
220千伏天河棠下柔直背靠背工程建设中,攻克电力立交、设备上楼、降噪等难关。
“十五五”期间我国将投入超5万亿元建设新型电网。世界最大容量柔性直流变压器日前在广州220千伏天河棠下柔直背靠背工程现场就位,该工程攻克多项技术难题,全面实现国产化,将提升广州核心片区供电能力。
AI-generated summary
“十五五”时期我国将投入超过5万亿元建设新型电网,持续推进电力基础设施升级。
“十五五”时期,我国将投入超过5万亿元建设新型电网。新型电网怎么建?要攻克哪些技术难题?就在几天前,一台世界最大容量的柔性直流变压器在广州城市中心就位。
世界最大容量“电力心脏”
假日施工不停歇
总台记者赵菁:我在位于广州的220千伏天河棠下柔直背靠背工程的施工现场。工人们正在安装的白色“大家伙”就是前几天刚就位的世界最大容量柔性直流变压器,也是整个工程的“心脏”。它的容量有770兆伏安,换算一下,就是它能同时带动约10万辆电动汽车一起慢充。国庆假期期间,这里依然有450多名建设者在现场轮班作业。
攻坚要经历哪些难关?
攻坚第一道难关
“电力立交”串起三大片区
为什么要在广州建这个工程?上图显示的是广州核心的三大供电片区:木棉片区、增城片区、广南片区。以前这三个片区互相供电调节的能力较弱。把这三个片区想象成三个蓄水池,假如木棉片区缺水,就要立刻从其他两个片区调水,需要打开多个阀门,形成水位差,这样才能调节水流支持木棉片区。在调节过程中,可能会耗时长,还有可能因调节不及时造成木棉片区大量断电,所以在广州急需一个能灵活调节的总阀门。
怎么实现三个片区灵活调控?核心是柔性直流技术,这相当于在三个蓄水池之间新建一个“智能水闸+双向泵站”控制器。一旦遇到某个区域缺水,这个装置就能在毫秒时间内把另外两个片区的水及时送过来进行支援。如果遇到水流量过大的情况,阀门还会立刻关闭,避免影响周边区域。
攻坚第二道难关
“总阀门”放在哪最合适?
这项工程地处广州市中心,与广州三大供电片区距离均等是最佳位置。但这里寸土寸金,所以建设团队创新采用设备上楼模式,整座换流站高49米,成为国内最高的陆上柔性直流换流站。工程完工后,新增供电能力可满足约35万户居民用电需求。
攻坚第三道难关
让“电力心脏”安静下来
变压器运行时,会产生100到400赫兹的特殊噪声,针对这个难题,研发团队专门研制了一种降噪装置。
图中这块盖板表面布满孔洞,把它贴在变压器四周的墙壁上,声波进去后,反复共振、相互抵消,从而减少噪声。据测算,这个装置能将变压器的噪声降低80%到90%。
从用上电到用好电、用绿电
这项工程从核心部件到配套装置全部实现国产化,能让老百姓从用上电,迈向用好电、用绿电。未来,变电站、北斗基站、储能站等都集中在这里,建成国内最大的“多站合一”园区,这里将以新型电网建设促进“六张网”协同发展。
AI outlook — possibilities, not facts
工程完工后将新增供电能力满足约35万户居民用电需求
Very likely · Within months

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