Optical storage DC power supply system based on coordination control device

Abstract

The invention discloses an optical storage DC power supply system based on a coordination control device. The optical storage DC power supply system comprises a field equipment layer, a network communication layer and a station control management layer. The field equipment layer comprises a distributed photovoltaic power generation unit, a lead-acid battery energy storage unit and a load unit, wherein the distributed photovoltaic power generation unit and the lead-acid battery energy storage unit are accessed to a DC bus by means of a DC / DC converter. The network communication layer is equipped with the coordination control device, which acquires operation data of a grid-connected current transformer, the DC / DC converter and the load unit, packages the acquired data and uploads the data to a host server of the station control management layer, and performs remote metering, remote control and remote regulation on parameters of equipment of the field equipment layer through issuing messages. The distributed photovoltaic power generation unit, the lead-acid battery energy storage unit and the grid-connected current transformer can operate according to instructions of the optical storage coordination control device. The optical storage DC power supply system can meet the requirement of guaranteeing stability of the DC bus under the operating conditions of power outage of an AC power supply, input fluctuation of photovoltaic power generation, load switching and the like.

Description

technical field [0001] The invention relates to an optical-storage DC power supply system based on a coordinated control device, and belongs to the technical field of DC power supply. Background technique [0002] Under the dual pressure of energy shortage and environmental pollution, new energy power generation technology has made great progress in research, development and utilization. Building a smart grid and improving the safety, stability, reliability and power quality of the power system are the future development. trend. Among new energy power generation technologies, wind power and photovoltaic power generation have attracted much attention. However, wind power and photovoltaic power generation are affected by seasons, weather and geographical conditions, and have obvious discontinuity and instability. The generated power fluctuates greatly and is poor in adjustability. Energy storage systems play an important role in the off-grid operation of photovoltaic and win...

AI Technical Summary

Problems solved by technology

In the event of an AC power grid failure, the power balance unit is lost during the current-limited operation of the DC / AC converter, relying on the upper-layer energy management and centralized control system, the power coordination control of the system cannot be realized, which will affect the stable operation of the system

Images