Over the past months, this newsletter worked through impedance-based stability analysis in eight parts — from why the classical tools stopped seeing converter-driven instability, through the Nyquist criterion and Bode margins, to passivity and the guarantee it offers.
Several of you asked whether it would ever exist as one document. It now does.
Impedance-Based Stability Analysis — A Practitioner’s Guide is 61 pages: the eight articles compiled, corrected, and edited into a continuous argument, with twenty figures, a glossary of the thirty terms that carry specific technical meaning in this field, and a referenced source list covering the papers, standards, and grid codes behind every claim.
A note on the word corrected. Compiling the series forced a consistency pass that reading it week by week never would. Several factual points were tightened against primary sources — grid-code dates and scope, a mis-stated “world’s first,” a phase margin that didn’t match its own figure. This version is the authoritative one.
Paid subscribers: email contact@gridstab.com and I’ll send you a 40% code.
You have already funded most of this work, and the guide exists because of it. The discount is the simplest way I have of saying so. A single line is enough — just let me know you’re a subscriber and I’ll come back to you.
If you are reading this on the free list, the same applies from the moment you upgrade: paid subscribers get every deep dive as it is published, and 40% off anything I compile from them.
There’s a free preview — cover, preface, how to use it, and the whole of Chapter 1 — if you’d like to see the style before deciding.
The pdf document is available here.
Thank you for reading the series. The questions it generated shaped it more than you’d guess.
Gilles
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