A Multiport Energy Router for DC Microgrid
A technology of DC micro-grid and router, which is applied in the direction of load balance in DC network and parallel operation of DC power supply, etc. It can solve the problems of volatility and intermittent instability, lack of standardization, complex control, etc., and achieve the effect of improving energy utilization efficiency
Active Publication Date: 2019-07-05
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
Chinese patent CN102780267A discloses a power router that uses a switch array to form an energy flow channel. The control is complicated. If a single switch fails, it will affect the overall situation.
However, due to the characteristics of geographical dispersion, discontinuous production, randomness, volatility, and intermittent instability of most distributed renewable energy sources, the ports connected to the DC distribution network are scattered, the voltage levels are diverse, and there is no standardization.
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0033] A multi-port energy router for a DC microgrid, the router includes a DC bus DC-Bus, a grid-connected switch S, routing ports Interface 1 to Interface N, a control chip, a port sensor acquisition and processing circuit, and a DC-Bus sensor acquisition and processing circuit circuit, port switch drive circuit, grid-connected switch S drive circuit and communication circuit.
[0034] The DC bus DC-Bus is composed of DC positive and negative buses, and the two ends of the grid-connected switch S are connected in series on the DC positive bus to realize the connection between the DC micro-grid and the energy router; each routing port Interface 1 to Interface N is connected in parallel On the DC positive and negative buses; the port sensor acquisition and processing circuit collects the voltage and current signals of the routing port, and then sends th...
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The present invention provides a multi-port energy router for a DC micro network, relating to the technical field of energy Internet control. The invention provides a new scheme for connecting distributed renewable energy power generation equipment, energy storage equipment and an electrical load to an energy Internet, and a new energy routing mode is provided. The energy router provided by the invention has multiple routing ports and can connect a variety of power generation equipment, energy storage equipment, electrical loads at the same time, the energy flow between different equipment is realized, and the energy utilization efficiency is improved. A multi-functional routing port is designed, the unification and standardization of the DC bus voltage of the energy router are facilitated, and different voltage level requirements are satisfied. The invention is applicable to the networking of the energy Internet, firstly distributed renewable energy generation equipment is connected to a low-voltage DC microgrid, and then according to the different voltages and power demands, after a commutation link, the equipment is connected to the DC and AC power grids with high voltage levels.
Description
technical field [0001] The invention relates to the technical field of energy Internet control, in particular to an energy router. Background technique [0002] Aiming at the challenges faced by the Energy Internet in terms of energy access, energy control, and energy transmission, and referring to the design concept of the data exchange device "router" in the Internet, the concept of an "energy router" that can realize energy network interconnection, scheduling, and control is designed. was raised. The energy router is the key technology of the Energy Internet. It is based on the existing power grid, based on advanced power electronics technology and information network technology, providing flexible and diverse electrical interfaces, and realizing a large number of distributed renewable energy generation equipment and energy storage equipment. 1. Various electric loads are connected to the grid, and have communication and intelligent decision-making capabilities, and real...
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IPC IPC(8): H02J1/10H02J1/14
CPCH02J1/10H02J1/14
Inventor 骆光照方学礼万浩刘凯李仑升冀星昌
Owner NORTHWESTERN POLYTECHNICAL UNIV