Fault Location in Power Distribution Grids
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for locating faults in power distribution grids are unreliable due to inconsistent fault indications, signal transmission delays, and operator distractions, leading to inefficiencies and potential errors in fault isolation.
Innovation Solution
A method that determines a fault path based on received fault indications, selects the next grid segment in the path as the fault location, and isolates it by operating switching devices, while identifying and disregarding inconsistent indications within a predetermined threshold to ensure accurate fault localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual fault location process is used, then operator experience and knowledge are utilized, but the process is time-consuming and prone to errors due to divided attention
Solution Approach 1:
The system performs automatic fault location by having the fault indication processing and path determination execute themselves without requiring continuous operator intervention. The automated system processes fault indications, determines fault paths, and identifies location hypotheses independently, freeing operators from manual analysis while maintaining high accuracy through algorithmic consistency.
Solution Approach 2:
The manual mechanical process of operator analysis is replaced with an automated electronic system that processes fault indications through defined algorithms. The system substitutes human cognitive processing with automated logic that consistently evaluates fault indications, determines paths, and generates location hypotheses without being affected by operator fatigue or divided attention.
2Productivity
If automated fault detection methods are used, then fault location speed is improved, but reliability decreases due to inconsistent fault indications from sensors
Solution Approach 1:
The system uses feedback loops to evaluate multiple fault indications and their consistency. By processing multiple indications and evaluating whether they are consistent with each other, the system can identify reliable fault locations even when individual sensor readings are inconsistent. The feedback mechanism allows the system to cross-validate indications and filter out erroneous data.
Solution Approach 2:
The system processes more fault indications than the minimum required, evaluating multiple potential fault locations and their associated indications. By examining a broader set of data than strictly necessary, the system can identify the most consistent and reliable fault location hypothesis, compensating for individual inconsistent sensor readings through the weight of corroborating evidence.
3Reliability
If multiple communication channels are used for fault indication transmission, then system reliability is improved through redundancy, but signal transmission delays and losses increase
Solution Approach 1:
The system establishes multiple communication paths in advance before faults occur. When a fault indication is received, the system can immediately route it through the most available or fastest channel without delay. The preliminary setup of multiple channels allows the system to handle transmission failures or delays by having pre-configured alternative paths ready for immediate use.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
There is described a method of locating a fault in a power distribution grid, the power distribution grid comprising at least one power source and a plurality of grid segments interconnected by switching devices, each switching device having an associated protective device capable of detecting a fault current and of transmitting a corresponding fault indication. The method comprises (a) receiving a set of fault indications from a corresponding set of protective devices, (b) determining a fault path based on the set of fault indications, the fault path comprising a set of grid segments and corresponding switching devices that form a path for the fault current flowing from the power source towards the fault, (c) selecting the next grid segment in front of the fault path as the location of the fault, and (d) isolating the fault by operating corresponding switching devices. Furthermore, a corresponding apparatus and a computer program are described.