本发明公开了一种水电联产系统,所述系统包括：锅炉,所述锅炉对循环水进行加热,产生蒸汽；亚临界参数及以上发电机组,所述亚临界参数及以上发电机组接收所述锅炉产生的蒸汽进行做功产生第一电能,并产生第一抽汽和第一乏汽；背压发电机组,所述背压发电机组接收所述亚临界参数及以上发电机组产生的所述第一抽汽继续做功产生第二电能,产生第二乏汽；海水淡化单元,所述海水淡化单元接收所述第二乏汽,对所述第二乏汽进行淡化处理,输出冷凝水及部分淡化水供所述锅炉使用；电网,所述电网接收所述第一电能和所述第二电能。达到了利用蒸汽热能淡化海水,实现淡水自给自足,降低锅炉用水处理成本,实现水电联产、共生的技术效果。

The invention discloses a water and electricity cogeneration system, which comprises a boiler, which heats circulating water to generate steam; A generator set with sub-critical parameters and above, wherein the generator set with sub-critical parameters and above receives steam generated by the boiler to do work to generate first electric energy and generate first extraction steam and first exhaust steam; Back-pressure generator set, the back-pressure generator set receives the first extraction steam generated by the sub-critical parameter or above generator set and continues to do work to generate second electric energy and generate second exhaust steam; A seawater desalination unit receiving the second exhaust steam, desalinating the second exhaust steam, and outputting condensed water and part of desalinated water for use by the boiler; A power grid receiving the first electrical energy and the second electrical energy. It achieves the technical effects of desalination of seawater by steam heat energy, self-sufficiency of fresh water, reduction of boiler water treatment cost, and cogeneration and symbiosis of hydropower.