Voltage disturbance

Part 2 book "Power supply devices and systems of relay protection" includes content: Lead–acid accumulator batteries; systems for supervision of substation battery continuity; backup of substation DC auxiliary power systems; insulation problems in substation dc auxiliary power supply; voltage disturbances in auxiliary power supply.

87p dianmotminh03 11-06-2024 4 1   Download

Part 2 book "Transmission and distribution electrical engineering" includes content: Power transformers, substation and overhead line foundations, overhead line routing, structures, towers and poles, overhead line conductor and technical specifications, testing and commissioning, electromagnetic compatibility, supervisory control and data acquisition, project management, distribution planning, power quality – harmonics in power systems, power quality – voltage disturbances, high voltage direct current transmission, smart grids, fundamentals.

610p dianmotminh00 22-04-2024 7 5   Download

This paper presents a method to distinguish transients arising out of isolated capacitor switching, back-toback capacitor switching, prestrike capacitor switching, restrike capacitor switching and voltage magnification.

7p vidoctorstrange 06-05-2023 4 2   Download

The proposal presents the design of a voltage con-troller for a three-phase inverter. At first, the state-space model of the inverter with uncertainties and system pa-rameters variation taken into account is constructed. The proposed controller combines a feedback component and a disturbance compensator. The first one is accomplished using LQR control law which can be approximated by reinforcement learning algorithm.

5p vistephenhawking 26-04-2022 13 2   Download

Lecture Power system stability - Lesson 18: Voltage Stability, Power System Oscillations provide students with knowledge about power system voltage stability; small disturbance voltage stability; maximum loadability when power flow jacobian is singular; relationship between stability and power flow jacobian;...

34p hanthienngao 15-04-2022 11 2   Download

For a robust voltage control of the system, controllers of proportional and integral type have been incorporated for AVR of the excitation system of the synchronous generator and SVC. The controller parameters are optimized using firefly algorithm (FA). The dynamic response of the system has been tested for different degrees of load disturbances plus variable nature of the wind system.

13p phanngocminhtam 14-09-2021 9 1   Download

In this paper, a nonlinear control scheme for dynamic voltage restorer (DVR) is proposed to reduce the voltage disturbances for loads under grid voltage sags and nonlinear loads. First, the nonlinear model of the system consisting of LC filter is obtained in the dq0 synchronous reference frame.

7p viaespa2711 31-07-2021 20 1   Download

This paper presents the change in the volt-farad characteristics of the Al/SiO2/n-Si structure irradiated with helium ions with the energy of 5 MeV in the frequencies of 1, 10, 100, and 1000 kHz. The voltage dependence of the capacitance and the frequency dependence of the dissolution angle are measured on an LCR Agilent E4980A and Agilent 4285A meter.

5p nguaconbaynhay10 20-02-2021 15 1   Download

THDv is still within the safe limit under 5%, as well as for the THDi is also still within the safe limit of tolerance of 15%. As a result of harmonic disturbances and load imbalances in the building G5 in 2018, the caused losses of power losses that need to be borne by Universitas Muhammadiyah Yogyakarta in the amount of Rp 9,210,133.09.

11p lucastanguyen 28-05-2020 10 0   Download

Voltage sags can be symmetrical or unsymmetrical depending on the causes of the sag. At the present time, one of the most common procedures for mitigating voltage sags is by the use of dynamic voltage restorers (DVRs). By definition, a DVR is a controlled voltage source inserted between the network and a sensitive load through a booster transformer injecting voltage into the network in order to correct any disturbance affecting a sensitive load voltage. In this paper, modelling of DVR for voltage correction using MatLab software is presented.

9p kequaidan1 16-11-2019 23 0   Download

4.1 Concept of Energy Transmission and Distribution 4.2 Transmission Line Structures Joe C. Pohlman George G. Karady 4.3 Insulators and Accessories George G. Karady and R.G. Farmer 4.4 Transmission Line Construction and Maintenance Wilford Caulkins and Kristine Buchholz 4.5 Insulated Power Cables for High-Voltage Applications Carlos V. Núñez-Noriega and Felimón Hernandez 4.6 Transmission Line Parameters Manuel Reta-Hernández 4.7 Sag and Tension of Conductor D.A. Douglass and Ridley Thrash 4.8 Corona and Noise Giao N. Trinh 4.

104p kien06121986 24-12-2012 91 11   Download

causing a voltage sag with duration of more than 1 cycle occurs within the area of vulnerability. However, faults outside this area will not cause the voltage to drop below 0.5 pu. The same discussion applies to the area of vulnerability for ASD loads. The less sensitive the equipment, the smaller the area of vulnerability will be (and the fewer times sags will cause the equipment to misoperate). The voltage sag performance for a given customer facility will depend on whether the customer is supplied from the transmission system or from the distribution system.

473p beobobeo 01-08-2012 82 14   Download

Power quality has become an important issue in recent times when many utilities around the world find very difficult to meet energy demands which leads to load shedding and power quality problems. This book on power quality written by experts in their fields will be of great benefit to professionals, engineers and researchers. This book comprises of 16 chapters which are arranged in two sections. Section one covers power quality monitoring, classification, and analysis aspects.

0p ktcn_1 10-07-2012 74 9   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Detection of Disturbances in Voltage Signals for Power Quality Analysis Using HOS

13p dauphong19 07-03-2012 55 4   Download