Including the Optimization Method of High-proportion Distributed Photovoltaic Distribution Grid Subdivision Voltage Adjustment Coefficient

MO Jingshan; SONG Na; FAN Kaimin

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Electric Power Construction ›› 2025

Including the Optimization Method of High-proportion Distributed Photovoltaic Distribution Grid Subdivision Voltage Adjustment Coefficient

MO Jingshan, SONG Na, FAN Kaimin

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Abstract

[Objective] In order to improve the reactive response ability of photovoltaics and limit the problem of voltage over-limit, a subdivision-based reactive voltage adjustment coefficient optimisation method is proposed to consider a large number of distributed photovoltaics connected to the grid. [Methods] With the goal of limiting the voltage fluctuations of each node under a variety of scenarios, an optimisation model of nodes with reactive-voltage differential coefficient based on partitions is proposed, and the control model is simplified by using the characteristics of "strong coupling within the interval and weak coupling between partitions" to realise that photovoltaics can independently adjust the output of reactive according to external voltage fluctuations and make full use of the residual reactive. [Results] The simulation results of the IEEE33 node standard example show that the partition-based reactive voltage adjustment coefficient optimisation method can effectively use reactive to regulate node voltage, which is more conducive to meeting the requirements of accuracy and speed of reactive optimisation. [Conclusions] The method proposed in this article can effectively improve the voltage quality of the distribution grid nodes under a variety of different scenarios, giving full play to the photovoltaic reactive residual.

Key words

Optimization of voltage adjustment coefficient / Reactive power voltage control / Distribution network voltage / Distributed photovoltaic

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MO Jingshan, SONG Na, FAN Kaimin. Including the Optimization Method of High-proportion Distributed Photovoltaic Distribution Grid Subdivision Voltage Adjustment Coefficient[J]. Electric Power Construction. 2025

References

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