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A Generating Set Combination Method Based on DC Power Following Wind Power Fluctuation

A technology of wind power fluctuations, generator sets, applied in the field of combination

Active Publication Date: 2019-06-04
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on unit combination problem and reserve capacity allocation in interconnected power system is still in the exploratory stage

Method used

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  • A Generating Set Combination Method Based on DC Power Following Wind Power Fluctuation
  • A Generating Set Combination Method Based on DC Power Following Wind Power Fluctuation
  • A Generating Set Combination Method Based on DC Power Following Wind Power Fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0130] In order to verify the rationality and effectiveness of the generator set combination method provided by the present invention, this example uses the ±800kV UHV DC and related systems from Jiuquan to Hunan as examples, and uses the commercial optimization software CPLEX to perform optimization calculations.

[0131] 1. Calculation of equivalent load duration curve

[0132] According to the actual operation experience of wind power in Gansu, although the output variation rate of a single wind farm is relatively large, under the effect of "wind-wind complementarity", the output variation rate of the wind power base is small, and the probability that the predicted value and the actual deviation are within 10% is 91%. The article considers the wind power that needs DC transmission in Gansu as a whole, and uses the actual deviation value of wind power to be ±10%, and the probability is 9% (the probability load is the largest) to calculate the equivalent load continuity curve...

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Abstract

The invention provides a generator set combination method based on a condition that direct current power fluctuates with wind power. A generator set comprises a thermal power generating unit, a wind turbine generator and a hydroelectric generating set. The method comprises the following steps of determining a set combination target function; determining a set combination constraint condition; and solving the set combination target function. Under the condition that direct current power fluctuates with wind power, an optimal set combination mode is provided for a direct-current interconnected alternating-current power grid. In the method, through establishing an equivalent load duration curve of a system, a set fault probability, a capacity and other factors are fully considered and then an accurate and reasonable rotation standby capacity of the system is calculated. Simultaneously, from an angle of lowest electric power system operation cost, economical efficiency of the optimal mode is guaranteed so that the set combination mode comprehensively considers reliability and economy of the system. The method is simple, practical and comprehensive and possesses high operability.

Description

technical field [0001] The invention relates to a combination method, in particular to a generator set combination method based on direct current power following wind power fluctuations. Background technique [0002] Large-scale wind power access, due to the randomness and intermittent nature of its output, will lead to fluctuations in the active power of the grid. In order to ensure the reliable operation of the system after wind power is connected to the grid, it is necessary to arrange a certain capacity of spinning reserve on the basis of the original operation mode to respond to the random fluctuation of wind power output and maintain the frequency stability of the power system. Great peak shaving pressure. Using DC to follow wind power fluctuations to automatically adjust power, combined with DC transmission and receiving end grid power structure and adjustment capabilities, making full use of the respective adjustment advantages and complementary adjustment character...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/36H02J3/46H02J3/00
CPCH02J3/00H02J3/36H02J3/386H02J3/46H02J2003/365H02J2203/20Y02E10/76Y02E60/60
Inventor 韩奕王一哲周勤勇郭强杨德洲范雪峰夏懿宋汶勤张中丹杨昌海陈兆雁
Owner CHINA ELECTRIC POWER RES INST