Short Circuit Characteristics Analysis and Modeling on Inverter End of Energy Storage Power Station

doi:10.16628/j.cnki.2095-8188.2021.12.004

Abstract

Abstract:

As the intra-day peak-valley difference of grid load has further expanded,a large number of energy storage power stations have been put into operation in order to meet the needs of grid peak shaving and other requirements.Compared with the traditional power supply,the short-circuit current output characteristics of the inverter terminal have changed greatly after the fault.At present,steady-state fault models are often used for analysis and calculation,but the accuracy is not high.This paper introduces the control strategy of the inverter end of the energy storage power station under the low voltage ridethrough state,and builds a fault simulation platform.The impact of three main factors on the transient short-circuit output characteristics is compared and analyzed,and then a short-circuit current mechanism model based on voltage drop is proposed.According to the different degrees of voltage drop,the short-circuit current is modeled segmentally,and a certain algorithm is used for parameter identification.Finally,the accuracy of the built model is verified by simulation comparison.

Key words: energy storage power station, inverter power supply, short-circuit current, low voltage ride through, model

CLC Number:

TM713

LV Lixing, XU Feng, SUN Haoquan, DENG Huabin, JI Tongjun, CHEN Qian, ZHANG Zhengwei. Short Circuit Characteristics Analysis and Modeling on Inverter End of Energy Storage Power Station[J]. LOW VOLTAGE APPARATUS, 2021, 0(12): 20-27.

Figures/Tables 11

References 21

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