A Dynamic Master/Slave Reactive Power-Management Scheme for Smart Grids With Distributed Generation

Moursi, Mohamed Shawky El; Zeineldin, H. H.; Kirtley, James L.; Alobeidli, Khaled

doi:10.1109/tpwrd.2013.2294793

Cited by 82 publications

(37 citation statements)

References 27 publications

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“…In this study, in terms of voltage security, the criteria for choosing the best solution is designed to maximize the voltage margin (VM) of the most vulnerable bus to the low-voltage problem. In addition, the decision variable vector TP, which means the position of tap on the main transformer, and its corresponding constraint Equations (7) and (8) controlled discretely according to tap step, and OLTC can generally adjust the voltage by˘10% in 16 steps, with 17 positions [18][19][20]. Therefore, the optimization problem of the DNO on specifying the FPC can be described with the objective function described in Equation (2) subject to the Equations (5)- (8) as follows: max…”

Section: Specifying the Flexible Penalty Contract By The Distributionmentioning

confidence: 99%

Optimal Coordinated Management of a Plug-In Electric Vehicle Charging Station under a Flexible Penalty Contract for Voltage Security

Kim¹,

Kim

Jin

et al. 2016

Energies

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Abstract:The increasing penetration of plug-in electric vehicles (PEVs) may cause a low-voltage problem in the distribution network. In particular, the introduction of charging stations where multiple PEVs are simultaneously charged at the same bus can aggravate the low-voltage problem. Unlike a distribution network operator (DNO) who has the overall responsibility for stable and reliable network operation, a charging station operator (CSO) may schedule PEV charging without consideration for the resulting severe voltage drop. Therefore, there is a need for the DNO to impose a coordination measure to induce the CSO to adjust its charging schedule to help mitigate the voltage problem. Although the current time-of-use (TOU) tariff is an indirect coordination measure that can motivate the CSO to shift its charging demand to off-peak time by imposing a high rate at the peak time, it is limited by its rigidity in that the network voltage condition cannot be flexibly reflected in the tariff. Therefore, a flexible penalty contract (FPC) for voltage security to be used as a direct coordination measure is proposed. In addition, the optimal coordinated management is formulated. Using the Pacific Gas and Electric Company (PG&E) 69-bus test distribution network, the effectiveness of the coordination was verified by comparison with the current TOU tariff.

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Section: Specifying the Flexible Penalty Contract By The Distributionmentioning

confidence: 99%

Optimal Coordinated Management of a Plug-In Electric Vehicle Charging Station under a Flexible Penalty Contract for Voltage Security

Kim¹,

Kim

Jin

et al. 2016

Energies

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“…However, it does not address how the impacts of non-simultaneous operations of DG units and voltage regulating devices are minimized. Also, the rule and optimization based strategies proposed in [2], [3], [4], [5], [6] for maximizing DG voltage support and coordinating the voltage regulating devices and DG units do not clearly address how the proposed controls operationally perform for minimizing the impact of DG and voltage regulating device interactions when the distribution systems are subjected to structural changes and DG availability. There may be topology based limitations, which are clearly discussed in [2].…”

Section: Oltcmentioning

confidence: 99%

Online Coordinated Voltage Control in Distribution Systems Subjected to Structural Changes and DG Availability

Ranamuka

Agalgaonkar

Muttaqi

2015

IEEE Trans. Smart Grid

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The responses of multiple DG units and voltage regulating devices such as tap changers and capacitor banks for correcting the voltage may lead to operational conflicts and oscillatory transients, where distribution systems are subjected to network reconfiguration and changes in availability of the DG units. Therefore, coordinated voltage control is required to minimize control interactions while accounting for the impact of structural changes associated with the network. This paper proposes a strategy for coordinating the operation of multiple voltage regulating devices and DG units in medium voltage (MV) distribution systems, under structural changes and DG availability, for effective voltage control. The proposed strategy aids to minimize the operational conflicts by allowing the farthest voltage regulating device to operate first on a priority scheme designed based on the electrical-distance between voltage regulating devices and DG units, while maximizing the voltage support by the DG units. The proposed coordination scheme is designed to enact with an aid of a substation centered distribution management system (DMS) for online voltage control. The control actions of proposed coordination strategy are tested on a MV distribution system, derived from the state of New South Wales, Australia, through simulations, and results are reported. NOMENCLATURE OLTCOn-load tap changer SVRStep

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“…PV cells have different Maximum Power Points(MPP) under different conditions, so the boost circuit is used to change the duty cycle to adjust the operating voltage. The MPP of the PV cells is tracked using the 'Perturb & Observe' technique, which is widely studied and adopted at present [12].The second level is the control of the DC-AC converter .VSC inverter is used and the AC voltage is obtained based on direct power control.…”

Section: Lvrt Controlmentioning

confidence: 99%

Research on Low Voltage Ride through of the Grid-Connected PV System

Li¹,

Qian²,

Wu³

et al. 2015

Proceedings of the International Conference on Advances in Energy, Environment and Chemical Engineering

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Abstract. With the increasing capacity of PV systems in the grid, the grid-connected PV systems will have negative impacts on the grid in the case of a disturbance or a fault. In this study, a strategy of 'DC voltage control' is adopted. During the period of low voltage ride through (LVRT), the duty cycle of the boost circuit is adjusted to reduce the output power of the PV battery so that the DC side voltage will be limited. Also reactive power is provided according to the depth of grid voltage sags to support voltage recovery of the grid. Consequently LVRT is realized successfully. Finally, the control strategy is verified in MATLAB/SIMULINK.

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A Dynamic Master/Slave Reactive Power-Management Scheme for Smart Grids With Distributed Generation

Cited by 82 publications

References 27 publications

Optimal Coordinated Management of a Plug-In Electric Vehicle Charging Station under a Flexible Penalty Contract for Voltage Security

Optimal Coordinated Management of a Plug-In Electric Vehicle Charging Station under a Flexible Penalty Contract for Voltage Security

Online Coordinated Voltage Control in Distribution Systems Subjected to Structural Changes and DG Availability

Research on Low Voltage Ride through of the Grid-Connected PV System

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