Hi Community,
I have modelled a grid using a programmable three phase AC voltage source and there are three loads attached to it. Model & Parameter file is attached. The loads 2 and 3 are switched off at T = 2 secs and switched back on at T = 4 secs.
I want to measure the frequency deviation in the 3-ph electrical voltage (magnitude, direction and time duration of instability) during sudden load shedding & load reconnection.
For this I used PLL blocks. Now, Simulink offers a few options for PLL & PLL based PMU blocks and my issue is that each of these blocks gives me a different result for the exact same scenario. I want to know how much frequency deviation is happening, but with each block giving me varying results, how do I conclude which result is accurate?
Frequency Meausurement Outputs

Types of PLL & PMU blocks used

Method 1: Sinusoidal Measurement (PLL, Three-Phase)
Method 2: PLL (3ph)
Method 3: Phasor Measurement Unit (PMU, Three-Phase)
Method 4: PMU (PLL-Based, Positive-Sequence)
Main Model

My base assumption is – frequency deviation in voltage is inherent attribute of the voltage. No matter the measuring mechanism, a frequency of 50 Hz should be measured as 50 Hz +- tolerance.
The same conceptual doubt also extends to the gains of the PLL block. Modifying the gain will affect one or more of frequency deviation characteristics (magnitude, direction and time duration of instability). So how do I narrow down on what gain values would be appropriate?Hi Community,
I have modelled a grid using a programmable three phase AC voltage source and there are three loads attached to it. Model & Parameter file is attached. The loads 2 and 3 are switched off at T = 2 secs and switched back on at T = 4 secs.
I want to measure the frequency deviation in the 3-ph electrical voltage (magnitude, direction and time duration of instability) during sudden load shedding & load reconnection.
For this I used PLL blocks. Now, Simulink offers a few options for PLL & PLL based PMU blocks and my issue is that each of these blocks gives me a different result for the exact same scenario. I want to know how much frequency deviation is happening, but with each block giving me varying results, how do I conclude which result is accurate?
Frequency Meausurement Outputs

Types of PLL & PMU blocks used

Method 1: Sinusoidal Measurement (PLL, Three-Phase)
Method 2: PLL (3ph)
Method 3: Phasor Measurement Unit (PMU, Three-Phase)
Method 4: PMU (PLL-Based, Positive-Sequence)
Main Model

My base assumption is – frequency deviation in voltage is inherent attribute of the voltage. No matter the measuring mechanism, a frequency of 50 Hz should be measured as 50 Hz +- tolerance.
The same conceptual doubt also extends to the gains of the PLL block. Modifying the gain will affect one or more of frequency deviation characteristics (magnitude, direction and time duration of instability). So how do I narrow down on what gain values would be appropriate? Hi Community,
I have modelled a grid using a programmable three phase AC voltage source and there are three loads attached to it. Model & Parameter file is attached. The loads 2 and 3 are switched off at T = 2 secs and switched back on at T = 4 secs.
I want to measure the frequency deviation in the 3-ph electrical voltage (magnitude, direction and time duration of instability) during sudden load shedding & load reconnection.
For this I used PLL blocks. Now, Simulink offers a few options for PLL & PLL based PMU blocks and my issue is that each of these blocks gives me a different result for the exact same scenario. I want to know how much frequency deviation is happening, but with each block giving me varying results, how do I conclude which result is accurate?
Frequency Meausurement Outputs

Types of PLL & PMU blocks used

Method 1: Sinusoidal Measurement (PLL, Three-Phase)
Method 2: PLL (3ph)
Method 3: Phasor Measurement Unit (PMU, Three-Phase)
Method 4: PMU (PLL-Based, Positive-Sequence)
Main Model

My base assumption is – frequency deviation in voltage is inherent attribute of the voltage. No matter the measuring mechanism, a frequency of 50 Hz should be measured as 50 Hz +- tolerance.
The same conceptual doubt also extends to the gains of the PLL block. Modifying the gain will affect one or more of frequency deviation characteristics (magnitude, direction and time duration of instability). So how do I narrow down on what gain values would be appropriate? simulink, frequency measurement, pll, pmu, three phase electrical signals MATLAB Answers — New Questions

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