摘要
我国正积极构建新型电力系统,但当前复杂的电力网络极易出现潮流分布不合理的问题,新能源的波动性更是加剧了潮流的不可控程度,电网亟需有效的潮流调节技术。移相变压器具有潮流调节能力强、投资较低、可靠性高等优点,在国际上得到广泛应用。但传统移相变压器只能实现离散调节,调节精度低,而且缺乏合适的调幅能力。该文提出三重调压移相变压器,具有调节精度高、调幅能力强等优点。基于其拓扑结构对其输入输出特性进行分析,考察其补偿电压的性质与分布,并从一重调幅的约束作用和双重调相的约束作用两方面建立边界方程;对其潮流调节范围进行定量分析,得出不同情况下潮流调节范围的最值表达式与边界计算方法;最后,通过虚拟仿真和实物实验证明,该结构可以有效增加调节点位数目、提高调节精度、引入调幅能力和优化调节范围。
China is actively building a new type of power system,but the current complex power network is prone to problems of unbalanced power flow distribution,which are exacerbated by volatility of new energy sources.The power grid urgently needs effective power flow regulation technology.Phase shifting transformers have the advantages of strong power flow regulation capability,low investment,and high reliability,and have been widely used internationally.However,traditional phase shifting transformers can only achieve discrete adjustment,with low adjustment accuracy and limited amplitude regulation capability.Therefore,this article proposes a triple regulation phase shifting transformer,which has strong amplitude regulation capability with high accuracy.Based on its topology structure,this article analyzes its input-output characteristics,investigates the properties and distribution of compensation voltage,and establishes boundary equations from the constraint effects of single amplitude modulation and dual phase modulation.The power flow regulation range is quantitatively analyzed to obtain the maximum expression and calculation method of the power flow regulation range under different conditions.Finally,virtual simulation and physical experiments prove that this structure can effectively increase the number of regulation points,improve regulation accuracy,enable amplitude modulation,and optimize the regulation range.
作者
袁佳歆
刘航亚
周航
肖非然
翟志峰
YUAN Jiaxin;LIU Hangya;ZHOU Hang;XIAO Feiran;ZHAI Zhifeng(State Key Laboratory of Power Grid Environmental Protection(Wuhan University),Wuhan 430072,Hubei Province,China;Laboratory of Hydro-Wind-Solar Multi-Energy Control Coordination(Wuhan University),Wuhan 430072,Hubei Province,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国电机工程学报》
北大核心
2025年第18期7359-7372,I0028,共15页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
国家自然科学基金项目(52207182,U2166207)
中国长江电力股份有限公司科技项目(Z242302009)
湖北省科技重大专项(2022AAA007)。
关键词
移相变压器
潮流调控
电压调节
拓扑结构
phase shifting transformer(PST)
power flow control
voltage regulation
topological structure
