An overview of the power quality technologies available and some guidelines for choosing between them presentation of abbs pcs 6000 statcom voltage stabilisation examples in different industrial applications. Synchronous condenser, static var compensator svc and static synchronous compensator statcom. This paper will discuss and demonstrate how facts controllers shunt static synchronous compensator statcom and static var compensator svc have successfully been applied to power system for effective regulating system voltage. The investment cost for the used d statcom is given in table 4 purewave, 2008. In principle, however, the operating costs may differ from year to year. They are easy to integrate into both new and existing grid structures, and can help improve grid reliability and avoid significant upgrade costs for grid connections. The timedomain simulation results for these two cases are shown in the comparison plots in figures 5 to 9, where the dashed line is the base case and the solid line is the system with statcom. Statcom is one of the most important shunt facts controllers, which is designed to support the voltage and improve stability of the power system. Mortazavi3 abstract the main objective of this paper is a comparative investigate in enhancement of damping power system oscillation via. Review on comparison of facts controllers for power system. Difference between svc and statcom may be noted that in the normal linear operating range of the vi characteristic and functional compensation capability of the statcom and the svc are similar. A svcstatcom of 20 mva is connected on the common point of connection. Statcom the voltagesourced converter vsc is the basic electronic part of a statcom, which converts the dc voltage into a threephase set of output voltages with desired amplitude.
The performances comparison between svc and statcom controller for compensating the reactive power by using the control technique i. However, at voltages lower than the normal voltage regulation range, the statcom can generate more reactive power than the svc. Comparison of svc and statcom in static voltage stability. Simulink results run the simulation and look at results.
The main difference between a statcom and an svc is the way they operate. The energy storage device is a relatively small dc capacitor, and hence the statcom is capable of only reactive power. The amount of reactive power is given by the following equation 15. The best of both combining statcom with conventional. This paper shows a comparison between synchronous condenser sc and statcom in terms of inertia frequency response ifr with synchronous generator sg. The statcom also provides better reactive powersupport at low ac voltages than an svc, since the reactive power from a statcom decreaseslinearly with the ac voltage as the current can be maintained at the rated value even down tolow ac voltage. Comparison of the operational theory and features of svc.
A comparison with svc and statcom is also simultaneously presented. The statcom is one of the mostused facts devices 2 for many applications. A svc statcom of 20 mva is connected on the common point of connection. This paper presents a comparison of the operational theory and features of static var compensator svc and static synchronous compensator statcom in power system networks. For this outage, the steadystate load level at bus n4 and bus n5 is as shown in table 2. A static synchronous compensator statcom, also known as a static synchronous condenser statcon, is a regulating device used on alternating current electricity transmission networks. However, the basic operating principles of the statcom, which, with a converter based var generator, functions as a. Comparison of upfc, tcsc and svc for improving voltage stability. In this paper comparison is also performed between svc and statcom under fault condition and it is show that statcom have. Comparison of synchronous condenser and statcom for inertial. One of the many devices under the facts family, a statcom is a regulating device which can be used to reg ulate the flow of reactive power in the system independent of other system parameters. This allows statcom to delivers constant reactive power at the limits compared to svc. Pdf comparison of shunt capacitor, svc and statcom in.
On this basis also excellent performance in industrial applications calling for high flicker reduction was also achieved. This characteristics make statcom more robust and effective than svc in providing voltage support and stability improvement. 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. Statcom size wouldbe much smaller and should be themore cost effective of both. Mar 14, 20 the statcom also provides better reactive powersupport at low ac voltages than an svc, since the reactive power from a statcom decreaseslinearly with the ac voltage as the current can be maintained at the rated value even down tolow ac voltage. Its performance regarding flicker mitigation will be compared with that of an svc. A functional model of a statcom is shown in figure 2. Statcom based on vsc topology utilize either gto or igbt devices.
Comparison of shunt capacitor, svc and statcom in static voltage stability margin enhancement article pdf available in international journal of electrical engineering education 412 april. Pdf comparison of shunt capacitor, svc and statcom in static. Pdf dynamic performance comparison between statcom and. Reactive power comparison between svc and statcom, xaxis represents timesec, yaxis represents reactive powerpu. 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. Pdf comparison of the operational theory and features of. Pdf dynamic performance comparison between statcom and svc.
The purpose of the research has been to develop digital controllers for the cascadedmultilevelconverter based statcom systems. Cost estimation for reactive power compensation in. Comparison of synchronous condenser and statcom for. Static synchronous compensators an overview sciencedirect. Statcom statcom is the voltagesource inverter vsi, which converts a dc input voltage into ac output voltage in order to compensate the active and reactive power needed by the system 10. In this case the reactive power output of a thyristor based svc will decrease with the square of the connected voltage. These technologies were defined, critically examined and compared, the most promising technology is recommended for the realization of an effective, efficient, sustainable, qualitative and reliable electrical power network.
Simulation results have demonstrated the indisputable contribution of upfc in comparison of upfc, tcsc and svc for improving voltage stability a. Furthermore, the performance of the statcom is compared with that of conventional static var compensator svc. Improving the system reactive power handling capacity via flexible ac transmission system facts devices is a remedy for prevention of voltage instability. Exploring power electronics simulation and chil testing with the rtds simulator duration. This paper presents an investigation to the dynamic performance of a pitype controlled statcom for various faulty conditions as well as for different system short circuit ratios scr. Pdf this paper compares the shunt capacitor, svc and statcom in static. The task for the installed svc is to provide capacitive current to support the network voltage. In this paper a statcom and svc are used to regulate voltage in a power system. Figures 3 and 4 show the basic structure and typical steady state vi characteristic of statcom, respectively. Comparison of synchronous condenser and statcom for inertial response support yang liu, shuitao yang, shao zhang and fang zheng peng electrical and computer engineering department, michigan state university, east lansing, usa, email protected abstractthis paper shows a comparison between synchronous condenser sc and statcom in terms of inertia frequency response ifr with synchronous. Here you can ask questions related to electrical engineering, electronics enginee. 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 svc solutions.
Series facts device connected between bus 2 and 3 in a single circuit long transmission line as shown in fig. Comparative analysis of statcom and svc for reactive. Power quality voltage stabilisation for industrial grids and wind farms with statcom michael neutz, mv power converters, abb switzerland ltd jornadas tecnicasabb en chile 20. Benefits of svc and statcom for electric utility application s. An understanding of the voltage stabilisation principle. Ges utility grade static synchronous compensator statcom solution is a custom designed system to be installed on transmission grids. Ckqfixed q c 4 where cfixed is the fixed cost baht qc is the size of the reactive power of dstatcom to be installed kvar kq is the per unit cost of the reactive power baht kvar in addition, the operating cost can be described as follows chung and shaoyun, 1997.
Performance comparison between svc and statcom for reactive. Michael neutz, mv power converters, abb switzerland ltd. In its simplest form, the statcom is made up of a coupling transformer, a vsc, and a dc energy storage device. Comparison between upfc, svc, tcsc, and sssc for power system stability enhancement table 2 shows the comparison of facts devices of twoarea power system with series and shunt facts devices. Electric arc furnace eaf is one of the largest loads in electric power systems. Statcom controller a static synchronous compensator statcom, also. 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. Voltage stability margin augmentation with the application of svc and statcom is compared with the system having no. This is illustrated in two following figures, and table 3. It has long been argued that, as a rotatingmassbased reactive power compensation device, sc will contribute to the total inertia of the network from its stored kinetic energy. Voltage stability improvement using statcom and svc. Compared with an svc, a statcom offers the possibility of feeding the grid with the maximum available reactive current even at low voltage. One of the major reasons for installing a statcom or svc is to improve dynamic voltage control and thus increase system load ability.
Furthermore, the performance of the statcom is compared with that. Damping power system oscillations improvement by facts devices. Comparison of upfc, tcsc and svc for improving voltage. Comparison of the operational theory and features of svc and. Other compensators a static var compensator svc can also be used for voltage stability. When system voltage is high they absorb reactive power inductive. These operating costs consist of heating losses and maintenance costs etc. When system voltage is low they generate reactive power capacitive. Comparison of different fact devices ijste journal. Figure 14 a comparisons between voltage level without control, with svc, and with statcom at load level 4.
Statcom systems objectives the aim of this presentation is to give. Poster 2015, prague may 14 1 comparison of the operational theory and features of svc and statcom arun singh sengar1, raunak chhajer2, ghaeth fandi3, famous o. Table 4 example cost for the d statcom device device initial cost baht kvar annual cost %. The improvement of transient stability of a twoarea multimachine power system, using svc static var compensator statcom static.
Benefits of svc and statcom for electric utility application. Damping power system oscillations improvement by facts. Comparison of svc and statcom instaticvoltagestabilitymarginenhancement 2. The original swing curve of the machine without any facts device is also shown in the figure. Singleline diagram of the studied power system with svc the following equation yields the node voltage. Comparison between statcom and tcsc on static voltage. Result displays the measured reactive power q m generated by the svc magenta trace and the statcom.
One of the many devices under the facts family, a statcom is a regulating device which can be used to regulate the flow of reactive power in the system independent of other system parameters. Improving the system reactive power handling capacity via flexible ac transmission system facts devices is a remedy for. Comparison of synchronous condenser and statcom for inertial response support yang liu, shuitao yang, shao zhang and fang zheng peng electrical and computer engineering department, michigan state university, east lansing, usa, email protected abstractthis paper shows a comparison between synchronous condenser sc and statcom in terms of inertia frequency response ifr with. A comparison between svc and statcom in flicker mitigation of.
Review on comparison of facts controllers for power. On the reverse, if i is higher than i q is flowing from i to v1 statcom is generating reactive power. If connected to a source of power it can also provide active ac. 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. Implement phasor model of threephase static synchronous. It provides grid operators with reactive power compensation and improved range of operational voltage with a faster response time. It compares the voltage regulation, system stability, economical and. In this paper comparison is also performed between svc and statcom under fault condition and it is show that statcom have the ability to provide more capacitive power during a fault over svc. Shilaja school of electrical engineering vit university vellore,india abstract. Statcom has no long term energy support on the dc side and it. Dynamic performance comparison between statcom and svc.
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