Here is a question for interested readers what is power factor and how can we achieve power factor compensation. The statcom contains an insulated gate bipolar transistor igbt based voltage source converter for voltage control and reactive power compensation. Pdf an overview of facts devices used for reactive power. This results in distortions in the current and voltage waveforms. In relation to the svc, the statcom differs in that itcan synthesize the reactive power from small values of storing elements, and, when operating in thelinear region, it exhibits a similar behavior to the svc. Professor, lakshmi narain college of technology bhopal, india abstract a power quality problem refers to the problems that are caused by the rise of a non standard voltage or current or frequency. Rpc theory the beer mug analogy is useful to understand the theory of reactive power compensation. Reactive power compensation using dstatcom 22 device, a coupling transformer connected in shunt to the distribution network through an interfacing inductor. The second generation facts devices work like angle and module controlled voltage sources and without inertia, based in converters, employing electronic.
Shunt compensation for improvement of voltage stability using. Study of reactive power compensation using statcom a project submitted in partial fulfillment of the requirement for the degree of bachelor of technology in electrical engineering by abhijeet barua 107ee015 pradeep kumar 107ee050 department of electrical engineering national institute of technology rourkela769008, orissa. Reactive power compensation installation of new reactive. Reactive power compensation using facts device easychair. Cost allocation of transmission line using fact devices ijitee. Pdf reactive power compensation by using facts devices. Another problem that reactive power compensation addresses is the instability of the grid. This operation is performed based on two basic principles where one is used in multipulse converters and the other one for pwm controlled multilevel converters. Reactive power compensation by using facts devices under nonsinusoidal condition by using matlab simulation ijsrdvol.
This is all about the importance of reactive power. May 25, 2018 ac power supply systems produce and consume two types of powers. Facts technology for reactive power compensation and system control h. Real power of the smib system with varying compensation. Figure 1 shows the principles and theoretical effects of shunt reactive power compensation in a basic ac system, which comprises a source v 1, a power line and a typical inductive load. Modern electrical installations supply power to a wide variety of nonlinear loads, where the current drawn does not have a linear relationship with the voltage supplied. Simulation study for reactive power compensation using. From then on, various researches were conducted on the application of high power semiconductors in transmission systems. In this paper, we will show how the contribution of wind farms affects the power distribution network and how the power.
Objective what is power quality why reactive power compensation is needed introduction to statcom and its working how statcom helps in increasing the reliability of power supply from the utility grid using matlabsimulink results. Power, as we know, consists of two components, active and reactive power. Energy storage and reactive power compensation can minimize realreactive power imbalances that can affect the surrounding power system. Available transfer capability without svc and with svc connected at different busses discussed at last of this paper. Reactive power compensation by using facts devices under. To limit these effects, reactive power compensation equipment, such as shunt capacitor banks, is usually installed. Reactive power compensation in power transmission network. Why is reactive power compensation needed in a power system.
Study of reactive power compensation using statcom a project submitted in partial fulfillment of the requirement for the degree of bachelor of technology in electrical. A seminar report on reactive power compensation byprajnya priyadarsini mishra regd. The the control strategies are based on voltage, power, issue of reactive power compensation is seen from angle or reactive power flow control using classical. The statcom static synchronous compensator is the shunt connected facts devices which are connected to line via voltage source converter. Facts devices improve the reactive power flow in system thereby improving voltage stability and these are used for controlling transmission voltage, power flow, dynamic response and reducing reactive losses in transmission lines. Thus, the main case that should be handled in reactive power compensation by using statcom is to control the magnitude of compensator voltage v i. Reactive power compensation using statcom ac power. The history of facts controllers can be traced back to 1970s when hingorani presented the idea of power electronic applications in power system compensation. The power quality devices are power electronic converters connected in either series or parallel with the lines and the operation is processed by a digital controller. Power system analysis for solving problems with expanding. Transmission and distribution reactive power compensation for. Facts technologies allow for improved transmission system operation with minimal infrastructure investment, environmental impact, and implementation time compared to the construction of new transmission lines. The static synchronous series compensator sssc and thyristor controlled series compensation tcsc as two facts devices are considered in this paper. Tyll, sm ieee abstract in the early days of power transmission in the late 19th century problems like voltage deviation during load.
For better performance of the power system capacities by introducing compensation devices like. Study of facts devices like statcom and svc is being presented in. Using energy from renewable sources is supported by the idea of environmental conservation and because of insufficient fossil fuels. Shunt compensation facts devices are installed at the end points of transmission lines buses when used for applications, such as bus voltage regulation and improving hvdc link performance, etc. The principles of both, shunt and series reactive power compensation alternatives, are described below. Frequent occurrences of unwanted situation disturb the equilibrium so that system is almost always in transition between equilibrium or steady state conditions. Facts technology for reactive power compensation and system. Voltage stability of a system is affected by reactive power limit of the system. Var compensation near load centre has gained more importance in recent times. Wind power, as a rule, does not contribute to voltage regulation in the system. An electric power system is never in equilibrium for very long time. Research on reactive power compensation based on distribution. Whereas only a few years ago the focus was on reducing the costs of. Apr 01, 2014 conclusion from all the previous discussion we can conclude reactive power compensation is a must for improving the performance of the ac system.
Reactive power compensation is defined as the management of reactive power to improve the performance of alternatingcurrent ac power systems. Reactive power compensation for integration of wind power in. By reactive power compensation we can control the power factor and reduce the consumption of electricity. The optimallocation and parameter settingsof two types of facts devices have been investigated in this study.
Abstract voltage control and fast reactive power compensation are two main application area of static synchronous compensator statcom, which is a shunt connected voltage source converter vsc based facts controller using power semiconductor devices. Reactive power compensation in a power system is of two typesshunt and series. If suitably designed, it is capable of improving voltage quality significantly, meaning that losses in equipment and power systems are reduced, the. The statcom is shunt connected facts device used for improve voltage profile of transmission system which connected line with voltage source inverter vsi with dc link capacitor. By using facts device with controller, we can deal with variable reactive power demands. Reactive power compensation technologies accessscience from. Device like fixed capacitor thyristor controlled reactor fctcr can control variable reactive power with the use of controller. Study of facts devices like statcom and svc is being presented in this paper. It is requested to write the answers in the comment section below. Actual generation process requires the working of many components of the power system in tandem to maximize the output. Genetically tuned statcom for voltage control and reactive.
What is best facts device for reactive power compensation and. Closed loop control of thyristor switched capacitor tsc for. Real power or active power is the true power given to any load. Along with an environmental benefits, power companies and consumers will see economic benefits if reactive power compensation is implemented. Performance analysis of shunt reactive power compensators. Transmission and distribution in this article, we consider the theory of reactive power compensation, shunt and series capacitor banks and flexible ac transmission systems facts as option for optimising transmission and distribution systems. Facts device, we can do real time control of the reactive power. Pdf using a facts device as a power conditioner suitable.
Reactive power compensation in electrical networks ee. In general, the problem of reactive power compensation is related to load and voltage support. Wind power, as a rule, does not contribute to voltage regulation in. Shunt compensation is used to influence the natural electrical characteristics of the transmission line to increase the steadystate transmittable power and to. One of the main components to form a major part is the reactive power in the system. Facts devices are a powerful technology that can solve many outstanding problems in power systems. I would like to thank the readers for spending their time on this article. Introduction a distribution statcom is a shunt connected voltage source converter which has been utilized to compensate power quality problem such as unbalanced load, voltage sag, voltage fluctuation and voltage unbalance.
Major industrial loads,for example,transformers, furnaces, induction motors etcneed reactive power for sustaining magneticfield. These devices reduce the reactive current flowing on the. Importance of reactive power in power generation and. Reactive power var compensation is defined as the management of reactive power to improve the performance of ac systems. Over the years, the problems that need to be faced have changed. Shunt compensation is a direct acting method which changes. Energy storage and reactive power compensator in a large. The vsc converts the dc voltage across the storage device into a set of threephase ac output voltages.
Pdf the paper present advantages of dynamic reactive power compensation facilities instead of until now used fixed compensation, as a standard. Traditional reactive power compensation traditional reactive power compensation equipment synchronous condenser, fixed capacitors, switches, switching shunt reactors, these devices can meet a range of reactive power compensation requirements, but they also exist inherent drawbacks. From this point of view, flexible ac transmission system facts devices could be effective tools to improve power system security by reducing the power flow on overloaded lines, which in turn. The aim is to define the most viable methods for capacitive reactive power compensation, and the main focus is to examine devices for centralized compensation. These devise have allowed as to compensate reactive power and mitigate problems occurring in transmission lines. Importance of reactive power in power generation and transmission. Improving the power system performance using facts devices. The facts technology based on power electronics devices is used to enhance existing transmission capabilities in order to make the power systems network more flexible. Figure 1 shows the principles and theoretical effects of shunt reactive power compensation in a basic ac system, which comprises a source v. Reactive power compensation by appropriate means has become the most economically attractive and effective solution technically for both traditional and new problems at different voltage levels in a power system. Study of reactive power compensation using fact devices.
The comprehensive resource on reactive power compensation, presenting the design, application and operation of reactive power equipment and installations the area of reactive power compensation is gaining increasing importance worldwide. These devise have allowed as to compensate reactive power and mitigate. Facts technology for reactive power compensation and. The degree of distortion in these waveforms tends to increase according to the number of nonlinear loads in a. These changes led to acceleration in the introduction of solar power and other renewable energies, an increase in the number of the new power suppliers, and reinforcement of interconnec. New technologies for reactive power compensation in. Reactive power compensation for integration of wind power. Facts technology allows us to improve the transmission system.
The location of the shunt facts device depends on the application for which it is installed. An overview of facts devices used for reactive power. An overview of facts devices used for reactive power compensation techniques article pdf available in international journal of engineering and technical research v412 december 2015 with 808. Nov 01, 2017 it is just like asking which best mobile phone to buy. And now we shall start with the shunt compensation shunt. It accomplishes useful work like lighting lamps, rotating motors, etc. Conclusion from all the previous discussion we can conclude reactive power compensation is a must for improving the performance of the ac system. Ac power supply systems produce and consume two types of powers. However, it is seen by the system as asource of synchronous voltage. By reactive power compensation we can control the power factor and reduce the.
Devices and systems for reactive power compensation and to improve power quality have also continued to evolve. A classification of facts controller is also mentioned here. The total sum of active and reactive power is called as apparent power. Power system stability improvement using facts devices. Facts devices and previous 9 lecture actually we were discussing mostly the power electronics. Reactive power compensation technologies, state oftheart. Potentials and capabilities of facts controllers for quality. The purpose of this thesis is to inspect different options for reactive power management in carunas distribution network. Power quality and the need for compensation risha dastagir1, prof. It is just like asking which best mobile phone to buy.
At the end comparison of various facts devices are done. The first generation facts devices work like passive elements using impedance or tap changer transformers controlled by thyristors. The shuntconnected static var compensator svc using solid. The statcom is used to control the reactive power with the voltage source converter in combination with a dc voltage source.1166 1412 1214 1495 1163 706 1520 1324 632 323 138 748 403 1509 426 259 846 1166 963 667 204 545 267 480 204 277 1257 696 24 1002 682 1636 929 960 880 10 1050 800 166