Power Distribution Network Control via Trend Analysis
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Solution Overview
Problem
Electrical power distribution networks with fluctuating generators like PV systems face excessive switching operations of control devices, leading to reduced device lifespan and increased maintenance costs due to unpredictable voltage fluctuations.
Innovation Solution
A processor-based control system that identifies out-of-bound conditions and trends in the power distribution network, delaying responses by a predetermined time to assess direction and only transmit control actions when the trend indicates a persistent deviation from nominal ranges, thereby reducing unnecessary switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control devices switch between operating and non-operating states to maintain voltage within nominal bounds, then voltage control is improved, but device lifespan is reduced due to excessive switching operations
Solution Approach 1:
The system performs preliminary analysis by detecting out-of-bound conditions and determining trends before executing control actions. The processor identifies when voltage or other attributes will deviate from predetermined ranges and takes control actions proactively, rather than reactively switching in response to every fluctuation. This reduces unnecessary switching operations while maintaining effective voltage control.
Solution Approach 2:
The system continuously monitors network attributes and uses feedback loops to adjust control actions. By detecting out-of-bound conditions and analyzing trends, the system receives feedback about network state and adjusts switching operations accordingly, reducing excessive switching while maintaining voltage within nominal bounds.
2Reliability
If control devices switch in steps to alter voltage within the distribution network, then voltage excursions are mitigated, but maintenance costs increase due to excessive switching operations
Solution Approach 1:
The system performs preliminary detection of out-of-bound conditions and trend analysis before executing control actions. By identifying when voltage excursions are likely to occur and taking preventive control actions, the system reduces the frequency of switching operations, thereby extending device lifespan and reducing maintenance costs while maintaining voltage stability.
Solution Approach 2:
The system uses continuous monitoring and feedback mechanisms to optimize control actions. By analyzing trends in network attributes and adjusting control decisions based on feedback, the system reduces unnecessary switching operations, lowering maintenance requirements while maintaining effective voltage control.
3Speed
If control actions are taken immediately upon detecting out-of-bound conditions, then response time is improved, but unnecessary switching operations increase due to quick fluctuations
Solution Approach 1:
The system performs preliminary detection of out-of-bound conditions followed by trend analysis before executing control actions. This two-stage approach allows the system to respond quickly to genuine problems while filtering out transient fluctuations, improving both response time for actual issues and switching efficiency by avoiding unnecessary operations.
Solution Approach 2:
The system uses feedback from trend analysis to optimize the timing and necessity of control actions. By continuously monitoring network attributes and adjusting control decisions based on detected trends, the system achieves appropriate response times while reducing unnecessary switching operations caused by quick fluctuations.
Data Source
AI summary
An electrical power system includes an electrical power distribution network and a control device configured to regulate at least one attribute of said electrical power system. The electrical power system further includes a processor coupled to the control device configured to identify an out-of-bound condition on said electrical power distribution network at a first time. The out-of-bound condition is associated with the at least one attribute. The processor is also configured to determine a trend for the at least one attribute at a second time that is later than the first time after a predetermined delay time elapses. The trend indicates a direction away from at least one of a predetermined range and a predetermined value. The processor is also configured to transmit a control action to said control device based at least in part on the trend.