Study On Daily Inter-regional Tie-line Generation Schedule Management System In Northeast China Power Grid

Power grids joint operation with great economic and social benefits, is an inevitable trend of electric power industry. The preparation of inter-regional tie-line generation schedule is the basis to achieve economic and security operation for an interconnected power system, and it is a necessary means to develop a daily tie-line generation schedule management system.Two decomposition algorithms for daily inter-provincial tie-line generation schedule are proposed. One is based on the load curve for the whole power grid; while another is based on the load curve for the company which obtains electricity from others. The algorithms not only satisfy the basic principles of electricity consumption distribution among different provinces for Northeast China Power Grid, but also take into account differences in load characteristics of various provinces, especially the latter method can give full play to the provinces of peak load effect, to maximize the use of the whole power grid peaking power generation capacity to ensure the economic operation of the thermal power stations. A new integral algorithm for hydropower to counteract peak load is adopted, which can not only avoid the frequent adjusting of thermal power, but also reduce water consumption rate of hydropower, and enhance the economy of the schedule. The checking module for the main tie-line transmission capacity is considered in developing the lie-line generation schedule, which can ensure the power system security and stability.Furthermore, a new daily tie-line generation schedule management software system is developed. The software can easily work out a reasonable and feasible daily tie-line generation schedule, with a good practicality.