A method to increase the maximum grid-connected capacity of wind power based on p2g technology

A power grid and wind power technology, applied in the field of increasing the maximum grid-connected capacity of wind power in the power system, can solve problems such as wind power grid-connected capacity not considered

Inactive Publication Date: 2019-06-14
DALIAN UNIV OF TECH +2
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Problems solved by technology

Existing methods only analyze the grid-connected capacity of wind power from the perspective of the power grid, and do not consider increasing the grid-connected capacity of wind power by combining the grid with the natural gas grid

Method used

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  • A method to increase the maximum grid-connected capacity of wind power based on p2g technology
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  • A method to increase the maximum grid-connected capacity of wind power based on p2g technology

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Embodiment Construction

[0107] Taking the IEEE 14-node transmission network and the 3-node simplified natural gas network as examples, the specific implementation of the present invention will be described in detail in combination with technical solutions and accompanying drawings.

[0108] Such as figure 1 As shown, node 7 of the IEEE14 node system is connected to the wind farm, node 4 and node 14 of the power grid are respectively connected to node 1 and node 2 of the gas grid through the P2G device, and the conversion efficiency of the P2G device is 60%. The high calorific value of natural gas is 39.82MJ / m 3 . The No. 1 node of the natural gas network is connected to the gas source, and there are pressurization stations installed between No. 2 and No. 3 nodes. The gas loads of each node are 86.7MW, 0.866MW and 86.7MW respectively. In the wind farm, the rated installed capacity of each unit is 2MW, the cut-in wind speed of the fan is 4m / s, the rated wind speed is 12.5m / s, and the cut-out wind spe...

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Abstract

The invention provides a method for increasing the maximum grid-connected capacity of wind electricity based on a P2G technology. For expected wind electricity power not receptive for a power grid, electric energy is converted into chemical energy through a P2G device, the power grid is connected into a natural gas network in a mode of natural gas to replace partial or all gas wells to supply natural gas loads, with the help of the adjusting capacity of a gas source and the natural gas network, the natural gas network and the power grid operate synergistically, and the acceptance level of wind power by the power grid is increased. With the grid-connected capacity of wind electricity of a series-parallel system being the optimized target, in consideration of operation restrains of the power grid and the gas network coupled through P2G device, a probability optimizing fashionable model of the series-parallel system is established; test wind speed is introduced, and the probability optimizing model is converted into a deterministic model for solving. The method has the advantages that the problem of limit on the grid-connected capacity of wind electricity can be solved, the P2G device is utilized for coupling the power grid with the natural gas network, and therefore the reception level of the power grid for wind electricity is increased.

Description

technical field [0001] The invention belongs to the field of power system planning, and relates to a method for increasing the maximum grid-connected capacity of renewable energy in a power system, in particular to a method for increasing the maximum grid-connected capacity of wind power in a power system through coordinated operation of a power system and a natural gas network. Background technique [0002] With the continuous depletion of fossil energy and the intensification of environmental problems, the utilization rate of renewable energy represented by wind power continues to increase. Driven by various countries, the commercialization of wind power continues to increase, the technology is gradually mature, and has been rapidly developed. develop. At present, the total installed capacity of wind power in my country ranks first in the world, and the continuous increase in the scale of wind power grid-connected has alleviated the problem of energy shortage in my country...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 周玮孙辉彭飞翔胡姝博丁长强何海隋鑫高凯刘劲松赵清松王刚戈阳阳李胜辉张冠锋
Owner DALIAN UNIV OF TECH
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