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General recommendations for measuring voltage transients in dry-type distribution and power transformers are provided. Recurrent surge voltage generator circuitry, instrumentation, test sample, test point location, mounting the test coil, conducting the test, and reporting results are covered.
For power system operation, transient stability analysis is indispensable. Of late, electric power systems have become more complicated; thus, fast transient stability analyses are critical for online computations. In this paper, we apply the Taylor series expansion to a time domain equal-area criterion applicable to multimachine systems and propose a fast transient stability analysis method that...
This paper deals with voltage collapse proximity and dynamic stability of a power system following the occurrence of a contingency. The dynamic and static characteristics of the power system are incorporated into a multi-objective model in order to preserve power system security from the voltage and transient stability viewpoint. The optimization problem has been solved by the ε-constraint method...
This paper presents novel of power system stabilizer in which intend to investigate and observe the oscillation due to disturbances then define power angle difference on South Sulawesi grid. The symmetrical three phase fault and single phase fault to ground have been implemented and results show that the 150 kV of South Sulawesi grid tend to reach the limit of transient stability and then subject...
Cibatu34-Mandirancan is one of the most important subsystem in Jawa Bali system. Peak Load of this subsystem is about 1.700 MW, several industrial costumers are also located here. On 13th March 2014 disturbance occured on Indramayu-Kosambibaru. This disturbance was followed by tripping of two transmission lines and all generators in Indramayu Power Plant. Disturbance Fault Recorder (DFR) data showed...
This paper presents the design and implementation of a robust drive train torque control for rotor inertia emulation in a dynamometer test bench application. The controller is part of a hardware-in-the-loop (HiL) framework for a 50 kW small test rig that enables a real-time interaction between test rig drive train and a rotor model. The control objective is to compensate undesired dynamics of the...
An open-loop and closed-loop operating boost-power-stage converter with relatively low damping factor exhibit resonant behavior in transient conditions. Such an undamped transient characteristic introduces overshoot to the control-to-output-variable transfer function, which is also visible in the inductor current transient behavior. Therefore, due to the either too large duty ratio or voltage-reference...
The value of sub-transient reactance depends on the design of damper winding or amortissuer. All synchronous generators have sub-transient reactants even though it does not have damper winding physically. The damper winding can contribute to reduce the sub-transient current when generator in fault condition. The generator quantitative parameters are used to perform the simulation using MATLAB/Simulink...
Transient stability analysis is an indispensible part of utility system planning. At present, it still relies on the classical numerical integration methods which are accurate but time consuming for large power systems. This paper proposes Gear's method and the block method to reduce the computational cost. These methods are used to simulate the IEEE 39 Bus system. The classical model representation...
Vacuum as switching medium has been established widely in the distribution systems for more than 30 years. Well known for its outstanding and reliable interrupting capability of fault and load currents of all possible nature, the vacuum switching technology is now dominating the medium voltage level up to 52 kV. Technical advancements in the field of vacuum physics in last decades made it possible...
In this paper groups of coherent generators are identified based on a correlation metric. The main contribution is related to the rapid, simple, and reliable identification of coherent generators, which may be aggregated in order to constitute equivalent generators, thus reducing the dimensionality of the original model. Different levels of aggregation may be attained and results demonstrate the proposal's...
Conventional approach of power system transient stability analysis use time-domain simulation and detailed system information. Recent efforts on non-uniform Kuramoto oscillators and basin stability have revealed new ways to address stability problems on power systems. In this paper, we introduce a method that can quantify how likely a generator remains synchronized after a disturbance. We show that...
The objective of this work is to evaluate performance of three phasor estimation algorithms proposed in literature, under electrical system signals. Signals obtained from electrical systems response to disturbances in which the electrical system is stable or operates in a condition of transient instability, frequency or voltage. The performance during the transient state of the system is evaluated...
The US Navy is presently developing a number of new advanced electrical loads for deployment upon future vessels. Many of these loads will require high power supplied in a transient manner for successful operation. The transient nature brings about unique challenges to the shipboard power system that have not been previously faced. Traditional power generation sources alone, such as diesel and gas...
When the variable speed wind turbines with virtual inertia are connected to the grid, the transient stability control of the interconnected system will be more flexible. Firstly, the linearized state equation of equivalent two-machine system with wind power was derived, and respective influences of terminal unit inertial changes on the transient stability of power system were analyzed. Secondly, a...
This paper presents the influence of non-conventional sources like central station solar photovoltaic model and wind plant model in multi-machine power system for transient stability. Modified four-generator system is studied by replacing one of the conventional synchronous generators with solar photovoltaic and wind generator model. The performance is compared with the classical four-generator system...
The present study determines the optimum value of series compensation to improve the transient stability of a multi-machine power system using both dynamic fuzzy Q-learning(DFQL) controller and particle swarm optimization(PSO) based bang-bang controller. The DFQL based controller are suitable for continuous control and the bang-bang controller for discrete controller. The series compensation from...
Power generation in a PV system is defined by its V-I, and V-P characteristics. These curves are function of instantaneous solar irradiation and cell temperature; and outline the maximum power that the system can supply at any given moment. As a consequence of this PV systems lack overload capacity, which is common in traditional rotating generators; and therefore, PV systems cannot supply short term...
Corrective control actions for Transient Stability Improvement (TSI) could offer a solution to possible problems arising in modern stressed power networks operating under higher level of uncertainty. A comparative analysis of the most widely used corrective TSI methods is presented in this paper. The impact of the different Corrective Measures (CMs) on transient stability is investigated for different...
This paper presents some experiences concerning the testing of generating units response to frequency transient. The tests have been performed both for modeling and monitoring the compliance of the settings of the generating units with the operational requirements. A test methodology, based on mathematical modeling, is developed and proposed. The approach is intended to interfere (or disturb) less...
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