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Zonal configuration of energy market is often a consequence of political borders. However there are a few methods developed to help with zonal delimitation in respect to some measures. This paper presents the approach aiming at reduction of the loop flow effect — an element of unscheduled flows which introduces a loss of market efficiency. In order to undertake zonal partitioning, a detailed decomposition...
Electric power systems consist of generation, transmission, and distribution components. As the demand for electricity grows seemingly endless, it is expected that a number of constraints, such as environmental, regulatory and economic, prevent the construction of new power plants and transmission lines. Finding improved ways to utilize the capacity supplied by existing power generation facilities...
A new optimal power flow (OPF) model accounts for electro-thermal coupling relationship is established based on electro-thermal coordination (ETC) concept in this paper This new OPF model organically combines the traditional OPF with heat balance equation (HBE) which reflects thermal dynamic process of transmission component. It considers the temperature limit of transmission component as its security...
Fixed demands for electricity are incorporated into a game theoretic model of strategic generators who are supplied by a fuel transportation network and produce power for a congested electricity transportation network governed by an independent system operator. Some counter-intuitive effects on measures of market power result from reducing the proportion of demands that are fixed rather than price-sensitive...
Expenses caused by energy trade have to be covered by their originators. 3rd party TSOs are entitled for compensation payment if both source and sink of each regarded power flow is situated outside the borders of its member state. Furthermore, power flows contributing to reduce tie-line utilization should be considered to lessen compensation payment. In the past, focus was on transit flows, starting...
Different concepts for the long term evolution of electricity networks have been proposed. Visions of large scale, continent-wide interconnections, local scale independent distribution network cells and networks integrating other forms of energy have emerged. The inclusion of new classes of network participants, e.g. prosumers, services providers, transportation applications, regulators and the increase...
Transmission planning demands a great effort from system planners to analyze all possible future conditions that can be expected in the operation of a power system in the midterm horizon, usually 10 years in advance. Identification of network elements changes which will be required to maintain system operation within planning criteria, is a periodical task that has to be constantly performed to reflect...
Voltage and reactive power regulation capability of Central China Power Grid is study in the paper when huge power is transmitted Southward through UHV project which will be built in near future. At first, the basic condition of UHV and problem of voltage and reactive power when huge power is transmitted Southward through UHV project are introduced and studied. Then, all voltage regulation methods...
Expenses caused by energy trade have to be covered by their originators. 3rd party TSOs are entitled for compensation payment if both source and sink of each regarded power flow is situated outside the borders of its member state. Furthermore, power flows contributing to reduce tie-line utilization should be considered to lessen compensation payment. Current methods do not match regulatory requirements...
The world power demand is continually increasing particularly in developing countries. The development of the world infrastructure resulted in a great need of energy supply for areas distant from the generation centers. As a result, the interconnection via large power corridors is happening with the use of long distance transmission lines, even interconnecting countries and trying to optimize the...
The use of fixed series compensation is well known because it provides a lot of benefits to improve the power transfer capacity in transmission lines, as well as power system stability. However, the presence of capacitors in series applied on power transmission system can result in appearance of the subsynchronous resonance phenomena. This technical paper will present the subsynchronous resonance...
This paper addresses the congestion management problem avoiding offline transmission capacity limits related to stability. These limits on line power flows are replaced by optimal power flow-related constraints that ensure an appropriate level of security, mainly targeting voltage instabilities, which are the most common source of stability problems. Results from an illustrative case study based on...
This paper presents unit commitment considering security-constrained optimal power flow (UC-SCOPF) by using Lagrangian relaxation with genetic algorithm (LRGA). The UC from LRGA is checked with optimal power flow (OPF) to ensure power transmission. Under normal operating state, UC may not satisfy system operating constraints in OPF and hence committed units must be adjusted to take into account those...
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