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Frequency control method based on wind power consumption

A technology of frequency control and wind power accommodation, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as the inability to eliminate the adverse effects of wind power grid integration, the inability to meet the needs of power grid frequency regulation, and potential safety hazards in power grid frequency. Improve system frequency characteristics, reduce power generation costs, and have good frequency control effects

Active Publication Date: 2018-11-23
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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Problems solved by technology

At present, with the continuous popularization of UHV AC and DC lines and the implementation of national energy-saving and environmental protection policies, the amount of wind power grid-connected has increased on a large scale, but at the same time, the grid-connected space of conventional units has been greatly occupied, reducing the system inertia and frequency. Responsiveness is reduced, which greatly affects the efficiency of wind power consumption and poses a great potential safety hazard to the frequency security of the power grid. However, the traditional power grid frequency control method has been unable to eliminate the adverse effects of wind power grid integration and cannot meet the increasingly severe grid frequency regulation situation. need

Method used

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  • Frequency control method based on wind power consumption
  • Frequency control method based on wind power consumption
  • Frequency control method based on wind power consumption

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Embodiment Construction

[0049] In order to better understand the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings.

[0050] Use a single-unit two-zone system for modeling and simulation, and the system model block diagram is as followsfigure 1 where sub-region i is the wind power disturbance region and region j is the non-disturbed region. In order to simplify the calculation, centralized parameters are used for simulation analysis; such as figure 1 shown, B i , B j is the frequency deviation coefficient; a i , b i Assign coefficients to ACE; R i , R j is the adjustment coefficient; ACE i , ACE j is the regional control deviation; T g,i , T g,j is the governor time constant; T t,i , T t,j is the time constant of the steam turbine; H i , H j is the inertia time constant of the system; D i , D j is the system load damping constant; ΔP g,i , ΔP g,j is the output power of the governor; ΔP t,i , ΔP ...

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Abstract

The invention discloses a frequency control method based on wind power consumption, comprising the steps as follows: A, calculating a wind power deviation of each sub-area in the control area; B, calculating a total wind power deviation of all sub-areas in the control area; C, distributing the total wind power deviation to each sub-area of the control area to adjust the regional control deviation,and calculating the adjusted regional control deviation after dynamic adjustment of each sub-area; and D, issuing a control command to the generator set in the sub-areas by the automatic power generation control system corresponding to the sub-areas according to the adjusted regional control deviation to realize the frequency modulation control. The invention is capable of sharing the frequency modulation responsibility equally among the sub-areas of the control area to further improve the current state of the frequency regulation of the power grid, so as to achieve the maximum complementaryfrequency modulation capability between the sub-areas, thereby ensuring safe and stable operation of the grid while improving the wind power consumption capacity of the grid.

Description

technical field [0001] The present invention relates to the technical field of electric power grid equipment, in particular to a frequency control method based on wind power consumption. Background technique [0002] my country has a vast territory and complex terrain. Therefore, according to different terrains, power generation methods are also different. Among them, wind power generation is mostly concentrated in the "Three North Areas", which has unfriendly characteristics such as strong fluctuation, intermittent, and anti-peak regulation, and the phenomenon of wind abandonment is very serious. Grid-connected wind power refers to medium-to-large wind turbines with hundreds to thousands of wind turbines installed in the wilderness and connected to the grid. At present, with the continuous popularization of UHV AC and DC lines and the implementation of national policies such as energy conservation and environmental protection, the amount of wind power connected to the grid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/386H02J3/24H02J2203/20Y02E10/76
Inventor 饶宇飞李晓萌张振安赵阳刘巍王骅李程昊田春笋崔惟潘雪晴刘娆刘柳
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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