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Siemens

The document summarizes a three-day workshop hosted by Siemens on integrating renewable energy sources into power grids more efficiently. Over the course of several presentations: 1) Speakers discussed challenges of increasing renewable penetration like grid instability and frequency fluctuations. They presented solutions like DC transmission lines and variable shunt reactors to help stabilize grids. 2) Other talks covered sources of direct current in grids and using compensation devices to mitigate corrosion and noise from DC. Phase shifting transformers were presented as a way to balance loads between parallel transmission lines. 3) The final day looked at ensuring grid resilience against risks from operational issues, natural disasters, and other outages. It also discussed the role of digitalization and big data

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Anthony Lacastesantos
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182 views2 pages

Siemens

The document summarizes a three-day workshop hosted by Siemens on integrating renewable energy sources into power grids more efficiently. Over the course of several presentations: 1) Speakers discussed challenges of increasing renewable penetration like grid instability and frequency fluctuations. They presented solutions like DC transmission lines and variable shunt reactors to help stabilize grids. 2) Other talks covered sources of direct current in grids and using compensation devices to mitigate corrosion and noise from DC. Phase shifting transformers were presented as a way to balance loads between parallel transmission lines. 3) The final day looked at ensuring grid resilience against risks from operational issues, natural disasters, and other outages. It also discussed the role of digitalization and big data

Uploaded by

Anthony Lacastesantos
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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SIEMENS “GO GREEN” WORKSHOP

June 7-9, 2017


EDSA Shangri-La, Manila

Attendees: Anthony F. Lacastesantos, SIOMD-MSO

9:15-10:00AM (45mins) Integration of Renewables by Dr. Edwin Lerch


 Development in Power Generation (Generation Mix)
 European Grid Overview: Generation, Load Demand/Year
 Interconnection between Turkey and Europe
 German Electric Supply System
 Germans opted to use DC transmission because the DC transmission line has a better control on the
fluctuation (direction of power) from renewable energy than AC.

10:15-10:45AM (30mins) Grid Operators View by Customer Senior Executive (Dr. Edwin Lerch)
 Different aspects of stability
 Inter-Area Oscillations through system growth
 Inter-area oscillation occurs when large systems are connected by a weak coupling
 Longitudinal Configuration (Radially Connected)
 Systems connected in longitudinal configuration leads to oscillation and DC transmission line helps
minimize frequency oscillation.
 Destabilization of Grid Frequency by Renewables
 Large penetration of renewable sources with no share of synchronizing torque, thus rate of change
of frequency increases.

11:30-12:00PM (30mins) Variable Shunt Reactors by Oliver Bitter


 Purpose of Variable Shunt Reactors
 Rectifies variations in MW generation resulting in voltage fluctuations
 Rectifies variations in line loading thus variation in voltage rise
 Rectifies variation in load
 Compensates the Ferranti Effect
 Typical Market Drivers which calls for Variable Shunt Reactor
 Increasing renewable power generation
 Rapid Grid Extension
 Variable Load Cycles

1:45-2:30PM (45mins) Direct Current Compensation by Peter Hamberger


 Sources of Direct Current in the Grid
 Renewable Power Generation
 DC powered railroads
 Power Electronics in Networks
 HVDC
 GIC (Geo-magnetic Induced Currents)
 Effects of Direct Current in the Transformers
 Increases noise level (decibels)
 Promotes corrosion
 Increases No-Load Losses
 Using a Transractor to compensate and monitor DC currents

2:30-3:15PM (45mins) Phase Shifting Transformers by Guenter Linortner


 Purpose of Phase Shifting Transformers
 Balances the load between parallel lines by distributing the load to the other line/s in parallel.
 Principle of Operation
 Acts like an additional voltage source
 Drivers of PST
 Increase in renewable power generation
 Power generation centers with long transmission distances to load centers
 Increased electricity exchange between countries or different system operators
 Urbanization with concentrated local increase in electricity demand
 Applications of PST
 Increases transmission line capacity
 Protects own grid from incoming/outgoing load/generation of adjacent network
 Improves commercial cross-network trading
 Fast connection of networks with large difference in phase angle.
 PST types
 Two Core Design
 Single Core Design

3:45-4:30PM (45mins) PRETACT Transformers by Arvind Batra


 Risk factors for grid resilience
 Operational issues
o Network failure
o Incorrect operations
o Aged fleet
 Natural disasters
o Earthquakes
o Hurricanes
o Geomagnetic storms
 Other forced outages
o Physical impacts
o Cyber impacts

3:30-5:00PM (45mins) Outlook: Digitalization and Big Data by Uwe Guendisch

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