A Solution to the Parameter Selection and Current Static Error Issues With Frequency Shift Islanding Detection Methods

Abstract

2020) 'A solution to the parameter selection and current static error issues with frequency shift islanding detection methods.', IEEE transactions on industrial electronics. .

Compatibility Issues With Irregular Current Injection Islanding Detection Methods in Multi-DG Units Equipped With Grid-Connected Transformers

“…Some methods disturbed reactive currents/power [12]- [14]. In [15], the disturbance to the rate of change of reactive current was proposed, which basically eliminated the current static error resulting from the frequency shift methods, and then a practical parameter selection scheme was developed.…”

“…In conclusion, considering PSBFs in the SP system, Tl_tr should be set as (14), where Nclk is the nominal clock position of the transformer, and fiir should be selected from (15). Afterward, there is still the optimal condition that the irregular currents injected into the grid through transformers and those directly injected are in phase.…”

Modified Q–f Droop Curve Method for Islanding Detection With Zero Non-Detection Zone

“…It means the performance of reactive power reference is different and the islanding detection time might be longer. The islanding detection method in [27] was proposed to eliminate the current static error in frequency shift islanding detection method. It has a fast detection time with a very good performance.…”