Production of a real power equilibrium of the phase modules of a converter

US8144489B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Mike Dommaschk · Guteborn, DE
• Jörg Dorn · Buttenheim, DE
• Ingo Euler · Erlangen, DE
• Jörg Lang · Stadtsteinach, DE
• Quoc-Buu Tu · Roßtal, DE
• Klaus Würflinger · Koblenzer Straße, DE

Key dates

• Filing date: Dec 8, 2006
• Grant date: Mar 27, 2012
• Expiry date: Feb 22, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E40/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A converter has at least one phase module, an AC voltage terminal and a DC voltage terminal. A phase module branch is formed between each DC voltage terminal and each AC voltage terminal. Each phase module branch has a series circuit containing submodules which each have a capacitor, a power semiconductor, and submodule sensors for detecting energy stored in the capacitor and with a regulation device for regulating the apparatus in dependence on energy values and predetermined desired values. Therefore unbalanced loading of the energy storage units is avoided. The regulation device has a summation unit for summing the energy values while obtaining branch energy actual values and a device for calculating circuit current desired values in dependence on the branch energy actual values. The regulation device compensates for imbalances in the branch energy actual values in dependence on the circuit current desired values.