scholarly journals Voltage Slump Compensation using Facts Controllers on Power System

2019 ◽  
Vol 8 (11) ◽  
pp. 1621-1626
Keyword(s):  
Integrated Circuits ◽  
Power System ◽  
Power Quality ◽  
Phase Angle ◽  
Simulation Program ◽  
Facts Controllers ◽  
Simulation Results ◽  
Power Quality Conditioner ◽  
Theoretical Results ◽  
Shunt Impedance

This article dispense the different FACTS controllers integrated circuits using a simulation program that emphasis with PSPICE. The FACTS controller controls series impedance, shunt impedance, voltage, current and phase angle. In this paper, a simplified circuit model of Series Compensator and Unified Power Quality conditioner has been analyzed and the simulation results coincides with the theoretical results..

Power Quality Disturbance Research of Grid-Connected Wind Generation Based on Fractional Fourier Transform with Wavelet Entropy

2011 ◽  
Vol 130-134 ◽  
pp. 1600-1604
Author(s):  
Hua Li Chen ◽  
Yun Lian Sun
Keyword(s):  
Fourier Transform ◽  
Power System ◽  
Power Quality ◽  
Fractional Fourier Transform ◽  
Wind Generation ◽  
Wavelet Entropy ◽  
Time Frequency ◽  
System A ◽  
Power Quality Disturbance ◽  
Simulation Results

In the process of connected wind generation with the power grid, the classification and recognition of power quality disturbance signals which are researched by the scholars at home and abroad are always the hot issues in Power System. A new method using Fractional Fourier Transform (FRFT) with Wavelet Entropy is presented for recognizing the signals of PQ disturbance based on the characteristics of power quality (PQ) signals. FRFT have better time-frequency aggregation and can choose better domain instead of and make PQ disturbance recognize more accurately with wavelet entropy. Simulation results demonstrate its effectiveness.

scholarly journals Improvement of Power Quality in Fourteen-Bus System with Three and Five Level IPFC

2019 ◽  
Vol 8 (2) ◽  
pp. 1672-1677
Keyword(s):  
Power System ◽  
Power Quality ◽  
Power Flow ◽  
Reactive Power ◽  
Quality Enhancement ◽  
Power Fluctuation ◽  
Real Power ◽  
Bus Structure ◽  
Simulation Results ◽  
Power Flow Controller

The power fluctuation is a major problem faced by the consumers in power system,to resolve thisInterline Power Flow Controlleris used. This article proposes three and five-level Interline Power Flow Controller for power quality enhancement of fourteen bus structure. The main objective of this article is to diminish the THDcreated by IPFC. Simulations carried out and it results indicate that there is an improvement in the output of IPFC in terms of THD, real power, and reactive power. The simulation results indicate that THD of Five Level Based IPFC (FLBIPFC) is less than that of the Three-Level Based IPFC (TLBIPFC) for fourteen bussystem.

Power System Subsynchronous Oscillations Electromagnetic and Electromechanical Transient Hybrid Real-Time Simulation Based on RTDS

2012 ◽  
Vol 433-440 ◽  
pp. 2850-2855
Author(s):  
Lei Shi ◽  
Xiang Ning Xiao
Keyword(s):  
Power Plant ◽  
Power Systems ◽  
Power System ◽  
Real Time ◽  
Hybrid Simulation ◽  
Simulation Program ◽  
Simulation Technology ◽  
Real Time Simulation ◽  
Time Simulation ◽  
Simulation Results

In this paper, power system electromagnetic and electromechanical transient hybrid real-time simulation technology is expounded in details, which has advantages of the electromagnetic transient simulation program and electromechanical ones. The more details needed to analyze the dynamic characteristics of power systems are provided by this hybrid simulation technology, and the scale of power system simulated is not limited in the hybrid simulation program. The hybrid simulation program is applied to analyze the power system subsynchronous oscillation problem occurred in a power plant with 4 turbine generators located in the northwestern China. According to the simulation results, it is clear that the stability of generators is threatened by the subsynchronous oscillations caused by capacitor series compensation in the transmission line connecting the power plant and the load center system. In meantime, the effectiveness of the countermeasure is validated simultaneously by the hybrid simulation results.

scholarly journals Stability Analysis of Power System using FACT Controller

2020 ◽  
Vol 9 (3) ◽  
pp. 3732-3735
Keyword(s):  
Power System ◽  
Power Quality ◽  
Direct Current ◽  
Integrated Circuit ◽  
Harmonic Distortion ◽  
Storage Device ◽  
Power Filter ◽  
Power Filters ◽  
Unified Power Quality Conditioner ◽  
Power Quality Conditioner

The Stability of power system is influenced by different elements such as harmonic distortion attributed to non-linear loads, like unregulated voltage and unstudy current because of sag and swell and switching capacity. One of the effective methods is to make use of an integrated circuit of active shunt and series power filters such as Unified power quality conditioner in short called as UPQC. Such instrument binds a active shunt power filter with a active series power filter in Sequential formation, to simultaneously make up for the regular supply of voltage and current or to remove voltage and current disturbances in a power allocation and networking system. In present article, a latest layout of Unified power quality conditioner in short called as UPQC has been presented, consisting of a electromechanical device such as Direct current to direct current converter and the storage device joined to the dirct current (DC) link of the UPQC to counter the voltage disturbances.

Delay Incurred in Wireless Sensor Networks Using N-Policy M/M/1 Queuing Model and its Mitigation

2019 ◽  
Vol 8 (2) ◽  
pp. 40-52 ◽  
Author(s):  
Sanjeev Ghosh ◽  
Srija Unnikrishnan
Keyword(s):  
Wireless Sensor Networks ◽  
Wireless Sensor Network ◽  
Integrated Circuits ◽  
Sensor Node ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Queuing Model ◽  
Mean Waiting Time ◽  
Simulation Results ◽  
Theoretical Results

Technological advancements in low power integrated circuits and wireless communications have led to the feasibility of using a network of sensors to be used for the collection, processing, analysis, and distribution of important information, collected in a wide variety of environments. Sensor nodes in a wireless sensor network face the issue of scarcity of power and therefore, optimal use of available power is of prime importance. The authors study and analyze a technique that aims to reduce the consumption of power. In this technique the radio of the sensor node is switched on only when the number of packets in a queue exceeds a certain threshold; this however introduces delay in the processing of the packets. The authors analyze the performance of this system with respect to the power consumption and mean waiting time and suggest a way to mitigate the delay. The simulations performed show that the simulation results are close to the theoretical results thus indicating the validity of the technique studied.

scholarly journals POWER QUALITY IMPROVEMENT USING CUCKOO SEARCH BASED MULTI-LEVEL FACTS CONTROLLER

2021 ◽  
Author(s):  
B. Srinivasa Rao ◽  
◽  
D. Vijaya Kumar ◽  
K. Kiran Kumar ◽  
◽  
...  
Keyword(s):  
Power System ◽  
Power Quality ◽  
Optimization Technique ◽  
Cuckoo Search ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Power Quality Improvement ◽  
Power Quality Conditioner ◽  
Ac Transmission ◽  
Harmonic Distortions

Nowadays, the improvement of power quality is the major concern in power system scenario. These problems mainly caused due to utilization of different load conditions to the power system. To mitigate these problems different methods are implemented in literature. As per literature analysis the one of the Flexible AC Transmission System called as unified power quality conditioner (UPQC) plays a key role. The series and shunt controllers of UPQC designed with 9-level inverters to reduce the harmonic distortions. An instantaneous PQ theory is used to generate the reference signals required for series and shunt controllers along with dq-transformation analysis. A Cuckoo optimization technique is used to tune the parameters of PI controller in shunt controller to achieve better harmonic distortions and improve power quality. This proposed system is to be tested and verified in MATLAB/SIMULINK.

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