Power System Control Instruction Device for Voltage Stability
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Solution Overview
Problem
In power systems with diverse loads and distributed power sources, existing control methods struggle to maintain voltage within an appropriate range due to unreliable communication environments and complex configurations, leading to voltage deviations.
Innovation Solution
A power system control instruction device that calculates a centralized control amount and creates a distributed control model using sensor measurements, re-creating the model when voltage deviations occur to ensure accurate voltage control across the system, regardless of communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If centralized control is used with stable high-speed communication, then voltage control precision is improved, but system reliability deteriorates when communication environment is unstable
Solution Approach 1:
The control system is segmented into centralized control amount calculation units and distributed control model creation units. The centralized unit calculates control amounts based on system-wide information, while distributed units create local control models using sensor measurements and transmitted control amounts. This segmentation allows the system to maintain voltage control precision through centralized coordination while ensuring reliability through local autonomous control capability that operates independently of communication quality.
Solution Approach 2:
A distributed control model acts as an intermediary between centralized control instructions and local control device execution. The model creation unit generates control models using sensor measurements and centralized control amounts, then transmits these models to control devices. This intermediary enables voltage control precision to be maintained through centralized guidance while allowing local execution to proceed reliably even when direct communication between centralized controller and control devices is unstable or delayed.
2Reliability
If autonomous distributed control is used without communication, then system reliability is improved, but voltage control precision deteriorates due to inability to grasp entire system state
Solution Approach 1:
The system merges centralized control amount calculation with distributed control model creation. The centralized control amount calculation unit provides system-wide control directives, while the distributed control model creation unit combines these with local sensor measurements to create executable control models. This merging enables the system to achieve voltage control precision comparable to centralized control while maintaining the reliability benefits of distributed autonomous operation, as the control model integrates both global objectives and local conditions.
3Device complexity
If control devices operate independently, then device complexity is reduced, but voltage control precision deteriorates when multiple control devices are present
Solution Approach 1:
The control instruction device is designed with multi-functionality, serving both as a centralized control amount calculator and as a distributed control model creation unit. This universal device can operate in different modes: calculating centralized control amounts when communication is stable, and creating distributed control models when communication is unstable. This multi-functionality allows the system to maintain voltage control precision across varying conditions without requiring multiple specialized devices, thus avoiding increased device complexity.
Data Source
AI summary
A power system control instruction device performing a control instruction to the control device that controls the power system on the basis of a measured value transmitted from a sensor measuring a state value of the power system and a method for performing such a control instruction are provided. The device obtains a centralized control amount using a measured value of the sensor such that a system voltage meets a predetermined control purpose, and creates a distributed control model using the measured value and the centralized control amount. The device then determines whether or not a voltage deviation from the voltage appropriate range occurs when the control device performs control on the basis of the distributed control model, and re-creates the distributed control model when the voltage deviation occurs, and transmits the distributed control model that is re-created to the control device.