Reactive power flexible control method for series-parallel electric energy router

Abstract

The invention relates to the technical field of power electronic converters, in particular to a reactive power flexible control method for a series-parallel electric energy router, which comprises the following steps of: 1, calculating active power and reactive power of a load; 2, calculating a reactive power configuration angle; step 3, establishing a reactive power configuration angle and a constraint range of the reactive power of the series converter; 4, performing closed-loop control on the output AC bus voltage to obtain a parallel converter modulation signal; 5, the reactive power configuration angle obtained in the step 3 is loaded into the modulation signal obtained in the step 4, the step 2 serves as a first improvement, and reactive power double-channel flexible control can be achieved between series converters and parallel converters in the electric energy router; step 3, as a second improvement, voltage at two ends of the transformer and transmitted reactive power can be ensured to operate in an allowable range, and safe operation of the system is guaranteed; the defect that reactive power in an existing electric energy router can only be transmitted through a single channel and cannot be flexibly configured is overcome from the perspective of a control method.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a reactive power flexible control method for series-parallel electric energy routers. Background technique [0002] The Energy Internet takes electric energy as the energy core and information technology as the interconnection basis to build a wide-area interconnection of units such as integrated power systems, distributed energy, energy storage equipment, oil, natural gas, transportation, heating and cooling, and various types of loads. system to realize multi-source energy mutual conversion, global sharing and optimal scheduling. Among them, the Electric Energy Router (EER) is a key device of the Energy Internet, which can provide plug-and-play electrical interfaces for power systems, distributed energy, energy storage equipment, AC and DC loads, etc. Comprehensive control and coordinated management of electric energy. At present, there are mainly two EER ...

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Problems solved by technology

[0005] For this reason, on the basis of the circuit topology disclosed in the above-mentioned Chinese invention patent CN202011322000, the present invention further proposes a flexible reactive power control method to form a complete operating system from the circuit topology to the control method. From the perspective of the control method It overcomes the shortcomings of the existing power routers that reactive power can only be transmitted by a single channel and cannot be flexibly configured

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