Change of current return path in a bipole power transmission system

An arrangement for changing current return path in a bipole direct current power transmission system comprises a converter station (10) having an active and a passive converter (14, 16) connected in series between an active and a passive pole line (P1, P2) via a first neutral bus (NB1), a metallic r...

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Bibliographische Detailangaben
Hauptverfasser:	BJORKLUND PER-ERIK, SHEARER DAVID, SOBRINHO FELIPE, AVILA HECTOR-ARMANDO, HOLMGREN TOMMY, NYBERG SOREN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	An arrangement for changing current return path in a bipole direct current power transmission system comprises a converter station (10) having an active and a passive converter (14, 16) connected in series between an active and a passive pole line (P1, P2) via a first neutral bus (NB1), a metallic return transfer switch (30) in an electrode line (L1), a ground return transfer switch (24) in a current redirecting path (CRDP1) between the passive pole line (P2) and the neutral bus (NB1) and a control unit (40) which in case of change to the passive pole line (P2) for providing a return current path is configured to, upon control of power related to the active converter (14) from steady-state to zero, close the ground return transfer switch (24) and thereafter open the metallic return transfer switch (30), whereupon power related to the active converter (14) may be controlled back to steady state. 种用于在双极直流功率传输系统中改变电流返回路径的装置包括换流器站(10)，该换流器站(10)具有经由第中性母线(NB1)在有源与无源极线(P1，P2)之间串联连接的有源和无源换流器(14，16)；在电极线(L1)中的金属返回转换开关