Title:
METHOD AND SYSTEM FOR SUPPRESSING LOW-FREQUENCY OSCILLATION
Document Type and Number:
WIPO Patent Application WO/2024/067120
Kind Code:
A1
Abstract:
A method and system for suppressing low-frequency oscillation. The system comprises a frequency modulation control loop and an oscillation suppression loop, wherein the oscillation suppression loop comprises an oscillation determination unit, a function switching switch and a functional unit. The oscillation determination unit is configured to: perform low-frequency oscillation determination according to an actual unit power output by the frequency modulation control loop and a unit-side frequency signal; control, in response to the fact that low-frequency oscillation does not occur, the function switching switch to connect frequency difference functions F1(x) and F2(x) and the frequency modulation control loop, such that the unit-side frequency signal is input into the frequency modulation control loop after the unit-side frequency signal passes through the frequency difference functions F1(x) and F2(x); and control, in response to the fact that low-frequency oscillation occurs, the function switching switch to select a function in the functional unit according to a low-frequency oscillation intensity level. The functional unit is configured to process the unit-side frequency signal after the unit-side frequency signal passes through frequency difference functions F1(x) and F2(x), and input the processed unit-side frequency signal into the frequency modulation control loop, so as to realize low-frequency oscillation suppression.
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Inventors:
LIU LEI (CN)
YANG ZHENYONG (CN)
KANG JINGQIU (CN)
GAO MINGSHUAI (CN)
XING ZHIWEI (CN)
YOU MO (CN)
CHEN ZHENSHAN (CN)
MA NING (CN)
LI ZHAN (CN)
LAI LIANKUN (CN)
SHANG YONG (CN)
GAO AIGUO (CN)
SHI CHUNHONG (CN)
YANG ZHENYONG (CN)
KANG JINGQIU (CN)
GAO MINGSHUAI (CN)
XING ZHIWEI (CN)
YOU MO (CN)
CHEN ZHENSHAN (CN)
MA NING (CN)
LI ZHAN (CN)
LAI LIANKUN (CN)
SHANG YONG (CN)
GAO AIGUO (CN)
SHI CHUNHONG (CN)
Application Number:
PCT/CN2023/118761
Publication Date:
April 04, 2024
Filing Date:
September 14, 2023
Export Citation:
Assignee:
NORTH CHINA ELECTRIC POWER RES INSTITUTE CO LTD (CN)
STATE GRID CORP CHINA (CN)
STATE GRID CORP CHINA (CN)
International Classes:
H02J3/24
Domestic Patent References:
| WO2014059870A1 | 2014-04-24 |
Foreign References:
| CN115912392A | 2023-04-04 | |||
| CN105098803A | 2015-11-25 | |||
| CN110224394A | 2019-09-10 | |||
| CN103311939A | 2013-09-18 | |||
| CN110571830A | 2019-12-13 | |||
| CN204741274U | 2015-11-04 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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