Thermal power load shedding peak shaving method based on load reconstruction strategy

Abstract

The present invention relates to the power grid dispatching running field, and discloses a thermal power load shedding peak shaving method based on a load reconstruction strategy. According to the method of the present invention, the coupling constraint and load depth adjusting demands at the complex time intervals can be both considered, the deep peak shaving of the large-capacity and efficient thermal power units can be realized, and the peak shaving difficulty of a power grid is relieved. The technical scheme of the present invention is that the facing load process of the units is reconstructed via the steps of trend simulation, geometric scaling and climbing correction, a direct and available system load can be provided to a load shedding algorithm, and during the load shedding process and according to the output combined mode of the adjacent days and a plan day, the output of a part of connection time intervals is corrected dynamically, thereby guaranteeing that the output process satisfies the control constraint and demands of the units after connection. The beneficial effects of the present invention are that: the disadvantage that the thermal power peak shaving capacity is poor on the complex constraint and demand conditions is overcome, the peak shaving effects of the thermal power units are given full play, and the thermal power load shedding peak shaving method based on the load reconstruction strategy has important popularization and usage values for the power grid focusing on the thermal power.

Description

technical field [0001] The invention relates to the field of power grid dispatching operation, in particular to a thermal power shedding load peak-shaving method based on a load reconfiguration strategy. technical background [0002] The power structure of most power grids in my country is dominated by coal-fired thermal power units, and the proportion of high-quality peak-shaving power sources such as conventional hydropower and pumped storage is relatively small. Most of the power grids in China, such as North China, East China, Northeast and other regional power grids and provincial (city) level power grids, are in this situation. The peak shaving problem has seriously affected the safe, stable, high-quality and economical operation of these power grids. In order to solve the problem of power grid peak regulation, an effective measure commonly used at present is to use some large-capacity and high-efficiency thermal power units in the power grid to carry out deep peak regu...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on thermal power peak shaving algorithms and strategies has been reported in the literature, such as successive load shedding method and hierarchical peak shaving method, etc. However, when these methods solve the short-term thermal power peak shaving problem, it is often difficult to effectively deal with the following three problems at the same time : 1) Violation of time-period coupling constraints, such as output ramping constraints and output fluctuation control constraints; 2) The ability to track system load changes is weak, and the unit’s peak-shaving capability cannot be fully utilized; 3) The planned output of the previous day is not considered, that is, relative The output during the connecting period between adjacent days violates the control constraints or demands of the unit

Images