Next Article in Journal
Voltage Harmonic Impacts on Electric Motors: A Comparison between IE2, IE3 and IE4 Induction Motor Classes
Next Article in Special Issue
Review of Steady-State Electric Power Distribution System Datasets
Previous Article in Journal
Crystallization of Amorphous Silicon via Excimer Laser Annealing and Evaluation of Its Passivation Properties
Previous Article in Special Issue
Heuristic Coordinated Voltage Control Schemes in Distribution Network with Distributed Generations
Article

Voltage and Reactive Power Optimization Using a Simplified Linear Equations at Distribution Networks with DG

Department of Electrical Engineering, Chonnam National University, Gwangju 61186, Korea
*
Author to whom correspondence should be addressed.
Energies 2020, 13(13), 3334; https://doi.org/10.3390/en13133334
Received: 29 May 2020 / Revised: 23 June 2020 / Accepted: 29 June 2020 / Published: 30 June 2020
(This article belongs to the Special Issue Electric Distribution System Modeling and Analysis)
In this paper, the VVO (Volt/Var optimization) is proposed using simplified linear equations. For fast computation, the characteristics of voltage control devices in a distribution system are expressed as a simplified linear equation. The voltage control devices are classified according to the characteristics of voltage control and represented as the simplified linear equation. The estimated voltage of distribution networks is represented by the sum of the simplified linear equations for the voltage control devices using the superposition principle. The voltage variation by the reactive power of distributed generations (DGs) can be expressed as the matrix of reactance. The voltage variation of tap changing devices can be linearized into the control area factor. The voltage variation by capacitor banks can also be expressed as the matrix of reactance. The voltage equations expressed as simplified linear equations are formulated by quadratic programming (QP). The variables of voltage control devices are defined, and the objective function is formulated as the QP form. The constraints are set using operating voltage range of distribution networks and the control ranges of each voltage control device. In order to derive the optimal solution, mixed-integer quadratic programming (MIQP), which is a type of mixed-integer nonlinear programming (MINLP), is used. The optimal results and proposed method results are compared by using MATLAB simulation and are confirmed to be close to the optimal solution. View Full-Text
Keywords: Volt/Var optimization; distributed generation; OLTC (On Load Tap Changer); mixed-integer nonlinear programming; quadratic programming Volt/Var optimization; distributed generation; OLTC (On Load Tap Changer); mixed-integer nonlinear programming; quadratic programming
Show Figures

Figure 1

MDPI and ACS Style

Go, S.-I.; Yun, S.-Y.; Ahn, S.-J.; Choi, J.-H. Voltage and Reactive Power Optimization Using a Simplified Linear Equations at Distribution Networks with DG. Energies 2020, 13, 3334. https://doi.org/10.3390/en13133334

AMA Style

Go S-I, Yun S-Y, Ahn S-J, Choi J-H. Voltage and Reactive Power Optimization Using a Simplified Linear Equations at Distribution Networks with DG. Energies. 2020; 13(13):3334. https://doi.org/10.3390/en13133334

Chicago/Turabian Style

Go, Seok-Il, Sang-Yun Yun, Seon-Ju Ahn, and Joon-Ho Choi. 2020. "Voltage and Reactive Power Optimization Using a Simplified Linear Equations at Distribution Networks with DG" Energies 13, no. 13: 3334. https://doi.org/10.3390/en13133334

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop