UPFC (Unified Power Flow Controller) installation position optimization method considering load and new energy randomness

Abstract

The invention discloses a UPFC (Unified Power Flow Controller) installation position optimization method considering load and new energy randomness. The UPFC installation position optimization method comprises the following steps: firstly, deducing an expression of power grid operation cost on a probability distribution sensitivity index of a control variable of a UPFC; then, establishing a UPFC-contained random optimal tidal current model which considers load, wind power and photovoltaic random variables; on the basis of an interior point method and a point estimation algorithm, realizing the calculation of the probability distribution sensitivity index; and on the basis of the sensitivity, selecting an optimal installation position of the UPFC. The UPFC installation position optimization method considering the load and new energy randomness has the meaning that the influence of the UPFC on the change of the probability distribution of power grid operation cost on different lines can be visually reflected, and the optimal installation potion of the UPFC is determined on the basis of the index. The method provides a new thought for fully performing the function of the UPFC on the safe and stable operation of the power grid and improving power grid economy.

Description

technical field [0001] The invention relates to a UPFC installation position optimization method considering load and new energy randomness, and belongs to the technical field of power system operation and control. Background technique [0002] As a new solution, FACTS brings unprecedented opportunities in controlling power grid flow, improving system stability and transmission capacity, and FACTS equipment is gradually added to the existing AC transmission system, and is developing in parallel with the current AC transmission system . Considering that the FACTS device can change the face of the power system in a gradual manner by using cost-effective high-power power electronics technology for the specific problems of the local power grid without major changes to the existing equipment, it has been widely recognized and quickly develop. [0003] The Unified Power Flow Controller (UPFC) is the third generation FACTS element and the most powerful and comprehensive thyristor...

AI Technical Summary

Problems solved by technology

[0004] For the actual power grid, it has the characteristics of large scale, complex structure, and variable operation mode. The impact of UPFC installed on different lines is also different, and the size of UPFC capacity also involves manufacturing and installation costs and economic benefits. Problems, such as improper selection of UPFC installation location will undoubtedly lead to waste of investment costs, limited adjustment capabilities, etc.

However, the existing UPFC installation location optimization methods all use deterministic methods, which ignore the inherent randomness in the power grid, such as loads, new energy power generation, N-1 faults, etc., which have a certain one-sidedness, resulting in inaccurate optimization results, or even Affect the operation effect of UPFC

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