Frequency control of power system including PV and wind farms by using output frequency band control of HVDC interconnection line

Abstract

Due to serious environmental issues in recent years, renewable energy has been focused on all over the world to solve the issues. However, because of indirect characteristics such as variations of solar radiation intensity or wind speeds, the output of power generation utilizing renewable energy becomes unstable. As a result, frequency and voltage in the power system can fluctuate. To solve this problem, various methods to control the frequency variations have been studied and reported until now, one of which is based on High voltage direct current (HVDC) transmission line. This paper proposes a novel control scheme to reduce the frequency variations due to large penetrations of wind power and photovoltaic (PV) power, which is introduced to power flow control of HVDC transmission line with utilizing a notch-band pass filter in its frequency control system.

Keywords

• power system interconnection
• hvdc power transmission
• load flow control
• photovoltaic power systems
• frequency control
• distributed power generation
• renewable energy sources
• wind power plants
• band-pass filters
• frequency control system
• notch-band pass filter
• hvdc transmission line
• power flow control
• photovoltaic power
• wind power
• novel control scheme
• high voltage direct current transmission line
• frequency variations
• power generation utilizing renewable energy
• solar radiation intensity
• indirect characteristics
• serious environmental issues
• hvdc interconnection line
• output frequency band control
• pv wind farms
• power system