| 引用本文: | 苏晨,吴在军,窦晓波.孤岛微电网分布式P-V协调控制策略[J].电力自动化设备,2021,41(4): |
| SU Chen,WU Zaijun,DOU Xiaobo.Distributed P-V coordinated control strategy for islanded microgrid[J].Electric Power Automation Equipment,2021,41(4): |
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| 摘要: |
| 为提升有功功率分配精度和降低线路损耗，研究了一种孤岛微电网分布式有功-电压(P-V)协调控制策略。重点提出了考虑线损系数及节点电压优化量的有功分配因子设计方法，并研究了基于有功分配因子一致原则的功率分配方法。采用分布式稀疏通信网络进行信息交互，利用一致性算法得到二级控制所需的有功分配因子平均估计值和系统平均电压估计值，产生综合电压优化量完成下垂控制优化，实现孤岛微电网分布式P-V协调控制。该策略可有效兼顾线路损耗降低以及有功功率分配精度提升，控制各节点电压在合理范围内，并调节系统平均电压至额定值。最后通过MATLAB/Simulink仿真验证了所提控制策略的有效性。 |
| 关键词: 孤岛微电网 P-V/Q-f 下垂控制 分布式P-V协调控制策略 有功分配因子 一致性算法 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(51977034) |
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| Distributed P-V coordinated control strategy for islanded microgrid |
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SU Chen, WU Zaijun, DOU Xiaobo
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School of Electrical Engineering, Southeast University, Nanjing 210096, China
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| Abstract: |
| To improve the accuracy of active power allocation and reduce line loss, a distributed P-V coordinated control strategy of islanded microgrid is studied. A design method of active power allocation factor considering line loss coefficient and node voltage optimization is put forward. The power distribution method based on the consistency principle of active power allocation factor is investigated. The distributed sparse communication network is used for information exchange. According to the consensus algorithm, the average estimated value of active power allocation factor and the estimated value of system average voltage required for the secondary control are obtained. The comprehensive quantity for voltage optimization is generated to complete the droop control optimization. Therefore the distributed P-V coordinated control strategy of islanded microgrid can be realized. The proposed strategy can effectively take into account the reduction of line loss and the accuracy improvement of active power allocation, control the voltage of each node within a reasonable range, and adjust the system average voltage to the rated value. Finally, the effectiveness of the proposed control strategy is verified based on MATLAB/Simulink. |
| Key words: islanded microgrid P-V/Q-f droop control distributed P-V coordinated control strategy active power allocation factor consensus algorithm |
