Independent microgrid system design method based on universal gravitation algorithm

A technology of universal gravitation and system design, applied in the direction of AC network circuit, AC network load balancing, single network parallel feeding arrangement, etc., can solve the problem of no safety evaluation index and other problems

Active Publication Date: 2017-03-29
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The existing independent microgrid system design method only considers the index of the load point, and there is no reasonable consideration of the safety evaluation index, formulating a corresponding strategy, and seeking the optimal balance design method of economy and safety.

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  • Independent microgrid system design method based on universal gravitation algorithm
  • Independent microgrid system design method based on universal gravitation algorithm
  • Independent microgrid system design method based on universal gravitation algorithm

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Embodiment Construction

[0079] Such as figure 2 As shown in FIG. 2 , it is a schematic flowchart of a method for designing an independent microgrid system based on the gravitational algorithm provided by the present invention.

[0080] The invention revolves around the independent micro-grid system of wind, diesel and storage, and takes the number of wind power generators in the system, the number of parallel strings of photovoltaic cells and the number of parallel strings of batteries as optimization variables, and establishes a system that comprehensively considers its economy, environmental protection, utilization rate of renewable energy, and power supply. The multi-objective design model of technical and economic indicators such as safety and reliability transforms the multi-objective problem into a single-objective optimization problem, and uses the binary comparison and fixed weight method to determine the weight of each sub-objective, and then uses the gravitational algorithm to solve it.

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Abstract

The invention provides an independent microgrid system design method based on a universal gravitation algorithm. The independent microgrid system design method comprises the following steps of S1, establishing an independent microgrid system model with a multi-objective evaluation index; S2, converting the independent microgrid system model with the multi-objective evaluation index into an independent microgrid system model with a single-objective evaluation index; S3, taking accessible draught fan number Num<wt>, parallel-connection string number Num<pv> of photovoltaic cell arrays, and parallel-connection string number Num<bat> of storage batteries as optimization variables; S4, determining an operational control strategy of the independent microgrid system, preferably considering renewable energy generating capacity to satisfy load requirement, and determining charging-discharging states of the storage batteries and the starting and stopping of a diesel generator according to a difference value between the renewable energy generating capacity and the required electric quantity of the load; and S5, solving the independent microgrid system model by the universal gravitation algorithm. The independent microgrid system designed by the design method has the advantages of high economical efficiency, high environment-friendliness, high renewable energy utilization, high power supply safety and reliability, and the like.

Description

technical field [0001] The invention belongs to the technical field of distributed power generation independent micro-grid systems, and in particular relates to a design method for an independent micro-grid system based on a universal gravitational algorithm. Background technique [0002] The independent micro-grid system refers to a small power system that is completely isolated from the large power grid and operates independently. (photovoltaic, PV), wave power generation (wave power), etc. [0003] The power supply in a typical island independent micro-grid system is generally composed of photovoltaics, wind turbines, energy storage devices, diesel generators, control systems and power loads, providing stable and reliable power. Due to the strong complementarity between solar energy and wind energy, the island independent micro-grid system adopts the joint power generation method of wind turbines and solar energy, which can reduce the intermittence and volatility of a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/32
CPCH02J3/32H02J3/46H02J2203/20Y02E10/56Y02E70/30Y02P80/14
Inventor 喻志成徐瑞林朱小军陈涛刘玲李小菊董光德朱晟毅杨爽文一宇赵科张友强胡晓锐
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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