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“白鹤”亮“翅”,带来哪些看点?

2017-08-04 07:48:56   中国青年网

□本报记者 李欣忆

8月3日,川滇交界的金沙江畔,白鹤滩水电站主体工程开始全面建设。作为全球第二大水电站,逐渐亮相的白鹤滩水电站有哪些独特的亮点?

看建设难度多项世界级技术难题待攻克

单机容量100万千瓦居世界第一,圆筒式尾水调压井规模世界第一,地下洞室群规模世界第一,300米级高坝抗震参数世界第一,无压泄洪洞群规模世界第一,首次在300米级高拱坝全坝使用低热水泥混凝土……六个“世界第一”的背后,白鹤滩水电站工程建设有多个世界级技术难题待攻克。

坝基地质稳定就是一个世界级难题。白鹤滩水电站地质独特,开挖后容易松弛、崩落。脆弱的地质条件下,如何实现坝基的稳定?经过无数次研究论证,由三峡集团牵头,设计、科研、施工、监理单位共同合作,采用综合处理措施,有效地解决了这一难题。

地下洞室群的开 挖也是难点。其地下洞室群总里程217公里,相当于北京到天津距离的1.7倍。开挖量2500万立方米,相当于1万个标准游泳池大小。

看水电制造百万千瓦机组刷新单机纪录

白鹤滩水电站还有很多工程技术指标是“世界第一”。左右岸将各布置8台100万千瓦水轮发电机组,为当前世界最大单机容量。东方电气集团已确定制造安装左岸8台百万千瓦机组。

在三峡电站之前,国内厂商尚不具备制造35万千瓦以上水电机组的能力,70万千瓦水电机组更是为少数国外厂商掌握。直到三峡工程70万千瓦水电机组国产化成功,我国水电重大装备制造跨入自主设计、制造巨型水电机组的新时代。

三峡集团机电工程局局长张成平介绍,溪洛渡和向家坝水电站实现了国产水电机组从77万千瓦到80万千瓦的跨越。溪洛渡水电站安装的18台机组中,有15台是拥有完全自主知识产权的国产机组;向家坝水电站安装的8台80万千瓦机组中,有4台是国产机组,是目前全世界已运行水电站中单机容量最大的水电机组。

从80万千瓦到100万千瓦,增加的不仅是容量,更需要高尖精的技术作支撑。东方电气集团相关负责人告诉记者,溪洛渡水电站右岸厂房全部9台机组均为“四川造”,单机容量77万千瓦的巨型混流式水轮发电机组,均为自主研发。白鹤滩水电站百万千瓦水电机组,则标志“四川造”水电机组达到的高度。

看联动效益“姐妹花”联手“再造一个三峡工程”

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