Behaviour of Distribution Grids with the Highest PV Share Using the Volt/Var Control Chain Strategy

Abstract

The large-scale integration of rooftop PVs stalls due to the voltage limit violations they provoke, the uncontrolled reactive power flow in the superordinate grids and the information and communications technology (ICT) related challenges that arise in solving the voltage limit violation problem. This paper attempts to solve these issues using the LINK-based holistic architecture, which takes into account the behaviour of the entire power system, including customer plants. It focuses on the analysis of the behaviour of distribution grids with the highest PV share, leading to the determination of the structure of the Volt/var control chain. The voltage limit violations in low voltage grid and the ICT challenge are solved by using concentrated reactive devices at the end of low voltage feeders. Q-Autarkic customer plants relieve grids from the load-related reactive power. The optimal arrangement of the compensation devices is determined by a series of simulations. They are conducted in a common model of medium and low voltage grids. Results show that the best performance is achieved by placing compensation devices at the secondary side of the supplying transformer. The Volt/var control chain consists of two Volt/var secondary controls; one at medium voltage level (which also controls the TSO-DSO reactive power exchange), the other at the customer plant level.

Advanced Approaches, Business Models, and Novel Techniques for Management and Control of Smart Grids

“…This technique makes robust decisions against uncertainty of the input parameters. The optimal bidding strategy in day-ahead electricity market considering uncertainties of market price is performed by implementing IGDT in [74]. Nojavan et al [75] proposed a method based on IGDT to evaluate procurement strategy of large consumers.…”

“…• the var set point varPC CP inv of the inverter connected on CP link grid; while respecting the var constraint on the border with LV varCns CP LV Some practical applications of Equation ( 5) are shown in Section 3.3.4 and in reference [74]. Abstract: The ideal distributed network composed of distributed generations (DGs) has unweighted and undirected interactions which omit the impact of the power grid structure and actual demand.…”

Design of the Smart Grid Architecture According to Fractal Principles and the Basics of Corresponding Market Structure

“…where VVSC MV calculates: • the var set point varPC CP inv of the inverter connected on CP link grid; while respecting the var constraint on the border with LV varCns CP LV Some practical applications of Equation (5) are shown in Section 3.3.4 and in reference [74].…”

Effect of Individual Volt/var Control Strategies in LINK-Based Smart Grids with a High Photovoltaic Share

“…It divides the power system into chains of grid-, producer-, and storage-links, which fit one into another to establish flexible and reliable electrical connections [28]. The standardized structure of LINK-based smart grids allows for realizing the Volt/var process in the horizontal and vertical axes as chain controls that minimize the necessary data exchanges [29]. While the horizontal axis includes the interconnected high voltage (HV) grids, the vertical ones contain all system levels, i.e., HV, MV, LV, and CP levels [30].…”