Power distribution network failure recovery strategy optimization method based on risk assessment

Abstract

The invention discloses a power distribution network failure recovery strategy optimization method based on risk assessment. According to the power distribution network failure recovery strategy optimization method based on the risk assessment, the uncertainties of equipment operation and operation execution are considered, a corresponding model is established to reflect uncertain factors in the recovering process of the system, the concept of risks is introduced, and the fail recovery strategy is assessed; the condition that the importance grade of a load to be recovered is different is considered, the power failure loss of the load under unit capacity within unit time is utilized to reflect the importance grade of the load, an economic index is utilized to measure the importance grade of the load, power-losing loss of the load and recovered benefit are further assessed, thus the risk, the benefit and the price in the recovery process are unified into currency dimension, and an integrated recovery strategy which integrates economy and technology is established; the situation that an important load is preferentially supplied with power is guaranteed, the power distribution network failure power failure loss is reduced, the control cost and the operational risk are recovered, and the reliability and the economy of the power distribution network can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of self-healing control of an intelligent distribution network, and in particular relates to the risk assessment of a distribution network containing distributed power sources and the search for a recovery strategy of maximum profit after a fault. Background technique [0002] Regardless of the traditional distribution network connected by Distributed Generation (DG), the restoration and reconstruction scheme can not only use the internal contact switch of the original system to supply power to the distribution network, but also use other feeders through the external power contact switch. spare capacity for power supply. The fault recovery of the distribution network with DG access is generally divided into two stages: first, the islanding effect of DG is used to divide the distribution network into DG islands, and a planned controllable island is formed to supply power to important loads near the DG. Improve the pow...

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Problems solved by technology

[0007] For distribution network fault recovery research, the current deterministic and probabilistic methods are mostly based on purely technical viewpoints, without considering the economic cost of measures and consequences, and cannot provide economic quantitative support for decision-making.

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