Power Converter Reactive Power Logging for Grid Transactions
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Solution Overview
Problem
Current power conversion systems lack the capability to efficiently manage and transact reactive power, which is anticipated to become a target in future energy transactions, requiring improved convenience and data accumulation for objective evaluation.
Innovation Solution
A power conversion apparatus and system that includes a power conversion circuit, a calculating unit to determine reactive power and current, and a storing unit to accumulate time-series reactive power information, with a communication interface to transmit this data to a server, enabling objective evaluation and convenient reactive power transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reactive power transaction capability is added to future power systems, then the ability to perform reactive power transactions is improved, but the lack of accumulated time-series data and objective evaluation methods causes inconvenience and reduced transaction efficiency
Solution Approach 1:
The patent applies preliminary action by accumulating time-series reactive power data in advance through the storing unit before transactions occur. The calculating unit continuously calculates reactive power values and stores them with timestamps, so when a transaction needs to occur, the data is already prepared and available for objective evaluation, eliminating the need for real-time data collection during transactions.
2Adaptability or versatility
If reactive power calculation and storage functions are added to the power conversion apparatus, then the capability to support reactive power transactions is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the power conversion apparatus to perform multiple functions: it continues its primary power conversion function while also calculating reactive power, storing time-series data, and supporting transactions. The calculating unit uses existing output current and voltage data from the power conversion circuit, and the storing unit stores data in a structured format that serves both operational monitoring and transaction evaluation purposes.
3Measurement precision
If time-series reactive power data is accumulated and transmitted to servers, then the objective evaluation capability is improved, but the communication data transmission requirements and system complexity increase
Solution Approach 1:
The patent applies taking out by extracting only the necessary reactive power data from the power conversion apparatus and transmitting it to external servers. The calculating unit calculates reactive power based on existing output current and voltage, and the storing unit stores this extracted data with timestamps. The communication interface transmits only the essential time-series reactive power information to servers for centralized analysis and transaction processing.
Data Source
AI summary
A power conversion system includes plural power conversion apparatuses and a server connected to each of the plural power conversion apparatuses. Each of the plural power conversion apparatuses includes a power conversion circuit interconnected with a power system, a calculating unit configured to calculate, based on an output current and an output voltage of the power conversion circuit, at least one information of reactive power and a reactive current output by the power conversion circuit, a storing unit configured to accumulate, in a storage device, time-series reactive power information which is information associating time and the at least one information calculated by the calculating unit, and a communication interface configured to transmit the time-series reactive power information stored in the storage device to the server. The server is constructed to collect the time-series reactive power information of each of the plural power conversion apparatuses via the communication interface.