Load moment and distributed power supply access power distribution network-based low-voltage treatment method

Abstract

The invention provides a normalized load moment and distributed power supply access power distribution network-based low-voltage treatment method. The method comprises the steps of S1, calculating to obtain the load moment of each line meeting the minimum voltage; s2, selecting a to-be-accessed position of the distributed power supply based on the load moment; s3, constructing an objective function of a locating and sizing model for accessing the distributed power supply to the power distribution network; and S4, determining constraint conditions of the distributed power supply access power distribution network locating and sizing model, and finally determining the access address and capacity of the distributed power supply. According to the method, the problem that the load moment cannot be solved when lines of different models are connected in a mixed mode is solved, voltage distribution is improved through locating and sizing of the distributed power supply based on the normalized load moment, meanwhile, the investment cost of a power distribution network can be reduced, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the field of distribution network planning, and in particular relates to a distribution network low-voltage control method based on load moments and distributed power sources. Background technique [0002] With the continuous acceleration of urbanization, people's demand for electricity is gradually increasing, and long-distance, heavy-load distribution network lines often have low-voltage problems. The analysis and transformation of low-voltage lines has become one of the key issues of power grid companies. one. The measures to solve the low-voltage problem at this stage mainly include transforming low-voltage lines in the station area, adding distribution transformers, installing low-voltage reactive power compensation devices, and adjusting the tap position of distribution transformers, etc. Studying this problem is of great significance to improve the user's power quality and power supply reliability. [0003] In power su...

AI Technical Summary

Problems solved by technology

[0003] In power supply lines with long lines and low voltage levels, the effect of reactive power on voltage drop is not as obvious as in high-voltage lines, so it is not efficient to increase the terminal voltage only by using reactive power compensation devices; the line voltage is too low The main reason is that the long line leads to a large voltage loss, and the problem of excessive voltage loss cannot be solved fundamentally only by adjusting the tap to increase the head-end voltage; for lines with strong seasonal load, the annual load utilization hours Low, the transformation of the line causes a waste of resources

[0004] The existing measures to solve the low voltage problem are not suitable for lines with too long lines, low voltage levels, excessive voltage loss, strong seasonal load, and low annual load utilization hours

Images