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This guide applies to self-commutated electronic power converters in which commutation is accomplished by components within the converter. In converters using switching devices that have turn-off capability, such as transistors or gate turn-off thyristors, interruption of the current results in a voltage that commutates the current to another branch. In converters using circuit-commutated thyristors, the commutating voltages required to transfer current from one branch to another are normally supplied by capacitors. The type of power conversion may be DC to AC, DC to DC, AC to DC, or AC to AC. Converters in which commutating voltages are supplied by the AC lines, the AC load, or some other AC source outside the converter, are excluded from the scope of this guide except where they may be linked with a self-commutated converter.

Electric current converters.

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The electrical, mechanical, and physical requirements of oil-immersed single-phase and three-phase converter transformers are specified in this standard. Tests are described and test code defined. Devices such as arc furnace transformers and rectifier transformers for industrial or locomotive applications are not covered.

Electric current converters.

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Electric current converters

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The application of control and protection on a unified power flow controller (UPFC) using a modular multilevel converter (MMC) is specified in this guide, including application considerations, protection functions and performance, control strategies, and monitoring functions, as well as test and commissioning approaches. This guide can be used as the basis for the design, manufacture, testing, and commissioning of UPFC control and protection systems, benefiting both utilities and manufacturers.

Electric current converters.

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In this thesis, the use of voltage-source active filters for harmonic mitigation of grid-connected power converters is proposed. Based on a modeling of this novel converter configuration, an operating strategy is derived to accomplish this task with low control bandwith, low passive filtering effort, and high efficiency with only a small increase in installed semiconductor power.

Electric current converters.