Real time assessment of power quality issues in 11 kV/440 V distribution feeder using distribution static synchronous compensator

Abstract

The effects of power quality (PQ) issues in a distribution feeder occur due to abnormal load condition. In this paper, first, the real time PQ issues in an 11 kV/440 V distribution feeder are measured and analyzed by PQ analyzers. The sudden load fluctuations in the distribution system result in different PQ issues such as voltage sag/swell, transient, flicker and harmonics. Then, an improved interactive distribution static synchronous compensator (D-STATCOM) is installed in distribution feeder to mitigate the PQ issues. A novel control algorithm will operate the interactive D-STATCOM in voltage control mode (VCM) or current control mode (CCM). At normal operating conditions, the D-STATCOM operates in CCM, during abnormal condition the D-STATCOM will operates in VCM to mitigates the PQ issues. The D-STATCOM is modeled and simulated in MATLAB-SIMULINK environment. The field programmable gate array (FPGA)-based laboratory prototype D-STATCOM has been developed to validate the function of the controller.

Power quality control method of flexible AC transmission project based on harmonic suppression

“…Where 1  and 2  are the voltage weighting factor and reactive power weighting factor, respectively; 3  and 4  are the loss weighting factor and harmonic function weighting factor, respectively; 1…”

“…In the transmission project, in addition to the traditional power quality problems such as temporary power failure, voltage transient drop, voltage flicker, frequency deviation, harmonic interference and three-phase unbalance, there are also power quality problems arising from the special connection between micro power sources or transmission projects and the large power grid [1] . The basis of power quality control is to detect the power quality problems of the grid.…”

Voltage Flicker Detection Based on Probability Resampling

“…With the development of microelectronics, signal processing, communication, and other technologies, flicker detection algorithms usually need to run in embedded systems to achieve the portability and networking of detection equipment. For example, Reference [19] designed an Field Programmable Gate Array (FPGA) chip-based power quality detection instruments. Reference [20] introduced an Advanced RISC Machines (ARM) flicker detector.…”