Interface Unit for Dynamic Phase Coupling in Monophase Systems
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Solution Overview
Problem
Existing systems fail to effectively balance load between phases in a multiphase electrical network when coupled with a monophase decentralized energy source, leading to inefficient energy utilization and potential harm to the distribution grid.
Innovation Solution
An interface unit is introduced to selectively couple a monophase power source to any phase of a multiphase network based on loading states, using monitoring equipment to optimize energy distribution and reduce feed-in to the distribution grid, with features like current transducers and data analysis for predictive control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a monophase inverter system is used to couple decentralized energy source to the network, then the system complexity is reduced and ease of manufacture is improved, but the load balance between phases deteriorates and energy utilization efficiency worsens
Solution Approach 1:
The system dynamically switches the connection phase of the monophase inverter based on real-time monitoring of phase load conditions. The controller continuously evaluates the load balance and reconfigures the inverter connection from one phase to another phase as needed, making the system adaptive rather than static. This dynamic phase switching enables the monophase system to contribute to load balancing while maintaining manufacturing simplicity.
Solution Approach 2:
An interface unit is introduced as an intermediary between the monophase inverter and the multiphase network. This interface unit includes phase switching components and control logic that mediate the connection, allowing the simple monophase inverter to interact intelligently with the multiphase network. The interface unit handles the complexity of phase management while the inverter itself remains simple and easy to manufacture.
2Use of energy by moving object
If excess energy is fed into the distribution grid, then the decentralized energy source can be fully utilized, but the load unbalance between phases in the distribution grid worsens and harm to the grid increases
Solution Approach 1:
The system implements continuous feedback monitoring of phase load conditions in both the internal network and the distribution grid. The controller uses this feedback information to make real-time decisions about whether to feed energy into the grid or redirect it to local loads. This feedback mechanism prevents harmful feed-in by continuously adjusting the energy flow based on actual grid conditions and local demand.
Solution Approach 2:
The system performs preliminary assessment of grid conditions and local load capacity before allowing energy feed-in. By monitoring phase loads in advance and predicting potential unbalance issues, the system prevents harmful feed-in occurrences rather than reacting after damage has occurred. The controller proactively manages energy flow to avoid creating load unbalance problems in the distribution grid.
3Ease of operation
If the monophase power source is coupled to a fixed phase, then the system operation is simplified, but the load balance between phases deteriorates and energy waste increases
Solution Approach 1:
The system transitions from a fixed phase connection to a dynamic phase switching arrangement. The controller automatically adjusts which phase the monophase inverter connects to, based on real-time load conditions. This dynamic operation maintains ease of use while preventing energy waste through intelligent phase selection that optimizes load balance.
Solution Approach 2:
The system performs self-optimization by automatically monitoring its own operational state and making independent decisions about phase connection. The controller evaluates load conditions and autonomously switches phases without requiring external intervention, enabling the system to serve itself in optimizing energy utilization while maintaining simple operation for the end user.
Data Source
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AI summary
The invention relates to decentralized energy production. In particular, the invention concerns a system for coupling a monophase power source (25,26) to an internal multiphase power network (25A,25B,25C) of a household, company, or other property. The internal network is further connected to an external power distribution grid (L1,L2,L3). The system comprises an interface unit (22) comprising a first connection point (22A) for said monophase power source and a second connection point (28A,28B,28C) for said multiphase power network, the interface unit allowing for monophase power from the monophase power source to be fed to the multiphase network, and means (23A,23B,23C) functionally connected to the interface unit for monitoring the loading states of individual phases of the multiphase power network. The interface (22) has coupling means (27) to couple monophase power to selectively one of the phases of the multiphase power network based on the loading states of the individual phases of the multiphase power network. The invention improves cost-efficient usage of locally produced power and saves transmission losses.