply from PV resources, the reactive power injections of PV inverters need to be updated repeatedly over a fast time-scale (e.g., every minute). In the presence of a large number of PV inverters, the imp...

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Impact and assessment of the overvoltage mitigation methods in low‐voltage distribution networks with excessive penetration of PV systems: A review

Hamza

Sedhom

Badran

2021

Int Trans Electr Energ Syst

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This paper presents an overview of the impact of high penetration of photovoltaic (PV) systems in low-voltage distribution networks (LVDNs). High integration of solar PVs in the LVDNs has severe implications on the system parameters, efficiency, and stability. This paper also introduces the methods that have been driven to overcome these effects to preserve the steady-state conditions in the system during excessive penetration of PV generation units. A comparison between the contributions and shortcomings of the most recent researches for overvoltage mitigation strategies has been driven. Also, it includes comparing different overvoltage mitigation methods to handle the impact of the overvoltage under high penetration of PV units in the LVDNs. Besides, it presents a comparison between overvoltage mitigation methods based on their pros and cons.

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Distributed Reactive Power Feedback Control for Voltage Regulation and Loss Minimization

Cited by 229 publications

References 43 publications

On distributed reactive power and storage control on microgrids

On distributed reactive power and storage control on microgrids

Real-time Voltage Regulation in Distribution Systems via Decentralized PV Inverter Control

Impact and assessment of the overvoltage mitigation methods in low‐voltage distribution networks with excessive penetration of PV systems: A review

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