城市轨道交通电力监控系统无功协调控制研究
邹大云赵佳微薛忠魏志星张长开解凯
Research on Reactive Power Coordination Control of Urban Rail Transit Power Monitoring System
ZOU DayunZHAO JiaweiXUE ZhongWEI ZhixingZHANG ChangkaiXIE Kai
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作者信息:南京南瑞继保电气有限公司， 211102， 南京
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Affiliation:NR Electric Co., Ltd., 211102, Nanjing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.05.042
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中图分类号/CLCN:U231.8
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栏目/Col:供电与能源
摘要:
［目的］城市轨道交通供电系统主要依靠110 kV主变电所SVG(静止无功发生器)或电抗器进行无功集中补偿，当前控制模式未充分考虑分散式能馈装置的无功补偿能力，易造成SVG长期重负荷运行、电抗器过补或欠补问题，因此有必要将能馈装置纳入无功补偿，并研究主变电所无功补偿设备与能馈装置的协调控制方法，以解决供电系统的无功协调控制问题。［方法］提出基于中央级电力监控系统的无功协调控制方法，将SVG、电抗器及能馈装置纳入无功控制对象，通过在线控制分区、进线功率因数控制策略、经济压差无功平衡控制策略来实现无功实时协调控制。［结果及结论］所提无功实时协调控制方法为，在中央级电力监控系统中构建无功协调控制模块，根据全线实时数据及供电系统模型，划分在线控制分区，对每个控制分区进行无功协调控制。如果进线功率因数不合格，则根据功率因数控制目标计算无功补偿量，并按照分配原则分配给无功控制对象；如果进线功率因数合格，则按照经济压差方法进行无功平衡协调控制。通过上述协调控制方法能够达到降低SVG补偿容量、满足进线功率因数考核及降低供电系统有功损耗的目的。
Abstracts:
［Objective］
The power supply system of urban rail transit mainly relies on the SVG (static var generator) or reactors in the 110 kV main substation for centralized reactive power compensation. The current control mode does not fully consider the reactive power compensation capacity of the decentralized energy feedback devices, easily leading to problems such as long-term heavy-load operation of the SVG, over-compensation or under-compensation of the reactors. Therefore, it is necessary to incorporate the energy feedback devices into reactive power compensation and study the coordinated control method of the reactive power compensation equipment in the main substation and the energy feedback device, so as to solve the problem of reactive power coordinated control in the power supply system.
［Method］
A reactive power coordinated control method based on the central-level power monitoring system is proposed. With the SVG, reactors, and energy feedback devices introduced into the reactive power control objects, the real-time reactive power coordinated control is achieved through online control zoning, incoming line power factor control strategy, and economic voltage difference reactive power balance control strategy.
［Result & Conclusion］
The proposed real-time reactive power coordinated control method is to construct a reactive power coordinated control module in the central-level power monitoring system. According to the real-time data of the whole line and the power supply system model, online control zones are partitioned, and reactive power coordinated control is performed for each control zone. If the incoming line power factor is unqualified, the reactive power compensation amount is calculated according to the power factor control target and allocated to the reactive power control objects according to the allocation principle. If the power factor is qualified, the reactive power balance coordinated control should be carried out according to the economic voltage difference method. Through the above coordinated control methods, the objectives of reducing the compensation capacity of the SVG, meeting the incoming line power factor assessment, and reducing the active power loss of the power supply system can be achieved.
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