Nhưng như đã nói trước đó khoảng MW đã trở thành khai thác bởi sự chuyển đổi của thế kỷ 20 này tiềm năng rất lớn cho một loạt các lý do kinh tế và kỹ thuật. Mini Hydel: nhà điện nhỏ công suất kW 50-500 có ý nghĩa to lớn cho các thị trấn ở các khu vực xa đồi núi của các nước đang phát triển, | nation mostly in the northern regions of Pakistan. But as stated earlier about 8 000 has become exploitable by the turn of the 20th century out of this huge potential for a variety of economic and technical reasons. Mini Hydel Small power houses of 50-500 kW capacity are of great significance for towns in the far away hilly areas of the developing countries where it is not easy or economical to take the National Electricity Grid but where sizable streams or rivulets provide hydel potential of upto 1 Megawatt 1 000 kW at each site. The construction of medium-size 100 to 1000 kW hydro-electric dams at places such as Khapalu Skardu Bunji Chilas Kalabagh Chashma Panjar Kohala Naran Kunhar Kalam posses vast potential even as high as 30 000 of hydro-electric energygeneration. For example a dozen such sites have so far been exploited by the Pakistan Government and generators in various multiples of 50 and 100 kW have been installed for domestic and small industries at Chitral Gilgit Natar Chalt Baltit Skardu etc. The generation-costs with these so-called mini-hydel plants are of course greater than those for large hydro-electric power stations by a factor of 3 to 5 because of increased capital costs per kW installed but this is more or less offset by the relatively lower costs of transmission lines in the case of units of 50 to 200kW provided the organization is run on an efficient cooperative basis. Figure 12 Outer casing of 25 kVA Bank Turbine manufactured in Lahore Pakistan - 27 - Micro Hydropower - Recent Experience in Pakistan The small hydropower plant is one alternative that has emerged as a desirable option specially for hilly terrain where natural and manageable waterfalls are abundantly available. There is a tremendous potential for exploiting these abundantly available waterfalls in the Northern Areas of the country. A number of perennial stream falls with reasonably sustained discharge over the year are present in the NWFP Baluchistan and Azad Kashmir.
