Power distribution network N-1 calibration method taking segmental load transfer into consideration

Abstract

A power distribution network N-1 calibration method taking segmental load transfer into consideration comprises the following steps: carrying out initial analysis of a lattice structure; carrying out simplification analysis of the lattice structure; analyzing circuit transfer analysis; carrying out N-1 calibration and load loss calculations of a circuit and N-1 calibration and load loss calculations of a main transformer respectively, namely, carrying out load segmental cutting sequentially when N-1 calibration and N-1 calibration of the circuit and the main transformer do not pass, and carrying out load transfer capability analysis of the main transformer, load transfer analysis of an interconnection unit of a transformer station, overload transfer correction of the main transformer, and transfer capability calculation of the network of the transformer station sequentially; carrying out load segmental cutting when N-1 calibration and N-1 calibration of the circuit and the main transformer does not pass. The calibration method has the advantages that the power distribution network N-1 calibration result can be higher under the premise that the calculation accuracy is guaranteed; load is cut when a calibration result does not pass, so as to facilitate improvement of calibration level of power distribution network power supply safety, and more accurately guide analysis and selection of planning, reformation and running method of a power distribution network.

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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