The obtained results show that statcom is very efficient and effective for the flicker compensation. The pcs100 statcom advanced control also allows it to damp voltage disturbances in the electricity network. During the transientconditions the d statcom provides leading or lagging reactive power to. Comparative study for eafs reactive energy compensation methods and power factor improvement deaconu sorin ioan1. The statcom is composed of a voltagesource inverter with a dc capacitor, coupling transformer, and signal generation and control circuit.
A twobus system is exploited to fulfill the investigation of the presented procedure. Each module can deliver 125 kvar reactive power at nominal voltage of 480v. Distribution static compensator is based on the vsc principle. Due to the latest achievements in the semiconductors industry and consequently the emergence.
Reactive power management and voltage control by using statcom 1. In table 1 values of flicker short term of the electro arc. Based equipment for flicker mitigation in his paper. Mitigation of flicker and voltage fluctuations sunday, september 18, 2011. Reactive power compensation and voltage support in wind farms. Notice also that, the active filters are used for the voltage flickers mitigation as well. Study of a statcom application for voltage stability evaluated by dynamic pv curves and time simulations hiroshi yonezawa michiharu tsukada john j. A statcom offers better dynamic performance than a svc, in particular a faster response time as well as the ability to. Varpro statcom static synchronous compensator statcom. Development of a 20mva statcom for flicker suppression. Sharaf, voltage stabilization and reactive compensation using a novel facts statcom scheme. Effective mitigation of voltage flicker in power system using 12pulse converter based statcom. First, the voltage flicker compensation is adopted using fctcr.
It has been observed that the statcom ratings are only 20 mva with controllers and 200 mva without controllers. Pcs100 statcom technical catalogue 2ucd180000e002 rev. It consist coupling transformer, a voltage source inverter and dc capacitor. Voltage flickering reduction using distribution statcom. Voltage flicker compensation using statcom figure 5. Voltage stability improvement and reactive power compensation. Based around a low voltage converter platform, varpro statcom provides a wide bandwidth performance with a flexible and highly reliable modular redundant power electronic configuration, correcting power factor, flicker and other disturbances for renewable generation such as wind, solar and traditional industrial applications. Effective mitigation of voltage flicker in power system using. Pdf modelling and simulation of statcom device for voltage. Sensor less speed estimation of induction motor in a direct torque control system set744. Circuit diagram of the 12pulse voltage source 54 statcom configuration sdes eee. Statcom is a device, which use to generate or absorb reactive power.
For voltage flicker applications, the d statcom technology provides rapidresponse compensation to correct for the voltage. Flicker mitigation studies using an ideally optimal control algorithm for the statcom have been performed. With the statcom in operation, a flicker reduction factor 5 is achieved. Voltage flicker compensation using statcom ieee conference. Statcom bess device is based on concepts of instantaneous power on the synchronousrotating dq reference frame schauder and mehta, 1993. Minimization of power loss in distribution system using svc. The obtained results clearly confirmed the efficiency of the 12pulse statcom to complete the voltage flicker compensation and reduces the thd levels. Speed control of dc motor using combined armature and field control set741. Find, read and cite all the research you need on researchgate. A statcom using a cascade multilevel converter cmc with a star configuration, is designed in this paper. Request pdf voltage flicker compensation using statcom voltage flicker is considered as one of the most severe power quality problems especially in. Various compensation functions the statcom system provides variety.
An hbridge static synchronous compensator statcom is developed using a star configured cascaded multilevel converter cmc. The instantaneous power theory presented in 6 is used. The statcom is composed of a voltage source inverter with a dc capacitor, coupling transformer, and signal generation and control circuit. Negativephase sequence voltage compensation as part of the flicker compensation. Voltage flicker compensation using statcom ac power. The harmonic spectrum of the mitigated output voltage of a 6pulse converter based statcom. The voltage source inverter for the transmission statcom operates in multibridge mode to reduce the harmonic level of the output current 9. Statcom, active power compensation, power quality, flicker, industrial plant.
The svg statcom will respond in 5ms or less, which offers arc furnaces with fast reactive power support. Modulated pwm static compensator statcom, comprising a voltage source converter in combination with a passive filter bank, will be used for compensation of reactive power and for flicker mitigation. Statcom 2122 for voltage flicker compensation to overcome the aforementioned problems related to other techniques. Statcom as a solution to improve the voltage profile of a. Power quality improvements in low voltage distribution networks containing distributed energy resources sumit mazumder ami bsc. Voltage flicker is considered as one of the most severe power quality problems especially in loads like electrical arc furnaces and much attention has be. Pdf voltage flickering reduction using distribution statcom. Multipulse voltage source converter statcom for voltage. Sep 26, 2011 statcom or static synchronous compensator is a shunt device, which uses forcecommutated power electronics i. In the paper, an arc furnace installation with a statcom is modeled dynamically both as a digital computer model in the program emtdc as well as in a lowpower analog realtime model. The ideal compensation requires the mains current to. Design, analysis and simulation of linear controller of a. University of turkish aeronautical association faculty of engineering eee department supervision prof. Pcs100 statcom dynamic reactive power compensation technical.
Statcom or static synchronous compensator is a shunt device, which uses forcecommutated power. It is also a member of the socalled flexible ac transmission system facts devices. Voltage flicker mitigation using pwmbased distribution statcom. Experimental results of upstream voltage before and after d statcom is connected. Pdf voltage flicker mitigation using statcom and ess. Statcom or static synchronous compensator is a shunt device, which uses forcecommutated power electronics i. Pcs100 statcom dynamic reactive power compensation technical catalogue introduction based around a low voltage converter platform, the pcs100. Power system stability enhancement under three phase fault. Analysis and simulation of a dstatcom for voltage quality. Design and simulation studies of dstatcom for voltage sag, swell mitigation international journal of power system operation and energy management issn print. Voltage flicker is considered as one of the most severe power quality problems especially in loads like electrical arc furnaces and much attention has been paid to it lately.
The voltage flicker compensation by 8 pulse as well as 12 pulse static synchronous compensator statcom has been performed. During normal grid conditions, or at an end users site, the pcs100 statcom can provide correction for voltage flicker, poor power factor and harmonic currents. Design of statcom for power system stability improvement. In proceedings of the ieee power engineering society transmission and distribution conference summer ed. Mitigation of voltage flicker and reduction in thd by. Design, analysis and simulation of linear controller of a statcom for reactive power compensation on variation of dc link voltage by the application of statcom to linear and nonlinear loads 1gindam gangasagara, 2k. The compensation of voltage flickering for the static synchronous. Voltage and current at load side after compensation using statcom reactive power demand, so that the voltage sag occurred fig 9. The svg has phase compensation and can eliminate 3ph unbalance caused. The voltage sag is mitigated with energy storage of 50 kv. Consequences of the issues the voltage variation, flicker, harmonics causes the malfunction of equipment namely microprocessor based control system, programmable logic controller plc, adjustable speed drives, flickering of light. Statcom provides shunt compensation in a similar way as svc but utilizes a voltage source converter rather shunt capacitors and reactors machowski, 1997. Mitigation of voltage flickers using shunt facts device.
Power system stability enhancement under three phase fault with facts devices tcsc, statcom and upfc. The obtained results show that 12pulse converter based statcom is very efficient and effective for the mitigation of voltage flickering and thd reduction. Reactive power management and voltage control by using statcom. This paper deals with voltage flicker compensation by means of statcom. Comparative study for eafs reactive energy compensation. Gto, igbt to control power flow and improve transient stability on electrical power networks. In this case, injection of harmonics into the system caused some problems which were later overcome by using 12pulse assignment of satcom and rlc filter three phase harmonic filter. The power electronic based three phase reactive power compensation. The technique is to use statcom 8 along with a harmonic filter for voltage flicker compensation as well as harmonic distortion to overcome the aforementioned problems related to other techniques. In this chapter the conventional methods employed for reactive.
A voltage source converter is a power electronic device, which can generate a sinusoidal voltage of desired magnitude, frequency and phase angle. Tech matlab ieee projects list 20 sooxma technologies. The concept of instantaneous reactive power components is used in the controlling system. Dimmers can exacerbate the flicker problem because flicker becomes more perceptible as baseline lumen levels are reduced. In this chapter the conventional methods employed for reactive power compensation, their relative merits and demerits, desirable features of an advanced compensator in a distribution system are highlighted. Fixed capacitor thyristor controlled reactor, was simulated. Upfc the upfc is the most versatile facts controller developed so far, with all encompassing capabilities of voltage regulation, series compensation, and phase shifting.
Flicker mitigation with a statcom in an electric arc. A case study is provided for an industrial plant with 60 mva electric arc furnace producing power disturbances, namely flicker. Design of vsi based statcom for eliminating harmonic. Its performance regarding flicker mitigation will be compared with that of an svc. The voltage flicker compensation by 6 pulse as well as 12pulse static synchronous compensator statcom has been performed. Svg statcoms significantly reduce the voltage flicker and stabilize the line voltage which leads to increased metallurgy power output and productivity.
Svc plus is presently the fastest dynamic solution for voltage regulation by enhancing a statcom static synchronous compensator with modular multilevel converter mmc technology developed by siemens. In the programmable voltage source block menu, change the time variation of parameter to none. Voltage flicker compensation using statcom free download as pdf file. The circuit diagram of a 6pulse voltage source 52 converter statcom figure 6. Then a 6pulse voltage source converter statcom is used and finally for a complete voltage flicker mitigation a 12pulse voltage source converter statcom is designed. Voltage source converters are widely used in adjustablespeed drives, but can also be used to mitigate power quality problems.
Statcom, an efficient means for flicker mitigation ieee. The basic principle of operation of a statcom is the generation of a controllable ac voltage source behind a. Mitigation of harmonics in voltage flicker compensation. The concept of instantaneous reactive power components is used in the controlling system a twobus. Although there is no legal restriction on flicker, electrical cooperative research1 defined. Pcs100 statcom dynamic reactive power compensation. The operation of an electric arc furnace in a russian steel plant was creating power quality issues such as flicker and voltage variations.
Voltage flicker compensation using statcom request pdf. Sumanth 1pg scholar, department of eee, snist, hyderabad, telangana, india. Issn 17554535 voltage and current unbalance compensation. A d statcom injects a current into the system to correct the voltage sag, swell. Fluorescent lamps typically flicker less for a given voltage input 2.
Mitigation of flicker and voltage fluctuations power. Voltage flicker is a major power quality problem as. Voltage and current unbalance compensation using a static var compensator. The statcom is based on high frequency switching voltage source converter vsc. Simulation of reactive power compensation using statcom. So, statcom with poc controllers are more effective to enhance the voltage stability and increases power transmission capacity of a power system. Statcom static synchronous compensator power quality in. The compensation techniques and their results are presented in this section. Mitigation of power quality problems using facts devices. Development of a 20mva statcom for flicker suppression 6 voltage fluctuations that are transmitted to the other general utility users.
Paserba senior member toshiaki shimato katsuhiko matsuno gregory f. Voltage flicker analysis and its mitigation by statcom for power. Statcom or static synchronous compensator is a power electronic device using force commutated devices like igbt, gto etc. The technique is to use statcom 14 for voltage flicker compensation to overcome the aforementioned problems related to other techniques. This paper presents a model for d statcom for voltage flicker mitigation.
Initially a 6pulse voltage source converter statcom is used to compensate for the. For this purpose a twobus system connected with statcom is used. The installing of the statcom at the steel plant feeder has brought benefits not only to the steel plant, but also to the grid owner. In the algorithm, fluctuations in imaginary and real current are considered as well as fluctuations in the real current time derivative. Mitigation echniques using facts devices the dynamic voltage restorer dvr has become popular as a cost effective solution.
In this paper, voltage flicker mitigation statcom of eaf with statcom. Although, this reactive power injection, the statcom can regulate the voltage at the connection node. Distribution static compensator dstatcom is proposed for compensation of reactive power and unbalance caused by various loads sensitive and nonlinear loads in distribution system. The obtained results show that statcom is very efficient and effective for the compensation and mitigation of voltage flicker and harmonics all the simulation has. Sharaf, voltage stabilization and reactive compensation using a novel facts statcom scheme 6 s. Compensatig system in this project a two bus system is considered to investigate the voltage flicker compensation using statcom. Statcom success story steel industry grid code compliance by mitigating flicker and voltage drop with statcom in an electric arc furnace. Mitigation of harmonics in voltage flicker compensation using. For voltage flicker applications, the d statcom technology provides rapidresponse compensation to correct for the voltage fluctuation characteristics imposed on the interconnected. Voltage flicker mitigation using statcom and ess request pdf. In this paper, voltage flicker mitigation of eaf with statcom along with energy storage system ess is presented and performance results of the system using the pscademtdc software are analyzed. Reactive power compensation and voltage support in wind farms using pv statcom case study at adamai wind farm, ethiopia.
One single pcs100 statcom can have up to 32 modules. Study of a statcom application for voltage stability. Initially, the voltage flicker mitigation, using fctcr fixed capacitor thyristor controlled reactor, was simulated. Active and reactive power at load side from the above figures, i came to know that the drop of voltage in transmission line during the transition time i. Transmitted power versus transmission angle 50 characteristic of a statcom figure 6. Voltage flicker is a power quality problem caused by large rapid industrial load changes. Voltage flicker mitigation using pwmbased distribution. In the statcom principle, the source v 1 is the power system voltage at the bus where the statcom is connected, v. It provides grid operators with reactive power compensation and improved range of operational voltage with a faster response time and a smaller footprint than traditional static var compensator svc solutions. The statcom generates a balanced 3phase voltage whose magnitude and phase can be adjusted rapidly by using semiconductor switches.
Design and simulation studies of d statcom for voltage sag, swell mitigation international journal of power system operation and energy management issn print. In authors have analyzed about the static shunt compensation for voltage flicker reduction and power factor correction using statcom. Design and implementation of a shunt active power filter with reduced dc link voltage. All the simulations have been performed using matlab software. Sensitive loads voltage improvement using dynamic voltage restorer set743.
Mitigation of harmonics in voltage flicker compensation using statcom 279 to the system in the next stage. This paper has dealed with performance analysis of d statcom that is used for voltage flicker control. The most commonly used methods for compensation of voltage flicker is by regulating the electric. Contents introduction definition of reactive power. Compensation of voltage flicker by using statcom and. It reduces voltage flicker and damp out transient oscillations. Engineering in electrical and electronics engineering submitted in partial fulfilment of the requirements for the degree of. Wide operating range the statcom system can operate independently of system voltage in the range between rated capacitive and inductive reactive power. Flicker compensation devices such as dynamic voltage stabilizers andor synchronous machines are installed at the point of common coupling pcc to meet this objective. Thd reduction and voltage flicker mitigation in power system. During normal grid conditions, or at an end users site, the pcs100 statcom can provide correction for voltage flicker, poor power. On this basis also excellent performance in industrial applications calling for high flicker reduction was also achieved. During this test, voltage of the programmable voltage source will be kept constant and you will enable modulation of the variable load so that you can observe how the d statcom can mitigate voltage flicker. Ges utility grade static synchronous compensator statcom solution is a custom designed system to be installed on transmission grids.