In three phase applications, the units are typically connected in delta. The statcom technology is used to regulate voltage by providing reactive power to the grid in either capacitive or inductive var sourcing. This paper presents a study of the dynamic performance analysis of an advanced static var compensator asvc using a threelevel voltage source inverter. Abb and iec has been obscured or removed to protect from disclosure of intellectual property of. The design and performance of static var compensators for particle accelerators. Application of static var compensator in entergy system to. The model is based on representing the controller as variable impedance that changes with the firing angle of the tcr. Varpro statcom static synchronous compensator statcom. Static var compensator static var compensators svcs are systems, or a set of devices, that create voltage stability in high voltage electrical systems. The functional structure for svc built with a thyristor controlled reactor tcr and its model are described. The silcovar c staticvar compensator svc is designed to decrease disturbances caused by changes in voltage fluctuations in the normal operation of transmission lines and industrial distribution systems. Shunt compensation for improvement of voltage stability. A static var compensator svc is a set of electrical devices for providing fastacting reactive power on highvoltage electricity transmission networks.
Dan sullivan, jan paramalingam, mitsubishi electric power product inc. Svcs are often modeled as a conventional pv generator bus with reactive power limits. A general and simple model f o r the overall system is obtained using circuit dqtransform and dc and ac analyses are achieved to characterize the openloop system. The term static is used to indicate that svcs, unlike synchronous compensators have no moving or rotating main components. Svcs are part of the flexible ac transmission system device family, regulating voltage, power factor, harmonics and stabilizing the system. Static var compensator silcovar c nidec industrial solutions. The current of aircore reactors can be controlled by adjusting the fire angle of thyristors.
Vector analysis and control of advanced static var. System under study a power generation station along with an svc connected to infinite bus. The benefits of reactive power compensation, more constant voltage levels and reduced distortion levels are transferred to the end user as production increases, total power losses are reduced, and reactive power penalties are avoided. Sep 21, 2005 raleigh, nc september 21, 2005 abb, the leading power and automation technology group, today said it has won a contract to supply three static var compensators svcs for american electric power aep in texas to help control and stabilize voltage in areas of high load growth and wind generation. The static var compensator svc is designed to decrease disturbances caused by changes in reactive power and voltage fluctuations in the normal operation of transmission lines and industry distribution systems. Static var compensator silcovar c nidec industrial. Design of static var compensator for power systems subject. Static var compensator a static var compensator is a parallel combination of controlled reactor and fixed shunt capacitor shown in the figure below. A simple and direct method of determining the steady state voltage stability limit of a power system after the placement of static var compensator svc is presented in reference 17. Michael neutz, mv power converters, abb switzerland ltd jornadas tecnicas abb en chile technology overview svc, sc.
Increased efficiency in power systems the svc is a solidstate reactive power compensation device based on high power thyristor technology. Zurich, switzerland, july 25, 2011 abb, the leading power and automation technology group, has successfully commissioned the worlds largest svc light static var compensator installation in santiago, working in close collaboration with transelec, chiles leading power transmission utility. Static var compensator a static var compensator svc is a power quality device, which employs power electronics to control the reactive power flow of the system where it is connected porate et al. Static var compensator svc, reactive power compensation, power quality, particle accelerator, harmonic filtering. This ensures fast response times with redundancy to maintain power performance requirements, lower energy costs and longer lives for the motors and process equipment. Static var compensators svc in the power system power. Physically, svc light can be considered a voltage source behind a reactance.
This paper constructed a 300mvar static var compensator system that regulates voltage on a 6000mva, 735kv system frequency 50hz 4. Lessons learned in static var compensator protection. In other words, static var compensators have their output adjusted to exchange inductive or capacitive current in order to control a power. Static var compensators are used by utilities in both transmission and distribution systems. Svc static var compensator statcom static synchronous compensator, svc light statcom hybrid. Voltage stability improvement using static var compensator in. Improvement by voltage profile by static var compensators. Improvement by voltage profile by static var compensators in distribution substation.
Static var compensator svc by providing dynamic reactive power svc can be used for the effectively control the reactive power, improve the power factor, purpose of regulating the system voltage compensating the voltage reduce the voltage influence and harmonic interference caused by. The fundamental frequency of the ac electric power distribution system is 50 hz. Static var compensator with the increasing necessity to utilise the existing transmission systems, to the fullest extent, several electronically controlled, extremely fast reactive compensators and. As a result, it is able to provide fastacting reactive power compensation on electrical systems. A static var compensator svc is used to regulate voltage on a 500 kv,3000 mvasystem. The design and performance of static var compensators for. The static var compensator svc is generally used as a voltage controller in power systems. Typically, this signal is generated at the bus where var compensation is required for holding specific power factors. Rtu communications interface with abb mach2 control system. Effect of fuzzy controller and changing 193 functions are more popular with the fuzzy logic theory, the reason being the simplicity of function, allowing for the prediction and calculation of an output of the fuzzy system10. The svc is a shunt device of the flexible ac transmission systems facts family using power electronics. Lessons learned in static var compensator protection aaron findley, mychal hoffman, power engineers, inc. Inverters, power transmission, static var compensators abstract. The advanced static var compensator now widely known as the static condenser or statcon uses a high power selfcommutating inverter to draw reactive current from a transmission.
Static var compensator svc is a power quality device, which employs power electronics to control the reactive power flow of the system where it is connected. The stateoftheart merus thyristor valve is extremely compact in design and delivers superior performance compared with other solutions available in the market. Merus static var compensator svc, another part of the merus facts family, is built on proven thyristor technology. Abb library is a web tool for searching for documents related to abb products and services. Design of static var compensator for power systems subject to voltage fluctuation satisfying bounding conditions suchin arunsawatwong1, kittichai tia2, and bundhit euaarporn3, nonmembers abstract this paper presents the design of a static var compensator for power systems subject to voltage uctuation by using a known framework comprising the. Protection of static var compensator halonen, mikael. These lifecycle are boosted by abb abilitytm, our portfolio of digital solutions. Static var compensator 4 the static var compensator increases the quality of power in many respects.
Pdf power flow models of static var compensator and static. Abb commissions worlds largest svc light installation in chile. Var compensator svc which fulfill the requirement of reactive power for a 1 ph, 50 hz. Thyristorbased static var compensator introduction. Tmeic releases reactive power var compensation feature for.
An advanced static var compensator using a threelevel npc inverter topology mustapha benghanem azeddine draou. Svc systems come in a wide number of arrangements, and are custom designed for specific applications. Shunt compensation for improvement of voltage stability using. When system voltage is high it absorbs reactive power svc inductive. Raleigh, nc september 21, 2005 abb, the leading power and automation technology group, today said it has won a contract to supply three static var compensators svcs for american electric power aep in texas to help control and stabilize voltage in areas of high load growth and wind generation. Static var compensatorsvc by providing dynamic reactive power svc can be used for the effectively control the reactive power, improve the power factor, purpose of regulating the system voltage compensating the voltage reduce the voltage influence and harmonic interference caused by at a reasonable level, improving the power flow capacity of. Var compensator frequency 50hz static var compensator system is shown in figure.
A static var compensator is a parallel combination of controlled reactor and fixed shunt capacitor shown in the figure below. Static var compensators svc portfolio siemens global. I n steadystate and dynamic n z performance of the static. Static var compensator is one such facts device, capable of improving the dynamic control of real and reactive power flow. June 23, 2017 toshiba mitsubishielectric industrial systems corporation tmeic has released a new feature for its popular medium voltage tmdrivemve2, expanding the capabilities of a variable frequency drive vfd already considered an industry best. Application of static var compensator in entergy system to address voltage stability issues planning and design considerations sharma kolluri, pe, ieee fellow entergy services, inc. An svc can improve power system transmission and distribution performance in a number of ways. The svc regulates voltage at its terminals by controlling the amount of reactive power injected into or absorbed from the power system. A svc of finite reactive power rating is placed at the load center in two bus equivalent model and it is shown in fig. Siemens svc classic provides dynamic reactive power compensation in rapid and variable ways. Svc systems come in a wide number of arrangements, and are custom designed for. The new 150 mvar, 18 kv static var compensator at cern. Var compensator could provide the fast acting voltage support necessary to prevent the possibility of voltage reduction and voltage collapse at the bus to which it is connected. If low voltage is the main concern, the svc can be modeled as a.
Static var compensator, using simpowersystems toolbox. Implement phasor model of threephase static var compensator. For remote applications such as pump and compressor stations, the signal may be where end users are metered for electricity bills. The static var compensator is connected parallel with the. The aircore reactors are series connected to thyristors. Disturbances may be caused by line faults, nonlinear components such as thyristor controls and rapidly varying active or reactive loads. Statcom hybrid, hybrid statcom, abb, svc, svc light statcom.
A static var compensator svc is a set of electrical devices for providing fast acting reactive power on highvoltage electricity transmission networks. You can use it with the phasor simulation type of the powergui block for studying dynamic performance and transient stability of power systems. Tmeic releases reactive power var compensation feature. A harmonic frequency is any sinusoidal frequency, which is a multiple of the fundamental frequency. The firing angle of the thyristor controls the voltage across the inductor and thus the current flowing through the inductor. Voltage control of transmission system using static var. The main function of svc is to control the voltage at weak nodes in the system. A new static var compensator svc system using threelevel inverter is proposed f o r high voltage and high power applications. An svc will typically regulate and control the voltage to the required set point under normal steady state and contingency conditions and thereby provide dynamic, fast response reactive power following system contingencies e. Disturbances may be caused by line switching, line faults, nonlinear components such as thyristor controls.
Its objectives includes, among other things, the modeling and simulation study of the use of svc in the nigeria 31bus 330 kv power transmission network, using. Static var compensator models for power flow and dynamic. Moga is applied to solve this complex multiobjective optimization problem. Svc static var compensator an insurance for improved grid system.
The analysis is based on the modelling of the system in the dq axis. Voltage stability improvement using static var compensator. Jun 23, 2017 additionally, the vfd requires a 4 20ma analog var signal input. Vector analysis and control of advanced static var compensators c. Static var compensators svcs are devices that can quickly and reliably control line voltages. Lifecycle services from facts, facts care, and facts upgrades gives you uptime insurance for your installation. Static var compensation systems svc sophisticated solution for us steel mill success story high power rectifiers in turgi, switzerland, delivered two static var compensation svc systems to a steel mill in the usa. The highest value of fitness function gives optimum location of svcs in given single line diagram. The equipment proposed to be installed include 60 kilovolt static var compensator svc enclosed within1,056 ft 2.
This paper investigates the effects of static var compensator svc on voltage stability of a power system. Implementation of static var compensator svc for power. The static var compensator block is a phasor model. Design of static var compensator for power systems subject to. The example described in this section illustrates application of simscape electrical specialized power systems software to study the steadystate and dynamic performance of a static var compensator svc on a transmission system. Time savings abb has ensured that the design concept of the modular container agb reduces on site construction time to a minimum. The thyristor switch assembly in the svc controls the reactor. A static var compensator has no significant moving parts other than internal switchgear. Pdf power flow models of static var compensator and. Svc configurations used to control reactive power compensation in electric power.
Its objectives includes, among other things, the modeling and simulation study of the use of svc in the nigeria. The voltage the voltage level of the system changes when there is a change in load and the drop in load voltage lead to demand for the reactive power. Abb ab, facts sweden summary static var compensator svc protection is presented. New feature makes tmdrivemve2 the ideal solution for new and retrofit projects. Pdf the static var compensator svc device in the power. Whensystem voltage is low the svcgenerates reactive power svc capacitive. Performance investigation of static var compensator svc with thyristor binary compensator at 500 kva distribution transformer 7 harmonics. The merus static var compensators stateoftheart high voltage thyristor valve, reliable controller, modern user interface and redundant technical design are combined into a fast, reliable and robust system that is easy to operate and complies with all standard communication protocols. The installation, as well as the precommissioning, has been completed successfully. Electric utility industry standardization of basic models is needed, and is recommended in. Their fast response offers a high potential for power system stability enhancement apart from steadystate flow control. This substation is one of the worlds largest and fastestacting concentrations of svcs photo courtesy of abb. A new static var compensatorsvc system using threelevel inverter is proposed f o r high voltage and high power applications.
The static var compensator svc is a shunt device of the flexible ac transmission systems facts family using power electronics to control power flow and improve transient stability on power grids 1. This paper will discuss how static var compensator successfully been applied to control transmission system. The static var compensators stateoftheart high voltage thyristor valve, reliable controller, modern user interface and redundant technical design are combined into a fast, reliable and robust system that is easy to operate and complies with all standard communication protocols. Ga gives set of values of fitness function for each case considered. Abb said it won the project, scheduled for completion by july 2006, because of proven. It can help maintain the voltage magnitude at the bus it is connected to at a desired value during load. Abb wins static var compensator svc contract from aep. The static var compensator is now mature technology that is widely used for transmission applications. The main function is to regulate the voltage at a given bus by.
Static var compensators are shuntconnected static var generators or absorbers whose outputs are varied to control specific parameters of the system. This ensures fast response times with redundancy to maintain power performance requirements, lower energy costs and. Installation of svc in load buses used for load compensation help in containing the voltage fluctuations, improve load power factor and also voltage profile. The svc classic from siemens use lighttriggered thyristors. The abb static var compensator includes the following major components.