Unified power flow controller (UPFC)-containing multi-target optimal power flow calculation method considering wind power decision risk

Abstract

The invention discloses a unified power flow controller (UPFC)-containing multi-target optimal power flow calculation method considering a wind power decision risk. A UFPC can simultaneously control active power flow and reactive power flow of a power transmission line, a new technological means is provided for solving the problem of insufficiency of a power flow control means in a current power grid and has important significance to research on the UFPC; in a system containing wind power, relatively difference is generated between actual power generation cost and expected cost if a dispatching strategy of a machine set is not appropriate and wind power output fluctuates, and the situation that adjustment capability among different scenes is not enough is probable to occur; on the basis, the invention proposes a UPFC-containing multi-target optimal power flow calculation method model considering the wind power decision risk, the model fully balances and considers UPFC optimization-containing expected value and variance of wind power, and a potential decision risk is reduced by taking minimum expected value of power generator cost and power generation cost variance as multi-target functions; and an example simulation result shows that the UPFC-containing multi-target optimal power flow calculation method is effective.

Description

technical field [0001] The invention relates to a multi-objective optimal power flow calculation method including UPFC that takes into account the risk of wind power decision-making, and belongs to the field of power system analysis and calculation. Background technique [0002] With the increasing depletion of global fossil energy and the emergence of climate change and environmental pollution, it is urgent to vigorously develop new energy. Wind energy is a representative of clean and renewable energy. The installed capacity of wind power continues to grow in my country and even around the world. However, wind energy is created by nature and cannot be adjusted artificially. Therefore, wind power has natural randomness and volatility. In a system containing wind power, if the dispatching strategy of the unit is improper, when the wind power output fluctuates, the actual total cost of power generation will have a large deviation from the expected cost. Such a deviation repres...

AI Technical Summary

Problems solved by technology

The deviation of the expected cost means the deviation of the output of the generator set, and due to the limitation of the adjustment ability of the unit itself, it is very likely that the adjustment ability between different scenarios will be insufficient

[0003] The unified power flow controller (UPFC) technology can control the line impedance, voltage and power angle, and can simultaneously regulate the active and reactive power flow of the transmission line. problems, new technical means

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