Subsynchronous oscillation method and apparatus for static synchronous series compensator suppression system

• Main Authors: SONG JIEYING, SONG FANGFANG, WANG XUDONG, LU ZHENGANG, YAO JUN, WEI ZHIYONG, DENG ZHANFENG, ZHAO GUOLIANG, WEI LIANBIN, CAI LINHAI, LI GUODONG
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2017
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a subsynchronous oscillation method and apparatus for a static synchronous series compensator suppression system. The subsynchronous oscillation method comprises the steps of taking an included angle between an SSSC (static synchronous series compensator) output voltage and an alternating current circuit current, and modulation ratio of the SSSC as generator influencing parameters by the SSSC according to a system linear model of an SSSC-containing single-machine infinite-bus system; taking voltage frequency deviation and active power flow of an SSSC apparatus mounting point as SSSC modulation ratio influencing parameters; taking the voltage frequency deviation and active power flow of the SSSC apparatus mounting point as input to establish a transfer function of a damping controller, wherein the voltage frequency deviation and the active power flow of the SSSC apparatus mounting point are taken as input of the damping controller; and optimizing control parameters of the transfer func