Reactive Power Generation Management for the Improvement of Power System Voltage Stability Margin

2006 ◽  
Author(s):  
Yongchun Su ◽  
Shijie Cheng ◽  
Jinyu Wen ◽  
Yonggao Zhang
Keyword(s):  
Power Generation ◽  
Power System ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Voltage Stability Margin ◽  
Generation Management

scholarly journals Voltage stability analysis using STATCOM

2021 ◽  
Author(s):  
Umang Patel
Keyword(s):  
Power System ◽  
Power Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Power System Stability ◽  
System Stability ◽  
Transmission Network ◽  
Voltage Stability Margin ◽  
Three Phase

Power system stability is gaining importance because of unusual growth in power system. Day by day use of nonlinear load and other power electronics devices created distortions in the system which creates problems of voltage instability. Voltage stability of system is major concerns in power system stability. When a transmission network is operated near to their voltage stability limit it is difficult to control active-reactive power of the system. Our objectives are the analysis of voltage stability margin and active-reactive power control in proposed system which includes model of STATCOM with aim to analyse its behavior to improve voltage stability margin and active-reactive power control of the system under unbalanced condition. The study has been carried out using MATLAB Simulation program on three phase system connected to unbalanced three phase load via long transmission network and results of voltage and active-reactive power are presented. In future work, we can do power flow calculation of large power system network and find the weakest bus of the system and by placing STATCOM at that bus we can improve over all stability of the system

scholarly journals Online monitoring of voltage stability margin using PMU measurements

2020 ◽  
Vol 10 (2) ◽  
pp. 1156
Author(s):  
Pankaj Sahu ◽  
M. K. Verma
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Online Monitoring ◽  
Reactive Power ◽  
Stability Margin ◽  
Operating Conditions ◽  
Accurate Estimation ◽  
Voltage Stability Margin ◽  
Power Loading ◽  
Bus System

With the growing smart grid concept it becomes important to monitor health of the power system at regular intervals for its secure and reliable operation. Phasor Measurement Units (PMUs) may play a vital role in this regard. This paper presents voltage stability monitoring in real time framework using synchrophasor measurements obtained by PMUs. Proposed approach estimates real power loading margin as well as reactive power loading margin of most critical bus using PMU data. As system operating conditions keep on changing, loading margin as well as critical bus information is updated at regular intervals using fresh PMU measurements. Simulations have been carried out using Power System Analysis Toolbox (PSAT) software. Accuracy of proposed Wide Area Monitoring System (WAMS) based estimation of voltage stability margin has been tested by comparing results with loading margin obtained by continuation power flow method (an offline approach for accurate estimation of voltage stability margin) under same set of operating conditions. Case studies performed on IEEE 14-bus system, New England 39-bus system and a practical 246-bus Indian power system validate effectiveness of proposed approach of online monitoring of loading margin.

scholarly journals Plotting of Voltage Contours in P-Q Plane Using Contour Evaluation Program

10.29007/qdtp ◽  
2018 ◽  
Author(s):  
Jyoti Iyer ◽  
Bhavik Suthar
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Constant Voltage ◽  
Evaluation Program ◽  
Voltage Stability Margin ◽  
Family Of Curves ◽  
Power Loading ◽  
The Relationship

In the current deregulated environment, determining loadability to various security limits is of great importance for the secure operation of a power system. The conventional P-V and Q-V curves are used to determine the voltage stability margin. This paper proposes to find the relationship between P and Q for a constant voltage on a particular bus using a contour evaluation program. The flexibility of this program allows generation of a family of curves which show the amount by which the reactive power loading on a particular bus needs to be modified so as to keep the voltage constant on that bus.

scholarly journals Voltage stability analysis using STATCOM

2021 ◽  
Author(s):  
Umang Patel
Keyword(s):  
Power System ◽  
Power Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Power System Stability ◽  
System Stability ◽  
Transmission Network ◽  
Voltage Stability Margin ◽  
Three Phase

Power system stability is gaining importance because of unusual growth in power system. Day by day use of nonlinear load and other power electronics devices created distortions in the system which creates problems of voltage instability. Voltage stability of system is major concerns in power system stability. When a transmission network is operated near to their voltage stability limit it is difficult to control active-reactive power of the system. Our objectives are the analysis of voltage stability margin and active-reactive power control in proposed system which includes model of STATCOM with aim to analyse its behavior to improve voltage stability margin and active-reactive power control of the system under unbalanced condition. The study has been carried out using MATLAB Simulation program on three phase system connected to unbalanced three phase load via long transmission network and results of voltage and active-reactive power are presented. In future work, we can do power flow calculation of large power system network and find the weakest bus of the system and by placing STATCOM at that bus we can improve over all stability of the system

scholarly journals Transmission congestion management considering voltage stability margin

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Nilesh K. Patel ◽  
Bhavik N. Suthar ◽  
Jalpa Thakkar
Keyword(s):  
Power Generation ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Congestion Management ◽  
Test System ◽  
Optimization Techniques ◽  
Voltage Profile ◽  
Transmission Congestion ◽  
Voltage Stability Margin

AbstractThis paper presents a solution for the transmission congestion management considering voltage stability issues using optimal generation rescheduling. While practicing congestion management using optimization techniques, the control variables remain under their upper or lower limits but it may lead to the lowered level of voltage security after optimization. To counterbalance this adverse effect, a modified objective function has been used. The reactive power generation rescheduling and reactive support from capacitors have been incorporated along with active power generation rescheduling to manage congestion as well as to improve the network voltage stability margin. The Random Inertia Weight Particle Swarm Optimization (RANDIW-PSO) algorithm has been employed in this paper to obtain optimized solutions. The proposed methodology is tested on the New-England test system for different realistic scenarios. The results confirm a noteworthy decline in congestion cost along with the improvement in network voltage stability margin. Moreover, system performance has been improved in terms of system power losses, increased reactive power reserve at generators and voltage profile.

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