Power system oscillations

Part 1 book "The electric power engineering handbook - Power system stability and control" includes content: Transformer protection, the protection of synchronous generators, transmission line protection, system protection, digital relaying, use of oscillograph records to analyze system performance, systems aspects of large blackouts, ower system stability, transient stability, small signal stability and power system oscillations, voltage stability, direct stability methods, power system stability controls.

211p dianmotminh03 17-06-2024 1 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 1 book "Power system stability and control" includes content: Power system stability and control, the protection of synchronous generators; transmission line protection; system protection; digital relaying; use of oscillograph records to analyze system performance; transient stability; small signal stability and power system oscillations; voltage stability.

155p dianmotminh01 20-05-2024 3 2   Download

This research proposes the dynamic stability improvement of a large-scale power system which consists of a conventional synchronous generator (SG)-based power plant integrated with a doubly-fed induction generator (DFIG)-based wind farm by using a generalized unified power-flow controller (GUPFC). The complete dynamic mathematical equations of the studied system are established in dq-axis reference frame under three-phase balanced conditions.

8p vidoctorstrange 06-05-2023 3 2   Download

A modern power system has faced in stress condition and its operating point is close to its stability limit, while the power system is subjected to variety large oscillation. The paper designed an interactive visualization tool that enables the user to monitor the stable status of power system. The study is tested on IEEE 39-bus power system network.

8p vidoctorstrange 06-05-2023 4 2   Download

The content of this research paper presents the method to control Grid Side Converter (GSC) of a Doubly Fed Induction Generator (DFIG)-based wind turbine (WT) for improving the stability of the generator. To present the power systems, a well-known power system with three Synchronous Generators (SGs) and nine buses that is widely used in many types of research is applied.

6p vidoctorstrange 06-05-2023 2 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

Lecture Power system stability - Lesson 19: Oscillations, Modal Analysis provide students with knowledge about fictitious system oscillation; causes of power system oscillations; observing modes and damping; resonance with interarea mode; an on-line oscillation detection tool; small signal stability analysis;...

51p hanthienngao 15-04-2022 16 1   Download

In this paper, the control problem is presented to suppress the residual vibration of the rod transport system of a nuclear power plant. The transport rods are needed to transport to the target position in minimum possible time. However, the rods have been observed that oscillating at the end of maneuver.

8p viwilliamleiding 04-12-2021 22 1   Download

A novel control scheme for power converters of doubly-fed induction generator (DFIG) wind turbine system has been proposed to mitigate the current oscillations due to grid voltage unbalance. With this proposed scheme, the current controller is designed in the synchronous reference frame and composed of a proportional integral (PI) controller and a repetitive controller. Thus, the proposed controller gives better performance of the DFIG wind turbine system, compared with the existing dual PI one.

10p kequaidan8 02-11-2020 16 1   Download

The online identification of power system dominated inter-area oscillations interface based on the incremental energy function method is proposed in this paper.

13p vivalletta2711 11-01-2020 11 0   Download

With the development of power system interconnection, the low-frequency oscillation is becoming more and more prominent which may cause system separation and loss of energy to consumers. This paper presents an innovative robust control for power systems in which the operating conditions are changing continuously due to load changes. However, practical implementation of robust control can be fragile due to controller inaccuracies (tolerance of resistors used with operational amplifiers).

9p kethamoi1 17-11-2019 18 0   Download

The inter-area oscillations in large interconnected power systems often have features of beings low-frequency, lightly damped, and affecting relatively more generating units located in multiple areas. They restrict the allowable power flow on tie - lines and may lead to unexpected contingencies if it is not to be in proper observation.

10p viengland2711 23-07-2019 27 0   Download

An online auxiliary control was designed for Static Var Compensator (SVC) to improve the poorly damped oscillations in power system subjected to large disturbances. This paper presents auxiliary control based on Adaptive Neuro-Fuzzy Inference (ANFIS) control using triangular membership function.

7p visasuke2711 25-04-2019 27 1   Download

The paper is concerned with the investigation of the quasiperiodic oscillations of a nonlinear dynamic system of Liapunov type with time lag. The following results are obtained: The necessary and sufficient conditions for the existence of the quasiperiodic solution describing the oscillating processes. The approximate quasiperiodic solution in the power series.

8p chikychiky 01-11-2018 31 0   Download

The rain forest takes an immense breath and then exhales, once every four or five years, as a major global weather pattern plays out, usually heralded by El Nin˜o–Southern Oscillation. While this powerful natural cycle has occurred for many millennia, it is during the past decade that both the climate of Earth and the people living on it have had an increasing influence on the weather pattern itself, with many biological consequences. In Southeast Asia, as also in most of the Neotropics, El Nin˜o accompanies one of the most exuberant outpourings of nature’s diversity.

336p phoebe75 01-02-2013 61 11   Download

Typical features of a modern 8051: • Thirty-two input / output lines. • Internal data (RAM) memory - 256 bytes. • Up to 64 kbytes of ROM memory (usually flash) • Three 16-bit timers / counters • Nine interrupts (two external) with two priority levels. • Low-power Idle and Power-down modes. The different members of this family are suitable for everything from automotive and aerospace systems to TV “remotes”. COPYRIGHT © MICHAEL J. PONT, 2001-2006. Contains material from: Pont, M.J. (2002) “Embedded C”, Addison-Wesley. VSS P2.0 XTL1 P2.1 XTL2 P2.2 P3.7 P2.3 P3.6 P2.4 P3.5 P2.

24p vanlektmt 27-01-2011 57 6   Download

Vibration absorption has been a very attractive way of removing oscillations from structures under steady harmonic excitations. There are many common engineering applications yielding such undesired oscillations. Helicopter rotor vibration, unbalanced rotating power shafts, bridges under constant speed traffic can be counted as examples.

42p goixanh 27-09-2010 49 7   Download

Transmitter and Oscillator Systems A transmitter is an important subsystem in a wireless system. In any active wireless system, a signal will be generated and transmitted through an antenna. The signal’s generating system is called a transmitter. The specifications for a transmitter depend on the applications. For long-distance transmission, high power and low noise are important. For space or battery operating systems, high efficiency is essential. For communication systems, low noise and good stability are required....

24p vaseline 30-08-2010 108 16   Download

Modern communication systems require radio frequency and microwave signals for the wireless transmission of information. These systems employ oscillators, mixers, ®lters, and ampli®ers to generate and process various kinds of signals. The transmitter communicates with the receiver via antennas placed on each side. Electrical noise associated with the systems and the channel affects the performance. A system designer needs to know about the channel characteristics and system noise in order to estimate the required power levels....

48p vaseline 30-08-2010 105 19   Download