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Real-time computing method for equivalent capacity of SEDC (supplementary excitation damping controller) and STATCOM (static synchronous compensator)

A technology of static synchronous compensation and excitation damping, which is applied to the control system, generator control, power generation through control, etc., can solve the problem of not giving SEDC and STATCOM capacity calculation methods, not mentioning joint suppression measures, and lack of calculation methods, etc. question

Inactive Publication Date: 2015-02-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Application Information

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Problems solved by technology

None of the existing engineering practice and theoretical research mentions joint suppression measures, nor does it give a calculation method for the capacity of SEDC and STATCOM. Therefore, there is a lack of accurate calculation methods for the selection of suppression measures and the comparison of suppression measures in terms of economy.

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  • Real-time computing method for equivalent capacity of SEDC (supplementary excitation damping controller) and STATCOM (static synchronous compensator)
  • Real-time computing method for equivalent capacity of SEDC (supplementary excitation damping controller) and STATCOM (static synchronous compensator)
  • Real-time computing method for equivalent capacity of SEDC (supplementary excitation damping controller) and STATCOM (static synchronous compensator)

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Embodiment Construction

[0028] The purpose of the present invention is to provide a real-time calculation method of the equivalent capacity of the excitation damping controller and the static synchronous compensator. The method includes SEDC electrical damping calculation and related parameter calculation, STATCOM electrical damping calculation and related parameter calculation, SEDC and STATCOM controller gains are adjusted based on electrical damping, and SEDC and STATCOM equivalent capacity are calculated by using the adjusted SEDC and STATCOM. The calculation method will be specifically described below.

[0029] 1. Calculate the electrical damping of the SEDC

[0030] The method for calculating the capacity of the present invention is based on the electrical damping of SEDC and STATCOM, so the electrical damping of SEDC and STATCOM should be calculated firstly, and the restraining ability of both should be quantitatively evaluated.

[0031] figure 1 The principle of SEDC suppression of subsynch...

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Abstract

The invention relates to a real-time computing method for equivalent capacity of an SEDC (supplementary excitation damping controller) and an STATCOM (static synchronous compensator). The real-time computing method includes the following steps of computing electrical damping of the SEDC; computing electrical damping of the STATCOM; setting gain relationship of controllers of the SEDC and the STATCOM according to the electrical damping of the SEDC and the STATCOM; subjecting the controllers of the SEDC and the STATCOM to setting according to the set gain relationship, and then computing the equivalent capacity of the SEDC and the STATCOM under the same disturbance.

Description

technical field [0001] The invention belongs to the technical field of turbogenerator calculations, and in particular relates to a real-time calculation method for the equivalent capacity of an excitation damping controller and a static synchronous compensator. Background technique [0002] Static synchronous compensator (STATCOM) is a primary device, which directly injects current into the generator, with fast response and obvious suppression effect. The capacity of STATCOM is large enough to well suppress the accumulation of shafting fatigue caused by small disturbances in the system , under the condition of large disturbance, the modal component can also be rapidly attenuated below the cumulative threshold of shafting fatigue. However, the cost of STATCOM is high, and it is installed at the machine end, and it must be shunted to the system and power plant variable load side, so the required capacity is larger. The cost of 20MVA STATCOM is more than 10 million, and it occu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00
CPCH02P9/006H02P9/008
Inventor 毕天姝李景一肖仕武张鹏毛雨亭
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)