A Redundancy Optimization Algorithm Based on Sequence Optimization for Distribution Networks with Distributed Generation

Abstract

The invention discloses a redundancy optimization algorithm for a power distribution network comprising a distributed power supply based on ordinal optimization. The algorithm comprises the steps: carrying out the classifying of all power distribution network systems, finding a basic system in each class, and calculating the reliability of each basic system; calculating and obtaining the rough reliability through a first correction method, and carrying out the processing and screening of the rough reliability of all power distribution network systems through an ordinal optimization algorithm BP; calculating and obtaining the precise reliability through a second correction method, carrying out the screening through the ordinal optimization algorithm BP, and finally solving an optimal powerdistribution system through employing the redundancy optimization algorithm. The redundancy optimization algorithm provided by the invention firstly proposes a reliability calculation formula, givingconsideration to the line fault rate, of the power distribution network comprising the distributed power supply, and then the ordinal optimization algorithm BP is employed for the screening, thereby improving a conventional method from the aspects of time and precision, and reducing the calculation time.

Description

technical field [0001] The invention belongs to the field of redundancy optimization of distribution network with distributed power supply, and in particular relates to a redundancy optimization algorithm for distribution network with distributed power supply based on sequence optimization. Background technique [0002] Reliability technology was first developed from the aerospace industry and the electronics industry after the Second World War. The task of the power system is to provide users with continuous and qualified electrical energy. Due to various equipment in the power system, including primary equipment such as distributed power supplies, transformers, transmission lines, and circuit breakers, and their supporting secondary equipment, different types of faults will occur, which will affect the normal operation of the power system and the normal power supply to users. Power system failures will cause varying degrees of economic losses to power companies, users and ...

AI Technical Summary

Problems solved by technology

[0008] Disadvantage 1 of the existing technology: traditional reliability calculation algorithms are mainly used in systems with centralized distributed power sources, and there are fewer reliability analysis algorithms for distribution networks with distributed power sources

[0009] Disadvantage 2 of the existing technology: The current distribution network with distributed power sources considers distributed power sources and lines separately, and uses distributed power sources as an additional part of the entire power distribution system. The distribution network is considered as two parts, let it be considered, and the reliability of the distributed power supply and the original distribution network are not considered as a whole.

[0010] Disadvantage 3 of the existing technology: The existing technology ignores the failure rate of the line, which will bring a certain error in some occasions that require high reliability

[0011] Disadvantage 4 of the existing technology: Among the existing large-scale distribution network system reliability redundancy optimization calculation methods, the most common one is the GA algorithm. If you want to find a system with an optimal structure in a series of distribution network systems That is, the reliability meets the requirements and the economical optimal system often adopts an exhaustive method, that is, calculates the reliability of all systems. This method will consume a long calculation time, hours or even days

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