scholarly journals Investigating the application of Static Synchronous Compensator (STATCOM) for mitigating power transmission line losses

2017 ◽  
Author(s):  
◽  
Adebiyi Abayomi Aduragba
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Reactive Power ◽  
Power Transmission ◽  
Test System ◽  
Voltage Source ◽  
Voltage Profile ◽  
Power Losses ◽  
Static Synchronous Compensator ◽  
The Impact

Voltage instability and increased power loss on transmission lines are major challenges in power transmission due to ever increasing load growth. This work investigates the effect of Static Synchronous Compensator (STATCOM) to mitigate power losses and enhance the voltage stability of a transmission system. STATCOM, a shunt-connected power electronic device, operate as a Voltage Source Converter (VSC) to improve power transfer capacity of transmission lines by injecting a set of three-phase balanced sinusoidal current with controllable magnitude and phase angle into the transmission lines to regulate the line voltage and compensate for reactive power at the Point of Common Coupling (PCC). To validate the capacity of STATCOM in this light, a modified model of IEEE 14 bus test system was simulated using DIgSILENT PowerFactory v15. Four different load profiles were included by increasing the base load in a step of 10%. In each case, power flow was run with and without STATCOM incorporated in the network with a view to determine the impact of STATCOM on bus voltage and transmission line losses. The simulation results are obtained were recorded and analyzed. It is noted that there was sufficient improvement in the new voltage profile obtained for the weak buses of the system, the active and reactive power losses were mitigated by 17.73% and 24.80% respectively when STATCOM was incorporated at normal load. The results showed that STATCOM could give quick voltage support to reduce the likelihood of voltage collapse and mitigate power losses along the transmission lines. Reduction of reactive power losses along the lines is higher than the active power losses resulting in the improvement of the voltage profile as the device is connected to the system.

scholarly journals Modeling for Development of Simulation Tool: Impact of TCSC on Apparent Impedance Seen by Distance Relay

2018 ◽  
Vol 8 (5) ◽  
pp. 3332-3337
Author(s):  
N. M. Khoa ◽  
D. D. Tung
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Short Circuit ◽  
Simulation Software ◽  
Voltage Source ◽  
Power Transmission Line ◽  
Distance Protection ◽  
Protection Relay ◽  
The Impact ◽  
Distance Protection Relay

The impact of thyristor controlled series capacitor (TCSC) on distance protection relays in transmission lines is analyzed in this paper. Voltage and current data are measured and collected at the relay locations to calculate the apparent impedance seen by distance protection relays in the different operating modes of the TCSC connected to the line. Short-circuit faults which occur at different locations on the power transmission line are considered in order to locate the fault for the purpose of evaluating the impact of TCSC on the distance protection relay. Matlab/Simulink simulation software is used to model the power transmission line with two sources at the two ends. Voltage source, transmission line, TCSC, voltage and current measurement, and discrete Fourier transform (DFT) blocks are integrated into the model. Simulation results show the impact of TCSC on the distance protection relay and determine the apparent impedance and fault location in the line.

scholarly journals Transient Stability Enhancement of Multimachine Power System Using Robust and Novel Controller Based CSC-STATCOM

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Sandeep Gupta ◽  
Ramesh Kumar Tripathi
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Reactive Power ◽  
Controller Design ◽  
Current Source ◽  
Test System ◽  
Vital Role ◽  
Static Synchronous Compensator ◽  
Ac Transmission ◽  
The Impact

A current source converter (CSC) based static synchronous compensator (STATCOM) is a shunt flexible AC transmission system (FACTS) device, which has a vital role as a stability support for small and large transient instability in an interconnected power network. This paper investigates the impact of a novel and robust pole-shifting controller for CSC-STATCOM to improve the transient stability of the multimachine power system. The proposed algorithm utilizes CSC based STATCOM to supply reactive power to the test system to maintain the transient stability in the event of severe contingency. Firstly, modeling and pole-shifting controller design for CSC based STATCOM are stated. After that, we show the impact of the proposed method in the multimachine power system with different disturbances. Here, applicability of the proposed scheme is demonstrated through simulation in MATLAB and the simulation results show an improvement in the transient stability of multimachine power system with CSC-STATCOM. Also clearly shown, the robustness and effectiveness of CSC-STATCOM are better rather than other shunt FACTS devices (SVC and VSC-STATCOM) by comparing the results in this paper.

Optimal Series Capacitor Compensation for Transmission Lines

2019 ◽  
Vol 16 (8) ◽  
pp. 3455-3460
Author(s):  
Chun Lim Hiew ◽  
Jacqueline Lukose
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Voltage Stability ◽  
Optimization Technique ◽  
Stability Index ◽  
Test System ◽  
Total Power ◽  
Voltage Profile ◽  
Series Capacitor Compensation ◽  
Series Capacitor

Nowadays, voltage stability issues are the main problems around the world and therefore it is important that to maintain stable voltage stability. Series capacitor compensation plays an important role in the transmission line because it can improve the voltage stability as compared to shunt compensation. The Thyristor-Controlled Series Capacitor (TCSC) is selected in this project for providing capacitor compensation because its ability to control the amount of compensation in the transmission line, and operating in three different mode of region, which are resonance, capacitive, and inductive regions. The Fast Voltage Stability Index (FVSI) is used to determine the system’s stability and determine the weakest line in the system for TCSC placement. The TCSC sizing is optimized by using Differential Evolution (DE) optimization technique. All these processes are simulated on Institute of Electrical and Electronics Engineer (IEEE) 14-bus test system by using MATLAB. The proposed methodology was carried out in few tests, which are system contingency test, line outage test, power loss test, voltage profile improvement test and variable TCSC location. Based on the results, the overall voltage stability of the system was improved. The voltage magnitude for each bus had improved and the total power losses also reduced. Therefore, the optimization is successful and the study’s aim is achieved.

scholarly journals Mal-Operation of Mho Relay In Transmission Line Due To Presence of TCSC

2019 ◽  
Vol 8 (3) ◽  
pp. 4328-4333
Keyword(s):  
Transmission Line ◽  
Fault Location ◽  
Reactive Power ◽  
Power Transmission ◽  
Transmission System ◽  
Simulation Software ◽  
Normal Operation ◽  
Distance Protection ◽  
Voltage Profile ◽  
Angle Variation

Distance protection is simple and it provides fast response to clear the fault. Distance protection is also providing primary and remote backup function depending upon distance of transmission line. Distance protection uses various relays like mho relay/admittance relay, impedance relay and reactance relay. In power transmission system, Flexible AC Transmission System (FACTS) controllers are used to increase power transfer capability and reactive power control, but distance relay get affected due to presence of FACTS devices. This may create the stability issues, security and it may affect on voltage profile. The changes in impedance level would affect the accuracy of distance protection. This paper represents the effect of TCSC on operation of mho relay in transmission line. The work presented here emphasis on the interaction of TCSC on distance protection and their performances under different condition i.e., load angle variation, variation of SCL, different fault location. Design and control performance of MHO relay during normal operation as well as during variation in different condition is verified by using PSCAD simulation software.

scholarly journals Siting and Sizing of DG in Medium Primary Radial Distribution System with Enhanced Voltage Stability

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Sanjay Jain ◽  
Ganga Agnihotri ◽  
Shilpa Kalambe ◽  
Renuka Kamdar
Keyword(s):  
Distributed Generation ◽  
Radial Distribution ◽  
Distribution System ◽  
Voltage Stability ◽  
Reactive Power ◽  
Voltage Profile ◽  
Power Losses ◽  
Radial Distribution System ◽  
Power Loss Reduction ◽  
The Impact

This paper intends to enumerate the impact of distributed generation (DG) on distribution system in terms of active as well as reactive power loss reduction and improved voltage stability. The novelty of the method proposed in this paper is the simple and effective way of sizing and siting of DG in a distribution system by using two-port Z-bus parameters. The validity of the method is verified by comparing the results with already published methods. Comparative study presented has shown that the proposed method leads existing methods in terms of its simplicity, undemanding calculation procedures, and less computational efforts and so does the time. The method is implemented on IEEE 69-bus test radial distribution system and results show significant reduction in distribution power losses with improved voltage profile of the system. Simulation is carried out in MATLAB environment for execution of the proposed algorithm.

Enhancement of Voltage Profile By Using Static Synchronous Compensator (Statcom) in Power System Networks

2016 ◽  
Vol 8 (02) ◽  
pp. 109-120 ◽  
Author(s):  
Ziaur Rahman ◽  
Amit Tiwari
Keyword(s):  
Power System ◽  
Test Data ◽  
Reactive Power ◽  
Power Transmission ◽  
Standard Test ◽  
Transmission System ◽  
Load Flow ◽  
Voltage Profile ◽  
Static Synchronous Compensator ◽  
Bus System

Voltage profile is one of the concerned issues in power system network studies. The voltage profile decay can be experienced by the system when system is subjected to load increment or disturbances. Unscheduled increment of load variation in a power transmission system has driven the system to be stressful, leading to potential cascading trip on the entire system. and capacitor placement. In this paper we introduced the Static Synchronous Compensator (STATCOM), a shunt connected Flexible AC Transmission System (FACTS) device which is capable to regulate the voltage profile by generating or observing the reactive power. Our objective has been tested with different size and different location of STATCOM on IEEE-4 Bus System and IEEE-9 Bus System by using the Newton-Raphson load flow method in MATLAB environment. In this work, firstly we have analysed IEEE-4 bus system and IEEE-9 bus system under the standard test data and after that analysed IEEE- 4 bus system and IEEE-9 bus system with STATCOM under the standard test data. After that, we have compared all the load flow results and observed the effect of STATCOM on voltage profile The different sizes of STATCOM used in the test systems are 20,40,60,80and 100MVAr.

scholarly journals Impacts of MT-HVDC Systems on Enhancing the Power Transmission Capability

2019 ◽  
Vol 10 (1) ◽  
pp. 242 ◽  
Author(s):  
Ali Raza ◽  
Armughan Shakeel ◽  
Ali Altalbe ◽  
Madini O. Alassafi ◽  
Abdul Rehman Yasin
Keyword(s):  
Transmission Lines ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Power Transmission ◽  
Test System ◽  
Voltage Source ◽  
Power Transfer ◽  
High Voltage Direct Current ◽  
Transfer Capability ◽  
Excellent Control

In this paper, improvement in the power transfer capacity of transmission lines (TLs) by utilizing a multi-terminal high voltage direct current (MT-HVDC) grid is discussed. A multi-terminal HVDC grid designed for wind power can be used as an extra transmission path in interconnected systems during low wind conditions, and provides extra dynamic stability and security. This paper deals with the power transfer capacity as well as the small signal (SS) stability assessments in less damped oscillations accompanying inter area modes. Computation of the maximum allowable power transfer capability is assessed via DC optimal power flow-based control architecture, permitting more power transfer with a definite security margin. The test system is assessed with and without the exploitation of MT-HVDC grid. Simulation work is done using a generic computational framework i.e., international council on large electric systems (CIGRE) B4 test bench with a Kundur’s two area system, shows that voltage source converters (VSCs) provide excellent control and flexibility, improving the power transfer capability keeping the system stable.

scholarly journals A Discrete Wavelet Transform based STATCOM Compensated Transmission Line

2018 ◽  
Vol 7 (4.5) ◽  
pp. 61
Author(s):  
S. K Mishra ◽  
L. N Tripathy ◽  
S. C Swain
Keyword(s):  
Wavelet Transform ◽  
Transmission Line ◽  
Discrete Wavelet Transform ◽  
Transmission Lines ◽  
Reactive Power ◽  
Spectral Energy ◽  
Discrete Wavelet ◽  
Current Signal ◽  
Static Synchronous Compensator ◽  
Phase Current

This paper describes the Discrete Wavelet transform (DWT) applied for classification and detection of fault with respect to the position of the Static Synchronous Compensator (STATCOM).  STATCOM is positioned at mid-point of the transmission line. The reactive power injection or absorption (i.e shifting phase voltage with respect to bus voltage) depends upon the apparent impedance during the fault. The current signals of each phase are retrieved from both sending and receiving end of three phase transmission line synchronously. It starts processing through DWT to acquire spectral energy (SE) content of each phase current signals from both end of the transmission line. Differential spectral energy (DSE) of each phase current signals (i.e SE of current signal recovered from sending end minus SE of current signal recovered at receiving end) of transmission lines is used to record the fault configuration. 

scholarly journals Recent Advances of STATCOM in Power Transmission Lines – A Review

2021 ◽  
Vol 12 (3) ◽  
pp. 4621-4626
Author(s):  
Mr. L NarayanaGadupudi Et.al
Keyword(s):  
Transmission Lines ◽  
Reactive Power ◽  
Power Transmission ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Frequency ◽  
Power Transmission Lines ◽  
Switching Losses

 Internal Liability of power system transmission lines influenced by the turbulences owing to catastrophic disasters. In order to achieve Constant Voltage Stability at both ends of the transmission lines, Static Synchronous Compensator (STATCOM) is imperative.  Voltage source Converter mechanisms augment with switching frequency control methodologies are widely adopted to regulate the reactive power. By deliberating IEEE Standards, the minimization of Total Harmonic Distortion (THD) is conceivable with STATCOM. This paper depicts the advancement of VSC based STATCOM approaches and the methodologies to minimize the switching losses. Economical management of High-Power ratings systems is also discussed in this paper

scholarly journals Optimal location of unified power flow controller genetic algorithm based

2020 ◽  
Vol 11 (2) ◽  
pp. 886
Author(s):  
Sana Khalid Abdul Hassan ◽  
Firas Mohammed Tuaimah
Keyword(s):  
Genetic Algorithm ◽  
Power Generation ◽  
Power System ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Reactive Power ◽  
Optimal Location ◽  
Power Losses

<p>Now-a-days the Flexible AC Transmission Systems (FACTS) technology is very effective in improving the power flow along the transmission lines and makes the power system more flexible and controllable. This paper deals with overload transmission system problems such as (increase the total losses, raise the rate of power generation, and the transmission line may be exposed to shut down when the load demand increase from the thermal limit of transmission line) and how can solve this problem by choosing the optimal location and parameters of Unified Power Flow Controllers (UPFCs). which was specified based on Genetic Algorithm (GA) optimization method, it was utilized to search for optimum FACT parameters setting and location based to achieve the following objectives: improve voltages profile, reduce power losses, treatment of power flow in overloaded transmission lines and reduce power generation. MATLAB was used for running both the GA program and Newton Raphson method for solving the load flow of the system The proposed approach is examined and tested on IEEE 30-bus system. The practical part has been solved through Power System Simulation for Engineers (PSS\E) software Version 32.0 (The Power System Simulator for Engineering (PSS/E) software created from Siemens PTI to provide a system of computer programs and structured data files designed to handle the basic functions of power system performance simulation work, such as power flow, optimal power flow, fault analysis, dynamic simulations...etc.). The Comparative results between the experimental and practical parts obtained from adopting the UPFC where too close and almost the same under different loading conditions, which are (5%, 10%, 15% and 20%) of the total load. can show that the total active power losses for the system reduce at 69.594% at normal case after add the UPFC device to the system. also the reactive power losses reduce by 75.483% at the same case as well as for the rest of the cases. in the other hand can noted the system will not have any overload lines after add UPFC to the system with suitable parameters.</p>

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