Development of the Simulation and Control System for an Integrated Solar Energy Generation and Storage

Abstract

When photovoltaic stations operate, providing large populated areas of the planet, and generating significant amounts of electrical energy, problems often arise due to the inconstancy of the flux of incident solar radiation. This leads to failures in the operation of electrical networks and rapid wear of equipment. By equipping such facilities with new systems for the control and monitoring of photovoltaic parameters, it is possible to significantly increase the generation of electrical energy supplied to the general or local power system, and improve the efficiency of the electrical installations located at the solar power plant. The proposed work presents a general approach to modeling and controlling the operation of photovoltaic systems (PV systems). The necessary data for modeling are provided by manufacturers in the form of tables. The processing of this data provides experimenters and engineers with a convenient way to investigate the problems of integrating photovoltaic systems into uninterruptible generation installations to supply individual consumers. The two-stage power conversion system (PCS) proposed in this article works in conjunction with a photovoltaic generating system. The electrical energy storage system (BESS system) uses rechargeable batteries and can be connected to the DC circuit by means of a bidirectional converter. Thus, the BESS system may provide some auxiliary services that may be needed to improve operational efficiency during the generation process. This article describes a special system of uninterrupted operation (FRT-system), which allows you to create the possibility of uninterrupted operation and the generation of electrical energy by the generation system, in case of incorrect operation of individual nodes (for example, with partial shading of solar modules). The operation of an integrated generation system, an electric energy storage system (BESS-system) and a photovoltaic system (PV-system), together with the corresponding control systems simulated on Matlab platforms and the simulation results confirm the efficiency of the controller. When introducing the proposed systems at existing and under construction solar power plants (SPP), it is possible to significantly improve the efficiency of their work and increase the generation of electricity for consumers.

Mathematical Modeling and Controller for PV System by Using MPPT Algorithm

“…At steady-state case, the system oscillates about the peak power point. When the power reaches the peak value, the power variation will be small [18][19][20]. The flowchart of the P&O algorithm of the maximum power tracking isshown in figure 2, where V(n), I(n) and P(n) -are the current-voltage, current and power of the PV panel respectively [21].…”

Analysis and Selection of the Optimal Performance Control Method for Solar Cell Dc Converters

“…Тем не менее индивидуальные характеристики преобразователей постоянного тока, взаимодействующих с силовой электроникой, в отношении изменения коэффициента заполнения при реализации MPPT еще предстоит тщательно изучить. Изменение коэффициента заполнения оказывает последующее различное влияние на рабочие параметры преобразователя постоянного тока, что может привести к нарушению конструктивных ограничений топологии преобразователя [9][10][11], как приращение содержания пульсаций в токе индуктора и в выходном напряжении.…”

Comparison of Control Method System by Using Perturbation and Observation Algorithms and Fuzzy Logic for the Maximum Power Point Control in Photovoltaic Systems

“…Ключевые слова: нечеткое управление, понижающий преобразователь, точка максимальной мощности (ТММ), зарядное устройство для солнечных батарей, фотоэлектрическая система. Данная исследовательская работа предлагает стратегию управления питанием с использованием контроллера нечеткой логики для фотоэлектрической системы, подключенной к сети, путем планирования и управления потоком энергии между фотоэлектрическими батареями, аккумуляторными батареями и сетью [7][8][9].…”