Electric generator one time frequency modulation real time quantitative analysis method based on phasor measuring technique
A phasor measurement and quantitative analysis technology, applied in the field of real-time quantitative analysis of primary frequency modulation of generators based on phasor measurement technology, to achieve the effect of facilitating calculation results and analysis
Inactive Publication Date: 2009-11-04
NARI TECH CO LTD +2
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method has certain requirements on the magnitude and duration of the frequency disturbance, and is only suitable for spot check purposes.
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
[0022] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. However, the present invention is not limited to the examples given.
[0023] This example includes a process in which the power grid frequency increases beyond the set value of the frequency modulation dead zone and the unit output decreases. The method of the present invention is used to quantitatively calculate the primary frequency modulation performance in real time.
[0024] The real-time quantitative analysis method of generator primary frequency modulation based on phasor measurement technology includes the following steps:
[0025] (1) Select the initial time of frequency change and the end time of frequency change to calculate the amount of frequency change;
[0026] (2) Select the initial time of unit output change and the end of frequency change to calculate the amount of force change;
[0027] (3) Quantitative calculation of th...
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 real-time quantitative analysis method of generator primary frequency modulation based on phasor measurement technology includes the following steps: 1) Select the initial time of frequency change and the end time of frequency change, and calculate the amount of frequency change; 2) Select the initial time of unit output change and the end time of frequency change , to calculate the output variation; 3) Quantitative adjustment coefficient, delay time, frequency modulation dead zone of the computer group. By adopting the method of the present invention, there is no specific requirement on the magnitude and duration of the frequency disturbance, and the frequency disturbance in the power grid can be captured in real time; it makes up for the deficiency that the performance of the primary frequency modulation can only be qualitatively calculated offline in the past, and accurately quantifies the coefficient of the primary frequency modulation of the computer group, Delay time, frequency modulation dead zone; by analyzing the change trend of frequency and output before and after a frequency modulation, it is not only convenient for program algorithm analysis, but also convenient for manual verification of calculation results; by setting the threshold of peak frequency amplitude, the influence of small disturbances can be removed.
Description
Technical field [0001] The invention relates to a real-time quantitative analysis method for primary frequency modulation of a generator, in particular to a real-time quantitative analysis method for primary frequency modulation of a generator based on phasor measurement technology. Background technique [0002] At present, a qualitative assessment method is generally used to assess the primary frequency modulation performance of the unit. After a large frequency fluctuation occurs in the power grid, the frequency and unit output before and after the accident are analyzed offline. This method has certain requirements on the size and duration of the frequency disturbance, and can only be suitable for the purpose of spot checks. Therefore, it is necessary to develop a new evaluation method to accurately evaluate the primary frequency modulation performance of the unit. The CPS standard emphasizes the function of the primary frequency regulation of the unit, and an accurate and effe...
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 Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R31/34
Inventor 高宗和闪鑫汪德星崔恒志徐春雷
Owner NARI TECH CO LTD