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Method for determining voltage feasible region based on total wind power on-grid active power flow

A technology for determining voltage and wind power. It is used in AC network voltage adjustment, wind power generation, and single-grid parallel feeding arrangements. It can solve the problems of AVC control failure, affecting system stability, and inability to track feasible domain instructions, and improve economic efficiency. , to ensure the effectiveness of the control, to avoid the effect of the regional voltage steep rise or drop

Active Publication Date: 2013-10-23
STATE GRID CORP OF CHINA +2
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Problems solved by technology

At this time, no matter what control strategy is adopted by the second-level control, it is impossible to track the feasible region command (target voltage and voltage limit) given by the third-level control (OPF), because the central voltage given by the third-level control often completely deviates from the feasible region , resulting in AVC control failure, affecting the stability of the entire system

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  • Method for determining voltage feasible region based on total wind power on-grid active power flow
  • Method for determining voltage feasible region based on total wind power on-grid active power flow
  • Method for determining voltage feasible region based on total wind power on-grid active power flow

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Embodiment example

[0045] The regional wiring method of this embodiment is as follows Figure 5 As shown, the specific steps are as follows:

[0046] 1) Select the total grid-connected active power of wind power as the characteristic value representing the operation mode of the total active power generation in the wind power area, as the characteristic criterion of the operation mode:

[0047] In this embodiment, the active power P of the first-line Gucha Line between Guyuan-Chabei Station is selected ref As a characteristic quantity, this is because this line is a centralized network access line for wind turbines, and its value can identify the operation mode of the total active power output of wind power in the Guyuan area.

[0048] 2) For each operation mode corresponding to the different intervals where the feature quantity is located, follow the steps below for the voltage feasible range of each busbar in the wind power area under each operation mode.

[0049] 2.1) First, according to the...

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Abstract

The invention relates to a method for determining voltage feasible region based on total wind power on-grid active power flow, and belongs to the technical field of automatic voltage control of a power system. The method comprises the following steps: selecting a characteristic quantity for representing a total active power generation operation mode in a wind power region, namely active partition P<ref> which serves as the characteristic criterion of the operation mode, and identifying the operation mode of the total wind power active power output of a target region by using the characteristic quantity value; and determining the voltage feasible region of each bus in the wind power region in corresponding operation modes according to different intervals of the characteristic quantity. By the method, aiming at the problems that a tertiary voltage control mode has a poor effect on the voltage control of a wind power field, or even fails completely, the difficult problem is solved by generating the target voltage, the upper limit and the lower limit of a central bus dynamically and controlling the upper limit and the lower limit of the voltage of the bus according to the total on-grid active power of a wind power centralized access region; and a good control effect also can be achieved even in the situation of extreme voltage flurry. The method-based tertiary voltage control mode has better robustness and wider applicability, and can solve the problem of voltage control of large-scale wind power grid connection.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, and in particular relates to a method for determining a voltage feasible region based on wind power total grid-connected active power flow. Background technique [0002] Coal and other traditional energy reserves are limited, and energy issues have aroused great concern around the world. For a long time, coal has been closely related to people's life, and one of its important uses is to generate electricity. Due to the shortage of coal resources, countries around the world have invested a lot of manpower and material resources to explore new energy utilization models, and wind power has become one of the recognized green energy sources with great development potential. During the 12th Five-Year Plan period, my country formulated relevant policies and guidelines to increase support for wind power, gradually optimize the energy structure, and reduce the ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/12
CPCY02E10/763Y02E10/76
Inventor 汤磊常晓慧王鹏王双孙宏斌刘伟初祥祥谢旭郭庆来于磊谷文旗周鑫韩宇龙朱梅
Owner STATE GRID CORP OF CHINA
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