Abstract
AbstractWind energy has become increasingly important in the total electrical energy supply mix in Vietnam over the last few years. Small, kW turbines were installed in isolated areas a decade ago, while wind farms of several MW to few hundred MW are now being connected directly to national grid, with many additional projects in planning or under construction to fulfill an objective of 6% of the total installed capacity by 2030 (approximately 6200 MW of wind energy component). The increase in wind farm generation results in increased damage from lightning. In this paper, the annual frequency of lightning strikes to wind turbines in Vietnam is calculated using electrogeometric model. Reported lightning incidents to three major wind farms in Vietnam are summarized. Possible causes of failure are discussed, and an EMTP simulation for each incident was performed accordingly. The simulations suggest the failure mechanisms as well the potential of improved grounding to reduce lightning induced damage in future ...
Highlights
With its 3000 km of coast line, Vietnam is estimated to have a potential for over 500 GW of wind power, which is much greater than other countries in Southeast Asia
By 2016, about 50 wind farm projects have been approved but only 3 projects have been completed with a total of 79 wind turbines with a capacity of 105 MW
This paper deals with present practice for lightning protection in wind turbines in Vietnam, causes of lightning-induced damage and challenges in long-term operation of windfarms in Vietnam
Summary
With its 3000 km of coast line, Vietnam is estimated to have a potential for over 500 GW of wind power, which is much greater than other countries in Southeast Asia. The smallest windfarm is Phu Quy, with 3 turbines (Figure 4), which is connected directly to the 22 kV distribution line of the island via a step-up transformer (0.69/22 kV) placed in the nacelle of the turbine. In the two other wind farms, the boost transformers (0.69/ 22 kV) are placed at the bottom of tower and are connected to the national grid at 110 kV substations nearby.
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