电器与能效管理技术 ›› 2021, Vol. 0 ›› Issue (12): 20-27.doi: 10.16628/j.cnki.2095-8188.2021.12.004

• 研究与分析 • 上一篇    下一篇

储能电站逆变端短路电流分析与建模

吕力行1, 许峰1, 孙浩权1, 邓化彬2, 吉同军2, 陈谦3, 张政伟3   

  1. 1.浙江浙能电力股份有限公司 萧山发电厂, 浙江 杭州 311251
    2.南瑞集团有限公司(国网电力科学研究院有限公司), 江苏 南京 211106
    3.河海大学 能源与电气学院, 江苏 南京 211100
  • 收稿日期:2021-09-21 出版日期:2021-12-30 发布日期:2022-01-24
  • 作者简介:吕力行(1966—),男,高级工程师,主要从事源网荷储互动技术、继电保护的研究。|许 峰(1972—),男,高级工程师,主要从事源网荷储互动技术等方面的研究。|孙浩权(1970—),男,工程师,主要从事发电厂电气自动化、继电保护设备管理等方面的研究。
  • 基金资助:
    国家自然科学基金重点项目(51837004)

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

LV Lixing1, XU Feng1, SUN Haoquan1, DENG Huabin2, JI Tongjun2, CHEN Qian3, ZHANG Zhengwei3   

  1. 1. Zhejiang Xiaoshan Power Plant of Zhejiang Zheneng Electric Power Co.,Ltd., Hangzhou 311251, China
    2. Nari Group Co.,Ltd.(State Grid Electric Power Research Institute Co.,Ltd.), Nanjing 211106, China
    3. College of Energy and Electrical Engineering,Hehai University, Nanjing 211100, China
  • Received:2021-09-21 Online:2021-12-30 Published:2022-01-24

摘要:

随着电网负荷的日内峰谷差进一步扩大,为了满足电网调峰等需求,大量储能电站已投入运行。与传统电源相比,故障后其逆变端短路电流输出特征发生了较大的改变,目前较多采用稳态故障模型进行分析计算,但准确性不高。在介绍低电压穿越状态下储能电站逆变端控制策略的基础上,构建故障仿真平台,对比分析了3个主要因素对暂态短路输出特性的影响,并提出了一种基于电压跌落的短路电流非机理模型。根据电压跌落不同程度,对短路电流分段建模,并采用一定算法进行参数辨识。最后,通过仿真对比验证了所建模型的准确性。

关键词: 储能电站, 逆变电源, 短路电流, 低电压穿越, 建模

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

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