Balancing method and device for line voltage of distribution network

Abstract

The invention provides a balancing method and device for the line voltage of a distribution network. The balancing method comprises the steps that firstly, a resistance error limiting value and a reactance error limiting value after balancing treatment are determined according to measured line data through a preset limiting value balancing method; then error limiting values of voltage amplitude values of the head and tail ends of a line are calculated according to the resistance error limiting value and an inductance error limiting value after balancing treatment; and finally, according to theerror limiting values of the voltage amplitude values of the head and tail ends of the line, the measured voltage amplitude values of the head and tail ends of the line are subjected to balancing treatment. The accurate data can be provided for on-line data monitoring of the distribution network in real time, safe, stable and economical operation of the distribution network is guaranteed, the power outage time of a user is reduced, the calculated quantity is small, the real-time performance is high, and the requirement for on-line calculation can be met; and meanwhile, parts of historical data are fully utilized, and data redundancy is guaranteed.

Description

technical field [0001] The invention relates to the field of distribution network operation analysis, in particular to a method and device for adjusting line voltage of a distribution network. Background technique [0002] Due to the limitations of the distribution network measurement infrastructure, the work of distribution network data measurement cannot be perfect, and the resulting observation data still have errors. They are either limited by the perception ability of the observers or self-reading Improper equipment, unstable observation environment, etc. Adjustment technology has been developed for many years in geographical surveying, communication, control and other disciplines, but it has not been applied in power system. The existing traditional measurement adjustment technology generally requires the measured value to be consistent and unbiased, that is, the true value of the measured value remains unchanged in multiple measurements and gradually converges to a d...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inaccuracy of the distribution network data, the unsafe operation of the distribution network and the increase of power outage time for users in the prior art due to the lack of a distribution network line voltage adjustment method, the present invention provides a distribution network line The voltage adjustment method and device firstly use the preset limit adjustment method to determine the resistance error limit and reactance error limit after the adjustment according to the measured line data, and then according to the resistance error after the adjustment Limit value and inductance error limit to calculate the limit value of voltage amplitude error at the beginning and end of the line, and finally adjust the measured voltage amplitude at the beginning and end of the line according to the limit value of voltage amplitude error at the beginning and end of the line, which can be used for distribution network Online data monitoring provides accurate data in real time to ensure the safe, stable and economical operation of the distribution network and reduce power outage time for users

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