Influence of the AC system faults on HVDC system and recommendations for improvement

Zhu, Tianhua; Wang, Chao; Zhang, Jing

doi:10.1109/pes.2009.5275638

Cited by 10 publications

(5 citation statements)

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“…In Figure 7, the behavior of the system when line-line-line to ground LLLG fault occurs on the AC side of the inverter section is studied. Under this condition, the AC voltage at the converter terminals is collapsed to zero and as per the grid operation standards [19,20], the DC bus needs to be maintained for two cycles of the input AC. Figure 7 shows the response of the V dc1 .…”

Section: Resultsmentioning

confidence: 99%

“…Modulus optimum (MO) method is the conventional optimization method that is widely used to tune the PI control loops for grid-connected voltage source converters [19,20]. The important thing to consider when designing PI controllers using the MO method is to ensure that the magnitude of the closed-loop transfer function is kept close to unity or 0 dB over a large range of frequencies.…”

Section: Controller Tuning By Conventional Modulus Optimum Methodsmentioning

confidence: 99%

“…These small-time constants can be added to obtain an equivalent time constant. The details of tuning the PI controllers for grid-connected are given in [19,20]. The design procedure is briefly discussed as follows; if the transfer function of a system consists of one large time constant, T L , and three small time constants T 1 , T 2 , and T 3 , the open-loop transfer function can be written as in (13)…”

Section: Controller Tuning By Conventional Modulus Optimum Methodsmentioning

confidence: 99%

“…Tuning based on optimization algorithms like particle swarm optimization (PSO) [15][16][17] and genetic algorithm (GA) [18] and have been reported in the past. In [19], PSO is applied for multiterminal DC grids and it demonstrates a better performance of PSO over classical tuning. In these, a linearized and simplified model is used for tuning the controllers as it results in fast convergence.…”

Section: Structure Of Bidirectional Vsc-based Hvdc Light Systemmentioning

confidence: 99%

“…The novelty of the present paper is to embed the PSO algorithm in the controller design steps directly on the Simulink model, which include the detailed model of the switches and the nonlinear components of the power system. The existing PSO methods [15,[19][20][21] use approximated model of the converters. Therefore, the proposed approach results in a more realistic representation of the actual system.…”

Section: Structure Of Bidirectional Vsc-based Hvdc Light Systemmentioning

confidence: 99%

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Time Domain Particle Swarm Optimization of PI Controllers for Bidirectional VSC HVDC Light System

2020

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This paper proposes a novel technique to tune the PI controllers of a bidirectional HVDC light system by embedding particle swarm optimization directly in the Simulink model in the design procedure. The HVDC light system comprises of a rectifier station, a DC link, and an inverter station. Each converter station requires four PI controllers to be tuned in the decoupled d-q vector control scheme, and with the bidirectional HVDC system, the required PI controllers are doubled. Tuning these many controllers using conventional methods is a challenging task, especially if the parameters of the converter stations are different. A novel approach to tune the PI controllers for a bidirectional HVDC system using the time-domain performance indices is presented in this paper. The time-domain performance indices are optimized using the particle swarm optimization (PSO) algorithm. The results of the proposed tuning method show that the proposed method not only gives superior results but also is less cumbersome to tune compared to conventional methods like modulus optimum (MO).

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Section: Resultsmentioning

confidence: 99%

Section: Controller Tuning By Conventional Modulus Optimum Methodsmentioning

confidence: 99%

Section: Controller Tuning By Conventional Modulus Optimum Methodsmentioning

confidence: 99%