Parallel side compensation optimal-allocation control device and method for MMC (modular multilevel converter (MMC) type UPQC (unified power quality conditioner)
A technology for optimizing distribution and control devices, applied in reactive power compensation, harmonic reduction devices, reactive power adjustment/elimination/compensation, etc., can solve the unreasonable output of converters on the parallel side of UPQC and the inability to efficiently use UPQC parallel connection Problems such as current quality problems of side converters
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[0088] The specific examples of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0089] The technical problem to be solved by the present invention is to aim at the simultaneous occurrence of harmonics, reactive power and non-linear loads in users on the load side of medium-voltage feeders caused by flexible and changeable power electronic components and a large number of non-linear loads in the current power system. The phenomenon of balanced current causes MMC-type UPQC parallel-side converters to operate under overload conditions. An optimal control problem for the redistribution of the actual output harmonics, reactive power and unbalanced current components of the parallel-side converters is proposed.
[0090] The invention uses the PSCAD / EMTDC software platform to construct a medium-voltage AC distribution network system, a load, an MMC-type UPQC simulation topology structure, and an operation module and an o...
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