[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
CMU study finds controlled EV charging can reduce generation cost, but at greater health and environmental costs depending upon the generation mix
April 16, 2015
In a study focused on the PJM portion of the US electricity grid, researchers at Carnegie Mellon University (CMU) found that although charging electric vehicles at night (when electricity is cheap and wind power is typically more plentiful) could lower electricity costs, doing so also creates more air emissions, and that the health and environmental costs from these emissions outweigh the electricity cost savings. A paper describing the work is published in the ACS journal Environmental Science & Technology.
Results from the study also suggest that with sufficient coal plant retirement and sufficient wind power, controlled charging could result in positive net benefits instead of negative. The result of the analysis depends on the details of the region, notes CMU Professor Jeremy Michalek, corresponding author—i.e., other parts of the US and the world could be different. The question of electricity costs vs. health and environmental cost is important to ask everywhere, Michalek said.
Navigant forecasts vehicle-grid integration services revenue to reach nearly $21M by 2024
March 10, 2015
The term VGI refers to a suite of hardware and software technologies that enable plug-in electric vehicles (PEVs) to participate in grid services such as the ancillary services markets (typically frequency regulation), demand response (DR) programs, and/or the operation of microgrids. The VGI market can be separated into two categories, according to the report: PEVs can provide services to the grid by changing the rate at which they consume power, which is known as vehicle-to-grid communications for charge management, or V1G. Or they can provide power back to the grid, a bidirectional system known as vehicle-to-grid power transfer, orV2G. While V2G pilots have taken center stage, to date, V1G pilots have fewer barriers in regards to automaker adoption and accessible markets.
SDG&E piloting integration of EVs and energy storage systems into CAISO energy markets for demand response services
February 24, 2015
In a pilot vehicle-to-grid project, San Diego Gas & Electric (SDG&E) is actively bidding a group of energy storage systems and electric vehicle fleets as one resource directly into the California Independent System Operator’s (CAISO) energy markets. These markets include those that address short-term imbalances in electricity supply caused by such things as intermittent renewable energy. This marks SDG&E as one of the first utilities to integrate EVs into California’s wholesale energy market.
The project currently aggregates stationary storage systems together with the charging demand of EV fleets at five separate locations throughout San Diego County. The assets are remotely controlled using software that both balances the participant’s charging needs, and identifies opportunities to provide demand response services at the grid level.
PG&E proposes major build-out of 25,000 electric vehicle charging stations in California
February 09, 2015
Pacific Gas and Electric Company (PG&E) has filed an application with the California Public Utilities Commission (CPUC) for permission to build an estimated 25,000 electric vehicle (EV) chargers at sites across its service area in Northern and Central California—8 times the number currently installed. If approved, this program would be the largest deployment of EV charging stations in the country, PG&E said.
The cost of the plan would be shared by all electric customers as a contribution to helping the state meet its clean air and climate goals. The total impact on system average bundled rates would be minimal in 2016 and 2017 and would average only a tenth of a cent per kilowatt-hour over the next five years of the program. A typical residential customer would pay about 70 cents more per month over the period 2018 to 2022, according to PG&E.
BMW presents research application for inductive charging at CES
January 07, 2015
At CES, BMW is demonstrating a research application for inductive—i.e. wireless—battery charging using a BMW i8. Earlier this year, BMW and Daimler agreed jointly to develop and to implement one common technology for wireless recharging high-voltage batteries of electric drive and plug-in hybrid vehicles. (Earlier post.)
Inductive charging provides reliable, wear-free and user-friendly EV battery charging using a magnetic field, without the need for a hard-wired connection between the vehicle and the power source. The system comprises a primary and a secondary coil. The primary coil is fitted in a base pad underneath the vehicle, for example on or embedded in the garage floor. The secondary coil is integrated in the underside of the BMW i8.
BMW i ChargeForward Program to demo contribution of intelligent EV charging to grid efficiency
January 05, 2015
At the Consumer Electronics Show in Las Vegas, BMW announced the BMW i ChargeForward Program—a pilot study to be undertaken by the BMW Group Technology Office, together with Pacific Gas & Electric Company (PG&E). Working with a select group of BMW i3 drivers, BMW i ChargeForward will demonstrate how intelligent management of electric vehicle charging can contribute to improved electric power grid efficiency while reducing total cost of electric vehicle ownership.
BMW i ChargeForward is designed to explore how to better match the impact of electric vehicles with other dynamic energy supply and demand sources. The study has two parts, a managed charge pilot program involving BMW i3 owners and a battery second life energy storage system. In the managed charge pilot program, select BMW i3 owners will allow PG&E to request a delay in the charging of their vehicles by up to an hour, when grid loads are at their peak. The program also includes a “second life” for used MINI E batteries, by repurposing these batteries into a stationary solar-powered electric storage system located at the BMW Technology Office in Mountain View, California.
DOE releases report from 6 projects evaluating EV charging impacts on grid and customer charging behaviors
December 21, 2014
|Charging patterns with (TOU) and without (RES) whole house time-of-use rate during summer weekdays at Progress Energy, one of the participating utilities. (Peak period is in gray.) Click to enlarge.|
The US Department of Energy (DOE) has released a report detailing the findings from six utilities which evaluated operations and customer charging behaviors for in-home and public electric vehicle charging stations. The work was done under the DOE’s Office of Electricity Delivery & Energy Reliability’s (OE) Smart Grid Investment Grant (SGIG program).
This report provides the results of these SGIG projects to help individual utilities determine how long existing electric distribution infrastructure will remain sufficient to accommodate demand growth from electric vehicles, and when and what type of capacity upgrades or additions may be needed. The report also examines when consumers want to recharge vehicles, and to what extent pricing and incentives can encourage consumers to charge during off-peak periods.
California to award up to $4M for projects to advanced smart charging and V2G technologies
December 19, 2014
The California Energy Commission has issued a solicitation (PON-14-310, Driving the Integration of Electric Vehicles to Maximize Benefits to the Grid) to fund Applied Research and Development projects that will advance technologies and strategies for smart and efficient charging and vehicle-to-grid communication interfaces that will provide maximum benefits to both the electricity grid and the plug-in electric vehicle (PEV) market.
There is up to $4 million available for grants awarded under this solicitation. The minimum funding amount for each project is $500,000; maximum funding amount is $1.5 million. Match funding is not required for this solicitation; however, applications that include match funding will receive additional points during the scoring phase.
Siemens, Duke Energy and Ford demonstrate lower cost home smart charging technology for plug-ins; due on market next year
December 05, 2014
Siemens Energy Management Division has teamed with Duke Energy and Ford to demonstrate the results of an 18-month effort to reduce the cost and expand electric vehicle charging technologies. Held at the Duke Energy Envision Center in Erlanger, Ky., and utilizing a Ford Fusion Energi Plug-In Hybrid, Siemens provided the first UL-approved residential electric vehicle supply equipment (EVSE) to demonstrate the ability to monitor status, report energy use, and be controlled locally from the local area network and from the cloud.
In 2012, Siemens was awarded $1.6 million in development funding from the US Department of Energy (DOE) to support research aimed at significantly reducing the current costs of electrical vehicle (EV) chargers and developing “smart” charging capabilities that support power grid efficiency and consumer demand.
Air Force tests all plug-in vehicle fleet in California; part of large DoD V2G project
November 14, 2014
|A fleet of plug-in electric vehicles sits ready to roll at Los Angeles Air Force Base in El Segundo, California. (US Air Force photo by Sarah Corrice/RELEASED.) Click to enlarge.|
The Air Force unveiled the Department of Defense’s first non-tactical vehicle fleet composed entirely of plug-in electric vehicles at Los Angeles Air Force Base today. The 42-vehicle fleet marks a milestone in partnership between federal, state and private energy organizations, as well as in DoD’s demonstration of emerging vehicle-to-grid technology.
The PEV fleet includes both electric and hybrid vehicles ranging from sedans to trucks and a 12-passenger van. California energy providers and regulators worked closely with the Air Force on safety and performance testing as well as technical and regulatory aspects of launching the vehicles.
Nissan begins testing combination of LEAF EVs and “LEAF to Home” for grid demand response services
October 16, 2014
Nissan Motor Corporation has begun testing in Japan of a system to use electric vehicle technology to help power grids cope with peaks in demand.
Nissan is using Nissan LEAF EVs paired with the LEAF to Home power supply system (earlier post) for demand response testing at several of its sales outlets run by subsidiary Kanagawa Nissan Co., Ltd. to assess the effectiveness of EV batteries when used for energy management. The tests are being conducted by ENERES Co., Ltd.
EPRI and partners to stage public demo of Open Vehicle-Grid Integration (VGI) Platform software
October 14, 2014
The Electric Power Research Institute (EPRI), along with several auto manufacturers, utilities, and regional transmission organizations, will demonstrate the Open Vehicle-Grid Integration (VGI) Platform software system, developed by EPRI and Sumitomo Electric Industries. The software is an advanced software platform for integrating plug-in electric vehicles (PEV) with smart grid technologies. (Earlier post.)
The live demonstration will showcase demand response and load curtailment capabilities through a single standards-based interface. The demonstration will involve 8 EV manufacturers, and attendees will include representatives from the state and federal public agencies involved with clean energy and transportation technologies, as well as the utility and automotive industries.
EPRI, 8 automakers and 15 utilities to create an open grid integration platform for plug-in electric vehicles
July 29, 2014
The Electric Power Research Institute, 8 automakers and 15 utilities are working to develop and to demonstrate an open platform that would integrate plug-in electric vehicles (PEVs) with smart grid technologies enabling utilities to support PEV charging regardless of location. The open platform will simplify and streamline V2G (vehicle-to-grid) communications, enabling PEVs to provide grid services and increasing the overall value proposition of plug-in vehicles.
The goal of this program is to develop a cloud-based, central server that would receive grid requests from a utility—such as Demand Response—and then translate and standardize that request so it could be relayed to all appropriate plug-in vehicles in the designated area. Automakers would be expected to develop and deploy technologies compatible with these smart grid communications.
Japan automakers form joint venture to advance electric charging infrastructure: Nippon Charge Service
May 30, 2014
Toyota Motor Corporation, Nissan Motor Co., Ltd., Honda Motor Co., Ltd., and Mitsubishi Motors Corporation have jointly established a new company, Nippon Charge Service, LLC, to promote the installation of chargers for plug-in electric vehicles (PHVs, PHEVs, EVs). The goal is to help build a charging network that offers more convenience to drivers in Japan.
The new company will promote the installation of chargers, for the good of society and to expand the use of electric-powered vehicles. Related industries are also expected to benefit. Development Bank of Japan Inc. (DBJ) will support the joint effort of the four automakers by investing in the new company with its “Fund for Japanese Industrial Competitiveness”.
The Volvo Group studies potential for dynamic charging for city buses with test electric road
May 19, 2014
The Volvo Group, in collaboration with the Swedish Transport Administration, will study the potential for building electrified roads on which city buses can be charged inductively at the same time as the bus is in operation (dynamic charging). A 300- to 500-meter electric road may be built for test operations in central Gothenburg during 2015.
The Volvo Group will develop a detailed proposal within the framework of innovation procurement from the Swedish Transport Administration. The proposal entails building a road section equipped with wireless charge technology and developing vehicles that will automatically charge their batteries when passing such a road section.
UC Riverside opening Sustainable Integrated Grid Initiative; integration of solar energy, battery storage and electric and hybrid vehicles
May 15, 2014
|Schematic of the “New Grid Testbed” components, including renewable energy generation, energy storage, smart distribution and electric transportation Click to enlarge.|
The University of California, Riverside is opening its Sustainable Integrated Grid Initiative to research the integration of: intermittent renewable energy, such as photovoltaic solar panels; energy storage, such as batteries; and all types of electric and hybrid electric vehicles. It is the largest renewable energy project of its kind in California.
The first two years of operation is supported by a $2-million contract from the South Coast Air Quality Management District, awarded in January 2012. Construction of the initial testbed platform was also supported by an additional $10 million in contributions from UC Riverside and private partners. The testbed, which is located at UC Riverside’s Bourns College of Engineering Center for Environmental Research and Technology (CE-CERT), includes:
Lord Drayson launches business to commercialize efficient wireless power transfer over distances; ongoing partnership with Imperial College London
May 07, 2014
Lord Drayson has launched Drayson Wireless Limited, a new venture to commercialize technology developed at Imperial College London (ICL) for the efficient wireless transfer of power over longer distances. Working closely with Imperial Innovations plc, Drayson Wireless will rapidly bring the technology to market in numerous applications and sectors.
The Drayson Wireless near-field systems can transfer up to 1.5 kW over a distance of up to 0.5 m using a lightweight receiver weighing less than 0.3 g/W. In addition, Drayson Wireless long distance power transfer system can transfer up to 10 mW at distances up to 5 m. The systems operate at high efficiencies (over 80% end-to-end efficiency), while operating through variable vertical offsets, separation distances and angular misalignments.