Receiving and meeting with EVNNPT mission at 50Hertz headquarters include
the Vice Presidents of 50Hertz and leaders of EGI (Elia Group International):
Mr. Dirk Biermann – Vice President on system operation, Mr. Frank Golletz –
Technical Vice President; leaders of EGI.
At the meeting, 50Hertz leaders introduced and
provide helpful information on organizational structure, issues and problems
faced in power transmission and the transmission system of 50Hertz and Germany:
- 50Hertz is one of 4 Power Transmission
Corporations of Federal Republic of Germany and it belongs to ELIA Group. 50Hertz has
mandates on management, operation, dispatch of power transmission system in the
North Eastern Germany including Berlin capital city, in an area of 1/3 of
Germany area and ensure a power supply to about 18 million people. 3 remaining
power transmission corporations include: TenneT, Amprion and Transnet BW.
- At present, 50Hertz has a total of 1,000 employees,
it manages and operates 10,150 km of transmission lines and underground cable, including
2 underground cable routes running through Baltic; 66 substations and switching
substations, with total capacity of 46,220 MVA, at voltage levels of 400, 380,
220 and 150 kV. The power transmission system of 50Hertz is connected with the
one of TenneT and some countries that share border with Germany such as Czech,
Poland, Denmark,...
- The power sources connected to 50Hertz
power transmission system include 9 wind power plants, 12 thermal power plants
and recycle energy sources. Customers of 50Hertz are 168 regional power
distribution companies and 3 steel plants.
- Organizational model of 4 power transmission
corporations of Germany:
+ 50Hertz is a stock company, with 60% stock of
ELIA and remaining 40% belonged to Australian Infrastructure Fund. These 2
shareholders invest in 50Hertz through EuroGrid company.
+ TenneT: owned by Holand Power
Transmission Corporation (100% state owned company) .
+ Amprion: owned by German investors.
+ Transnet BW: owned by a company of local
authority. This company manages the
power generation, transmission and distribution.
These power transmission corporations operate
according to Law on Electricity of Federal Republic of Germany.
- Live working: previously, 50Hertz applied live
working for transmission lines and substations. However, live working is not
applied because 50Hertz’s power transmission system has met n-1 requirement, so
when power cut-off is done in a transmission line or substation, the power
supply to load centres is not affected.
EVNNPT mission visited a spare Remote
Control Centre of 50Hertz
- Unmanned substation: at present 100% substations
managed by 50Hertz are unmanned. All substations are controlled by a Remote
Control Centre which is near Berlin city. Besides, 50Hertz has a spare remote
control centre located in its headquarters. The unmanned substations are
equipped with computer system for controlling when necessary. The substation
protection is out-sourced implemented.
- Maintenance, repair, testing, troubleshooting:
80% of these tasks are out-sourced, while remaining 20% tasks are implemented
by 7 regional centres which are 50Hertz’s subsidiaries. These 7 centres can
carry out monitoring the out-sourced implementation.
- Training: 50Hertz does not have specific
training centres. All training activities are implemented in training centre in
EuroGrid.
- Power loss in transmission system of 50Hertz is
2.08% (at 220kV and 380 kV).
- Construction investment: 50Hertz planed that,
from 2016 to 2026, it will implement 20 new constructed projects and 20
re-constructed projects. The project design and management consultation is done
by international competitive bidding. EGI (ELIA and 50Hertz – each unit owned
50%) have gained many bids for 50Hertz projects. For the main equipment,
50Hertz signs principal contracts with some big manufacturers such as Siemens,
ABB and 50Hertz will select one of them for each project. Project management
consultant will organize selection of contractors for civil works.
In the meeting, EVNNPT mission introduced its organizational structure and
business. Chairman Dang Phan Tuong honestly thanked leaders of 50Hertz and EGI
for receiving and meeting with EVNNPT
mission as well as sharing experiences in management, operation of power
transmission system. Chairman Tuong also revealed that EVNNPT is carrying out many project proposals in order to increase
production efficiency including: Formulating EVNNPT’s development strategy to year 2025, with orientation to year 2035;
Assessment of current status of Vietnam power transmission system and
recommendation of solutions; live working for transmission lines and
substations, etc. These proposals are implemented by International Competitive
Bidding for consulting services or feasibilities studies… EVNNPT plans to invite the
international consulting agencies to make assessment, argument of such
proposals so that EVNNPT will
complete and deploy the proposals. EVNNPT expects
to organize workshop in Vietnam on power transmission by early 2017 and invite
the international transmission utilities to make presentations. Chairman Tuong
kindly requested 50Hertz and EGI to participate in such proposals and expected
that 50Hertz, EGI will continue sharing information and experiences in power
transmission.
Leaders of 50Hertz, EGI confirmed to provide
support, share experiences with EVNNPT
in all businesses. 50Hertz, EGI will assign experts to Vietnam to find out more
detail about Vietnam power transmission system and EVNNPT’s businesses so that they would participate efficiently the
proposals mentioned by Chairman Tuong./.