Adaptive reclosing strategy for the mechanical DC circuit breaker in VSC-HVDC grid

Li, Bin; Mao, Qiyang; He, Jiawei; Li, Ye; Wu, Tonghua; Dai, Wei; Li, Xindong; Yu, Qingyuan

doi:10.1016/j.epsr.2020.107008

Cited by 13 publications

(10 citation statements)

References 27 publications

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“…The inverter operation at the minimal extinction angle is performed by the inverter control mode to reduce the reactive energy dissipation and harmonic level [42]. (1) VSC-HVDC MODEL The VSC-based HVDC system has provided numerous benefits in comparison to LCC-HVDC including harmonic content material, impartial control of active and reactive power, and limited black-start functionality [43][44][45][46]. The functional capability of VSC-HVDC is explained using a half-bridge modular multilevel converter (MMC) [47][48][49].…”

Section: Dynamic Avm Of Hvdc Systemsmentioning

confidence: 99%

Dynamic Modeling of HVDC for Power System Stability Assessment: A Review, Issues, and Recommendations

et al. 2021

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High-voltage direct current (HVDC) has received considerable attention due to several advantageous features such as minimum transmission losses, enhanced stability, and control operation. An appropriate model of HVDC is necessary to assess the operating conditions as well as to analyze the transient and steady-state stabilities integrated with the AC networks. Nevertheless, the construction of an HVDC model is challenging due to the high computational cost, which needs huge ranges of modeling experience. Therefore, advanced dynamic modeling of HVDC is necessary to improve stability with minimum power loss. This paper presents a comprehensive review of the various dynamic modeling of the HVDC transmission system. In line with this matter, an in-depth investigation of various HVDC mathematical models is carried out including average-value modeling (AVM), voltage source converter (VSC), and line-commutated converter (LCC). Moreover, numerous stability assessment models of HVDC are outlined with regard to stability improvement models, current-source system stability, HVDC link stability, and steady-state rotor angle stability. In addition, the various control schemes of LCC-HVDC systems and modular multilevel converter- multi-terminal direct current (MMC-MTDC) are highlighted. This paper also identifies the key issues, the problems of the existing HVDC models as well as providing some selective suggestions for future improvement. All the highlighted insights in this review will hopefully lead to increased efforts toward the enhancement of the modeling for the HVDC system.

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Section: Dynamic Avm Of Hvdc Systemsmentioning

confidence: 99%

Dynamic Modeling of HVDC for Power System Stability Assessment: A Review, Issues, and Recommendations

et al. 2021

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“…ρ(xy)< ρ set (10) where x 1i and x 2i are the instantaneous values of the positive and negative currents collected, respectively; x ˉ1 and x ˉ2 are the average values of the positive and negative currents collected, respectively; and ρ set is the setting value, which is selected as 0.9.…”

Section: B Distinguishing P-g and P-p Faultsmentioning

confidence: 99%

“…A multi-terminal flexible DC distribution network with MBLs described in [10] is simulated based on the PSCAD/ EMTDC, whose topology and parameters are shown in Fig. 15 and Tables I and II.…”

Section: Simulation Testsmentioning

confidence: 99%

“…And a reclosing strategy is proposed for a direct current circuit breaker (DCCB) to reduce the probability of equipment being damaged in the system. The same logic scheme can also be applied to mechanical DCCBs [10]. In [11], a sequential switching strategy is proposed for hybrid DCCBs (HDC-CBs), which effectively reduces the peak fault current, overvoltage, and fault clearance time.…”

Section: Introductionmentioning

confidence: 99%

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Non-permanent Pole-to-pole Fault Restoration Strategy for Flexible DC Distribution Network

Duan

Lü

et al. 2021

Journal of Modern Power Systems and Clean Energy

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As the structures of multiple branch lines (MBLs) will be widely applied in the future flexible DC distribution network, there is a urgent need for improving system reliability by tackling the frequent non-permanent pole-to-pole (P-P) fault on distribution lines. A novel fault restoration strategy based on local information is proposed to solve this issue. The strategy firstly splits a double-ended power supply network into two single-ended power supply networks through the timing difference characteristics of a hybrid direct current circuit breaker (HDC-CB) entering the recloser. Then, a method based on the characteristic of the transient energy of fault current is proposed to screen the faulty branch line in each single-ended power supply network. Also, a four-terminal flexible DC distribution network with MBLs is constructed on PSCAD to demonstrate the efficacy of the proposed strategy. Various factors such as noise, fault location, and DC arc equivalent resistance are considered in the simulation model for testing. Test results prove that the proposed strategy for fault restoration is effective, and features high performance and scalability.

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“…In addition, before the MMC is blocked, it can be equivalent to an RLC circuit shown as R MMC – L MMC – C MMC . Assuming the number of modules in MMC is N , the sub‐module equivalent resistor is R SM , the inductance of bridge arm is L SM , and the sub‐module capacitance is C SM , R MMC , L MMC , C MMC can be expressed as R MMC = 2 NR SM /3, L MMC = 2 L SM /3, C MMC = 6 C SM / N , respectively [21].…”

Section: Natural‐frequency Characteristics Of DC Fault Travelling Wavementioning

confidence: 99%

The improved fault location method for flexible direct current grid based on clustering and iterating algorithm

et al. 2021

IET Renewable Power Gen

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The fault location method based on the natural frequency of the fault travelling wave has outstanding superiority in high-voltage dc system, because of high operation speed, acceptable sampling rate, and so on. However, in flexible dc grid, the natural-frequency characteristic is quite different from that in conventional high-voltage dc system, meaning the existing fault location method cannot be directly used. This paper analyses the distance-frequency characteristics in different stages of fault period (from fault occurrence to fault isolation) in flexible dc grid, to find a suitable stage for fault location. On the basis of this, the improved fault location method based on clustering and iterating algorithms is proposed. Compared with the traditional method which directly uses the multiple signal classification algorithm to estimate the natural frequency for fault location, the proposed method can effectively eliminate the large error caused by signal dimension fluctuation and false spectrum peak of multiple signal classification algorithm. Finally, simulation cases are carried out to prove the feasibility and superiority of the proposed method.

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Adaptive reclosing strategy for the mechanical DC circuit breaker in VSC-HVDC grid

Cited by 13 publications

References 27 publications

Dynamic Modeling of HVDC for Power System Stability Assessment: A Review, Issues, and Recommendations

Dynamic Modeling of HVDC for Power System Stability Assessment: A Review, Issues, and Recommendations

Non-permanent Pole-to-pole Fault Restoration Strategy for Flexible DC Distribution Network

The improved fault location method for flexible direct current grid based on clustering and iterating algorithm

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