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: 2008-11-05
NARI TECH CO LTD +2
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This method has certain requirements on the magnitude and duration of the frequency disturbance, and is only suitable for spot check purposes.
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[0022] The present invention will be further described in detail below with reference to the accompanying drawings and examples. However, the invention is not limited to the examples given.
[0023] This example includes a process in which the frequency of the power grid increases beyond the set value of the frequency regulation dead zone and the unit output decreases, and the method of the invention is used to quantitatively calculate the primary frequency regulation performance in real time.
[0024] A real-time quantitative analysis method for generator primary frequency modulation based on phasor measurement technology, including the following steps:
[0025] (1) Select the initial time of frequency change and the end time of frequency change, and calculate the amount of frequency change;
[0026] (2) Select the initial time of unit output change and the end time of frequency change, and calculate the amount of output change;
[0027] (3) Quantitatively calculate the adj...
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A method for real-time quantitative-analyzing the primary frequency modulation of the generator based on the phasor measuring technique comprises the following steps: 1) selecting a starting time of frequency variation and a finishing time of frequency variation, and calculating the variation quantity of frequency; 2) selecting a starting time of the output variation of the assembly and the finishing time of the frequency variation, calculating the varying quantity of output; and 3) quantitative-calculating the difference modulation coefficient, delay time, dead zone of frequency modulation of the computer group. The method according to the invention has no specific requirement to the magnitude of frequency disturbance and time duration. The frequency disturbance in the electric network can be captured real-time. The disadvantage that formerly the performance of primary frequency modulation only can be qualitatively calculated off-line is compensated. The difference modulation coefficient, the delay time and dead zone of frequency modulation of the primary frequency modulation of the computer group can be accurately fixed quantitatively. Through the analysis to the variation trend to the frequencies and outputs before the primary modulation and after the primary modulation, not only the analysis by the program algorithm is facilitated, but also the artificial verifying the calculated result is facilitated. The effect of small disturbance is removed through setting an amplitude threshold of the peak frequency.
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, the qualitative assessment method is generally used to assess the primary frequency regulation 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 magnitude and duration of the frequency disturbance, and is only suitable for spot check purposes. Therefore, it is necessary to develop a new assessment method to accurately evaluate the primary frequency modulation performance of the unit. The CPS standard puts more emphasis on the role of the primary frequency regulation of the unit, and an accurate...
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Inventor 高宗和闪鑫汪德星崔恒志徐春雷
Owner NARI TECH CO LTD