Abstract
The continuous development of microgrid’s technology creates favorable conditions for the access of distributed energy. Firstly, in order to consider the interests of the demand side and the power side, this paper presents a dual-layer optimal dispatching model of microgrid based on demand response. The objective of the first-layer optimization is to obtain the maximum load satisfaction and to optimize the load curve. The objective of the second-layer optimization is to make the microgrid system economical and environmentally friendly and to optimize the power utilization ratio. And a microsource control strategy based on the isolated microgrid is proposed, which can optimize the operation state of battery and improve the economy of the system. Finally, the Nondominated Sorting Genetic Algorithm-II (NSGA-II) is adopted to solve the optimal scheduling problem of the isolated microgrid. The simulation results indicate that the microsource scheduling strategy proposed in this paper can improve the operation economy and environmental conservation of the system. It can improve the reliability of microgrid power supply and reduce energy waste.
Highlights
The rational allocation of microsource output plays an important role in ensuring the safe and stable operation of microgrids and improving economic efficiency
Many studies focus on minimizing the operation cost by scheduling different power generation units, which regard the objective function as the prerequisite for the economic operation of microgrid
In order to improve the economy of microgrid operation from the perspective of load management, this paper introduces the concept of load satisfaction into the energy management of isolated microgrid to satisfy the load demand as much as possible
Summary
The rational allocation of microsource output plays an important role in ensuring the safe and stable operation of microgrids and improving economic efficiency. The microgrid modelling, optimization algorithms, and scheduling strategies should be deeply researched to achieve the optimal economic dispatching for energy management and improve the operation efficiency of the microgrid. Duong Tran et al proposed an economic dispatch method of the microgrid based on time-of-use pricing with coordinating the electricity price and battery charge-discharge management, which adopted the batteries for energy storage to achieve peak shaving during peak period [11]. The simulation results show that under the premise of considering the load satisfaction on the demand side and the influence of battery, using the dual-layer optimal dispatching strategy of microgrid proposed in this paper, the economic, environmental protection and electric energy utilization ratio of the microgrid system can reach an optimal state.
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