Battery Selection for Power Network Stabilization
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Solution Overview
Problem
The variability in natural energy power generation, such as photovoltaic and wind power, leads to fluctuations in power supply, causing potential power failures due to the time lag in adjusting turbine rotation speed at power plants, which existing battery systems may not adequately compensate for, resulting in unstable power networks.
Innovation Solution
A charge/discharge determining apparatus that acquires actual and predicted power values, compares them to battery energy capacities, and selects suitable batteries for charging or discharging to stabilize the power network by instructing power plants and battery systems to adjust their output accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery systems are used to compensate for power decrease, then power supply stability is improved, but battery systems with insufficient residual electric energy cannot provide adequate compensation
Solution Approach 1:
The patent implements dynamic selection of battery systems based on real-time residual electric energy levels. The determining section dynamically identifies which battery system has sufficient energy to compensate for the power decrease, adapting the compensation strategy to current system states rather than using a fixed approach.
Solution Approach 2:
The determining section acts as an intermediary between the power plant control and battery systems. It receives information about power decrease, evaluates the energy status of multiple battery systems, and selects the appropriate battery system to provide compensation, ensuring that only batteries with sufficient residual energy are utilized.
2Power
If turbine rotation speed is changed to adjust power supply, then power supply amount can be increased, but it takes time for the new rotation speed to be established
Solution Approach 1:
The patent applies preliminary action by using battery systems to compensate for power decreases during the transition period before the power plant can adjust its turbine rotation speed. This preliminary compensation prevents power failures from occurring during the time it takes for the turbine to reach its new rotation speed.
3Adaptability or versatility
If multiple battery systems are available, then selection flexibility is improved, but determining which battery to use becomes more complex
Solution Approach 1:
The patent uses parameter changes by evaluating battery systems based on their residual electric energy levels. The determining section compares the power decrease amount against the residual energy of each battery system, selecting batteries that meet the energy requirement. This parameter-based approach simplifies the complexity of choosing from multiple battery systems.
Data Source
AI summary
There is provided a charge/discharge determining apparatus for managing a natural energy power generation facility, a power plant and a plurality of batteries in an electrical power system. The apparatus includes: a system information acquiring section configured to acquire an actual value of natural energy power that is supplied from the natural energy power generation facility to the electrical power system; a battery information acquiring section configured to acquire battery electric energy information from the respective batteries, wherein the battery electric energy information indicates charge/discharge electric energies of the respective batteries which can be discharged from or charged in the respective batteries; and a determining section configured to determine at least one battery to be charged/discharged from among the plurality of batteries, wherein when an absolute value of a difference between the actual value and a predicted value of the natural energy power is larger than a threshold value.