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Alternating current/direct current hybrid microgrid optimized operation method considering micro-source surplus Internet access

An AC-DC hybrid and optimized operation technology, which is applied in the direction of AC-DC network circuit layout, AC network with energy trade/energy transmission authority, single-network parallel feeding arrangement, etc., can solve the problem of failing to meet the convergence accuracy requirements and convergence speed Slow and so on

Active Publication Date: 2018-05-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0003] At present, the commonly used intelligent algorithm has a good optimization effect, but there are still some problems such as slow convergence speed or failure to meet the convergence accuracy requirements, so it is necessary to try a new intelligent algorithm

Method used

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  • Alternating current/direct current hybrid microgrid optimized operation method considering micro-source surplus Internet access
  • Alternating current/direct current hybrid microgrid optimized operation method considering micro-source surplus Internet access
  • Alternating current/direct current hybrid microgrid optimized operation method considering micro-source surplus Internet access

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example

[0157] Examples of the present invention consider as figure 2 In the AC-DC hybrid microgrid shown, MS in the figure represents the micro-source, and Load represents the load. For the power flow controller between the AC area and the DC area, a bidirectional power flow controller is used to realize the power flow between the AC area and the DC area, thereby reducing the operating cost of the microgrid and improving the utilization of the micro-source. In the calculation example, the DC area includes fuel cells, photovoltaic power generation and batteries, and the AC area includes diesel generators and wind power generation. The AC area and the DC area are connected by converters. The parameters of each micro-source are shown in Table 2. The battery capacity is 250kW·h, the state of charge at the beginning and end moments is 0.3, and the SOC range is 0.3 to 0.9. In the present invention, the on-grid power of the micro-source surplus power is obtained by comparing the electrici...

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Abstract

The invention provides an alternating current / direct current hybrid microgrid optimized operation method considering micro-source surplus Internet access. The method comprises the steps that an alternating current / direct current hybrid microgrid optimized operation mathematical model including wind power generation, photovoltaic power generation, a battery, a diesel generator and a fuel cell is established; the alternating current / direct current hybrid microgrid mathematical model comprises a multi-objective, multi-constraint and non-linear objective function constructed with consideration ofpower grid purchase cost, micro-source fuel cost, environmental benefit cost, network loss, operation and maintenance cost, and micro-source surplus Internet access income, and the mathematical modelobeys the constraints of internal microgrid power balance, controllable micro-source climbing rate, upper and lower limits of battery charge and discharge per unit time, upper and lower limits of battery charge state, battery power balance before and after a time period, and unchanged battery charge state; a basic queue competition algorithm is improved to acquire an improved queue competition algorithm; and the improved queue competition algorithm is used to solve the alternating current / direct current hybrid microgrid optimized operation mathematical model. According to the invention, the microgrid operation cost can be effectively reduced, and the new energy consumption rate is promoted.

Description

technical field [0001] The invention relates to an optimal operation method of an AC-DC hybrid microgrid. In particular, it relates to an optimal operation method of an AC / DC hybrid micro-grid taking into account the micro-source surplus power connected to the grid. Background technique [0002] With the progress and development of society and people's increasing material needs, the power industry is facing the contradiction between the depletion of traditional energy sources and the increase in power demand, and it is imminent to seek new energy sources for power generation. Photovoltaic power generation (photovoltaics, PV), wind power generation (wind turbine, WT), fuel cell (fuel cell, FC) and diesel generator (diesel generator, DEG) due to the efficient use of renewable energy, good environmental benefits, installation The advantages of flexible location have attracted widespread attention, and this type of power supply is collectively referred to as distributed generat...

Claims

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Application Information

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IPC IPC(8): H02J4/00H02J3/38H02J3/00
CPCH02J3/008H02J3/381H02J4/00H02J2203/20Y02E10/76
Inventor 李鹏郑苗苗李国杰张新宗张斌
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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