You can see the change just by looking at the amount of planned and operating solar generation in the United States. In the 15-plus years after the last units of the Solar Electric Generating Systems (SEGS) facility in California came online in 1990, no central station solar plants were built in the country. The solar generation industry had flat-lined. In 2006, however, Arizona Public Service dedicated a 1-megawatt (mw) facility using parabolic trough technology to concentrate the sun's rays and generate electricity. The next year, Ac-ciona North America, a unit of Spain's Acciona Group, built a 64-MW concentrating solar power plant in Nevada City, NV. And that, seemingly, opened the window-according to Edison Electric Institute (eei), by mid-March this year, the power sector as a whole had installed 468 mw of solar thermal capacity and 146 mw of photovoltaic (PV) capacity.
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机译：您只需查看美国计划和运营的太阳能发电量即可看到变化。在1990年加利福尼亚州的太阳能发电系统（SEGS）的最后一批机组上线后的15多年中，该国没有建造中央电站太阳能发电厂。太阳能发电行业表现平平。但是，在2006年，亚利桑那州公共服务局使用抛物线槽技术专门建造了一个1兆瓦（mw）的设施，以聚集太阳光线并发电。第二年，西班牙Acciona集团旗下子公司Ac-ciona North America在内华达州内华达市建造了64兆瓦的聚光太阳能发电厂。而且，据爱迪生电气学院（eei）看来，这似乎打开了窗户，到今年3月中旬，整个电力部门已经安装了468兆瓦的太阳能热容量和146兆瓦的光伏（PV）容量。
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