Robust optimization evaluation method for reference power grid considering load uncertainty

Abstract

The invention provides a robustness optimization evaluating method for a reference power grid considering the load uncertainty. The method comprises the following steps: giving the parameters to a current state power grid; forwardly prospecting the load prediction interval values for all periods in a time scale and the planned network candidate branch schemes for the coming years; according to the relationship between the reactance of the system branches and the node branches, forming a system node injection transfer factor matrix; considering the response mechanism of the system to the uncertainty, forming a system power transfer distribution factor matrix under the guidance of the generator participation factors; expressing the uncertainty amount of the interval load in the form of affine arithmetic; constructing an optimal model; processing the interval form constraint in the optimal model and transforming it into a linear programming model; and using the linear programming method to solve the optimal model to obtain the final transmission line capacity value. The method of the invention is capable of considering the actual condition of a current state power grid, which increases the accuracy for planning decisions and realizing the professional and refined management for power grid development.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a robust optimization evaluation method for a reference power grid considering load uncertainty. Background technique [0002] Under the new situation, with the improvement of the living standard of the national economy, the load in the power system is diversified and developed, its volatility is increasing day by day, and the law of change is becoming more and more difficult to grasp. How to evaluate and quantify the characteristics of the power grid under the consideration of load uncertainty It is of great significance to guide the grid planning. [0003] The reference grid provides a set of criteria against which existing networks can be objectively assessed. By quantifying the optimal investment cost and optimal congestion cost of the reference network, it can be compared with the investment and congestion cost of the existing network. By comparing the individual line ...

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Problems solved by technology

The Chinese patent with the patent application number 201510333979.9: "Reference grid model and solution method for power system evaluation and progressive planning" discloses a reference grid model and solution method for power system assessment and progressive planning. Its core focus is The solution to the active power optimization power flow problem of large-scale systems under the condition of DC power flow, but it is carried out under the deterministic load level, does not consider the current power grid situation, has certain limitations, and it is difficult to clarify the investment direction of power grid planning

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