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Control parameter optimization method for hybrid direct current transmission system based on whale algorithm

A technology of hybrid DC power transmission and optimization method, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems that the accuracy and efficiency of parameter optimization technology cannot meet the needs, and it is difficult to adapt to different working conditions, so as to ensure the accuracy And the reliability of optimization, easy implementation, and the effect of fewer parameters

Inactive Publication Date: 2019-07-30
HOHAI UNIV +1
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Problems solved by technology

[0006] The problem to be solved by the present invention is: for the parameter tuning in the hybrid direct current transmission system in the long-distance large-capacity power transmission project, the existing method is difficult to adapt to different working conditions, and the accuracy and efficiency of the existing parameter optimization technology can not meet the demand

Method used

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  • Control parameter optimization method for hybrid direct current transmission system based on whale algorithm
  • Control parameter optimization method for hybrid direct current transmission system based on whale algorithm
  • Control parameter optimization method for hybrid direct current transmission system based on whale algorithm

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Embodiment

[0063] In the implementation of the method of the present invention, the calculation example model is a hybrid DC transmission system model with one end LCC and one end VSC, and the topological structure is shown in the appendix figure 1 . With the input of the three PI control links, the DC current on the rectifier side, the active power and AC voltage on the inverter side, the ITAE value is calculated as the target optimization control parameter to meet the requirements of improving the dynamic response performance of the system. The target optimization control index function as follows:

[0064]

[0065] Use the whale optimization algorithm to realize the optimization of control parameters, the flow chart is shown in the appendix figure 2 . Simulation verification of the method of the present invention is based on image 3 Based on the principle in PSCAD, build the PSCAD-MATLAB interface module, which calls the Fortran subroutine through the Fortran file DSDYN in PSC...

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Abstract

A control parameter optimization method for a hybrid direct current transmission system based on a whale algorithm. For the fact that PI parameter tuning can greatly affect the performance of the system in a hybrid high-voltage direct current transmission system, the invention provides a novel parameter optimization method for a hybrid direct current transmission system. The method based on a whale optimization algorithm uses the integral ITAE of time multiplying the absolute error as an objective function to realize the PI parameter tuning with the restraint of an inequation. The method of the invention utilizes the interface technology between the PSCAD and the MATLAB to realize joint call to the PSCAD and the MATLAB, and utilizes the whale algorithm to search for the optimal control parameter, and uses the multiple running functions in the PSCAD to realize the multiple calls between softwares, thereby achieving the optimized search for the control parameter. Through modeling and simulation, the method is validated to improve the dynamic response performance of the hybrid direct current transmission system.

Description

technical field [0001] The invention relates to a control parameter optimization method of a hybrid direct current transmission system based on a whale algorithm, and belongs to the technical field of power system operation and control. Background technique [0002] With the rapid economic development in the eastern region of my country, its power consumption will increase significantly. At the same time, the eastern region has frequent smog, and the atmospheric environment capacity tends to be saturated. Long-distance large-capacity power transmission has become inevitable. LCC-HVDC has become the choice of traditional DC transmission due to its high voltage level, large transmission capacity, and mature technology. However, LCC itself is a semi-controlled thyristor commutator, and there are still the following problems: it is completely dependent on the AC grid, and cannot be passively sent or Importing passive loads, there is a commutation failure problem, which needs to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 孙国强刘其朴臧海祥杨佳汤晓晨孙军
Owner HOHAI UNIV
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