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This paper presented congestion management scheme based on generation rescheduling without and with generic load model. The results obtained with constant impedance, constant current, and constant power load (ZIP model) has also been compared with the results obtained with constant power (P, Q) load at all the buses. An objective function minimizing congestion cost based on bid function is submitted...
The flexible alternating current transmission system (FACTS), a new technology based on power electronics can be used to improve controllability, stability, and power transfer capability of AC transmission systems. In this paper SSSC damps or decrease Sub Synchronous Resonance in the power system caused during fault or at disconnection of fault. PI or Fuzzy Logic Controller along with an additional...
To determine the payments for delivered electricity and the power losses arising from the supply of electricity, the amount of electricity delivered from a power station to a certain consumer (reciprocal power) should be known. This to be realized requires tracing the flow of electricity. The superposition principle can be applied. The network is represented by generator nodes and consumer nodes connected...
Salphasic (literally phase saltation) distribution assumes the creation of a standing wave pattern in the clock distribution network in such a way as to present an amplitude anti-node to the driving circuit. A characteristic of standing wave patterns is the existence of extended constant-phase regions (of a length of half-wavelength), with abrupt changes of 180 degrees at the amplitude nodes. These...
With increased power demand and the complexity of power systems, the Australian electricity market needs to undertake a series of changes and updates, including power system deregulation, allowing independent power producers (IPPs) to enter the market. One of the current systems that needs to be updated is the spot pricing system, which involves the application of slack bus independent distribution...
This work provides a new Transmission Tariff Allocation (TTA) method to be applied in systems with high renewable source penetration and in different congestion conditions of the system. The method is based on the generalization of the Equivalent Bilateral Exchange and considers an optimization technique that aims to reduce the dispersion of the tariffs, keeping the desirable locational signal of...
This paper studies the impact of introducing look-ahead dispatch on locational marginal prices in real-time electricity markets. Due to the high forecast error and inter-temporal variability of renewable resources (e.g., wind and solar), many system operators are in the process of upgrading their market clearing engine from static economic dispatch-based ones to dynamic look-ahead economic dispatch-based...
A Population Intelligent (PI) methodology called Particle Swarm Optimization has recently been applied to power system networks with the view to minimize the computational burden of Monte Carlo Simulation in the reliability domain. This paper presents a novel Multi Objective Particle Swarm optimization (MOPSO) methodology which adapts traditional binary PSO to multi objective PSO and intelligently...
It is known that in some cases, switching some transmission lines of an electric power system off may improve the optimal economic dispatch cost. This modification of the economic dispatch problem is known as optimal transmission line switching. Unfortunately, the modified problem involves binary decision variables which make the problem difficult to solve for large-scale power systems. This paper...
In this paper, we design a distributed dynamic feedback controller that implements real-time economic optimization in power networks with tree topology. We consider the coupling between the dynamics of the power network and the appropriately formulated optimization problem in the real-time market, i.e., when the time-scale separation between markets and network dynamics fades. The design methodology...
A single-ended-style current-mode circuit with quaternary current signaling is proposed for an energy-efficient asynchronous communication link. The use of quaternary-encoded current signaling and dynamic current-feedback mechanism makes information density twice per wire because of small signal-voltage swing with maintaining high-speed switching capability, which resulting in energy-efficient asynchronous...
In order to create a model of the German Transmission Grid, it is necessary to get information of the length of the transmission lines. In Germany this data is not provided by the transmission system operators. So a different way of generating these informations has to be found. With the freeware tool Google Earth it is possible to identify the tracks of the transmission lines. In combination with...
These Active load and loss allocation has become a concern in power system with the introduction of deregulation. Deregulation often gives opportunity for the end user to choose their own supplier which has brought the importance of active load and loss allocation in transmission line. Thus, this paper proposed a Cuckoo Search technique as a tool to allocate both active load and losses in transmission...
Single pole switching operation where only the faulted phase of a three phase power is opened will enable the two energized phases to continue carrying power during the period of interruption. This is crucial especially for 500 kV transmission lines to maintain the stability of the power grid. However, single pole switching operation also introduces a significant risk for nearby turbine generators...
In this paper, we propose a distributed algorithm to solve the Security Constrained Optimal Power Flow (SC-OPF) Problem. We consider a network of devices, each with its own dynamic constraints and objective, subject to reliability constraints across multiple scenarios. Each scenario corresponds to the failure or degradation of a set of devices and has an associated probability of occurrence. The network...
In post deregulated era of power system, congestion in transmission line is more frequent. The line is said to be congested or overloaded when driven close or beyond its operating limits. It may happen that line of particular path gets overloaded due to low cost offered by generating units of that area. Appropriate Congestion Management (CM) strategy needs to be adopted to relieve line congestion...
Information on the selection and application considerations for the unit power transformer and unit auxiliaries power transformer is provided in this guide. Consideration is given to connections that include direct connection and connections through generator circuit breakers and load-break switches. The considerations referred to in this guide apply to hydroelectric and thermal electric generating...
A new formulation is presented for the efficient harmonic-balance analysis of the division bandwidth of frequency dividers by a high order. The procedure is based on some mathematical properties of the solution curve under low-amplitude of the input generator. Through a simple fitting technique, it is possible to determine the variation of the synchronization bandwidth versus any design parameter,...
Communication technology serves important functions in the power system energy management system (EMS). Recent studies found that cyber-attack and terrorist attack can cause failure of power system communication which affects EMS in various ways. This paper analyzes two impacts of communication failure on EMS, namely, system observability and system control. The first impact on system observability...
Power systems are on the cusp of a rapid technological, economic and environmental evolution. Classical problems must naturally adapt to new requirements taking into account enormous growth in the number of distributed generation plants. Physical and computational constraints within the new landscape must be revisited. In this paper, we focus on the generator scheduling problem in smart grid incorporating...
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