A control method based on decoupling and multi-port to realize flexible regulation of electric energy in multi-distribution partitions
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A control method and multi-port technology, applied in the direction of control/regulation systems, electrical components, circuit devices, etc., can solve the problems existing in the continuous and controllable adjustment of electric energy that are not easy to achieve, improve stability and reliability, and improve fault-tolerant performance. and continuous power supply capability, the effect of improving performance
Active Publication Date: 2021-10-26
HARBIN ENG UNIV
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[0004] To sum up, there are many problems in the existing technology that it is difficult to achieve continuous controllable adjustment of electric energy, and the switching can only exist between distribution buses of the same voltage level.
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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] The present invention provides a control strategy based on decoupling and multi-ports to realize flexible regulation of electric energy in multiple power distribution zones (this patent is four ports, and can be extended to more ports). Each port of the multi-port converter is connected to an independent power distribution partition, and the multi-port converter is used as an energy exchange center to realize energy transfer between multiple power distribution partitions. Through the control of the multi-port converter, each The voltage of each distribution zone is maintained within its normal operating range. When a power distribution partition fails or is overloaded, the power distribution partition with power redundancy will transmit electric power to it under the condition of ensuring its own stable operation, so as to maintain the normal operation of the en...
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Abstract
The invention belongs to the field of power electronics technology research, and specifically relates to a control strategy based on decoupling and multi-ports to realize flexible regulation of electric energy in multiple power distribution partitions, including: designing a current controller G according to the specific performance requirements of the system AC , G BC , G CC , G DC and voltage controller G AU1 , G AU2 , G AU3 , G BU1 , G BU2 , G BU3 , G CU1 , G CU2 , G CU3 , G DU1 , G DU2 , G DU3 ;According to the stable state of the power distribution partitions, set the stable operating voltages of the DC buses of the power distribution partitions A, B, C, and D as u AN , u BN , u CN , u DN , set the upper and lower thresholds of the DC bus voltage for stable operation of the middle common port E as u HE and u LE , and the driving signal phases of the full-bridge converters FBE1 and FBE2 in the common port E are zero phase; the new multi-port DC power distribution system proposed in this patent can improve the stability and reliability of the power distribution system, and improve the power distribution system Fault-tolerant performance and continuous power supply capability realize automatic and flexible transmission of electric energy between various power distribution partitions.
Description
technical field [0001] The invention belongs to the field of power electronics technology research, and in particular relates to a control strategy based on decoupling multi-ports to realize flexible regulation of electric energy in multiple power distribution partitions. Background technique [0002] With the development of urban technology, the improvement of urban management level and the further advancement of the concept of smart city, the disadvantages of the traditional distribution network planning model are gradually exposed, especially the distribution network planning in the urban center area has been difficult to meet the development requirements of modern urban power grids. The main manifestations are that the current site layout is not reasonable enough, the power pipeline is tight, the development of power distribution automation is lagging behind, and the urban ecological environment is not compatible. Urban distribution network planning has entered the stage...
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