Power grid robustness planning method for considering safety verification in uncertain environment

Abstract

The invention discloses a power grid robustness planning method for considering safety verification in an uncertain environment. The method comprises the steps of inputting power grid information, and establishing a power grid robustness planning model in consideration of safety verification in the uncertain environment; secondly, utilizing a Benders decomposition method, decomposing the power grid robustness planning model to solving of a planning main problem and an operating sub problem; then, solving the planning main problem, and obtaining a power grid robustness planning scheme; solving an operation sub-problem in a normal state and an operation sub-problem in an emergency state; and finally, verifying feasibility of the operation sub-problem, and obtaining a final power grid robustness planning scheme. The power grid robustness planning method has advantages of settling various defects in prior art, considering uncertainty of an N-K safety verification condition and load requirement and renewable energy power generation, and realizing high suitability for all possible realizations of uncertain variables which are defined by the uncertainties in a normal state and the emergency state.

Description

technical field [0001] The invention belongs to the technical field of transmission network planning, and in particular relates to a robust planning method for a power network considering safety verification in an uncertain environment. Background technique [0002] As the load demand and power generation increase year by year, the transmission line network needs to be expanded and strengthened to meet the increasing demand for transmission capacity and ensure the safe operation of the system. Grid Robustness Planning (TEP) is the problem of determining when and where to strengthen existing lines or build new ones to provide sufficient transmission capacity and to meet relative reliability standards. [0003] The ability of power system to withstand accidents is a very important aspect of power system reliability. According to grid planning standards (TPL-004-0[1]) defined by Nortel Reliability Corporation (NERC), if only one component fails (“N-1” emergency), the system sh...

AI Technical Summary

Problems solved by technology

Some literatures consider the TEP problem of safety verification, but they all have a big limitation: all emergencies are explicitly modeled in the formula, so a lot of computational work needs to be done enumeratively to check each an emergency

However, the relevant literature does not take the “N-K” safety check case into consideration, and some literatures only examine the “N-1” safety check case under two given scenarios: minimum / maximum wind power generation and maximum load demand

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