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BPA data based alternating current system harmonic impedance scanning method

A harmonic impedance, AC system technology, applied in AC network to reduce harmonics/ripple, harmonic reduction device, AC network circuit, etc., can solve the problem that the computing platform cannot effectively cope with model upgrades, is not suitable for modern system computing, There is no core source code and other problems, to achieve the effect of improving retrieval efficiency, reducing scanning volume, and improving calculation

Active Publication Date: 2016-04-27
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] The NIMSCAN program developed by Canada's Taisimon Company is currently the most widely used harmonic impedance equivalent program in the world. The program calculates the system impedance by scanning BPA (Bonneville Power Administration) data, but the scanning process is too cumbersome and there is no core source code. Especially with the increase of grid voltage level and the emergence of new components, the existing computing platform cannot effectively cope with subsequent model upgrades, and has become increasingly unsuitable for modern system computing

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  • BPA data based alternating current system harmonic impedance scanning method
  • BPA data based alternating current system harmonic impedance scanning method
  • BPA data based alternating current system harmonic impedance scanning method

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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0019] like figure 1 Shown, the AC system harmonic impedance scanning method based on BPA data of the present invention comprises the following contents:

[0020] 1. Establish the harmonic impedance model of each component in the power system

[0021] When performing harmonic analysis, accurate component models are a key factor in ensuring accurate and reliable results. On the basis of studying the component model in BPA, with reference to various typical component harmonic impedance models, each component model that the present invention sets up is as follows:

[0022] 1) Establish the generator harmonic impedance model

[0023] like figure 2 As shown, in the act...

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Abstract

The invention relates to a BPA data based alternating current system harmonic impedance scanning method. The method is characterized by comprising the following steps: (1) establishing each element harmonic impedance model in an electrical power system; (2) reading BPA data, and inputting an appointed frequency range and observation nodes; (3) carrying out node numbering optimization by adopting a semi-dynamic method based on an improved wiring matrix; (4) forming a node admittance matrix line by line according to an optimized numbering sequence; (5) solving a node voltage equation; and (6) changing frequency in the appointed frequency range according to a frequency scanning range, reforming a node admittance matrix, and returning the step (5) to solve the node voltage equation so as to obtain harmonic impedance under different frequencies. Compared with the prior art, the computation speed is obviously increased and is not restricted by node quantity and node voltage level, and the method is widely applied to harmonic impedance computation in the electrical power system.

Description

technical field [0001] The invention relates to a method for scanning harmonic impedance of an AC system based on BPA data, and belongs to the technical field of harmonic impedance calculation of electric power systems. Background technique [0002] The boundary conditions of the converter station access system of the UHV DC transmission project are complex and the operation modes are diverse. Reasonable determination of the harmonic impedance equivalent parameters used in the design of the AC filter can realize the reasonable configuration of the AC filter scheme. The key to harmonic instability in direct current (HVDC) systems. There are tens of thousands of nodes in modern power systems, and the scale of node equations is huge. Therefore, it is necessary to study a harmonic impedance calculation method that can efficiently handle large matrices and take into account the changes in network topology caused by changes in the operation mode of the power network. especially i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01G06F17/50
CPCG06F30/30H02J3/01H02J2203/20Y02E40/40
Inventor 吴方劼马为民石岩陈东乐波杨一鸣胡志坚王小飞薛英林付颖祝全乐杨媛王赞杜晓磊
Owner STATE GRID CORP OF CHINA
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