System-state and operating condition sensitive control method and apparatus for electric power ...

39 Pages·2007·3.45 MB·English

https://ntrs.nasa.gov/search.jsp?R=20080012256 2018-12-20T08:11:08+00:00Z
United States Patent
4,084,103
[19] [I11
Burns, 111 et al. [45] Apr. 11, 1978
[54] SYSTEM-STATE AND OPERATING 1571 ABSTRACT
CONDITION SENSITIVE CONTROL
This invention provides a method and apparatus for
METHOD AND APPARATUS FOR
determining a precise switching sequence for the power
ELECTRIC POWER DELIVERY SYSTEMS
switching elements of electric power delivery systems
[76] Inventors: William Wesley Burns, 111, 45-D, of the on-off switching type and which enables ex-
Colonial Apts., Durham, N.C. 27707; tremely fast transient response, precise regulation and
Thomas George Wilson, 2721 Sevier highly stable operation. The control utilizes the values
St., Durham, N.C. 27705 of the power delivery system power handling network
[21] Appl. No.: 804,225 components, a desired output characteristic, a system
timing parameter, and the externally imposed operating
[22] Filed: Jun. 7,1977 conditions to determine where steady state operations
[Sl] Int. Cl.2 ............................................. HOlH 47/00 should be in order to yield desired output characteris-
[52] U.S. Cl. ........................ 307/132 R 307/132 EA; tics for the given system specifications. The actual state
363/124 of the power delivery system is continuously monitored
[58] Field of Search ................... 307/96, 97, 125, 130, and compared to a state-space boundary which is de-
307/131, 229, 240, 132 R, 132 E, 132 EA, rived from the desired equilibrium condition, and from
363/124 the information obtained from this comparison, the
[561 References Cited system is moved to the desired equilibrium condition in
one cycle of switching control. Since the controller
U.S. PATENT DOCUMENTS
continuously monitors the power delivery system's
3,454,834 7/1969 Giannamore ........................ 363/124 externally imposed operating conditions, a change in
3,953,783 4/1976 Peters, Jr. ............................ 363/124 the conditions is immediately sensed and a new equilib-
3,953,785 4/1976 Bell, Jr. ................................ 363/124 rium condition is determined and achieved, again in a
Primaly Examiner-Robert K. Schaefer single cycle of switching control.
Assistant Examiner-Eugene S. Indyk
Attorney, Agent, or Firm-Charles W. Helzer 31 Claims, 41 Drawing Figures
U.S. PEikIlt 4,084,103
April 11, 1978 Sheet 1 of 15
D
I I
U.S. Patent 4,084,103
April 11, 1978 Sheet 2 of 15
1
LO
U.S. ]Patent 4,084,103
April 11, 1978 Sheet 3 of 15
U j I I IA - I
0.980 io2
\
U.S. Patent 4,084,103
April 11, 1978 Sheet 4 of 15
1
U.S. Patent 4,084, I03
April 11, 1978 Sheet 5 of 15
I
U.S. Patent 4,084,103
April 11, 1978 Sheet 6 of 15
0.9
f
I
\
\
\
1
\
\
\ '.
\
\
0 0.997 L99 z99 3.99
0,975 1.0 0 0.997 s99 299 399
\
\
\
\ '\
'.
\
N
0 0.397 i.99 2.99 3.99
U.S. Patent 4,084,103
April 11, 1978 Sheet 7 of 15
$-N
2.0
0.993
U.S. Patent 4,084,103
April 11, 1978 Sheet 8 of 15
t
COMPUTE
la"
t
t
t
CON rllVU0U.S
CONPUT€
%-off
t
U.S. Patent 4,084,103
April 11, 1978 Sheet 9 of 15
Lri
OPERATION