The grid voltage

This paper proposes a low-voltage ridethrough (LVRT) capability for a doubly-fed induction generator (DFIG) wind turbine (WT) system. With the proposed method, series grid-side converter (SGSC) in which its DC-side connected at the DC bus of the back-toback converters and its AC-side connected in series with line through transformer have been applied, enables to compensate a voltage response of the system during the grid faults and to reduce the capital cost.

9p vithomson 02-07-2024 0 0   Download

Part 1 book "High voltage engineering and testing" included contents: Electric power transmission and distribution systems; insulation co ordination for AC transmission and distribution systems; applications of gaseous insulants; HVDC and power electronic systems; the implications of renewable energy on grid networks; high voltage cable systems; gas filled interrupters – fundamentals; switchgear design, development and service; distribution switchgear; differences in performance between SF6 and vacuum circuit breakers at distribution voltage levels.

457p dianmotminh04 12-07-2024 0 0   Download

Part 2 book "Energy systems - Intelligent solutions for electricity transmission and distribution networks" includes content: A robust iterative learning control algorithm for uncertain power systems; damping of power system oscillations with optimal regulator; design of three phase LCL filter for grid connected pwm voltage source inverter using bacteria foraging optimization; real time monitoring of incipient faults in power transformer; advanced short circuit analysis for the assessment of voltage sag characteristics,... and other contents.

162p dianmotminh03 11-06-2024 5 2   Download

Part 2 book "Renewable energy utilisation and system integration" includes content: Radio frequency energy harvesting - sources and techniques; renewable energy, emissions, and health; distributed renewable power sources in weak grids — analysis and control; planning tools for the integration of renewable energy sources into low and medium voltage distribution grids; simulation methods for the transient analysis of synchronous alternators; photovoltaic power plant grid integration in the romanian system–technical approaches.

185p dianmotminh00 22-04-2024 5 3   Download

Currently, in Vietnam, the management and operation of the power system face challenges and difficulties due to complex terrain conditions, natural disasters, floods, and typhoons. In addition to the power grid failures caused by natural disasters that damage the power system. The power grid failures caused by humans are serious and directly affect human life.

8p vimarillynhewson 02-01-2024 3 2   Download

In the present study, a single phase five-level Dual boost T-Cell inverter that may equal the peak amplitude of the grid voltage even when the dc-link voltage is low and varies considerably is explored. This paper proposes an enhance impedance source network (switch boost network) to improve the DC-link from a low-amplitude input source, allowing dynamic voltage gain also increased them.

9p vimichaelfaraday 28-12-2023 8 4   Download

In this paper, the control design for the grid-connected converter used as a part of the wind turbine generator is discussed. First, the three-phase T-type multilevel converter, which exhibits several advantages such as low total harmonic distortion, reduced voltage stress, and switching loss, is employed for the power stage. Second, finite control set model predictive control (FCS-MPC) is adopted to achieve a multi-objective optimization solution for the inner grid-connected current control loop.

8p vibranson 30-11-2023 5 5   Download

This paper presents an effective grid-injected power control method for a photovoltaic (PV) system using the theory of model predictive control (MPC). The system consists of two power converters including a DC/DC boost converter for maximum point point tracking (MPPT) and a DC/AC converter formed by a two-level voltage-source three-phase inverter.

10p vijeff 30-11-2023 5 4   Download

Monitoring of power transmission lines plays an important task in high voltage transmission systems. The problem of damaged insulator causes bad effects on an electrical power grid. To make sure the power grid worked properly, electrical personnel usually need to be climbed on the electric post to inspect them which consists of risk latent in occupational safety.

9p vicaptainmarvel 21-04-2023 14 4   Download

This article presents the development an auto adaptative voltage control integrated into the PV inverters. Facing the voltage sags, this control system allows the voltage at the connection point greater than an admissible voltage threshold of decoupling protection, the connection of PV system is so maintained. The models and simulations are developed in Matlab-Simulink. The obtained results are satisfied.

5p vimelindagates 18-07-2022 7 2   Download

This paper aims to apply an Adaptive Network-based Fuzzy Inference System (ANFIS) controller in a DC-link voltage regulator to decrease the power fluctuation for enhancing the performance of the grid-tie inverter for a small-scale rooftop solar Photovoltaic (PV) system.

8p visusanwojcicki 28-06-2022 9 3   Download

High Voltage Direct Current (HVDC) is worldwide recognized as one of the most effective way to transmit power. HVDC has many advantages compared to conventional HVAC power transmission, especially when integrating many renewable energy sources into the grid.

4p vistephenhawking 26-04-2022 17 2   Download

This paper presents the microgrid in terms of its structures, operation mode, optimal configuration, and other aspects are described, and the optimal configuration model, solution algorithm, and other status reviews. We also review the research direction of the planning and design method of microgrid prospects from the microgrid itself, integrated energy grid, and coordinated planning with the distribution network.

9p linyanjun_2408 21-04-2022 18 4   Download

Lecture Methods of Electric power systems analysis - Lesson 12: August 14 2003 Blackout provide students with knowledge about some electric grid risks; the real cause of most blackouts; high-impact, low-frequency events; avoidable transmission level blackouts; line outage distribution factors (LODFs); flowgates are used as proxies for other types of limits, such as voltage or stability limits;...

50p hanthienngao 15-04-2022 21 1   Download

Lecture Methods of Electric power systems analysis - Lesson 18: Synthetic electric grids, voltage stability provide students with knowledge about models of electric grids that were not created to represent any actual electric grid; the below image shows the five bus synthetic grid I used as an undergraduate; geographically-based synthetic electric grid;...

54p hanthienngao 15-04-2022 13 1   Download

Lecture Methods of Electric power systems analysis - Lesson 25: Inertia power flow, black start, electric grid visualization provide students with knowledge about in the regular power flow a single slack bus is used so total load + losses = total generation; the slack bus is characterized by having a fixed voltage magnitude and angle; inertia and governor power flows;...

62p hanthienngao 15-04-2022 23 1   Download

The paper has built a simulation model using Ansys Maxwell 3D to calcilate the transformer inrush current with a power of 250 kVA to the grid in the case of load and no load. The results of the current, voltage and inductance values of the machine which are analyzed one after another help-engineers to design, manufacture and operate, choose the appropriate plan in case the transformer is connected to the grid.

8p viplato 05-04-2022 16 1   Download

This article shows findings of researching and design a circuit of the earth- fault phase based on the absolute value of the leading phase and fault phase. The simulation results present that this designed circuit ensures fast, sensitive and reliable operation

5p vishivnadar 17-01-2022 12 0   Download

This paper presents the analysis, design, and implementation of a back-to-back converter based active voltage conditioner for low voltage (LV) distribution grids to compensate short-term voltage sags or swells. The proposed voltage regulator contains an indirect AC/DC/AC converter and uses linear control associated with the pulse width modulation technique

8p spiritedaway36 28-11-2021 9 1   Download

This paper presents a new control strategy for grid-connected Z-source inverter which is a part of the residential photovoltaics (PV) system. The control system consists of a DC control loop, which is designed based on the exact linearization method to guarantee that the DC input voltage of the ZSI quickly tracks the reference value which is given by the maximum power point tracking (MPPT) algorithm.

8p spiritedaway36 28-11-2021 8 1   Download