The invention provides a distributed photovoltaic and traction power supply collaborative voltage unbalance compensation method, which belongs to the technical field of distributed photovoltaic and traction power supply collaboration, and comprises the following steps: dividing a power grid into a plurality of sub-regions, and adopting a collaborative compensation strategy for each sub-region. Specifically, the method comprises the following steps: firstly, determining compensation power required to be output by a traction power supply system compensation device SVG and a photovoltaic field station in each sub-region so as to reduce the voltage unbalance degree; and then, an improved multi-agent consistency algorithm is adopted to optimize compensation power output of each photovoltaic converter in each photovoltaic station. On the basis, the negative-sequence current and the voltage unbalance degree of the common coupling point before and after compensation are calculated respectively, and the constraint condition of the voltage unbalance degree is obtained; and finally, taking the constraint condition as a reference, and determining the specific compensation power and compensation current of each photovoltaic converter by using an improved multi-agent consistency algorithm, thereby realizing the accurate compensation of the voltage unbalance degree of all common coupling points.
本发明提供了一种分布式光伏和牵引供电协同的电压不平衡补偿方法,属于分布式光伏和牵引供电协同技术领域,包括:将电网划分为多个子区域,并针对每个子区域采取了协同补偿策略。具体来说,首先确定每个子区域内牵引供电系统补偿装置SVG和光伏场站需要输出的补偿功率,以降低电压不平衡度。接着,采用改进的多智能体一致性算法优化每个光伏场站内各个光伏变流器的补偿功率输出。在此基础上,分别计算补偿前后公共耦合点的负序电流和电压不平衡度,得到电压不平衡度的约束条件。最后,将该约束条件作为参考,利用改进的多智能体一致性算法,确定每个光伏变流器的具体补偿功率和补偿电流,从而实现对所有公共耦合点电压不平衡度的精准补偿。
Distributed photovoltaic and traction power supply coordinated voltage unbalance compensation method
一种分布式光伏和牵引供电协同的电压不平衡补偿方法
2025-02-11
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES |
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