Medium and long term unit commitment accurate modeling technical method comprehensively considering complex large power grid operation constraint conditions

Abstract

The invention belongs to the technical field of power grid systems, and particularly relates to a medium and long term unit combination accurate modeling technical method comprehensively considering complex large power grid operation constraint conditions, which comprises the following steps: establishing a medium and long term bus load prediction tool considering renewable energy output, including: restoring renewable energy associated bus load sample data; performing medium and long term bus load prediction considering renewable energy data correction; performing medium and long term bus load prediction considering equipment maintenance plan correction; and establishing a medium and long term unit combination and power generation plan compilation tool for promoting renewable energy consumption, wherein the medium and long term unit combination and power generation plan compilation tool comprises a medium and long term unit combination and a power generation plan optimization calculation function module. According to the method, the calculation dimension of the problem model is reduced by considering the aspects of model description, calculation time period, effective integer variable pre-recognition, effective security constraint pre-recognition and the like through the physical characteristics of an actual system, the solving efficiency is greatly improved on the premise of not losing the solving precision, and the engineering application of a medium-and-long-term unit commitment algorithm is realized.

Description

technical field [0001] The invention relates to the technical field of power grid systems, and specifically relates to a medium- and long-term unit combination accurate modeling technical method that comprehensively considers the operating constraints of a complex large power grid. Background technique [0002] In recent years, with the continuous acceleration of China's electric power development, China's power grid has also developed rapidly, the operating voltage level of the power grid system has continued to increase, and the network scale has also continued to expand. The whole composed of lines includes three units of transformation, transmission and distribution. The task of the power network is to transmit and distribute electric energy and change the voltage. [0003] The existing medium- and long-term unit combination is the calculation core of the medium- and long-term dispatching operation mode of the Southern Power Grid. It has the characteristics of long calcu...

AI Technical Summary

Problems solved by technology

[0003] The existing medium- and long-term unit combination is the calculation core of the medium- and long-term dispatching operation mode of the Southern Power Grid. It has the characteristics of long calculation period, multiple time periods, many discrete variables for unit start-up and stop, and complex safety control section constraints. The calculation scale of the optimization model is large and directly Solving the full-time, full-variable, and full-constraint model basically cannot complete the optimization calculation in a short time, which is time-consuming