A Robust Optimization Method for Smart Distribution Networks to Improve Operation Safety

Abstract

The invention discloses an intelligent power distribution network robust optimization method capable of improving operational safety. The intelligent power distribution network robust optimization method comprises the following steps of 1, establishing a power grid dispatcher independent decision-making optimization model, wherein network loss is important index of power grid economical efficiencyand can reflect the energy-saving effect of the power grid after a distributed power supply is connected, and the minimum network loss is used as a target function; S2, establishing a nature independent decision-making optimization model; and solving a robust optimization dispatching strategy, wherein it is known as that the nature, as a participant of a game, adjusts the active output of all distributed renewable energies in a condition of fixed decision-making variable so as to try to deteriorate the system operation state; and S3, performing game solving to obtain a balance point, whereinbalance is gradually reached in independent optimization of respective optimized models in the game process by taking the power grid dispatcher and the nature as the participates. By virtue of the method, the network loss standard difference and the number of times of system possible safety out-of-limit are minimized, extreme severe influence caused by uncertainty of the distributed power supply is avoided, and system operation safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of distribution networks, and in particular relates to a robust optimization method for an intelligent distribution network that improves operation safety. Background technique [0002] Distributed power has its advantages both economically and technically. In terms of economy, it has the advantages of small investment and delaying the investment and construction of power grid equipment; in terms of technology, the access of distributed power can realize the distribution network load power Ground compensation reduces the line flow flowing from the large power grid into the load, thereby reducing network loss, and the existing widely connected distributed wind turbines and distributed photovoltaics also have the characteristics of zero emissions and environmental protection. However, with the emergence of a large number of distributed renewable energy, while bringing huge economic and environmental benefits, ...

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Problems solved by technology

Many existing literatures mostly consider how to achieve the optimal economics of the distribution network under the randomness of distributed power output. However, the access of distributed power may also have an adverse effect on the security of the distribution network. At present, There is still little research on distribution network scheduling optimization based on operational robustness

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