Power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration

A voltage stability and uncertainty technology, applied in the field of power system, can solve the problems that it is difficult to obtain accurate prediction values, models and methods are not completely effective, etc.

Active Publication Date: 2015-12-16
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

With further development, the reactive power price model takes into account factors such as the environment, harmonics, and grid frequency, and even studies the reactive power price based on comprehensive cost allocation on the basis of power flow composition analysis; according to the generator's operating curve Scholars They pr...

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  • Power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration
  • Power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration
  • Power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0044] The reactive power optimization method of the power grid considering wind power uncertainty and voltage stability factors of the present invention includes:

[0045] Step (1): Use the Latin superlegislative sampling method to generate several possible scenarios of wind farms, and use the possible scenarios of wind farms to simulate the uncertainty of wind energy output;

[0046] Step (2): The objective function is to minimize the expected value of the reactive auxiliary service cost and the grid active network loss, and the reactive power output of the power plant is used as the optimization variable. According to the number of scenarios that may occur in the preset wind farm, a wind power plant with constraints Field reactive power optimization model;

[0047] Step (3): The continuous power flow method is used to solve the reactive power optimization m...

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Abstract

The invention discloses a power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration. The method comprises the following steps: 1) generating possible scenes of a plurality of wind power plants by utilizing a Latin hypercube sampling method, and simulating uncertainty of wind energy output by utilizing the scenes of the wind power plants; 2) with minimum expectation value of reactive power service cost and power grid active power loss being an objective function, and with power plant reactive power output being an optimization variable, establishing a wind power plant reactive power optimization model having constraint conditions according to the number of the preset possible scenes of the wind power plants; and 3) solving the wind power plant reactive power optimization model in the step 2) by utilizing a continuation power flow method, and verifying voltage stability of the reactive power optimization results.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a reactive power optimization method for a power grid considering wind power uncertainty and voltage stability factors. Background technique [0002] Renewable energy such as wind energy and solar energy has developed rapidly in China due to its cleanliness, economy, and sustainability. When more and more new energy sources are connected to the grid, the randomness of output power affects the safety and reliability of the system. , power quality, etc. Therefore, the planning and operation scheme of the power grid needs to be actively and moderately adjusted to build a safe, stable and economical power grid environment. As a part of power grid planning and operation, reactive power optimization planning can play a positive role in improving the security of the power grid, reducing power loss, promoting the rational distribution of reactive power flow in the power grid, and...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/00H02J3/38
CPCY02E10/76Y02E40/30
Inventor 田鑫张杰赵龙朱秀波赵光逢牛新生曹相阳刘晓明杨斌杨思高效海张丽娜王男
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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