Centralized Voltage Controller Excluding Faulty Units
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Solution Overview
Problem
Conventional centralized voltage control systems face challenges in maintaining proper voltage across distribution systems due to issues like voltage controller limitations, failures, and communication failures, leading to prolonged voltage violations despite proper control signals being transmitted.
Innovation Solution
A centralized voltage controller connected via a communication network to multiple local voltage control units, which calculates and adjusts control amounts based on measured voltage values, determines the functionality of each voltage controller, and excludes non-functional controllers from the control process to prevent voltage violations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If centralized voltage control is implemented to achieve system-wide consistency, then voltage control accuracy is improved, but system complexity increases due to communication network requirements and coordination overhead
Solution Approach 1:
The system divides voltage control into hierarchical levels: centralized control for system-wide coordination and local voltage control units for individual controller management. This segmentation allows centralized optimization while distributing operational complexity to manageable local units.
Solution Approach 2:
A communication network acts as an intermediary between the centralized voltage controller and local voltage control units, enabling information exchange and coordinated control without requiring direct complex connections between all system components.
2Reliability
If all voltage controllers are continuously monitored and controlled, then voltage violation resolution is improved, but response time increases due to calculation and communication delays
Solution Approach 1:
The system pre-calculates optimal controlled amounts for multiple voltage controllers based on current system state, preparing control strategies in advance. When voltage violations occur, pre-prepared control actions can be quickly implemented, reducing response time while maintaining reliable violation resolution.
3Reliability
If functional status of each voltage controller is continuously verified, then control reliability is improved, but system complexity and computational burden increase
Solution Approach 1:
Local voltage control units provide feedback to the centralized controller about the operational status of their respective voltage controllers. This feedback mechanism enables continuous monitoring of controller functionality without requiring complex centralized verification of each controller, maintaining reliability while reducing monitoring complexity.
Data Source
AI summary
A centralized voltage controller connected, via a communication network, to local voltage control units controlling voltage controllers, which are connected to a distribution line of a distribution system and control voltage of the distribution line, has: a voltage distribution determination unit calculating a controlled amount for each first voltage controller to be controlled among the plurality of voltage controllers, based on a measured value of voltage at each point of the distribution line; a tap position determination unit generating a command value to be given to each local voltage control unit based on the controlled amount; and a control state determination unit determining whether each voltage controller is a second voltage controller that fails to perform control according to the command value, and setting the voltage controllers except the second voltage controller to be the first voltage controller.