Wind Power Control Device Dynamic Output Adjustment
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Solution Overview
Problem
The high technical requirements for system interconnection from power companies pose a challenge for wind power producers, making it difficult to achieve constant-output control type wind power stations profitably, as they require a substantial storage battery system, leading to increased installation costs.
Innovation Solution
A wind power generation system with a wind power generator group and a storage battery system, controlled by a device that calculates and adjusts the planned generation power value based on average wind power and battery charging rates to maintain power within set limits, reducing the need for excessive storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant-output control type wind power plant is implemented to meet power company interconnection requirements, then power stability and compliance with interconnection standards are improved, but installation cost increases significantly due to requiring a large storage battery system (about 85% of total power output)
Solution Approach 1:
The patent applies dynamics by making the control target variable rather than fixed. The control target is dynamically adjusted based on the average wind-generated power over a predetermined period, allowing the system to adapt to changing wind conditions while maintaining power stability. This dynamic approach reduces the need for excessive storage battery capacity compared to a fixed constant-output control system.
Solution Approach 2:
The patent implements preliminary action by calculating the average wind-generated power over a predetermined period before setting the control target. This advance calculation allows the system to proactively adjust the control target based on historical data, enabling smoother power output control and reducing the storage battery capacity needed to handle sudden variations.
2Reliability
If a large storage battery system is installed to achieve constant-output control, then the ability to suppress power variation is improved, but the storage capacity and installation cost increase substantially
Solution Approach 1:
The patent makes the control target dynamic by basing it on the average wind-generated power over a predetermined period. This dynamic adjustment allows the system to suppress power variations effectively while optimizing the required storage battery capacity, avoiding the need for excessive capacity that would be required with a fixed control target.
Solution Approach 2:
The patent changes the control parameter from a fixed value to a variable that depends on the average wind-generated power. By changing the control target parameter dynamically, the system achieves effective power variation suppression with reduced storage battery capacity, as the control target adapts to actual wind conditions rather than requiring over-provisioning.
3Speed
If the control target is set based on instantaneous wind power, then responsiveness to current conditions is improved, but power stability deteriorates due to moment-to-moment wind variations
Solution Approach 1:
The patent applies preliminary action by calculating the average wind-generated power over a predetermined period before setting the control target. This advance averaging smooths out instantaneous fluctuations while maintaining responsiveness to overall trends, achieving a balance between responsiveness and power stability that instantaneous control cannot provide.
Solution Approach 2:
The patent implements dynamics by making the control target variable based on the averaged historical data. This dynamic approach allows the system to respond to changing wind conditions over time while filtering out short-term variations, maintaining both responsiveness and power stability simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the storage capacity and installation costs of wind power plants, enabling them to meet interconnection requirements while maintaining power stability and reducing penalties.
Implementation Method 1
a storage battery system composed of a plurality of storage batteries (21)
Data Source
AI summary
For reducing a storage capacity of a storage battery system and an installation cost at a constant-output control type of wind power plant, a wind power generation control device sets as a planned generation power value PT: an average wind generated power value PA, when a current battery charging rate SOC of the storage battery system is within the range of the upper and lower limit values of the targeted battery charging rate range SOCT (S12); a value obtained by multiplying a positive constant greater than 1 to the said PA, when the current battery charging rate SOC is above the upper limit value of the said SOCT (S14): and a value obtained by multiplying a positive constant less than 1 to the said PA, when the current battery charging rate SOC is below the lower limit value of the said SOCT (S15).