Scheduled Maintenance on December 18, 2017:
IEEE Xplore will undergo system maintenance from 1:00 - 5:00 PM EST. During this time there may be intermittent impact on performance. We apologize for any inconvenience.

# International Conference on AC and DC Power Transmission

## Filter Results

Displaying Results 1 - 25 of 77
• ### Harmonic domain representation of thyristor controlled reactors

Publication Year: 1991, Page(s):404 - 406
Cited by:  Papers (5)
| | PDF (184 KB)

A new TCR (thyristor controlled reactor) model has been developed by linearising the state equations of the TCR in the harmonic domain. The resulting equations can be interpreted as a harmonic Norton equivalent. They can also be represented in the multiphase harmonic domain frame of reference, where they could combine easily with the frequency dependent admittances of the transmission network and ... View full abstract»

• ### A new method for avoiding overvoltages when clearing DC-line faults with a low SCR HVDC station

Publication Year: 1991, Page(s):401 - 403
| | PDF (212 KB)

Two promising variants for avoiding AC-side overvoltages at DC, line faults of low-SCT (short-circuit ratio) HVDC systems have been presented. Both use commutation switches. The first one has moderate demands on the mechanical speed of the switches, but requires further investigation on the arc extinction. The second one uses the converters to extinguish the arc, requires almost no commutation dut... View full abstract»

• ### Power flow control by use of controllable components

Publication Year: 1991, Page(s):398 - 400
| | PDF (156 KB)

The authors briefly discuss the virtues of controlling the power flow in an electric power system. A method to compute the control action needed for a required change in the output variables, i.e. the power flows on the predefined lines, is described. This method is illustrated on model systems for different purposes View full abstract»

• ### Validation of digital simulation for studies of torsional interaction between a turbo-generator and an HVDC link

Publication Year: 1991, Page(s):295 - 300
| | PDF (360 KB)

The authors describe a method and a digital tool developed to study the interactions between an AC network and synchronous machines in the frequency domain below the synchronous frequency of the power network. In particular, they consider the case of torsional interactions between a turbo-generator and an HVDC link. The proposed approach consists in dividing a heterogeneous system into homogeneous... View full abstract»

• ### Interconnection of a large hydro power plant via HVDC and AC links with two remote grids

Publication Year: 1991, Page(s):96 - 101
Cited by:  Papers (1)
| | PDF (344 KB)

The authors describe the analysis of electromechanical transients in a large hydroelectric power plant interconnected via HVDC and AC links with two separate power systems. The investigation shows the dynamic behaviour of the total interconnected system on occurrence of faults in the HVDC and AC links. Special emphasis is given to the control of frequency deviations, damping of power swings and pr... View full abstract»

• ### Analysis of power/voltage stability of HVDC converters in AC systems

Publication Year: 1991, Page(s):395 - 397
Cited by:  Papers (3)
| | PDF (132 KB)

A new approach to analysing power/voltage stability in AC/DC systems is developed. The method is based on power flows on a well-established quasi steady-state' model and complex system configurations can be analysed. In addition to traditional measures such as the effective short circuit ratio (ESCR) and dV/dQ, the smallest singular value of the power flow Jacobian is used and found to be a feasi... View full abstract»

• ### Some aspects of DC pollution tests

Publication Year: 1991, Page(s):331 - 336
| | PDF (308 KB)

The authors discuss the importance of pollution tests on DC insulators and why they are difficult to perform. They then discuss the requirements for basic test sources including voltage drop and ripple and then discuss the requirements for the test objective and test equipment View full abstract»

• ### Subsynchronous oscillation controller for Vindhyachal back-to-back HVDC link

Publication Year: 1991, Page(s):290 - 294
| | PDF (212 KB)

The Vindhyachal back-to-back HVDC link interconnects the 400 kV AC networks of the Northern and Western power in India. The phenomena of subsynchronous oscillations due to adverse interaction between turbine generator torsional modes of oscillations and an HVDC system was discovered in 1977. To avoid damage to turbine-generator sets, it is therefore necessary to get a positive damping contribution... View full abstract»

• ### Review of the design of the James Bay-Boston DC system

Publication Year: 1991, Page(s):90 - 95
Cited by:  Papers (3)
| | PDF (332 KB)

The design of the James Bay-Boston 450 kV system is a reflection of the planning and operating requirements that led to its adoption and which in turn led to constraints in its implementation. The authors take a second look at this multiterminal DC (MTDC) system and review the planning studies, the operating philosophy and the design itself View full abstract»

• ### Calculation of harmonic interference in HVDC systems with unbalance

Publication Year: 1991, Page(s):390 - 394
Cited by:  Papers (4)
| | PDF (228 KB)

A technique which is useful in analyzing the nontheoretical harmonics in the converters is the modulation theory of converters. The authors outline the basic theory and then use it to calculate the nontheoretical harmonics in HVDC systems under unbalanced AC supply conditions. The effects of the commutation overlap and the commutation impedance in the harmonic calculations have been taken into con... View full abstract»

• ### On the design, testing and operating experience of composite dry bushings in HVDC

Publication Year: 1991, Page(s):325 - 330
Cited by:  Papers (2)
| | PDF (208 KB)

As part of the ongoing attempts to solve the external flashover problem of HVDC wall bushings, Manitoba Hydro installed a 500 kV composite dry wall bushing with hydrophobic silicone rubber sheds. The bushing was installed in the negative pole (-500 kV) on the valve winding side of the high voltage converter group at the inverter (Dorsey Station). It was found that the external flashover performanc... View full abstract»

• ### Network interaction tests of the Fenno-Skan HVDC link

Publication Year: 1991, Page(s):285 - 289
| | PDF (316 KB)

The network interaction tests of the Fenno-Skan HVDC link between Finland and Sweden are described. The authors deal with the objectives, execution and analysis of the tests on the Finnish side. The purpose of the tests was to verify the compatibility of the link with the AC system. Besides this, the tests gave the possibility of verifying the quality of the system modelling. The large scale netwo... View full abstract»

• ### The Hawaii geothermal/interisland transmission project

Publication Year: 1991, Page(s):85 - 89
| | PDF (288 KB)

In May 1989, Hawaiian Electric Company, the electric utility serving Honolulu and the island of Oahu, issued a request for proposal for the purchase of electricity produced from geothermal resources on the island of Hawaii and transmitted by a combination of overhead lines and submarine cables to Oahu. The authors describe the project, with attention given to the AC and DC transmission portion. A ... View full abstract»

• ### Analysis of noncharacteristic harmonics of a large HVDC transmission system and comparison with site tests

Publication Year: 1991, Page(s):384 - 389
Cited by:  Papers (2)
| | PDF (352 KB)

The authors describe the analysis of harmonic currents on the DC line of an HVDC transmission system. For this purpose, extensive measurements were carried out on a system having a high rating. The basic parameters influencing the currents on the DC side have been theoretically studied and computer models described. The results of the measurements are compared with the results of the simulation. R... View full abstract»

• ### Digital computer studies and some test results for a static VAr compensator in the UK transmission network

Publication Year: 1991, Page(s):319 - 324
Cited by:  Patents (2)
| | PDF (364 KB)

Several SVCs of 150/-75 MVAr rating are being installed in the 400 kV transmission network in the south of England. The SVC transformer as well as the TCR, TSC and filter circuit components are subject to a variety of transient overvoltages which are limited by gapless metal oxide surge arresters. The authors describe subsequent digital studies which are used to determine the severest transient st... View full abstract»

• ### Active and reactive power controls for the Gezhouba-Shanghai HVDC transmission scheme

Publication Year: 1991, Page(s):279 - 284
Cited by:  Papers (2)
| | PDF (340 KB)

The ±500 kV, 1200 MW HVDC transmission scheme, the first in China, interconnects the Central and Eastern China regional power systems over a distance of 1045 km. The scheme, known as GESHA, was commissioned in two stages in 1989 and 1990 respectively. The authors present a brief description of the HVDC transmission scheme and its principal modes of operation and the operating environment of... View full abstract»

• ### The Amazon transmission technological challenge

Publication Year: 1991, Page(s):79 - 84
Cited by:  Papers (1)
| | PDF (332 KB)

The Brazilian power system consists of two interconnected systems. As power resources near the country's major load centers become exhausted, the transmission system will enlarge its interconnection as part of the long range expansion strategy. The energy resources to be exploited in the near future are located in the Northern region (Amazon basin), where there is great hydroelectric power potenti... View full abstract»

• ### Incorporation of FACTS into transients programs for system simulation

Publication Year: 1991, Page(s):379 - 383
| | PDF (352 KB)

Flexible AC transmission systems (FACTS) concepts rely on a rapidly controlled response to system disturbances. Accurate transient models of the device, the power system in the vicinity and FACTS controls become crucial for system studies. System studies must deploy models which extend beyond the immediate confines of the FACTS device. In other words, the requirement for detailed transient modelin... View full abstract»

• ### Design studies for the S. Tome' nack-to-back HVDC converter

Publication Year: 1991, Page(s):177 - 182
Cited by:  Papers (1)
| | PDF (384 KB)

The Sato Tome' back-to-back converter is planned as the second HVDC link to asynchronously connect the Argentina (50 Hz) and Brazil (60 Hz) transmission systems. From the date of commissioning to the year 1996, the S. Tome' converter will be connected to the respective AC networks via single AC ties. In 1996, plans call for a second 132 kV line on the Argentina side, thereby interconnecting the tw... View full abstract»

• ### Operational and high voltage tests on thyristor valves for use in a standardized BB-system

Publication Year: 1991, Page(s):417 - 420
Cited by:  Papers (1)
| | PDF (252 KB)

A new valve design for HVDC BB-systems has been subjected to type tests based on the most stringent requirements from either one of the three documents presently available in the industry. All tests were passed successfully. There was no thyristor failure and the only capacitor failure was demonstrated to be caused by a manufacturing defect. Effects of the failure were limited to the particular th... View full abstract»

• ### Numerical simulation of the Cross Channel HVDC link during AC system faults. Comparison with site test results

Publication Year: 1991, Page(s):313 - 318
Cited by:  Papers (1)
| | PDF (304 KB)

The detailed knowledge of the control and regulation circuits installed in the French end of the Cross Channel HVDC link has been used to realize a numerical model of the interconnection, the aim of which is to predict the behaviour of the combined DC link/AC system in case of various AC, fault scenarios and to avoid expensive field tests. The following validation oscillograms have shown that the ... View full abstract»

• ### Transmission line fields

Publication Year: 1991, Page(s):194 - 199
| | PDF (360 KB)

The electric and magnetic fields under 400 kV overhead lines in the UK have typical maxima of 11 kV/m and 32 A/m (40 μ T, 400 mG). The research programmes in the UK, and other countries are briefly described. The author discusses the gross effects on the body of fields, personal dosimetry, epidemiological studies and biological studies. Although some studies suggest an association between expos... View full abstract»

• ### AC and DC Power Transmission (Conf. Publ. No.345)

Publication Year: 1991
| | PDF (20 KB)

The following topics were dealt with: flexible AC transmission systems (FACTS); power system planning; wheeling; load flow; DC power transmission; multiterminal power systems; substations; EM fields; power transmission lines; static VAr compensators; reactive power compensation; power system control; testing power cables; bushings; digital simulation; and harmonics View full abstract»

• ### Integrating optical communications within the power network-the practice

Publication Year: 1991, Page(s):211 - 219
| | PDF (588 KB)

Because of the availability of all dielectric self supporting optical cables' (ADSS) offering secure interface free operation, some power utilities are now installing various forms of optical communications on their overhead transmission network, weather on AC of DC lines, for both power system control and general telecommunications duty. Based on successful trials on ADSS systems on overhead lin... View full abstract»

• ### Planning of the Gulf States interconnection

Publication Year: 1991, Page(s):38 - 43
Cited by:  Papers (3)
| | PDF (292 KB)

The authors deal with the planning studies that were carried out to determine the feasibility and nature of an interconnection of the Gulf States. The interconnection project is foreseen to be developed in three phases. The authors give a description of the member systems including generating capacity and transmission facilities. The integration of these facilities is discussed in terms of four di... View full abstract»