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Direct current transmission based wind power and thermal power binding power generation and transmission system optimization planning method

A technology of power generation and transmission system and power transmission system, applied in wind power generation, AC network circuits, circuit devices, etc., can solve the problems of investment cost, operation cost, power generation cost impact, etc.

Inactive Publication Date: 2017-01-11
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long-distance and reverse distribution of resource areas and load centers in my country, the power of large-scale energy bases needs to be transmitted to heavy load centers through DC transmission systems over long distances, and DC transmission systems will affect the investment costs of the entire wind and thermal power bundling system. Therefore, it is necessary to carry out research on optimal planning of wind-thermal power bundling power generation and transmission system based on DC transmission

Method used

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  • Direct current transmission based wind power and thermal power binding power generation and transmission system optimization planning method
  • Direct current transmission based wind power and thermal power binding power generation and transmission system optimization planning method
  • Direct current transmission based wind power and thermal power binding power generation and transmission system optimization planning method

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Embodiment

[0080] An example is used to illustrate the optimal planning method of wind thermal power bundling power generation and transmission system based on DC transmission. The specific steps are as follows:

[0081] Step 1: Data initialization

[0082] Assuming that the rated capacity of the fan is 2MW, the cut-in wind speed, rated wind speed and cut-out wind speed are 3.33m / s, 15.28m / s and 8.33m / s respectively. The investment cost of the fan is taken as 8×10 6 $ / MW. Under the 95% probability, the fluctuation rate of wind power output is 1.5% / min.

[0083] Assume that the rated capacity of the thermal power unit is 600MW, and the unit investment cost is 4×10 6 ￥ / MW, the minimum output percentage is set at 30% of the unit’s rated capacity, the unit coal consumption is 330g / kWh, and the compensation rate per minute is taken as 1.1% / min. The relevant parameters of the converter station and the transmission line in the DC transmission system are listed in Table 1.

[0084] Table 1 ...

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Abstract

The invention belongs to the technical field of electric power system planning, and particularly relates to a direct current transmission based wind power and thermal power binding power generation and transmission system optimization planning method. The method takes the compensation capacity of a thermal generator set, the capacity of a DC power transmission system and the like as constraint conditions, takes the minimum unit power generation cost of the whole binding system as an objective function, and solves by adopting a simulated annealing algorithm. The method provided by the invention makes up defects of an existing binding system optimization planning model and algorithm, and factors considered by a built model are more comprehensive, thereby providing solid and effective theoretical guidance for hybrid planning energy base delivery.

Description

technical field [0001] The invention relates to the technical field of power system planning, in particular to a modeling and solving method for optimal planning of a wind-thermal power generation and transmission system based on direct current transmission. Background technique [0002] With the continuous growth of global energy demand and the increasingly severe environmental problems (acid rain, smog, etc.), countries all over the world are adjusting their energy policies and increasing the development of renewable energy. Wind energy, due to its wide distribution and mature technology, has become one of the most potential renewable energy sources. At present, my country has planned a number of large-scale wind power bases in Gansu, Inner Mongolia and other places to cope with the growing energy demand and alleviate the increasingly severe environmental problems. [0003] However, due to the inherent volatility and intermittency of wind power, wind power grid integratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20Y02E10/76
Inventor 董吉哲高辉郭玉福王朝辉刘欣高峰郝意闻吴龙飞
Owner STATE GRID CORP OF CHINA
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