Study on Dynamic Stability, Commutation Failure of Multi-Infeed HVDC Power Transmission System

Wang, Zhi Dong; Liu, Lian Guang

doi:10.4028/www.scientific.net/amr.347-353.2717

Cited by 4 publications

(5 citation statements)

References 5 publications

(8 reference statements)

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“…In [3], Node impedance matrix elements are used to describe the effect of DC links, and in [4], the change rate of voltage at converter buses after reactive power disturbance is applied to indicate the interactions between them. Reference [8] proves the consistency of these two definitions based on a decoupled model of MIDC system and gives the index of MISCR for determining the strength of receiving-end AC system.…”

Section: Introductionmentioning

confidence: 82%

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A Voltage Stability Analysis Method of Multi-infeed HVDC Power Systems

Shao¹,

Tang

Zhang

et al. 2014

Journal of International Council on Electrical Engineering

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-According to the Chinese power network planning, the risk of voltage instability at the receiving-end AC power system will be increased significantly, where there will be more HVDC systems feeding into a same AC grid in the future. At present, the effective voltage stability analysis methods of multi-infeed DC (MIDC) system are few, the most widely used method with most research results is the multi-infeed short-circuit ratio (MISCR) index at home and abroad. The deficiency of MISCR index is pointed out. The relationship between multi-infeed interaction factor (MIIF) and the voltage stability of the receiving-end AC system is discussed. Then a new method joint MIIF and MISCR indexes to evaluate the voltage stability of MIDC system is put forward. Finally, simulation tests and analysis results of a large actual grid prove the feasibility and good performance of the proposed new method.

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Section: Introductionmentioning

confidence: 82%

“…Based on the value of multi-infeed critical SCR (MCSCR) and the indexes of SCR proposed by IEEE, reference [8] recommends indexes of MSCR as follows: (1) very weak system: MSCR i <2; (2) weak system: 2<MSCR i <3; (3) strong system: MSCR i >3.…”

Section: Evaluation Index For Determining the Strength Of The Receivimentioning

confidence: 99%

A Voltage Stability Analysis Method of Multi-infeed HVDC Power Systems

Shao¹,

Tang

Zhang

et al. 2014

Journal of International Council on Electrical Engineering

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show abstract

“…After commutation failure, the pole control of inverter would enhance margin of commutation by decreasing firing angle, increasing advance firing angle. At the same time, when the DC voltage decreases to a threshold, the Voltage Dependent Current Limiter (VDCL) would take effect to decrease reference value of DC current and to restore normal commutation quickly [14]. To avoid commutation failure which leads by loss of firing pulse, pole control would switch after commutation failure 200ms.…”

Section: Control System Response After Commutation Failurementioning

confidence: 99%

The Summary of HVDC Commutation Failure and Example Analysis

Wang

2013

AMM

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Commutation Failure is the common fault of HVDC, continuous commutation failure may lead to HVDC block and affect the stability of the power system. Especially in southern power grid, china, its special that the end of four HVDC system are all in Guangzhou. If the AC system occurs serious fault, all of the HVDC system may occur commutation Failure, HVDC block, even occurs large area blackout. So how to avoid continuous commutation failure and restore the stability of HVDC is important for AC and DC parallel power system. This paper based on the mechanism of commutation failure, analyze the reason of commutation failure and identification method, preventive measures. At last, this paper uses actual recorded wave to analyze the diversification of system after commutation failure.

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“…According to the simulation results, the commutation failure probability is obtained. If the probability is greater than 50%, the critical voltage is considered effective [8].…”

Section: Realization Proceduresmentioning

confidence: 99%

Combined Simulation Based Commutation Failure Analysis in HVDC Systems

Liu

2011

AMR

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Commutation failures may lead to serious consequences such as DC blocks. A simulation method of joint using the electromagnetic transient program and the electromechanical transient program is presented to analyze commutation failures. This method is realized in two steps. Firstly, the commutation failure critical voltage under a certain operating condition is determined with PSCAD/EMTDC. Secondly, this critical voltage is used in PSS/E, an electromechanical transient program, to analyze commutation failures of AC-DC systems. Using the proposed method, the effect of AC faults on commutation failures of a practical DC link in China is analyzed. Voltage contours is also utilized to improve the visualization of commutation failures. The combined simulation method, which gives consideration to both the simulation accuracy and the simulation efficiency, is beneficial to better analyze commutation failures of large-scale power systems.

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Study on Dynamic Stability, Commutation Failure of Multi-Infeed HVDC Power Transmission System

Cited by 4 publications

References 5 publications

A Voltage Stability Analysis Method of Multi-infeed HVDC Power Systems

A Voltage Stability Analysis Method of Multi-infeed HVDC Power Systems

The Summary of HVDC Commutation Failure and Example Analysis

Combined Simulation Based Commutation Failure Analysis in HVDC Systems

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