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5.2.2 Grid-tied Wind Turbine System
5.2.2.1 No power feed into grid
1) wind speed is too low, wind turbine still haven’t reach it’s cut-in wind speed, so no current generated in less than 2.5m/s wind speed.
2) Wind speed is too high, wind turbine output voltage reach the over-voltage point, controller short-circuit braking system protect the wind
turbine and the whole system, the system will restore automatically when the wind speed decrease.
3) The controller short-circuit brake was switched on manually, it will restore when switch on the short-circuit switch manually.
4) On-grid inverter is in disconnected from grid or damaged. (Reference: inverter user manual)
5) Check whether controller DC output voltage is normal. Troubleshooting: wind turbine troubleshooting (Reference:5.1.4); check whether
①
②
the controller is damaged (Reference: controller user manual).
6) Check whether the system wiring is correct, note that electrodes should be connected in a right way, the system will restore by automatically
after reconnected.
7) The wind turbine output characteristics and inverter does not match; solutions:
①
replace wind turbine;
②
replace on-grid inverter; adjust
③
the internal parameters (power curve and power factor setting)of the on-grid inverter.
8) Check whether the wiring is loose, poor contact and the state-grid is stable.
5.2.2.2 Low charging power
1) Wind turbine output voltage is low; main reasons:
low wind speed; wind turbine troubleshooting (Reference: 5.1.4).
①
②
2) The wind turbine output characteristics and inverter does not match; solutions:
①
replace wind turbine;
②
replace the on-grid inverter; adjust
③
the internal parameters of on-grid inverter.
