HVdc Transmission - Revision history

Dchapman: /* Upgrades */ spelling

2025-03-14T16:12:54Z

Upgrades: spelling

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	Bipole II first stage was completed in October 1978. The second stage was completed in May 1985. Development of the bipoles was staged with development of generation. Kettle was completed in 1974, Long Spruce in 1979 and Limestone in 1992 (started 1985, first generation in 1990).		Bipole II first stage was completed in October 1978. The second stage was completed in May 1985. Development of the bipoles was staged with development of generation. Kettle was completed in 1974, Long Spruce in 1979 and Limestone in 1992 (started 1985, first generation in 1990).

	As mentioned above, Bipole II was the first application of water ~~coled~~ thyristor technology. At that time, thyristor ratings required two thyristors in parallel to handle the 2000 A requirement. Modern thyristors have much higher ratings (up to 4000 A) When and if these valves are replaced, the valve design will be much simpler.		As mentioned above, Bipole II was the first application of water cooled thyristor technology. At that time, thyristor ratings required two thyristors in parallel to handle the 2000 A requirement. Modern thyristors have much higher ratings (up to 4000 A) When and if these valves are replaced, the valve design will be much simpler.

	== Obsolesence ==		== Obsolesence ==

Dchapman: /* Description */ reformatter to list

2025-03-14T16:11:16Z

Description: reformatter to list

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	Successful dc system operation requires at least:		Successful dc system operation requires at least:

	• Ac generation designed to withstand the effects of dc conversion and transmission		• Ac generation designed to withstand the effects of dc conversion and transmission
	•
	• An ac system to transmit the generated power to the rectifier stations		• An ac system to transmit the generated power to the rectifier stations
	•
	• A rectifier station to convert ac power to dc power		• A rectifier station to convert ac power to dc power
	•
	• A dc transmission line (two pole) built to minimize external electromagnetic and electric field effects		• A dc transmission line (two pole) built to minimize external electromagnetic and electric field effects
	•
	• An inverter station to convert dc power back to ac power		• An inverter station to convert dc power back to ac power
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	• A fast communications system interconnecting the rectifier and inverter stations		• A fast communications system interconnecting the rectifier and inverter stations
	•
	Each of these components had to be designed, tested and developed to make the project work. Detailed descriptions of each component follow.		Each of these components had to be designed, tested and developed to make the project work. Detailed descriptions of each component follow.

Abrawerman: /* References */

2013-10-02T14:49:32Z

References

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	* Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik		* Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik


			[[Category:Electrical Engineering]]

Cnowell at 23:41, 9 September 2013

2013-09-09T23:41:34Z

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	* 1980 International Conference on Overvoltages and Compensation in Integrated AC-DC Systems		* 1980 International Conference on Overvoltages and Compensation in Integrated AC-DC Systems

	Switching Overvoltages on the Nelson River HVDC System – Studies, Experience and Field Tests – C.V. Thio, J.R. McNichol, W.M McDermid, D. Povh, W. Schultz		* Switching Overvoltages on the Nelson River HVDC System – Studies, Experience and Field Tests – C.V. Thio, J.R. McNichol, W.M McDermid, D. Povh, W. Schultz

	Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik		* Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik

Abrawerman at 23:22, 28 April 2013

2013-04-28T23:22:42Z

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	'''Where:''' The works described in this article are located in the Winnipeg area, a transmission corridor from Winnipeg to Gillam and multiple generation sites on the Lower Nelson River (east of Gillam).		'''Where:''' The works described in this article are located in the Winnipeg area, a transmission corridor from Winnipeg to Gillam and multiple generation sites on the Lower Nelson River (east of Gillam).
	~~[[File: File:DC Towers and Line.jpg \|thumbnail\|right\|HVdc Lines]]~~
	'''Why:''' When the Nelson River was being considered for development, readily accessible, economic sites for generation in Southern Manitoba were approaching full development. Alternatives to continued development of the hydro-electric resources in the province were either thermal or nuclear. Planners determined that the development of the Nelson River was the most economic alternative at that time.		'''Why:''' When the Nelson River was being considered for development, readily accessible, economic sites for generation in Southern Manitoba were approaching full development. Alternatives to continued development of the hydro-electric resources in the province were either thermal or nuclear. Planners determined that the development of the Nelson River was the most economic alternative at that time.

Abrawerman at 23:21, 28 April 2013

2013-04-28T23:21:49Z

← Older revision		Revision as of 18:21, 28 April 2013
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	'''Where:''' The works described in this article are located in the Winnipeg area, a transmission corridor from Winnipeg to Gillam and multiple generation sites on the Lower Nelson River (east of Gillam).		'''Where:''' The works described in this article are located in the Winnipeg area, a transmission corridor from Winnipeg to Gillam and multiple generation sites on the Lower Nelson River (east of Gillam).
			[[File: File:DC Towers and Line.jpg \|thumbnail\|right\|HVdc Lines]]
	'''Why:''' When the Nelson River was being considered for development, readily accessible, economic sites for generation in Southern Manitoba were approaching full development. Alternatives to continued development of the hydro-electric resources in the province were either thermal or nuclear. Planners determined that the development of the Nelson River was the most economic alternative at that time.		'''Why:''' When the Nelson River was being considered for development, readily accessible, economic sites for generation in Southern Manitoba were approaching full development. Alternatives to continued development of the hydro-electric resources in the province were either thermal or nuclear. Planners determined that the development of the Nelson River was the most economic alternative at that time.

Abrawerman: /* References */

2013-04-28T23:20:59Z

References

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	Proceedings, Manitoba Power Conference EHV-DC, Winnipeg, Canada 1971		Proceedings, Manitoba Power Conference EHV-DC, Winnipeg, Canada 1971
			* Background to HVDC in Manitoba – T.E. Storey, J.S. Foster
	~~The~~ Background to HVDC in Manitoba – T.E. Storey, J.S. Foster		* Single Line Diagram of the Nelson River HVDC Transmission System – R.E. Harrison
			* Nelson River HVDC Terminal Station Layout – R.K. Shemie, A.F. Buelow
	Single Line Diagram of the Nelson River HVDC Transmission System – R.E. Harrison		* Nelson River Converter Station Auxiliaries and Power Supplies – R.G. Radley, L.S. Chin
			* Nelson River HVDC Transmission Line Foundation Design Aspects – I. Reinart
	Nelson River HVDC Terminal Station Layout – R.K. Shemie, A.F. Buelow		* Nelson River HVDC Transmission Line Towers – D.L.T. Oakes
			* Contructional Aspect of the ±450 kV DC Nelson River Transmission Line – B.L. Barry, J.G. Cormie
	Nelson River Converter Station Auxiliaries and Power Supplies – R.G. Radley, L.S. Chin		* Radio Interference and Corona Loss Measurements on “Nelson River” Conuctors – R.M. Morris, A.R. Morse
			* Harmonic Interference from DC Lines – K.R. Ouelette, D.W. Lewis
	Nelson River HVDC Transmission Line Foundation Design Aspects – I. Reinart		* AC Filters for the Nelson River Transmission Project – D.E. Fletcher, C.D. Clarke
			* Ground Current Return Electrode Design – R.K. Shemie, D.S. Simons
	Nelson River HVDC Transmission Line Towers – D.L.T. Oakes		* Insulation Coordination for the Nelson River Converter Stations – D.E. Fletcher, F.G. Goodrich
			* HVDC Transmission Control Schemes – M.Z. Tarnawecky
	Contructional Aspect of the ±450 kV DC Nelson River Transmission Line – B.L. Barry, J.G. Cormie		* Control and Protection Aspects of the Nelson River Transmission Project – A.A. Burrow, B.A Rowe
			* Use of HVDC for Improving AC System Stability and Speed Control – R.W. Haywood, K.J. Ralls* Nelson River Transmission Project, Telecommunication Requirements and Design of Signal Processing Equipment – Y. Picot, C.J.B Martin
	Radio Interference and Corona Loss Measurements on “Nelson River” Conuctors – R.M. Morris, A.R. Morse

	Harmonic Interference from DC Lines – K.R. Ouelette, D.W. Lewis

	AC Filters for the Nelson River Transmission Project – D.E. Fletcher, C.D. Clarke

	Ground Current Return Electrode Design – R.K. Shemie, D.S. Simons

	Insulation Coordination for the Nelson River Converter Stations – D.E. Fletcher, F.G. Goodrich

	HVDC Transmission Control Schemes – M.Z. Tarnawecky

	Control and Protection Aspects of the Nelson River Transmission Project – A.A. Burrow, B.A Rowe

	Use of HVDC for Improving AC System Stability and Speed Control – R.W. Haywood, K.J. Ralls

	Nelson River Transmission Project, Telecommunication Requirements and Design of Signal Processing Equipment – Y. Picot, C.J.B Martin



	IEE Fifth International Conference on AC and DC Power Transmission, London, 17-20 September 1991		IEE Fifth International Conference on AC and DC Power Transmission, London, 17-20 September 1991

	The Integration of new valves and controls to Nelson River HVDC Bipole 1 – F.G. Goodrich, J.L. Hancock, B.A. Rowe and H.L. Thanawala (GEC Alsthom Transmission & Distribution Projects Limited), D.B. Willis (Manitoba Hydro)		* The Integration of new valves and controls to Nelson River HVDC Bipole 1 – F.G. Goodrich, J.L. Hancock, B.A. Rowe and H.L. Thanawala (GEC Alsthom Transmission & Distribution Projects Limited), D.B. Willis (Manitoba Hydro)

	On the design ,testing and operating experience of composite dry bushings in HVDC – M.M. Rashwan and W. McDermid (Manitoba Hydro), F. Hammer and A. Küchler (F&G Hochspannungsgeräte)		* On the design ,testing and operating experience of composite dry bushings in HVDC – M.M. Rashwan and W. McDermid (Manitoba Hydro), F. Hammer and A. Küchler (F&G Hochspannungsgeräte)

	1980 International Conference on Overvoltages and Compensation in Integrated AC-DC Systems		* 1980 International Conference on Overvoltages and Compensation in Integrated AC-DC Systems

	Switching Overvoltages on the Nelson River HVDC System – Studies, Experience and Field Tests – C.V. Thio, J.R. McNichol, W.M McDermid, D. Povh, W. Schultz		Switching Overvoltages on the Nelson River HVDC System – Studies, Experience and Field Tests – C.V. Thio, J.R. McNichol, W.M McDermid, D. Povh, W. Schultz

	Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik		Impact of the Winnipeg – Minneapolis 500 kV AC Interconnection on the Operation of the Nelson River HVDC System – D.A. Woodford, W. Koschik

Abrawerman at 23:18, 28 April 2013

2013-04-28T23:18:07Z

Show changes

Dchapman at 18:29, 28 April 2013

2013-04-28T18:29:35Z

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	The firing delay angle at the rectifier is between 5 and 15 degrees for normal operation.		The firing delay angle at the rectifier is between 5 and 15 degrees for normal operation.

	At the inverter the delay angle is larger than 90 degrees, and typically it is around 140 degrees. However what is really important for the inverter is the extinction angle γ. It determines the capability of the inverter valve to recover and withstand positive voltage again following conduction. A typical value for γ is 18 degrees for a 60 Hz system such as the Nelson River system. Smaller values of γ would lead to the outgoing valve re-conducting which causes a disturbance to the dc power. This phenomena is referred to as commutation failure. Often, and certainly in the Manitoba Hydro system, the inverter station (Dorsey) is located a long way from generation sources which could provide reactive power. Therefore, Dorsey station contains rotating machines, referred to as synchronous condensers (sometimes synchronous compensators). A synchronous condenser is basically a synchronous motor operating with no mechanical load. Dorsey station has 6 machines rated at +150 MVAr -60 MVAr and 3 machines rated at +300 MVAr –150 MVAr. Each has some overload capability and the combination of units is controlled on a steady state basis to ensure headroom for control actions (i.e., there is balancing of the loading according to rating).		At the inverter the delay angle is larger than 90 degrees, and typically it is around 140 degrees. However what is really important for the inverter is the extinction angle γ. It determines the capability of the inverter valve to recover and withstand positive voltage again following conduction. A typical value for γ is 18 degrees for a 60 Hz system such as the Nelson River system. Smaller values of γ would lead to the outgoing valve re-conducting which causes a disturbance to the dc power. This phenomena is referred to as commutation failure. Often, and certainly in the Manitoba Hydro system, the inverter station (Dorsey) is located a long way from generation sources which could provide reactive power. Therefore, Dorsey station contains rotating machines, referred to as synchronous condensers (sometimes synchronous compensators). A synchronous condenser is basically a synchronous motor operating with no mechanical load. Dorsey station has 6 machines rated at +150 MVAr -60 MVAr and 3 machines rated at +300 MVAr –150 MVAr. Each has some overload capability and the combination of units is controlled on a steady state basis to ensure headroom for control actions (i.e., there is balancing of the loading according to rating).

	Beyond the supply of reactive power, synchronous condensers (compensators) have the characteristic of supplying system strength. System strength refers to the ability to supply short circuit current by virtue of having an internal voltage source. (Synchronous condensors have an excitation system that controls the magnetic field generated by the machine rotor. This magnetic field induces a voltage on the stator of the machine.)		Beyond the supply of reactive power, synchronous condensers (compensators) have the characteristic of supplying system strength. System strength refers to the ability to supply short circuit current by virtue of having an internal voltage source. (Synchronous condensors have an excitation system that controls the magnetic field generated by the machine rotor. This magnetic field induces a voltage on the stator of the machine.)
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	ESCR = System MVA – Filter MVAr		ESCR = System MVA – Filter MVAr
	_________________________		_________________________
	Pdc		Pdc

Dchapman at 18:28, 28 April 2013

2013-04-28T18:28:58Z

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	'''Key Players:'''		'''Key Players:'''

	MH – Ernie Scott, Len Bateman, Lindsay Ingram, Tom Storey, Clarence Thio, Alf Buelow, Fred Jost, Don Simons, Chris Goodwin, Oliver Norris-Elye, Ken Ouelette, David Cass-Beggs, John McNichol and later Doug Chapman, Brett Davies		MH – Ernie Scott, Len Bateman, Lindsay Ingram, Tom Storey, Clarence Thio, Alf Buelow, Fred Jost, Don Simons, Chris Goodwin, Oliver Norris-Elye, Ken Ouelette, David Cass-Beggs, John McNichol and later Doug Chapman, Brett Davies, Peter Kuffel, Kelvin Kent

	MH Generation – Mac Uloth (Limestone)		MH Generation – Mac Uloth (Limestone)
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	AECL (owner of Bipole I and lines) – Bob Hamlin, Dick Haywood, Art Derry		AECL (owner of Bipole I and lines) – Bob Hamlin, Dick Haywood, Art Derry

	Teshmont (a joint venture of Templeton, Shawinigan, Montreal Engineering) Rubin Shemie, Ron Harrison, Bob Burton, Dave Fletcher, Arun Ogale, V. Burtnyk?, I. Reinart, R. Radley, L. Chin		Teshmont (a joint venture of Templeton, Shawinigan, Montreal Engineering) Rubin Shemie, Ron Harrison, Bob Burton, Dave Fletcher, Arun Ogale, V. Burtnyk, I. Reinart, R. Radley, L. Chin

	Dominion Bridge (towers) F. Stock, D.L.T. Oakes		Dominion Bridge (towers) F. Stock, D.L.T. Oakes