Coordinated-Control Strategy of Photovoltaic Converters and Static Synchronous Compensators for Power System Fault Ride-Through

A review ofSTATCOMcontrol for stability enhancement of power systems with wind/PVpenetration: Existing research and future scope

“…During grid faults in a weak power network, the voltage at the PCC might not be restored due to the incapability of the WT/PV‐inverters to provide sufficient reactive power and voltage support and there could be a possibility of voltage instability. However, based on the d‐q control strategy (as depicted in Figure 6), STATCOMs can play a very important role to reduce the risk of voltage instability by providing dynamic reactive power compensation during a sudden voltage dip, thus enhance the stability performance of wind/PV‐integrated power systems 63,64 . In view of the facts that the voltage sag/swell at the PCC also causes large variations in electromagnetic torque of WTGs 65 or the severe fault in the presence of high PV‐penetration deteriorates the transient rotor angle stability, 34 incorporation of STATCOMs with additional damping controller not only stabilizes the WTGs but also enhances the rotor angle stability of the SGs 66,67 .…”

“…For this purpose, different types of coordination control frameworks are illustrated in the literature and can be classified as decentralized, centralized, and distributed. Decentralized coordination control does not use any communication structure among control entities and solely relies on local measurements 21,64,65,124‐127 . In contrast, centralized control utilizes a supervisory control employing a sophisticated communication link 22,128,129 .…”

“…To solve the multi‐objective optimization model for minimizing both voltage deviations and low‐frequency oscillations, a normalized simulated annealing (NSA) algorithm is used. Considering the STATCOM and PV inverter, two types of coordinating schemes are discussed 64,126 . One is based on a staged reactive power PI‐controller, which utilizes the output reactive current control signal of the STATCOM as an input of the PV inverter 64 .…”

“…Considering the STATCOM and PV inverter, two types of coordinating schemes are discussed 64,126 . One is based on a staged reactive power PI‐controller, which utilizes the output reactive current control signal of the STATCOM as an input of the PV inverter 64 . In this way, the STATCOM is mainly responsible for generating reactive power unless additional reactive power is also required from the PV inverter to overcome a severe fault.…”

Online API Controller for Performance Improvements in Multilevel STATCOMs

“…A STATCOM has actively been utilized in grid-connected alternative energy applications due to its capability for enhancing system performance and mitigating renewable source integration into the grid [6]. Moreover, in [7], the coordination of the control strategy between the PV power system and STATCOM during grid disturbance was studied. In a distribution network, to deliver power with superb quality, distributed STATCOMs play a vital role in mitigating voltage fluctuations and promoting the voltage profile [8].…”