System and method for multi-energy convergence coordinated control

Abstract

The invention discloses a system and method for multi-energy convergence coordinated control. The system for multi-energy convergence coordinated control comprises a direct current bus, a first alternating current / direct current converter, a second alternating current / direct current converter, a bi-directional direct current / direct current converter, a third alternating current / direct current converter, a coordinating controller, a current / voltage detection device, a direct current / direct current converter capable of being externally connected with a direct-current load, and a direct current / alternating current converter capable of being externally connected with an alternating current load, wherein the coordinating controller can be used for receiving data information transmitted by the current / voltage detection device to generate corresponding voltage control signals and transmits the signals respectively to the corresponding first alternating current / direct current converter, the second alternating current / direct current converter, the bi-directional direct current / direct current converter, the third alternating current / direct current converter, the direct current / direct current converter and the direct current / alternating current converter. The system and method for multi-energy convergence coordinated control can carry out convergence control on input multiple paths of alternating current / direct current power supplies, coordinates voltage conversion modules of the power supplies by utilizing the coordinating controller, adjusts the voltage method of the direct current bus, tracks the maximum power point of a photovoltaic array, and lowers operating cost.

Description

technical field [0001] The invention relates to a multi-energy confluence coordinated control system and a control method thereof, which belong to the field of power electronics and automatic control, and can be applied to optimize management of various energy sources in a DC microgrid and support energy in an inverter in an AC microgrid Optimize management. Background technique [0002] At present, with the gradual depletion of conventional energy and the increasing environmental pollution, countries around the world are strengthening the development and utilization of clean and efficient renewable energy to solve energy problems in future social and economic development. Microgrids are distributed electricity (including renewable energy) ) grid connection provides an important form of network organization. At present, microgrids can be divided into DC microgrids and AC microgrids according to the form of power transmission. Microgrids are essentially a small power system i...

AI Technical Summary

Problems solved by technology

Since there are many energy sources in the micro-grid and their characteristics are different, the coordinated management of energy is very important. The coordinated management of energy is not only related to the utilization rate of renewable energy, but also related to the stability of the micro-grid. Currently, in the DC micro-grid Most of them use the method of coordinating various energy sources to maintain a fixed DC bus voltage, the control is more complicated, and the equipment cost is relatively high, while the energy supporting the inverter in the AC microgrid is relatively simple, and the method of fixing the DC bus voltage is also used to control The incoming power supply is managed

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