Method for predicting energy not supplied in power distribution network transformer area under condition of giving consideration to voltage quality

Abstract

The invention discloses a method for predicting the energy not supplied in a power distribution network transformer area under the condition of giving consideration to voltage quality, and the method comprises the steps: obtaining the feature indexes of each transformer area in a power distribution network, the industry where each user belongs and the power consumption quantity of each user in a set statistical time period; calculating the total power consumption of each industry in the transformer areas according to the industry where the user belongs; carrying out the clustering of all transformer areas in the power distribution network through a fuzzy C-mean clustering algorithm according to the feature indexes of the transformer areas; selecting the transformer area which is the nearest to a central sample as a typical transformer area; carrying out the voltage monitoring of the typical transformer area, and calculating the qualified probability of each voltage level; employing the probability that the voltage of the typical transformer area is lower for representing the voltage quality of the transformer areas of this type; carrying out the statistics of the operation conditions of main power equipment of users in each industry at the level that the voltage is lower; determining a correlation table of the lower amplitude of voltage with load rate loss; calculating the hidden energy not supplied caused by the lower voltage according to the qualified rate of voltages at each level of the transformer areas and the total power consumption of each industry, and further obtaining the total energy not supplied of the transformer areas.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for predicting power shortage in distribution network station areas considering voltage quality. Background technique [0002] In the field of power supply reliability, due to insufficient system power supply, power outages and other reasons, the user load is interrupted or the load is reduced, and the reduced power supply is the power system's lack of power supply to the user. In the calculation of the existing power shortage in the distribution network, only two situations of power shortage and blackout are considered, and the power shortage caused by low supply voltage has not been included in the statistical scope. In fact, voltage-sensitive equipment such as PLCs, computers, AC contactors, and motors are widely used in industrial and agricultural production at present. Low voltage often causes user equipment to stop running or fail to start, which has also b...

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Problems solved by technology

[0004] In order to overcome the technical problem of limitations in the existing statistical methods for lack of power supply in station areas that fail to fully account for the hidd

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