Distributed low-voltage direct-current power supply network topology structure

Abstract

The invention discloses a distributed low-voltage direct-current power supply network topology structure, which comprises an alternating-current power supply module, a plurality of first direct-current power supply systems, a plurality of second direct-current power supply systems and a plurality of distributed modules, and is characterized in that the alternating-current power supply module comprises a first alternating-current power supply unit and a second alternating-current power supply unit; the first alternating-current power supply unit and the second alternating-current power supply unit are connected through an alternating-current interconnection switch; and the first end of each distributed module is connected with the first alternating-current power supply unit or the second alternating-current power supply unit, the second end is connected with the first direct-current power supply system, and the third end is connected with the second direct-current power supply system. The alternating-current power supply module, the distributed modules and the direct-current power supply systems all adopt power redundancy and network structure mutual backup, so that the reliability of DC power supply of the transformer substation and DC power supply of the data center is improved.

Description

technical field [0001] The invention relates to the field of DC power supply systems in smart energy substations, in particular to a distributed low-voltage DC power supply network topology. Background technique [0002] The State Grid Corporation of China is currently focusing on the construction of the ubiquitous power Internet of Things. Substations are the core resources of power grid enterprises and play an important pivotal role in undertaking power transmission and distribution and regional power supply. Relying on widely distributed substations, the construction of smart energy stations integrating various functional modules such as substations, energy storage stations, data center stations, photovoltaic stations, and charging stations is a key component of the ubiquitous power Internet of Things. [0003] While integrating energy storage stations, data center stations, photovoltaic stations and charging stations, smart energy stations face the technical problem of h...

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Problems solved by technology

[0005] (1) The power consumption of a single micro-module in the data center is relatively large, and the power supply voltage of DC 240 is used. Due to the limited capacity, it is also necessary to build multiple centralized power supply modules of the same scale to meet the power demand of the data center.

[0006] (2) The DC bus needs to independently allocate energy storage units to the power supply system, which cannot be included in the overall planning of the energy storage station. Compared with the traditional UPS method, only the original lead-acid battery is replaced with the same lithium battery as the energy storage station. , did not achieve the goal of integrating the energy storage station with the data center UPS

[0007] (3) The centralized solution also needs to be separately configured for large-capacity substation transformers in the data center, which cannot be reasonably matched with the modular construction of the IT equipment micro-modules in the data center, which will inevitably lead to an expansion of investment and a reduction in the utilization rate of equipment

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