Adaptive interference compensation passive control method of micro-grid hybrid energy storage system

Abstract

The invention relates to an adaptive interference compensation passive control method of a micro-grid hybrid energy storage system. The micro-grid hybrid energy storage system comprises a super capacitor and a storage battery, the super capacitor and the storage battery are connected in parallel to a direct current bus through a bidirectional DC-DC converter to form an energy bidirectional loop. The control method concretely comprises the steps of: acquiring a control signal of a bidirectional DC-DC converter by employing a dual-ring control mode of inner ring current passive control and outerring voltage passive control to stabilize the voltage of the direct current bus, wherein theoretical reference current values of charge and discharge of the energy storage system are generated through the outer ring voltage passive control, the inner ring current passive control allows the charge-discharge current of the energy storage system to reach a current reference value and generates the control signal of the converter, and the current reference value is obtained based on adaptive interference compensation correction. Compared to the prior art, the adaptive interference compensation passive control method of the micro-grid hybrid energy storage system can have good robustness in the conditions that the modeling parameters are not accurate of the micro-grid comprising the energy storage system and the parameters of the system are changed and interfered by the outside.

Description

technical field [0001] The invention relates to a micro-grid hybrid energy storage control method, in particular to an adaptive interference compensation passive control method for a micro-grid hybrid energy storage system. Background technique [0002] In order to alleviate the tense situation of energy supply and reduce greenhouse gas emissions, distributed power generation methods represented by photovoltaic and wind power generation have gradually received attention. However, there are problems such as intermittency and instability in the distributed power supply itself. In order to realize the flexible and efficient utilization of DG in the medium and low voltage range, the distributed power supply, load, energy storage device and control system are combined and controlled through the controllable interface. The microgrid system connected with the large power grid has emerged as the times require. [0003] The main goal of DC microgrid operation control is to maintain ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that there are uncertain factors and random factor interference in the microgrid system, which causes system parameter changes to affect the control effect, and provides an adaptive interference compensation passive control method for the microgrid hybrid energy storage system

Images