Statcom is a shunt compensator able to control generated reactive power by. Distribution static compensator d statcom for the mitigation of voltage sag. Modelling and voltage control of the solarwind hybrid microgrid. For the master thesis, the work on the statcom with energy storage system should be continued, with both theoretical and practical work. So it can provide the maximum capacitive current even at low voltage values. Custom power cp concept is one of technological responses to the poor power quality presently surfacing in factories, offices and homes. The purpose of this thesis was to investigate the operational possibility of mmc statcom in weak grid conditions. The h statcom as a solution to improve the voltage profile of a power grid master thesis extended abstract. Pcs 6000 statcom is an efficient power system package specifically designed to be connected to demanding networks. It is composed of a voltage source converter vsc, and its associated with shunt connected transformer. Pdf the increasing industrialization, urbanization of life style has lead to increasing. The increased awareness in power quality issues has brought tremendous changes and improvements in power system delivery. However, any other high power semiconductor switch e.
Congestion management in transmission network utilizing statcom incorporation in transmission network is presented. Baek, modeling and dynamic analysis of statcom for shortterm voltage stability improvement using emtprv. The reactive power supplied by the statcom is given by this equation. In this thesis, supercapacitor energy storage systems scess is proposed as energy storage for statcom. Dstatcomstatcom is a managing system used on ac power indication system. Voltage vrms with dstatcom and energy storage of 50 kv. It is based on a power electronics voltagesource converter and can act as either a source or sink of reactive ac power to an electricity network. Without statcom maximum loadability of bus 2 is power 0. Application of a statcom with a novel topology to the. Apr 25, 2018 statcom or static synchronous compensator is a power electronic device using force commutated devices like igbt, gto etc. Voltage sagging or swelling and power factor are two of the major power quality issues. I certify that this thesis satisfies all the requirements as a thesis for the degree of doctor of philosophy. In addition, it is used to improve the voltage stability of a network.
The three phase reference voltages of the statcom are generated by multiplying the peak value of the grid voltage and modulation index. Statcom has no long term energy support on the dc side and it cannot exchange real power with the ac system. Each link incorporates four 45 kv gtos with 3ka turnoff capabilityand dc capacitoy acting as its voltage source. A matlab simulation model to improve voltage sag due to. Among flexible ac transmission system facts controllers, the statcom has shown feasibility in terms of costeffectiveness in a wide range of problemsolving abilities from transmission to. In the transmission systems, statcoms primarily handle only fundamental reactive power. Power flow study and analysis using statcom written by agashe neha m. This statcom configuration is referred to as a chain link statcom cls. This dissertation is dedicated to a comprehensive study of static synchronous compensator statcom systems utilizing cascadedmultilevel converters cmcs. Statcom as a solution to improve the voltage profile of a power grid yasin ahmad thesis to obtain the master of science degree in electrical and computer engineering supervisor. Simulation results of voltage swell in this case, d statcom is not connected and a capacitive load is applied at a pcc.
Pdf download for static synchronous compensator statcom for dynamic. The study focuses on a fundamental grid operation requirement to maintain a voltage at the point of common coupling by regulating the voltage. The 6 pulses for the switching devices of the statcom are generated by using pwm technique. Application of a statcom with a novel topology to the power sub grid. Design, analysis and experimental evaluation of a virtual. Mar 01, 2020 static synchronous compensation statcom is considered as one of the famous modules of the flexible ac transmission systems facts devices. In this thesis, a gto is used as a switch for the cls. An adaptive d statcom control scheme utilising impedance estimation christopher james rose, beng. Xing, a comparison of pole assignment and lqr design methods for multivariable control for statcom, thesis, the florida state university 2003 17. In this thesis, it is tried to show the application of statcom to a bus system and its effect on the voltage and angle of the buses.
Evaluation of the reactive power support capability and. By introducing a static synchronous compensator statcom into a system these powerquality issues can be significantly reduced and maintained effectively. Electrical power quality is essential in the effective transmission and distribution of power to consumers. Study of reactive power compensation using statcom request pdf. Recommended citation montazeri, miad mohaghegh, improved low voltage ride through capability of wind farm using statcom 2011. This thesis investigates the use of a static synchronous compensator statcom along with wind farms for the purpose of stabilizing the grid voltage after gridside disturbances such as a three phase short circuit fault, temporary trip of a wind. Designing of supplementary controller for statcom for. Statcom scess, and thereby is inacurate regarding the amount power fedtofromthesupercapacitorbank.
Statcom and energy storage in grid integration of wind farms. This thesis describes the configuration, design and control of the 12pulse dstatcom. This thesis investigates the use of static synchronous compensator statcom on wind farms for the purpose of stabilizing the grid voltage after a disturbance. The d statcom can deliver a capacitive or inductive current independent of the network voltage.
Enhancement of power system dynamics through statcom. Transmission congestion management problem is studied from different aspects, i. Development of a low voltage static synchronous compensator. A static synchronous compensator statcom, also known as a static synchronous condenser statcon, is a regulating device used on alternating current electricity transmission networks. In a single device, merus statcom combines dynamic reactive power compensation and active harmonic filtering functionalities, which can solve variety. Scribd is the worlds largest social reading and publishing site. Statcom as a solution to improve the voltage profile of a. In addition, a small statcom model was realised in the laboratory. Design, analysis and implementation of a small signal control. This chapter introduces the main topic of the thesis. Improved low voltage ride through capability of wind farm. The study of shunt connected facts devices is a connected field with the problem of reactive power compensation and better mitigation of transmission related problems in todays world.
The benefits and effectiveness of the proposed algorithms are given in the simulation and experimental results. The theoretical bene ts of the proposed converter are supported by di erent simulations carried out in matlabsimulink. Application of statcom for improved dynamic performance. Adaptive static synchronous compensation techniques with. This thesis reports the results of timedomain simulation studies that are carried out to investigate. It is committed to bring out the highest excellence by publishing unique, novel research articles of upcoming authors as well as renowned scholars. In this thesis, design and implementation of a distributiontype, voltage source converter vsc based static synchronous compensator d statcom having the. For best location of statcm also consider economics. Frequency control for microgrids using enhanced statcom. Statcom model based on the operating principle of the statcom, the equivalent circuit can be derived, which is given in fig. This project developed and tested the idea of constructing a low voltage static synchronous compensator for educational use, in which students could safely experiment with the concept and. Next the graphs depicting the implemented statcom bus are analyzed and it is shown that the plots of the rotor angles show a changed characteristic under the influence of the statcom. Sonia maria nunes dos santos paulo ferreira pinto examination committee chairperson. Download preface 1 pdf 50 kb download sample pages 2 pdf 1.
Application of statcom for improved dynamic performance of. The results from the practical work showed the same general patterns as the simulations. The transformer is used as a link between the vsc and the. Download file pdf load flow analysis using matlab thesis system analysis and design. Pdf optimal placement of statcom for voltage stability. Measurement spm units is available, then the remote signals can be downloaded at the. Statcom supplies reactive power and when the q is negative, the statcom absorbs reactive power from the system. Publication of some or all of the contents of the thesis or other scientific forums. It is important to model facts devices accurately to avoid misleading results.
Various circuit topologies and control techniques have been developed aimed at mitigating power quality disturbances. Congestion management of transmission network using statcom major field. Statcom static synchronous compensator or known as asvg advanced static var generator is a solidstate voltage source inverter that is coupled with a transformer and connected to a transmission line. Frequency control for microgrids using enhanced statcom and. Ismet erkmen head of department this is to certify that we have read this thesis and that in our opinion it is fully adequate, in scope and quality, as a thesis for the degree of doctor of philosophy. Flexible alternating current transmission systems are new devices emanatin. Model a statcom using a cascade multilevel converter cmc with a star configuration, is designed in this paper. Each vsc is a 1phase, fullbridge converter and forms a link of a chain. A statcom is usually installed in the electric networks with poor power factor or poor voltage regulation to improve these problems. In this thesis statcom is used for reactive power compensation on electric transmission line. Effect of statcom location on distance protection relay operation. With the increase in nonlinear loads it is becoming more prevalent to maintain the quality of power supplied. Voltage quality improvement using statcom in grid connected. Moreover, the d statcom can temporarily increase the nominal current inductive or capacitive.
Static synchronous compensator statcom can be adopted for reactive. Load flow by gaussseidel method statcom model for load flow is. Investigating low voltage ride through capability on wind. By introducing a static synchronous compensator statcom into a system these powerquality. Static compensators statcoms in power systems farhad. This thesis was conducted at tampere university hervanta campus. Apr 26, 20 key words d statcom methodology results and causes conclusion 6. To overcome the misoperation of the distance relay when the transmission line is shunt compensated with statcom, studies on some communicationaided protection schemes, including putt, pott and dcb, are conducted. Modeling of 18pulse statcom for power system applications. When v cv s, the statcom is considered to be operating in a capacitive mode and when vc statcom is said to be operating in floating mode. The modeling and control of a cascadedmultilevel converter. The thesis describes the novel algorithms for frequency control using an intelligent static compensator statcom and supercapacitor energy storage system scess. The main objective of this paper is to study the statcom theoretically.
Thesis submitted to the university of nottingham for the degree of doctor of philosophy september 2015. A statcom simulink model provided by abb has been modi ed to satisfy the new topology. In this thesis, an optimal linear quadratic regulator lqr design is a compared to the pole. Sensarma, analysis and development of a distribution statcom for power quality compensation.
Emtprv simulation of a chain link statcom spectrum. The layout and operation of the new converter have been analysed in this thesis. Enhancement of power quality in distribution system using d. Designing of supplementary controller for statcom for damping. A static synchronous compensator statcom is also known as an. Recently, full mimo state feedback by pole assignment has been shown to be an improvement over classical pi control. Study of reactive power compensation using statcom. To verify the accuracy of the proposed models and the performance of the control system for the cmcbased statcom, a lowpower, sevenlevel cascadedbased statcom hardware prototype is implemented. Bachelors degree s1 thesis, sekolah tinggi teknik pln. The flexibility of the system allows it to be applied to a wide range of applications such as dynamic voltage stabilization, voltage balancing of asymmetrical loads, mitigating voltage flicker created by electric arc furnaces, and active harmonic filtering. Modeling of statcom and svc for power steady state operation and enhancement of transient stability of a multi a thesis submitted in partial fulfillment of the requirements for the degree of master of technology prof. In this master thesis, statcom and hybrid statcom models are proposed and.
This paper discusses the optimum voltage control technique using the statcom module with the transmission system to overcome the drop and the influence factors for the voltage in the power system. Design, analysis and experimental evaluation of a virtual synchronous machine based control scheme for statcom applications chi li thesis submitted to the faculty of the virginia polytechnic institute and state university in. Since a micro grid can be a subsystem of the power grid, it is called power sub grid through out this thesis. The system as well as the statcom is assumed three phase balanced the statcom can be equivalently represented by.
Leonardo journal of sciences issn 15830233 issue 25, julydecember 2014 p. Modular multilevel cascaded flying capacitor statcom for. Effect of statcom location on distance protection relay. Department of electrical engineering national institute of technology, rourkelamachine power system by statcom in. Results statcom is incorporated at various locations of ieee bus systems and then the system is subjected to load flow study by newton raphson method to check its effect on statcom injected power source impedance is taken as 0. A control method for voltage source control vscbased statcom that. Its simulation works are done by using pscademtdc version 4. Its ability to support the supply voltage is better than the svc. Weak grid is a power system which has low short circuit capacity, high equivalent grid impedance, high dvdq sensitivity and higher volatility to voltage instability. Static synchronous compensator statcom for dynamic reactive. Enhancement of power quality in distribution system using. Preface whileworkingonthismasterthesis, ihavelearnedalot.
Design and simulation studies of dstatcom for mitigating. Load flow analysis plays a vital role in designing of new networks or for extending the previous oneshere in athis p per analysis h as been c rried out using matlab. Reactive power generation was achieved by charging and discharging the energy storage capacitor 8. Development of dstatcom for voltage sag mitigation. Congestion management of transmission network using statcom. This thesis focuses on control of shunt active power conditioner used for power.
Modelling and simulation of statcom for reactive power and. Merus statcom can guarantee the stability of a power system with response time less than a millisecond. Statcom is a multiple input and multiple output system mimo, which can be presented by a mathematic model. Rose, christopher james 2016 an adaptive d statcom control. Windari, farida and hafidz, mohammad and erlina, erlina 2018 perbaikan stabilitas transien pada sistem transmisi dengan statcom menggunakan simulink matlab. The proposed system takes into consideration the coordinated design of generator. The objective of this thesis is to design and analyze a system consisting of a statcom and a supercapacitor to improve power system dynamic stability. By introducing a static synchronous compensator statcom into a system these power. Study, analysis and simulation of a static compensator d.
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