Research on Planning of Distributed Photovoltaic Power Supply Connected to Medium Voltage Distribution Network under the Condition of Satisfying Voltage Quality

摘要

Due to its good reproducibility and cleanliness, distributed photovoltaic power supplies are connected to the medium-voltage distribution network, which also brings new challenges to the medium-voltage distribution network. A large number of distributed photovoltaic power sources irregularly connected to the distribution network will have a certain impact on the distribution network, resulting in restricted operation of the distribution network. From the perspective of distribution network planning, this paper studies and analyzes the distribution of the load and distributed photovoltaic power along the 10kV line, and matches the location and capacity of the load and distributed photovoltaic power along the 10kV line when the voltage quality is met, 36 typical combinations are analyzed and calculated to obtain the capacity area of the distributed photovoltaic power supply that is more strict than the actual situation under different combinations. Taking the typical parameters of the 10kV urban distribution network and the township distribution network as an example, the specific calculation of the distributed photovoltaic power access capacity area is carried out, and the allowable access range of the distributed photovoltaic power under different parameters of the combination is obtained. The distributed photovoltaic power supply is connected to the medium voltage distribution network to provide a scientific basis.