Maximum power permeability calculation method for distributed power supply in connection to power distribution network

Abstract

The invention relates to a maximum power permeability calculation method for a distributed power supply in connection to a power distribution network. The maximum power permeability calculation method is characterized by comprising the steps that 1), for the maximum power permeability for the distributed power supply in connection to the power distribution network, the maximum power permeability of a medium-voltage distribution line is taken in consideration, and the maximum power permeability in a main transformer power supply region is taken in consideration as well; the maximum power permeability of the medium-voltage distribution line refers to a specific value between the maximum installed gross capacity of the distributed power supply and the maximum transmission capacity of the distribution line in the distribution line; the permeability in the main transformer power supply region refers to a specific value between the installed capacity of the distributed power supply and a main transformer rated capacity in the main transformer power supply region; and 2), the line intercepting amount constraint, the node voltage constraint and the busbar short circuit current constraint are comprehensively taken into consideration. According to the maximum power permeability calculation method, the different positions of the distributed power supplies of different types in connection to the power distribution network are illustrated and compared, so that the maximum power permeability of the distributed power supply in connection to the power distribution network is further optimized, and a technical scheme and calculation evidence for the distributed power supply in connection to the power distribution network widely and massively are provided.

Description

technical field [0001] The invention relates to a method for calculating the maximum power penetration rate of a distributed power source connected to a distribution network. The invention belongs to the technical field of penetration rate algorithm for distributed power supply access to distribution network. Background technique [0002] With the vigorous development of distributed power generation, my country's support for distributed power generation access to distribution networks has been increasing. In the future, more and more distributed power sources will be directly connected to the medium-voltage distribution network. However, the existing traditional distribution network is not designed for the access of distributed power sources. Corresponding transformation and upgrading must be carried out after the access of distributed power sources. Among them, the transformation costs of secondary systems such as relay protection and distribution automation Relatively fe...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the calculation method of the maximum power penetration rate of the distributed power supply in the prior art does not fully consider the constraints of the primary system of the distribution n

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