Sistema de control hidrometeorológico de itaipú v1

Itaipú Binacional Hydrometeorologic Control System
R.M. Almirón & A.P. do Nascimento & A. Garcete & J.M. Rivarola
Itaipú Binacional, Hernandarias, Paraguay

ABSTRACT: Hydrology and Meteorology are esential for hydropower generation, because water inflow to reservoirs is the main resource. An inflow forecast for the next days is absolutly necessary so the power generation could be efficent andreal time supervision directly support to obtain a maximun benefit from water resources. With this two main goals, the Itaipu Binacional has decided to develop his Hydrometeorologic Control System. 1 INTRODUCTION Itaipú Binacional is a Paraguay and Brazil enterprise created for the construction and operation of the Itaipu Hydroelectric Power dam, actually the biggest in the world with 18 turbinesreaching 12.600 Mw of installed capacity. With two newer ones, now being installed, its capacity will grow up to 14.000 Mw. The area for hydrometeorological supervision is exactly this incremental area, with an area between Itaipu and a measure station named R11 downstream from the dam, measuring together 235.000 Km2.

Figura 2 Geografic location of Itaipu Dam. Figure 1. Itaipu Hydroelectricpower dam.

Itaipú dam is located over the Paraná river, in the reach between Paraguay and Brazil, near Hernandarias (Paraguay) and Foz de Iguazú (Brazil). Its drainage area have 820.000 km2, 70 % belongs to its upper basin strongly developed with more than 30 hydrolectric power dams of the South East Brazilian Energy System and the 30 % rest, between Jupiá, Rosana and Itaipú dams, in the middlebasin, in natural condition, named as incremental basin.

The rivers Ivaí, Piquirí and Iguazú in Brazil and Acaray y Monday in Paraguay belong to this Itaipu interest area. 2 FORECAST AND SUPERVISION Is evident that a precise forecast and suitable supervision are essential for hydropower generation efficiency and benefits maximizing. The Hydrology and Energy Studies Division (OPSH.DT) isresponsible for the definition of the metodologies to be

used to forecast flows and levels and to supervise the natural events influencing the operation of the Itaipú dam.

3 HYDROMETEOROLOGIC CONTROL SYSTEM The named División is dedicated to develop of a new Hydometeorologic Control System (HCS). This new system is based in comercial softwares and other ones internally developed in Itaipu. The HCSis composed essentialy by the following modules: 3.1 Collec data System All the process begins with the collect data from hydrology stations, rivers level measure stations and meteorological stations, to obtain rainfall, level, temperature, wind and other data.

suply, transmition and central processing system. Among this systems an important one is the satellite transmition system based onORBCOMM system, with a Gateway Earth Station on Itaboraí, Brazil, where the data is received from a constalation of low earth orbite satellites and then sended by Internet to the Itaipu Central Processing Station. This system is

in normal use since 2003.
Figure 4. STH general layout.

3.1.2 Data Formatting. Data will be treated with a formatting process by a program called Conversor, that hourlytransform the original format data received from other organizations or systems to the format established for the data bases used by Itaipu.

Figure 3 Meteorological Products.

Figure 5 Data automaticaly imported.

This data are collected by remote sensors and transmited automatically by satellite communication system to a Gateway Earth Station (GES) and Internet from a Operation andControl Station (GCC) at Rio de Janeiro, Brazil. Also by Internet are collected data from other providers as SIMEPAR, DINAC, COPEL, ANA, CNOS. Itaipu had signed formal agreement with those organizations to receive data regularly from them. Other aditional data are received by telephone and radio directly connected with the stations operators. Data about meteorologic systems are collected too like...