Adaptive regulation schemes for wide-area asset overload protection
AssigneeSchweitzer Engineering Laboratories, Inc.
InventorsHemanth Kumar Vemprala, Bharath Nayak, Pradeep Varma Sangaraju
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Abstract
A protection system for managing overloads in a power transmission network may, for example, include various subsystems to monitor assets, identify overloads, and implement an adaptive regulation scheme (ARS). The ARS scheme includes a hybrid remedial action scheme with a high-speed first protection zone for immediate remedial actions to lower overloads below a transition threshold and a slower, iterative second protection zone that applies remedial actions based on a response-time overload curve to reduce overloads below an operational threshold. The system dynamically prioritizes remedial actions based on real-time conditions and asset dependencies.
Claims20
A protection system, comprising:
- a monitoring subsystem to monitor each of a plurality of assets in a power transmission system;
- an overload identification subsystem to identify one of the plurality of assets as an overloaded asset based on an overload percentage of the overloaded asset;
- an adaptive regulation scheme (ARS) subsystem to determine closed-loop remedial actions to reduce the overload percentage of the overloaded asset according to a hybrid remedial action scheme with:
- a high-speed, first protection zone to determine at least one immediate remedial action to reduce the overload percentage of the overloaded asset below a transition threshold, and
- a slower, iterative second protection zone to determine a series of iterative remedial actions according to a response-time overload curve to reduce the overload percentage of the overloaded asset below an operational threshold;
- and
- a controller to implement the remedial actions determined by the first and second protection zones of the hybrid remedial action scheme of the ARS subsystem.
A method of adaptive overload mitigation in a power transmission system using a hybrid multizone remedial action system, comprising:
- monitoring real-time data of each of a plurality of assets in a power transmission system to determine an overload percentage of each asset;
- calculating runback factors for at least some of the assets based on a system load flow analysis, wherein the runback factors quantify a relationship between the overload percentage and remedial runback actions of each respective asset;
- identifying one of the assets as an overloaded asset based on the determined overload percentage;
- and
- implementing an adaptive regulation scheme (ARS) to reduce the overload percentage of the overloaded asset by:
- operating within a high-speed, first zone of protection, to implement an immediate remedial action to reduce the overload percentage of the overloaded asset below a transition threshold, and
- operating within a slower, iterative second zone of protection to implement a series of remedial actions according to a response-time overload curve to reduce the overload percentage of the overloaded asset to be less than an operational threshold.
A protection system, comprising:
- a contingency planning subsystem to identify potential contingency scenarios involving a plurality of assets in a power transmission system, each contingency scenario associated with a response strategy that includes a plurality of possible remedial actions;
- a prioritization subsystem to dynamically adjust a prioritized sequence of the remedial actions for each contingency scenario based on dependencies among the plurality of assets and real-time monitored operational conditions;
- and
- an adaptive regulation scheme (ARS) subsystem to execute the response strategy of an identified contingency scenario in the power transmission system, wherein the response strategy includes implementation of a hybrid remedial action scheme having:
- a high-speed, first protection zone to implement at least one immediate remedial action to reduce an overload percentage of an overloaded asset below a transition threshold, and
- a slower, iterative second protection zone to implement a series of iterative remedial actions according to a response-time overload curve to reduce the overload percentage of the overloaded asset below an operational threshold.
Dependencies are inferred from the claim text.