Photovoltaic power generation and wind power generation have an advantage that energy is clean and infinite, but they have a disadvantage in that electrical output energy is unstable, and initial and maintenance costs are expensive. This paper presents an optimal configuration for renewable generating systems in residence using a genetic algorithm (GA). We define that the objective function is the total cost, where the total cost is the sum of initial cost, an operation cost, and a maintenance cost. We determine an optimal configuration of renewable generating systems, where total cost is more reasonable using GA. The simulation using this technique is shown.

Optimum configuration for renewable generating systems in residence using genetic algorithm

Wind turbine generators and PV system causes fluctuating power condition. Therefore, the fluctuating power causes frequency and voltage fluctuations. In order to solve this problem, we propose a new power supply system by using renewable energy power production plant in isolated island. The feature of this system is to use hydrogen production unit and fuel cell. The operation of suggested system absorbs fluctuating power of renewable energy. Furthermore, the proposed system is able to generate reactive power by using three phase inverter. The effectiveness of the proposed power supply system is shown through simulation results

Generating Power Leveling of Renewable Energy for Small Power System in Isolated Island

Generating power leveling of renewable energy for small power system in isolated island

As a part of various electric power sources, the photovoltaic power system are expected to be one of the important power systems in a near future The authors have developed the computer program of optimizing grid-connected photovoltaic power system from points of view of daily electric load and electrical energy cost In a grid-connected photovoltaic power system (PV system), electric power generated is supplied to distribution line and loadIn this paper, the optimum design of typical private residence with PV system in Tokyo is calculated by using the various system performance models, the cost models, the daily electric load pattern, environmental data and so onIt was found that the capacity of PV system is 26kW when the selling price of surplus power and buying price of shortage one are equivalent And then, the electrical energy cost of the optimum PV system at 2, 000 A D is estimated to be about 35yen/kWh

Optimum Design of a Grid-Connected Photovoltaic Power System

As a part of various electric power sources, the photovoltaic power system are expected to be one of the important power systems in a near future. The authors have developed the computer program of optimizing grid-connected photovoltaic power system from points of view of daily electric load and electrical energy cost. In a grid-connected photovoltaic power system (PV system), electric power generated is supplied to distribution line and load.In this paper, the optimum design of typical private residence with PV system in Tokyo is calculated by using the various system performance models, the cost models, the daily electric load pattern, environmental data and so on.It was found that the capacity of PV system is 2.6kW when the selling price of surplus power and buying price of shortage one are equivalent. And then, the electrical energy cost of the optimum PV system at 2, 000 A. D. is estimated to be about 35yen/kWh.

Hiroyuki Yokouchi

Papers

Optimum Design of a Grid-Connected Photovoltaic Power System

系統連系形太陽光発電システムの最適設計;系統連系形太陽光発電システムの最適設計;Optimum Design of a Grid-Connected Photovoltaic Power System.