A three-phase power flow calculation method for distribution network based on linear load model
A technology of load model and three-phase power flow, which is applied to AC networks, circuit devices, AC network circuits and other directions with the same frequency from different sources, can solve the problems of low calculation accuracy and slow calculation speed, and achieve high calculation accuracy, The calculation speed is improved and the effect of solving three-phase power flow calculation problems
Active Publication Date: 2019-12-20
NANCHANG UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method is a non-iterative method, which avoids the disadvantages of slow calculation speed and low calculation accuracy caused by iteration, and can effectively solve the problem of three-phase power flow calculation in distribution networks.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0113] The present invention selects three non-three-phase balanced system examples for testing and analysis, that is, IEEE13, IEEE37, and IEEE123 node systems. For details, please refer to IEEE PES Distribution System Analysis Subcommittee's Distribution Test Feeder Working Group. Distribution test feeders [EB / OL ]. The corresponding content in http: / / ewh.ieee.org / soc / pes / dsa com / testfeeders / index.html will not be repeated here. Use LTPF_VV, LTPF_XV and implicit Zbus The Gaussian method calculates the three-phase power flow, also with implicit Zbus The power flow calculation result of the Gaussian method is used as the reference standard, and the convergence condition is set to 10 -5 pu.
[0114] Tables 1 to 3 respectively show the mean absolute errors of the two linear power flow methods for IEEE13, IEEE37, and IEEE123 systems. Table 4 shows the mean values including implicit Zbus The total calculation time consumed by the three power flow calculation methods including the Gau...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a three-phase flow calculation method for a power distribution network based on a linear load model, and the method comprises the steps: expanding the Taylor series in a visual real number field, and enabling a star-shaped load and a triangular load to be linearized in a three-phase power distribution system according to the characteristics of a node voltage of the power distribution network through simplifying the node voltage phase angle and voltage operator of the power distribution network; carrying out the unified processing of the star-shaped load and the triangular load through a coefficient matrix, and building two types of unified linear three-phase ZIP load models, wherein the unified linear three-phase ZIP load models are called as a VV linear load model and an XV linear load model according to a result whether the models comprise V conjugate; building two types of three-phase linear flow equations according to the two types of linear load models, and respectively calling the three-phase linear flow equations as a VV linear three-phase linear flow equation and an XV linear three-phase linear flow equation. Compared with a conventional three-phase flow calculation method for the power distribution network based on an iteration method, the method provided by the invention irons out the defects of slow calculation speed and low calculation precision caused by iteration, and can effectively solve a problem of the calculation of three-phase flow of the power distribution network.
Description
Technical field [0001] The invention belongs to the field of power system power flow calculation and analysis, and particularly relates to a three-phase power flow calculation method of a distribution network based on a linear load model. Background technique [0002] At present, three-phase unbalanced systems generally have low- and medium-voltage distribution networks with multiple line systems coexisting. Single-phase power flow cannot meet the needs of analysis, and three-phase power flow calculations should be carried out. [0003] Three-phase power flow calculation can be divided into sequence component method and phase component method according to the calculation components. The sequence component method has the characteristics of small calculation amount and fast calculation speed. It is easy to deal with symmetrical lines and asymmetrical loads, but it is difficult to deal with unbalanced line structures. For symmetrical (parametric asymmetry and lack of phase) networks, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 王淳敖鑫伍惠铖
Owner NANCHANG UNIV