Effect of Advanced Static VAR Compensator on Control of Power System Load Shedding

2011 ◽  
Vol 403-408 ◽  
pp. 4867-4872
Author(s):  
B. Venkateswara Rao ◽  
G. V. Nagesh Kumar ◽  
R. V. S. Lakshmi Kumari ◽  
M. Vinay Kumar
Keyword(s):  
Power System ◽  
Power Flow ◽  
Test System ◽  
Load Shedding ◽  
System Stability ◽  
Static Var Compensator ◽  
System Load ◽  
Flow Solution ◽  
Newton Raphson ◽  
Raphson Method

This paper investigates the effect of Static VAR Compensator (SVC) on power system load shedding. SVC is mainly used in power system stability improvement. This paper proposes a new use of SVC to reduce load shedding. An algorithm of Newton Raphson method (NR) to reduce the load shedding for installing SVC in the system is proposed in this paper. 5 bus test system example is used to demonstrate the effect on load shedding. The test results show that the effect of SVC is significant, in this Static VAR compensator (SVC) is incorporated in Newton Raphson method in which Power Flow Solution is a solution of the network under steady state conditions subjected to certain constraints under which the system operates. The power flow solution gives the nodal voltages and phase angles given a set of power injections at buses and specified voltages at a few, the model of SVC i.e. SVC Susceptance model is discussed. It is also shown that the power system losses are decreased after incorporating the SVC in this N-R method. The results are generated for 5-Bus system. By incorporating the SVC the amount of load shedding is reduced to get the voltages in their limits.

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.

The Modeling of SVC for the Voltage Control in Power System

2017 ◽  
Vol 6 (3) ◽  
pp. 513 ◽  
Author(s):  
Nor Adni Binti Mat Le ◽  
W Mohd Nazmi bin W Musa ◽  
Nurlida Binti Ismail ◽  
Nurul Huda binti Ishak ◽  
Nur Ashida binti Salim
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Voltage Control ◽  
Load Flow ◽  
Static Var Compensator ◽  
Voltage Instability ◽  
Newton Raphson ◽  
Simulation Results ◽  
Power Limit ◽  
Raphson Method

One of the major causes of voltage instability in power system is the reactive power limit. Therefore, this paper aims to analyze the effect of Static Var Compensator (SVC) on voltage stability of a power system. There are many ways to control the voltage, but in this paper only focus on the SVC and IEEE-9 buses. The SVC circuit and IEEE-9 buses were designed and modelled in Power World. The Newton Raphson method was applied to compute the load flow solution. Then, the reactive power (Q) was injected to SVC and the effect of SVC on IEEE 9-buses were studied. The analysis of voltage control was considered the conditions of fault occurred at the bus. The simulation results obtained in Power World demonstrate that the improvement voltage in the IEEE 9-buses when the Q was injected into SVC circuit. Besides, the QV curve was plotted to show the sensitivity and variation bus voltages with respect to the Q injection.

Investigation of Modified Generalized Interline Power Flow Controller (GIPFC) and Performance Analysis

2014 ◽  
Vol 622 ◽  
pp. 111-120
Author(s):  
Ananthavel Saraswathi ◽  
S. Sutha
Keyword(s):  
Power System ◽  
Power Flow ◽  
Test System ◽  
Transmission System ◽  
System Stability ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

Nowadays in the restructured scenario, the main challenging objective of the modern power system is to avoid blackouts and provide uninterrupted quality power supply with dynamic response during emergency to improve power system security and stability. In this sense the convertible static compensator (CSC) that is the Generalized Inter line power flow controller (GIPFC), can control and optimize power flow in multi-line transmission system instead of controlling single line like its forerunner FACTS (Flexible AC Transmission System) controller. By adding a STATCOM (Static synchronous Shunt Converter) at the front end of the test power system and connecting to the common DC link of the IPFC, it is possible to bring the power factor to higher level and harmonics to the lower level and this arrangement is popularly known as Generalized Inter line power flow controller (GIPFC). In this paper a new concept of GIPFC based on incorporating a voltage source converter with zero sequence injection SPWM technique is presented for reinforcement of system stability margin. A detailed circuit model of modified GIPFC is developed and its performance is validated for a standard test system. Simulation is done using MATLAB Simulink.Index Terms—Convertible static controller, Flexible AC Transmission System (FACTS), Generalized Interline Power Flow Controller (GIPFC),STATCOM, SSSC, Reactive power compensation.

The Convergence Analysis of Parsing Algorithm in Power Flow

2012 ◽  
Vol 588-589 ◽  
pp. 547-551
Author(s):  
Jun Jia ◽  
Xuan Li ◽  
Ping Ping Han
Keyword(s):  
Power System ◽  
Power Flow ◽  
Flow Analysis ◽  
Power System Stability ◽  
Point Of View ◽  
System Stability ◽  
Flow Solution ◽  
Important Means ◽  
System Stability Analysis ◽  
Parsing Algorithm

Power flow solution is one of the most important means of power system stability analysis. While parsing algorithm is the basis of power flow analysis. The idea of iteration is frequently used in power flow solution because of the characteristics of power system itself. Textbooks, however, use the gradual iterative thought without rigorous demonstration of the conditions for convergence. From the point of view of mathematical analysis, the article not only gives a proper way to determine the convergence or divergence of the power flow but also provide the exact solution of a simple power flow with an example to demonstrate the validity of the algorithm.

Improvement of Power System Security under Network Contingency with Static VAR Compensator

2011 ◽  
Vol 403-408 ◽  
pp. 2073-2078
Author(s):  
B. Venkateswara Rao ◽  
G.V. Nagesh Kumar ◽  
R.V.S. Lakshmi Kumari ◽  
M. Vinay Kumar
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Normal Operation ◽  
Static Var Compensator ◽  
Power System Security ◽  
Power Losses ◽  
Complex Power ◽  
Newton Raphson ◽  
System Power ◽  
Raphson Method

SVC is incorporated in Newton Raphson method in which Power Flow Solution is a solution of the network under normal operation as well as network contingency, the model of SVC i.e. SVC Susceptance Model is discussed. Newton Raphson Power flow method has been developed for the steady behavior of large complex power systems, it allows the study of power flow under abnormal conditions as well as normal conditions. It is shown that how the system power losses are decreased after incorporating the SVC in this model. It is also shown that how the SVC is useful in network contingency. The results are generated for 5-Bus system.

scholarly journals A Comparative Study of the UPFC System by Simulation with PI-D and (NEWELM and NIMC) Controllers Based on the Adaptive Control for the Compensation of Power

2020 ◽  
Vol 11 ◽  
pp. 22-32
Author(s):  
Bouanane Abdelkrim ◽  
Yahiaoui Merzoug ◽  
Benyahia Khaled ◽  
Chaker Abdelkader
Keyword(s):  
Adaptive Control ◽  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Fast Response ◽  
Test System ◽  
System Stability ◽  
Unified Power Flow Controller ◽  
Model Control ◽  
Elman Recurrent Neural Network

-Flexible Alternating Current Transmission System devices (FACTS) are power electronic components. Their fast response offers potential benefits for power system stability enhancement and allows utilities to operate their transmission systems even closer to their physical limitations, more efficiently, with improved reliability, greater stability and security than traditional mechanical switching technology. The unified Power Flow Controller (UPFC) is the most comprehensive multivariable device among the FACTS controllers. According to high importance of power flow control in transmission lines, new controllers are designed based on the Elman Recurrent Neural Network (NEWELM) and Neural Inverse Model Control (NIMC) with adaptive control. The Main purpose of this paper is to design a controller which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the proposed controllers (NEWELM and NIMC) are based neural adaptive control and simulated on a two bus test system and compared with a conventional PI controller with decoupling (PI-D). The studies are performed based on well known software package MATLAB/Simulink tool box.

scholarly journals Dynamic Power Oscillation Reduction using PSOA-PI in UPFC

2019 ◽  
Vol 9 (2) ◽  
pp. 3046-3050
Keyword(s):  
Power System ◽  
Power Flow ◽  
Reactive Power ◽  
Test System ◽  
Pi Controller ◽  
Settling Time ◽  
System Stability ◽  
Unified Power Flow Controller ◽  
Facts Devices ◽  
Power Oscillations

The power flow control is one the important part of power system to maintain power system stability. If the real power and reactive power can be controlled then the automatic control of the power system gives numerous possibilities. The Flexible AC Transmission System (FACTs) are the devices meant for this operation. There are series and shunt type of FACTs devices available. The Unified Power Flow Controller (UPFC) is one of the best devices in FACTs devices in AC power system. The power flows can be controlled in series and shunt connections using the two converters. The power oscillations are common in UPFC when the reference powers are changed. The PI controllers are replaced with PSOA tuned PI controller to reduces the power oscillations and reduces the settling time. The problem is formulated to minimize the settling time of the power value. The series and shunt controllers are tuned with particle swarm optimization algorithm (PSOA) to tune the PI controller parameters available in it. The MATLAB Simulink version 2017b is used here for the analysis and well known UPFC test system with three generators are used here for testing the proposed method. The results show PSOA tuned PI controller provides better oscillation damping with reduced settling time.

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