A Modified Active Power Control Scheme for Enhanced Operation of PMSG Based WGs

ABSTRACT:

This paper underlines the improvement of a disentangled dynamic power control plot for upgraded task of network incorporated lasting magnet synchronous generator (PMSG) based breeze driven generators (WGs). A functioning force reference age conspire is proposed for the machine side converter (MSC) to infuse dynamic power into the lattice even under matrix unsettling influences, without damaging framework parts rating. In this plan, the controller utilized for MSC changes the dynamic power caught proportionate to the drop in the network voltage after considering wind speed and rotor speed. Moreover, not at all like double vector control plot, the framework side converter (GSC) controller is executed in a positive synchronous edge (PSF) with the proposed current swaying undoing plan to smother the motions in dc-interface voltage, dynamic and responsive intensity of the lattice and to get symmetrical sinusoidal matrix current. Broad scientific reenactment has been done in PSCAD/EMTDC to approve the prevalence of proposed control conspire over the customary plans when WG is exposed to different network unsettling influences. The diminished level of swaying in the framework parameters, for example, dc-interface voltage and lattice dynamic power affirms the viability of the proposed strategy when contrasted and the traditional control procedures.

 

 BLOCK DIAGRAM:

 Fig.1 PMSG based grid integrated WG.

 EXPECTED SIMULATION RESULTS:

 

Fig.2 Behavior of PMSG based WG during step change in wind speed (a) wind speed profile, m/s; (b) rotor speed, rad/s; (c) dc-link voltage, V; (d) grid active power, W; (f) grid current, A.

 Fig.3 Performance evaluation of proposed controller for the voltage profile of IEGC during symmetrical fault: (a) grid phase voltage, V; (b) MSC active power reference and grid power, W; (c) rotor speed, rad/s; (d) electromagnetic torque, N-m; (e) dc-link voltage, V; (f) grid current, A.

Fig.4 Performance of controllers (I, II and proposed controller) during Type – F fault of 50% voltage sag with -12.5o phase-angle jump (a) dc-link voltage, V; (b) grid active power, W; (c) grid current, A. (d) grid current loci in stationary reference frame during fault period

Fig.5 Performance of controllers (I, II and proposed controller) under distorted utility (a) grid active power, W; (b) grid current, A (zoomed in view).

 CONCLUSION:

A changed dynamic power control and current swaying dropping plan are proposed for the MSC and GSC, separately to reinforce the FRT consistence of the PMSG based WG. A 1.5 MW framework is considered to approve the execution of proposed controller. Decreased dynamic power control proportionate to held matrix voltage amid blame conditions ensures the dc-interface voltage and GSC crest current are inside its working points of confinement. Dissimilar to double vector control plot, the GSC is executed in PSF with wavering dropping terms and positive grouping lattice rakish recurrence to smother the swaying in framework parameters and to acquire symmetrical sinusoidal matrix current. The control conspire is approved for different kinds of blame and twisted network conditions. The diminished level of swaying in the framework parameters as recorded in Table I affirms the viability of the proposed strategy when contrasted and the controllers (I) and (II). As a future work, the proposed control plan can be conveyed to address feeble matrix condition with an ad libbed structure.

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