Investigation of the Impact of Large-Scale Wind Power and Solar Power Plants on a Vietnamese Transmission Network

Abstract

Integrating wind power and solar power plants into a power system has significantly grown over the past decade and is expected to grow to unprecedented levels in the coming years. In Vietnam, much large-scale wind power and solar power plants have been built and connected to the power system in recent years. To investigate and evaluate the impact of these power plants on system power operation, the 110kV power transmission network of Binh Dinh province in Vietnam is used in this paper. In the system, the Phuong Mai 3 wind power plant with a capacity of 21MW, the Fujiwara solar power plant with a peak capacity of 50MWp, and the Cat Hiep solar power plant with a peak capacity of 49.5MWp are modeled by using the PSS/E software to simulate and analyze their impacts on power system stability of the 110kV transmission network in Binh Dinh province, Vietnam. Besides, the control strategies of these power plants are also established to investigate their impacts on the network. In addition, this paper proposes three typical scenarios for the wind power and solar power plants in the system. For each scenario, the grid's operating parameters such as voltage variations and frequency variations are acquired for analyzing and evaluating their impacts on the frequency and voltage variations of the network. The simulation results show that the 110kV power transmission network remains in a stable operation mode after the fault scenarios for the wind and solar power plants. Furthermore, these simulation results provide some guidance for the actual operation

Methods for Fault Location in High Voltage Power Transmission Lines: A Comparative Analysis

“…The new technique for online tracking of fault location in distribution networks was introduced in Ahmed et al (2021) to enhance system reliability and continuity of supply. Based on two-end measurements, Christos et al (2022) proposed the two formulations of fault location algorithm which was appropriate for unbalanced medium voltage overhead distribution systems of radial network with or without distributed generations (Khoa, Van, Hung and Tuan, 2022;Saad et al 2018). The fault location algorithm based on synchronous phasor measurement for shunt-compensated lines under dynamic conditions was proposed to overcome the uncertainties in the controller parameters of the shunt compensator device (Deng et al 2022;Khoa et al 2017).…”

“…In this paper, to perform the comparative analysis of impedance-based methods for locating fault in power transmission lines, a practical Vietnamese electric transmission line (Khoa, Van, Hung and Tuan 2022) Similarly, the TH receiving source is represented by an ideal voltage source with ER = 1.00.0 o pu behind an equivalent positive-and zero-sequence impedance of ZR1 = 12.071.0 o Ω and ZR0 = 30.065.0 o Ω, respectively. In addition, the SEL-441L protection relays of the two ends receive the current and voltage signals from the current and voltage transformers, respectively to trip the fault current.…”