Abstract
During the operation of microgrid, the rational load power sharing among different interfacing converters is determined by their grid-connecting capacities. In order to guarantee every converter operating in ideal conditions, a modified power sharing method based on the droop control is proposed for the radial and mesh configurations of DC microgrid, which, based on low-bandwidth communication network, employs two compensating terms for the controlled converter, i.e. the average DC-bus voltage and output power of its two adjacent converters, to realize the enhance of DC-bus voltage and the rational load power sharing among the converters with different line resistances. The applicability of the proposed method for different network configurations and line resistances is analyzed in detail. A MATLAB/Simulink model of DC microgrid with four converters is built to verify the effectiveness of the proposed control approach.
| Original language | English |
|---|---|
| Pages (from-to) | 53-59 |
| Number of pages | 7 |
| Journal | Dianli Zidonghua Shebei/Electric Power Automation Equipment |
| Volume | 36 |
| Issue number | 3 |
| DOIs | |
| State | Published - 10 Mar 2016 |
| Externally published | Yes |
Keywords
- Communication delay
- DC microgrid
- Droop control
- Mesh structure
- Power sharing
- Radial structure
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