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Wind-power-generation containing two-region interconnected power grid automatic generation control optimization method

A technology for automatic power generation control and regional interconnection, which is applied in wind power generation, electrical components, circuit devices, etc., and can solve problems such as difficulty in meeting the frequency control requirements of interconnected power grids

Inactive Publication Date: 2018-05-01
YUNNAN POWER GRID
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After large-scale wind power is integrated into the grid, it is difficult to meet the frequency control requirements of the interconnected grid

Method used

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  • Wind-power-generation containing two-region interconnected power grid automatic generation control optimization method
  • Wind-power-generation containing two-region interconnected power grid automatic generation control optimization method
  • Wind-power-generation containing two-region interconnected power grid automatic generation control optimization method

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Embodiment Construction

[0055] An automatic generation control optimization method for two-area interconnected grid with wind power generation, such as figure 1 As shown, the implementation steps are as follows:

[0056] Step 1, establish a space state model for automatic power generation control, such as figure 2 As shown, the model is a two-area interconnected system including hydropower, small thermal power units and wind power. In the figure, G1 represents small thermal power units, G2 represents hydropower units, B1 represents the busbar of the region, B2 represents the busbar of region 2, and W represents the wind turbines , area 1 is a wind power area, and area 2 is a hydropower area;

[0057] Based on the established spatial state model of the automatic power generation control of the two-area interconnection system, a schematic diagram of the transfer function of the automatic power generation of the model is given, as shown in image 3 shown.

[0058] According to the established space ...

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Abstract

The invention relates to a wind-power-generation-containing two-region interconnected power grid automatic generation control optimization method. The method comprises the steps of: establishing an automatic generation control space state model, wherein the model is a two-region interconnected system including hydroelectric power, a small fossil power plant and wind power; according to the established space state model, constructing a new cost function; forming a control variable by an output variable and an output feedback gain matrix so as to determine an input variable; in a closed-loop system, constructing a Lyapunov function to obtain a Lyapunov equation; and based on the Lyapunov equation, deriving a Hamilton function, and obtaining optimal values of corresponding parameters so as toobtain an automatic generation control optimization result of the established model. A control strategy disclosed by the invention has good dynamic adaptability and can reinforce coordination among aplurality of control regions. The invention solves the problem of frequency fluctuation of a power system, which is caused by ever-increasing installed capacity of wind power and inherent randomnessand fluctuation of the installed capacity of wind power.

Description

technical field [0001] The invention relates to the technical field of electric power system automatic control, in particular to an optimal dynamic feedback control method proposed based on optimal control theory. Background technique [0002] Modern power grids have evolved into complex interconnected power systems composed of multiple domains. When an active power disturbance suddenly occurs in a certain area, frequency fluctuations will occur in this area and spread rapidly to the entire power grid through tie lines. Especially with the rapid development and practical application of wind power generation, its inherent randomness and fluctuation will bring severe challenges to the stability of power system frequency. [0003] As the main means of power system frequency control, automatic generation control (AGC) not only needs to keep the system frequency and the power of the connected lines as close as possible to the predetermined value, but also needs to meet the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/24
CPCH02J3/24H02J3/386H02J3/46H02J2203/20Y02E10/76
Inventor 赵川路学刚朱涛丁士明王彬筌陈飞
Owner YUNNAN POWER GRID
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