Voltage Agnostic Power Reactor with Distributed Active Impedance Injection
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Solution Overview
Problem
Current high-voltage transmission line balancing systems face limitations in dynamic control, reliability, and cost-effectiveness due to reliance on passive impedance injection modules and centralized control systems, which restrict power flow efficiency and increase operational costs.
Innovation Solution
The implementation of distributed active impedance injection modules with a multi-turn primary transformer, allowing for the injection of both inductive and capacitive impedances directly on high-voltage transmission lines, utilizing standard power-electronics components and a virtual ground connection for enhanced reliability and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed active impedance injection modules are implemented, then dynamic control capability and power flow efficiency are improved, but device complexity and implementation cost increase
Solution Approach 1:
The system divides the power grid control function into spatially distributed active impedance injection modules that can be independently installed at different locations along transmission lines. Each module operates autonomously to provide local power flow control, enabling granular segmentation of the control system to improve overall productivity while managing complexity through modular design
Solution Approach 2:
The active impedance injection modules are designed with multi-functionality to handle both inductive and capacitive impedance injection, power flow control, and voltage regulation within a single device. This universal design approach allows one module type to serve multiple grid control functions, improving productivity without proportionally increasing device complexity
2Reliability
If centralized control systems with high-voltage insulation and high-current switching capabilities are used, then control reliability is improved, but system response time and operational flexibility deteriorate
Solution Approach 1:
The centralized control system is segmented into distributed active impedance injection modules that can autonomously respond to grid conditions. This segmentation enables faster local response times while maintaining reliability through decentralized operation, eliminating the time delays associated with centralized decision-making and signal transmission
Solution Approach 2:
The modules are pre-configured with control algorithms and protection schemes that enable immediate response to grid disturbances without waiting for centralized commands. This preliminary preparation of control logic allows the system to act instantly when needed, reducing response time while maintaining reliability through pre-validated control strategies
3Ease of manufacture
If passive impedance injection modules are used, then implementation cost is reduced, but dynamic control capability and adaptability are limited
Solution Approach 1:
The system transitions from static passive impedance modules to dynamic active impedance injection modules that can continuously adjust their impedance characteristics in real-time. This dynamic capability allows the modules to adapt to changing grid conditions and optimize power flow, significantly improving versatility while maintaining cost-effectiveness through efficient power electronics design
Solution Approach 2:
The active modules utilize power electronic converters to dynamically change the impedance parameters (inductive and capacitive values) based on real-time grid measurements and control objectives. This parameter variability enables flexible adaptation to different operating conditions, transforming fixed-cost passive modules into adaptive active modules without excessive cost increase
4Temperature
If substations with oil cooling and forced recirculation systems are used, then heat dissipation capability is improved, but weight and size of units increase
Solution Approach 1:
The heavy mechanical cooling systems (oil cooling, forced recirculation) are replaced with advanced power electronic cooling solutions that use solid-state heat sinks and efficient thermal management circuits. This substitution eliminates bulky mechanical components while maintaining effective heat dissipation, significantly reducing weight and size of the impedance injection modules
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
This solution provides high-reliability, cost-effective, and intelligent dynamic control of power flow, enabling efficient line balancing and phase correction, reducing power losses and enhancing the overall efficiency of the power grid.
Implementation Method 1
a multi-turn transformer primary coupled to a high voltage transmission line
Data Source
AI summary
Distributed series reactance modules and active impedance injection modules that are adapted to operating with electric power transmission lines over a wide range of transmission voltages are disclosed. Key elements include a virtual ground, an enclosure that acts as a Faraday shield, radio frequency or microwave control methods and the use of corona rings.