State Of Charge Determination
First Claim
1. A method determining the state of charge (SOC) of at least one battery comprising the steps of:
- making an internal states prediction of said battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjusting said internal states prediction with measured properties of the battery, applying said adjusted internal states prediction in the making of at least one following internal state prediction, andproviding the estimated state of charge (SOC) as a function of the predicted internal states.
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Abstract
A method, device and computer program product for determining the state of charge of at least one battery as well as to a power compensator for an electric power transmission line including such a device. The device includes an internal states prediction unit and a state of charge determining unit. The internal states prediction unit makes an internal states prediction of a battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjusts the internal states prediction with measured properties of the battery and applies the adjusted internal states prediction in the making of following internal state predictions. The state of charge determining unit provides the estimated state of charge (SOC) as a function of the predicted internal states. The invention allows the provision of improved state of charge estimates.
13 Citations
25 Claims
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1. A method determining the state of charge (SOC) of at least one battery comprising the steps of:
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making an internal states prediction of said battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjusting said internal states prediction with measured properties of the battery, applying said adjusted internal states prediction in the making of at least one following internal state prediction, and providing the estimated state of charge (SOC) as a function of the predicted internal states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 25)
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12. A Device for determining the state of charge (SOC) of at least one battery comprising,
an internal states prediction unit arranged to make an internal states prediction of said battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjust said internal states prediction with measured properties of the battery, and apply said adjusted internal states prediction in the making of at least one following internal state prediction, and a state of charge determining unit arranged to provide the estimated state of charge (SOC) as a function of the predicted internal states.
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22. A power compensator for an electric power transmission line comprising:
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a voltage source converter at least one battery, and a charge control device including a battery supply decision unit and a charge determination device including an internal states prediction unit, arranged to make an internal states prediction of said battery based on a model for the battery, where each internal state is related to the charge distribution in the battery adjust said internal states prediction with measured properties of the battery, and apply said adjusted internal states prediction in the making of at least one following internal state prediction, and a state of charge determining unit arranged to provide an estimated state of charge (SOC) as a function of the predicted internal states. - View Dependent Claims (23)
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24. A computer program product for determining the state of charge (SOC) of at least one battery,
comprising computer program code to make a device for determining the state of charge of the battery perform when said code is loaded into said device: -
make an internal states prediction of said battery based on a model for the battery, where each internal state is related to the charge distribution in the battery, adjust said internal states prediction with measured properties of the battery, apply said adjusted internal states prediction in the making of at least one following internal state prediction, and provide the estimated state of charge (SOC) as a function of the predicted internal states.
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Specification