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Electrical power system for a 3U CubeSat nanosatellite incorporating peak power tracking with dual redundant control

Bester J., Wilkinson R.

Przegląd Elektrotechniczny

2012

R. 88, nr 4a

300-304

Since the advent of the CubeSat nanosatellite standard it has been embraced by many universities as an affordable means of conducting space science, with the backbone of any such mission being the supply of electrical power to the spacecraft’s payloads. This paper details the design of a photovoltaic-battery based power supply utilising peak power trackers for solar array regulation and battery charging. Uniquely, the peak power tracking is executed by an active search algorithm, Perturb & Observe, in both analogue and digital form as a measure of redundancy.

W artykule opisano projekt baterii fotowoltaicznych wykorzystujący układ śledzenia maksymalnej mocy do sterowania procesem wytwarzania energii i ładowania baterii. Wykorzystano algorytm Perturb & Observe.

Design and testing of a low cost peak-power tracking controller for a fixed blade 1.2 kVA wind turbine

Gitano H., Taib S., Khdeir M.

Electrical Power Quality and Utilisation. Journal

2008

Vol. 14, iss. 1

95--101

Wind turbines are a common source of electrical power generation in rural sites around the world. The power generated by a wind turbine at a given wind speed is a non-linear function of rotor speed. This results in a specific rotor speed for maximum power production at each wind speed. A control system incorporating a Pulse Width Modulated DC -DC converter has been designed to vary the load on the wind turbine thereby forcing it to operate at its maximum power point. Another important feature of the controller is the application of electrical stall-breaking of the turbine. The circuit was then tested on a turbine test bed simulating various wind speeds, and the “peak-power tracking” capability and electrical breaking capability were verified. The system gave an overall efficiency of 70 to 80% over a wide range of wind speeds and PWM duty cycles.