Method for calculating interactive-influenced electricity transmission limit with multiple sections and stable transmission level

Abstract

The invention belongs to the technical field of electrical power systems and automation thereof, and provides a method for calculating interactive-influenced electricity transmission limit with multiple sections and a stable transmission level. The invention can be applied to the safe and stable off-line analysis calculation, real-time early warning and on-line auxiliary decision making of the electrical power systems. The method comprises the following steps of: firstly, determining electricity transmission section collection to be inspected; secondly, appointing one anticipated fault scene for each electricity transmission section; thirdly, taking one tidal current of the ground state of the electrical power system; fourthly, carrying out time domain simulation on each anticipated fault scene according to the tidal current of the ground state, the model and the parameters of the electrical power system, and calculating a system stability margin led by each section by adopting EEAC (Extended Equal Area Criterion) based on the simulation track; fifthly, stopping the calculation if the stable transmission level achieves the ultimate set value of the number of the transmission sections; and sixthly, perturbing the power of the section gradually in the mode of adjusting the running mode of the system to form a new tidal current of the electrical power system, and forming the perturbation matrix of the power of the section.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a calculation method for power transmission limit interactively influenced by multi-section stable transmission levels. Background technique [0002] The transmission power level of the transmission section must meet the safety and stability requirements of the power grid under the expected fault scenario. After the key failure that limits the transmission capacity of the section occurs, the power grid can still continue to operate safely and stably. The maximum power is the transmission limit of the section. [0003] There are multiple transmission sections in the large-scale interconnected power grid, and the stable transmission level of each section is not only closely related to the transmission power of this section, but also affected by the transmission power of other sections. Quantitatively evaluating the inte...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no systematic method for the quantitative evaluation and limit calculation of the interactive effects of multi-section stable transmission levels, and it often relies on the calculation experience of system analysts. It is becoming more and more complex, and human experience is difficult to meet the requirements of analysis, calculation automation and intelligent operation monitoring

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