DAILY ELECTRICITY GENERATION PLAN MAKING METHOD OF CASCADE HYDRAULIC POWER PLANT GROUP

摘要

A daily electricity generation planning method of a cascade hydropower plants is disclosed, and the method is comprised of the steps as follows: step 1, regardless of the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as one of optimization objectives, and performing a first optimization to obtain a daily electricity generation plan; step 2, according to the derived daily electricity generation plan, determining an opening and closing status for the generator; and step 3, considering the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as the optimization objective, performing a second optimization to obtain the daily electricity generation plan.

主权项

1. A daily electricity generation planning method of cascade hydropower plants, comprising the following steps of:
Step 1: analyzing historical data of daily loads of each hydropower plant and selecting typical load curves for each hydropower plant; Step 2: taking a degree of similarity between a power load of the hydropower plants and a typical daily load of the power plants being closest as one of the optimization goals without considering constraints for opening and closing state of the generators of the hydropower plants, and performing a first optimization to obtain a daily electricity generation plan of the cascade hydropower plants by using reservoir operation methods; Step 3: according to the daily electricity generation plans of each hydropower plant derived from Step 2, the opening and closing state of each generator set are protocoled, which includes opening and closing state order and number of each generator; and Step 4: increasing the constraints of the opening and closing state of each generator set, and performing a second optimization to obtain the daily electricity generation plan of each plant by using reservoir operation methods with the same objective as illustrated in Step 2.