Distributed Power Output Control for Voltage and Loss Constraints
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Solution Overview
Problem
In electric power systems with distributed power supplies, existing technologies struggle to maintain electrical power and voltage while minimizing power transmission loss and output suppression.
Innovation Solution
A power distribution apparatus that calculates active and reactive power output for distributed power supplies, using an output estimation unit to predict future output ranges based on past operation history, and a calculating unit to optimize power output within predetermined objective and constraint conditions, including voltage maintenance and power transmission loss minimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If distributed power supplies are introduced to reduce power transmission loss, then power transmission loss is reduced, but voltage stability and electrical power maintenance become difficult to ensure
Solution Approach 1:
The system performs preliminary estimation of the output range of distributed power supplies based on past operation history before actual power distribution. This advance prediction allows the calculating unit to pre-determine active and reactive power outputs that will satisfy voltage constraints, preventing voltage instability rather than reacting to it after occurrence.
Solution Approach 2:
The system uses past operation history as feedback to continuously improve output range estimation. By analyzing historical data of distributed power supply outputs, the system refines its predictions and adjusts power distribution calculations to maintain voltage stability while maximizing renewable energy utilization.
2Reliability
If output of distributed power supplies is suppressed to maintain voltage within range, then voltage stability is maintained, but power transmission loss increases and economic efficiency decreases
Solution Approach 1:
The system calculates both active power and reactive power outputs for distributed power supplies, optimizing two power parameters simultaneously. By adjusting reactive power in addition to active power, the system can maintain voltage within acceptable ranges while minimizing the need to suppress distributed power supply output, thereby reducing power transmission loss.
3Productivity
If maximum output is extracted from distributed power supplies, then productivity increases, but voltage may deviate from acceptable ranges and system reliability decreases
Solution Approach 1:
The system dynamically determines the output range of distributed power supplies based on estimated characteristics from past operation history. Rather than using fixed output limits, the system adaptively adjusts the permissible output range according to learned patterns, enabling maximum productive output while maintaining voltage stability through calculated active and reactive power distribution.
4Reliability
If robust optimization is performed considering output range uncertainty, then voltage constraint satisfaction is improved, but calculation complexity increases
Solution Approach 1:
The system performs preliminary estimation of the output range before optimization calculation. By pre-determining the probable output range based on historical data, the robust optimization can focus on this constrained range rather than considering all possible values, significantly reducing calculation complexity while still ensuring voltage constraints are satisfied across the uncertainty range.
Data Source
AI summary
A power distribution apparatus configured to calculate, for a plurality of distributed power supplies connected to an electric power system, active power and reactive power to be outputted from each of the distributed power supplies, comprising: output estimation unit for estimating, based on the past operation history of each of the distributed power supplies, the output range of the electrical power that can be outputted from each of the distributed power supplies in the future; and a calculating unit configured to calculate, based on the output range, the active power and the reactive power of each of the distributed power supplies, which can satisfy a predetermined objective condition and constraint condition.