| 485 | 0 | 94 |
| 下载次数 | 被引频次 | 阅读次数 |
储能设备提供短路电流的原理与传统同步机组差异较大，传统短路电流计算方法理论难以适用，而储能电站及接入系统的开关选型、安全校核等方面的工作缺少准确的短路电流计算方法。针对这一问题，考虑储能低压穿越策略的影响，基于储能设备电磁暂态仿真模型，明确了低压穿越期间储能端口贡献电流特性，建立了适用于交流系统短路电流计算的储能设备等效电路及解析模型，进而计及储能设备贡献无功电流同接入系统节点电压的交互影响，提出基于融合迭代法的储能端口电流精细化计算方法，能够显著改善传统短路电流算法结果偏于保守的问题。通过电磁暂态仿真，验证了所提方法在储能电站在不同运行方式、故障电压跌落程度和控制方式/定值下的准确性。
Abstract：The principle of short-circuit current provided by energy storage equipment is quite different from that of traditional synchronous units,so the theory of traditional short-circuit current calculation method is difficult to apply,and there is a lack of accurate short-circuit current calculation methods in terms of switch selection and safety verification of an energy storage power station and its access system. To solve this problem,the influence of low-voltage ride through strategy for energy storage is taken into account. Based on the electromagnetic transient simulation model of energy storage equipment,the current contribution characteristics of energy storage port during low-voltage ride through is defined,and the equivalent circuit and analytical models of energy storage equipment for the calculation of short-circuit current in an AC system are established. On this basis,with the consideration of the interaction between the reactive current contributed by the energy storage equipment and the nodal voltage of the access system,a refined calculation method for the energy storage port current based on the integration of an iterative method is proposed,which can significantly improve the conservative results obtained by the traditional short-circuit current algorithm. Through electromagnetic transient simulations,the accuracy of the proposed method is verified under different operation modes,fault voltage sag degrees and control modes/fixed values of the energy storage power station.
[1]禹红，李明德，曾荷清，等（Yu Hong,Li Mingde,Zeng Heqing,et al）.电网故障下光伏并网低压故障穿越控制策略的研究（Control strategy of photovoltaic grid-connected low-voltage fault ride-through under power grid fault）[J].智慧电力（Smart Power）,2021,49(7):31-35,92.
[2]李红，粟时平，唐铭泽，等（Li Hong,Su Shiping,Tang Mingze,et al）.不对称故障下考虑电压跌落程度的新能源逆变器控制策略（Control strategy of renewable energy inverter considering voltage sag degree under asymmetric faults）[J].电力系统保护与控制（Power System Protection and Control）,2023,51(1):21-32.
[3]许守东，毕书奇，李世伟，等（Xu Shoudong,Bi Shuqi,Li Shiwei,et al）.考虑锁相暂态响应的光伏发电系统三相短路电流计算方法（Three-phase short-circuit current calculation method of photovoltaic power generation system considering phase-locked loop transient response）[J].电工电能新技术（Advanced Technology of Electrical Engineering and Energy）,2024,43(7):32-40.
[4]骆尧涵，汤皓环，李金裕，等（Luo Yaohan,Tang Haohuan,Li Jinyu,et al）.基于电压迭代的直驱风电场短路电流计算方法（A short-circuit current calculation method for direct-driven wind farms based on voltage iteration）[J].浙江电力（Zhejiang Electric Power）,2024,43(10):75-84.
[5]董张卓，俱世豪（Dong Zhangzhuo,Ju Shihao）.用于故障电流计算的双馈异步风力发电机等效模型（A doublyfed induction generator equivalent model for short-circuit current calculation）[J].电气应用（Electrotechnical Application）,2023,42(8):106-113.
[6]徐潜，王彤，王增平（Xu Qian,Wang Tong,Wang Zengping）.计及锁相环和电流内环暂态过程的逆变型电源故障电流解析方法（Fault current analysis method of inverter-interfaced renewable energy sources with PLL and current inner loop transient processes）[J].电网技术（Power System Technology）,2024,48(6):2603-2612.
[7]王强钢，周念成，李喜兰，等（Wang Qianggang,Zhou Niancheng,Li Xilan,et al）.计及低电压穿越的双馈感应发电机三相短路运算曲面法（Three-phase short circuit calculating method based on pre-computed surface for doubly-fed induction generators considering low-voltage ride through）[J].电力系统自动化（Automation of Electric Power Systems）,2015,39(18):49-54,61.
[8]令狐桐雯，韩民晓，霍启迪，等（Linghu Tongwen,Han Minxiao,Huo Qidi,et al）.考虑不同故障穿越模式的双馈风电场短路电流计算等值建模（Equivalent modeling of doubly-fed wind farms short-circuit current calculation considering different fault ride-through modes）[J].南方电网技术（Southern Power System Technology）,2022,16(10):28-37.
[9]易杨，沈豫，林章岁（Yi Yang,Shen Yu,Lin Zhangsui）.柔性直流输电系统贡献交流短路电流的特性分析及计算方法（Characteristics and analysis methods of AC shortcircuit current contributed by VSC-HVDC）[J].高电压技术（High Voltage Engineering）,2018,44(7):2150-2158.
[10]茆书睿，徐政，杨健，等（Mao Shurui,Xu Zheng,Yang Jian,et al）.交流系统短路故障下MMC对短路电流的影响及抑制策略（Influence analysis and control strategy of MMC on AC short circuit current under short circuit fault of AC system）[J].电力自动化设备（Electric Power Automation Equipment）,2020,40(12):134-142.
[11]王铁柱，万磊，卜广全，等（Wang Tiezhu,Wan Lei,Bu Guangquan,et al）.逆变侧交流系统三相短路时直流系统贡献短路电流的机理和计算方法研究（Mechanism and calculation method study of DC system contributed short-circuit current with three-phase short-circuit fault on inverter side）[J].电网技术（Power System Technology）,2016,40(5):1313-1319.
[12]刘岩，贾科，毕天姝，等（Liu Yan,Jia Ke,Bi Tianshu,et al）.基于末端机组电压前推的逆变型新能源发电场站故障等值计算（Fault equivalent calculation of inverter interfaced renewable energy generator stations based on extrapolation of terminal unit voltage）[J].电工技术学报（Transactions of China Electrotechnical Society）,2025,40(1):96-107.
[13]陈启超，李晖，王智冬，等（Chen Qichao,Li Hui,Wang Zhidong,et al）.计及柔性直流的系统短路电流实用计算方法（Practical calculation method for short-circuit current of system considering VSC-HVDC）[J].电力系统及其自动化学报（Proceedings of the CSU-EPSA）,2023,35(12):134-141.
[14]郭明星，霍启迪，赵鹏飞，等（Guo Mingxing,Huo Qidi,Zhao Pengfei,et al）.柔性直流贡献短路电流影响因素及工程算法误差分析（Influence factors of VSC-HVDC contribution short-circuit current and error analysis of engineering calculation method）[J].电力系统及其自动化学报（Proceedings of the CSU-EPSA）,2021,33(7):143-150.
[15] GB/T 15544.1—2023三相交流系统短路电流计算第1部分：电流计算[S].
基本信息:
DOI：10.19635/j.cnki.csu-epsa.001601
中图分类号:TM713
引用信息:
[1]霍启迪,唐晓骏,徐文佳,等.储能电站接入系统短路电流计算方法及验证[J].电力系统及其自动化学报,2025,37(11):45-52.DOI:10.19635/j.cnki.csu-epsa.001601.
基金信息:
国家电网公司科学技术项目（5100-202319032A-1-1-ZN）