DC Distribution System Ride-Through via Series Charge Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical energy distribution systems face challenges in providing 'ride-through' capability to handle fluctuations from intermittent renewable energy sources and slow-response diesel generators, requiring expensive energy storage solutions for stability in both small and large-scale power systems.
Innovation Solution
An electrical energy distribution system with a supply side delivering direct current and a delivery side featuring plural connection ports with conditioning circuitry, incorporating a series bank of charge storage devices such as capacitors and batteries to smooth energy supply and balance reactive power, charged from the supply side, load side, or auxiliary AC/DC supplies, ensuring dynamic stability and balancing reactive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expensive energy storage systems are used to provide ride-through capability for intermittent renewable energy sources, then system stability is improved, but system cost increases
Solution Approach 1:
The patent segments the energy storage function by using separate charge storage devices (capacitors and batteries) connected in series across the supply voltage, with each device contributing to ride-through capability. This segmentation allows the system to achieve stability without requiring a single large, expensive storage system, thereby reducing overall cost while maintaining reliability.
2Reliability
If large-scale energy storage systems are deployed to handle fluctuations, then ride-through capability is improved, but device complexity increases
Solution Approach 1:
The charge storage devices serve multiple functions: they provide ride-through capability during supply fluctuations, balance reactive power at the point of delivery, and can be charged from multiple sources (supply side, load side, or auxiliary AC/DC supplies). This multi-functionality reduces the need for separate dedicated systems, thereby reducing overall device complexity while improving ride-through capability.
3Productivity
If charge storage devices are used to balance reactive power, then power delivery efficiency is improved, but device complexity increases
Solution Approach 1:
The same charge storage devices that provide ride-through capability are also used to balance reactive power at the point of delivery. By charging and discharging these devices, the system can compensate for reactive power effects of transmission lines (inductive or capacitive), thereby improving power delivery efficiency without adding separate reactive power compensation equipment, thus avoiding increased device complexity.
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 provides effective 'ride-through' capability and dynamic stability to electrical distribution grids, balancing reactive power and maintaining operational voltage and frequency deviations within acceptable limits, enabling efficient energy delivery and rapid recharging of storage devices.
Implementation Method 1
A bank of charge storage devices arranged in series and connected across the supply voltage. The charge storage devices may be of any conceivable kind; the most common being capacitors and batteries.
Implementation Method 2
The charge storage devices may be of any conceivable kind; the most common being capacitors and batteries.
Data Source
AI summary
This invention concerns an electrical energy distribution system. The system incorporates ‘ride-through’ capability, comprising: a supply side for supplying energy in the form of direct current at a supply voltage, a delivery side for delivering energy, having plural connection ports for selective connection to respective electrical energy loads. Wherein each connection port includes electricity conditioning circuitry to deliver and vary electrical power supply to a load connected at the port. And further comprising a bank of charge storage devices arranged in series and connected across the supply voltage.