Emergency scheduling method for reinforcing electric network transportation ability

Abstract

The invention relates to an emergency dispatching method of increasing the power grid transmission capacity, belonging to the electric power system dispatching automation field. Firstly, an extremity transfer capacity of a main transmission section of a power grid is scanned online, so as to gain a transmission margin; secondly, a load increment of future time is calculated via ultra-short term load forecasting to determine a total power generation adjustment quantity of the power grid of the future time; then, an output adjustment quantity of a generator of next period according to the number of the transmission section whose the transmission margin is less than a setting value and the difference of the kinds of restrictive factors of each transmission section, when the power grid is provided with: the transmission margin of one transmission section is less than the setting value and is a static security constraint; the transmission margins of a plurality of transmission sections are less than the setting value and are the static security constraint; the transmission margin of one transmission section is less than the setting value and is a transient stability constraint. The method of the invention can improve the transmission capacity of the transmission section when the transmission margin of the main transmission section of the power grid is insufficient, so as to reduce or avoid the phenomenon of the restriction of electricity.

Description

technical field [0001] The invention relates to an emergency dispatching method for enhancing the transmission capacity of a power grid, in particular to an emergency dispatching method for enhancing the transmission capacity of a power grid considering static security constraints and transient stability constraints, and belongs to the technical field of power system dispatching automation. Background technique [0002] In the power system, the load center (such as Beijing) is often far away from the power generation gathering area (such as Shanxi). At this time, it is often necessary to use a transmission section composed of multiple transmission lines to transmit power to the load center. The ultimate transmission capacity refers to the maximum power that can be transmitted by the transmission section under the condition of satisfying various security constraints of the power system, and it is an important indicator of the security of the power grid. In the actual power gr...

AI Technical Summary

Problems solved by technology

Among them, the static safety problem refers to the power limit of some lines after the failure of the fault concentration occurs, and the transient stability refers to the fact that after the power system fails, some generators cannot keep running synchronously with other generators, which will eventually lead to the collapse of the power grid.

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