Method of identifying sensitivity in damping ratio of leading electromechanical mode of power system
A technology of power system and damping ratio, applied in the fields of electrical digital data processing, instrumentation, calculation, etc., can solve problems such as large amount of calculation, and achieve the effect of avoiding modeling difficulties
Active Publication Date: 2014-01-29
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF1 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, when the scale of the power system is very large, the above method not only has a large amount of calculation, but also may have numerical calculation problems when solving the partial derivative Jacobi matrix
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The damping ratio sensitivity identification method of the dominant electromechanical mode of the power system proposed by the present invention comprises the following steps:
[0031] (1) The active power of multiple generators in the power system under the set operation mode is collected in real time with the sampling period T, and the average active power of each generator within the collection time window M is used as the active power P of the generator, And collect the dynamic response noise data y of the power system within the collection time window M;
[0032] (2) According to the above dynamic response noise data y, the stochastic subspace method is used to perform reduced-order modeling of the power system under the above operation mode, and the following reduced-order state equation is obtained:
[0033] x ( k + 1 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method of identifying sensitivity in damping ratio of leading electromechanical mode of a power system and belongs to the field of crossing techniques of dynamic stability analysis and power generation planning for power systems. The method includes: acquiring active power and dynamic response noise data of multiple generators in the power system in real time, identifying to obtain a damping ratio of the leading electromechanical mode of the power system, establishing a multiple linear regression model for the active power and leading electromechanical mode in multiple generators, and solving the model to obtain the sensitivity in the damping ratio of the active power to leading electromechanical mode of the multiple generators in the power system. The method has the advantages that independence on power system offline models is avoided, the sensitivity can be identified by online operation, the problems that modeling difficulty and high calculation amount occur in the process of solving the sensitivity in the damping ratio of the leading electromechanical mode of the large-scale power system by the traditional method and numeric calculation problems occur in the process of solving the derivative Jacobi matrix by the traditional method are solved, and the sensitivity calculation results provide basis for the analysis on stability of the power system.
Description
technical field [0001] The present invention relates to a damping ratio sensitivity identification method of a dominant electromechanical mode in a power system, in particular to a damping ratio sensitivity identification method for a dominant electromechanical mode in a power system based on a wide-area noise signal, which belongs to the field of power system dynamic stability analysis and power generation planning cross-technical fields. 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 operat...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G06F19/00
Inventor 张俊勃陆超门琨涂亮柳勇军
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD