Self-excitation starting system and self-excitation starting method for static synchronous series compensator

• Main Authors: SONG JIEYING, SONG FANGFANG, LU ZHENGANG, WEI ZHIYONG, YU JIANCHENG, ZHAO GUOLIANG, CAI LINHAI, LIU YUN, HUO XIANXU
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; 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 self-excitation starting system and a self-excitation starting method for a static synchronous series compensator. The system comprises a first circuit breaker which is mounted on an alternating-current bus of an external alternating-current system, a winding on one side of a transformer is parallelly connected to two sides of the first circuit breaker through an alternating-current side switch, and a winding on the other side of the transformer is parallelly connected to two sides of a bypass thyristor. The bypass thyristor is parallelly connected to two sides of a second circuit breaker which is connected with a filter, and the filter is connected with a series converter which is connected with a controller. According to the technical scheme, a cascaded H-Bridge multi-level structure based SSSC (static synchronous series compensator) system mathematic model is derived, single-phase phase-locked loops and novel two-stage direct-current voltage stabilizing strategies are designed, a