System and method for reinjection of retard energy in a trolley-based electric mining haul truck
First Claim
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1. A method for reinjecting retard energy regenerated from an electrical motor on a mining haul truck, the method comprising the steps of:
- operably coupling the mining haul truck to trolley lines before the mining haul truck travels downhill; and
transmitting via the trolley lines at least a portion of the retard energy regenerated during at least one retard interval to a bidirectional electric substation, wherein the at least one retard interval occurs while the mining haul truck is travelling downhill.
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Abstract
Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.
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Citations
18 Claims
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1. A method for reinjecting retard energy regenerated from an electrical motor on a mining haul truck, the method comprising the steps of:
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operably coupling the mining haul truck to trolley lines before the mining haul truck travels downhill; and transmitting via the trolley lines at least a portion of the retard energy regenerated during at least one retard interval to a bidirectional electric substation, wherein the at least one retard interval occurs while the mining haul truck is travelling downhill. - View Dependent Claims (2, 3, 4, 5)
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6. A method for storing retard energy regenerated from an electrical motor on a vehicle, the method comprising the steps of:
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determining whether an on-board electrical energy storage system is fully charged; upon determining that the on-board electrical energy storage system is not fully charged; transmitting at least a portion of the retard energy to the on-board electrical energy storage system; and charging the on-board electrical energy storage system with at least a portion of the retard energy; and upon determining that the on-board electrical energy storage system is fully charged; transmitting via trolley lines at least a portion of the retard energy to an auxiliary electrical energy storage system; and charging the auxiliary electrical energy storage system with at least a portion of the retard energy. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification