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A method and device for calculating the penetration rate of distributed power sources

A technology of distributed power supply and calculation method, which is applied in the direction of circuit devices, electrical components, AC network circuits, etc., to achieve the effect of ensuring safety and reliability and reducing the difficulty of calculation

Active Publication Date: 2022-08-09
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of the calculation method of the DG acceptance capacity of the distribution network medium-voltage feeder under the constraints of the voltage distortion rate, the present invention proposes a distributed power supply penetration rate calculation method and device

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  • A method and device for calculating the penetration rate of distributed power sources
  • A method and device for calculating the penetration rate of distributed power sources
  • A method and device for calculating the penetration rate of distributed power sources

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Embodiment 1

[0051] An embodiment of the present invention proposes a method for calculating the penetration rate of distributed power sources. The flow chart is as follows: figure 1 shown, including the following steps:

[0052] Using the difference between the distance from the head end node of the medium voltage feeder to the end node of the medium voltage feeder and the distance from the end node of the medium voltage feeder to any node except the end of the medium voltage feeder, determine the voltage distortion rate caused by the distributed power supply connected to the end of the medium voltage feeder maximum applicable conditions;

[0053] If the difference satisfies the applicable condition, the penetration rate of the medium voltage feeder to the distributed power generation is determined according to the iterative update of the tentative penetration rate.

[0054] Distributed power is connected to the end of the medium voltage feeder in the distribution network, such as figu...

Embodiment 2

[0093] The embodiment of the present invention also provides a distributed power supply penetration rate calculation device, including:

[0094] The first determination module is used to determine whether the distributed power source is connected to the medium voltage by the difference between the distance from the head end node of the medium voltage feeder to the end node of the medium voltage feeder and the distance from the end node of the medium voltage feeder to any node other than the end of the medium voltage feeder. The applicable conditions for the maximum voltage distortion rate caused by the end of the feeder;

[0095] The second determination module is configured to determine the penetration rate of the medium voltage feeder to the distributed power generation according to the iterative update of the tentative penetration rate.

[0096] Specifically, the first determining module includes:

[0097] The first judgment unit is used to judge whether there is a reverse...

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Abstract

The present invention provides a method and device for calculating the permeability of distributed power supply, comprising: using the distance from the head end node of the medium voltage feeder to the end node of the medium voltage feeder and the distance from the end node of the medium voltage feeder to any node except the end of the medium voltage feeder. The difference is to determine the applicable conditions for the maximum voltage distortion rate caused by the distributed power supply being connected to the end of the medium-voltage feeder; if the difference satisfies the applicable conditions, determine the effect of the medium-voltage feeder on the distributed power supply according to the iterative update of the test permeability. penetration rate. The technical scheme provided by the present invention proposes a method for calculating the penetration rate of distributed power generation when the voltage distortion rate at the end of the medium-voltage feeder is a limiting factor, which provides a theoretical basis for the calculation of the acceptance capacity of distributed power generation under the control of the voltage distortion rate, and greatly reduces the the computational difficulty.

Description

technical field [0001] The invention relates to the technical field of power system operation analysis, in particular to a method and device for calculating the penetration rate of distributed power sources. Background technique [0002] Distributed power generation technology utilizing renewable energy is an effective means to solve the increasingly serious energy and environmental problems. Distributed Generation (DG for short) refers to a clean, environmentally friendly, economical, efficient and reliable power generation method with power ranging from tens of kilowatts to tens of megawatts and distributed near the load. In recent years, with the strong support of national policies, the scale of DG grid connection in the distribution network has continued to increase. However, DG is different from traditional synchronous motors. Different climate changes and geographical locations will have a great impact on its operation status. It also adversely affects the safety, sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 高菲宋晓辉盛万兴孟晓丽马维青张慧明贾志义唐保国
Owner CHINA ELECTRIC POWER RES INST