A method for analyzing the ability of distribution network to accept distributed power generation based on power function model

Abstract

The invention relates to the technical field of a power distribution network of a power system, and provides a power function model-based analysis method for acceptance capability of a power distribution network on a distributed power supply. According to the method, a power function model of the distribution power supply is obtained on the basis of an open-type running power distribution network model of the distributed power supply accessed to a user side, the sensitivity indexes of an access power of the distributed power supply on each factor under different power distribution network states are obtained according to the power function model, the influence of single-factor change on the acceptance capability of the power distribution network on the distributed power supply is analyzed according to the sensitivity indexes, three indexes of single-factor partial increment, basis partial increment and synergistic partial increment are calculated by a partial increment analysis model of a power function, the integral influence of multi-factor change on the acceptance capability of the power distribution network on the distributed power supply is analyzed according to an index result, and the quantitative analysis of the influence factor on the acceptance capability of the power distribution network on the distributed power supply is achieved.

Description

technical field [0001] The invention relates to the technical field of power system distribution network, and more specifically, to a method for analyzing the ability of a distribution network to accept distributed power sources based on a power function model. Background technique [0002] In recent years, with the widespread application and development of distributed power generation technology, the access of large-scale distributed power to the distribution network has changed the structure of the power system, changing the distribution network system from a simple power receiving network to a complex active power generation system. Therefore, it also brings some adverse effects, such as overvoltage at the access point, and branch transmission capacity exceeding the allowable limit. In order to ensure the reliable and continuous operation of the distribution network, it is urgent to study and analyze the acceptance capacity of the distribution network. [0003] The accep...

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Problems solved by technology

[0003] The acceptance capacity of distributed generation in the distribution network is restricted by many factors such as operating conditions, distributed generation and load characteristics, grid structure, and management methods. Existing research mainly focuses on the calculation and optimization of the upper limit of the acceptance capacity, such as Considering the operating constraints of the distribution network such as power quality and protection configuration, evaluate the distribution network's distributed power generation capacity, or study the calculation method of the maximum capacity, and the optimal planning scheme for distributed power generation site selection and capacity, The above research lacks the functional modeling of the distribution network's distributed power generation acceptance capacity, and there is no quantitative evaluation index for the analysis of the influencing factors, and the conclusions drawn have no universal significance

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