Integrated Power Flow Control Across Transmission and Distribution
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Solution Overview
Problem
The existing power system control methods, such as those described in Patent Literature 1, are confined within distribution systems and do not consider the transmission system, leading to issues like voltage violations and overloads due to increased interconnection of distributed power supplies, affecting the entire power system.
Innovation Solution
A power transmission and distribution operations management apparatus that integrates transmission and distribution system data to determine control quantities for installations across both systems, using power supply and demand forecasts to enhance power quality by performing optimal power flow calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized control method is applied within distribution system, then voltage deviations are prevented within distribution system, but power quality problems like voltage violations and overloads affect the entire power system due to lack of transmission system consideration
Solution Approach 1:
The patent merges the transmission system operation management system and distribution system operation management system into a unified power system operation management system. This integration allows the system to comprehensively manage installations across both transmission and distribution systems, enabling coordinated control that prevents voltage violations and overloads throughout the entire power system rather than just within isolated distribution systems.
2Ease of operation
If transmission system and distribution systems are operated separately, then individual system control is maintained, but ability to solve power quality problems is limited
Solution Approach 1:
The patent combines separate transmission and distribution system operations into an integrated management framework. The unified system receives installation information from both transmission and distribution systems, performs comprehensive power flow calculations considering the entire power system, and generates coordinated control plans that maintain operational simplicity while significantly improving power quality management capability.
3Power
If distributed power supplies are interconnected with transmission and distribution systems, then power supply capacity is increased, but voltage violations and overloads become more obvious
Solution Approach 1:
The patent implements a feedback mechanism where the unified operation management system continuously receives installation information from both transmission and distribution systems, performs power flow calculations to assess system state, identifies voltage violations and overloads, and generates control plans to correct these issues. This closed-loop feedback approach enables the system to adapt to increased distributed power supply interconnections while maintaining voltage and current compliance throughout the power system.
Data Source
AI summary
A power transmission and distribution operations management system according to the present disclosure includes a node and branch integration unit that generates integrated installation data including both installations in a transmission system and installations in a distribution system, using transmission system installation data that are data about the installations in the transmission system and distribution system installation data that are data about the installations in the distribution system; and a power flow calculation unit that determines control quantities for the installations in the transmission system and the distribution system, using the integrated installation data, power supply and demand forecast data within the transmission system, and power supply and demand forecast data within the distribution system, for compliance with at least one of a current constraint or a voltage constraint.