Abstract
In response to the power impact effect resulting from merging large-scale offshore wind farms (OWFs) into the Taiwan Power (Taipower) Company (TPC) system in the future, this study aims to discuss the situation where the offshore wind power is merged into the power grids of the Changbin and Changlin areas, and study a Low-Voltage Ride-Through (LVRT) curve fit for the Taiwan power grid through varying fault scenarios and fault times to reduce the effect of the tripping of OWFs on the TPC system. The Power System Simulator for Engineering (PSS/E) program was used to analyze the Taipower off-peak system in 2018. The proposed LVRT curve is compared to the current LVRT curve of Taipower. The research findings show that if the offshore wind turbine (OWT) set uses the proposed LVRT curve, when a fault occurs, the wind turbines can be prevented from becoming disconnected from the power grid, and the voltage sag amplitude of the connection point during the fault and the disturbances after the fault is cleared are relatively small. In addition, according to the transient stability analysis results, the system can return to stability after fault clearance, thereby meeting the Taipower transmission system planning criteria and technical key points of renewable energy power generation system parallel connection technique.
Highlights
With the rise of environmental considerations and the growth of renewable technology, various countries’ energy strategies have proposed increasing the ratio of renewable energy in succession to decrease their dependence on thermal power plants
In [21], approaches to studies a Low-Voltage Ride-Through (LVRT) curve fit for wind turbines according to different fault scenarios and fault times improve LVRT capability, such as increases in rotor impedance, choppers, and arc suppression circuits, after a 520 MW offshore wind generating set is merged into Taipower
H (Figure 8d) substations were more severe if the TPC LVRT curve was adopted than if the proposed LVRT curve was adopted because of the circuit trips in the offshore wind turbine (OWT); the times for voltage recovery to 0.9 p.u. after fault clearance were longer if the TPC LVRT curve was adopted, and the disturbance to the system was higher
Summary
With the rise of environmental considerations and the growth of renewable technology, various countries’ energy strategies have proposed increasing the ratio of renewable energy in succession to decrease their dependence on thermal power plants. In [21], approaches to studies a LVRT curve fit for wind turbines according to different fault scenarios and fault times improve LVRT capability, such as increases in rotor impedance, choppers, and arc suppression circuits, after a 520 MW offshore wind generating set is merged into Taipower. The LVRT characteristics of wind turbines island power system, which focused is special, anddirect considering the present green energy development were examined in [22], which on the current capacitor voltage of the transducer in a planning, power and to enhancement of the grid connection level, the single unit. Grid wind in Changbin andIntroduction the existingtosea area opened offshore power generation planning site application operation key points, the total development potential estimated substations at about 23 GW sites are and.
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