| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 94 === Before the wind farms interconnect power system, the report of system impact assessment of wind farm concerning the power quality should be submitted to Taiwan Power Company （Taipower） according to Taipower guidelines “the technical rules of distributed generation interconnection”. For the purpose of getting a better understanding about wind farm interconnection, it is necessary to establish suitable simulation software in order to really respond the dynamics behavior in term of system stability and offer the function for calculating the faulting current during short-circuit faulting.
This dissertation takes PSS/E as a simulation tool and Shi-men wind farm as an example to simulate the wind farm interconnection impact so as to analyze the voltage and frequency fluctuation, real power output of wind generation and its rotor angle variation during faulting. The faulting dynamic simulation can provide the valuable data regarding the response of voltage and frequency both in wind farm and power system so as to estimate system stability. And, the faulting simulation also gives useful information to evaluate the faulting interruption capacity of circuit breakers of wind farm and system. Due to more and more wind farms interconnecting Taipower system, the wind farms will certainly affect power system operation in the long run. The dynamic faulting analysis of wind farms interconnection will play a significant role in assuring the system operation security, and this dissertation therefore shows its value in inspecting system reliability and stability.
The dynamic faulting simulation analysis of the Shi-men interconnection shows that the frequency of wind farm can follow the technical rules easily but the voltage fluctuation is uneasy to meet technical requirement of Taipower interconnection guideline. The voltage fluctuation could easily over the upper or lower deadband setting when system faulting occurs, and therefore the circuit breakers of the wind farm could be tripped more frequently and hence influence system stability. Moreover, the faulting current at the point of common coupling also exceeds the Taipower’s rules according to simulation analysis. However, dynamic faulting simulation in this dissertation not only provides the valuable data to estimate the circuit breakers interrupting capacity but also recommends a reasonable assessment in terms of frequency and voltage both in wind farm and in Taipower system when the faulting occurs.
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