Coordinated voltvar control for realtime operation of smart. Yukon voltvar management software is one of eaton s grid. With realtime monitoring and control capabilities, edge control systems collect, refine, and process data from connected products to enhance management of grid, microgrid, and assets. Smart inverter grid support functions remote onoff power factor control volt var volt watt frequency watt reactive power control low high voltage and frequency ride through. This includes peak demand control, energy conservation through voltage.
Var flow and voltage control are by their nature linked. To verify that the generator excitation control system or plant volt var control function1 model including the power system stabilizer model and the impedance compensator model and the model parameters used in dynamic simulations accurately represent the generator excitation control system or plant volt var control. Voltage and var optimization vvo is a key smart grid ap plication. This use case does not currently document the scenario of integrated volt var control being disabled revert vvc controlled devices to their normal baseline state upon recent of a circuit reconfiguration control area in abnormal state for those circuits with integrated vol t var control nor the return to normal volt var control. The main objective of this function is reducing the overvoltage by reducing the kw of some ders. Vvms is for use in combination with our highquality capacitor banks, highlyreliable and safe vacuum capacitor switches, and advanced capacitor controls. Interactive multiobjective daily volt var control of distribution networks considering wind power and fuelcell power plants t niknam, m zare, j aghaei, r azizipanahabarghooee journal of. Ge digital energy presentation for advanced grid technology workshop at nrel on nuly 7, 2015.
This study considers the implementation of a voltage control loopwithinrooftoppvinverters,tomaintainthevoltagewithin acceptable bounds byreactive power injection or absorption. Workforce of the future project domains subprojects smart energy customer solutions next generation. The decentralized integrated volt var controller ivvc system manages and controls volt var profiles for distribution feeder circuits. Proposed approach enjoys high efficiency for various scenarios of modified ieee 6bus and 118bus test systems. Voltage stability in a gridconnected inverter with automatic. In principle, this can be considered to be a form of voltvar con. Grid edge control extracting value from the distribution. Var control in a smart grid world expanded objectives for volt. Introduction voltage and var control vvc and optimization vvo are a key smart grid applicatio s. Coordinated voltvar control for realtime operation of. Advanced voltvar control element of southern california edisons. Hpcbased intelligent volt var control of unbalanced distribution smart grid in the presence of noise article pdf available in ieee transactions on smart grid pp99.
Advanced volt var control, 5 self healing circuits, 6 deep grid situational awareness, 7 secure energy networking, and. Pdf distribution smart grid is very important part of the smart grid. Jul 14, 2016 user defined inverter voltvar curves for optimal voltage control. Coordinated voltvar control in smart distribution system.
Hpcbased intelligent voltvar control of unbalanced. Exactly how smart grid capabilities create value relative to a traditional grid the size of the various benefits economic, reliability, environmental, and customer choice as supported by available research, expressed per customer per. Reflections on the topic of voltvar control by smart. Voltage and var optimization vvo is a key smart grid ap. The volt var control system solution incorporates both hard. Features of volt var secondary control loops ensure a resilient behavior of the whole c hain. Optimization via volt var control benefits from automated voltage controls for conservation voltage cvr typically produce 2% 4% reduction in energy use, but difficult to verify and validate savings.
Inverter var control for distribution systems with. Power factor control, volt var control, and volt watt control are the most common grid support functions targeting voltage related issues at the distribution level. Smart inverters for utility and industry applications 9. Because the ders have the capability of absorbing kvars, this function is similar to the voltvar with var priority mode.
The injection of kvars by smart inverters based on such voltvar control curves is an iterative process. The volt var app analyzes these same data points and alerts the volt var control system if the app determines that voltage measured by the smart meters is too low or too high, or if reactive power is too high, based upon all available sensor data from the medium and low voltage networks. The methodology intended for the coordinated volt var control conveys the minimization of the voltage violations and also a better distribution of the number of commutations among the control equipments. Ge has smart grid products and services that can improve your performance today. The distributed control scheme based on the automated agent technology is the first solution to the volt var control problem presented in this thesis. Several utilities improved power factors to near unity through integrated volt volt ampere reactive controls ivvc, and one utility reduced reactive power requirements by about 10% % over one year. M aximiz ing value involves selectively choosing feeders for volt var. Voltage stability in a gridconnected inverter with.
Firstenergy services corporations firstenergys smart grid modernization initiative sgmi involved deployment of advanced metering infrastructure ami, da, voltvar optimization vvo, timebased rate programs, direct control dlc devices, and customer systems in parts of new jersey, ohio, and pennsylvania. Typical diagram illustrating how yukon ivvc application works within a power distribution system. Smart grid is referred to by other names including smart electric grid, smart power grid, intelligrid, and future grid 1. Var control include basic requirement maintain acceptable voltage support major smart grid objectives. Colopy daniel arden cooper power systems usa cooper power systems usa cooper power systems usa. They feature an extensive range of control modes including remote, automatic and manual control. Pdf analysis of the voltvar control scheme for smart distribution. Obtain grid efficiencies and conservation voltage reduction 3. The volt var management market has been segmented based on application into generation, transmission, and distribution. The objective of the vvo techniques is to optimize some metric of the system performance such as active power loss or voltage. Volt var optimization results were a surprise to epris sevenyear smart grid demonstration initiative team.
Pdf advances in voltvar control approaches in utility. Farid katiraei, director renewables and sustainability. Grid modernization initiative, distributech 020816 pdf letters of support letters of commitment if you are looking for a letter of support or commitment for a california energy. Early voltvar automation and control is revamped with communications and firmware upgrades. Index termssolar photovoltaic system, smart grid, volt var control, smart inverter, realtime control, distributed control. Voltvar management software vvms for smart grid distribution. Keywords distributed generation, linkarchitecture, smart grid, transmission grid, volt var control, volt var. Conservation and optimization via volt var control. In 20, using opendss, one study modeled grid connected smart inverters for pv systems with the capability of volt var, volt watt, and dynamic reactive power control and analyzed their impact on the voltage of distribution feeders 9. Yukon volt var management software applications installed at a number of utilities across north america presently control more than 20,000 capacitor banks. Eaton s yukon voltvar management software applications monitor realtime voltages, watts and vars from ltcs, regulators, capacitors, medium voltage sensors, and additional monitoring points such as customer meters. Integrated voltvar control enables smart grid power quality strategies. Existing control schemes maintain voltage in an acceptable range, but opportunity exists.
This paper introduces a novel local volt var control strategy in a lowvoltage smart grid. The effect of the voltvar control of photovoltaic systems on. The volt var controller vvc located at a substation. Vvo refers to the optimization of reactive power and. This is a use case document that describes how to provide voltvar optimization through capacitor bank control when there is a kvar limit excursion on an analog measurement. Voltage and var optimization vvo is a key smart grid application.
Smart inverter capabilities for mitigating overvoltage on distribution systems with high penetrations of pv 11. Applying results, reaching beyond volt var optimization technology works as expected testing validates that 24% energy and demand reduction is achievable. Voltage regulation in lv grids by coordinated voltvar. This use case does not currently document the scenario of integrated voltvar control being disabled revert vvc controlled devices to their normal baseline state upon recent of a circuit reconfiguration control area in abnormal state for those circuits with integrated vol t var control nor the return to normal voltvar control operations. The energy central power industry network is based on one core idea power industry professionals helping each other and advancing the industry by sharing and learning from each.
The performance of volt var optimization has been significantly improved due to the integration of measurement data obtained from the advanced metering infrastructure of a smart grid. This paper proposes a coordinated volt var control. Todays emphasis on implementing energy efficiency programs and limiting peak demand growth has driven renewed interest in the most effective method to implement smart grid voltampere reactive control, or smart grid voltvar control, on distribution systems. Voltage and var control applications including smart inverters, energy storage, and secondary side solutions dr. An alternative form of volt var control on the secondaryside using lowvoltage connected edgeof grid devices is found to be promising in regulating the secondary circuit voltages within. Todays emphasis on implementing energy efficiency programs and limiting peak demand growth has driven renewed interest in the most effective method to implement smart grid volt ampere reactive control, or smart grid volt var control. Conditions for the existence of an equilibrium voltage are established together with tests that characterize its stability in terms of the inverter and line parameters. Pdf advances in voltvar control approaches in utility distribution. The vvc is interfaced with the distribution scada dscada through an rtu.
For more efficient, higher quality and less costly power eaton. The demonstration site substation will also host a high temperature superconducting fault current limiting. Enabling smart grid voltvar control electricity today t. Intelligence, understanding and control improvements ranging from incidental through monumental give utilities, consumers and regulators better ways to manage energy usage and control. Volt var control for more efficient, higher quality and less costly power yukon energy automation software platform. Smart inverter grid support functions remote onoff power factor control volt var volt watt frequency watt reactive power control low high voltage and frequency ride through power curtailment. Introduction voltage and var control vvc and optimization vvo are a key smart grid. This can be achieved by specially designed computer software. Voltvar management solutions for smart grid distribution. The distributed control scheme based on the automated agent technology is the first solution to the volt var control. This paper proposes a coordinated volt var control architecture between the lv distribution transformer and solar inverters to optimize the pv power.
There is another function of the smart distribution grid the voltwatt function 1. Smart inverter volt var control functions for high penetration of pv. The vvo problem, in the classical sense, is the optimal operation of the capacitor banks and under load tap changers ultcs. Now, with smart grid technology, we can use a more intelligent approach and put into place volt var optimization, or vvo for short. A coordinated voltvar control scheme for distribution. Utilities use distribution management system dms as supervisory control layer.
Pdf hpcbased intelligent voltvar control of unbalanced. This is a use case document that describes how to provide voltvar optimization through capacitor bank control. A comprehensive methodology for voltvar optimization in. Volt var control optimization bob uluski quanta technology. However, to optimize volt var control, it is imperative that devices are properly located in the distribution system. Pdf state estimation and voltvar control in smart distribution grid. Grid modernization collaboration and partnership edison. Volt var control, power system, security, machine learning, random forest, multiagent system 1.
Introduction s olar photovoltaic pv penetration is. Advanced volt var control, 5 self healing circuits, 6 deep grid situational awareness, 7 secure energy networking, and 8 workforce of the future. This research explores one aspect of the smart grid in voltages at a fixed frequency 5. This use case does not currently document the scenario of integrated volt var control being disabled revert vvc controlled devices to their normal baseline state upon recent of a circuit reconfiguration control area in abnormal state for those circuits with integrated vol t var control nor the return to normal volt var control operations.
This paper presents a rigorous stability analysis of a grid connected inverter under simultaneous operation of automatic volt watt and volt var response functions. Actually, the use of the voltvar control vvc is considered one of the most important and desired functions in the context of distribution systems modernization, in view of the rise of communication technologies and new controllable equipment. The volt var controller vvc located at a substation interacts with vvc, devices on several circuits rom theserved f substation. This paper proposes a new approach to the development of coordinated volt var control for realtime operation of smart distribution grids.
Reactive power priority is a setting for the volt var function, which acts to maintain voltage within acceptable limits. Voltvar optimization improves the efficiency of the. Ders to the grid to help mitigate the voltage violations 3. The team found both vvo approaches can be extremely impactful for reducing. While the industry is moving towards adopting solar pv. C i r e d 21st international conference on electricity distribution frankfurt, 69 june 2011 paper 0518 paper no 0518 14 volt var control for smart grid solutions ljubomir a. Actually, the use of the voltvar control vvc is considered one of the most important and desired functions in the context of distribution systems modernization, in. Accomplish energy conservation improve efficiency dreduce techlhnical llosses. Volt var control volt var control in distribution systems can be performed using distributed or centralized methods as described later in the text. A common set of the inverter grid support functions have been developed 1. Nowadays, various volt var local control strategies built on customer photovoltaic inverters, e. Integrated volt var control enables smart grid power quality strategies 2 eaton yukon energy automation software platform. Yukon voltvar management software energy efficiency eaton. Abstractsouthern california edison is developing a smart.
Coordination of electrical distribution grid voltage control a fairness approach rasmus pedersen christoffer sloth rafael wisniewski abstractin this paper, we present a method for distributing controller gains to assets offering local volt var control. Coordination of electrical distribution grid voltage. The methodology intended for the coordinated volt var control conveys the minimization of the voltage violations and also a better distribution of the number of commutations among the control. Volt var optimization vvo overview technology and infrastructure upgrades integrated into the electric distribution system to optimize voltage levels utilizes communications and computerized intelligence to control voltage regulators and capacitors on the distribution grid. Index terms inverter, meter, power capacitors, reactive power i. Ecostruxure grids edge control systems encompass solutions for substation automation, distribution automation, smart metering, and microgrids. Remote updating functionality dynamic voltvar support source. The vvo problem, in the classical sense, is the optimal operation of the capacitor banks and under.
Integrated voltvar control mike prevallet, sales engineer tom johnson, regional directorenergy automation solutions. These software applications help utility companies implement smart grid strategies while enhancing system optimization. Workforce of the future project domains subprojects smart. Effects of the reactive power injection on the gridthe. Two timescales as mentioned earlier, there are two types of control devices with two different control timescales. Smart grid development has underscored the need for deep. Includes key trends, holistic solutions, integration of renewables, big data, industry s tandards, and software applications. Centralized or distributed control of the volt var control device integrated with heuristic based control scheme can be a promising solution to this problem. Integrated volt var control enables smart grid power quality strategies 2 eaton. Introduction his document describes the advanced voltvar control avvc element of sces isgd. Grid demonstration project in irvine california under arra funding from the doe. For smart grid distribution automation applications.
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