Future trends in Air Force aircraft electrical power distribution and control

1977 ◽  
Author(s):  
E. CAPUTO ◽  
D. FOX
Keyword(s):  
Air Force ◽  
Power Distribution ◽  
Electrical Power ◽  
Future Trends ◽  
And Control

scholarly journals EVALUASI PENYETELAN RELE JARAK PADA JARINGAN TRANSMISI 70 kV BOLOK – MAULAFA MENGGUNAKAN DIGSILENT 15.1.7

2020 ◽  
pp. 1-9
Author(s):  
Agusthinus S. Sampeallo ◽  
Nursalim Nursalim ◽  
Maria Alfiana Sea Sagho
Keyword(s):  
Power Distribution ◽  
Electrical Power ◽  
Distance Relay ◽  
Standard Distance ◽  
Trip Time ◽  
Calculation Results ◽  
Distance Relays ◽  
Protection And Control ◽  
And Control ◽  
Distribution Distance

ABSTRAKDalam menjamin keandalan penyaluran daya listrik maka, rele jarak sebagai rele proteksi utama pada jaringan transmisi 70 kV Bolok - Maulafa harus mampu mendeteksi dan melokalisr gangguan yang ada. Rele Jarak bekerja dengan membandingkan impedansi pada saluran (impedansi gangguan) dengan impedansi terpasang (impedansi penyetelan). Penelitian ini dilakukan untuk melihat apakah penyetelan yang ada sekarang sudah sesuai dengan ketentuan yang ada dalam Buku Pedoman Proteksi dan Kontrol Penghantar. Evaluasi ini dilakukan dengan membandingkan penyetelan yang terpasang dengan ketentuan penyetelan yang diatur dalam Dok:PDM/SGI15:2014 yang kemudian dilakukan simulasi mengguanakan DigSilent 15.1.7 untuk melihat jangkauan rele jarak berdasarkan penyetelan ituDari hasil evaluasi, penyetelan impedansi oleh PT.PLN sudah tidak sesuai dengan ketentuan yang ada dan untuk penyetelan waktu trip sudah sesuai dengan ketentuannya. Berdasarkan hasil perhitungan penyetelan baru (sesuai standar) rele jarak didapat nilai penyetelan baru untuk zona 1 dan zona 2 bay penghantar Bolok - Maulafa sebesar 4.69870.18⁰ sec.ohm dan 13.65870.18⁰ sec.ohm. Sedangkan untuk penghantar Maulafa - Bolok sebesar 4.264 70.18⁰ sec.ohm dan 6.07670.18⁰ sec.ohm. ABSTRACT In ensuring the reliability of electrical power distribution, distance relays as the main protection relays on the transmissiom line 70 kV Bolok - Maulafa must be able to detect and localize existing disturbances. Distance Rele works by comparing the impedance of the line (fault impedance) with the installed impedance (tuning impedance). This research was conducted to see whether the current settings are in accordance with the provisions in the introductory Protection and Control Handbook. This evaluation is carried out by comparing the settings attached to the tuning conditions set out in the Doc: PDM / SGI15: 2014 which are then simulated using DigSilent 15.1.7 to see the distance relay range based on that adjustment.From the evaluation results, the impedance setting by PT.PLN is no longer in accordance with the existing provisions and for setting the trip time in accordance with the provisions. Based on the calculation results of the new settings (according to the standard) distance relay, the value of the new settings for zone 1 and zone 2 of the Bolok - Maulafa conveyor bay is 4.69870.18⁰ sec.ohm and 13.65870.18⁰ sec.ohm. As for the conductor of Maulafa - Bolok, it is 4,26470.18⁰ sec.ohm and 6,07670.18⁰ sec.ohm.

scholarly journals Non-isolated load sharing direct current system operation with use of the auctioneering diodes

2019 ◽  
Vol 28 ◽  
pp. 01037 ◽  
Author(s):  
Maciej Kozak
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Heat Dissipation ◽  
Current System ◽  
Electrical Power ◽  
Experimental System ◽  
Laboratory System ◽  
Simulation Studies ◽  
Power Distribution System ◽  
Electrical Systems

The paper presents the background and results of numerical simulation and experimental research of a system using auctioneering diodes used to distribute the electrical power between two power converters connected with intermediate circuits in parallel, direct connection. Presented non-isolated power distribution system which utilizes blocking diodes placed in DC branches are used in the selected ship's electrical systems, however, they create problems related to control and handling ground faults. Another issue occurring during the operation of this type of systems is increased heat dissipation while diodes switching. Selected problems related to the operation of experimental system have been identified by means of simulation studies and experiments carried out in a 11 kVA laboratory system and the theoretical basis along with results are provided in the article.

scholarly journals Investigation of the Impact of Large-Scale Integration of Electric Vehicles for a Swedish Distribution Network

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4717 ◽  
Author(s):  
Sylvester Johansson ◽  
Jonas Persson ◽  
Stavros Lazarou ◽  
Andreas Theocharis
Keyword(s):  
Electric Vehicles ◽  
Power Distribution ◽  
Large Scale ◽  
Electrical Power ◽  
Distribution Network ◽  
Transport Sector ◽  
Smart Charging ◽  
Large Scale Integration ◽  
Scale Integration ◽  
The Impact

Social considerations for a sustainable future lead to market demands for electromobility. Hence, electrical power distribution operators are concerned about the real ongoing problem of the electrification of the transport sector. In this regard, the paper aims to investigate the large-scale integration of electric vehicles in a Swedish distribution network. To this end, the integration pattern is taken into consideration as appears in the literature for other countries and applies to the Swedish culture. Moreover, different charging power levels including smart charging techniques are examined for several percentages of electric vehicles penetration. Industrial simulation tools proven for their accuracy are used for the study. The results indicate that the grid can manage about 50% electric vehicles penetration at its current capacity. This percentage decreases when higher charging power levels apply, while the transformers appear overloaded in many cases. The investigation of alternatives to increase the grid’s capabilities reveal that smart techniques are comparable to the conventional re-dimension of the grid. At present, the increased integration of electric vehicles is manageable by implementing a combination of smart gird and upgrade investments in comparison to technically expensive alternatives based on grid digitalization and algorithms that need to be further confirmed for their reliability for power sharing and energy management.

LSI Microcomputer and Digital Control

1975 ◽  
Vol 97 (2) ◽  
pp. 149-156 ◽  
Author(s):  
I. Lee
Keyword(s):  
Digital Control ◽  
Historical Background ◽  
Control System Design ◽  
Future Trends ◽  
Digital Control System ◽  
Control Logic ◽  
Present Trend ◽  
Potential Impact ◽  
Microprocessor Technology ◽  
And Control

This paper gives a tutorial presentation and overview of LSI microprocessor technology for control engineers and control logic designers. The historical background, present status and future trends of this dynamic technology are presented, and its enormous potential impact on digital control system design and implementation is explored through examples and extrapolation of the present trend.

Modeling, Actuation, and Control of an Active Fluid Vibration Isolator

1997 ◽  
Vol 119 (1) ◽  
pp. 52-59 ◽  
Author(s):  
M. J. Panza ◽  
D. P. McGuire ◽  
P. J. Jones
Keyword(s):  
Electrical Power ◽  
Fluid Pressure ◽  
Space Representation ◽  
Vibration Isolator ◽  
Mass System ◽  
Integral Control ◽  
Active Fluid ◽  
State Space Representation ◽  
In Series ◽  
And Control

An integrated mathematical model for the dynamics, actuation, and control of an active fluid/elastomeric tuned vibration isolator in a two mass system is presented. The derivation is based on the application of physical principles for mechanics, fluid continuity, and electromagnetic circuits. Improvement of the passive isolator performance is obtained with a feedback scheme consisting of a frequency shaped notch compensator in series with integral control of output acceleration and combined with proportional control of the fluid pressure in the isolator. The control is applied via an electromagnetic actuator for excitation of the fluid in the track connecting the two pressure chambers of the isolator. Closed loop system equations are transformed to a nondimensional state space representation and a key dimensionless parameter for isolator-actuator interaction is defined. A numerical example is presented to show the effect of actuator parameter selection on system damping, the performance improvement of the active over the passive isolator, the robustness of the control scheme to parameter variation, and the electrical power requirements for the actuator.

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