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Main network online safety scheduling method for large-scale wind power waist load access

A scheduling method, wind power technology, applied in wind power generation, single-network parallel feeding arrangement, electrical components, etc., can solve the problem of not finding the main network security quantification index

Active Publication Date: 2019-04-23
竺炜
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason is that no suitable quantitative indicator for mainnet security has been found

Method used

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  • Main network online safety scheduling method for large-scale wind power waist load access
  • Main network online safety scheduling method for large-scale wind power waist load access
  • Main network online safety scheduling method for large-scale wind power waist load access

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] 1. The generation method of the output planning curve of the wind power "waist load" in the day ahead

[0015] 1.1 Abandoned wind caused by "base load" access of wind power

[0016] According to the meteorological information related data of the wind farm, the wind force and wind speed of the wind farm are forecasted by using physical simulation calculation and scientific statistical methods, and the forecast curve of wind power for tomorrow is obtained. . The forecast accuracy of wind power is generally inversely proportional to the advance of forecast time, so the forecast accuracy of wind power ahead is poor.

[0017] Table 1 24-hour wind power output before the forecast date

[0018]

[0019] When formulating the operation mode of the main network, it needs to follow the wind power access plan. In order to avoid the deviation between the connection plan and the actual wind power, large wind farms often use the "base load" output to connect to the main grid, wh...

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Abstract

Large-scale wind power, which is similar to a load, is generally connected to a main network. The large-scale wind power is divided into three output levels, namely a base load, a waist load and a peak load. The wind abandoning amounts of the three output levels are decreased from large to small, while the randomness thereof are increased from small to large. The output of the basic load is favorable for the safe operation of the main network, while the wind abandoning amount of the base load is too large. In order to reduce the wind abandoning amount and improve the static power-angle safetyof the main network, the invention provides the main network online safety scheduling method for large-scale wind power waist load access. According to the method, a wind power prediction value sequence is subjected to polynomial regression fitting, and a day-ahead wind power waist load output plan curve is obtained. For the situation that the deviation between the output plan and the actual windpower is large, a secondary frequency modulation 'optimized starting' curve family is provided, and an optimized starting time point of secondary frequency modulation of the frequency modulation unitis obtained. Based on an equivalent power angle index, an online optimization method for secondary frequency modulation of the frequency modulation unit is provided. The IEEE 39 example verifies the feasibility of the scheduling method. The method has practical significance for reducing the abandoned air volume and improving the safe operation level of the main network.

Description

technical field [0001] Power system (grid) safe operation and control. Background technique [0002] There are many large-scale wind farms exceeding 100 MW in China, all of which are connected to the main grid. Wind power output has both statistical laws and large randomness, which is similar to the daily load curve. Therefore, referring to the load division, the wind power output can be divided into three output levels: "base load", "waist load" and "peak load". . [0003] At present, large-scale wind farms generally adopt the "base load" output mode, which is similar to the constant power output of traditional power plants, which is convenient for the safe operation mode of the main grid before (that is, tomorrow), but the amount of abandoned wind is too large during online operation. The "peak load" of wind power is too random and difficult to predict, which has a great impact on the safe operation of the power grid. In order to balance the amount of abandoned wind an...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38G06Q10/04G06Q10/06G06Q50/06
CPCH02J3/386H02J3/00G06Q10/04G06Q10/06312G06Q50/06H02J2203/20Y02E10/76Y04S10/50
Inventor 竺炜谭浩池喜洋
Owner 竺炜
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