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Integration of Solar PV with Low-Voltage Weak Grid System: using Maximize-M Kalman Filter and Self-tuned P&O Algorithm
摘要： This paper introduces a novel 'self-tuned perturb and observe (P&O)' (SPO) algorithm for quick maximum power point tracking (MPPT) and a novel maximize-M Kalman filter (MMKF) based control technique for optimal operation of 'grid-integrated solar PV system, where linear/nonlinear loads are attached at PCC (Point of Common Coupling)'. Proposed SPO is the improved form of perturb and observe (P&O) algorithm, where inherent problems of traditional P&O like steady-state oscillation, slow dynamic responses and fixed step size issues, are successfully mitigated. Therefore, SPO tracks maximum power peak (MPP) very rapidly and it very accurately extracts maximum power from the PV array. The extracted power is used to meet the active power requirement of loads, and after meeting the load demand, the excess power is supplied to the grid. During power feeding, the power quality and power management are maintained by the MMKF based control technique. In control strategy, the MMKF is used for fundamental harmonic component extraction from the grid voltage and load current, even when the grid voltage is characterized by adverse situations, like sag, swell, harmonic distortion, DC offset etc. Here, the SPO MPPT algorithm and MMKF based control techniques, are tested on a developed prototype. The efficient and reliable performances of SPO MPPT algorithm and MMKF based control algorithm, in dynamic as well as in steady-state condition, are demonstrated under insolation variation conditions, nonlinear loading, as well as in different grid disturbances such as over-voltage, under-voltage, phase imbalance, harmonics distortion in the grid voltage etc.
关键词： MPPT,Solar PV,MMKF,Power quality,Nonlinear Load,SPO
更新于2025-09-23 15:22:29
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[IEEE 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - Maharashtra State, India (2018.6.12-2018.6.13)] 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - A Preliminary Study on Harmonics Generated by the Grid-Connected PV System on Distribution
摘要： Increased generation of Power by Solar Photovoltaic (PV) system is seen as an alternative to fulfill the increased demand of electricity. And hence the increased usage of electrical load devices causes the non-sinusoidal waveforms of current and voltage into the distribution system which is the major reason for increasing operating temperature of transformer, leading to deterioration of the insulation and potential reduction in its life time. Hence this paper sheds some light on the effects of THDi and THDv (Total Harmonics Distortion) and how it affects the life of any distribution transformer. The study is implemented by using MATLAB/Simulink version R2015b software.
关键词： temperature rise,nonlinear load,Distribution transformer,life expectancy,Harmonic distortion
更新于2025-09-10 09:29:36