A distribution network n‑1 calibration method considering segmental load transfer

Abstract

A distribution network N‑1 verification method considering segmental load transfer: initial network structure analysis; Transformer N-1 verification and lost load calculation, including sequentially performing line N-1 verification and segmental load removal when the line N-1 verification fails, and sequentially performing load transfer capacity analysis of the main transformer, Substation contact unit transfer load analysis, main transformer overload transfer load correction, substation network transfer capacity calculation; main transformer N‑1 verification; when the main transformer N‑1 verification fails, the load is cut off in sections. The present invention can obtain better distribution network N-1 verification results under the premise of ensuring calculation accuracy, and reduce the number of removed loads when the verification fails, which helps to improve the power supply safety inspection level of the distribution network. So as to more accurately guide the analysis and selection of distribution network planning, transformation and operation mode.

Description

technical field [0001] The invention relates to an N-1 verification method of a distribution network. In particular, it relates to a distribution network N-1 verification method for distribution network power supply safety inspection considering segmental load transfer. Background technique [0002] The distribution network plays a very important role in the distribution of electric energy in the power network. In the series of links of power generation, transmission, distribution, and power consumption, it is responsible for supplying electric energy to each distribution station and various electric loads, and is the final distribution of electric energy. The terminal network of the power system is a link directly connected with customers in the power system. In distribution network planning, operation and scheduling, the N-1 safety criterion is usually used to evaluate the distribution network connection mode, that is, to check whether the distribution network planning de...

AI Technical Summary

Problems solved by technology

[0003] The traditional N-1 inspection of the medium-voltage distribution network mainly adopts a "one size fits all" approach to consider the transfer results, considering whether the entire line passes through, and does not consider the situation that some segments in the line can be segmented for transfer, that is, when the contact When the capacity of the channel is sufficient, it is considered that the verification can be passed; when the capacity of the communication channel is not enough to carry all the loads to be transferred, it is considered that the verification cannot be passed extensively, and the specific loss load cannot be calculated in detail

Obviously, the results obtained by using the traditional verification method are not enough to reflect all the verification information, and it is difficult to meet the requirements of fine analysis and management of distribution network

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