Method for calculating maximum open capacity of distributed photovoltaic of 10kV power grid

Abstract

The invention discloses a method for calculating the maximum open capacity of distributed photovoltaic of a 10kV power grid, and belongs to the field of management of power distribution networks. Themethod comprises the steps of: S100, establishing an evaluation model of the maximum open capacity according to security standards; S200, collecting the actual walk path of the existing 10kV line in an appointed area, the capacity and the position of an articulated distribution transformer, the annual minimum load data on each line and photovoltaic capacity data accessed by the distribution transformer; S300, determining the running mode of the power grid, and inputting the data collected in the step S200 into power grid power flow simulation software, so that power flow calculation is carriedout; and S400, in combination with a specific scene, analyzing the maximum open capacity according to the evaluation model in the step S100 and the calculation result in the step S300. By means of the calculation method, orderly management of photovoltaic access can be realized; simultaneously, the maximum open capacity of the distributed photovoltaic provides effective basis for selecting and investing a distributed photovoltaic power generation project place by a client; and good development of the distributed photovoltaic and the power grid is promoted.

Description

technical field [0001] The invention relates to the technical field of distribution network management, in particular to a method for calculating the maximum openable capacity of distributed photovoltaics in a 10kV power grid. Background technique [0002] In order to reduce dependence on fossil energy and achieve energy conservation and emission reduction, the state has issued a series of policies in recent years to vigorously develop the photovoltaic industry, and photovoltaic power generation projects have developed rapidly. Large-scale distributed photovoltaic power generation has had a profound impact on grid access planning, construction, and safe and stable operation, and has put forward new requirements for grid planning, maintenance, and operation. [0003] When a distributed photovoltaic project is connected to a 10kV power grid, due to its intermittent and fluctuating power generation, it brings great challenges to the power grid. Issues such as voltage shocks and...

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Problems solved by technology

[0003] When a distributed photovoltaic project is connected to a 10kV power grid, due to its intermittent and fluctuating power generation, it brings great challenges to the power grid. Issues such as voltage shocks and power flow reversal generated by distributed photovoltaics have a great impact on the safety and security of the regional power grid. Stable operation constitutes a huge impact. Recently, many cities have encountered problems such as the connection of distributed photovoltaics to the grid, which leads to a sharp increase in the voltage near the access point and affects the quality of power supply of the grid.

However, at present, there is still a lack of guiding opinions on how to ensure the coordinated development of low-voltage photovoltaics and power grids in China. How to ensure the coordinated development of photovoltaic power generation and power grids under the new situation is one of the important issues that power management departments need to solve urgently

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