Stepwise-regression-based power system dominant electromechanical mode sensitivity analysis method
A power system, step-by-step regression technology, applied in electrical digital data processing, instruments, calculations, etc., to achieve the effect of speeding up calculation efficiency and reducing interference
Active Publication Date: 2014-01-01
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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[0006] The purpose of the present invention is to propose a sensitivity analysis method based on stepwise regression for the dominant electromechanical mode of the power system, through stepwise regression analysis of a large number of operating data of the power system under different operating modes, and calculate the active power of the generator to the dominant electromechanical mode of the power system Sensitivity to solve the difficulties encountered by traditional methods, so that it can be used for dynamic stability analysis of power systems
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[0025] specific implementation plan
[0026] The stepwise regression-based power system dominant electromechanical mode sensitivity analysis method proposed by the present invention comprises the following steps:
[0027] (1) Use the offline model of the power system to calculate and obtain the active power P of N generators under m different operating modes of the power system 1 ,...,P N and the continuous pole λ of the dominant electromechanical mode of the power system;
[0028] (2) According to the above active power P 1 ,...,P N and the continuous pole λ, through the following formula, the multiple linear regression equation between the active power of N generators in the power system and the dominant electromechanical mode of the power system under this operating mode is established:
[0029] λ = ∂ λ ∂ P 1 ...
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The invention relates to a stepwise-regression-based power system dominant electromechanical mode sensitivity analysis method, belonging to the field of a cross technology of dynamic stability analysis and power generation planning of a power system. The method comprises the following steps: acquiring active power of a generator in different operating modes and continuous pole data corresponding to a dominant electrochemical mode through a power system off-line model; establishing a multiple linear regression model between the active power of the generator and the dominant electrochemical mode; and solving the multiple linear regression model through a stepwise regression method and a least square method to obtain the sensitivity of the active power of the generator to the power system dominant electrochemical mode. According to the method, the sensitivity result is obtained by data regression analysis, the problem of numerical calculation is avoided when a large-scale power system linear model partial derivative Jacobi matrix is solved, the interference of unrelated generators to the sensitivity calculation is alleviated, and the calculation efficiency is improved. The sensitivity result obtained by the method finally provides a basis for the dynamic stability analysis of the power system.
Description
technical field [0001] The invention relates to a sensitivity analysis method of a dominant electromechanical mode of a power system based on stepwise regression, and belongs to the cross technical field of power system dynamic stability analysis and power generation planning. Background technique [0002] With the development of the scale of the interconnected power grid, the system operation faces difficulties such as operation mode arrangement, power flow control and peak shaving, as well as various stability problems such as dynamic and transient stability, which seriously threaten the safe and stable operation of the power system. [0003] At present, the basic strategy to solve the above security problems is to "trade conservatism for reliability", resulting in waste of investment. Since the system operation mode is closely related to the system dynamic stability, the purpose of stabilizing the system and increasing the safety margin and stability margin can be achieve...
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IPC IPC(8): G06F19/00
Inventor 门琨涂亮张俊勃柳勇军陆超
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD