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Capacity and stationing optimization method for distribution power supply of isolated microgrid

A technology of distributed power supply and optimization method, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the shortage of rotating backup, the possibility of increasing the stability of system frequency and voltage, and the hidden dangers of safe and stable operation of microgrid and other problems, to achieve the effect of low overall cost

Active Publication Date: 2013-02-13
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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Problems solved by technology

However, the existing planning methods seldom consider the impact of different distributed power capacity ratios and different installation locations on the safe and stable operation of the microgrid.
For microgrids, especially isolated microgrids, due to the small scale of the system, insufficient spinning reserve, and poor anti-disturbance ability, the possibility of a single disturbance causing system frequency and voltage stability problems increases.
If the influence of different schemes on the system voltage and frequency stability is not fully considered in the distributed power capacity and layout planning, it may bring great hidden dangers to the long-term safe and stable operation of the microgrid.

Method used

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  • Capacity and stationing optimization method for distribution power supply of isolated microgrid
  • Capacity and stationing optimization method for distribution power supply of isolated microgrid
  • Capacity and stationing optimization method for distribution power supply of isolated microgrid

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Embodiment Construction

[0033] figure 1 is the network diagram of an isolated microgrid. The solid line in the figure is the existing line, and the dotted line is the line to be selected. Nodes 1 to 3 are original power supply nodes, and the rest are load nodes, among which nodes 15 to 21 are newly added load nodes. The nodes that are allowed to access distributed power are nodes 7 to 26, and the allowable access capacity range determined according to engineering and resource conditions is 0 to G max . The optimization method proposed by the invention can be used to solve the problem of access capacity and layout of distributed power sources of this type of microgrid.

[0034] In this embodiment, the genetic algorithm is selected as the optimization algorithm, and new individuals of different generations are generated by selecting operators, crossover operators and mutation operators, and the fitness function of each individual is calculated according to the objective function calculation method p...

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Abstract

The invention belongs to the technical field of intelligent microgrids of power systems, and relates to a capacity and stationing optimization method for a distribution power supply of an isolated microgrid. Running voltage and frequency stability are considered during planning of the distribution power supply of the isolated microgrid, and a multi-target power supply planning model comprising security punishment factor and a running constraint condition are constructed; by adopting an optimization algorithm calculation model, a distributed power supply capacity and stationing planning scheme in which the microgrid runs securely and economically can be obtained. Potential running risks can be considered during planning; irrational parts during planning are corrected based on estimation of running stability; security, economic and low loss requirements are combined into a multi-target optimization model; and therefore, the isolated microgrid can run securely, stably and efficiently for a long time.

Description

technical field [0001] The invention belongs to the technical field of power system micro-grids, and relates to a method for optimizing the capacity and layout of isolated micro-grid distributed power sources. Background technique [0002] Isolated microgrids are a suitable way to supply power to islands and remote areas. The types of power sources in the microgrid are usually optimized and configured according to local resources, mainly distributed wind power, photovoltaics, diesel generators, gas turbines, and small hydropower. Due to the randomness and volatility of intermittent energy sources such as wind and light, in order to ensure the safe and stable operation of microgrids, various energy storage devices are also indispensable factors in isolated microgrids. [0003] The optimization of distributed power capacity and layout is the primary task of microgrid planning. Some scholars at home and abroad have studied the location and capacity of distributed power genera...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/12
Inventor 陈柔伊雷金勇王科董旭柱段卫国习伟金小明陈建斌柳勇军
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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