Optimization method and system for day-ahead market yield decision operation plan of thermal power plant

Abstract

Embodiments of the invention disclose an optimization method and system for a day-ahead market yield decision operation plan of a thermal power plant. The thermal power plant is internally provided with multiple types of transformed thermoelectric units and electric thermal decoupling equipment. The method comprises the steps: S1, acquiring a predicted price of a next-day spot market and requiredpredicted thermal load, and acquiring the system parameters of the thermal power plant; S2, establishing an optimal scheduling model of a next-day operation plan of a day-ahead spot market corresponding to the thermal power plant, and giving constraint conditions; and S3, based on the optimal scheduling model, determining the whole grid-connected power plan of the thermal power plant per hour of the next day, and an operation plan of the multiple types of units, electric boilers and heat storage tanks in the plant. The method can conveniently and efficiently help a power generator to calculatethe whole grid-connected power generation plan of the thermal power plant on the next day and the operation plan of multiple types of units, electric boilers and heat storage tanks in the plant, anda feasible operation plan scheme is provided for the thermal power plant to participate in the day-ahead market.

Description

technical field [0001] The invention relates to the technical field of electric power system dispatching, in particular to a method and system for optimizing an operation plan of a day-ahead market output decision of a thermal power plant. Background technique [0002] At present, my country is actively promoting the construction of the electricity spot market, and the first batch of eight pilot electricity spot markets in China have successively carried out settlement trials. Judging from the eight pilot projects, the day-to-day spot market basically adopts the model of full power declaration and centralized optimization of clearing. In the day-ahead market that adopts this model, the power plant’s power generation plan curve for the next day is determined by the market trading center based on the quotations of all power plants in the day-ahead spot market, aiming at the lowest power purchase cost or the greatest social benefit, with the lowest price as the priority. The p...

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Problems solved by technology

However, there are many problems in the existing methods: Generally, only a single condensing unit in a thermal power plant is considered; however, as the country promotes the flexibility transformation of thermal power, some thermal power plants will transform part of the condensing units in the plant into low-pressure cylinders. The condensate extraction unit or the back extraction unit can be removed flexibly, and it is further equipped with an electric boiler and a heat storage tank

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