Method for emergency support of medium-voltage looped network for traction network of bidirectional converter system

• Main Authors: WANG PEIPEI, HE BIN, ZHANG HUAZHI, HE JUNWEN, ZUO CHAO, WANG KAIKANG, GONG MENGRONG, ZHONG JUN, ZHAN BO, DENG XIAOXUN
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2024
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a method for emergency support of a medium-voltage looped network for a traction network of a bidirectional converter system, and the method comprises the steps: obtaining the related parameters of a bidirectional converter unit in an isolated fault power supply zone and a non-fault power supply zone; determining the power limit of the support interval traction network; and determining a power supply support scheme according to the related parameters of the bidirectional converter unit in the fault power supply partition and the non-fault power supply partition. According to the invention, the dual functions of rectification and inversion of the bidirectional converter are utilized, and under the extreme working condition of power loss of two high voltages of a medium-voltage looped network in the head and tail power supply subareas of the urban rail power supply system, the support power supply of the step-down substation in the fault subarea is completed through the traction network