Improved direct power control of a grid-connected voltage source converter during network unbalance

Zhou, Peng; Zhang, Wei; He, Yikang; Zeng, Rong

doi:10.1631/jzus.c0910702

Cited by 7 publications

(8 citation statements)

References 18 publications

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“…Compared with the conventional DPC scheme [12,13], both d and q axes components must be taken into account due to no accurate orientation of the voltages or the flux linkages. Meanwhile, it can be regarded as an extended mathematical model of the …”

Section: Iet Power Electronicsmentioning

confidence: 99%

“…It is worth noting that the proposed DPC scheme eliminates both the sequential separations of the voltages/currents and the complex calculations of the power compensating components, compared with the solutions in [10][11][12][13]. Meanwhile, it eliminates the PLL and its potential low-frequency-oscillatory behaviours.…”

Section: System Designmentioning

confidence: 99%

“…To develop the performance of the DPC scheme, different solutions have been proposed and reported. In [10][11][12][13], the required power compensating components on the basis of the selected control targets were added into the commanded values of the active and reactive powers. However, the power compensating components were calculated on the basis of the positive and negative sequence voltages/currents.…”

Section: Introductionmentioning

confidence: 99%

“…The sequential separations of the measured voltages and currents were still involved. As discussed in [12, 13], when both the active and reactive powers are controlled to be constant, the third‐order harmonic currents are injected into grid, which might not be met in some standards such as IEEE 519‐1992 and GB/T 14549‐1993. Consequently, in [14], an intermediate solution, that is, smooth active (or reactive) power with sinusoidal line currents, was designed.…”

Section: Introductionmentioning

confidence: 99%

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Direct power control of voltage source inverter in a virtual synchronous reference frame during frequency variation and network unbalance

Cheng¹,

Nian²

2016

IET Power Electronics

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This study proposes a direct power control (DPC) scheme for grid-connected voltage source inverter (VSI) in a virtual synchronous reference frame during frequency variations and network unbalances. The proposed DPC scheme applies a virtual phase angle instead of the voltage phase angle acquired by the phase-locked loop (PLL) for coordinated transformations. This approach can eliminate the PLL and its low-frequency-oscillatory behaviours during the frequency variations. Meanwhile, two available control targets, that is, smooth active power and smooth reactive power, are defined for the VSI operation during network unbalance. In the proposed DPC scheme, the reduced-order vector integrator is employed to directly regulate the power pulsations caused by the voltage unbalances. Consequently, it can eliminate both the sequential separations of the voltages/currents and the complex calculations of the power compensating components. Then, based on the mathematical model of the VSI control system, the control performance, including the steady-state power errors and the system stability, is fully analysed. Finally, both the simulation and experimental results are provided to confirm the effectiveness of the proposed DPC scheme.

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Section: Iet Power Electronicsmentioning

confidence: 99%

Section: System Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct power control of voltage source inverter in a virtual synchronous reference frame during frequency variation and network unbalance

Cheng¹,

Nian²

2016

IET Power Electronics

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show abstract

“…These techniques directly control the machine flux and torque by selecting appropriate voltage vectors [13][14][15]. It has been reported in the literature that DPC is better in terms of efficiency compared to the modified DTC technique [16][17][18]. Nonetheless, the DPC technique also needs the machine parameter estimation and a protection system for avoiding fault overcurrent.…”

Section: Introductionmentioning

confidence: 99%

State‐space modelling of an interconnected system of renewable energy sources and grid for rural electrification

Bhamu

Bhatti

2019

IET Energy Systems Integration

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This study deals with the development of a state-space model for an interconnected system of renewable energy sources (RES) with grid. The RES technologies considered for power generation in the interconnected system are doubly fed induction generator (DFIG) based wind energy conversion system and biogas genset. A linearised model for DFIG has been developed for the system. For biogas genset, the control of frequency and voltage is taken care by the electronic speed governor and IEEE type-I excitation system, respectively. The interconnected system takes a fixed feed of power supply from the grid and the rest of the consumer load is taken care by the RES. Finally, state feedback controllers have been developed for this interconnected system which maintains the active and reactive power balance between different sources of RES when small signal perturbations are given in load and input wind power. The comparative analysis has also been performed with the conventional PI controllers in order to demonstrate the superiority of proposed feedback controllers for the interconnected power system.

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Dual feedback linearization control of three-phase pulse-width-modulation voltage-source rectifier based on direct power control

Zhou

Guo

Zhang

et al. 2012

Proceedings of the 7th International Power Electronics and Motion Control Conference

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Improved direct power control of a grid-connected voltage source converter during network unbalance

Cited by 7 publications

References 18 publications

Direct power control of voltage source inverter in a virtual synchronous reference frame during frequency variation and network unbalance

Direct power control of voltage source inverter in a virtual synchronous reference frame during frequency variation and network unbalance

State‐space modelling of an interconnected system of renewable energy sources and grid for rural electrification

Dual feedback linearization control of three-phase pulse-width-modulation voltage-source rectifier based on direct power control

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