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The Different LVRT Control Strategy of Wind Generator Suppressing for Transient Overvoltage by DC Commutation Failure
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Abstract
At present, the characteristics of large capacity DC and high proportion of new energy centralized delivery is showed for power system of China. The ability of UHVDC to transmit new energy is severely reduced for caused transient overvoltage after AC/DC contingencies and further research is urgently needed. Firstly, the transient overvoltage caused by DC commutation failure is analyzed based on the large-scale wind power centralized delivery of the actual power system. Then, the physical mechanisms of transient overvoltage of converter station and wind farms resulted are analyzed by the actual power system DC commutation failure contingencies recorder. The impact of wind generator low voltage ride through (LVRT) active/reactive power characteristics for transient overvoltage is emphatically analyzed. Finally, all the analysis results are verified through simulation of practical case systems. The study can provide technical references to safe and stable operation of the power system in new situation.
Title: The Different LVRT Control Strategy of Wind Generator Suppressing for Transient Overvoltage by DC Commutation Failure
Description:
Abstract
At present, the characteristics of large capacity DC and high proportion of new energy centralized delivery is showed for power system of China.
The ability of UHVDC to transmit new energy is severely reduced for caused transient overvoltage after AC/DC contingencies and further research is urgently needed.
Firstly, the transient overvoltage caused by DC commutation failure is analyzed based on the large-scale wind power centralized delivery of the actual power system.
Then, the physical mechanisms of transient overvoltage of converter station and wind farms resulted are analyzed by the actual power system DC commutation failure contingencies recorder.
The impact of wind generator low voltage ride through (LVRT) active/reactive power characteristics for transient overvoltage is emphatically analyzed.
Finally, all the analysis results are verified through simulation of practical case systems.
The study can provide technical references to safe and stable operation of the power system in new situation.
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