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A Real-time Calculation Method of Equivalent Capacity of Excitation Damping Controller and 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 no mention of joint suppression measures, lack of calculation methods, and no calculation method of SEDC and STATCOM capacity, etc. question

Inactive Publication Date: 2017-06-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • 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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  • A Real-time Calculation Method of Equivalent Capacity of Excitation Damping Controller and Static Synchronous Compensator
  • A Real-time Calculation Method of Equivalent Capacity of Excitation Damping Controller and Static Synchronous Compensator
  • A Real-time Calculation Method of Equivalent Capacity of Excitation Damping Controller and Static Synchronous Compensator

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Embodiment Construction

[0027] The purpose of the present invention is to provide a real-time calculation method for the equivalent capacity of an excitation damping controller and a static synchronous compensator. The method includes SEDC electrical damping calculation and related parameter calculations, STATCOM electrical damping calculation and related parameter calculations, SEDC and STATCOM controller gains are adjusted based on electrical damping, and SEDC and STATCOM equivalent capacities are calculated using the adjusted SEDC and STATCOM. The calculation method will be described in detail below.

[0028] 1. Calculate the electrical damping of SEDC

[0029] The method for calculating the capacity of the present invention is based on the electrical damping of SEDC and STATCOM. Therefore, the electrical damping of SEDC and STATCOM must be calculated separately first, and the suppression ability of the two should be quantitatively evaluated.

[0030] figure 1 The principle of SEDC's suppression of sub...

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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 calculation of turbo-generator sets, and in particular relates to a real-time calculation method for equivalent capacities of an excitation damping controller and a static synchronous compensator. Background technique [0002] The static synchronous compensator (STATCOM) is a primary device that directly injects current into the generator with fast response speed and obvious suppression effect. The capacity of STATCOM is large enough to well suppress the accumulation of shaft fatigue caused by small disturbances in the system. Under large disturbance conditions, the modal component can also be quickly attenuated below the cumulative threshold of shaft fatigue. However, the cost of STATCOM is high. When installed at the machine end, it must be diverted to the system and the variable load side of the power plant. Therefore, the required capacity is larger. The 20MVA STATCOM costs more than 10 million yuan and co...

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Application Information

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Patent Type & Authority Patents(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)