| 引用本文: | 辛业春,李国庆,王朝斌.无功和三相负荷不平衡的序分量法补偿控制[J].电力系统保护与控制,2014,42(14):72-78. |
| XIN Ye-chun,LI Guo-qing,WANG Chao-bin.Compensation control of reactive power and three-phase unbalance load based on the method of sequence component[J].Power System Protection and Control,2014,42(14):72-78 |
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| 摘要: |
| 将静止同步补偿器（Static Synchronous Compensator,STATCOM）并入电网来补偿无功功率和配电网三相负荷不平衡。通过对称分量法和叠加原理，对配电网三相负荷不平衡情况下正序、负序等效电路进行分析，提出一种新的正、负序补偿电流叠加补偿控制方法。正序控制环采用δ-θ控制，实现配电网无功功率补偿和保持STATCOM直流侧电压稳定；负序控制环采用φ-θ控制，实现STATCOM补偿三相负荷不平衡产生的负序电流，使电网侧三相负荷保持平衡。仿真和实验结果表明，该方法可以有效地补偿电网无功功率 |
| 关键词: 电力系统 无功补偿 静止同步补偿器 负荷不平衡 对称分量法 叠加原理 |
| DOI：10.7667/j.issn.1674-3415.2014.14.012 |
| 分类号: |
| 基金项目:国家自然科学基金项目(51377016) |
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| Compensation control of reactive power and three-phase unbalance load based on the method of sequence component |
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XIN Ye-chun1,2, LI Guo-qing1, WANG Chao-bin1
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1.School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;2.School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China
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| Abstract: |
| A static synchronous compensator (STATCOM) is used into distribution grid for compensating reactive power and three- phase unbalance load for the distribution grid. According to analyzing the positive sequence equivalent circuit and negative sequence equivalent circuit under the three-phase unbalance load of distribution grid, using the symmetrical component method and superposition principle, a new cascade loop control strategy of positive sequence current and negative sequence current is proposed. Using δ-θ control, the positive sequence loop compensates reactive power of distribution grid and maintains stability of STATCOM DC voltage. Using φ-θ control in the negative sequence loop can make STATCOM compensate negative-sequence current caused by three-phase load unbalance and keep distribution grid side three-phase load balanced. Simulation and experiment results are presented to verify the validity of the proposed control strategy. |
| Key words: power system reactive power compensation static synchronous compensator unbalance load symmetrical component method principle of superposition |
