Power Management Arrangement for Dynamic Grid Export Control
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Solution Overview
Problem
Existing power management systems for households with photovoltaic inverters face challenges in dynamically adjusting power export limitations due to network restrictions, as they lack a reliable interface for communication between the electric distribution company and the inverter, leading to inefficiencies and increased costs.
Innovation Solution
A power management arrangement that includes a connection interface for a current transmitter clamp, a power meter, and a grid station or management server, allowing for the receipt and application of power limitation information to control the inverter and power meter, enabling dynamic adjustment of power export and import based on grid conditions, using smart meters and controllers for cost-effective and efficient management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a current transmitter clamp is connected to measure current at the grid connection point, then power export limitation can be implemented, but the system cannot dynamically adapt to changing grid conditions due to lack of communication interface
Solution Approach 1:
The patent introduces a communication module as an intermediary component that enables data exchange between the inverter and the grid management system. This module receives dynamic power export limitation values from the grid management system and transmits them to the inverter's control unit, thereby resolving the contradiction by providing the necessary communication interface while maintaining the existing current measurement capability.
2Productivity
If an intelligent Active Network Management system is implemented to dynamically calculate export limits, then grid management efficiency is improved, but the complexity of the communication infrastructure increases significantly
Solution Approach 1:
The communication module is designed with multi-functionality, serving both as a data reception interface for dynamic limitation values and as a configuration interface for fixed limitation values. It can operate in multiple modes depending on whether dynamic or fixed limitations are applied, thereby improving grid management efficiency without proportionally increasing system complexity.
Solution Approach 2:
The system allows dynamic change of the power export limitation parameter based on grid conditions. The communication module receives updated limitation values from the grid management system and applies them in real-time, enabling flexible adaptation to changing grid parameters without requiring complex reconfiguration of the entire system architecture.
3Adaptability or versatility
If communication ports at the household are made accessible for the electric distribution company, then dynamic power limitation communication is enabled, but security and accessibility issues arise
Solution Approach 1:
The communication module acts as a secure intermediary that mediates all communications between the inverter and the grid management system. It implements authentication mechanisms and encrypted data transmission, allowing dynamic power limitation communication while maintaining security by preventing unauthorized access to the household's communication infrastructure.
Data Source
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AI summary
The invention relates to a power management arrangement (60), in particular for a household (30), comprising a first connection interface (61) connected to or configured for being connected to a current transmitter clamp (10), a second connection interface (62) connected to or configured for being connected to a power meter (21) and/or an inverter (20) of a power system (22), a third connection interface (63) connected to or configured for being connected to a grid station (40) and/or a grid management server (50), and a power control arrangement (64), the power control arrangement (64) being configured for receiving power limitation information (45, 52) from the grid station (40) and/or the grid management server (50) via the third connection interface (63), and controlling the power meter (21) and/or the inverter (20) based on the received power limitation information (45, 52).