Centralized Control Method for Voltage Coordination Challenges With OLTC and D-STATCOM in Smart Distribution Networks Based IoT Communication Protocol

Abstract

This paper proposes a coordination method for the voltage control devices based on optimal settings of the D-STATCOMs, on the load tap changer (OLTC) transformer and the distributed generations (DGs)-based renewable energy resources (RERs). The central controller is introduced to handle the active smart distribution network (SDN) problems to maintain the voltage profile within its permissible limits, minimize power losses in different operating conditions, and minimize the energy wastage from the distributed renewable energy resources. These problems are formulated as a multi-objective optimization problem. With increasing load demand and RERs in the distribution system, voltage coordination threatens real-time efficiency. In this research work, central controller-based Gorilla Troops optimization (GTO) algorithm is proposed to detect the optimum solutions for the voltage coordination problem. The load demand uncertainty and the stochastic nature of power generated from RERs (PV panels and wind turbines) are considered in the voltage coordination problem due to their significant effects on the operation and planning of the SDN. The proposed SDN has been represented based on the Internet of Things (IoT) communication protocol. It enhances the data and information transfer between the system-connected agents. A practical test system, NDEDC-24 bus radial distribution network from the North Delta Electrical Distribution Company and IEEE-33 node system are used to test and evaluate the proposed method. The results are compared with other well-known evolutionary methods. The proposed method obtains more accurate results than the other methods.INDEX TERMS D-STATCOM, distribution network, Internet of Things, on-load tap changer, voltage coordination.

Decentralised Voltage Regulation through Optimal Reactive Power Flow in Distribution Networks with Dispersed Generation

“…In this regard, DSOs developed various voltage controls to improve voltage quality over MV/LV grids: centralised control, decentralised autonomous control (or local), and decentralised coordinated control [29][30][31]. DSOs, which implement centralised control, send command signals to DERs [32], OLTCs, or STATCOMs [33]; they act as central coordinators and network supervisors in the centralised mechanism, communicating with all the network agents to fully exploit the resources' flexibility. However, centralised control requires the coordinator to constantly have access to all the information needed to operate the grid, which is not always feasible or economically viable.…”

Partition-Global Dual-Layer Collaborative Voltage Control Strategy for Active Distribution Network With High Proportion of Renewable Energy

“…At the moment, there are many main areas of focus for voltage management in active distribution networks., including regulating the OLTC tap at the substation [1][2][3], switching reactive power compensation devices [4][5][6], network reconstruction [7][8][9], voltage regulation of energy storage devices [10,11], and regulating photovoltaic inverters [12][13][14][15]. Reference [16] proposes a hybrid integer semidefinite programming network reconfiguration model that utilizes string relaxation to minimize the cost while adhering to voltage regulation.…”

A Comprehensive Review on STATCOM: Paradigm of Modeling, Control, Stability, Optimal Location, Integration, Application, and Installation

“…Experimental results show this method can minimize the negative sequence voltage as well as control voltage unbalance in the event of a fault. A central controller-based Gorilla Troops Optimization (GTO) algorithm for optimal parameter setting of distributed STATCOM is proposed in [12]. This algorithm is tested on an IEEE 33-node system and a North Delta Electrical Distribution Company 24-bus radial network.…”