Optimal distributed generation allocation on distribution networks at peak load and the analysis of the impact of volt/var control on the improvement of the voltage profile

Kim, Insu; Harley, R.G.; Regassa, Raeey

doi:10.1109/naps.2014.6965451

Cited by 11 publications

(6 citation statements)

References 6 publications

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“…These types of DG sources must be carefully evaluated to determine, depending on the topology and location, the best possible together with other important factors such as installed capacity and their location on the grid. The latter is of vital importance since an inadequate location can contribute to the unwanted injection of active and reactive power flows that could increase energy losses in the system and generate overvoltages in the two near the DG, in addition to high costs without achieving the proposed objectives [ 33 , 34 , 35 ]. The DG offers great benefits in the efficiency, stability and reliability of the distribution systems, especially in radial grids that travel long distances in which a small increase in the load capacity can destabilize the system with high disturbances and voltage drops.…”

Section: Main Textmentioning

confidence: 99%

Optimal reactive power compensation in electrical distribution systems with distributed resources. Review

Téllez

López

Isaac

et al. 2018

Heliyon

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In this paper an exhaustive bibliographical revision of the mathematical methods used for the optimal selection and location of reactive power compensating elements is developed, the results obtained by different authors for different objective functions are analyzed and a scientific problem in the conflict that the electric variables show when analyzed individually is identified; thus demonstrating the need to analyze this problem in a multi-criteria way and taking into account topologies of distribution grids with distributed generation and energy storage. This research demonstrates that reactive power compensation in distribution grids with distributed resources is a problem that must be analyzed from multiple criteria that consider several objective functions to be optimized; thus achieving a global solution that contemplates an optimal location and dimensioning of reactive power compensating elements that contribute to the joint improvement of the voltage profiles, minimization of power losses, harmonic mitigation, increased line capacity, voltage stability and power factor improvement, all of them to a minimum investment cost. A theoretical heuristic is also proposed to solve the described problem, based on the multicriteria optimization method.

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Section: Main Textmentioning

confidence: 99%

Optimal reactive power compensation in electrical distribution systems with distributed resources. Review

Téllez

López

Isaac

et al. 2018

Heliyon

View full text Add to dashboard Cite

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“…For example, between Q2 and Q3 in the range of 0.99 and 1.01 PU of voltage, the PV inverter injects only active power. However, if its bus voltage increases above V3 (e.g., 1.01 PU), the inverter absorbs reactive power, thus operating as an inductive load; and if the bus voltage decreases below V2 (e.g., 0.99 PU), the inverter provides reactive power like a capacitive load [14]. This study implements Volt/Var control on the inverter model used by OpenDSS [15], the set points of which are presented in TABLE I and the minimum and maximum reactive power values (Qmin and Qmax) are changed from ± 1.0 PU to ± 0.4 PU to avoid violating the maximum iteration constraint (for controllers) imposed by OpenDSS.…”

Section: Reactive Power Controlmentioning

confidence: 99%

“…Example of Volt/Var control[14].TABLE I. SET POINTS OF INVERTERS FOR VOLT/VAR CONTROL [5] Qmin = -0.4 ( = Q4 inFigure 1)…”

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confidence: 99%

The effect of the volt/var control of photovoltaic systems on the time-series steady-state analysis of a distribution network

Kim

Harley

Regassa

et al. 2015

2015 Clemson University Power Systems Conference (PSC)

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Grid-connected photovoltaic (PV) systems with relatively high capacity effectively reduce peak load, but because of their reverse power flow, they can cause overvoltage along a feeder that can exceed five percent of the rated voltage. Modern PV systems with the capability of Volt/Var control can mitigate overvoltage by either injecting or absorbing reactive power. Thus, the objectives of this study are to (1) model a distribution network (feeder J1 located in the northeastern United States and enhanced by thirteen PV systems) using OpenDSS; (2) use actual collected load profile data as input data to the simulation model and PV generation output data at 15-minute intervals; and (3) calculate the time-series steady-state power flow of the distribution network when PV systems generate or absorb reactive power. Finally, it addresses overvoltage resulting from the deployment of high-capacity grid-connected renewable PV systems and mitigation techniques for such overvoltage issues, particularly Volt/Var management and control. Index Terms--Photovoltaic (PV) systems, time-series steady-state power flow, and Volt/Var.

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“…The study optimally allocated four DG systems with their total capacity of 38 percent of the feeder rating when they inject only active power at the unity power factor. This study uses the optimal locations and capacities proposed by the study [9] as a scenario of high-penetration DG systems.…”

Section: Problem Statementmentioning

confidence: 99%

“…In this scenario, four optimal DG systems that minimize voltage variations from 1.0 PU in a steady state have a total capacity of 38 percent of 25 MVA (DG systems on bus 701, 732, 710, and 740 have 6, 11, 13, and 8 percent, respectively) [9]. TABLE IV shows the line-to-neutral voltages and the currents of ten representative buses of the test feeder enhanced by optimal DG systems with a capacity of 38 percent of the feeder rating at a load factor of 100 percent.…”

Section: High Penetration Of Dg Systemsmentioning

confidence: 99%

The analysis of voltage increase phenomena in a distribution network with high penetration of distributed generation

Kim

Harley

Regassa

et al. 2015

2015 Clemson University Power Systems Conference (PSC)

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Various distributed generation (DG) systems with capacities in the range of several kilowatts to tens of megawatts can increase voltage along a feeder when they are injecting power into distribution systems. Thus, the main objective of this study is to analyze the transient behavior of such a distribution system integrated by DG systems. This study (1) models the IEEE 37-bus test feeder as a distribution network enhanced by DG systems in Simulink of MATLAB; (2) proposes case studies of DG systems with their total capacity of 10 and 38 percent of the feeder rating; and then (3) simulates the transient behavior of the test feeder when DG systems inject active power at the unity power factor during a few cycles of 60 Hz. Finally, it addresses the issues of an increase in voltage resulting from the installation of DG systems in a transient state. Index Terms--Distributed generation (DG), transient behavior of a distribution network, and an increase in voltage

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Optimal distributed generation allocation on distribution networks at peak load and the analysis of the impact of volt/var control on the improvement of the voltage profile

Cited by 11 publications

References 6 publications

Optimal reactive power compensation in electrical distribution systems with distributed resources. Review

Optimal reactive power compensation in electrical distribution systems with distributed resources. Review

The effect of the volt/var control of photovoltaic systems on the time-series steady-state analysis of a distribution network

The analysis of voltage increase phenomena in a distribution network with high penetration of distributed generation

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