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
2023-08-14
44
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 electrical reserves,因此,本题应选B。
转载请注明原文地址:https://tihaiku.com/zcyy/2925697.html
相关试题推荐
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
[originaltext](9)Ourelectriccaristhewayofthefuture.Automobileman
[originaltext](9)Ourelectriccaristhewayofthefuture.Automobileman
[originaltext]W:Withusnow,isMalcolmBricklin,CEOofVisionaryVehicles.M
随机试题
[originaltext]M:Hi,Mary,Doyouwanttostartwritingalabreportafterwef
Thispassageismainlyaboutthebenefitsofdevelopingrobotsandhowpeoplear
A.0 B.2.5A C.0.24A D.0.2A
在1-1剖面图上看到的水平栏杆和剖到的水平栏杆各有几段?() A.3
下列病变,可见肝脏肿大、压痛明显的是A.肝囊肿 B.肝癌 C.肝硬化
下列错误论述中成药的是A.标明功能主治、用法用量和规格 B.有特有的名称 C
输液的成分是A、2、1含钠液20ml/kg B、20%甘露醇5ml/kg C
在这个收视率下降的年代,一部电视专题片却引起了“全民追剧”的热潮。对于中央纪委宣
假设丁公司每年所需的原材料为80000千克,单位成本为15元/千克。每次订货的变
关于无效合同法律后果的说法,正确的是()。A.无效合同自被确认无效时起没有法律约
最新回复
(
0
)