Active distribution network voltage drop simulation and evaluation method

Abstract

The invention provides an active distribution network voltage drop simulation and evaluation method. The method comprises the steps that 1, the existing distribution network analysis software is used to build a model, and network flow is calculated; 2, through two-point method sampling, distribution network fault data and distributed power supply capacity data are produced, and a simulation scheme is determined; 3, simulation calculation is carried out, and expectation, variance, a three order central moment, a probability density function f(xi) and an SARFIx index of each node voltage drop are calculated; 4, a Monte Carlo method is used to calculate a probability density function f(xi) MC and an SARFI'x index of each node voltage drop amplitude; 5, the f(xi) and the f(xi) MC are compared, and the SARFIx index and the SARFI'x index are compared; and 6, if a comparing requirement is not met, returning to the step of 2 is carried out. Compared with the existing technology, the active distribution network voltage drop simulation and evaluation method provided by the invention has the advantages that various short circuit faults in a power distribution network are comprehensively considered; the method can adapt to power distribution networks of various wiring modes; and the calculation efficiency is high.

Description

technical field [0001] The invention relates to a voltage drop simulation and evaluation method, in particular to a voltage drop simulation and evaluation method of an active distribution network. Background technique [0002] Voltage sag (Voltage Sag), also known as voltage sag or voltage sag, refers to an event in which the root mean square value of the supply voltage suddenly drops to 90%-10% of the rated voltage amplitude in a short period of time, and its typical duration is 0.5 -30 cycles. As the most important power quality problem that affects the normal and safe operation of electrical equipment and the normal production of industrial users, voltage sag mainly includes: [0003] ①: Affect the normal electricity consumption of residents' work and life; [0004] ②: The voltage drop has a wide range of impacts and causes huge economic losses to industrial users; [0005] ③: Causing casualties and equipment damage. [0006] With the development of smart distribution...

AI Technical Summary

Problems solved by technology

[0004] ②: The voltage drop has a wide range of impacts and causes huge economic losses to industrial users;

[0005] ③: Causing casualties and equipment damage

The sampling times of the Monte Carlo method has nothing to do with the scale of the system, and the complexity of the system has little effect on it, but the Monte Carlo method has the disadvantages of static, low computational efficiency, and long time consumption.

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