scholarly journals TEACHING UNDERGRADUATE POWER SYSTEM COURSES WITH THE USE OF SIEMENS PTI PSS/E-UNIVERSITY SIMULATION SOFTWARE

2013 ◽  
Author(s):  
Chi Tang ◽  
Adam Freeman ◽  
Jerome Spence ◽  
Matthew Bradica ◽  
Donge Ren
Keyword(s):  
Power System ◽  
Power Flow ◽  
Transient Stability ◽  
Reactive Power ◽  
Short Circuit ◽  
Flow Analysis ◽  
Theoretical Background ◽  
Simulation Software ◽  
Engineering Technology ◽  
Basic Power

This paper summarizes the experience in using Siemens PSSE-University power system simulation software as a teaching aid to introduce basic power system concepts to engineering technology students at the undergraduate level. Topics to be discussed and demonstrated in this paper include AC and DC power flow analysis, power system transient stability analysis, reactive power and voltage control, as well as short circuit analysis. For each of the topics presented above, the paper will provide (i) the theoretical background, (ii) a numerical example solvable by hand-calculations, and (iii) the corresponding solution obtained from running PSSE- University. The paper will also provide the perspectives of the instructor on using PSSE as a teaching tool and the perspectives of the students on using PSSE as a learning tool.

scholarly journals Load Flow Analysis in Hybrid AC-DC Transmission Network

2021 ◽  
pp. 617-624
Author(s):  
Ajith M ◽  
Dr. R. Rajeswari
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
System Stability ◽  
And Control

Power-flow studies are of great significance in planning and designing the future expansion of power systems as well as in determining the best operation of existing systems. Technologies such as renewables and power electronics are aiding in power conversion and control, thus making the power system massive, complex, and dynamic. HVDC is being preferred due to limitations in HVAC such as reactive power loss, stability, current carrying capacity, operation and control. The HVDC system is being used for bulk power transmission over long distances with minimum losses using overhead transmission lines or submarine cable crossings. Recent years have witnessed an unprecedented growth in the number of the HVDC projects. Due to the vast size and inaccessibility of transmission systems, real time testing can prove to be difficult. Thus analyzing power system stability through computer modeling and simulation proves to be a viable solution in this case. The motivation of this project is to construct and analyze the load flow and short circuit behavior in an IEEE 14 bus power system with DC link using MATLAB software. This involves determining the parameters for converter transformer, rectifier, inverter and DC cable for modelling the DC link. The line chosen for incorporation of DC link is a weak bus. This project gives the results of load flow and along with comparison of reactive power flow, system losses, voltage in an AC and an AC-DC system.

scholarly journals Power Flow and Transient Stability Enhancement using Thyristor Controlled Series Compensation

2018 ◽  
Vol 37 (4) ◽  
pp. 685-700 ◽  
Author(s):  
Zaira Anwar ◽  
Tahir Nadeem Malik ◽  
Tahir Abbas
Keyword(s):  
Power System ◽  
Transmission Line ◽  
Dynamic Stability ◽  
Power Flow ◽  
Transient Stability ◽  
Dynamic Models ◽  
Efficient Solutions ◽  
Simulation Software ◽  
Series Compensation ◽  
Thyristor Controlled Series Compensation

TL (Transmission Line) congestion is a key factor that affects the power system operational cost. In addition of renewable generation in National Grid of Pakistan, transmission line congestion are frequent. Consequently, the network in this particular region faces severe congestion and dynamic stability problems. It has been planned that renewable plants shaved to curtail some available generation to minimize this inevitable congestion. However, one of the cost-efficient solutions to this problem is series compensation of lines using TCSC (Thyristor Controlled Series Compensation). It significantly increases the transfer capability of existing power transmission and enhances the dynamic stability of system at a lower cost, and has shorter installation time as compared to the construction of new TLs. This paper deals with the dynamic modeling of a TCSC in the NTDC (National Transmission and Dispatch Company) network with its applications to alleviate congestion during fault conditions. This study has been carried out using simulation software PSS/E (Power System Simulator for Engineers) which does not have a predefined dynamic model for TCSC, this leads to the necessity of creating a user defined model. The model of TCSC has been programmed in FORTRAN and compiled along with existing dynamic models of network components. The results indicate that power flow and dynamic stability of network is enhanced

scholarly journals Fast Heuristic AC Power Flow Analysis with Data-Driven Enhanced Linearized Model

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3308
Author(s):  
Xingpeng Li
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Flow ◽  
Flow Model ◽  
Reactive Power ◽  
Unit Commitment ◽  
Flow Analysis ◽  
Data Driven ◽  
Dc Power ◽  
Ac Power

Though the full AC power flow model can accurately represent the physical power system, the use of this model is limited in practice due to the computational complexity associated with its non-linear and non-convexity characteristics. For instance, the AC power flow model is not incorporated in the unit commitment model for practical power systems. Instead, an alternative linearized DC power flow model is widely used in today’s power system operational and planning tools. However, DC power flow model will be useless when reactive power and voltage magnitude are of concern. Therefore, a linearized AC (LAC) power flow model is needed to address this issue. This paper first introduces a traditional LAC model and then proposes an enhanced data-driven linearized AC (DLAC) model using the regression analysis technique. Numerical simulations conducted on the Tennessee Valley Authority (TVA) system demonstrate the performance and effectiveness of the proposed DLAC model.

Research for Transient-Voltage Stability Based on Doubly-Fed Wind Power Generation System

2015 ◽  
Vol 738-739 ◽  
pp. 1251-1255 ◽  
Author(s):  
Liang Liu ◽  
Hai Ming Li ◽  
Si Qing Sheng ◽  
Huan Li
Keyword(s):  
Power System ◽  
Wind Farm ◽  
Transient Stability ◽  
Reactive Power ◽  
Simulation Software ◽  
Support Network ◽  
Power Regulation ◽  
Doubly Fed ◽  
Doubly Fed Generator ◽  
Better Than

Although the doubly-fed generator group has a flexible ability of reactive power regulation, when a fault occurs in the power system, the ability will be closed to saturation and we need to adopt measures to support network voltage. In this paper, the model of doubly-fed wind turbine、SVC and STATCOM will be given. And the paper will provide a control system of the two dynamic reactive power compensation devices respectively. By power system simulation software Matlab and combining a regional power grid of Mengdon, both SVC and STATCOM are applied to the wind farm and the paper will analyze the characteristics of network voltage. The simulative results show that both the SVC and STATCOM can help wind farm voltage rapidly reconstructed after the fault. In addition, the STATCOM can better improve the transient stability of the wind farm and the compensation effect of STATCOM is better than SVC.

scholarly journals Load Flow Analysis and Short Circuit Faults with the Additional Distributed Generation Wind Turbine 300 kW at Andalas University

2021 ◽  
Vol 1 (1) ◽  
pp. 41-47
Author(s):  
Fadhel Putra Winarta ◽  
Yoli Andi Rozzi
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Electric Power ◽  
Power Flow ◽  
Voltage Drop ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
Electric Power System ◽  
A Value

The study of electric power flow analysis (Load Flow) is intended to obtain information about the flow of power or voltage in an electric power system network. This information is needed to evaluate the performance of the power system. Electrical power flow problems include calculating the flow and system voltage at certain terminals or buses. The benefits of this power flow study are to find out the voltage at each node in the system, to find out whether all the equipment meets the specified limits to deliver the desired power, and to obtain the original conditions in the new system planning. This study is divided into two: the analysis of data when the conditions have not been added wind turbine and after the addition of 300 kW wind turbine with software power station ETAP software 12.6.0 and the Newton-Raphson method will be used in analyzing the power flow of the electric power system. Based on the results of the tests, it is found that the overall value of losses for power flow before the addition of DG is 0.031 MW and 0.037 Mvar, for the voltage drop with the lowest percentage, namely on bus 10 with a percentage of 96.45 for the 0.4 kV system and the 20 kV system on bus 19 with a percentage of 99.03, the largest% PF load was in lump 1 with 98.64 and the smallest% PF was in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University before the addition of DG with 3-phase disturbances averaged 13.354 A, 1-phase disturbances averaged 3.521 A, 2-phase disturbances averaged 11.719 A and 2 ground phases of 12.842 A Whereas for the value of power flow after the addition of DG in the form of the wind turbine of 300 kW the overall value of losses is 0.032 MW and 0.042 MvarAR, for the voltage drop with the percentage for voltage drop with the lowest percentage is bus 10 with a percentage of 96.63 for system 0, 4 kV and a 20 kV system on bus 14 with a percentage of 98.1, the largest% PF load is in lump 1 with 98.64 and the smallest% PF is in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University after the addition of DG with 3 phase disturbances has an average value of 13.354 A, 1 phase disturbance averages 3.523 A, 2 phase disturbances average 11.737 A and 2 phases ground is 12.059 A For the source in this system, after the addition of DG, there was a change in the% PF of the PLN grid, namely 79.53 and the wind turbine -83%.

Selecting Optimal Reactive Compensation Device for Power System

2014 ◽  
Vol 556-562 ◽  
pp. 1560-1563
Author(s):  
Tran Thi Ngoat ◽  
Xiao Ming Zha ◽  
Le Ngoc Giang
Keyword(s):  
Power System ◽  
Power Flow ◽  
Transient Stability ◽  
Reactive Power ◽  
Transient State ◽  
Power Generating Unit ◽  
Load Demand ◽  
Reactive Compensation ◽  
Compensation Device ◽  
Selection Of

Although there are many studies on application of FACTS unit, especially application of reactive power generating unit for power system to enhance voltage stability amplitude and transient stability as considered, the evaluation and selection of suitable power generating unit (STATCOM or SVC) as well as optimal compensation size in the analysis of steady and transient state is not paid attention to. This article studies the above described issues to give a solution to install reasonable reactive power generating source (kind of Var source, location, size) for the power system. The analysis will be based on the technical factors rather than economic ones. 500kV grid system in Vietnam will be used in the calculation until 2015. To deeply evaluate, the implementation plan of reactive power compensation was only studied for 500kV grid in the South, where the load demand is large and can be dramatically increased. The results of power flow calculation, the analysis of characteristics of PV, OPF, and transient stability were studied through PSS/E-30 software.

scholarly journals Low Voltage Ride Through Controller for a Multi-Machine Power System Using a Unified Interphase Power Controller

Electronics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 585
Author(s):  
Atoosa Majlesi ◽  
Mohammad Reza Miveh ◽  
Ali Asghar Ghadimi ◽  
Akhtar Kalam
Keyword(s):  
Power System ◽  
Power Flow ◽  
Transient Stability ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Drop ◽  
Energy Resource ◽  
Unified Power Flow Controller ◽  
Power Controller ◽  
Low Voltage Ride Through

In recent years, grid-connected photovoltaic (PV) power generations have become the most extensively used energy resource among other types of renewable energies. Increasing integration of PV sources into the power network and their dynamic performances under fault conditions is an important issue for grid code requirements. In this paper, a PV source as a unified interphase power controller (UIPC) is used to enhance the low voltage ride through (LVRT) and transient stability of a multi-machine power system. The suggested PV-based UIPC consists of two series voltage inverters and a parallel inverter. The UIPC injects the required active and reactive power to prevent voltage drop under grid fault conditions. Accordingly, a dynamic control system is designed based on proportional-integral (PI) controllers for the PV-based UIPC to operate in both normal and fault conditions. Simulations are done using Matlab/Simulink software, and the performance of the PV-based UIPC is compared with the conventional unified power flow controller (UPFC). The results of this study indicate the more favorable impact of the PV-based UIPC on the system compared to UPFC in improving LVRT capabilities and transient stability.

scholarly journals SIMULASI ALIRAN DAYA PADA SISTEM TENAGA LISTRIK DI GARDU INDUK GANDUL PT. PLN (PERSERO) MENGGUNAKAN SOFTWARE MATLAB POWER SYSTEM ANALYSIS TOOLBOX (PSAT) 2.1.7 DENGAN METODE NEWTON RAPHSON

2020 ◽  
Vol 5 (1) ◽  
pp. 14-20
Author(s):  
Endiansyah Pradana ◽  
Rif’an Muhammad ◽  
Imam Arif Raharjo
Keyword(s):  
Power System ◽  
Power Flow ◽  
System Analysis ◽  
Reactive Power ◽  
Flow Simulation ◽  
Numerical Data ◽  
Small Error ◽  
Active Power ◽  
Simulation Software ◽  
Power System Analysis

ABSTRACT This study aims to determine the results of the simulation of the power flow transformer 4 10 buses in the Gandul Substation of PT. PLN (Persero) with MATLAB Power System Analysis Toolbox (PSAT) 2.1.7. To find out the results of a comparison of the simulation of the flow of power 4 transformer 10 buses in the Gandul substation PT. PLN (Persero) MATLAB PSAT 2.1.7 software with ETAP software 12.6.Data analysis technique used in this study is quantitative descriptive analysis method. Descriptive will only describe the state of a symptom that has been recorded and then processed according to its function. Descriptive statistics are statistics that have the task of organizing and analyzing numerical data, in order to provide a regular, concise and clear picture of a phenomenon, event or situation, so that certain understandings or meanings can be drawn.The results of research on power flow at the Gandul substation PT. PLN (Persero) uses MATLAB Power System Analysis Toolbox (PSAT) 2.1.7 simulation of power flow with MATLAB PSAT 2.1.7 software completed at Power Flow Completed 0.066 s with a number of 2 iterations, iteration 1 shows Maximum Convergency Error 0.0011257 and iteration 2 shows Maximum Convergency Error 1.2621e-06. While the result of the simulation software ETAP 12.6 the number of oterations completed in iteration 3.The results of power flow simulation software MATLAB PSAT 2.1.7 and ETAP 12.6 on Active Power (MW) have a fairly big error, which is 11.5%. The largest error value generated is 11.5%, namely the feeder Sheen and Niece. Then, the results of power flow simulation software MATLAB PSAT 2.1.7 and ETAP 12.6 on Reactive Power (MVar) have a fairly big error, which is 24.4%. The largest error value generated is 24.4%, which is found in Canggah feeders. And the results of power flow simulation software MATLAB PSAT 2.1.7 and ETAP 12.6 against voltage (kV) have a fairly small error. Almost every feeder has the same error from the Rainbow feeder to the niece.The conclusion in this study is the results of power flow simulation with MATLAB Power System Analysis Toolbox 2.1.7 show the value of Active Power of 15.1362 MW and Reactive Power of 10.0349 MVar. Meanwhile, the results of power flow simulation with ETAP 12.6 software show the value of Active Power of 15.3720 MW and Reactive Power of 10.3510 MVar.   ABSTRAK Penelitian ini bertujuan Untuk mengetahui hasil dari simulasi aliran daya Trafo 4 10 bus di Gardu Induk Gandul PT. PLN (Persero) dengan software MATLAB Power System Analysis Toolbox (PSAT) 2.1.7. Untuk mengetahui hasil perbandingan simulasi aliran daya Trafo 4 10 bus di Gardu Induk Gandul PT. PLN (Persero) software MATLAB PSAT 2.1.7 dengan software ETAP 12.6. Teknik analisis data yang digunakan pada penelitian ini adalah metode analisis desktriptif kuantitatif. Deskriptif hanya akan mendeskripsikan keadaan suatu gejala yang telah direkam kemudian diolah sesuai dengan fungsinya. Statistik deskriptif adalah statistik yang mempunyai tugas mengorganisasi dan menganalisa data angka, agar dapat memberikan gambaran secara teratur, ringkas dan jelas, mengenai suatu gejala, peristiwa atau keadaan, sehingga dapat ditarik pengertian atau makna tertentu. Hasil penelitian aliran daya di gardu induk Gandul PT. PLN (Persero) menggunakan software MATLAB Power System Analysis Toolbox (PSAT) 2.1.7 simulasi aliran daya dengan software MATLAB PSAT 2.1.7 selesai pada Power Flow Completed 0.066 s dengan jumlah 2 iterasi, iterasi 1 menunjukkan Maximum Convergency Error 0.0011257 dan iterasi 2 menunjukkan Maximum Convergency Error 1.2621e-06. Sedangkan hasil simulasi software ETAP 12.6 jumlah iterasi selesai pada iterasi 3. Hasil simulasi aliran daya software MATLAB PSAT 2.1.7 dan ETAP 12.6 pada Daya Aktif (MW) mempunyai error yang cukup besar, yaitu 11.5%. Nilai error terbesar yang dihasilkan sebesar 11.5% yaitu pada penyulang Kemilau dan Keponakan. Lalu, hasil simulasi aliran daya software MATLAB PSAT 2.1.7 dan ETAP 12.6 pada Daya Reaktif (MVar) mempunyai error yang cukup besar, yaitu 24.4%. Nilai error terbesar yang dihasilkan sebesar 24.4%, yaitu terdapat pada penyulang Keponakan. Dan hasil simulasi aliran daya software MATLAB PSAT 2.1.7 dan ETAP 12.6 terhadap tegangan (kV) mempunyai error yang cukup kecil. Hampir setiap penyulang mempunyai error yang sama dari penyulang Pelangi hingga Keponakan. Kesimpulan dalam penelitian ini yaitu Hasil simulasi aliran daya dengan software MATLAB Power System Analysis Toolbox 2.1.7 menunjukkan nilai Daya Aktif sebesar 15.1362 MW dan Daya Reaktif sebesar 10.0349 MVar. Sedangkan, hasil simulasi aliran daya dengan software ETAP 12.6 menunjukkan nilai Daya Aktif sebesar 15.3720 MW dan Daya Reaktif sebesar 10.3510 MVar.

scholarly journals Transient stability enhancement of statcom integration in power grid

2019 ◽  
Vol 16 (2) ◽  
pp. 553
Author(s):  
I. A Ethmane ◽  
A.K. Mahmoud ◽  
M. Maaroufi ◽  
A. Yahfdhou
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Distribution Systems ◽  
Transient Stability ◽  
Reactive Power ◽  
Voltage Drop ◽  
Flow Analysis ◽  
Drop Out ◽  
Power Flow Analysis ◽  
Facts Devices

T<span>o solve load growth of a hybrid existing electrical system, we at first build generation stations (wind, solar or thermical). And secondly in 2025 year, when the system is so meshed, some buses will be very far from production energy, the transits power will be lower than the transmission capacity, and the voltage drop out margin limit of stability. Therefore it is proposed to install Flexible AC Transmission System (FACTS) devices to enhance the transient power stability and quality in the power system. The power flow analysis of Newton Raphson method is performed on a seven (7) bus system with and without static synchronous compensator (STATCOM). The STATCOM is a shunt connected FACTS devices that are useful for reactive power compensation and mitigation of power quality problems in transmission and distribution systems. These investigations indicate the need of power flow analysis and determine best locations of STATCOM on the proposed system. The results of simulation have been programmed in MATLAB and PSS/E Simulator. In the end the expected disturbances and the power quality enhancement of the network in the horizon 2025 were attenuated by integration of STATCOM that is able to supply or absorb reactive power and to maintain the voltage at 1pu.</span>

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