Abstract
In this paper, a comprehensive economic allocation method based on virtual energy theory for microgrid complementary power supply is proposed, which is successfully applied to the multi energy complementary planning and comprehensive economic planning of an island microgrid. In order to evaluate and optimize the microgrid in the planning stage more objectively based on the characteristics of various combinations of renewable micro generation and flexible operation modes, a new method of the micro-grid comprehensive economic configuration and optimization of the distributed generation is proposed based on virtual energy theory. Firstly, the Micro-grid model structure based on the virtual energy theory is given. Secondly, the virtual energy conversion model of different distributed power generations is also studied. The micro-grid pluripotent complementary and comprehensive economic optimization model (PCCEP) based on virtual energy theory are reached too. Combined with a practical example, a PCCEP method of the micro-grid based on the Homer software platform is discussed. The case study indicates that the method can avoid the uncertainty of the decision-making factors and the subjectivity of expert evaluation. It is shown that the new method is a practical solution for microgrid comprehensive economic optimization planning.
Highlights
Micro grid [1], [2], [3] is a small power distribution system consisting of distributed power supply device, energy storing device, energy conversion device, load, protection and monitoring device, etc
A comprehensive economic allocation method based on virtual energy theory for microgrid complementary power supply is proposed
The new method has been successfully applied to the multi energy complementary planning and comprehensive economic planning of an island micro grid
Summary
Micro grid [1], [2], [3] is a small power distribution system consisting of distributed power supply device, energy storing device, energy conversion device, load, protection and monitoring device, etc. Micro grid has become an effective form of renewable energy utilization and has great application prospects [4], [5]. Because the characteristics of distributed power supply vary greatly, the multi-energy complementation, comprehensive economic allocation and evaluation of the micro-grid has become a technical problem to be solved urgently. A comprehensive economic allocation method based on virtual energy theory for microgrid complementary power supply is proposed. The new method has been successfully applied to the multi energy complementary planning and comprehensive economic planning of an island micro grid. We propose and study the transformation model of distributed generation based on virtual energy theory. The comprehensive economic planning of microgrid based on virtual energy theory is introduced in detail.
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