Papers by amrit mandal
Self-publish, 2026
The sizing of AC conductors in grid-connected solar photovoltaic (PV) systems requires applicatio... more The sizing of AC conductors in grid-connected solar photovoltaic (PV) systems requires application of the IEC 60364-5-52 K-factor derating methodology, which corrects the base cable ampacity for four installation-specific parameters: burial depth (K1), ground temperature (K2), soil thermal resistivity (K3), and circuit grouping (K4). The combined derating factor-the product of all four K-factors-is applied to the base ampacity to determine the maximum permissible design current for a given cable cross-section. Voltage drop must be independently verified for both low-voltage (≤1kV) and highvoltage (>1kV) cable circuits using the appropriate formula for each voltage class and phase configuration. This article presents the complete mathematical framework for IEC-compliant AC cable sizing in PV systems, analyses the most common derating omissions and their thermal consequences, and introduces a freely accessible computational tool that applies this methodology against real cable data from a validated conductor database, supporting both LV and HV cable types across direct burial, free-air, and conduit installation methods.
Self-Published, 2026
Solar photovoltaic (PV) string sizing determines the number of modules connected in series to for... more Solar photovoltaic (PV) string sizing determines the number of modules connected in series to form each string supplying an inverter MPPT input, subject to four simultaneous voltage and current constraints: (1) the temperature-corrected open-circuit voltage at minimum cell temperature must not exceed the inverter's maximum DC input voltage; (2) the temperature-corrected maximum power point voltage at maximum cell temperature must meet or exceed the inverter's MPPT minimum voltage; (3) the maximum power point voltage at Standard Test Conditions should fall within the MPPT operating window; and (4) the combined string current must not exceed the per-MPPT maximum input current. The temperature correction of Voc is safety-critical: neglecting it leads to systematic underestimation of the maximum string voltage in cold climates,
The project feasibility study report represents the data required to assess a solar PV project’s ... more The project feasibility study report represents the data required to assess a solar PV project’s techno-commercial viability at the very initial stage. The key features of the reports are – Climate data assessment, energy generation prediction throughout the plant’s lifecycle and the cash-flow of project including project initial & recurring investment, gross & net cash-flow, Project IRR, Payback, DSCR etc.
10MW Solar PV Project Assessment and Synopsis (SPAnS) Report - By indecons.co
An assessment, estimate & Synopsis of Solar 10MW Solar PV Power Plant BOQ, Energy Yield (Generati... more An assessment, estimate & Synopsis of Solar 10MW Solar PV Power Plant BOQ, Energy Yield (Generation) data Financial Overview.
K o l k a t a , W e s t B e n g a l I n d i a + 9 1 8 1 1 6 4 0 1 0 5 2 A m r i t . m a n d a l 0... more K o l k a t a , W e s t B e n g a l I n d i a + 9 1 8 1 1 6 4 0 1 0 5 2 A m r i t . m a n d a l 0 1 9 1 @ g m a i l . c o m
Teaching Documents by amrit mandal
Self-Published, 2026
Correct sizing of grid-connected inverters is a fundamental requirement for the safe, compliant, ... more Correct sizing of grid-connected inverters is a fundamental requirement for the safe, compliant, and yield-optimised operation of photovoltaic (PV) power systems. The DC/AC ratio-defined as the ratio of the PV array's peak DC power to the inverter's rated AC output-is the primary design variable in inverter selection, and its optimisation requires simultaneous verification of five interdependent compliance criteria: DC/AC ratio within preferred limits, total AC capacity adequacy, AC coverage sufficiency, inverter unit count compliance, and MPPT voltage window compatibility. This article presents the mathematical framework underpinning IEC-compliant inverter sizing, discusses systematic design errors encountered in commercial PV practice, and introduces a freely accessible computational tool that applies this methodology against real manufacturer inverter data sourced from a validated component database.
Self-published, 2026
Correct conductor sizing for solar photovoltaic (PV) DC and AC circuits is a prerequisite for saf... more Correct conductor sizing for solar photovoltaic (PV) DC and AC circuits is a prerequisite for safe, standards-compliant, and thermally stable installation design. The sizing process requires determination of the minimum cable cross-section that satisfies three simultaneous criteria: derated ampacity exceeding the design current (with mandatory 1.25× safety factor per IEC 60364-5-52), voltage drop within the limits specified by IEC 60364-7-712, and a minimum ampacity safety margin of 125% over design current. Both temperature derating and grouping/bundling derating must be applied to the base ampacity before comparison to the design current-a step frequently omitted in practice. This article presents the mathematical framework underlying IEC-compliant PV cable sizing, examines common design errors and their thermal consequences, and introduces a freely accessible computational tool that applies this methodology against real cable data from a validated conductor database.
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Papers by amrit mandal
Teaching Documents by amrit mandal