活动坝发电站水轮机组的管理与改进

1 概况 活动坝水力发电站位于淮安市淮沭新河东侧废黄河杨庄闸北首赵越河上,建于1976年11月,1980年1月并网发电。电站最高设计水位15.5m,最低水位10.50m,正常发电水位11.8m,下游最高水位13.0m,最低水位6.5m,正常尾水位8.3m,设计净水头3.5m;共装ZD-LM-120型水轮机和TSN-6-160型发电机12台,总装机容量1920kW。该站属于低水头、大流量、径流式水电站,利用淮安、盐城部分地区灌溉、生活用水和汛期上游分洪排水综合利用发电。     

Detecting hydrosonic signal using a polarization technique

Some optical fiber hydrophones, such as PGC Mach-Zehnder Interferometer, have a birefringence of single mode optical fibers which induce signal fading. Especially, if two optical beams from the optical arms are orthogonal, the interferomic signal can‘t be detected at all. Here a new method is introduced. This is to translate the detected phase difference into a linearly polarized angle, then detect it, so that polarization inducing signal fading will be avoided. In theory, this problem is solved. Furthermore, the effect on measurement results from optical source fluctuation becomes little when using the polarization technique.