Power distribution method of direct current power distribution system of intelligent building

Abstract

The invention provides a power distribution method of a direct current power distribution system of an intelligent building. The direct current power distribution system comprises a power distributioncurrent transformer, a direct current bus, a distributed energy source, an energy storage unit, a load and a port current transformer. The power distribution current transformer transforms alternating current into direct current and then the direct current is connected to the direct current bus. The distributed energy source, the energy storage unit and the load are connected to the direct current bus through the port current transformer. The method comprises steps of fusion of virtual motor control in the port current transformer and autonomous control of the port current transformer. According to the invention, by adopting the virtual synchronous motor control strategy, the virtual direct current motor control strategy is adopted in the direct current port current transformer, so the transformers are perfectly unified in control; through the inertia and damping performance of the virtual motor, the ability for coping with the disturbance of the direct current power distribution system is improved; and through the outer characteristics of the virtual motor, each current transformer is allowed to share power according to the rated capacity in the bus voltage fluctuation process ofthe direct current power distribution system, so the stability ability of the direct current voltage is improved.

Description

technical field [0001] The invention relates to a DC power distribution system, in particular to a power distribution method of an intelligent building DC power distribution system with access to distributed power sources and energy storage. Background technique [0002] With the gradual depletion of petrochemical energy worldwide and people's increasing concern about environmental pollution, smart building power supply solutions have attracted widespread attention. Statistics show that 70% of the electrical energy is consumed in buildings, which shows that building energy saving is of great significance. The green power business model has gradually led to the rapid development of decentralized access to new energy with buildings as the carrier. Compared with the AC power distribution scheme, the DC power distribution scheme of the intelligent building has more important significance: DC power distribution can avoid the power quality problems such as reactive power and harm...

AI Technical Summary

Problems solved by technology

When the equipment mounted on the DC bus of the DC power distribution system is put into or removed, it will cause the disturbance of the DC bus, and the fluctuation of the power of the mounted equipment will also cause the disturbance of the DC bus, which reduces the stability of the DC bus voltage.

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