Large power grid adaptive robust backup optimization method considering risk costs

A technology of adaptive robustness and optimization method, which is applied to wind power generation, AC networks with the same frequency from different sources, circuit devices, etc. It can solve problems such as excessive subjectivity and inability to consider complementary backup of multiple types of generator sets.

Active Publication Date: 2018-09-28
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the subjectivity of the existing method for determining the backup of a new energy system and the inability to consider the complementary backup of multiple types of generating sets. The expected wind curtailment and expected load shedding models that take into account the error probability of new energy power generation output, and comprehensively consider the operating characteristics of various types of generating units such as new energy, thermal power, and hydropower, and

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  • Large power grid adaptive robust backup optimization method considering risk costs
  • Large power grid adaptive robust backup optimization method considering risk costs
  • Large power grid adaptive robust backup optimization method considering risk costs

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Embodiment

[0151] The following is a specific description of the large power grid adaptive robust backup optimization method that considers the risk cost disclosed in this embodiment:

[0152] 1. Assumed test conditions

[0153] Taking the power grid in a certain area of ​​my country as an example, the regional power grid includes 5 wind farms, 9 thermal power units, 4 gas-fired power plants, 3 hydropower plants, 2 nuclear power units, and 3 pumped storage units. The unit and unit operating parameters are shown in Table 1 below.

[0154] Table 1. Unit parameters

[0155]

[0156]

[0157] Among them, the maximum technical output of wind turbines is its installed capacity. Thermal power units, gas plants, and hydropower plants all include three types of units / power plants. The minimum on-off time of thermal power units is 12 hours, and the minimum on-off time of gas-fired power units is 6 hours. , the full power output of the nuclear power unit is 650MW, the low power output is 390...

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Abstract

The invention discloses a large power grid adaptive robust backup optimization method considering risk costs, which can comprehensively consider the risk costs caused by the cooperative scheduling ofmultiple-type generator sets and the uncertainty of new energy output. The method includes the following steps: firstly, depicting the uncertainty of output by using a new energy polyhedron uncertainty set, establishing a risk model of expected abandoning new energy and expected load shedding taking into account the error probability of new energy output, comprehensively considering the operationcharacteristics of multi-type power-supply sets, taking the power generation benefits and potential expected risks as backup targets, constructing a rotating backup optimization model for the cooperative scheduling of the multi-type power-supply sets considering the risk costs, and proposing a two-layer optimization algorithm combining an adaptive genetic algorithm and a branch cutting algorithm to solve the constructed model. According to the backup method disclosed by the invention, the optimal uncertainty of the new energy can be adaptively searched, the economic benefits and the risk costsof a backup strategy can be reasonably weighed, and the optimal comprehensive benefits can be realized.

Description

technical field [0001] The invention relates to the technical field of large power grid backup optimization, in particular to an adaptive robust backup optimization method for large power grids considering risk costs. Background technique [0002] With the shortage of fossil energy resources, the greenhouse effect, environmental pollution and other problems becoming more and more serious, new energy power generation technology has developed rapidly due to its strong renewable capacity, clean power generation and non-polluting characteristics. At present, my country's new energy installed capacity exceeds 160 million Kilowatt, has been ranked in the forefront of the world. However, due to the uncertainty and randomness of new energy, its large-scale access will have a greater impact on the traditional large power grid backup strategy. [0003] The traditional large power grid backup strategy mainly uses a certain fixed ratio of the maximum unit capacity or the maximum load of...

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Application Information

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IPC IPC(8): H02J3/46H02J3/06
CPCH02J3/06H02J3/46H02J2203/20Y02E10/76
Inventor 梁子鹏陈皓勇
Owner SOUTH CHINA UNIV OF TECH
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