access icon free Performance improvement of dynamic PV array under partial shade conditions using M2 algorithm

© The Institution of Engineering and Technology
Received 01/08/2018, Accepted 13/02/2019, Revised 31/12/2018, Published 14/02/2019

Photovoltaic (PV) plants operating under the partial shade condition show an imbalance in the array irradiance and produce less output power. To counteract this problem, reconfigurable PV array or dynamic PV array (DPVA) for changing the inter-connections of PV modules to balance the irradiance distribution has been proposed previously. This study introduces a new strategy, the maximum and minimum (M2) algorithm, to identify global maximum irradiance configuration with a minimal number of interchanges among the PV modules. For the implementation of DPVA, this study introduces a double pole double throw (DPDT) switch network (SN) with less switch-count compared to a conventional SN. Simulations of PV array have been carried out on a 9 × 9 size PV array. Results are compared with the previously reported algorithms. Further, cost–benefit analysis of a 10 kWP grid-tied DPVA plant has been presented. Experimental tests on 4 × 2 size DPVA under different shade conditions are conducted to validate the proposed algorithm and DPDT SN.

Inspec keywords: photovoltaic power systems; power system interconnection; solar cell arrays

Other keywords: array irradiance; partial shade condition; dynamic PV array; maximum-minimum algorithm; global maximum irradiance configuration; M2 algorithm; photovoltaic plant; reconfigurable PV array; double pole double throw switch network; photovoltaic plants; irradiance distribution; power 10 kW; PV modules; p grid-tied DPVA plant; PV module interconnections

Subjects: Solar cells and arrays; Power system management, operation and economics; Solar power stations and photovoltaic power systems; Photoelectric conversion; solar cells and arrays

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