Distributed optical energy storage participated bus regulation self-adaptive control device and method

Abstract

The invention provides a distributed optical energy storage participated bus regulation self-adaptive control device and method. The device comprises a photovoltaic battery module, an energy storage module, a DC (direct current) converter and an inverter, wherein the photovoltaic battery module is connected with the DC converter; the DC converter is connected with the inverter after being connected in parallel with the energy storage module; the inverter is connected with a bus; the DC converter is used for regulating the electrical power output of the photovoltaic battery module according to the current capacity of the energy storage module and the electricity state of the bus; the inverter is used for controlling to output electrical energy to the energy storage module and / or the bus according to the current capacity of the energy storage module and the electricity state of the bus; the energy storage module is used for storing or releasing electrical energy. Therefore, the distributed optical energy storage participated bus regulation self-adaptive control device adaptively participates in regulation of the bus and improves the operation stability of the bus.

Description

Technical field [0001] The invention relates to an adaptive control device and method for distributed optical energy storage participating in bus regulation, belonging to variable current control technology. Background technique [0002] As the penetration rate of distributed power sources in the power system continues to increase, since most new energy sources are intermittent and uncontrollable, and the conventional distributed grid-connected power generation control mostly adopts the power electronic grid-connected inverter mode. It does not reflect the inherent inertia and frequency and voltage control characteristics of conventional power systems, which makes the bus stability problem more severe. Moreover, distributed photovoltaic power generation is affected by the meteorological environment, and the output does not have regularity. After being connected to the public bus, it will cause local bus fluctuations and instability, especially in areas where the bus structure is ...

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Problems solved by technology

[0002] As the penetration rate of distributed power in the power system continues to increase, since most new energy sources are intermittent and uncontrollable, and conventional distributed grid-connected power generation control mostly adopts the power electronic grid-connected inverter mode, this mode does not It does not reflect the inherent inertia and frequency modulation and voltage regulation control characteristics of conventional power systems, which makes the busbar stability problem more serious

Moreover, distributed photovoltaic power generation is affected by the meteorological environment, and its output is not regular. After connecting to the public bus, it will cause fluctuations and instability in the local bus, especially in areas with weak bus structures. The power quality of the

In the independent power supply mode of the distributed power supply and the energy storage system, the load and the distributed power supply rely on the coordinating controller to operate jointly, which cannot quickly adjust the matching relationship between the power supply and the load, making the energy storage system in an overload operation state and affecting the life of the energy storage system Safe and reliable operation with the system

[0003] At present, the research on energy storage's participation in the coordinated control strategy of new energy is mainly concentrated in the application field of large-scale wind farms and photovoltaic power stations connected to the main grid, or the application field of a small amount of wind power, photovoltaic, and diesel power connected to the microgrid. For distributed photovoltaic systems There are few studies on large-scale access to distribution busbars, and most of them use dispatching control to operate passively

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