IMPROVEMENTS IN OR RELATING TO CONTROLLERS FOR CHAIN-LINK CONVERTERS

• Main Authors: NOLAN ANDREW, WAN JIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2023
• 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; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

In the field of controllers for chain-link converters having a plurality of chain-link modules connected in series that can be operated in combination to provide a step variable voltage source, there is a need for improved controllers. A controller (10) for a chain-link converter having a plurality of chain-link modules connected in series operable in combination to provide a step variable voltage source, the controller is programmed to obtain, for each chain link module (12), an indication (22) of whether a current flow through the corresponding chain link module (12) is in a first flow direction or a second flow direction. The controller (10) is additionally programmed to assess the number of indications (22) in the first flow direction and the number of indications (22) in the second flow direction; and thereafter establishing (36) a total current flow direction (38) through the chain-link converter equal to the flow direction with the maximum number of indications (22). 在用于链式链路转换器(具有可组合操作以提供阶跃可变电压源的多个串联连接