Intelligent distribution network reconstruction method concerning distributed power generation and energy storage unit

A distributed power generation and distribution network reconfiguration technology, which is applied in computing, electrical digital data processing, data processing applications, etc., can solve problems such as three-phase imbalance in power distribution systems, affecting calculation accuracy, and lack of scientific modeling

CN103310065AActive Publication Date: 2013-09-18STATE GRID CORP OF CHINA +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-09-18

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Abstract

The invention discloses an intelligent distribution network reconstruction method concerning a distributed power generation and energy storage unit. The method comprises the following steps: building a multi-target multi-constraint mathematical model for distribution network reconstruction, encoding control variables in the model, then adopting the improved NSGA-II (Nondominated Sorting Genetic Algorithm II) for solution, repeatedly calling a three-phase load flow calculation module in the calculation process, decoding individuals of all generations of population in the NSGA-II, conducting three-phase load flow calculation to the decoded network reconstruction schemes to further obtain the adaptation degree of all the network reconstruction schemes, and feeding back to the NSGA-II for optimal treatment. The multi-target multi-constraint mathematical model built in the invention can simultaneously concern the influences of the distributed power supply and energy storage unit; the adopted multi-supply three-phase forward-backward sweep method can well put the three-phase unbalance characteristic of the distribution network into consideration, and is high in computing speed; the quick NSGA with the out-of-limit rejection strategy can avoid weight setting blindness, can promptly eliminate infeasible solution and is high in computational efficiency.
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Description

technical field

[0001] The invention relates to an intelligent distribution network reconfiguration method, in particular to an intelligent distribution network reconfiguration method considering distributed power generation and energy storage units. Background technique

[0002] Distribution network reconfiguration is one of the important means of distribution system operation and control, and it is also an important part of distribution management system. The purpose of the traditional distribution system network reconstruction is to balance the load, eliminate overload, reduce network loss, and reduce power failure losses through the combination optimization of the sectional switch and the tie switch on the premise of ensuring the radial operation of the distribution network. . With the continuous advancement of smart grid construction, it is required that the future distribution network can freely accept various distributed power sources. In recent years, distributed ge...

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Embodiment Construction

[0073] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0074] For the intelligent distribution network reconfiguration method considering distributed generation and energy storage units, its specific steps are as follows: figure 1 As shown, firstly, a multi-objective and multi-constraint mathematical model for distribution network reconfiguration is established, and the control variables in the model are encoded, and then the improved NSGA-II optimization algorithm is used to solve the problem. During the solution process, the three-phase power flow calculation module is repeatedly called, The individuals of each generation population in NSGA-II are decoded, and the three-phase power flow calculation is performed on the decoded network reconstruction scheme, and then the fitness value of each scheme is obtained, and then fed back to NSGA-II for optimization.

[0075] 1. Establish a mathematical model for in...