Premium
Experimental Study of Power Output Suppression Control of Photovoltaic Power Generation During Electricity Surplus in Electric Power System
Author(s) -
Makita Taiga,
Kato Takeyoshi,
Suzuoki Yasuo
Publication year - 2015
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22505
Subject(s) - maximum power point tracking , photovoltaic system , control theory (sociology) , maximum power principle , power (physics) , electricity generation , stand alone power system , inverter , automotive engineering , engineering , electrical engineering , computer science , voltage , distributed generation , renewable energy , control (management) , physics , artificial intelligence , quantum mechanics
SUMMARY In a future electric power system with a high penetration of photovoltaic power generation systems (PVSs), surplus power may occur during the daytime in the spring or fall when electricity demand is low. Suppressing the PVS power output as well as absorbing the surplus power by using electric storage facilities is a possible countermeasure. By considering fairness among a number of PVSs dispersed in a large area with different insolation levels, this study proposes a method of keeping the PVS power output at the utility's requested ratio to available power. The utility of the proposed method is demonstrated by a simplified experimental PVS setup. In the proposed method, the operation point on the I–V curve is kept at a lower value than the maximum power point ( P PV − X ) so that the mean PV power during a certain period satisfies the requested value. P PV − Xis detected without any additional sensor devices by changing the operation point within a set interval. An experimental test using a test inverter unit demonstrated that the proposed suppression control was effective for maintaining the requested suppression level when insolation was stable. Two types of control modes, the proposed suppression mode and the upper bounded MPPT mode, were applied, and the proposed suppression control worked well for various insolation patterns, as revealed by using a simulation model of the inverter test unit and the insolation data for a year.