Adaptive Voltage Droop Control of Multiterminal VSC-HVDC Systems for DC Voltage Deviation and Power Sharing

Wang, Yizhen; Wen, Weijie; Wang, Chengshan; Liu, Haitao; Zhan, Xin; Xiao, Xiaolong

doi:10.1109/tpwrd.2018.2844330

Cited by 64 publications

(72 citation statements)

References 28 publications

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“…Voltage is one of the most important indicators of power quality, and voltage deviation is a main indicator to measure the normal operation of the power supply system [22]. Distributed photovoltaic access to the distribution network can increase the voltage of the nodes, and excessive photovoltaic output will cause some nodes to exceed the limit.…”

Section: Voltage Deviationmentioning

confidence: 99%

Location and Capacity Selection Method for Electric Thermal Storage Heating Equipment Connected to Distribution Network Considering Load Characteristics and Power Quality Management

et al. 2020

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High-permeability distributed wind power and photovoltaic systems are connected to the distribution network, which exacerbates the volatility and uncertainty of the distribution network. Furthermore, with the increasing demand of heating in winter and environmental protection, the wide use of electric thermal storage heating equipment (ETSHE) can promote distributed renewable energy utilization. However, an unplanned ETSHE connection to the distribution network may cause serious power quality problems. A new method of equipment location and capacity is proposed, which considered the improvement of power quality and load demand characteristics of the distribution network. First, based on heat load portrait technology, the node’s thermal load classification prediction was carried out to provide the data basis for the model solution. Second, the multi-objective optimal location and capacity programming model including harmonic distortion rate, voltage deviation, voltage fluctuation, and ETSHE cost was established. Then, the system nodes were preprocessed based on the sensitivity analysis method to reduce the number of installation nodes to be selected, and a feasible alternative set of installation nodes for the optimal configuration model of ETSHE could be obtained. Finally, the improved multi-objective particle swarm optimization algorithm was used to solve the model, and the data envelope analysis method was used to evaluate the power quality of each access scheme. The analysis of the numerical example shows that it can not only satisfy the user′s heat demand, but also effectively improve the power quality by rationally planning the location and capacity of ETSHE, which achieves the safe and efficient utilization of energy.

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Section: Voltage Deviationmentioning

confidence: 99%

Location and Capacity Selection Method for Electric Thermal Storage Heating Equipment Connected to Distribution Network Considering Load Characteristics and Power Quality Management

et al. 2020

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“…A typical connection structure of the four‐terminal VSC‐HVDC system, which is generally used in the onshore wind farm, is shown in Fig. . The four‐terminal VSC‐HVDC system consists of two offshore wind farms and two onshore ac grids.…”

Section: Coordinated Control Strategy For the Vsc‐mtdc Systemmentioning

confidence: 99%

Coordinated power control strategy of voltage source converter‐based multiterminal high‐voltage direct current based on the voltage‐current curve

Lin

Wang

et al. 2019

IEEJ Transactions Elec Engng

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To achieve power distribution quickly and improve the anti-interference capability of the voltage source converter-based multiterminal high-voltage direct current (VSC-MTDC) system, a coordinated control strategy based on the V-I curve is proposed in this article. The proposed control strategy includes the conventional droop control, the improved droop control, which considers the voltage dead band and fixed dc voltage control. The conventional droop control is utilized in one of the multiple converter stations, the fixed dc voltage control is adopted in the other one, and the improved droop control is applied to all of the rest converter stations. In this way, the unbalanced power will be distributed rapidly only through the conventional droop control, when the change of dc voltage is within the dead band. Meanwhile, all the droop coefficients of the improved droop control are adjusted automatically following the changes in dc current and dc voltage, and the converter stations regulate the unbalanced power coordinately, when the dc voltage is changed beyond the dead band. A model of a four-terminal voltage source converterbased high-voltage direct current (VSC-HVDC) transmission system is built in PSCAD/EMTDC, and the simulation results are presented to validate the expected performance of the proposed control strategy.

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“…However, the VSC-HVDC converter system is a high-order system. In recent years, scholars have applied sliding mode control [14][15][16][17][18], backstepping control [19][20][21][22][23], and some other control methods [24][25][26][27][28][29][30] to the study of electric power systems and high-order systems. The proportional-integral (PI) double closed-loop control method has been studied in [31,32], and Ref.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Surface Backstepping Control for Voltage Source Converter-High Voltage Direct Current Transmission Grid Side Converter Systems

et al. 2020

Electronics

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This paper studies the coordination control of active and reactive power of the voltage source converter-high voltage direct current transmission (VSC-HVDC) grid side converter. Firstly, the high-order VSC-HVDC converter system is decomposed into three subsystems by using the backstepping control method, and the control laws are designed for each subsystem to realize the control of VSC-HVDC converter systems. Secondly, the dynamic surface control method is used to deal with the problem of "explosion of complexity" in the traditional backstepping control method. Finally, the simulation results demonstrate that the VSC-HVDC converter systems can provide a certain capacity of reactive power compensation under the proposed method in this paper. In addition, the control method proposed in this paper does not require the information of the second derivative of active power and reactive power.

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Adaptive Voltage Droop Control of Multiterminal VSC-HVDC Systems for DC Voltage Deviation and Power Sharing

Cited by 64 publications

References 28 publications

Location and Capacity Selection Method for Electric Thermal Storage Heating Equipment Connected to Distribution Network Considering Load Characteristics and Power Quality Management

Location and Capacity Selection Method for Electric Thermal Storage Heating Equipment Connected to Distribution Network Considering Load Characteristics and Power Quality Management

Coordinated power control strategy of voltage source converter‐based multiterminal high‐voltage direct current based on the voltage‐current curve

Dynamic Surface Backstepping Control for Voltage Source Converter-High Voltage Direct Current Transmission Grid Side Converter Systems

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