Voltage Regulation Control System Using Rate of Change Metrics
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Solution Overview
Problem
Voltage regulation systems in electrical power distribution networks face frequent operations due to variations in electricity generated by distributed energy resources, leading to premature wear and replacement, necessitating a control system that optimizes voltage regulation by considering the time rate of change of voltage rather than just its value.
Innovation Solution
A control system for voltage regulation devices that determines the time rate of change of voltage and adjusts operating parameters such as time delay and counter values based on this metric, optimizing the timing and frequency of voltage regulation operations to maintain voltage within a range while minimizing system stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage regulation operations are performed frequently to maintain voltage within range due to variations from distributed energy resources, then voltage stability is improved, but system wear increases and lifespan decreases
Solution Approach 1:
The control system dynamically adjusts the time delay parameter based on the rate of change of voltage. When voltage changes rapidly, the time delay is reduced to respond quickly. When voltage is stable or changing slowly, the time delay is increased to reduce operations. This dynamic adjustment optimizes both voltage stability and system lifespan by adapting the regulation frequency to actual conditions.
Solution Approach 2:
The patent changes the time delay parameter based on the voltage rate of change metric. By calculating how quickly voltage is changing and adjusting the time delay accordingly, the system performs regulation operations only when necessary, reducing unnecessary wear while maintaining voltage within acceptable ranges.
2Duration of action of stationary object
If voltage regulation operations are delayed to extend system lifespan, then system wear is reduced, but voltage stability may deteriorate
Solution Approach 1:
The system uses dynamic time delay adjustment based on voltage rate of change. When voltage is stable, longer delays reduce wear. When voltage changes rapidly, shorter delays maintain stability. This dynamic approach resolves the contradiction by adapting the delay to real-time conditions.
Solution Approach 2:
The control system continuously monitors voltage and calculates its rate of change, using this feedback to adjust the time delay parameter. This closed-loop feedback ensures that voltage stability is maintained while minimizing unnecessary operations that would wear the system.
3Ease of operation
If fixed time delay is used for voltage regulation, then control simplicity is maintained, but inability to adapt to varying voltage conditions increases system stress
Solution Approach 1:
The system transitions from fixed to dynamic time delay based on voltage rate of change. This adds adaptability without significantly complicating the control logic, as the adjustment is based on a straightforward calculation of voltage change over time.
Solution Approach 2:
The time delay parameter is changed based on the calculated rate of voltage change. This allows the system to adapt to varying conditions, reducing stress during stable periods while responding appropriately during rapid changes, without requiring complex control algorithms.
Data Source
AI summary
A system for an electrical power distribution network receives electricity from one or more distributed energy resources. The system includes a voltage regulation device configured to maintain a voltage in the electrical power distribution network within a range of voltages, the voltage regulation device including a voltage sampling module configured to obtain an indication of a voltage in the electrical power distribution network; and a control system coupled to the voltage regulation device, the control system configured to: determine a metric related to a time rate of change of the voltage in the power distribution network based on at least two samples of the voltage in the electrical power distribution network obtained at different times; and change at least one operating parameter and/or an operating mode of the voltage regulation device based on the determined rate of change of the voltage.