Low cost hybrid reactive power compensator using coordination control strategies

Dynamic dc voltage regulation of split‐capacitor DSTATCOM for power quality improvement

“…Singh et al [17] better compensation at full load higher dc link voltage (i.e. two times peak of PCC voltage) switching losses are more Mishra and Karthikeyan [18] and Manoj Kumar and Mishra [32] compensation is good switching losses are more under reduced or light load conditions dc voltage is reduced to 1.6 times peak of PCC voltage Javadi et al [20] DC voltage is reduced requires three H-bridges with isolated dc sources fed from the auxiliary power supply does not require an isolation transformer Lam et al [24,25] reactive power compensation with optimum dc voltage limited to reactive power and fifth harmonic compensation it requires three extra ac capacitors switching losses are reduced resonance problem Lam et al [26] reduced dc voltage more number of switches required switching losses are reduced complex control and cost high Wei et al [23] low cost more number of switches required DSTATCOM rating is low large-rating of thyristor switched capacitors required compensation fails in the presence of dc off-set in load current Proposed method dynamic dc voltage regulation under full load conditions, the switching losses are high compared to hybrid reduced dc voltage topologies [23,25,26]…”

“…In [21], dc-link voltage was reduced by connecting an ac capacitor in series with the DSTATCOM, so that the ac capacitor voltage was added to ac voltage of the DSTATCOM and leads to reduction in the dc voltage requirement. Further, hybrid filter topologies are proposed to reduce the dc voltage with the combination of active and passive filters [22,23]. In the above discussed DSTATCOM topologies, the dc voltage is constant and its value is selected based on rated reactive load.…”

An Electromagnetic Var Compensator Suitable for Wind Power Access and Its Control Strategy

“…Considering that passive devices and STATCOM have complementary advantages, some scholars proposed combining the two devices in a series and parallel to form a hybrid compensation device, which can take into account the compensation effect and equipment cost simultaneously. In [19,20], a composite system composed of multiple groups of TSCs and STATCOM in parallel was proposed; the voltage drop at the parallel point will directly affect the reactive power output of the TSC, causing the reactive power compensation capacity of the entire device to drop rapidly. In [21], the authors proposed that SVC and STATCOM could be connected in parallel.…”

Real‐time implementation of active shunt compensator with adaptive SRLMMN control technique for power quality improvement in the distribution system

“…Several other controllers are reported in the literature and are based on coordination control strategy [12], optimal predictive scheme [13], frequency-adaptive disturbance observer [14], adaptive Volterra second-order filter [15], affine projection-like algorithm [16], novel decentralised coordinated voltage control scheme [17], fuzzy proportional-derivative and integral control [18], affine projection algorithm [1λ] etc. and have been employed for shunt compensation.…”