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含分布式光伏接入的三相牵引供电系统电压协调控制方法

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牵引供电系统中光伏并网逆变器普遍处于弱可控状态且缺乏多机间协调配合,为了使分布式光伏在实现牵引能耗优化的同时,主动参与牵引网电压调控,提出了用于三相牵引供电系统的电压协调控制策略.针对含光伏的新型三相牵引供电系统拓扑,分析了系统电压-有功和无功定量关系.结合分布式光伏无功裕度及协调关系,设计了3阶段分布式电压协调控制策略,根据电压灵敏度判定各节点补偿与削减优先度,实现了分布式光伏无功协调补偿及有功优化削减,达到牵引网电压主动控制.最后,通过对系统多工况下仿真,验证策略有效性.仿真结果表明,所提协调控制策略在三相牵引供电系统复杂的运行工况下,能够在兼顾光伏能量利用率的同时,增强系统电压调控能力,解决牵引网电压越限问题,并有效降低牵引网损耗.研究通过有效利用光伏支撑牵引网电压,为机车的安全、高效运行提供保障.
Voltage Coordination Control Method of Three-phase Traction Power Supply System with Distributed Photovoltaic Integration
The photovoltaic grid-connected inverters in traction power supply system generally operate in weak control-lable state and lack multiple coordination. To solve this problem, a voltage coordination control method for three-phase traction power supply system is proposed to ensure distributed photovoltaic to actively participate in regulating voltage of traction network while optimizing traction energy consumption. The quantitative relations between voltage and active power/reactive power are analyzed considering topology of three-phase traction power supply system with photovoltaic integration. Combined reactive power margin and coordinated control of distributed photovoltaic, a three-stage distributed voltage coordination control method is proposed to determine the compensation and curtailment priority by voltage sensi-tivity, so as to realize active control of traction network voltage by optimizing reactive power compensation and active power curtailment. Finally, effectiveness of the strategy is verified by simulation of system under multiple conditions. The simulation results show that the strategy under complex operating conditions of three-phase traction power supply system can enhance voltage regulatory capability while taking into account the utilization rate of photovoltaic energy, avoid volt-age violation of traction network, and effectively reduce network power loss. The study strengthens the traction network voltage through the effective use of photovoltaic to ensure the safe and efficient operation of locomotives.

three-phase traction power supply systemdistributed photovoltaicvoltage sensitivityvoltage coordination controlphotovoltaic invertervoltage violation

王翰林、黄小红、李昊洋、彭友、任桃、李群湛

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西南交通大学电气工程学院,成都610031

三相牵引供电系统 分布式光伏 电压灵敏度 电压协调控制 光伏逆变器 电压越限

中国国家铁路集团有限公司科技研发计划四川省科技计划四川省科技计划

SY2020G00121YYJC33242022YFQ0104

2024

10.13336/j.1003-6520.hve.20221667

高电压技术
中国电力科学研究院　中国电机工程学会

高电压技术

CSTPCD北大核心
影响因子：2.32
ISSN：1003-6520
年,卷(期)：2024.50(4)
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