Smart Load Variable Delay Grid Frequency Control
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Solution Overview
Problem
Existing smart load technologies are inadequate for managing complex energy-consuming processes like battery charging and domestic appliances, as they often disconnect devices during grid stress, leading to undesirable interruptions and inefficiencies.
Innovation Solution
A smart responsive electrical load with a control arrangement that imposes a variable time delay in power consumption based on the electrical supply network's state, such as frequency or voltage, ensuring uninterrupted power delivery and accommodating complex energy processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing smart load technologies disconnect devices during grid stress, then electrical supply network stability is improved, but process continuity and device reliability deteriorate
Solution Approach 1:
The patent implements dynamic load control by continuously adjusting the loading state of the electrical device based on real-time grid frequency measurements. The system transitions from static on/off control to dynamic proportional control, where the load modulation depth and frequency are adjusted according to grid conditions, enabling the device to contribute to frequency regulation while maintaining operational continuity.
Solution Approach 2:
The system changes the operating parameters of the electrical device by modulating its power consumption based on grid frequency deviations. When frequency deviates from nominal values, the control arrangement adjusts parameters such as heating power, motor speed, or compressor capacity to provide frequency-responsive load control, thereby stabilizing the grid without complete disconnection.
2Reliability
If variable time delay is imposed before supplying electrical power, then network stability is improved, but response time and user convenience deteriorate
Solution Approach 1:
The system implements periodic measurement and adjustment cycles, where the control arrangement continuously monitors grid frequency and periodically modulates the load in response to frequency deviations. This periodic control action allows the system to respond to grid conditions in real-time without imposing fixed delays on power delivery to the electrical device.
3Device complexity
If simple on-off control is used, then device complexity is reduced, but adaptability to different grid conditions and process requirements deteriorates
Solution Approach 1:
The patent incorporates feedback control by measuring grid frequency and using this information to adjust the load on the electrical device. The control arrangement continuously monitors frequency deviations and modulates the device power consumption accordingly, creating a closed-loop system that adapts to varying grid conditions while maintaining relatively simple device architecture.
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
A smart responsive electrical load (10) is operatively connectable to an electricity supply network (20). The smart responsive electrical load (10) comprises an electrical power- consuming device (30) and a control arrangement (40) for controlling a supply of electrical power from the network (20) to the device (30). The control arrangement (60, 110, 150, 160, 170) is operable to impose a variable time delay (tp) before supplying electrical power to the device (30) after a request for power to be provided to the device (30). The variable time delay (tp) is a function of a state of the network (20), for example its frequency (f) and/or its voltage amplitude (V). Optionally, the device (30) is a battery charger, for example for use with a rechargeable electric vehicle. Beneficially, the smart responsive load (10) is supplied with electrical power from a population of micro-generation devices (500) operable to provide supply network res onse.