Abstract
Taking the consumption rate of renewable energy and the operation cost of hybrid AC/DC microgrid as the optimization objectives, the adjustment of load demand curves is carried out considering the demand side response (DSR) on the load side. The complementary utilization of renewable energy between AC area and DC area is achieved to meet the load demand on the source side. In the network side, the hybrid AC/DC microgrids purchase electricity from the power grid at the time-of-use (TOU) price and sell the surplus power of renewable energy to the power grid for profits. The improved memetic algorithm (IMA) is introduced and applied to solve the established mathematical model. The promotion effect of the proposed source-network-load coordination strategies on the optimal operation of hybrid AC/DC microgrid is verified.
Highlights
With the increase of energy crisis and environmental pollution, renewable energy has become the focus of current research because of its inexhaustible characteristics and environmental friendliness [1,2,3]
This paper studies a hybrid AC/DC microgrid which contains wind turbine (WT) and diesel generator (DEG) in AC area, and photovoltaics (PV) and energy storage (ES) in DC area
When the internal load demand is met in the hybrid AC/ DC microgrid, the surplus power of renewable energy can be sold to the power grid if the unit generation cost of renewable energy is less than the selling price
Summary
With the increase of energy crisis and environmental pollution, renewable energy has become the focus of current research because of its inexhaustible characteristics and environmental friendliness [1,2,3]. Current research mainly takes the efficient utilization of renewable energy or economic operation of hybrid AC/DC microgrid as the optimal objectives. According to the time-of-use (TOU) price of the power grid, the price-based DSR is considered in the order of the peak price time to the valley price time to optimize the operation costs of hybrid AC/DC microgrid. It can improve the consumption rate of renewable energy and reduce the operation costs of hybrid AC/DC microgrid to a large extent. Comparing with the calculation results of hybrid AC/DC microgrids without considering sourcenetwork-load coordination, the cost of hybrid AC/DC microgrids decreases from $1533.7 to $1442.4, which further proves the feasibility of the IMA
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