Improved matrix pencil algorithm based stationing method for additional damping controller of multi-infeed direct current system

A multi-infeed DC and additional damping technology, which is applied in the directions of instruments, calculations, power transmission AC networks, etc., can solve the problems of not considering the interaction of controllers, noise sensitivity, etc.

Inactive Publication Date: 2014-12-10
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

The existing technology mainly determines the installation location of the additional damping controller based on prony analysis to identify the residual value of a certain oscillation mode in the transfer function. Therefore, the interaction of the controller is not considered, and it is sensitive to noise

Method used

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  • Improved matrix pencil algorithm based stationing method for additional damping controller of multi-infeed direct current system
  • Improved matrix pencil algorithm based stationing method for additional damping controller of multi-infeed direct current system
  • Improved matrix pencil algorithm based stationing method for additional damping controller of multi-infeed direct current system

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Embodiment

[0038] Such as figure 1 As shown, the test system described in the mark I is composed of five regional power grids in areas A, B, C, D, and E, and the five regional power grids described in the mark II are connected by 7 direct currents and the two AC sections described in the mark III; Among them, No. 1 and No. 2 are directly connected to regional power grid A and regional power grid D, No. 3 is directly connected to regional power grid A and regional power grid E, and No. 4 to No. 7 are directly connected to regional power grid C and regional power grid D. There is AC section 1 between area A and area B, and AC section 2 exists between area B and area C.

[0039] 1. Control sensitive point mining

[0040] According to the calculation results of the small perturbation program, it can be known that the dominant oscillation mode is 0.35 Hz, and the participation factor of unit 1 in this mode is relatively large. therefore, Taken as the power angle change of Unit 1, Take N...

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Abstract

The invention discloses an improved matrix pencil algorithm based stationing method for an additional damping controller of a multi-infeed direct current system. The improved matrix pencil algorithm based stationing method for the additional damping controller of the multi-infeed direct current system is characterized in that a matrix pencil algorithm is improved to identify power angle oscillation data to calculate direct current control sensitive factors of a dominant oscillation mode to confirm a best direct current additional damping controller installation site of the dominant oscillation mode. The improved matrix pencil algorithm based stationing method for the additional damping controller of the multi-infeed direct current system has the advantages of improving the calculation efficiency and the anti-interference capability due to improvement of the matrix pencil algorithm, enabling controller control costs of the dominant oscillation mode and interaction of the controller to be fully considered, providing a direct current control sensitive factor concept and accurately positioning the best installation site of the direct current additional damping controller.

Description

technical field [0001] The invention relates to a method for arranging additional damping controllers of a multi-feed direct current transmission system based on an improved matrix beam algorithm, and belongs to the field of high voltage direct current transmission. Background technique [0002] The control effect of additional controllers in high voltage direct current transmission (HVDC) systems is closely related to the selection of its input and output signal positions. The correct point selection isolates the interaction between the controller and the oscillation mode, changes the zero-pole distribution of the transfer function, reduces the control cost, and improves the control performance. The maturity of the Wide Area Measurement System (WAMS) has expanded the range of observation signals available to the additional controller of the HVDC system to various electrical quantities of the entire system, and the distribution of control and observation signals can be separ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36G06Q50/06
CPCY02E60/60
Inventor 李兴源赵睿李保宏林桥刘天琪王渝红张英敏易俊王安斯
Owner SICHUAN UNIV
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