农村水电管理知识百问

章节摘录

版权页：137.How to guarantee the safety for adjustment of ac-tive／reactive power if the rural power station with low-voltage unit has no automatic excitation regulator？For the low-voltage unit with no automatic excitation regu- lator and speed governor，all the load of the lOkV line will be diverted to the unit once the line is out of power supply，and o- ver current is caused to the generator.Therefore，the over-cur- rent protection of the generator should be functioning in time to shut it down by tripping.First，Regulation of reactive power.The regulation of excitation before grid connection should be gradually increased，if over regulated，the generator termi- nals will have over voltage.For regulation of excitation after grid connection，the reac- tive power increases with the exciting current，and decreases when the exciting current decreases.If the exciting current is regulated to be too low，the generator will be under phase ad- vance operation，and the power factor is a negative value at the time.Generally，phase advance operation is not allowed for the generator.Under the phase advance operation，current of the stator should be kept a close eye on.Otherwise，if the current is overlooked after grid connection with reactive power，it will cause the following two situations：（1）Decrease of reactive load of the grid will cause rise of the voltage，partial exciting current of the generator preliminary for reactive power will be used for producing of terminal volt- age.The reactive power of the unit decreases automatically and the power factor increases.

书籍目录

Chapter One Water Power Resources Management
Chapter Three Operation and Management of Rural Hydro Power
Station Reservoir
Chapter Four Safety Management of Rural Hydro Power
Chapter Five Rural Hydro Power Equipment
Management
Chapter Six Emergency Management for Rural Hydro Power
Stations
References

编辑推荐

《农村水电管理知识百问》：Based on existing rural hydropower managementstandards and regulations，this book gives detailedanswers to water resources management，rural hydropower project tax management，rural hydro powerequipment management and rural hydro power stationemergency management.This book could be taken as suitable references tothe administrative officials in water management，engineering and technical personnel，and other ruralhydro power operators in electrical and mechanicalmanagement.

作者简介

《农村水电管理知识百问》内容简介：浙江省具有较丰富的水电资源。新中国成立以来，全省农村水电从无到有，从小到大，走过了五十多年的发展历程，截至2008年底，已建成投产农村水电站3200余座、总装机容量近340万千瓦，为提供清洁电力能源、防洪减灾、增加地方财政收入、改善农村基础设施等发挥了显著成效，为加快山区农村经济社会发展做出了巨大贡献。在新的历史时期，党中央高度重视“三农”工作，大力推进资源节约型、环境友好型社会建设，农村水电作为可再生能源工程和农村、农业的基础设施，又迎来了新的发展机遇和广阔的发展空间。

---

 农村水电管理知识百问下载

---