首页
登录
职称英语
Widespread adoption of plug-in electric vehicles could dramatically cut gree
Widespread adoption of plug-in electric vehicles could dramatically cut gree
游客
2024-04-12
6
管理
问题
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on foreign oil. But results of an electric-car pilot project presented recently at the annual meeting of the American Association for the Advancement of Science provide added incentive to go electric: Car owners could return unused electricity back to the grid(输电网)and make real money while doing it.
Electric cars need big, powerful batteries to accelerate to highway speeds and travel scores or even several hundred kilometers on a single charge. But because most drivers drive just a few dozen kilometers a day, most of that battery capacity sits unused. To take advantage of that storage capacity, Willett Kempton, director of the University of Delaware’s Center for Carbon-Free Power Integration in Lewes, teamed up with an electric car maker, several utilities, a software company, and PJM Interconnection, one of 10 regional organizations that coordinate and control the U.S. electrical grid.
To ensure that electricity flows steadily and without interruption, the U.S. government requires PJM Interconnection and its counterparts to have reserves of power in case a generator goes down and other electrical reserves to maintain the 60-Hz frequency of alternating current that our appliances and devices are accustomed to dealing with. Today, PJM Interconnection and its counterparts pay conventional power plants to maintain this reserve power. But as renewable energy sources such as wind and solar, which provide energy cleanly but intermittently, come online, these grid operators need to increase their storage capacity to ensure a steady electricity supply. So Kempton and his colleagues set out to provide some of the backup power from a fleet of parked electric cars.
Kempton’s team used an electric car from AC Propulsions, a California car company, which was custom-built to provide electricity back to the grid. They used commercially available software and hardware that companies such as PJM Interconnection use to monitor and control energy flow. In November, the company hooked the grid up to the car, and Kempton’s team’s electric car became the first car in the world to earn its keep as a backup electric power source. At the rates that PJM Interconnection pays today to maintain power reserves, a hooked-in electric car could generate $1,800 a year for its owner.
"I think it’s tremendously exciting," says Kathryn Clay, director of research for the Alliance of Automobile Manufacturers. "The extra dollars an electric car provides will not be enough by themselves to get consumers to adopt grid-enabled vehicles—for that we also need better and less expensive batteries and tax incentives to give the market an encouragement" Nevertheless, "it’s an incentive to push in the right direction." [br] In order to maintain the 60-Hz frequency of alternating current, PJM Interconnection must _____.
选项
A、have reserves of power
B、have other electric reserves
C、ensure the steady flow of electricity
D、ensure the operation of generators
答案
B
解析
从原文该句可以知道为了维持60赫兹的交流电频率,PJM Interconnection必须have other electricalreserves,因此,本题应选B。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3551796.html
相关试题推荐
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
Technology,Costs,LackofAppealSlowE-TextbookAdoption[A]Textbo
Technology,Costs,LackofAppealSlowE-TextbookAdoption[A]Textbo
Technology,Costs,LackofAppealSlowE-TextbookAdoption[A]Textbo
随机试题
强国giant;powerfulcountry;power
《国家政务信息化项目建设管理办法》由()开始施行。A.2019年12月30日
根据《房屋建筑与装饰工程量计量规范》GB50854-2013,关于现浇混凝土柱高
企业弥补亏损的渠道主要有( )。A.用资本公积弥补 B.用以后年度税前利润弥
资产负债管理最根本的内涵为()。A.流动性风险的管理 B.商业银行稳健发展
Thechangeinthatvillagewasmiraculou
关于FIDIC合同中指定分包商的说法,正确的是()A:指定分包商可由工程师选定
某患者,车祸后诊断为腹部闭合性损伤,伴休克,腹穿抽出不凝固血液。应采取的治疗原则
某建设工程项目经理部根据目标动态控制原理,将项目目标进行了分解,那么在项目目标实
依据《道路交通安全法》的规定,在道路上发生交通事故,车辆驾驶人应当()。A.立
最新回复
(
0
)