Wind Power Converter Controller Voltage Reduction Response
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Solution Overview
Problem
Existing wind power generating equipment experiences delayed responses due to control delays in data communication during instantaneous voltage reductions, leading to potential damage from increased DC voltage and rotation speed, causing system shutdowns.
Innovation Solution
The implementation of a wind power generating equipment configuration that includes a power conversion system with a power converter controller capable of independently computing and controlling active power command values based on system voltage reductions, allowing for immediate response and stable operation during voltage abnormalities without relying on high-order system data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power conversion system operates by receiving the torque command value from the generator control system as the high-order system, then the control structure maintains hierarchical organization, but control delay occurs due to data communication and response to abrupt transient phenomena is delayed
Solution Approach 1:
The control function is segmented into two independent parts: the generator control system continues to output torque command values, while the power conversion system independently determines active power command values based on system voltage conditions. This segmentation eliminates the need for data communication between systems during voltage reduction, achieving immediate response without compromising the hierarchical control structure.
Solution Approach 2:
The power conversion system performs self-service by independently determining active power command values based on its own detection of system voltage reduction, without relying on data from the generator control system. This self-determination capability enables immediate response to transient phenomena while maintaining the overall control hierarchy.
2Reliability
If the control system waits for data communication from the high-order system, then centralized control is maintained, but the response to instantaneous voltage reduction is delayed causing damage to smoothing capacitor and significant increase in rotation speed
Solution Approach 1:
The power conversion system takes preliminary action by independently determining active power command values as soon as it detects system voltage reduction, before any data communication with the generator control system occurs. This preliminary action prevents the harmful effects of delayed response, including DC voltage increase and rotation speed surge, while the generator control system continues its centralized control function.
3Reliability
If the wind power generating equipment implements immediate response to voltage reduction, then system stability is improved, but the control system complexity increases
Solution Approach 1:
The control functions are merged in the sense that both the generator control system and power conversion system operate independently but cooperatively. The generator control system outputs torque command values while the power conversion system determines active power command values based on system voltage, creating a unified control approach that improves stability without significantly increasing overall system complexity.
Data Source
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AI summary
[Object] There are provided wind power generating equipment, an operation method of the wind power generating equipment, and a wind farm, which are capable of reducing control delay due to data communication between a power conversion system and a wind turbine control board as a high-order system thereof and stably continuing an operation of a wind power generating system when instantaneous voltage reduction occurs during an occurrence of system abnormality. [Solution] There is provided wind power generating equipment including: a generator 2 that is driven by a blade 1 which rotates by receiving the wind; a power converter 5 that converts an electric output of the generator 2 such that the output is interconnected with an electric power system; a power converter controller 6 that controls the power converter 5; and a wind turbine control board 15 that transmits, to the power converter controller 6, an active power command value that is used as a command value of the electric output which is transmitted from the power converter 5. The power converter controller 6 controls an electric output of the power converter 5 in response to an active power command value depending on a reduction amount of a system voltage when instantaneous reduction occurs in the system voltage interconnected with the wind power generating equipment.