Aluminum plant. Load modeling for stability studies

Abstract

The "Sistema El&hico Patag6nico Intmectado (SFPI)" is an elechic system that involves the Argentina south region. This electric system is isolated fiom the other one in the north of the country. The 60% of its load is consumed by an aluminum production plant consisting of two 160 MW series of 200 electrolytic cells each one. Dynamic and transient stability studies carried out over this system, taking into Bccount present and future situations, with load and genedon grown at the aluminum plant and in the remaining system, require adequate modeling of this particular load. Tests and simulations canied out to obtain the electrolytic process load model are &scribed. Statistical behavior of the aluminum plant load variations is a n a l p 4 to estimate the spinning reserve in the system. By the way, available load shedding mechanisms at the aluminum plant, as a system control element, were tested and the results are analyzed.

Static Load Characteristic of Complex Load Node with Allowance for Automation

“…The models obtained as a result of an application of the algorithm for test data processing shows its high efficiency. Real data processing doesn't enable to 01040-p. 4 estimate accuracy of the algorithm, however, the preliminary estimate (calculation of the governing effect of load) also evidences about high accuracy of the SLC identification.…”

“…The static load characteristic by voltage is the dependence of active and reactive load power on the applied voltage in steady-state conditions Р(U), Q(U) at a constant (rated, as a rule) frequency. For most large nodes of the power system, the static load characteristic by voltage is described by a quadratic polynomial [3][4][5]:…”

Response analysis of saturable reactors and tap changer in an aluminium smelting plant

“…There are several pot lines (reduction lines), which supply different groups of electrolytic cells. The diagrammatic representation of multi-pulse rectifier system, derived from [2] and [8], is shown in Fig. 1.…”

“…The load model corresponding to an electrolytic process of a typical aluminium smelting plant has been discussed in [8]. It also elaborates the statistical load behaviour for different scenarios and reports the outcome of field tests such as disconnection of rectifier groups and automatic load reduction for deciding effective load shedding strategy.…”

Open loop response characterisation of an aluminium smelting plant for short time interval feeding

“…The transient stability studies associated with the aluminium production plant are elaborated in [10]. It also highlights the development of electrolytic process load model based on different tests and simulations.…”