摘要
针对智能煤矿建设的需求和煤矿井下电网存在的问题,提出了一种含有储能模块的储能型模块化多电平混合式配电变压器(MMC-HDT)。首先,对提出的储能型MMC-HDT进行建模,并考虑电网故障和储能荷电状态(SOC)给出四种工作运行模式。其次,根据MMC-HDT交流侧的端口受控耗散哈密顿模型(PCHD)设计无源控制器。最后,设计四种工作运行模式的切换控制策略。实验结果表明,所提控制策略在储能型MMC-HDT中,馈网电流稳态总谐波畸变率进一步降低,有效限制电压故障时馈网电流无限制突增;在任何电网电压故障状态下,均可以实现负荷电压保持在额定值处,可以实现不间断供电的功能,提高了配电系统的可靠性。
Aiming at the demand of intelligent coal mine and exit problem of underground coal mine power network,an energy storage hybrid distribution transformer based on modular multilevel converter(MMC-HDT)was proposed.Firstly,the proposed energy storage MMC-HDT was modeled and four operation modes were given considering grid fault and state of charge(SOC).Secondly,the passivity-based controller was designed according to the port controlled Hamiltonian with dispersion(PCHD)model on the AC side of MMC-HDT.Finally,the switching control strategy of four operation modes was designed.The experimental results show that the proposed control strategy in energy storage MMC-HDT can further reduce the steady-state total harmonic distortion(THD)rate of feeder current and effectively limit the unrestricted sudden increase of feeder current in case of voltage fault.In any grid voltage fault state,the load voltage can be maintained at the rated value,the function of uninterrupted power supply can be realized,and the reliability of the distribution system can be improved.
作者
杨天翔
程志江
杨涵棣
田峰
YANG Tianxiang;CHENG Zhijiang;YANG Handi;TIAN Feng(Engineering Research Center of Ministry of Education for Renewable Energy Generation and Grid Connection Technology,Xinjiang University,Urumqi 830047,Xinjiang,China)
出处
《电气传动》
2023年第8期19-28,共10页
Electric Drive
基金
新疆维吾尔自治区自然基金(2021D01C046)
新疆维吾尔自治区重点实验室建设项目(2021D04011)。
关键词
混合配电变压器
端口受控耗散哈密顿模型
无源控制
模块化多电平变换器
hybrid distribution transformer(HDT)
port controlled Hamiltonian with dispersion(PCHD)
passivity-based control
modular multilevel converter(MMC)
