Overvoltage phenomena in offshore wind farms following blocking of the HVDC converter

Erlich, I.; Paz, Bruna Cardoso; Zadeh, M. Koochack; Vogt, S.; Buchhagen, Christoph; Rauscher, C.; Menze, Andreas; Jung, Jochen

doi:10.1109/pesgm.2016.7741697

Cited by 21 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 (b). The saturation of the modulation index to its maximum value of 1 results in overvoltage at the offshore AC network [23][24][25], as observed in Fig. 2 (b).…”

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 84%

“…In this manner, seamless, autonomous and controlled transition of the WTCs between grid following and forming modes based on local measurements is achieved. Thus, compared with the conventional grid following control method [23][24][25] as in Fig. 2, the passive AC voltage controller avoids the saturation of the WTC controller so as to maintain the offshore AC voltage as demonstrated in Fig.…”

Section: Open Circuit Modementioning

confidence: 99%

“…The behaviors for OWF grids during DC faults in the MTDC network still need a detailed investigation. The over-voltage phenomena that arises when the offshore MMC is blocked during DC faults is studied in [23], in which the issues of uncontrolled frequency and harmonic resonance within the offshore AC grids are also highlighted.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Shi

Adam

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

In recent years, several DC fault clearance schemes have emerged, in which reduced number of fast acting DC circuit breakers (DCCBs) and AC circuit breakers (ACCBs) are used to clear DC faults. In offshore DC grids, such approach entails opening of the ACCBs that connect the wind farms to the offshore HVDC stations which control offshore AC voltages and frequencies, potentially leading to uncontrolled offshore voltage and frequency. Existing studies show that the loss of offshore converter due to blocking or sudden opening of ACCBs can cause significant over-voltage and over-frequency in the offshore AC grid, which could necessitate immediate shutdown of the wind farm. An enhanced control for wind turbine converters (WTCs) of the offshore wind farm is proposed to enable retention of AC voltage and frequency control when the offshore converter is lost, in which seamless transition of the WTCs between grid following and forming modes is facilitated. The viability of the proposed control is demonstrated in wider context of partially selective DC fault protection in an illustrative meshed DC grid, which includes detailed implementations of DC fault clearance, system restart and power transfer resumption. The presented simulation results confirm the effectiveness of the proposed WTC control in preventing excessive rise of offshore AC voltage and frequency and facilitating DC fault ride-through using reduced number of DCCBs.

show abstract

“…2 (b). The saturation of the modulation index to its maximum value of 1 results in overvoltage at the offshore AC network [23][24][25], as observed in Fig. 2 (b).…”

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 84%

Section: Open Circuit Modementioning

confidence: 99%

See 1 more Smart Citation

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Shi

Adam

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…The shown that during HVDC converter blocking, the voltage at the WT terminals may increase by 30%, and even it can spike up to 2.0 per-unit (pu) by other transient processes (Erlich, 2016). These incidents indicated the necessity of HVRT and LVRT capabilities for WTs.…”

Section: Transient Performance Testmentioning

confidence: 99%

Proposal for Generic Characterization of Electrical Test Benches for AC- and HVDC-Connected Wind Power Plants

Nouri

Göksu

Gevorgian

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. The electrical test and assessment of wind turbines (WT) are going hand in hand with standards and network connection requirements. In this paper, the latest developments in the testing of the electrical characteristics of WTs, including IEC standards, compliance test methods, and industrial test benches, are studied. In this paper, the general structure of advanced electrical test benches, including grid emulator or controllable grid interface (CGI), wind torque emulator and device under test (DUT), has been proposed to harmonize the available industrial test sites. The AC and HVDC transmission systems impose different electrical characteristics on wind power plants (WPP). HVDC connection leads to a converter-based grid, yet AC connection has different grid characteristics in terms of grid impedance, short circuit ratio (SCR), inertia, and background harmonics. Therefore, this paper recommends performing compliance tests in two divisions as AC- and HVDC-connected WTs using a converter-based CGI and emulate the corresponding AC grid for DUT. Also, this paper recommends the additional tests for the current version of IEC 61400-21-1. The additional tests consist of test options for new features of modernWTs, such as Grid-forming, system restoration, and black start capabilities, as well as emulation of different grid characteristics, such as detailed power system, inertia, SCR, and different grid connection emulations for DUT. This way, the possibility of research, development, and demonstration studies on WTs and WPPs would increase. The proposed additional tests can be implemented using the available advanced test benches by adjusting their control systems. Since most of the industrial test benches are based on converters, the characteristics of a real power system can be emulated by a CGI coupled with real-time digital simulator (RTDS) systems through high-bandwidth power-hardware-in-the-loop (PHIL) interface.

show abstract

“…The wind farm systems are reported to contain multiple resonance modes in the collector network [2] that can cause operational issues. The number of modes and their characteristics can vary as the operating configurations changes for several reasons such as: prevailing wind speed, wind direction, wake effect, availability of individual WTGs for maintenance, and the energy requirements from the main grid.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of a PMSG-Based Large Offshore Wind Farm Connected to a VSC-HVDC

Kunjumuhammed

Pal

Gupta

et al. 2017

IEEE Trans. Energy Convers.

View full text Add to dashboard Cite

This paper presents modal analysis of a large offshore wind farm using PMSG type wind turbines connected to a VSC-HVDC. Multiple resonant frequencies are observed in the ac grid of offshore wind farms. Their control is crucial for the uninterrupted operation of the wind farm system. The characteristics of oscillatory modes are presented using modal analysis and participation factor analysis. Sensitivity of critical modes to wind turbine design parameters and their impact on closed loop stability of the system are discussed. A comparison between a full wind farm model and an aggregated model is presented to show differences in the characteristics of critical modes observed in the models, and implication of using the models for stability studies It is concluded that robust control design is important for reliable operation of the system.

show abstract

Overvoltage phenomena in offshore wind farms following blocking of the HVDC converter

Cited by 21 publications

References 1 publication

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Proposal for Generic Characterization of Electrical Test Benches for AC- and HVDC-Connected Wind Power Plants

Stability Analysis of a PMSG-Based Large Offshore Wind Farm Connected to a VSC-HVDC

Contact Info

Product

Resources

About