Controllable serial capacitor optimal configuration method capable of improving available transmission capacity

A technology of series capacitors and optimal configuration, which is applied in the field of power systems, can solve problems such as large amount of calculation, and achieve the effect of satisfactory calculation accuracy and fast calculation speed

Active Publication Date: 2010-11-10
NORTHEAST DIANLI UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can accurately calculate the installation position and compensation degree of TCSC, the amount of calculation is too large, and it is difficult to apply it to the actual system with many buses and branches.

Method used

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  • Controllable serial capacitor optimal configuration method capable of improving available transmission capacity
  • Controllable serial capacitor optimal configuration method capable of improving available transmission capacity
  • Controllable serial capacitor optimal configuration method capable of improving available transmission capacity

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Embodiment Construction

[0055] The present invention will be further described below using the drawings and examples.

[0056] Such as figure 1 , the TCSC is regarded as a variable reactance connected in series in the transmission line, and its capacity is related to the reactance of the line where it is located. Assuming that TCSC is installed on the branch i-j, when the ground admittance B is small, the compensation reactance X TCSC with branch impedance Z ij Superimposed, that is:

[0057] X ij ′ = X ij + X TCSC X TCSC = - c X ij

[0058] In the formula, X ij , X′ ij i...

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Abstract

The invention discloses a controllable serial capacitor optimal configuration method capable of improving available transmission capacity, which is characterized in that: the position variables and compensation degrees of TCSCs serve as antibody genes to be coded, initial data are input to generate initial populations randomly, and the initial populations are divided into an open crossover and mutation rates are set for the populations of each group, each group of populations are optimized by an immune algorithm, the affinity between each antibody and an antigen in each population in each group is calculated, and clonal selection, clonal amplification, crossover and variable immunity are performed; at the end of the evolution of each generation, a communicating operator is used to allow the populations to interexchange part of antibodies and the affinity is calculated; after the evolution of a plurality of generations, the currently optimal antibodies are distributed into all populations by a transmission operator; and after all populations evolve for one time, if an algorithm meets convergence conditions is judged, and optimal results are output if the algorithm meets the convergence conditions, or immune supplementation is performed and evolution circulation is returned to if the algorithm does not meet the convergence conditions. The method can solve the optimal configuration problem of the plurality of TCSCs.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to an optimal allocation method of controllable series capacitors for improving available power transmission capacity. Background technique [0002] Available transmission capacity ATC (Available transfer capability) refers to the remaining transmission capacity in the actual physical network that can be used for commercial use on the basis of the existing transmission contract. Thyristor Controlled Series Capacitor TCSC (Thyristor Controlled Series Capacitor) can compensate part of the inductive impedance of the transmission line, control the power flow distribution, improve the stability of the system operation, increase the transmission capacity of the line, and enhance the actual transmission capacity of the network. [0003] The effectiveness of TCSCs in increasing transmission capacity depends largely on the installation location and compensation capacity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/14Y02E40/10
Inventor 李国庆王振浩张健辛业春陈厚合王鹤王利猛李江
Owner NORTHEAST DIANLI UNIVERSITY
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