储能装置的投入对整流发电机突加负载时瞬时电压的影响

为了定量确定整流发电机突加负载时的瞬时电压变化与储能补偿功率之间的关系,提出了一种基于负载等效和曲线拟合的瞬时电压计算方法。该方法通过将整流发电机直流侧的突加负载折算到交流侧,并利用整流桥的电压特性,分别给出了空载突加和带载突加时的瞬时电压表达式；然后,将储能装置的投入等效为负电阻的形式进行功率补偿,通过计算得到瞬时电压与补偿功率之间的关系；最后,根据PSCAD仿真结果对理论计算进行曲线拟合,得到调整后的瞬时电压与补偿功率之间的关系,为下一步研究储能装置的优化配置提供了理论依据。

Influence of Energy Storage Device on the Instantaneous Voltage of Rectifier Generator with suddenly-applied load

To quantitatively determine the relationship between instantaneous voltage and energy storage power of rectifier generator, a transient voltage calculation method based on load equivalence and curve fitting is proposed. DC-side load of rectifier generator converted to AC-side, and with the voltage characteristics of the rectifier bridge exploited, instantaneous voltage are given respectively under sudden-added situations of no-load and with load. Then function of energy storage device was equivalent to negative resistance in the form of power compensation, the relationship between the instantaneous voltage and power compensation could be derived by calculation. Finally, on the basis of theoretical calculation, the relationship between the adjusted instantaneous voltage and power compensation could be obtained by curve fitting for PSCAD simulation results. It provides a theoretical basis for the optimal allocation of energy storage.