Todays electric grid is transforming into a smart grid and will eventually become what navigant consulting, inc. Bilevel voltvar optimization to coordinate smart inverters. Grid edge volt var control manage grid voltage to maximize operational benefits varentec provides a complete integrated volt var control solution to optimize both the primary and the secondary side of the grid. Arra sgig firstenergy services corporation smart grid. Smart grid application and testing volt var optimization testing.
Pdf a smart voltvar optimization engine for energy distribution. 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. 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. There is another function of the smart distribution grid the voltwatt function 1. Actually, it is a piecewise droop control function with a 2% droop value. Nowadays, various voltvar local control strategies built on customer photovoltaic inverters, e. A smart pv inverter can help regulate voltage by absorbing and injecting reactive power var tofrom the grid by using the voltvar control function. This paper proposes an innovative smart gridbased voltvar optimization vvo engine, capable of minimizing system power loss cost as well as the operating cost of switched capacitor banks, while. Yukon voltvar management software is one of eaton s grid. This paper presents an experimental analysis of the inverter volt var control method for voltage regulation. Utility grade software for smart grid distribution automation applications. Realtime local voltvar control under external disturbances. The power transmission smart grid technologies training system combines a modular design approach with computerbased data acquisition and control to provide unrivaled training in smart grid technologies related to power transmission.
It focuses on the analysis of the behaviour of distribution grids with the highest pv share, leading to the determination of the structure of the volt var control chain. Vvo refers to the optimization of reactive power and. Volt var control volt var control in distribution systems can be performed using distributed or centralized methods as described later in the text. Enabling smart grid voltvar control electricity today t. An effective vvms requires the coordination of distribution vvms equipment which. Pdf distribution smart grid is very important part of the smart grid. Aliprantis, senior member, ieee abstracta major technical obstacle for rooftop photovoltaics pv integration into existing distribution systems is the voltage.
The key requirements for rule 21 1 introduced an example curve for volt var control by smart inverters figure 16 in 1. Pdf smart grid adaptive voltvar optimization in distribution. He provides customer and industry linkage to beckwith electrics solutions, as well as contributing expertise for application engineering, training and product development. Because the ders have the capability of absorbing kvars, this function is similar to. Photovoltaic impact assessment of smart inverter voltvar. Pdf abstractvoltvar optimization is a renovated smart grid technology that utilized the advance smart grid assets such as advance. Apr 04, 2019 reflections on the topic of volt var control by smart inverters of ders. Introduction s olar photovoltaic pv penetration is continuously rising, and is expected to be tripled in the next 5 years in the usa 1. A smart grid is an electricity network that can intelli gently integrate the actions of all users connected to it generators, consumers and those that do bothin order. What is voltvar optimization and why is it so important. Smart inverter voltvar control functions for high penetration of pv on distribution systems 12. Grid edge volt var control provides realtime, granular control of voltage and vars, significantly better than primaryside control.
Discover why excessive voltampere reactive var power on a distribution network is inefficient and how the problem can be solved. Application of autonomous smart inverter voltvar function. Now, with smart grid technology, we can use a more intelligent approach and put into place voltvar optimization, or vvo for short. Voltvar optimization improves the efficiency of the.
A smart pv inverter can help regulate voltage by absorbing and injecting reactive power var tofrom the grid by using the volt var control function. Voltage and var optimization vvo is a key smart grid application. Reactive power priority is a setting for the volt var function, which acts to maintain voltage within acceptable limits. A comprehensive methodology for voltvar optimization in. The voltage limit violations in low voltage grid and the ict challenge are solved by using concentrated reactive devices at the end of low voltage feeders. Voltage and var optimization vvo is a key smart grid ap plication. Distributed voltage regulation using voltvar controls of. 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. Management using energy storage, 4 advanced voltvar.
For smart grid distribution automation applications. Request pdf a comprehensive methodology for voltvar optimization in active smart grids this paper considers the problem of voltvar optimization vvo in active smart grids. Yukon voltvar management software energy efficiency eaton. The difference is found in what we know about the status of the power lines. As advanced metering infrastructure operates in quasi realtime based on smart meter data collection that is typically every 5, 10 or 15 min, smart grid volt var optimization solutions have to optimize distribution grid in quasi realtime intervals as well. Comparison of volt var slope impact on oscillations assigned volt var curve measured points medium voltage low voltage assigned volt var curve measured points low voltage medium voltage 45% per 0. Omaha, nb implementing voltvar optimization october 12. The voltvar controller vvc located at a substation interacts with vvc. Applying results, reaching beyond volt var optimization technology works as expected testing validates that 24% energy and demand reduction is achievable. Voltvar interdependencies between different voltage levels in order to study the impact of reactive power injection on radial grid structures and on the voltage of the higher voltagelevel grids a 3311 kv test grid connected through a. Several utilities improved power factors to near unity through integrated voltvolt ampere reactive controls ivvc, and one utility reduced reactive power requirements by about 10% % over one year. 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.
Optimized var flow improves power factor and may result in substantial savings in cost of energy and infrastructure utilization. This can be achieved by specially designed computer software. Pdf state estimation and voltvar control in smart distribution grid. Smartgrid is a catchall term that encompasses a large number of arising developments in electrical grid design, operation and control and it is often loosely described as the marrying of information technologies, such as wireless smart devices, with the electrical grid to create what has been called the energy internet. Voltage stability in a gridconnected inverter with. Colopy daniel arden cooper power systems usa cooper power.
The system features the fourquadrant dynamometerpower supply, model 8960, and the data acquisition and control interface, model 9063, two stateoftheart usb. Increasing electric distribution efficiency, primarily through integrated voltvar control ivvc. This paper introduces a novel local voltvar control strategy in a lowvoltage smart grid. However, to optimize volt var control, it is imperative that devices are properly located in the distribution system. Because the ders have the capability of absorbing kvars, this function is similar to the voltvar with var priority mode. Smartgrid is a catchall term that encompasses a large number of arising developments in electrical grid design, operation and control and it is often loosely described as the marrying of information technologies, such as wireless smart devices, with the electrical grid to. Abbs gridsync combines sensors with wireless communications to increase grid visibility and efficiency. Smart grid sustainable technologies evaluation program. Traditional voltage var management1 technologies have been used by the power industry for over 30 years to. Voltvar management solutions for smart grid distribution. Introduction a ctive smart grids are equipped with renewable energy.
Yukon volt var management software applications installed at a number of utilities across north america presently control more than 20,000 capacitor banks. Reflections on the topic of voltvar control by smart inverters of ders. The smart grid investment grant sgic program under the american. This paper proposes a coordinated volt var control architecture between the lv distribution transformer and solar inverters to optimize the pv power.
Irvine smart grid demonstration 07292015 panel session. Voltvar management software mediumvoltage capacitors. Wayne hartmann is vp, protection and smart grid solutions for beckwith electric. This paper presents an experimental analysis of the inverter voltvar control method for voltage regulation. Challenges of grid modernization traditional modern electricity. Index termsvoltvar optimization, smart inverters, dis. Integrated volt var control documented in this use case requires that the circuit reconfiguration control area circuits that the integrated volt var control circuit devices operate in, is in the normal circuit configuration state. 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. Omaha, nb implementing voltvar optimization october 12, 2017. 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. It focuses on the analysis of the behaviour of distribution grids with the highest pv share, leading to the determination of the structure of the voltvar control chain.
Before diving into integrated voltvar optimization, it is important to. This use case does not currently document the scenario of integrated volt var control being. These software applications help utility companies implement smart grid strategies while enhancing system optimization. Voltvar power factor control dynamic reactive current support connectdisconnect power curtailment voltwatt voltage ride through. What is voltvar optimization and why is it so important for. Facilitating changes in customer behavior, either by shifting usage away from. Obtain grid efficiencies and conservation voltage reduction. Utility investment in communications and smart grid investment links all facets from endcustomer to generation, transmission. The key requirements for rule 21 1 introduced an example curve for voltvar control by smart inverters figure 16 in 1. Power transmission smart grid technologies training system.
Impact of smart inverter control with pv systems on voltage regulators in active distribution networks 10. Firstenergy services corporations firstenergys smart grid modernization initiative sgmi involved deployment of advanced metering infrastructure ami, distribution automation da, voltvar optimization vvo, timebased rate programs, direct load control dlc devices, and customer systems in parts of new jersey, ohio, and pennsylvania. Effects of the reactive power injection on the gridthe. Integrated voltvar regulationoptimization americans for a. Active powerreactive power mode wattvar the capability. Voltvar management software vvms is centralized distribution automation software that optimizes circuit var flow and circuit voltages. Vvms is for use in combination with our highquality capacitor banks, highlyreliable and safe vacuum capacitor switches, and advanced capacitor controls. This is a use case document that describes how to provide voltvar optimization through capacitor bank. This paper presents a rigorous stability analysis of a grid connected inverter under simultaneous operation of automatic volt watt and volt var response functions. Energies free fulltext behaviour of distribution grids.
Semantic scholar extracted view of smart grid adaptive voltvar optimization in distribution networks by moein manbachi. Edge computing and distributed intelligence for grid. Voltage regulation in lv grids by coordinated voltvar. Colopy daniel arden cooper power systems usa cooper power systems usa cooper power systems usa.
Nov 07, 2011 discover why excessive voltampere reactive var power on a distribution network is inefficient and how the problem can be solved. This paper proposes an innovative smart grid based volt var optimization vvo engine, capable of minimizing system power loss cost as well as the operating cost of switched capacitor banks, while. Integrated voltvar control ivvc coordinated control of substation load tap changers, feeder voltage regulators and capacitor banks ensure var and voltage profiles to optimize these benefits. 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. Distributed voltage regulation using voltvar controls of a.
Utilities use distribution management system dms as supervisory control layer. Smart grid pilot projects volt var optimization 16 vvo pilot smart inverter field trial adjust smart inverter p. Smart inverter capabilities for mitigating overvoltage on distribution systems with high penetrations of pv 11. Advanced voltvar control element of southern california edisons. The decentralized integrated volt var controller ivvc system manages and controls volt var profiles for distribution feeder circuits. Voltvar optimization as a critical component of smart grid applications. Smart grid ready pv inverters with utility communication. Methodology for volt var optimization on a substation basis may th, 2011 version 1. This paper presents a rigorous stability analysis of a gridconnected inverter under simultaneous operation of automatic voltwatt and voltvar response functions. The four main applications that provide the most benefit to the grid are 1 voltvar optimization sometimes called.
As advanced metering infrastructure operates in quasi realtime based on smart meter data collection that is typically every 5, 10 or 15 min, smart grid voltvar optimization solutions have to optimize distribution grid in quasi realtime intervals as well. Yukon voltvar management software applications installed at a number of utilities across north america presently control more than 20,000 capacitor banks. Voltage stability in a gridconnected inverter with automatic. C i r e d 21st international conference on electricity distribution frankfurt, 69 june 2011 paper 0518 paper no 0518 14 voltvar control for smart grid solutions ljubomir a. Voltage and var optimization vvo is a key smart grid ap.
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