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World Energy Outlook 2006

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Reserve margins vary widely across the United States. They are tight in some<br />

areas, notably in California and Texas. Gas-fired generation makes up a<br />

significant proportion of total US capacity so that electricity supply can be<br />

tight when gas supply is tight, particularly in periods of cold weather because<br />

of competing demand for gas for heating. Investment in transmission<br />

networks, which was at historically low levels in the late 1990s, has been<br />

increasing recently. However, some parts of the network may approach their<br />

operational limits as demand increases (NERC, 2005).<br />

In Japan, investment in both power generation and network infrastructure has<br />

been declining in recent years (Figure 6.14). The intention is to hold reserve<br />

margins stable at around 10% after 2010. About 16.5 GW of generating<br />

capacity is now under construction, mainly gas-fired, coal-fired and nuclear<br />

power plants. A total of 28 GW is planned for the period to 2015.<br />

billion yen<br />

2 000<br />

1 600<br />

1 200<br />

800<br />

400<br />

0<br />

Figure 6.14: Japan Power-Sector Investment, 1998 to 2003<br />

1998 1999 2000 2001 2002 2003<br />

Generation<br />

Transmission<br />

Distribution<br />

Note: Expansion investment only. Figures do not include investment in transformation and supply.<br />

Source: FEPC (2005).<br />

Investment Trends in Developing Countries<br />

Trends in Private Investment<br />

In the 1990s, many developing countries initiated electricity-sector reforms<br />

aimed at attracting private investment. Total private-sector investment in<br />

electricity between 1990 and 2004 in these countries amounted to $276 billion<br />

Chapter 6 - Power Sector <strong>Outlook</strong> 153<br />

© OECD/IEA, 2007<br />

6

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