Power Line Reactance Module for Dynamic Flow Control
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Solution Overview
Problem
Current power transmission systems face challenges in active power flow control, leading to transmission line congestion, fault protection coordination issues, poor asset utilization, and increased complexity due to the need for high-bandwidth communication infrastructure.
Innovation Solution
A reactance module array system mounted on power lines, with a controller that adjusts reactance modules between two modes to control power flow, using a data structure to associate system conditions with modal configurations for each reactance module, allowing for dynamic power flow management and fault protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high-bandwidth communication infrastructure is used for power flow control, then power flow control capability is improved, but system complexity and cost increase
Solution Approach 1:
The reactance module autonomously controls power flow by locally sensing system conditions (voltage, current, power flow) and adjusting its own reactance state without requiring external communication commands. The module self-regulates by comparing measured parameters against predefined thresholds and switching states accordingly, eliminating the need for complex communication infrastructure.
Solution Approach 2:
The communication function is extracted and removed from the power flow control system. Instead of relying on external communication networks to transmit control signals, the control logic is embedded directly within the reactance module itself, allowing it to operate independently based on local measurements.
2Adaptability or versatility
If reactive power compensation devices are added to control power flow, then power flow control is improved, but transmission line congestion increases
Solution Approach 1:
The reactance module dynamically changes the reactance parameter (X) of the transmission line by switching between different inductor configurations. By adjusting the reactance value rather than adding reactive power compensation, the system controls power flow according to the equation P = V²/X, where changing X directly affects active power flow without introducing additional reactive power that would cause congestion.
3Measurement precision
If multiple reactance modules are used to control power flow, then power flow control precision is improved, but device complexity increases
Solution Approach 1:
The transmission line is divided into multiple segments, each equipped with an independent reactance module that operates autonomously. Each module senses local conditions and adjusts its reactance independently, providing precise localized control. The segmentation allows distributed control without requiring complex coordination between modules, as each unit makes decisions based on local measurements.
4Adaptability or versatility
If traditional power flow control methods are used, then power flow control is achieved, but fault protection coordination problems occur
Solution Approach 1:
Each reactance module continuously measures local electrical parameters (voltage, current, power flow direction) and uses this feedback to determine its operating state. The module switches between high-reactance and low-reactance states based on feedback from local sensors, ensuring that control actions are coordinated with actual system conditions and fault states, thereby maintaining protection coordination.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enhances power flow control, reduces congestion, improves asset utilization, and simplifies operations by enabling intelligent, adaptive control of reactance in power transmission systems.
Implementation Method 1
A reactance module may include an inductor and a bypass switch
Data Source
AI summary
The disclosure is generally directed to reactance modules or DSRs (30) that may be mounted on a power transmission line (16) of a power transmission system (400). A DSR (30) may be configured in a bypass mode or in an injection mode (where reactance is injected into the corresponding line (16)). Multiple DSRs (30) installed on a power line section (18) define an array (410) and have a dedicated controller (440). Such an array (410) and controller (440) may be installed on a number of different power line sections (18). The controller (440) for each array (410) may communicate with a DSR server (420), which in turn may communicate with a utility-side control system (430). Each DSR (30) may incorporate one or more features directed to core (50) configurations and assembly, communications, modal configuration control, fault protection, EMI shielding, DSR (30) assembly, and DSR (30) installation.