A Comprehensive Control Strategy for Three Phase Unbalance and Light and Heavy Load in Flexible Interconnected Distribution Stations Based on F-SOP
李天麟 1郭褀 1王鑫 1冀浩然 2涂春鸣 1侯玉超 1李俊豪1
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作者信息
1. 国家电能变换与控制工程技术研究中心(湖南大学),湖南省长沙市 410082
2. 智能电网教育部重点实验室(天津大学),天津市南开区 300072
折叠
摘要
随着分布式能源与随机负荷的大量接入,配电台区三相负荷不平衡与变压器轻重载运行问题日益突出,这将威胁台区安全可靠运行.然而,既有关于互联台区的研究鲜有兼顾三相不平衡与轻重载运行问题的综合治理.对此,该文提出一种基于四桥臂智能软开关(four-leg soft open point,F-SOP)的柔性互联配电台区三相不平衡与轻重载综合调控策略.首先,分析了 F-SOP和变压器的综合损耗特性,结果表明不平衡度和负载率均会影响设备运行效率;其次,建立三相不平衡与轻重载综合调控策略模型,设立变压器输出功率不平衡度与负载率的指标约束,以系统综合损耗最小为优化目标求解F-SOP最优调控指令.接着,针对F-SOP拓扑架构及其功率调控的需求,提出一种改进对等控制方法,进一步提高F-SOP稳定性能与动态性能,确保综合调控策略的实现.最后,通过算例分析与仿真实验验证了所提综合调控策略的有效性和可行性.
Abstract
.With the extensive integration of distributed energy and random loads,the problem of three-phase load imbalance and transformer light and heavy load operation in the distribution station area is becoming increasingly prominent,which will threaten the safe and reliable operation of the station area.However,existing research on interconnected substations only focuses on a single regulatory objective,and few comprehensive governance issues balance three-phase imbalance and light and heavy load operation.The article proposes a comprehensive control strategy for three-phase imbalance and light and heavy loads in the flexible interconnected distribution station area based on a four-leg soft open point(F-SOP).Firstly,the comprehensive loss characteristics of F-SOP and transformers were analyzed,and the results showed that both imbalance and load rate would affect the operational efficiency of the equipment.Secondly,a comprehensive control strategy model for three-phase imbalance and light and heavy loads must be established,indicator constraints for transformer output power imbalance and load rate established,and the F-SOP optimal control command must be solved with the optimization goal of minimizing system comprehensive loss.Next,an improved peer-to-peer control method is proposed to improve the stability and dynamic performance of F-SOP,ensuring the implementation of comprehensive control strategies,in response to F-SOP topology architecture and power regulation requirements.Finally,the effectiveness and feasibility of the proposed comprehensive control strategy were verified through numerical analysis and simulation experiments.
关键词
柔性互联配电台区/智能软开关/三相不平衡/轻重载/综合调控
Key words
flexible interconnection distribution area/soft open point/three phase imbalance/light and heavy load/comprehensive regulation
维普
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