A method for reducing harmonics in output voltages of a double-connected inverter

Masukawa, Shigeo; Iida, Shoji

doi:10.1109/63.321039

Cited by 22 publications

(6 citation statements)

References 5 publications

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“…Their influence on station design and performance is assessed with reference to the ac-dc system strength, a relative term which is generally expressed by the SCR, i.e., the ratio of the ac-system short-circuit capacity to dc-link power. [9][10][11][12][13][14][15] The following SCR values can be used to classify ac systems: 12 ͑i͒ a strong ac system is categorized by SCRՆ 3, ͑ii͒ a weak ac system is categorized by 2 Յ SCRϽ 3, and ͑iii͒ a very weak ac system is categorized by SCRϽ 2.…”

Section: Introductionmentioning

confidence: 99%

A robust control algorithm based high voltage direct current system connected to a weak ac grid

Kumar¹,

Bansal

Joshi³

2009

Journal of Renewable and Sustainable Energy

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During various faults in a high voltage direct current ͑HVDC͒ system, the voltage gets reduced, which in turn results into commutation failure, which can deteriorate the availability of HVDC links and thus affect the performance of the power system. In this paper, efforts are made to ride through these faults and so to lower the effect of commutation failure on the power system, and the remedy is implemented by using a robust control algorithm which utilizes a new space vector modulationbased strategy. The validity and effectiveness of the control algorithm are verified by PSCAD/EMTDC-based simulation which shows that with the proposed control, the system can operate steadily, has the capability to restore steady state condition when short-circuit fault occurs, and is feasible technically and obvious in advantages. NOMENCLATURE ␥Extinction angle ␣ Firing angle Overlap angle Angular frequency I d dc load current I dN Rated dc U VN Rated phase-to-phase voltage on the valve or secondary side of the converter transformer U D Operating direct voltage across the converter bridge V a , V b , and V c Three-phase commutation voltages V alpha and V beta DQ axis voltages Xc Commutation reactance S N Converter transformer rating P d Power flowing through the bridge Power factor angle L T1 Equivalent inductance of commuting transformer N Harmonic order Angular frequency of fundamental harmonic U LN Primary side rated phase-to-phase ac bus voltage U VN Rated secondary ͑dc valve side͒ voltage T RN Nominal turn ratio of the converter transformer V DR Rectifier dc voltage V DI Inverter dc voltage I DR Rectifier dc a͒ Electronic

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Section: Introductionmentioning

confidence: 99%

A robust control algorithm based high voltage direct current system connected to a weak ac grid

Kumar¹,

Bansal

Joshi³

2009

Journal of Renewable and Sustainable Energy

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“…In order to solve the weak point of the above method, a method to insert an auxiliary circuit in the DC link side was proposed by several researchers [4]. The auxiliary circuit, which consists of a mid-tap transformer and a fullbridge inverter, generates a three-level step that is superposed to the DC capacitor voltage to reduce the harmonic level of the output voltage.…”

Section: Introductionmentioning

confidence: 99%

18-step Back-to-Back Voltage Source Converter with Pulse Interleaving Circuit for HVDC Application

Lee¹,

Jeong²,

Lee³

et al. 2010

Journal of Electrical Engineering and Technology

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-This paper proposes an 18-step back-to-back (BTB) voltage source converter using four sets of 3-Level converter modules with auxiliary circuits to increase the number of steps. The proposed BTB voltage source converter has the independent control capability of active power and reactive power at the interconnected ac system. The operational feasibility of the proposed BTB converter was verified through many simulations with PSCAD/EMTDC software. The feasibility of hardware implementation was verified through experimental results with a scaled hardware prototype. The proposed BTB converter could be widely applied for interconnecting the renewable energy source to the power grid.

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“…In order solve the weak point of the above method, a method to insert an auxiliary circuit in the DC link side was proposed by several researcher [4]. The auxiliary circuit generates three-level pulse that is superposed to the DC capacitor voltage for reducing the harmonic level of output voltage.…”

Section: Introductionmentioning

confidence: 99%

New configuration of 36-pulse voltage source converter using pulse-interleaving circuit

Han

Choo

Choi

et al. 2005

2005 International Conference on Electrical Machines and Systems

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This paper proposes a new configuration of 36-pulse voltage source converter, composed of two 6-pulse bridges and a pulseinterleaving auxiliary circuit. The coniterter topology was devised to increase the number of pulses of the output voltage without increasing the number of 6-pulse bridges and coupling transformers. The operational feasibility of proposed svstem was verified by computer simulations with PSCAD / EMTDC software and experimental works With 2kVA hardware prototype. The proposed converter can be widely used for the power quality compensator and the distributed power generation, such as solar and fuel cell power system.

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A method for reducing harmonics in output voltages of a double-connected inverter

Cited by 22 publications

References 5 publications

A robust control algorithm based high voltage direct current system connected to a weak ac grid

A robust control algorithm based high voltage direct current system connected to a weak ac grid

18-step Back-to-Back Voltage Source Converter with Pulse Interleaving Circuit for HVDC Application

New configuration of 36-pulse voltage source converter using pulse-interleaving circuit

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