Dựa trên kinh điển của William Stevenson, yếu tố phân tích hệ thống điện, văn bản này cao cấp / sau đại học cung cấp một bản cập nhật hoàn toàn hiện đại của sách giáo khoa phổ biến. Bao gồm các chủ đề như năng lượng dòng chảy ổn định hệ thống điện, đường dây tải điện, cuốn sách dạy các chủ đề cơ bản của phân tích hệ thống điện đi kèm với các cuộc thảo luận hợp lý và rất nhiều ví dụ | CHAPTER 1 THE POWER SYSTEM AN OVERVIEW INTRODUCTION Electric energy IS the most popular form of energy because It can be transported easily at high efficiency and reasonable cost. The first eiectnc network in the United States was established in 1882 at the Pearl Street Station in New York City by Thomas Edison. The station supplied de power for lighting the lower Manhattan area. The power was generated by de generators and distributed by underground cables in the same yearthe first waterwheel driven generator was installed in Appleton Wisconsin. Within a few years many companies were established producing energy for lighting - all operated under Edison s patents. Because of the excessive power loss RỈ2 at low voltage Edison s companies could deliver energy only a short distance from their stations. With the invention of the transformer William Stanley 1885 to raise the level of ac voltage for transmission and distribution and the invention of the induction motor Nikola Tesla 1888 to replace the de motors the advantages of the ac system became apparent and made the ac system prevalent. Another advantage of system is that due to lack of commutators in the ac generators more power can be produced conveniently at higher voltages. 2 . THE POWER SYSTEM AN OVERVIEW The first single-phase ac system in the United States was at Oregon City where power was generated by two 300 hp waterwheel turbines and transmitted at 4 kV to Portland. Southern California Edison Company installed the first three-phase system at kV in 1893. Many electric companies were developed throughout the country. In the beginning individual companies were operating at different frequencies anywhere from 25 Hz to 133 Hz. But as the need for interconnection and parallel operation became evident a standard frequency of 60 Hz was adopted throughout the . and Canada. Most European countries selected the 50-Hz system. Transmission voltages have since risen steadily and the extra high voltage
