US 2025/0087982 A1Published application

Voltage source type direct-current ice melting apparatus, flexible interconnection system and control method

AssigneeElectric Power Research Institute. China Southern Power Grid

InventorsYan XIONG, Yuebin ZHOU, Shukai XU, Wanyu CAO, Chuang FU

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Abstract

A voltage source type direct-current ice melting apparatus, a flexible interconnection system and a control method are provided. The voltage source type direct-current ice melting apparatus includes a starting unit, a modular multi-level converter and a measurement control unit. The flexible interconnection system includes two voltage source type direct-current ice melting apparatuses having the same circuit structure. The measurement control unit acquires set values, that are input by a user, of relevant parameters and then processes the set values, that are input by the user, of the relevant parameters and measured values, measured in real time by the measurement control unit, of the relevant parameters, thereby determining and sending a control signal, so as to control an operating state of the modular multi-level converter in the apparatus or system.

Claims20

Dependent claims

A voltage source type direct-current ice melting apparatus, comprising:

a starting unit;
a modular multilevel converter;
and
a measurement control unit;
wherein
a terminal of the starting unit is connected to an alternating-current power supply terminal, another terminal of the starting unit is connected to an alternating-current input terminal of the modular multilevel converter, the starting unit is configured to connect the modular multilevel converter to an alternating-current power supply via the alternating-current power supply terminal, and a direct-current output terminal of the modular multilevel converter is connected to a to-be-melted line in a case that the voltage source type direct-current ice melting apparatus operates in a direct-current ice melting mode;
and
the measurement control unit is connected to the modular multilevel converter, and the measurement control unit is configured to obtain a measurement value of an electrical parameter of the direct-current output terminal of the modular multilevel converter, determine a control signal based on the measurement value of the electrical parameter and a predetermined value of the electrical parameter, and control an operation state of the modular multilevel converter based on the control signal.

5 more elements

Dependencies are inferred from the claim text.