Optimal economical operation method of isolated microgrid considering energy storage life loss

Abstract

The invention discloses an isolated micro-grid optimum economic operation method taking energy storage life loss into consideration. Through research on influences of the charge and discharge process of a lead acid battery on life and conversion into economic cost to be added to a target function, a micro-grid optimal economic operation model taking the energy storage life loss into consideration is established, the model is solved by use of a strategy of combining an adjusting strategy and a particle swarm algorithm, an isolated micro-grid optimum economic operation scheme is determined, and output of a micro gas turbine and charge and discharge power of the lead acid battery at each stage in a scheduling period of an isolated micro-rid system are controlled according to the optimum economic operation scheme, such that the micro-rid system can be prevented from excessive power generation, and the operation cost of the micro-rid system can be decreased under the condition that power supply load demands are satisfied; and at the same time, the operation process of the isolated micro-grid optimum economic operation method is quite simple, the versatility is quite good, and the isolated micro-grid optimum economic operation method can be widely applied to planning the micro-grid economic operation scheme on different application occasions.

Description

technical field [0001] The invention relates to an economical operation technology of a power system, in particular to an optimal economical operation method of an isolated microgrid considering the life loss of energy storage, and belongs to the field of economical dispatching of the power system. Background technique [0002] With the increasingly severe energy crisis and environmental pollution, solar energy and wind energy are playing an increasingly important role in the utilization of renewable energy due to their abundant resources and no pollution. However, solar energy and wind energy have the characteristics of randomness and intermittence. After connecting to the grid, their operation and scheduling are more difficult. The emergence of microgrid provides an effective means for the comprehensive utilization of renewable energy. Microgrid is a new type of network structure, which is a system unit composed of a variety of distributed micro-power sources (usually inc...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides an optimal economical operation method for an isolated microgrid that takes energy storage life loss into account, which comprehensively considers factors such as energy storage life loss and load prediction error, and establishes an optimal microgrid. After the economic operation model, the particle swarm algorithm is used to solve the problem, and the optimal economic operation plan of the isolated microgrid is determined, so as to reduce the excessive power generation and waste of power resources in the microgrid system, and help reduce the microgrid while meeting the power supply load demand. System operating cost

Images