Method and product for predicting and evaluating the impact of distributed power generation on distribution network feeder utilization

Abstract

The present invention provides a method, system, computer device, and computer-readable storage medium for predicting and evaluating the impact of distributed power sources on the utilization rate of distribution network feeders. The method includes: obtaining the confidence capacity of a renewable generator used as a distributed power source; Calculate the feeder load rate and capacity factor after the renewable generator is connected to the power distribution system according to the trusted capacity; compare the feeder load rate and capacity factor before and after the renewable generator is connected to the power distribution system , to get the impact relationship of distributed power access on power distribution system. Before the distributed power supply is connected to the power distribution system, it is generally impossible to know what impact it will have on the power distribution system, but the method for predicting and evaluating the impact of the distributed power supply on the utilization rate of the distribution network feeder provided by the present invention can pass the distributed power supply Confidence capacity is calculated after simulated connection, and the influence relationship is obtained, which can analyze the influence of DG access to the distribution network on the annual utilization rate of the feeder.

Description

technical field [0001] The invention relates to the technical field of power grid planning and evaluation, in particular to a method and product for predicting and evaluating the impact of distributed power sources on the utilization rate of distribution network feeders. Background technique [0002] With the increasing awareness of energy saving, emission reduction and green development, distributed power generation, as a clean power generation method, has been more and more widely used. Distributed Generation (DG) has many advantages such as flexible power generation, small footprint, high reliability, and environmental friendliness, and is being widely connected to the distribution network. At present, distributed power generation can be divided into two categories according to whether the primary energy of power generation is renewable: one is distributed power generation with renewable power generation energy, such as: solar photovoltaic power generation, wind energy, g...

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Problems solved by technology

For a long time, power supply companies generally measure the power system performance by the power supply reliability rate reflecting the continuity of power supply, the line loss rate reflecting the power supply economy, and the voltage qualification rate reflecting the power supply quality. Related evaluation methods have not received sufficient attention, resulting in the low utilization rate of current power grid equipment and serious waste of resources; it is urgent to propose an index system for evaluating the utilization rate of distribution network equipment

[0004] At present, some progress has been made in the evaluation index system for the utilization rate of distribution network equipment, which mainly focuses on evaluating the utilization rate of equipment from four aspects: load rate, capacity-to-load ratio, capacity factor, and full life cycle utilization rate. There are many deficiencies: on the one hand, the analysis is mostly done from the qualitative aspect, and the quantitative analysis methods are still relatively lacking; on the other hand, there are still few methods for analyzing the impact of DG access to the distribution network on the annual utilization rate of the feeder, which needs to be investigated. study further

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