EP 0090212 B1 19880113 - APPARATUS FOR AUTOMATICALLY TRACKING THE OPTIMUM WORKING POINT OF A D.C. VOLTAGE SOURCE
Title (en)
APPARATUS FOR AUTOMATICALLY TRACKING THE OPTIMUM WORKING POINT OF A D.C. VOLTAGE SOURCE
Publication
Application
Priority
DE 3212022 A 19820331
Abstract (en)
[origin: US4510434A] Solar generators, fuel cells and similar d-c voltage sources have a current-voltage characteristic, on which at one point ("maximum power point" MPP) the maximum power can be taken from the d-c voltage source. In an arrangement, in which a d-c voltage source feeds a consumer through a controllable power converter, the optimum operating point is automatically set by setting a reference value for the voltage or the current into the converter, and impressing a supplemental reference value temporarily thereon as a disturbance variable at certain time intervals. If due to the impression, the output power of the d-c voltage source increases, the reference value is adjusted in the direction of the supplemental reference value. If, on the other hand, the sign of the power change is negative, the reference value is changed opposite to the sign of the supplemental reference value. After a finite number of reference value changes, the instantaneous operating point is this brought to the optimum operating point. Since the sign of the power change is determined through evaluation of the derivative with respect to time of the actual power value, the amplitude of the disturbance variable can be chosen very small, so that the operation of the consumer is not impaired.
IPC 1-7
IPC 8 full level
G05F 1/56 (2006.01); G05B 13/02 (2006.01); G05F 1/66 (2006.01); G05F 1/67 (2006.01)
CPC (source: EP US)
G05F 1/67 (2013.01 - EP US); Y10S 323/906 (2013.01 - EP US)
Citation (examination)
- US 3384806 A 19680521 - HARTMAN DAVID J
- Buch von H.S. Tsien "Technische Kybernetik" (1957), Verlag Berliner Union, S. 214-218
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0090212 A2 19831005; EP 0090212 A3 19841128; EP 0090212 B1 19880113; AT E31983 T1 19880115; DE 3212022 A1 19831006; DE 3375336 D1 19880218; JP S58182726 A 19831025; US 4510434 A 19850409
DOCDB simple family (application)
EP 83102274 A 19830308; AT 83102274 T 19830308; DE 3212022 A 19820331; DE 3375336 T 19830308; JP 5676083 A 19830331; US 47834383 A 19830324