A high-voltage ride-through test system for wind turbines

Abstract

The invention provides a wind turbine power generation set high voltage ride through test system. The wind turbine power generation set high voltage ride through test system comprises a power grid high-voltage generation device connected between a tested wind turbine power generation set and the power grid. The high-voltage generation device tests the high voltage ride through capacity of the tested wind turbine power generation set through simulated power grid overvoltage, and comprises an inductive resistor X1, an inductive resistor X2, a switch K1 and a switch K2, the inductive resistor X1 is connected with the switch K1 in parallel and then the inductive resistor X1 and the switch K1 are connected between the tested wind turbine power generation set and the power grid, and the connecting point of the high-voltage generation device and the tested wind turbine power generation set passes through the switch K2 and the inductive resistor X2 and then is grounded, wherein the switch K2 and the inductive resistor X2 are connected in series. During the testing process, the switch K1 is disconnected, the switch K2 is closed, the inductive resistor X2 provides capacitive reactive current support, the capacitive reactive current generates voltage drop on the inductive resistor X1, and the voltage of the connecting point of the voltage generation device and the tested wind turbine power generation set is improved. The wind turbine power generation set high voltage ride through test system can real simulate and generate practical power grid overvoltage characteristics, and the rising speed of the voltage and the voltage waveform quality of the testing system coincide with the practical power grid overvoltage characteristics very well.

Description

technical field [0001] The invention relates to the field of wind farm testing, in particular to a high-voltage ride-through testing system for wind turbines. Background technique [0002] With the rapid development of the wind power industry, the penetration rate of wind power into the power grid is getting higher and higher, and the mutual influence between wind power and power grid is becoming more and more obvious. Since 2010, due to the lack of low voltage ride through (Low Voltage Ride Through, LVRT) capability of wind farms / wind turbines, many large-scale wind power off-grid accidents have occurred, which has brought huge challenges to the safe and stable operation of the power system. Since 2011, most wind farms / wind turbines have had low-voltage ride-through capability. However, several wind power off-grid accidents since 2012 have shown that wind farms / wind turbines do not have high-voltage ride-through capability (High Voltage RideThrough, HVRT). One of the main ...

AI Technical Summary

Problems solved by technology

Since 2010, due to the lack of low voltage ride through (Low Voltage Ride Through, LVRT) capability of wind farms / wind turbines, many large-scale wind power off-grid accidents have occurred, which has brought huge challenges to the safe and stable operation of the power system.

The utility model patent "Mobile Wind Turbine High and Low Voltage Ride-through Test Device" patent number is: 201220255118.5, although it provides a power grid high voltage simulation scheme, which realizes the rise of wind turbine terminal voltage through the transformer secondary winding tap jump, but The high-voltage waveform generated by this method has a too fast voltage rise rate and cannot simulate the phase angle and power quality changes in the actual grid overvoltage process, which is not suitable for the test requirements of the high-voltage capability of wind turbines.

Images