Windfarm Control System Using Aerographs for Output Smoothing
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Solution Overview
Problem
The increasing number of power generation stations makes it difficult to adjust voltage and frequency in power systems, leading to challenges in maintaining a stable output from wind farms, especially when wind power generation fluctuates with weather conditions, and existing methods like using electric storage devices incur high costs.
Innovation Solution
A windfarm control system that includes variable-speed wind power generators, aerographs to measure wind direction and velocity, and local controllers to adjust rotational speeds, estimating and smoothing output fluctuations by calculating control levels and delivering instructions to maintain constant output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of power generation stations is increased to promote wind power generation, then the introduction of wind power generation is promoted, but the adjustment of voltage and frequency becomes difficult and automatic load frequency control capability becomes deficient
Solution Approach 1:
The system performs preliminary estimation of wind velocity fluctuations and generator output fluctuations before they occur. By using aerographs to detect wind conditions and estimating future fluctuations, the control system can proactively adjust generator outputs to prevent frequency instability, rather than reacting after problems occur.
Solution Approach 2:
The system continuously monitors wind velocity and generator output, using this feedback to dynamically adjust control strategies. The central controller receives real-time data from aerographs and local controllers, estimates fluctuations, and delivers corrected output targets to maintain frequency stability despite increasing numbers of wind generators.
2Stability of the object's composition
If electric power storage devices such as accumulator batteries are used to suppress power fluctuation, then the fluctuation of electric power can be suppressed, but the cost burden on wind power generation entrepreneurs increases
Solution Approach 1:
The system enables the windfarm to self-regulate its output by using aerographs to detect wind conditions and the central controller to estimate fluctuations and adjust generator outputs. This self-service approach eliminates the need for external storage devices like batteries, as the system uses its own measurement and control capabilities to suppress power fluctuations.
Solution Approach 2:
The invention replaces the mechanical/electrical storage system (batteries) with a control-based system using aerographs and a central controller. Instead of physically storing energy to smooth fluctuations, the system uses information processing and active control of generator rotational speeds to achieve the same stability effect without the cost of storage infrastructure.
3Reliability
If the output of wind power generators is controlled to maintain constant frequency, then the frequency stability is improved, but the fluctuation of wind power generation must be suppressed which reduces productivity
Solution Approach 1:
The system estimates wind velocity fluctuations and generator output fluctuations in advance, allowing proactive adjustment of control targets. By predicting future conditions rather than reacting to past deviations, the system can maintain frequency stability while maximizing actual energy capture from varying wind conditions.
Solution Approach 2:
The system dynamically adjusts the control targets for each generator based on real-time wind conditions and predicted fluctuations. Rather than using fixed control strategies, the central controller continuously updates output targets to balance frequency stability requirements with optimal power generation, adapting to changing wind patterns throughout the output fluctuation evaluating time.
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
The system effectively suppresses power fluctuations and maintains a constant output level, enhancing the control capability of the power system while reducing the economic burden on wind power generation by optimizing wind energy utilization.
Implementation Method 1
plural aerographs disposed in the vicinity of the wind power generators, to measure the directions and powers of the wind at the sites of the generators
Implementation Method 2
plural wind power generators whose rotational speeds are variable
Implementation Method 3
minimizing operational costs by storing wind power as rotational energy
Data Source
AI summary
The disclosed windfarm control system comprising a windfarm and a central controller; the windfarm including plural wind power generators whose rotational speeds are variable, plural aerographs disposed in the vicinity of the wind power generators to measure the directions and powers of the wind at the sites of the generators, and plural local controllers disposed in the vicinity of the wind power generators to control the output of the wind power generators by controlling the rotational speeds of the generators; wherein the central controller calculats the control level which maintains the output of the windfarm constant for a predetermined time period and instructs the local controllers to control the rpm's of the wind power generators in accordance with the control level.