Lic a center for applied mathematics, cornell university, ithaca, ny 14851, usa b department of computer science and center for applied mathematics, cornell university, ithaca, ny 14851, usa c department of computer science, cornell university, ithaca, ny 14851, usa. The difference is found in what we know about the status of the power lines. By driving forward a systemwide voltage optimization. She explains the differences between traditional voltvar management technologies and newer vvo technologies, as well as the benefits to electric utilities of. Moreover, pso has been expanded to handle combinatorial optimization problems and both discrete and continuous variables as well. The results obtained on ieee 30bus system showed that the hybrid method based on psoipm gives the best results compared to the other methods. For example, consider a portfolio that has a 1% oneday value. Electrical and computer engineering the objective of this study is to control voltage at different points in a distribution grid to within a speci. Vvo is an existing concept that to increase grid efficiency. A var p can be interpreted as a reduced form model. Measurement and verification for volt var optimization. How smart meters are helping utilities with voltage management. The president of beckwith electric will discuss advances in ltcvoltage regulator and capacitor controls for distribution voltvar control applications. This conference will present the economic case for voltvar optimization.
Volt var optimization technology works as expected testing validates that 24% energy and demand reduction is achievable. Voltvar management solutions for smart grid distribution. Introduction voltage regulation in distribution systems means maintaining acceptable voltages at all customer load points within ansi limits 0. Jackson explains that 4 ami includes advanced meters that will support greater customer energy usage 5 data and customer choice, more efficient outage management, and smart rate. Volt var optimization vvo concept volt var is a dual objective concept. The var of a portfolio measures the amount of potential loss within a specified time period with a degree of confidence. Voltvar optimization improves the efficiency of the distribution grid saving money, electricity and reducing emissions the distribution grid is inefficient. Zenios working paper 1603 the wharton financial institutions center the wharton school, university of pennsylvania, pa. Utilizing the results from aics cvr pilot project, aic is utilizing the following process for designing its voltvar implementation.
Ivvo is defined as integrated voltvar optimization electricity. Engineers and crews can view status of substation, feeders, capacitors and voltage devices, set control constraints, and operate switches manually. Value atrisk based portfolio optimization abstract the value at risk var metric, a widely reported and accepted measure of financial risk across industry segments and market participants, is discrete by nature measuring the probability of worst case portfolio performance. Value at risk var and conditional value at risk cvar are frequently used as risk measures in risk management. Integrated voltvar optimization with distributed energy sources to. He provides customer and industry linkage to beckwith electrics solutions, as well as contributing expertise for application engineering, training and product development. She explains the differences between traditional volt var management technologies and newer vvo technologies, as well as the benefits to electric utilities of adopting these technologies.
Ameren illinois considering model based vvo controller acquisition. Abstract we show that robust optimization of the var and cvar risk measures with. Conservation and optimization via voltvar control the smart grid experience. Chanceconstrained realtime voltvar optimization using. Note this function was named bin earlier versions of package vars.
Some of the original voltvar optimization vvo and conservation voltage reduction cvr schemes. Industry experience with voltvar optimization shows 1. It has been demonstrated that the proposed method can be easily. Cyme power engineering software voltvar optimization. Integrated voltvar regulationoptimization before diving into integrated voltvar optimization, it is important to understand the concept of var. Integrated voltvar regulationoptimization americans for a. Simulating such a system gives crucial information such as.
Session moderators jared green, epri joe paladino, doe. The vvo problem, in the classical sense, is the optimal operation of the capacitor banks and under load tap changers ultcs. Jan 30, 2017 tricia breeger of mitsubishi electric power products discusses volt var technologies. Galapagos san cristobal wind project voltvar optimization report. To implement var optimization, utilities switch shunt capacitors onto distribution system feeders to reduce the amount of power losses resulting from reactive. A multiobjective genetic algorithm spea2 improved using fuzzy logic is presented to solve the voltvar problem, since it is a combinatorial multiobjective optimization problem. Managing voltages to save energy and reduce peakdriven strains on the grid isnt a new idea. Would you freak out if i told you that the power we use and the power we see in our day to day lives is only a particular component of power. Bilevel voltvar optimization to coordinate smart inverters. A framework for voltvar optimization in distribution systems. Name role description system operator monitors and controls system operation telemetry interface provides telemetry data in the form of analog. Voltvar optimization improves grid efficiency introduction traditional voltage var management1 technologies have been used by the power industry for over 30 years to reduce electric line losses and increase grid efficiency. Ivvo stands for integrated voltvar optimization electricity.
Now, with smart grid technology, we can use a more intelligent approach and put into place volt var optimization, or vvo for short. Volt var optimization vvo function is a key element in advanced distribution management system dms functionality. Chance constrained programming is used to model solar uncertainty. Varbias as a new concept to unify vvo with oltcs and caps use a varias characteristic to change the response of the oltc regc or ltcc the varbias characteristic can be tailored for normal operation noncvr and cvr operation normal noncvr operation. Evaluation of conservation voltage reduction cvr on a national level. 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. Reactive power management aims to improve the power factor to reduce the active power losses in the circuit. Var stands for voltamps reactive and is the measuring unit for reactive power.
Var stands for voltamps reactive and is the measuring unit for reactive power, which is created by energizing transformers and powering motors, pumps, air conditioners, and other similar devices 2. Voltvar optimization summary voltvar optimization vvo is a tool to dynamically adjust the distribution system to reduce system losses and minimize demand. Voltvar optimization vvo is the tool which improves the efficiency of the distribution system by coordinating the voltage and reactive power. Tricia breeger of mitsubishi electric power products discusses voltvar technologies. The objective of the vvo techniques is to optimize some metric of the system performance such as active power loss or voltage. The voltvar optimization vvo analysis module simulates a voltvar management application. Deep reinforcement learning based voltvar optimization in. Aeps assessment of the potential for voltvar optimization concluded that the san cristobal grid is already operating at the lower end of the voltage range and cannot be further optimized without the risk of voltage drops below the authorized minimum level. Var optimization vvo methods to reduce customer power demand by controlling. Vector autoregressive models for multivariate time series. Equivalence of robust var and cvar optimization somayyeh lot stavros a. Voltvar optimization vvo via power factor correction was preferred strongly to cvr via active voltage regulation. Provide volt var optimization through capacitor bank control when there is a kvar limit excursion on an analog measurement. Voltvar control and optimization function in distribution.
Voltvar optimization vvo function is a key element in advanced distribution management system dms functionality. Vvo function is designed to optimize the voltage and reactive power flow in. Voltvar optimization improves the efficiency of the. The commands to simulate t 250 observations from a bivariate var1 model y 1t. Voltvar optimization vvo is a tool to dynamically adjust the distribution system to reduce system losses and minimize demand. Varflow temperature time of day season centralized automation. Minimizing cvar and var for a portfolio of derivatives s.
In general, a reduction in voltage results in a reduction in energy consumption. Voltvar optimization module is a powerful tool that helps find the optimal way to operate distribution network such that the need of todays and tomorrows demand can be met through energy efficiency improvement and demand reduction. Ivvo is defined as integrated voltvar optimization electricity somewhat frequently. Inverter var control for distribution systems with renewables. Evaluation of requirements for voltvar control and optimization. Var, svar and svec models in r recall from section2. By optimizing the reactive demands of the feeder the line flows are. Volt var optimization improves grid efficiency introduction traditional voltage var management1 technologies have been used by the power industry for over 30 years to reduce electric line losses and increase grid efficiency. Con edison, national grid, duke energy, and morristown utility systems will provide case studies of their vvo programs.
Dvi awarded patent for voltvar optimization voltvar control methodology expands on previous voltage conservation patent patent expands dvis reach into integrated distributed generation. Compared to var, cvar is attractive since it is a coherent risk measure. Dommel, life fellow, ieee abstractthe possibility of leveraging the data provided by smart meters to understand the load characteristics is studied in this paper. Cyme power engineering software and solutions voltvar. Simulating such a system gives crucial information such as the switching of capacitors and optimal tap positions of voltage regulators and ltcs leading to loss and demand reduction. The most widely used risk measure is value at risk var. Value at risk refers to the maximum loss, which should not be exceeded during a speci ed period of time with a given.
From the information provided so far, the extent of the voltage drop between the. Adopting voltvar optimization technologies january 30, 2017 nema communications no comments. How is integrated voltvar optimization electricity abbreviated. Some of the key benefits include demand reduction through voltage regulation, energy loss reduction by decreasing var flow, and improved power qualityasset health. Jackson explains that 4 ami includes advanced meters that will support greater customer energy usage. Optimize your distribution network through voltvar management. Before diving into integrated voltvar optimization, it is important to. This paper proposes a realtime voltvar optimization vvo strategy to control voltage regulators, switched capacitors, and pv inverters for minimizing the active power loss. Efficient treatment of mixedinteger nonlinear optimization problems minlps is one of the most difficult problems in practical optimization. Vvo refers to the optimization of reactive power and voltage regulation resources on the. Capacitor switch states, loads, voltages, and circuit var loss performance statistics are conveniently at their fingertips. Voltvar optimization vvo is quickly becoming a frequently discussed smart grid application for the distribution grid. This inefficiency leads to wasted electricity, unnecessary generation, squandered money, and harmful co2 in the atmosphere.
What is a non linear exposure in value at risk var. Cvr schemes were primarily scada actuated but were initiated by human operators. A framework for voltvar optimization in distribution systems article pdf available in ieee transactions on smart grid 63 may 2015 with 307 reads how we measure reads. Many schemes are in common use for verifying cvr results. Voltage and var optimization vvo is a key smart grid ap plication. In this paper i present four model frameworks that apply var. The optimization problem is generally nonconvex and therefore hard to solve. Conservation and optimization via volt var control tuesday, october 28, 2014 8.
Omaha, nb implementing voltvar optimization october 12. A framework for voltvar optimization in distribution systems hamed ahmadi, student member, ieee, jose r. A comprehensive methodology for voltvar optimization in active. We illustrate that var and cvar minimization problems for derivatives portfolios are. Vvo controller rules based acquired and implemented in ameren missouri. Utilities can know beforehand how much their network can be improved.
Simple paybacks for these projects were generally in the 0 2 year range. Grid2020 and dvi have collaborated to solve the global voltage optimization need by leveraging the versatility of the optanode dtm intragrid sensor to measure voltage data and feed realtime information into the edge voltage optimization engine, giving the market a completely new and financially compelling value proposition. A comprehensive methodology for voltvar optimization in. Abstractconservation voltage reduction cvr uses volt. This paper considers the problem of voltvar optimization vvo in active smart grids. Provide voltvar optimization through capacitor bank control when there is a kvar limit excursion on an analog measurement. Adopting voltvar optimization technologies nemacast. Minimizing cvar and var for a portfolio of derivatives.
Dynamic voltvar optimization challenges voltvar optimization are one of the fundamental power system functions for maintaining voltage profiles and reducing losses, yet being challenged by complex twoway power flow with ders e. Voltvar optimization vvo in utility distribution systems 1. Wayne hartmann is vp, protection and smart grid solutions for beckwith electric. The voltvar optimization vvo analysis module simulates a volt. Omaha, nb implementing voltvar optimization october 12, 2017. Voltvar optimization controller is a device controlled and managed by dscada and it interacts with rtus and field devices. Pdf a framework for voltvar optimization in distribution. Download pdf 28 kb the department of energys office of electricity oe recognizes that our nations sustained economic prosperity, quality of life. In the previous example, var refers to the loss that should not be exceeded with probability of 95 %. We propose a simple convex relaxation and prove that it is exact provided oversatisfaction of load is allowed.
Methodology for volt var optimization on a substation basis may th, 2011 version 1. Exploration of how smart inverters can enhance vvo 3. I will give you an answer that cannot be found in a textbook. We analyze the problem of computing the optimal var and cvar portfolios. This paper develops a modelfree voltvar optimization vvo algorithm via multiagent deep reinforcement learning. Volt var optimization vvo and conservation voltage reduction cvr provide an opportunity to improve the power system performance in terms of efficiency.
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