Distributed Generation Hosting Capacity Evaluation for Distribution Systems Considering the Robust Optimal Operation of OLTC and SVC

Wang, Shouxiang; Chen, Sijia; Ge, Leijiao; Wu, Lei

doi:10.1109/tste.2016.2529627

Cited by 242 publications

(141 citation statements)

References 43 publications

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“…By controlling on‐line tap changer (OLTC) at the substation, the allowable DG penetration level may be increased . The tap position ( Tp ) of OLTC can change between lower tap (Tp min ) and upper tap (Tp max ).…”

Section: Objective Function and Its Constraintsmentioning

confidence: 99%

A combined probabilistic modeling of renewable generation and system load types to determine allowable DG penetration level in distribution networks

Naghdi

Shafiyi

Haghifam

2018

Int Trans Electr Energ Syst

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Summary Determining the penetration level of the distributed generation (DG) is an effective tool to site and size DGs in distribution networks. A multiobjective function of optimizing the DG penetration level, subject to constraints including short circuit capacity, voltage limits, transformer capacity, reverse power flow, and congestion of lines, is introduced to minimize the real and reactive losses and to ensure the voltage stability considering the variations of loads, different locations and power factors of DGs, and statistical nature of DG powers especially renewable energy resources. This optimization is performed based on a combined probabilistic modeling of the chronological behavior of wind speed, solar irradiance, and load with different types. The dynamical behavior of the compensators and on‐load tap changers is modeled by optimization subfunctions. An improved bee algorithm is used through conducting searches in the neighboring areas based on a new nonlinear function for a higher fitness and coherency speed.

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Section: Objective Function and Its Constraintsmentioning

confidence: 99%

A combined probabilistic modeling of renewable generation and system load types to determine allowable DG penetration level in distribution networks

Naghdi

Shafiyi

Haghifam

2018

Int Trans Electr Energ Syst

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“…Loads and DG units are not usually connected to the first bus of the feeder. If the voltage regulator like on load tap changer is installed at the first bus, the voltage magnitude of the first bus is kept constant (ie, Δ| V 1 |=0) …”

Section: Subroutines Of Optimization Functionmentioning

confidence: 99%

“…The results of the proposed algorithm to 33‐bus and 118‐bus systems are seen in Tables and , respectively. The 33‐bus system has 2 SVCs at buses 25 and 32, and SVCs are located on buses 25, 59, and 84 in 118‐bus system. Three D‐STATCOMs are installed at buses 12, 25, and 30 in 33‐bus system, and the 118‐bus system has 4 D‐STATCOMs at buses 38, 47, 91, and 109 .…”

Section: Sample Study Casementioning

confidence: 99%

“…Although SVC is cheaper than other compensators such as TCSC, STATCOM, and UPFC, and more expensive than capacitor banks, it has a flexible, controllable response in changing the unacceptable voltage values in critical situations of the modern distribution networks featured by the presence of different dispersed stochastic nature sources that usually require fast dynamic control . A mixed‐integer linear programming approach was proposed in Wang et al to optimize the DG hosting capacity of the grid while considering the operation of the on load tap changers and SVCs; however, in its objective function, the effect of the DG DF on the reactive power of SVC has not been taken into account. The D‐STATCOM is a developed FACTS device which is employed to improve the voltage profile, power factor, and voltage stability .…”

Section: Introductionmentioning

confidence: 99%

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Quadratic optimization method for a dual index combination of the penetration level and the dispersion factor of the distributed generation

Naghdi

Shafiyi

Haghifam

2018

Int Trans Electr Energ Syst

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Summary Increasing integration of local generators is a challenge in the planning, design, and operation of the distribution system. The distributed energy resources, especially renewable ones, have caused dispersion of generation units along the feeder. This paper presents a dual index combination of the penetration level and the dispersion factor of distributed generation. Maximum penetration level of distributed generation was determined by a multiobjective function of the proposed dual index. This function has subroutines based on voltage stability, active and reactive power flows, voltage profile limits, and power loss that are restricted by technical constraints associated system with shunt compensator. A limited memory quasi‐Newton trust‐region algorithm was developed to optimize the objective function by using the first‐ and second‐order sensitivities of the nonlinear objective function and a trust region based on the constraints. Two networks were used for testing, and obtained results revealed accuracy and validity of the proposed method.

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“…In many countries, the OLTC is operating to control only the voltage of the bus connected to the transformer. However, as the use of electric power facilities becomes more important due to the recent rapid increase in electric power consumption worldwide, research on the efficient use of OLTC is being actively carried out [22][23][24][25]. Previous studies have focused on the voltage control function of the OLTC.…”

Section: Introductionmentioning

confidence: 99%

An Approach to Improve the Penetration of Sustainable Energy Using Optimal Transformer Tap Control

Bae

Lee

2017

Sustainability

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A method to secure the generator reactive power reserve by adjusting the transformer tap to improve the power system penetration of renewable energy has been proposed in this study. The tap is adjusted based on the voltage and reactive power sensitivity in the power system network. That is, the transformer tap sensitivity is calculated and analyzed to adjust the tap variation to gain sufficient or the least necessary amount of reactive power reserve. This method can be effective for generators without any margins in the reserves. The optimization problem based on the calculated sensitivities and effectiveness are presented. The optimum solution derived from such a problem provides the minimum control amount necessary to maintain the system voltage and dynamic reactive power reserve at their pre-specified levels to improve the power system acceptability of renewable energy. To demonstrate the effectiveness of the method proposed, a simulation has been performed for an IEEE-25 bus system. The results from simulations prove that the voltage has been well maintained while securing a dynamic reactive power reserve through optimal control based on the sensitivity analysis.

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Distributed Generation Hosting Capacity Evaluation for Distribution Systems Considering the Robust Optimal Operation of OLTC and SVC

Cited by 242 publications

References 43 publications

A combined probabilistic modeling of renewable generation and system load types to determine allowable DG penetration level in distribution networks

A combined probabilistic modeling of renewable generation and system load types to determine allowable DG penetration level in distribution networks

Quadratic optimization method for a dual index combination of the penetration level and the dispersion factor of the distributed generation

An Approach to Improve the Penetration of Sustainable Energy Using Optimal Transformer Tap Control

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