Abstract
The possible methods to brake a wind driven induction generator electrically without the use of power electronics are experimentally and analytically investigated. What is special with this case compared to other induction machine braking situations, is the great moment of inertia and the huge driving torque which have to be taken into account. Measurements are made on a 15 kW induction machine driven by a dc-machine which represents the wind turbine and compared with calculations. The most effective methods to brake an induction machine is, in this case, a combination of capacitors with additional resistors, magnetic braking, and dc-injection which quickly brings the machine from an overrated speed to a full stop. The capacitor braking is most powerful with a single phase capacitor and an additional resistance connected in parallel. At dc-injection, it is most efficient with a short-circuit connection. The represented method of braking can not only be successfully employed at wind power stations, but also in other situations where induction machines present a safety hazard if they are allowed to race after a power failure, thus eliminating possible injury to personal or damage to materials. (28 refs., 48 figs.).
Bohman, S;
Touma, M
[1]
- Chalmers Univ. of Tech., Gothenburg (Sweden). Dept. of Electrical Machines and Power Electronics
Citation Formats
Bohman, S, and Touma, M.
Electric emergency braking of a wind-driven induction machine.
Sweden: N. p.,
1992.
Web.
Bohman, S, & Touma, M.
Electric emergency braking of a wind-driven induction machine.
Sweden.
Bohman, S, and Touma, M.
1992.
"Electric emergency braking of a wind-driven induction machine."
Sweden.
@misc{etde_10120980,
title = {Electric emergency braking of a wind-driven induction machine}
author = {Bohman, S, and Touma, M}
abstractNote = {The possible methods to brake a wind driven induction generator electrically without the use of power electronics are experimentally and analytically investigated. What is special with this case compared to other induction machine braking situations, is the great moment of inertia and the huge driving torque which have to be taken into account. Measurements are made on a 15 kW induction machine driven by a dc-machine which represents the wind turbine and compared with calculations. The most effective methods to brake an induction machine is, in this case, a combination of capacitors with additional resistors, magnetic braking, and dc-injection which quickly brings the machine from an overrated speed to a full stop. The capacitor braking is most powerful with a single phase capacitor and an additional resistance connected in parallel. At dc-injection, it is most efficient with a short-circuit connection. The represented method of braking can not only be successfully employed at wind power stations, but also in other situations where induction machines present a safety hazard if they are allowed to race after a power failure, thus eliminating possible injury to personal or damage to materials. (28 refs., 48 figs.).}
place = {Sweden}
year = {1992}
month = {Sep}
}
title = {Electric emergency braking of a wind-driven induction machine}
author = {Bohman, S, and Touma, M}
abstractNote = {The possible methods to brake a wind driven induction generator electrically without the use of power electronics are experimentally and analytically investigated. What is special with this case compared to other induction machine braking situations, is the great moment of inertia and the huge driving torque which have to be taken into account. Measurements are made on a 15 kW induction machine driven by a dc-machine which represents the wind turbine and compared with calculations. The most effective methods to brake an induction machine is, in this case, a combination of capacitors with additional resistors, magnetic braking, and dc-injection which quickly brings the machine from an overrated speed to a full stop. The capacitor braking is most powerful with a single phase capacitor and an additional resistance connected in parallel. At dc-injection, it is most efficient with a short-circuit connection. The represented method of braking can not only be successfully employed at wind power stations, but also in other situations where induction machines present a safety hazard if they are allowed to race after a power failure, thus eliminating possible injury to personal or damage to materials. (28 refs., 48 figs.).}
place = {Sweden}
year = {1992}
month = {Sep}
}