基于功率跟踪算法的旋转潮流控制器功率解耦控制策略

doi:10.19595/j.cnki.1000-6753.tces.251097

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摘要旋转潮流控制器（RPFC）可对线路功率进行灵活调控,以缓解网络拥塞,实现线路潮流均衡。现有RPFC功率解耦方法在低压配电网中的动态解耦效果较差,使得其在低压配电网中的应用受限。为解决上述问题,该文开展了基于功率跟踪算法的RPFC功率解耦调节方法研究。首先,搭建了RPFC的功率调节模型,在考虑线路电阻的情况下研究了RPFC的潮流调控特性,分析了现有方法难以进行功率解耦的原因;其次,提出了基于功率跟踪算法的RPFC功率解耦控制策略,即对两个移相角施加一定扰动后,分析扰动前后线路功率的变化情况,并结合功率变化量与移相角变化量的关系确定调节方向,以此实现功率的解耦控制;最后,在380 V/40 kV·A的RPFC实验平台上对所提方法进行了实验验证。实验结果证明了所提控制策略在不同场景及线路参数下均表现出较好的功率解耦效果。

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	颜湘武
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	易兴平
	生涵竹

关键词 ：旋转潮流控制器, 功率解耦, 功率跟踪算法, 配电网, 低压线路

Abstract：With the continuous increase in the penetration of distributed generation, the operation and dispatching of distribution networks are facing unprecedented challenges. Issues such as line overloading, voltage limit violations, and increased uncertainty in power flow distribution have become increasingly prominent. These problems not only threaten the safe and stable operation of the network but also complicate the realization of efficient and reliable power supply. To address these emerging challenges, flexible and adaptive regulation technologies are urgently needed.
The Rotary Power Flow Controller (RPFC), which is an electromagnetic type of flexible AC interconnection device composed of rotary phase-shifting transformers, has been demonstrated as an effective tool for flexible regulation of distribution networks. By enabling continuous and adjustable power flow control along distribution feeders, RPFC can mitigate network congestion, redistribute line loading, and achieve balanced power flow across interconnected feeders.
Nevertheless, existing RPFC power decoupling methods, which are primarily based on instantaneous power theory, rely on the assumption that the line impedance is dominated by reactance. Under this condition, active and reactive power flows can be effectively decoupled and independently controlled. However, in low-voltage distribution feeders, the resistive component of line impedance becomes significant and cannot be neglected. This change in impedance characteristics leads to strong coupling between active and reactive power flows, thereby reducing the effectiveness of conventional decoupling methods. Consequently, the practical application of RPFC in low-voltage distribution networks is severely constrained.
To overcome the above limitation, this paper developed and investigated a novel RPFC power decoupling regulation method based on a power-tracking algorithm. First, a detailed RPFC power regulation model was established, explicitly considering the impact of line resistance. The power flow regulation characteristics of RPFC were then systematically analyzed, and the reasons why existing control strategies fail to achieve effective decoupling in low-voltage networks were explored. A quantitative analysis was carried out on the response characteristics of both active and reactive power to the two phase-shifting angles after RPFC integration. By constructing three-dimensional response surfaces and corresponding contour plots of power flow with respect to phase-shifting angles, it is revealed that active and reactive power exhibit different sensitivity patterns to the phase-shifting angles, providing a theoretical basis for the proposed method.
Building upon this observation, a new RPFC power decoupling strategy was proposed using the power-tracking algorithm. A novel variable termed “power-phase-shift-angle sensitivity” was introduced to describe the relationship between variations in power flow and changes in phase-shift angles. On this basis, the principle of power decoupling regulation was derived, and a tangent-angle solving rule as well as a complete power regulation procedure for the decoupling process were formulated. A corresponding flowchart was designed to clearly illustrate the regulation sequence. The proposed decoupling control strategy operates by applying small perturbations to the two phase-shifting angles, analyzing the variations in line power before and after perturbation, and determining the regulation direction according to the established sensitivity relationships, thereby enabling effective decoupled control of active and reactive power.
To validate the effectiveness and practical feasibility of the proposed approach, experimental studies were carried out on a 380 V/40 kVA RPFC experimental platform. The validation includes three types of tests: power setpoint variation experiments, load disturbance experiments, and power balancing experiments under multiple line parameter conditions. The experimental results consistently demonstrate that the proposed method is capable of accurately regulating power flow, achieving effective decoupling of active and reactive power, and maintaining desirable control performance even under varying network conditions.
The findings confirm the validity and robustness of the proposed control strategy, highlighting its potential for practical deployment of RPFC in low-voltage distribution networks.

Key words： Rotary power flow controller power decoupling power tracking algorithm distribution network low voltage line

收稿日期: 2025-06-23

PACS:

TM614

基金资助:中央高校基本科研业务费专项资金资助项目（2024MS110）

通讯作者: 吴炜林男,2001年生,博士研究生,研究方向为灵活交流配电系统。E-mail：wuweilin0104@163.com

作者简介: 颜湘武男,1965年生,教授,博士生导师,研究方向为新能源电力系统分析与控制、现代电力与变换、新型储能与节能等。E-mail：xiangwuy@ncepu.edu.cn

引用本文:

颜湘武, 吴炜林, 梁白雪, 闫军, 邵晨, 易兴平, 生涵竹. 基于功率跟踪算法的旋转潮流控制器功率解耦控制策略[J]. 电工技术学报, 0, (): 251097-. Yan Xiangwu, Wu Weilin, Liang Baixue, Yan Jun, Shao Chen, Yi Xingping, Sheng Hanzhu. Power Decoupling Control Strategy of Rotary Power Flow Controller Based on Power Tracking Algorithm. Transactions of China Electrotechnical Society, 0, (): 251097-.

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