Active Filter Energy Storage for Dynamic Load Power Smoothing
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Solution Overview
Problem
Conventional power distribution systems fail to effectively manage dynamic loads, leading to significant power quality issues and equipment damage due to sudden fluctuations in current demands, which can cause wear and tear on generators and result in operational disruptions.
Innovation Solution
An active filter system that employs an energy storage device, such as a battery, connected to a power source and load, using programmable active filter controls to regulate power delivery and maintain the energy storage device within optimal state-of-charge ranges, thereby filtering load dynamics and smoothing power transients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power distribution systems directly serve dynamic loads, then the system structure remains simple, but power quality deteriorates and equipment reliability decreases due to sudden current fluctuations
Solution Approach 1:
The patent introduces an active filter system as an intermediary component between the power source and dynamic loads. This system includes a converter electrically coupled to the power source and an active filter system bus, along with an energy storage device connected to the bus. The active filter system acts as a mediator that conditions power before delivering it to dynamic loads, smoothing current fluctuations and improving power quality while protecting equipment reliability.
2Reliability
If the active filter system uses energy storage device charge and discharge to filter power, then power quality improves, but energy loss increases
Solution Approach 1:
The patent implements control circuitry that continuously monitors the state of charge of the energy storage device and adjusts the converter operation accordingly. The control system receives measurements of load current and state of charge, then dynamically controls the converter to condition power while maintaining the energy storage device within optimal state-of-charge ranges. This feedback mechanism optimizes the charge-discharge cycles to minimize energy losses while maintaining power quality.
3Reliability
If the converter conditions power to create filtered load, then power quality improves, but device complexity increases
Solution Approach 1:
The converter in the active filter system is designed to perform multiple functions: it converts power from the power source, conditions the power by smoothing fluctuations, and creates a filtered load on the active filter system bus. This multi-functional design consolidates several operations into a single device, reducing overall system complexity while maintaining power quality improvements.
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 active filter system effectively reduces power quality issues, protects equipment, and extends the lifespan of generators by smoothing power draw from the source, even under high dynamic pulse loads, maintaining high power quality and supporting the power requirements of dynamic loads.
Implementation Method 1
an energy storage device electrically coupled to the active filter system bus and configured to filter the power via charge and discharge of an energy storage device
Data Source
AI summary
An active filter system for filtering power on a power system may include a converter, an energy storage device, and control circuitry. The converter may be configured to be electrically coupled to a power source at a converter input and an active filter system bus at a converter output. The converter may be configured to deliver power to the active filter system bus that serves a dynamic load. The energy storage device may be electrically coupled to the active filter system bus and configured to filter the power via charge and discharge of an energy storage device. The control circuitry may be configured to control the converter to condition power drawn from the power source to create a filtered load based on programmable active filter controls. The programmable active filter controls may be based on a measurement of a load current being supplied to the dynamic load and a state of charge of the energy storage device.