SVC Devices Research Articles

Improving power system performance by integrating TCSC and SVC devices in the presence of stochastic renewable energy generators

Improving power system performance by integrating TCSC and SVC devices in the presence of stochastic renewable energy generators

Improved mountain gazelle optimizer based interactive distributed strategy to solving large scale OPF

This paper focuses on solving the multi-objective optimal power flow of large-scale power systems under critical loading margin stability with accuracy using a novel improved mountain gazelle optimizer (IMGO)-based flexible distributed strategy. Multi-shunt compensator-based flexible alternative current transmission systems (FACTS), such as SVC and STATCOM devices, are integrated at specified locations to exchange reactive power with the network. Several metaheuristic methods can solve the standard OPF related to small and medium test systems. However, by considering large-scale electric systems based on FACTS devices and renewable energy and by considering the operation under loading margin stability, the majority of these techniques fail to achieve a near-global solution because of the high dimension and nonlinearity of the problem to be solved. This study proposes the Multi-Objective OPF-Based Distributed Strategy (MO-OPFDS), a new planning strategy that optimizes individually and simultaneously various objective functions, in particular the total power loss (T∆P), and the total voltage deviation (T∆V). Standard MGO search is enhanced by automatically balancing exploration and exploitation throughout the search. The robustness of the proposed variant was validated on a large electric test system, the IEEE 118-Bus, and on the Algerian Network 114-Bus under normal conditions and at critical loading margin stability. The obtained results compared with several recent techniques clearly confirm the high performance of the proposed method in terms of solution accuracy and convergence behavior.

Optimization of position and rating of shunt and series connected FACTS devices for transmission congestion management in deregulated power networks

<abstract><p>Transmission congestions are caused by electricity trading between generators and distribution companies in a deregulated environment. Power system operation and security in liberalized scenarios are maintained by removing branch overloads. A flexible alternating current transmission system (FACTS) controller is installed in a suitable location to redistribute the power flow among the transmission lines so that the power flows are brought within the capacity of the lines. In this work, series-connected thyristor-controlled switched compensators (TCSCs) and shunt-connected Volt-Ampere reactive (VAR) static compensators (SVCs) are installed in appropriate locations to alter the power flow patterns and to remove overloads. It is proposed to reduce the overload of transmission lines by locating series and shunt connected FACTS devices at proper locations. The size and location of TCSC and SVC devices greatly affect their ability to meet a congestion management goal. An optimization process optimizes the location and size of these devices to maximize the congestion mitigation benefits of the TCSC and SVC controllers. In this work, the whale optimization algorithm (WOA) is used to optimize the value of the objective function by appropriately choosing the location and size of the FACTS controllers. This algorithm has a few parameters that are tuned to give the best overall results. A WOA-based method is proposed to optimize the size and location of the FACTS devices and is implemented on the IEEE-30 bus test case. The results were compared and found to be improved with those of other algorithms such as the particle swarm optimization algorithm (PSO) and the firefly algorithm (FFA).</p></abstract>

Multiplatform of SVC Device for User Experience Mobile Robot Teleoperation

The industrial revolution 4.0 and the rapid advancement of technology during pandemic era has made significant progress in robot industry. There are three types of robots based on the level of independent control such as autonomous mobile robots, semi-autonomous mobile robots, and controller mobile robots. Semi-autonomous mobile robot and Controlled mobile still require human intervention in carrying out the tasks. In this study, teleoperation on mobile robots is displayed on various platforms such as Smartphone, Virtual reality headset as a virtual reality platform, and Computer (SVC) device. A camera is used as a visual sensor that dispatches the information of the surroundings to each platform. The controller used for the teleoperation varies depending on the platforms. The computer platform uses the arrow key on the keyboard. The smartphone platform uses touchscreen. Virtual reality uses Oculus Touch that has been integrated with Oculus Quest 2. ROS# as a robot API framework with Unity engine is used for the communication process between the robot and each platform. Teleoperation Experiments on SVC devices refer to four parameters including task completion rates, task time, satisfaction, and error counts. all these parameters will be combined into a single usability metric (SUM). The SUM results from SVC devices show 54.9% on Smartphones, 79.5% on VR devices, and 90.4% on Computers.

Simple Strategy for Finding Optimal Location and Size of Distributed Generators and SVC Devices in Radial Distribution Systems

Simple Strategy for Finding Optimal Location and Size of Distributed Generators and SVC Devices in Radial Distribution Systems

New strategy to enhance AC grid performance with SVC device in an optimal location

New strategy to enhance AC grid performance with SVC device in an optimal location

Voltage stability assessment using TCSC and SVC based FACTS controllers

The Most causes of Voltage instability is the sources of reactive power .In order to protect the total system from voltage instability the reactive loads can be reduced or extra reactive power can be added to reach the Voltage collapse point .The Flexible AC transmission devices(FACTS) have made it flexible and possible to prevent Voltage instability by Fast and Flexible control method . Voltage collapse point is predicted with TCSC and SVC devices and is compared with each other. The Voltage stability Indicator is derived to identify the voltage collapse point. it is concluded that voltage stability index provides a simple means to predict vulnerability of a bus in a Multibus system for voltage collapse.

Economical Insertion of Static Reactive Power Compensators in Power Systems (Dept.E)

The appearance of flexible AC Transmission System (FACTs) controllers Is completely changing the way transmission systems are controlled and operated. Most facts controllers are basically based on variable shunt and/Qr series compensation of transmission systems. One of the most famous type of FACTs Is the Static VAr Compensator to r (SVC), which is basically used liS It ture for both voltage and voltage stability problems. However, SYC may also affects the Available Transfer Capability of the system (ATC), line Overload and losses. As the power system is economical1y operated, hence it is important to study the. economical effects of SVC on power system opera lion . This paper presents a construction of II complete Cost Benefit Analysis (CBA) model (or SVC insertion into power system 10 select the best location and size for that insertion . Generally CBA is based on comparison between the cost and benefit for a specific alternative. In our case, the cost components are mainly the cost of the SVC device and its cost of installation anti maintenance. While the benefit components are that due to Improving voltage stability in terms of increasing the voltage stability margin (VSM), benefits due to extending the ATC, and the benefits as a result of n:iievillg line overloads in the system in terms of reducing the line overload (LO) and finally reducing the system losses. However for the same hardware the coast is the same. So, the. most economical alternative is the one with the maximum total benefit. This paper also, introduces a new Unified Index (UI) (or ranking contingencies Tile proposed C DA algorithm is tested for SVC in5ertion into the I EEE 26-bus system subject to contingencies.

Analysis of a SVC Device Filter Capacitor Bank Circuit Breaker Explosion

When SVC device is in operation mode, it can provide fast dynamic reactive power compensation for the system when the power grid is disturbed greatly, and it can improve the voltage stability of the system. With the growing popularity of SVC devices in China, it is particularly important to study the faults of SVC devices in the process of operation. In this paper, the recent explosion of filter capacitor bank breaker in SVC device of a substation which was put into operation earlier in China is analyzed in detail. Through the inspection of equipment after failure, combined with the background of computer monitoring system, relay protection, and fault recording, the failure process is analyzed, and finally five preventive measures are put forward. It can provide guidance for the operation and maintenance of other station capacitor bank breakers, especially for the station capacitor bank breakers installed with SVC device, so as to ensure the safe and stable operation of the power grid.

Optimization of power flow through facts in electrical networks

A mathematical model is presented for optimizing power flows in an electric network with a flexible controlled alternating current power transmission device - FACTS. The range of questions on the problem of optimizing the power flow in electric networks with one of the FACTS devices, the SVC static power factor compensator, has been expanded and investigated. The Lagrange function for the SVC device is proposed, which serves as the basis for obtaining a linearized equation and determining the optimum of the objective function.The method and algorithm of the optimization problem in the electric power system containing devices of the FACTS technology have been synthesized. The mathematical model allows for flexible and reliable optimization of the electrical power system. Flexibility is explained by the universality of the model, and reliability is explained by the high convergence rate of the Newton method used.

Optimal Location of SVC Devices for Transmission Congestion Management in a Deregulated Power System

Optimal Location of SVC Devices for Transmission Congestion Management in a Deregulated Power System

Volt / VAR Regulation in Energy Transmission Systems Using SVC and STATCOM Devices

To ensure energy continuity in the interconnected power systems, production and consumption amounts should be in balance, and that can be possible by providing constant voltage and frequency. Otherwise, undesirable large dynamic oscillations, voltage collapse may occur, and the quality of the electrical energy deteriorates. In this study, the power system of the Denizli Region in the Western Mediterranean Region is modeled using realistic national data. The simulation study is carried out to obtain the voltages, active and reactive powers of buses in the case of no-fault and fault occurrence. Using FACTS (Flexible Alternating Current Transmission Systems) technology such as SVC and STATCOM, the power systems can be controlled, and the carrying capacities can be improved within specified limits. Facts devices are capable of producing and consuming reactive power depending on immediate needs, safe and operating flexibility, and having a high reaction time in the simulation studies. The maximum load limits are increased, and the control of the power system is facilitated. STATCOM provides 31.09 % more achievement with respect to SVC device at energy production and consumption rates for the modeled pilot region. The reliability of the power system has been increased against a voltage collapse, thanks to the SVC and STATCOM controllers. Furthermore, the voltage stability of the generator is also raised, and correspondingly the capacity of the power system enhances. The results are compared to the existing system, and the obtained improvements may be assessed for the enhancement of the interconnected network grid of Turkey.

A contribution to the control of voltage and power of the interconnection between two decentralized electrical grids with an optimal localization of the SVC devices in real-time

<p>Several problems related to the power grid in the region of Adrar, in southern Algeria, where it is not connected to the Algerian national network. This region contains many energy resources for power stations, wind and photovoltaic farms. The industrial development in this region requires a connection with the national network to rationalize renewable energy sources and allow sufficient capacity of power for the two grids. The work involved in studying the possibility of interconnection between the grid of Adrar region and the Algerian national network. Modeling, control and real-time analysis of various scenarios have been achieved. A SVC with an optimal location has controlled the improvement of the voltage of the interconnected grid.</p>

Interline Power Flow Controller (IPFC) to Improve the Voltage Stability and Contingency Analysis in Power System

The latest flexible AC transmission systems (FACTS) device, known as interline power flow controller (IPFC), is the most versatile device used for controlling power flows in multiple transmission lines. When the load on the transmission line is drastically increased the power losses and voltage deviation increase in the system leading to line outages and power system network may become unstable. An algorithm for the IPFC optimal location is proposed in this paper. The proposed algorithm improves voltage stability under the over loaded line outage contingency in a power system network. The transmission line outages are calculated and ranked on the basis of their performance index. The proposed method is tested for IEEE-30 bus system by using MATLab software and the results are compared with SVC device for the same configuration of the network.

Optimal allocation of SVC in electric power system for loss minimisation and control voltage using hybrid ABC

In our work, we present a simulation of the optimal location problem of three FACTS devices (SVC) in an electric power network. The chosen criterion is the minimisation of total active losses under specified constraints. Solving the problem will be carried out by a metaheuristic method. Metaheuristics are general optimisation methods using smart rules to navigate the space of solutions. They produce good solutions. The iterative method Gauss-Seidel will be used for the load flow and optimal location of three SVC devices will be done by hybrid bees' colonies algorithm (HBCA). An application will be made on a test network IEEE-57 bus.

Firefly Algorithm in Determining Maximum Load Utilization Point and Its Enhancement through Optimal Placement of FACTS Device

In a Power System, load is the most uncertain and extremely time varying unit. Hence it is important to determine the system’s supreme acceptable loadability limit called maximum loadability point to accommodate the sudden variation of load demand. Nowadays the enhancement of the maximum loadability point is essential to meet the rapid growth of load demand by improvising the system’s load utilization capacity. Flexible AC Transmission system devices (FACTS) with their speed and flexibility will play a key role in enhancing the controllability and power transfer capability of the system. Considering the theme of FACTS devices in the loadability limit enhancement, in this paper maximum loadability limit determination and its enhancement are prepared with the help of swarm intelligence based meta-heuristic Firefly Algorithm(FFA) by finding the optimal loading factor for each load and optimally placing the SVC (Shunt Compensation) and TCSC (Series Compensation) FACTS devices in the system. To illuminate the effectiveness of FACTS devices in the loadability enhancement, the line contingency scenario is also concerned in the study. The study of FACTS based maximum system load utilization acceptability point determination is demonstrated with the help of modified IEEE 30 bus, IEEE 57 Bus and IEEE 118 Bus test systems. The results of FACTS devices involvement in determining the maximum loading point enhance the load utilization point in normal state and also help to overcome the system violation in transmissionline contingency state. Also the firefly algorithm in determining the maximum loadability point provides better search capability with faster convergence rate compared to that of Particle swarm optimization (PSO) and Differential evolution algorithm.

Analysis of Power Electronics Technology and Reactive Compensation Technology of Power System

<p>Rapid development of power electronics technology, successive emerging of new materials and new structural devices, and improvement of computer technology provide vigorous support for actual application of modern control technology. The researches on application of power electronics technology in power system become increasingly extensive and profound, thus enormously supporting and developing reactive compensation technology of power system. This article has discussed application and development of power electronics technology in power system, analyzed reactive power and harmonic wave in power system, briefly introduced the development and research of reactive compensation technology at home and abroad, intensively promoted the development and application of SVC device, and put forward a series of design solutions to lower avoidable energy loss of the whole power system. </p>

GA Based Optimal Placement Of SVC For Minimizing Installation Cost And Voltage Deviations

Power system under heavily loaded conditions is at high risks of consequent voltage instability problem. Voltage deviation minimization is the reliable indicators of voltage security of power networks. The aim is to minimize the voltage deviation and installation cost under increasing load condition in power system network. GA is used to solve the optimization problem in this paper which is one of the heuristic methods. Genetic Algorithm optimizes the location and size of the SVC. The effectiveness of the proposed work is tested in IEEE-30 Bus test system. It has also been observed that the proposed algorithm can be applied to larger systems and do not suffer with computational difficulties. The obtained results show that the allocation of SVC device with the proposed method considerably enhanced the voltage stability and reduce installation cost.

Analysis of STATCOM, SVC and UPFC FACTS Devices for Transient Stability Improvement in Power System

Analysis of STATCOM, SVC and UPFC FACTS Devices for Transient Stability Improvement in Power System

Analysis on Energy Loss of SVC Based on TCR and FC Mode Method

In recent years, as the SVC device have also been used for DC ice melting system, the installment is still on the rise, it is necessary to study the loss situation. This paper firstly analyzed the theory of the loss of its each part of the device, and then finished a simulation based on the PSCAD software. We hope the research can give some value guidance on SVC assembled for the power grid.