scholarly journals Quantifying TRM by Modified DCQ Load Flow Method

2021 ◽  
Vol 23 (2) ◽  
pp. 157-163
Author(s):  
Awatif Nadia ◽  
Md. Sanwar Hossain ◽  
Md. Mehedi Hasan ◽  
Khondoker Ziaul Islam ◽  
Shahajan Miah
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Load Flow ◽  
Transmission Network ◽  
Distribution Factor ◽  
Electric System ◽  
Flow Method ◽  
Transmission Reliability ◽  
System Operator ◽  
Integrated Power System

In the integrated power system network uncertainty can occur at any time. The transmission reliability (TRM) margin is the amount of transmission capacity that guarantees that the transmission network is protected from instability in the operating state of the system. The calculation of the available transfer capacity (ATC) of the transmission reliability margin should be included in a deregulated power system to ensure that the transmission network is safe within a fair range of uncertainties that arise during the power transfer. However, the TRM is conserved as a reliability margin to reflect the unpredictability of the operation of the electric system. Besides, the system operator (SO) utilizes the TRM value during unreliability by adjusting the ATC value some amount up or down to account for errors in data and uncertainty in the model. This paper describes a technique for TRM estimation by modified DCQ load flow method considering VAR transfer distribution factor. The main focus of this study is to get a new approach to determine TRM by incorporating with ATCQ considered reactive power and sensitivity w.r.t ATC considered voltage magnitude. This technique is applied to the IEEE 6 bus system, and results are compared with previous results for validation. The technique leads to more exact and secure estimates of transmission reliability margin.

Analyses and Monitoring of Power Grid

2011 ◽  
pp. 315-343
Author(s):  
Rana A. Jabbar ◽  
Muhammad Junaid ◽  
M. A. Masood ◽  
A. Bashir ◽  
M. Mansoor
Keyword(s):  
Power System ◽  
Electric Power ◽  
Reactive Power ◽  
Short Circuit ◽  
Load Flow ◽  
Power Company ◽  
Power Loading ◽  
Electric Power Company ◽  
Ground Grid ◽  
Integrated Power System

Power system analyses and monitoring of power system engineering are as essential as oxygen for human beings. This innovative approach deals with a 132 kV grid simulation in electrical transient analyzer program (ETAP). The existing power distribution system in Pakistan consists of approximately six thousand 11 kV feeders, which are mainly analyzed by software FDR-ANA (Feeder Analyses). This software does not have capability to provide comprehensive analyses for integrated power system. The case under study is 132 kV grid situated in Gujranwala electric power company (GEPCO), one of the distribution companies (DISCO’s) of Pakistan electric power company (PEPCO) which has been selected for comprehensive analyses using ETAP software. This software performs numerical calculations of large integrated power system with fabulous speed, besides generating output reports. In a developing country like Pakistan it is first time that analyses based Off-line monitoring has been made, which includes load flow, harmonic, transient, short circuit and ground grid analyses. In load flow analysis, current flowing in every branch, power factor, active and reactive power flow, line losses, voltage magnitude with angle etc. have been calculated. During harmonic analysis, distorted current and voltage waveforms along with their harmonic spectrum caused by non-linear loads have been recorded. Transient analysis has been performed to record different waveforms like variation in bus frequency, bus real power loading, bus voltage angle, and bus reactive power loading for short interval of time during transient conditions. In ground grid modeling, step, and touch potentials have been calculated in comparison with set standards. While performing short circuit analysis, all the possible short circuit faults like line to ground, double line to ground, 3-phase faults etc. on ½ cycle, 1.5 to 4 cycle, and 30 cycle networks have been performed to record the short circuit currents. These analyses have been executed using ETAP software, based upon historical data obtained from original system that will be very helpful for system security and reliability.

scholarly journals Analysis of Load Flow Method With Static Var Compensator (SVC) for Minimizing Transmission Losses in Power System : A Case Study of 500 KV Java-Bali Electrical Power System

2019 ◽  
Vol 1 (1) ◽  
pp. 9
Author(s):  
Chico Hermanu Brillianto Apribowo ◽  
Oktavian Listiyanto
Keyword(s):  
Power Generation ◽  
Power System ◽  
Reactive Power ◽  
Load Flow ◽  
Active Power ◽  
Static Var Compensator ◽  
Electrical Power System ◽  
Flow Method ◽  
Power Load ◽  
The Stability

<p class="Abstract">Demand for electricity is increasing rapidly, the consequence of this is a threat to the stability of the electrical system, one of which is the voltage stability. FACTS or Flexible Alternating Current Transmission System is electronic equipment that is able to regulate electric power transmission that can be used to overcome stability problems. This research will analyze the use of Static Var Compensator (SVC) as one of the equipment from FACTS to overcome the stability of the most critical buses by using the 500 kV Java-Bali electricity system using PSAT. Results from using the power flow method in the 500 kV Java-Bali case show that the total active power generation is 12.144 p.u. and the total reactive power generation is 5.268 p.u. This value is obtained from the total addition of active power generation and reactive power of all plants in the 500 kV Java-Bali system. While the total active power load is worth 12.058 p.u. and the total reactive power load is 4.65 p.u. This value is obtained from the total load on each bus plus the total losses incurred on the line.</p>

Research on Fast Decoupled Load Flow Method of Power System

2015 ◽  
Vol 740 ◽  
pp. 438-441 ◽  
Author(s):  
Wei Zheng ◽  
Fang Yang ◽  
Zheng Dao Liu
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Power Flow ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Load Flow ◽  
Reactive Power Optimization ◽  
Flow Calculation ◽  
Steady State Operation ◽  
Numerical Simulation Methods

The power flow calculation is study the steady-state operation of the power system as basic electrical calculations. It is given the power system network topology, device parameters and determines system health boundary conditions, draw a detailed operating status of the power system through numerical simulation methods, such as voltage amplitude and phase angle on the bus system the power distribution and the power loss. Flow calculation is the power system operation, planning and safety, reliability analysis, is fundamental to the system voltage regulation, network reconfiguration and reactive power optimization must call the function, so the trend has very important significance to calculate the power system.

Power system contingency ranking using fast decoupled load flow method

2016 ◽  
Author(s):  
Sandhya Rani Gongada ◽  
Tegala. Srinivasa Rao ◽  
P. Mallikarjuna Rao ◽  
Shaik Salima
Keyword(s):  
Power System ◽  
Load Flow ◽  
Flow Method ◽  
Contingency Ranking

Performance Analysis on Transmission Line for Improvement of Load Flow

2012 ◽  
Vol 433-440 ◽  
pp. 7208-7212
Author(s):  
Ya Min Su Hlaing ◽  
Ze Ya Aung
Keyword(s):  
Steady State ◽  
Power System ◽  
Transmission Line ◽  
Power Flow ◽  
Reactive Power ◽  
Load Flow ◽  
Electric Power System ◽  
Steady State Condition ◽  
Newton Raphson ◽  
Raphson Method

This thesis implements power flow application, Newton-Raphson method. The Newton-Raphson method is mainly employed in the solution of power flow problems. The network of Myanma electric power system is used as the reference case. The system network contains 90 buses and 106 brunches. The weak points are found in the network by using Newton-Raphson method. Bus 16, 17, 85 and 86 have the most weak bus voltages. The medium transmission line between bus 87 and bus 17 is compensated by using MATLAB program software. The transmission line is compensated with shunt reactors, series and shunt capacitors to improve transient and steady-state stability, more economical loading, and minimum voltage dip on load buses and to supply the requisite reactive power to maintain the receiving end voltage at a satisfactory level. The system performance is tested under steady-state condition. This paper investigates and improves the steady–state operation of Myanma Power System Network.

scholarly journals Comparison of Solvers Performance for Load Flow Analysis

2019 ◽  
Vol 3 (1) ◽  
pp. 26 ◽  
Author(s):  
Vishnu Sidaarth Suresh
Keyword(s):  
Steady State ◽  
Power System ◽  
Reactive Power ◽  
Flow Analysis ◽  
Steady State Solution ◽  
Load Flow ◽  
State Solution ◽  
Computational Time ◽  
Load Flow Analysis ◽  
Active And Reactive Power

Load flow studies are carried out in order to find a steady state solution of a power system network. It is done to continuously monitor the system and decide upon future expansion of the system. The parameters of the system monitored are voltage magnitude, voltage angle, active and reactive power. This paper presents techniques used in order to obtain such parameters for a standard IEEE – 30 bus and IEEE-57 bus network and makes a comparison into the differences with regard to computational time and effectiveness of each solver

scholarly journals Mapping and Analysis of the Reactive Power Balance in the Danish Transmission Network

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 419
Author(s):  
Mads Nannestad ◽  
Zhe Zhang ◽  
Jundi Jia ◽  
Emil Jensen ◽  
Peter Randewijk
Keyword(s):  
Distribution System ◽  
Reactive Power ◽  
Transmission System ◽  
Scale Model ◽  
Power Balance ◽  
Transmission Network ◽  
Power Devices ◽  
Comprehensive Overview ◽  
Overhead Lines ◽  
System Operator

This paper investigates the reactive power balance of the Zealand side of the Danish transmission system (DK2) by using QV-curves. The study is performed in cooperation with Energinet, who is the Danish transmission system operator (TSO). Firstly, this paper aims to map the reactive power balance with the current challenges in the system, which appears due to a decision of changing overhead lines in the scenic area to cables. Secondly, a method is derived for obtaining a comprehensive overview of the impacts that future projects might have on the system. By dividing the transmission system into smaller areas, it is possible to analyze how the reactive power will affect the voltage; moreover, it is favorable to analyze and handle the challenges in the reactive power balance locally. This helps the TSO to quickly determine the lack of reactive power devices and issues that might occur in future expansions of the system. For this paper, a full-scale model of DK2 and SCADA-data has been utilized. It covers the period from 01-01-2016 to 20-08-2017 between the TSO and the Distribution System Operator (DSO). The studies have shown how the location of the wind production will create issues in the reactive power balance.

Analysis of load flow and continuous power flow method in power system : A case study of 500 kV Java-Bali electrical power system

2020 ◽  
Author(s):  
Chico Hermanu Brillianto Apribowo ◽  
Oktavian Listiyanto ◽  
Muhammad Hamka Ibrahim
Keyword(s):  
Power System ◽  
Power Flow ◽  
Electrical Power ◽  
Load Flow ◽  
Electrical Power System ◽  
Flow Method ◽  
System A ◽  
Continuous Power ◽  
Power Flow Method

Voltage Instability Analysis for Electrical Power System Using Voltage Stabilty Margin and Modal Analysis

2016 ◽  
Vol 3 (3) ◽  
pp. 655 ◽  
Author(s):  
Ahmad Fateh Mohamad Nor ◽  
Marizan Sulaiman ◽  
Aida Fazliana Abdul Kadir ◽  
Rosli Omar
Keyword(s):  
Power System ◽  
Modal Analysis ◽  
Electric Power ◽  
Reactive Power ◽  
Research Work ◽  
Load Flow ◽  
Electric Power System ◽  
Instability Analysis ◽  
Real Power ◽  
Voltage Instability

Voltage instability analysis in electric power system is one of the most important factors in order to maintain the equilibrium of the power system. A power system is said to be unstable if the system is not able to maintain the voltage at all buses in the system remain unchanged after the system is being subjected to a disturbance.The research work presented in this paper is about the analysis of voltage instability of electric power system by using voltage stability margin (VSM), load real power (P) margin, reactive power (Q) margin, reactive power-voltage (QV) and real power-voltage (PV) modal analysis. IEEE 30-bus system has been chosen as the power system. The load flow analysis are simulated by using Power World Simulator software version 16. Both QV and PV modal analysis were done by using MATLAB application software.

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