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A Probabilistic Power Flow Assessment Method for Harmonic Pollution Users

A probabilistic power flow and harmonic pollution technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as harsh conclusions, looseness, and unsatisfactory final harmonic control economic and technical indicators, and achieve accurate operation Evaluation and pre-evaluation, comprehensive and more reasonable conclusions

Active Publication Date: 2017-02-15
FUZHOU UNIV
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Problems solved by technology

[0006] Using a certain characteristic value obtained during the operation monitoring time for operation evaluation, or using typical working condition data for pre-evaluation may make the conclusion either harsh or too loose, resulting in unsatisfactory economic and technical indicators for final harmonic control

Method used

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  • A Probabilistic Power Flow Assessment Method for Harmonic Pollution Users
  • A Probabilistic Power Flow Assessment Method for Harmonic Pollution Users
  • A Probabilistic Power Flow Assessment Method for Harmonic Pollution Users

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] The method process of the present invention is as figure 1 As shown, the main algorithms are: ① establish a harmonic power flow calculation model, ② establish a probabilistic power flow calculation and analysis model. specific:

[0038] Build a grid and user probability model:

[0039] The power grid is modeled according to its network topology, and the harmonic admittance matrix used to describe the harmonic network is formed according to the connection of the network. When each harmonic admittance matrix is ​​formed, the admittance element of the fundamental component corresponds to the fundamental impedance of the network, and the admittance element of the harmonic component corresponds to the frequency of the harmonic. In long-term operation, the power of each node in the power grid fluctuates randomly, and its probability distribution can...

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Abstract

The invention discloses a method for estimating probabilistic load flow of a harmonic pollution user, which can more accurately implement operation estimation or pre-estimation on injection pollution of a harmonic interference user. The method has the most obvious advantage that probabilistic harmonic load flow calculation is carried out by adopting user fundamental power probability distribution and harmonic characteristic probability distribution parameters so as to obtain probability distribution characteristics of harmonic pollution of the user for a power grid, not just obtain a harmonic pollution result under a certain specific operating working condition, and the conclusion is more comprehensive and more reasonable.

Description

technical field [0001] The invention relates to the technical field of power grid data monitoring and evaluation, in particular to a probability flow evaluation method for harmonic pollution users. Background technique [0002] The power grid's requirement for harmonic pollution is "whoever pollutes, whoever controls it", so the power quality operation monitoring is carried out at the harmonic user access point. The harmonic monitoring technology that has been widely used at present can detect the harmonic current injected into the system by the user and the harmonic voltage of the power supply point. Generally, it has real-time monitoring function in application, and can carry out statistical analysis on harmonic data. [0003] The purpose of operation monitoring is to evaluate the user's pollution to the power grid from the monitoring data, and design a treatment plan or evaluate the effect of treatment equipment based on this. Therefore, the accuracy of the evaluation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 邵振国苏文博张嫣李兆祥
Owner FUZHOU UNIV
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