Hybrid AC/DC microgrid optimization operation method and device considering source-grid-load interaction
An AC-DC hybrid, source-grid-load interaction technology, applied in the field of microgrid, can solve the problems such as the inability to effectively improve the power supply and consumption efficiency of the microgrid, the inability to exert the schedulability of demand-side resources, and the lack of consideration of power loss. Reduce power conversion losses, minimize operating costs, and improve environmental benefits
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Embodiment 1
[0058] An optimal operation method of an AC / DC hybrid microgrid considering the interaction of source, grid and load, the optimal operation method includes the following steps:
[0059] 101: Divide the AC-DC hybrid microgrid into an AC power supply area and a DC power supply area;
[0060] 102: Obtain the parameters of the demand-side load equipment, classify the load, and obtain the 24-hour load demand forecast value of the microgrid;
[0061] 103: Obtain the parameters of the converter in the AC-DC hybrid microgrid, and determine the calculation method of the power conversion loss in the converter;
[0062] 104: Use probabilistic methods to estimate the distribution curves of the maximum output and load power of photovoltaic cells and wind turbines;
[0063] 105: Use the upper layer game of the Stackelberg game model to optimize the load power supply mode and minimize the power conversion loss of the microgrid; use the lower layer game of the Stackelberg game model to optim...
Embodiment 2
[0079] Combined with the specific calculation formula, figure 1 , figure 2 The scheme in embodiment 1 is introduced in detail, see the following description for details:
[0080] The AC / DC hybrid microgrid provided by the present invention at least includes: wind power generators, micro gas turbines, photovoltaic cells, fuel cells and storage batteries, etc. The specific optimization steps are as follows:
[0081] 201: Obtain equipment parameters of wind turbines, micro gas turbines, photovoltaic cells, fuel cells and storage batteries, and 24-hour maximum power output prediction values of wind turbines and photovoltaic cells;
[0082] 202: According to the AC or DC power supply and storage methods of wind turbines, micro gas turbines, photovoltaic cells, fuel cells, and storage batteries, access to AC and DC buses, and divide AC and DC hybrid microgrids into AC power supply areas (hereinafter AC area for short) and DC power supply area (hereinafter referred to as DC area...
Embodiment 3
[0138] The following combined with specific examples, image 3 , Figure 4 , Figure 5 And experimental data carry out feasibility analysis to the scheme in embodiment 1, 2, see the following description for details:
[0139] In this embodiment, the AC and DC area power supply restrictions are shown in Table 2. The ILC is rated at 200kW. The battery capacity is 150kWh, and the upper and lower limits of remaining power are 120kWh and 30kWh. The time-of-use electricity price is shown in Table 3. Wind generators, photovoltaic cells and load forecast power such as image 3 shown. The initial load connection of the AC and DC areas of the AC-DC hybrid microgrid is as follows: Figure 4 shown.
[0140] Table 2 AC and DC area power supply restrictions
[0141]
[0142] Table 3 Time-of-use electricity price
[0143]
[0144] Take the confidence level α 0 = β 0 = β AC = β DC = 0.95, according to the method proposed in the present invention, the results after the opti...
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