中国电机工程学报2024，Vol.44Issue(16)：6470-6481,12.DOI:10.13334/j.0258-8013.pcsee.230500
高压直挂大容量电池储能系统电池簇故障容错运行控制策略
Battery Clusters Fault Tolerance Operation Control Strategy for High-voltage Transformerless Large-capacity Battery Energy Storage System
摘要
Abstract
The high-voltage transformer-less battery energy storage system(BESS)adopts the concept of cascading H-bridge circuits to connect the high-voltage power grid.A large number of battery cells are separated equally into numerous clusters at the DC side of H-bridge submodules,and a high degree of modularity features the BESS.Compared with the low-voltage solution,it has obvious advantages,such as a larger capacity for a single machine,higher efficiency,and faster response speed.As a high energy density energy storage medium,the safe and stable operation of lithium battery highly depends on the reliability of battery core.In the traditional fault-tolerant control of battery cluster,the whole submodule is removed by setting AC bypass switch directly.This strategy requires additional redundant modules,which increases the energy storage cost.Due to the limitation of modulation ratio,the number of modules exiting the battery cluster fault is limited,and the capacity utilization rate of the system is not high.In this paper,the fault-tolerant strategy of battery cluster is proposed to remove the faulty battery cluster by DC circuit breaker,and switch the faulty module from the active charge-discharge mode to the reactive fault-tolerant mode,so as to give full play to the power grid voltage support capability of the faulty module.The proposed control strategy can realize the withdrawal of any number of modules,and other sub-modules can continue to store or release energy,which is of great significance to improve the utilization rate of system capacity at the end of charge and discharge.关键词
高压直挂/锂电池/储能系统/故障切除/容错运行Key words
high-voltage transformer-less/lithium battery/energy storage system/fault removal/fault tolerance operation分类
信息技术与安全科学引用本文复制引用
吴西奇,黄超,刘畅,李睿,蔡旭..高压直挂大容量电池储能系统电池簇故障容错运行控制策略[J].中国电机工程学报,2024,44(16):6470-6481,12.基金项目
国家自然科学基金项目(51837007,52177187).Project Supported by National Natural Science Foundation of China(51837007,52177187). （51837007,52177187）
