Method for detecting power grid frequency by using optimal multiplier Newton algorithm
A Newton algorithm, grid frequency technology, applied in the direction of frequency measurement devices, etc., can solve the problem that the real-time and accuracy of grid frequency detection cannot be solved.
A Newton algorithm, grid frequency technology, applied in the direction of frequency measurement devices, etc., can solve the problem that the real-time and accuracy of grid frequency detection cannot be solved.
CN102508022BInactive Publication Date: 2013-07-10SICHUAN UNIV
Image
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0052] Given a sinusoidal test signal, defined as follows:
[0053] t≤0.02s V=30 f=45Hz V 0 =0
[0054] t>0.02s V=35 f=50Hz V 0 =5
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 discloses a method for detecting power grid frequency by using an optimal multiplier Newton algorithm. The method is characterized by being capable of simultaneously detecting a peak value of power grid voltage, a power grid frequency, a direct current component and an initial phase angle. The calculation is accurate when the frequency is perturbed greatly, the algorithm is simple, the convergence speed is high, the anti-jamming capability is strong and the method is suitable for online application.
Description
technical field [0001] The invention relates to a method for detecting the frequency of a grid by using an optimal multiplier Newton algorithm, which belongs to the field of automatic control of electric power systems. Background technique [0002] Grid frequency is one of the three major indicators for evaluating power quality, and it is also an important basis for implementing power system security and stability control. Therefore, grid frequency detection has become an important technology in the field of automatic control of power systems. [0003] At present, the more commonly used power grid frequency detection method is the original periodic method. This method detects the zero-crossing point of the voltage signal waveform and calculates the time interval between two adjacent zero-crossing points to calculate the frequency. This method has a clear physical concept and is easy to implement, but its accuracy is low, it is easily interfered by signals such as harmonics ...
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
10 Jul 2013
Publication
CN102508022B
- IPC
- G01R23/02
- Inventors
- 李兴源; 程丽敏