Method for processing non-convergence tide data on basis of regulation on reactive power

A technology of power flow data and processing methods, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as non-convergence of power flow calculations

Active Publication Date: 2014-04-02
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] The modern power system has the characteristics of long-distance, heavy load, and large-area networking. With the gradual introduction of the competition mechanism, the power grid is close to the limit operation state, and the power flow equation in this state is prone to the phenomenon that the power flow calculation does not converge

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  • Method for processing non-convergence tide data on basis of regulation on reactive power
  • Method for processing non-convergence tide data on basis of regulation on reactive power
  • Method for processing non-convergence tide data on basis of regulation on reactive power

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Embodiment Construction

[0111] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0112] For the problem of data processing of unsolvable and non-convergent power flow equations, the present invention will obtain convergent power flow results after data processing of unsolvable or non-convergent power flow equations based on the tangent vector index; wherein the basic assumptions are:

[0113] (1) The active power in the power flow data is basically balanced, that is, the following formula is satisfied:

[0114] ΣP L (1+ΔL min %)≤ΣP G ≤ΣP L (1+ΔL max %) (2)

[0115] where ΣP G is the sum of power generation of each node; ΣP L is the sum of the loads of each node; ΔL min % is the reasonable lower limit of network loss; ΔL max % is the reasonable upper limit of network loss;

[0116] (2) When the number of power flow calculation iterations exceeds the maximum allowable number of iterations I max , that is, it is judged...

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Abstract

The invention discloses a method for processing non-convergence tide data on the basis of regulation on a reactive power and belongs to the technical field of control of a power system. According to the invention, an influence index of tide convergence is raised on the basis of a tangent vector and according to the index, a key node influencing the tide convergence is found; by adding reactive power compensation to the key node, a reactive power compensation quantity of the key node is shared in each piece of reactive compensation equipment according to sensitivity information. The method solves the problem of regulating non-convergence tide data into reasonable convergence tide data. The method is helpful for researchers to understand the non-convergence reasons of tide data and provides a powerful means for daily tide data regulation and maintenance work of engineers.

Description

technical field [0001] The invention belongs to the technical field of electric power system control, and more precisely, the invention relates to a processing method of non-convergent power flow data based on reactive power adjustment. Background technique [0002] Power system power flow calculation is a basic electrical calculation to study the steady state operation of power system. Its task is to determine the operating state of the entire system according to the given operating conditions and network structure, such as the voltage (amplitude and phase angle) on each bus, power distribution and power loss in the network, etc. Newton's method is a typical method for solving nonlinear equations in mathematics. After in-depth research by electric power science and technology workers, Newton's method has become the most widely used method in power system power flow calculation. [0003] The modern power system has the characteristics of long-distance, heavy load, and large...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 孟昭军薛峰李威宋晓芳常康方勇杰许晓彤
Owner STATE GRID CORP OF CHINA
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