Model predictive control of MMC-UPFC under unbalanced grid conditions

Yang, Qiufan; Ding, Ting; He, Hengxin; Xia, Changliang; Tao, Fengbo; Zhou, Zhicheng; Xu, Yundou; Chen, Shu

doi:10.1016/j.ijepes.2019.105637

Cited by 20 publications

(16 citation statements)

References 24 publications

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“…In 2020, Qiufan Yang et al [3], developed an MPC technique to deal with the control flow of the power is unbalanced grid states for the Standard MMC-UPFC. For MMC-UPFC, the predictive designs which correlate to the discrete-time designs were determined.…”

Section: Literature Reviewmentioning

confidence: 99%

Hybrid OBL-GO Algorithm to Support Damping Oscillations in Coordinated Control of UPFC and TCSC

S¹

2020

JCMPS

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When controlling the stability of the power system, a suitable oscillation damping is a forthcoming major demand. Usually, this oscillation takes place owing to the variation established, while two systems are interlinked. Moreover, this work focuses on the oscillation resulted in the power system as the primary demand that hence acts as valid experimentation in the 68-bus system. Here, it develops a satisfactory CC with two FACTS devices like Unified power flow controller (UPFC) and Thyristor Controlled Series Capacitors (TCSC) that are associated with Power System Stabilizer (PSS). Significantly, it uses the Hybrid OBL-GOA approach to set up the CC between the FACTS devices. To the later of the experimentation, this work evaluates the performance of the proposed model with existing optimizations such as Gravitational Search Algorithm (GSA), Artificial Bee Colony (ABC), Particle Swarm Optimization (PSO), and Genetic Algorithm (GA), approach to set up the CC. Significantly, it requires a comprehensive study on the effect of loading aspects and PSS in CC. Consequently, the Hybrid Opposition Based Learning (OBL)-Grasshopper Optimization Algorithm (GOA)-CC performance controls against the stable power system with dynamic oscillations damping, subsequent to the evaluation of the proposed model over the conventional approaches.

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Section: Literature Reviewmentioning

confidence: 99%

Hybrid OBL-GO Algorithm to Support Damping Oscillations in Coordinated Control of UPFC and TCSC

S¹

2020

JCMPS

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“…It also presented a voltage limit control to protect the device from overmodulation. Recently Yang et al introduced a model predictive control scheme for the MMC-UPFC under unbalanced conditions [18]. The paper claimed that UPFC can be controlled flexibly by regulating the reference power factor in a cost function.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Control of a Modular Multilevel Cascaded Converter-Based Unified Power Flow Controller

Huang

Zhang

Oghorada

et al. 2021

IEEE Trans. on Ind. Applicat.

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This paper presents a novel configuration for a unified power flow controller (UPFC) comprising a modular multilevel cascaded converter (MMCC) with a full-bridge inverter. The MMCC has one end of each phase-leg shunt-connected to the transmission line. The other end connects in parallel to the primary terminals of a series line transformer, and the ac output terminals of a full-bridge dc-ac inverter. The submodules in the MMCC are full-bridge flying capacitor converters. This UPFC is compared to another type of MMCC-UPFC which uses double-star configuration, and submodules of half-bridge chopper type; this is referred to as the Double Star Chopper Cells UPFC (DSCC-UPFC). The comparison is in terms of footprint, cost and performance. The new topology is lighter, more efficient and cheaper than the DSCC. Its operating principle and control scheme, which combines the regulation of voltage and of transmission line power flow, are presented. Simulation studies for the proposed MMCC-UPFC realising power flow control in a dual voltage sourced power network are presented and show good performance under varying operation conditions. The paper also evaluates the power control margins of this device.

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“…Meanwhile, plenty of researches have been done on VSC and MMC operation under unbalanced grid conditions (Li et al, 2018;Shang et al, 2019;Kryonidis et al, 2021). The multiple objective control method (Stefanov and Stankovic, 2002), modeling and operation analysis of UPFC with unbalanced conditions (Yang et al, 2020), the methods of the fault ride improvement of MMC-UPFC (Santos et al, 2014) have been discussed widely. An arm current balancing control and capacitor voltage reduction method for MMC-UPFC under unbalanced grid conditions are proposed in (Li et al, 2019) and (Wang et al, 2019) respectively.…”

Section: Introductionmentioning

confidence: 99%

Passive Sliding Mode Controlled UPFC and its Treatment Strategy of Unbalanced Grid Conditions

et al. 2021

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Modular multilevel converter based unified power flow controller (MMC-UPFC) can provide flexible power regulation and plays an important role in the smart grid and future distribution networks. PI controller is widely adopted in the Unified power flow controller (UPFC) control. However, it is often difficult to figure out a pair of stable control parameters with good dynamic performance. A passive sliding mode control strategy of MMC-UPFC is proposed in this paper to achieve the advantages of both the passive controller and sliding mode controller. The proposed passive sliding mode control strategy has a fast response speed and is not sensitive to system parameter variation. Since unbalance grid voltage conditions are common in the modern distribution networks, an unbalanced grid treatment strategy is also presented with the series side of MMC-UPFC. Negative sequence components of the grid voltages are detected by the cross-decoupling method with second order generalized integrator and then compensated by the series side of MMC-UPFC. The series side converter controls the power flow and treats unbalanced grid conditions simultaneously. The efficiency of the general device is increased thus. A 27-level MMC-UPFC simulation system is built based on the Shanghai UPFC Project and validate the proposed approach.

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Model predictive control of MMC-UPFC under unbalanced grid conditions

Cited by 20 publications

References 24 publications

Hybrid OBL-GO Algorithm to Support Damping Oscillations in Coordinated Control of UPFC and TCSC

Hybrid OBL-GO Algorithm to Support Damping Oscillations in Coordinated Control of UPFC and TCSC

Analysis and Control of a Modular Multilevel Cascaded Converter-Based Unified Power Flow Controller

Passive Sliding Mode Controlled UPFC and its Treatment Strategy of Unbalanced Grid Conditions

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