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An optimal tide calculation method and device for wind power plant connected VSC-HVDC

A VSC-HVDC, optimal power flow technology, applied in the field of optimal power flow calculation including VSC-HVDC connected to the grid by wind farms, can solve problems such as low calculation efficiency, inability to obtain digital characteristics of output variables, and complex calculation process.

Active Publication Date: 2019-01-11
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0008] The embodiment of the present invention provides an optimal power flow calculation method including wind farm grid-connected VSC-HVDC, which can effectively solve the problems that the existing technology cannot obtain accurate digital characteristics of output variables, the calculation process is complex and the calculation efficiency is low.

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Embodiment Construction

[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0088] see figure 1 , is a schematic flowchart of an optimal power flow calculation method including wind farm grid-connected VSC-HVDC provided in Embodiment 1 of the present invention, including:

[0089] S101. Establishing an active power output model of the wind farm and a mathematical model of VSC-HVDC taking into account converter losses;

[0090] S102. Using an autoregressive moving average model and a scenario reduction strategy based on Kantorovich distanc...

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Abstract

The invention discloses an optimal tide calculation method for wind power plant connected VSC-HVDC which includes the following steps: establishing the active power output model of wind farm and considering the mathematical model of VSC-HVDC. The auto-regressive moving average model and the scene reduction strategy based on Kantorovich distance are adopted to simulate the uncertainty of the wind power, and a finite number of wind power scene sets are obtained according to the power model of the wind farm. An interior point method is used to analyze the finite set of wind power scenarios and the mathematical model of VSC- HVDC is used to calculate the optimal power flow, and the numerical characteristics of the output variables are obtained. The invention discloses a wind farm grid-connected VSC-HVDC optimal power flow computation method can effectively solve the problems that the existing technology can not obtain accurate digital characteristics of output variables, the computation process is complex and the computational efficiency is low. The embodiment of the invention also discloses an optimal tide calculation device for wind power plant connected VSC-HVDC.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to an optimal power flow calculation method and device including a wind farm grid-connected VSC-HVDC. Background technique [0002] The new generation of high-voltage DC transmission technology (Voltage Source Converter based High Voltage Direct Current, VSC-HVDC) based on voltage source converter (VSC) and pulse width modulation (PWM) technology can realize active and reactive power fast decoupling control, for The smooth grid integration of large-scale wind power and other new energy sources has provided strong support, making the power system develop rapidly in a greener and more intelligent direction. Therefore, wind farms connected to the grid via VSC-HVDC are the development trend of wind power in the future. [0003] Due to the randomness and uncertainty of wind power, the large-scale grid connection of wind power will bring great challenges to the safe and stable operat...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/36H02J3/38
CPCH02J3/06H02J3/36H02J3/386H02J2203/20Y02E10/76Y02E60/60
Inventor 张东辉王长香陈雁李鹏飞李霞林黄迪
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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