含高比例光—储单元的主动配电网并网功率分布式协同控制策略
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TM72

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国网河南省电力公司科技项目(52176020000P)


Distributed cooperative control strategy for grid-connected power in ADN with high proportion of PV-ESS units
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    摘要:

    针对含高比例光—储单元的主动配电网,提出一种跟踪并网点(PCC)处功率参考值的分布式协调控制策略,以缓解光伏出力曲线与本地负荷曲线不一致所导致的电压越限问题。首先,该策略根据配网PCC处功率参考值与实际值的差值产生光—储单元负荷率变化量的参考值;然后,利用牵制一致性算法分别调节储能和逆变器的有功/无功负荷率,实现功率按比分配,并保证配网PCC处功率跟踪参考值;最后,引入平均一致性算法计算系统平均SOC,各储能单元结合自身SOC对有功参考值进行修正,实现不同储能单元间SOC的均衡控制。在Matlab/Simulink软件中搭建包含分布式光—储单元的配电网仿真系统,仿真结果验证所提方法的有效性。

    Abstract:

    For active distribution networks (ADN) with a high proportion of photovoltaic-energy storage system (PV-ESS) units, a distributed coordinated control strategy is proposed to track the power reference value at the grid connection point (PCC) in this paper. The voltage violations caused by the mismatch between photovoltaic output curves and local load curves can be mitigated. Firstly, the strategy generates the reference value of the change in the PV-ESS units' load rates based on the power difference between the reference value and the actual value at the distribution network PCC. Then, a pining consensus algorithm is utlized to adjust the active/reactive load rates of ESS and inverter. A proportional based power distribution is achieved and the power at the PCC of ADN can track the reference value. In addition, an average consensus algorithm is introduced to calculate the average SOC of the system, and each ESS corrects the power reference according to its SOC to achieve the balanced control of SOC. Finally, a simulation ADN system containing PV-ESS units is built in Matlab/Simulink software to verify the effectiveness of the proposed strategy.

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张克勇,王冠瑞,耿新,贾子昊,李晓航,申亚涛.含高比例光—储单元的主动配电网并网功率分布式协同控制策略[J].电力科学与技术学报,2022,(2):147-155. ZHANG Keyong, WANG Guanrui, GENG Xin, JIA Zihao, LI Xiaohang, SHEN Yatao. Distributed cooperative control strategy for grid-connected power in ADN with high proportion of PV-ESS units[J]. Journal of Electric Power Science and Technology,2022,(2):147-155.

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  • 在线发布日期: 2022-05-26
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