Coincident Analysis of Photovoltaics Generation and Consumers Consumption Patterns on Distribution Networks

Abstract

The purpose of this paper is to investigate the impact of photovoltaic (PV) distributed generations (DGs) on the operational metrics and short-term planning of distribution networks. In general, grid-connected PV systems are installed to improve the performance of power grids; however, they might adversely affect the electric distribution networks, especially at high penetration levels. These effects depend on the capacity of the PV systems and the power consumption pattern of customers connected to them, including reverse power flow, voltage changes, and increase in losses. To tailor these operational indices, this paper simulates and digs a real-case distribution system in South-Khorasan province of Iran, being integrated with different penetration levels of PV units. Considering different types of consumers’ consumption patterns and load profile behavioral changes, direct load flow approach is implemented to have a power flow snapshot of the network accompanied by adequate simulation records. Based on the obtained results and to prevent these adverse effects, it is necessary to determine the optimal penetration level of PV units in the distribution network, carefully; hence, maximizing their benefits. This optimal penetration level can be calculated according to the generation curve of PV units and the consumption patterns of the customers sweeping in different penetration levels.

Keywords

• Distributed generation (DG)
• photovoltaics (PVs)
• penetration level
• generation and consumption pattern
• distribution network operation