Distributed photovoltaic power connection planning method giving consideration to electric energy quality problem

Abstract

The invention relates to a distributed photovoltaic power connection planning method giving consideration to an electric energy quality problem. The method specifically comprises the steps: taking the current total harmonic distortion rate, voltage deviation and voltage fluctuation of an access point as the characteristic quantities for representing the electric energy quality of a power grid after a photovoltaic power optimization configuration connection scheme based on the maximum connection capacity is determined, estimating the electric energy quality of the access point through a data envelopment analysis method, and giving a correction scheme for the access point which does not accord with an electric energy quality standard; finally obtaining a distributed photovoltaic power generation planning scheme which accords with the standard in electric energy quality. Compared with a conventional method of treatment after connection, the method is higher in economic performance, employs a more advanced algorithm for processing the problem, and is enabled to be more scientific. The method gives consideration to the electric energy quality problem after photovoltaic connection at a planning stage, can guarantee the normal stable operation of a connection project and the equipment of the power grid, also can give margin for the connection of a long-term photovoltaic power supply, and is good in prospect.

Description

technical field [0001] The patent of the present invention relates to a distributed photovoltaic power access planning method considering power quality issues. Background technique [0002] With the rapid development of smart grid technology, more and more new energy or energy-saving and low-loss distributed generation equipment (DG) are connected to the distribution network, among which distributed photovoltaic power is affected by the intensity of solar radiation, and has Randomness and volatility, after being connected, will change the original topology and power flow of the system, and have an impact on the power quality of the grid. As the penetration rate of distributed photovoltaic power generation in the distribution network continues to rise, it will pose a threat to the safe and economic operation of the power grid when it has a serious impact on the power quality of the distribution network. [0003] Traditional power grid planning with distributed photovoltaics ...

AI Technical Summary

Problems solved by technology

Traditional research methods do not combine distributed generation planning and power quality assessment

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