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Calculation method of network loss micro-increase rate based on generator Norton equivalent and generalized inverse

A technology of network loss micro-increase rate and calculation method, which is applied in the field of value and generalized inverse network loss micro-increase rate calculation, and can solve problems such as many assumptions, large calculation errors, and dependence on balanced nodes.

Active Publication Date: 2017-01-11
SHENZHEN CLOU ELECTRONICS
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AI Technical Summary

Problems solved by technology

The current general algorithm has many assumptions, relies on the balance node, and the calculation result at the balance node of the power system is always zero and the calculation error is large.

Method used

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  • Calculation method of network loss micro-increase rate based on generator Norton equivalent and generalized inverse
  • Calculation method of network loss micro-increase rate based on generator Norton equivalent and generalized inverse
  • Calculation method of network loss micro-increase rate based on generator Norton equivalent and generalized inverse

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Embodiment Construction

[0048] refer to figure 1 , the present invention is based on generator Norton equivalent and generalized inverse network loss micro-increase rate calculation method, comprising the following steps:

[0049] A. Acquire power system network structure parameters and initial operating data;

[0050] B. According to the power system network structure parameters and initial operating data, the load power equivalent is converted into grounding impedance and calculated;

[0051] C. Form a new type of node admittance matrix, and then calculate a new type of node impedance matrix;

[0052] D. Calculate the power flow of the power system through the Newton-Raphson method until iterative convergence, and obtain the result of the power flow calculation;

[0053] E. Calculate the partial derivative matrix of the branch power to the control variable and the new transposed Jacobian matrix;

[0054] F, according to the M-P generalized inverse matrix and the singular value decomposition meth...

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Abstract

The invention discloses a method for calculating incremental transmission loss based on the Norton equivalence and generalized inverse of a generator. The method comprises the steps of building an equivalence network of a novel power system proceeded from the impedance of a load power equivalence, and calculating a novel transposed jacobian matrix by the combination of a trend, so as to derive the incremental transmission loss capable of reflecting the power variables of all nodes of a power network, and effectively reduce a calculation error. According to the method provided by the invention, the change of the power of nodes and the loss of the power grid can be balanced without the introduction of a balance generator, therefore the method is more rigorous than a calculating method of the incremental transmission loss corresponding to referred nodes, the phenomenon that the incremental transmission loss of some generator or load is constantly zero cannot be caused, the multiple-value phenomenon of the incremental transmission losses of all nodes cannot be caused, and the computed result is exclusive; furthermore, the method for calculating incremental transmission loss based on the Norton equivalence and generalized inverse of the generator can be extensively applied to the analysis of a power system.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a method for calculating the slight increase rate of network loss based on generator Norton equivalent and generalized inverse. Background technique [0002] The power system is composed of generators, transformers, transmission lines, loads, reactive power compensation capacitors, converters and other components. It is a unified whole that realizes energy production, transmission, and regulation. Transformers, transmission lines, and other equipment that convert, transmit, and distribute electric energy in the power system can be described by equivalent circuits with centralized parameters to form a mathematical model of the power network; loads and generators are nonlinear components, and a The amount of injected current is indicated. In practical engineering applications, considering that the purpose of the power grid is to transmit electric energy, traditional ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F19/00
CPCH02J3/00H02J3/003
Inventor 肖述强
Owner SHENZHEN CLOU ELECTRONICS