We need these interconnections because,apart from delivery,the purpose ofthe transmission network is to pool power plants and load centers in order to minimizethe total power generation capacity and fuel cost.Transmission interconnections enabletaking advantage of diversity of loads,availability of sources,and fuel price in orderto supply electricity to the loads at minimum cost with a required reliability.In general,if a power delivery system was made up of radial lines from individual local generatorswithout being part of a grid system,many more generation resources would be neededto servethe load with the same reliability, and the cost of electricity would be muchhigher.With that perspective,transmissionis often an alternative to a new generationresource. Less transmission capability means that more generation resources wouldbe required regardless of whether the system is made up of large or small powerplants.In fact small distributed generation becomes more economically viable if thereis a backbone of a transmission grid.One can not be really sure about what the optimumbalance is between generation and transmission unless the system planners use advanced methods of analysis which integrate transmission planning into an integratedvalue-based transmission/generation planning scenario.The cost of transmission linesand losses, as well as difficulties encountered in building newtransmission lines, wouldthường giới hạn khả năng truyền tải có sẵn. Có vẻ như rằng có nhiều trường hợpnơi kinh tế năng lượng hoặc dự trữ chia sẻ được cố định bởi khả năng truyền tải,và tình hình không nhận được bất kỳ tốt hơn.Trong một môi trường deregulated dịch vụ điện,một lưới điện hiệu quả là rất quan trọng cho môi trường cạnh tranh đáng tin cậy điệnDịch vụ.1
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