Integrated and Distributed Power Generation

摘要

In most of the situation the load demand of any particular region varies during the time of the day. The load increases at particular time in the morning and evening ( Peak Load )which affects the efficient operation of power generating equipment i.e. Power Plant hooked up to the grid. Generally the large capacity Power generating equipment are designed to operate at its best efficiency between 90% to 100% load and there is a sharp decrease if the load goes down. This is more pertinent on mid-size Gas turbine plants operated on CCGT design. In many cases like in Thailand SPP segment where power generating station is located close to the Industrial zone, steam is also supplied from Power generating station by utilizing the waste heat. In these situation a hybrid solution works out to be the most effective utilizing the best efficiency of the generating equipment at all load regimes. Daily, weekly as well as seasonal patterns in electricity demand differ from country to country. That is one of the reasons that different countries have different generation portfolios. Its almost impossible for any country to produce all their electricity with one mode. So countries use coal, natural gas , nuclear , hydro or other resources based on their availability. Natural Gas is generally most sought after fuel for power stations due to its cleanliness and easy handling. Following is a brief study of variation of load pattern of some of the Asian countries.