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Photovoltaic absorption model for single medium-voltage feeder in medium-voltage distribution network

A single-line, line-optic technology, applied in the field of distribution network, can solve the problems of low calculation scale and efficiency and inapplicability

Inactive Publication Date: 2018-11-06
STATE GRID XIANGSHAN POWER SUPPLY +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, for actual regional applications, more attention is paid to the accuracy of consumption in the calculation process, and the requirements for calculation scale and efficiency are not high
As a result, the scheme recorded in the comparison document is not applicable to the calculation of a single medium voltage feeder

Method used

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  • Photovoltaic absorption model for single medium-voltage feeder in medium-voltage distribution network
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  • Photovoltaic absorption model for single medium-voltage feeder in medium-voltage distribution network

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Embodiment Construction

[0024] The photovoltaic consumption model of a single medium-voltage feeder in the medium-voltage distribution network of the present invention is established by measuring the load fluctuation, wind and solar resource conditions, and the distribution of load and distributed power sources in the feeder under the premise of satisfying the node voltage and operating constraints In this situation, the maximum installed capacity of distributed power generation that can be accessed by a single medium-voltage feeder includes the following steps: obtain power balance constraints, node voltage constraints, substation bus voltage range constraints, and line capacity constraints; establish a specific model:

[0025]

[0026]

[0027]

[0028] V i min ≤V i ≤V i max (4)

[0029]

[0030]

[0031] In the formula, N DG Refers to the total number of distributed power sources N, P gi , Q gi is the active power and reactive power injected into node i, Q li is the reactiv...

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Abstract

The invention aims to provide a photovoltaic absorption model for a single medium-voltage feeder in a medium-voltage distribution network, which can determine the capacity of a single medium-voltage feeder in a medium-voltage distribution network of a photovoltaic power generation system through an algorithm after defining specific constraints. In order to solve the technical problem, the photovoltaic absorption model for the single medium-voltage feeder in the medium-voltage distribution network is implemented according to the following technical scheme: the establishment mode is that the installed capacity of the maximum distributed power supply to which the single medium-voltage feeder can access is solved under the premise of meeting node voltage and operation constraints; and the process comprises the steps of obtaining power balance constraints, node voltage constraints, substation bus voltage range constraints and line capacity constraints, and building a specific model. Compared with the prior art, the position and capacity of photovoltaic power generation are given so as to calculate the voltage distribution and system short-circuit current under various load levels by adopting a heuristic algorithm through model construction, and finally an upper limit of the capacity is obtained.

Description

technical field [0001] The invention relates to a distribution network technology, in particular to a photovoltaic consumption model of a single medium-voltage feeder in a medium-voltage distribution network. Background technique [0002] With the development of new energy sources, new energy sources such as wind power and photovoltaics are gradually added to the network. However, because the power generated by the photovoltaic system is constantly changing due to the influence of the environment, it is not a stable power source. The power grid management unit refuses the grid access of the photovoltaic system on this ground, which not only forms a huge waste of energy, but also affects The entire photovoltaic industry has caused irreparable economic losses. To reduce the light abandonment rate, on the one hand, national policies are needed as guidance, and on the other hand, it is also necessary to conduct consumption analysis from the perspective of distribution network. ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46H02J3/06G06Q10/06
CPCG06Q10/0635G06Q10/06393H02J3/383H02J3/06H02J3/46H02J2203/20Y02B10/10Y02E10/56Y02E40/70Y04S10/50
Inventor 陈益王刚徐园王京锋孔彬乔月辉沈毅
Owner STATE GRID XIANGSHAN POWER SUPPLY
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