Distributed Energy Power Control via Grid Contraction
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Solution Overview
Problem
Existing voltage reactive power control systems do not efficiently calculate the power control amount for distributed energy resources, leading to increased calculation load and time due to the need to consider the entire power transmission-distribution system.
Innovation Solution
A power control system that includes a control power amount range collection unit, a power distribution system contraction unit, a contraction power amount calculation unit, and a power control amount calculation unit, which contracts the power distribution system to function as a contraction power distribution system, allowing for efficient calculation of the power control amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the power control amount is calculated by considering the whole power transmission-distribution system, then the calculation accuracy is improved, but the calculation load and time increase
Solution Approach 1:
The power distribution system is segmented into multiple contraction units, each responsible for a specific region or component. This allows the overall calculation to be divided into smaller sub-calculations that can be performed independently and in parallel, reducing the total calculation time while maintaining accuracy through coordinated optimization across all segments.
Solution Approach 2:
The system performs preliminary contraction of the power distribution system before the main power control amount calculation. By pre-processing the system model into a contracted form, the calculation complexity is reduced in advance, enabling faster subsequent calculations without sacrificing the accuracy that would result from considering the complete system.
2Productivity
If the power distribution system is contracted to reduce calculation load, then the calculation efficiency is improved, but the system complexity increases
Solution Approach 1:
A contraction unit is introduced as an intermediary component that bridges the detailed power distribution system and the simplified calculation model. This intermediary performs the complex contraction transformations automatically, shielding the user from the underlying complexity while enabling efficient calculations through the simplified model.
Solution Approach 2:
The system creates a contracted copy of the power distribution system that preserves the essential electrical characteristics and optimization properties of the original system. This copied model is computationally simpler and can be used for rapid calculations, while the full system model remains available for verification and detailed analysis when needed.
Data Source
AI summary
Voltage in a power transmission-distribution system is managed by calculating a power control amount of a distributed energy resource in consideration of the whole power transmission-distribution system. A power control system includes: a power distribution system contraction unit contracting the power distribution system including the distributed energy resource in a point of a power transmission system using control power amount range, and calculating a contraction control power amount range; a contraction power amount calculation unit calculating a contraction power amount to satisfy the contraction control power amount range based on a power transmission system evaluation value; a power control amount calculation unit calculating a power control amount controlled by the distributed energy resource based on the contraction power amount and a power distribution system evaluation value; and a communication unit transmitting the power control amount to the distributed energy resource.