ORIGINAL_ARTICLE
OPTIMAL SIZING AND SITING OF DG RESOURCES AT 63KV/20KV SUBSTATIONS CONSIDERING THE EFFECT OF EARTHQUAKE ON TECHNICAL AND ECONOMIC PARAMETERS
The Iranian Ministry of Energy commands the Regional Electrical Companies to install DG resources at 63kV/20kV substations and at the end of 20kV lines. The first and foremost challenge in installing these resources is deciding on the optimal place and capacity of these resources. This paper is aimed to propose an appropriate algorithm for siting and sizing such resources in Bakhtar Regional Electrical Company. The proposed algorithm takes into consideration all technical and economic factors important to the company. Due to the variety of important factors in sizing and siting, this paper proposes a new method to reduce limitations and constraints of this process. Accordingly, all technical and economic factors are assigned monetarily, so violating limitations reduces considered benefits. This method increases the probability of convergence of results and accordingly is appropriate for application in actual network where there are numerous factors. Another feature of this paper is considering the parameter of earthquake for the first time and is assigned monetarily according to its devastating effects on considered parameters. Applying this parameter while sizing and siting leads to increase in distributed generation impacts in reducing customer outage in locations with high probability of earthquake. The obtained results are reported and discussed.
https://ijste.shirazu.ac.ir/article_3487_788c27d8542d3dc95bb2bd9c90b17b46.pdf
2015-12-01
133
153
10.22099/ijste.2015.3487
Distributed generation
siting
sizing
cost-to-benefit ratio
earthquake
S.A.
HOSSEINI
1
Dept. of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, I. R. of Iran
AUTHOR
H.
ASKARIAN ABYANEH
askarian@aut.ac.ir
2
Dept. of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, I. R. of Iran
LEAD_AUTHOR
S.H.H.
SADEGHI
3
Dept. of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, I. R. of Iran
AUTHOR
F.
RAZAVI
4
Dept. of Electrical Engineering, Qazvin Islamic Azad University, Qazvin, I. R. of Iran
AUTHOR
M.
KARAMI
5
Tehran Power Transmission Maintenance Engineering Company (METANIR), I. R. of Iran
AUTHOR
ORIGINAL_ARTICLE
THREE PHASE ON-LINE UPS BY IMPLEMENTING T-SOURCE INVERTER WITH MAXIMUM CONSTANT BOOST PWM CONTROL
This paper presents the new topology of three phase on line Uninterruptible Power Supply (UPS) by employing T-Source Inverter (TSI) with maximum constant boost Pulse Width Modulation (PWM) control and the results are compared with the conventional Uninterruptible Power Supply (UPS). The conventional UPS consists of Voltage Source Inverter (VSI) with step up transformer or DC-DC booster which decreases the efficiency and increases energy conversion cost. The proposed three phase UPS with TSI has the voltage boost capability through shoot through zero state which is not present in the conventional VSI. This proposed UPS increases the efficiency due to single stage conversion, reduces the harmonics, increases the voltage gain and reduces the voltage stress. The performance of the three phase on-line UPS with TSI is simulated in MATLAB / SIMULINK software and the results are compared with conventional UPS. The simulation and the theoretical analysis are validated with experimental results.
https://ijste.shirazu.ac.ir/article_3492_346dd6965e387884c8cc4f08ef5f828d.pdf
2015-12-01
209
215
10.22099/ijste.2015.3492
On-line UPS
T-Source Inverter
maximum constant boost
boost factor
K.
CHITRA
chitrak@bitsathy.ac.in
1
Dept.of EEE, Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu, India
LEAD_AUTHOR
A.
JEEVANANDHAM
2
Dept.of EEE, Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu, India
AUTHOR
ORIGINAL_ARTICLE
ORDER REDUCTION OF LINEAR SYSTEMS WITH KEEPING THE MINIMUM PHASE CHARACTRISTIC OF THE SYSTEM: LMI BASED APPROACH
Model order reduction is known as the problem of minimizing the -norm of the difference between the transfer function of the original system and the reduced one. In many papers, linear matrix inequality (LMI) approach is utilized to address the minimization problem. This paper deals with defining an extra matrix inequality constraint to guarantee that the minimum phase characteristic of the system preserves after order reduction. To overcome this, poles and zeros of the reduced system transfer function must be at left-half plane (LHP). It is very easy to apply a LMI condition to force the poles of the system to be at LHP. However, the same cannot be applied to zeroes easily. Thus, a special state-space realization of the system is introduced in a way to apply conditions on zeros of the reduced system. The method is applied to some sample examples and the simulation results verify the performance of the proposed method.
https://ijste.shirazu.ac.ir/article_3493_18224e441757a01dbd62665e3c87c051.pdf
2015-12-01
217
227
10.22099/ijste.2015.3493
H∞-norm
Linear matrix inequalities
minimum phase system
model order reduction
G.
KHADEMI
1
School of Electrical and Computer Engineering, Shiraz University, Shiraz, I. R. of Iran
AUTHOR
H.
MOHAMMADI
2
School of Electrical and Computer Engineering, Shiraz University, Shiraz, I. R. of Iran
AUTHOR
M.
DEHGHANI
mdehghani@shirazu.ac.ir
3
School of Electrical and Computer Engineering, Shiraz University, Shiraz, I. R. of Iran
LEAD_AUTHOR