Electric power system dispatching method with wind power reserve and considering fan wake flow effect

A power system dispatching and wake effect technology, applied in wind power generation, photovoltaic power generation, reducing/preventing power oscillation, etc., can solve the problems of insufficient frequency support and flexible adjustment ability of the power system, and the reduction of the proportion of synchronous generators. Avoid redundancy or insufficiency, improve system stability, and increase the effect of proportion

Pending Publication Date: 2022-08-09
CHINA THREE GORGES UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] With the increase of new energy power generation, the proportion of synchronous generators decreases, resulting in insufficient frequency support and flexible adjustment capabilities of the power system

Method used

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  • Electric power system dispatching method with wind power reserve and considering fan wake flow effect
  • Electric power system dispatching method with wind power reserve and considering fan wake flow effect
  • Electric power system dispatching method with wind power reserve and considering fan wake flow effect

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Experimental program
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Effect test

Embodiment Construction

[0148] like figure 1 As shown in the figure, the power system scheduling method with wind power backup and considering the wake effect of wind turbines includes the following steps:

[0149] Step 1: Consider the influence of the wake effect on the output of the wind turbine, and establish the output model of the wind farm;

[0150] The output of wind farm fans:

[0151]

[0152] P w =∑ j μ w,j p w,j (1-κ w ), μ w,j,t ∈{0,1} (2)

[0153] where p w,j is the output of fan j, f(v w ) is the relational function of fan output and wind speed, v w Wind speed captured for the fan, p R Indicates the rated power of the fan, v in , v out , v R are the cut-in wind speed, cut-out wind speed and rated wind speed of the fan respectively; μ w,j represents the operating state of the wind turbine j in the wind farm w, κ w Indicates the load reduction ratio of the wind turbines in the wind farm; P w represents the output of the wind farm w;

[0154] Considering the wake effec...

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Abstract

The invention relates to an electric power system dispatching method with wind power reserve and considering a fan wake effect. The method comprises the following steps: constructing a wind power plant output model considering the wake effect; establishing a power system frequency dynamic model to obtain the frequency change rate and the maximum frequency deviation of the system; constructing a power system frequency security constraint; establishing a mathematical model for providing reserve for the wind power plant, and determining up-regulation reserve and down-regulation reserve of the wind power plant in the prediction scene; establishing a relation between the wind power reserve in the basic scene and the wind power reserve in the uncertain scene, and obtaining expressions of up-regulation reserve and down-regulation reserve in the uncertain scene; and constructing a collaborative scheduling model, and solving. According to the method, the power system frequency safety constraint is established, the wind power plant is constructed to provide the frequency regulation and standby cooperative scheduling model for the power system, the model is solved to obtain the optimal unit combination and unit output, the frequency safety of the power system is guaranteed, the stability of the power system is improved, and the operation cost of the power system is reduced.

Description

technical field [0001] The invention belongs to the field of power system scheduling control, and in particular relates to a power system scheduling method with wind power backup and considering the wake effect of wind turbines. Background technique [0002] Low-carbon development has promoted the rapid growth of power generation from renewable energy sources such as wind and solar energy. However, large-scale grid-connected new energy power generation has brought great challenges to the safe and stable operation of the power system. On the one hand, wind turbines and photovoltaic panels are connected to the grid through the power electronic interface, and they cannot provide inertia to the system, resulting in the reduction of the synchronous inertia of the system, which affects the safe operation of the system. On the other hand, the volatility and uncertainty of new energy generation requires the power system to provide more backup for real-time power balance to prevent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38H02J3/46
CPCH02J3/241H02J3/38H02J3/46H02J2300/28H02J2300/24H02J2203/20Y02E10/76
Inventor 朱文卓
Owner CHINA THREE GORGES UNIV
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