Managing Transmission System Strength in the Transition to Renewables
Abstract
The transition from fossil fuelled synchronous generators to asynchronous variable renewable energy generating plant has resulted in an increasing reduction in system strength (sensitivity of voltage to a disturbance) in the transmission network. Synchronous generators inherently contribute to both system inertia and fault levels, which maintain network stability (frequency and voltage) following disturbances. Conversely, inverter or induction generator based asynchronous generation reduces system strength. Consequently, inherent mechanisms to maintain grid stability are being removed.
System strength is a local phenomenon in the network, as the propagation of system strength support technologies is hampered by the natural impedance of the network. Fault currents vary around the grid both by location and by voltage level. The perceived wisdom is that the contribution, which fault levels make to system strenght, must in general be supplied locally within an identified weak network.
In his presentation Dr Stephen Hinchliffe will describe: What system strength is and what it isn’t; why it is of such importance to Transmission Network Service Providers to maintain grid security; the rules around maintaining minimum levels of system strength; the obligations placed on renewable energy developers and the implications for projects including ways to mitigate risk.
Date and Time
Location
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- Date: 03 Jul 2020
- Time: 12:00 PM to 12:50 PM
- All times are (GMT+10:00) Australia/Queensland
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- https://qut.zoom.us/j/99791459377
- Brisbane, Queensland
- Australia
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- Co-sponsored by Queensland University of Technology
Speakers
Stephen Hinchliffe of GHD Advisory
Biography:
Dr Stephen Hinchliffe has 25 years’ experience in the power sector; initially developing clean energy projects and then as a consultant. He has Masters’ degrees in Electrical Engineering, Business Administration and Commercial Law and a PhD in Power Inverters.
Stephen is a Fellow of the Institution of Engineering and Technology and a member of CIGRE Australia Group C5 (Electricity Markets and Regulation). He advises on market regulation; power network planning, Marginal Loss Factors, network constraints and grid strength requirements. He supports developers and financiers with project evaluation, asset transactions and has advised government on renewable energy policy, including the need for long term storage to firm renewables and enable 100% carbon neutral targets to be met.
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