The aspects of steady state calculation, operating conditions of electric power system, transmission and distribution networks

2008 ◽  
Author(s):  
I. Tarasov Vladimir ◽  
Dari Sodnomdorj ◽  
Tsevegjav Onormaa ◽  
Banzragch Torbat ◽  
Dorjgochoo Sarangerel
Keyword(s):  
Steady State ◽  
Power System ◽  
Electric Power ◽  
Distribution Networks ◽  
Electric Power System ◽  
Operating Conditions ◽  
State Calculation ◽  
Transmission And Distribution

scholarly journals Electric Power System Operation Mechanism with Energy Routers Based on QoS Index under Blockchain Architecture

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 418 ◽  
Author(s):  
Gangjun Gong ◽  
Zhening Zhang ◽  
Xinyu Zhang ◽  
Nawaraj Kumar Mahato ◽  
Lin Liu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Electric Power ◽  
Distribution Networks ◽  
Electric Power System ◽  
Control Flow ◽  
Utilization Efficiency ◽  
Stable Operation ◽  
Bidirectional Power Flow ◽  
Transmission And Distribution

With the integration of highly permeable renewable energy to the grid at different levels (transmission, distribution and grid-connected), the volatility on both sides (source side and load side) leading to bidirectional power flow in the power grid complicates the control mechanism. In order to ensure the real-time power balance, energy exchange, higher energy utilization efficiency and stability maintenance in the electric power system, this paper proposes an integrated application of blockchain technology on energy routers at transmission and distribution networks with increased renewable energy penetration. This paper focuses on the safe and stable operation of a highly penetrated renewable energy grid-connected power system and its operation. It also demonstrates a blockchain-based negotiation model with weakly centralized scenarios for “source-network-load” collaborative scheduling operations; secondly, the QoS (quality of service) index of energy flow control and energy router node doubly-fed stability control model were designed. Further, it also introduces the MOPSO (multi-objective particle swarm optimization) algorithm for power output optimization of multienergy power generation; Thirdly, based on the blockchain underlying architecture and load prediction value constraints, this paper puts forward the optimization mechanism and control flow of autonomous energy coordination of b2u (bottom-up) between router nodes of transmission and distribution network based on blockchain.

scholarly journals STUDY OF TRANSIENT AND STATIONARY OPERATION MODES OF SYNCHRONOUS SYSTEM CONSISTING IN TWO MACHINES

2017 ◽  
Vol 60 (3) ◽  
pp. 228-236
Author(s):  
V. S. Safaryan
Keyword(s):  
Mathematical Model ◽  
Steady State ◽  
Power System ◽  
Mathematical Models ◽  
Coordinate System ◽  
Electric Power ◽  
Electric Power System ◽  
Machine System ◽  
Transient Regimes ◽  
The Mathematical Model

The solution of the problem of reliable functioning of an electric power system (EPS) in steady-state and transient regimes, prevention of EPS transition into asynchronous regime, maintenance and restoration of stability of post-emergency processes is based on formation and realization of mathematical models of an EPS processes. During the functioning of electric power system in asynchronous regime, besides the main frequencies, the currents and voltages include harmonic components, the frequencies of which are multiple of the difference of main frequencies. At the two-frequency asynchronous regime the electric power system is being made equivalent in a form of a two-machine system, functioning for a generalized load. In the article mathematical models of transient process of a two-machine system in natural form and in d–q coordinate system are presented. The mathematical model of two-machine system is considered in case of two windings of excitement at the rotors. Also, in the article varieties of mathematical models of EPS transient regimes (trivial, simple, complete) are presented. Transient process of a synchronous two-machine system is described by the complete model. The quality of transient processes of a synchronous machine depends on the number of rotor excitation windings. When there are two excitation windings on the rotor (dual system of excitation), the mathematical model of electromagnetic transient processes of a synchronous machine is represented in a complex form, i.e. in coordinate system d, q, the current of rotor being represented by a generalized vector. In asynchronous operation of a synchronous two-machine system with two excitation windings on the rotor the current and voltage systems include only harmonics of two frequencies. The mathematical model of synchronous steady-state process of a two-machine system is also provided, and the steady-state regimes with different structures of initial information are considered.

scholarly journals PERHITUNGAN KERUGIAN ENERGI PADA PENYULANG TAMBAK LOROK-03 SEBAGAI SALAH SATU PILOT PROJECT PROGRAM REVASS (REVENUE ASSURANCE) DALAM PROGRAM REKONSILIASI ENERGI PT. PLN (PERSERO) AREA SEMARANG

2014 ◽  
Vol 18 (1) ◽  
pp. 16
Author(s):  
Ruri Diana Putranti ◽  
Iman Setiono
Keyword(s):  
Power System ◽  
Electric Power ◽  
Loss Factor ◽  
Power Loss ◽  
Pilot Project ◽  
Electric Power System ◽  
Energy Losses ◽  
Energy Depletion ◽  
Distribution Energy ◽  
Transmission And Distribution

Ruri Diana Putranti, Iman Setiono, in paper calculation of energy losses of Tambak Lorok - 03 feeder as one of the pilot project program REVASS (revenue assurance) in energy reconciliation program of PT . PLN (persero) semarang area explain that in an electric power system there is a factor called the loss factor or energy depletion . This shrinkage can be found in various places on the electricity network , from generation, transmission and distribution of both to consumers . The release of energy or commonly referred to as shrinkage , the harm to the company for commercial and service in large and small quantities . Pond feeder Lorok - 03 is one of the feeders are thought to have a large enough energy depletion . This feeder is in the working area of ​​PT . PLN Rayon East Semarang and is a feeder into the pilot established REVASS ( Revenue Assurance ) PT . PLN Semarang area . Based on mathematical calculations that have been carried out in February 2013 the amount of power loss in the feeder is 2,316,319 KWH , while in the month of March 2013 is 4,765,637 KWH and in April 2013 amounted to 18,809,238 KWH . The amount of power loss raises the average monthly percentage losses in the feeder that is between 10-20 % . This of course lead to a loss for the company , especially on the commercial side that is the size of the company to the customer's receivables . Therefore , a program in which reconciliation is REVASS this project , is one attempt to get the suitability amount of energy from the power sent to the power received at the customer . Keywords : Electric Power System , Network Distribution , Energy Losses , Reconciliation of Energy

scholarly journals Preventive Thermographic Diagnostic of a HV Busbar Disconnector

2016 ◽  
Vol 20 (1) ◽  
pp. 3
Author(s):  
Predrag Šaraba ◽  
Zoran Ljuboje ◽  
Božidar Popović ◽  
Dražan Krsmanović
Keyword(s):  
Power System ◽  
Electric Power ◽  
Preventive Maintenance ◽  
Diagnostic Testing ◽  
Electric Power System ◽  
Operating Conditions ◽  
Reliable Information ◽  
Online Testing ◽  
System Availability ◽  
Condition Diagnosis

For the purpose of increasing quality, continuity and, at the same time, of increasing reliability and decreasing the losses in an electric power system (EPS), there is an emerging need for preventive diagnostic testing. From the standpoint of an electric power system availability, it is desirable to perform as many tests as possible without a violation of operating conditions of the system itself. The paper presents the thermographic testing of a HV disconnector, as an online testing with the aim of preventive maintenance and condition diagnosis of particular elements, as well as the suggestions for taking adequate measures with the aim of removing potential malfunctions. For the testing results to be quality and to give a reliable information, the load of a facility must be bigger that 50% of the nominal power. On the basis of obtained thermograms, the analysis of the disconnector and its contacts is performed, as well as of the contacts towards other elements in the facility.

scholarly journals PENGARUH PENAMBAHAN PENDINGIN AIR PADA TRANSFORMATOR DAYA UNTUK PEMBEBANAN

2018 ◽  
Vol 9 (1) ◽  
pp. 8-15
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Power System ◽  
Electric Power ◽  
Water Consumption ◽  
Temperature Rise ◽  
Electric Power System ◽  
Power Transformers ◽  
Water Cooling ◽  
Ambient Temperatures ◽  
Transmission And Distribution ◽  
System Power

Power transformers are one of the important equipment in the electric power system. Power transformers are devices with the largest investment in a transmission and distribution substations. Currently, the use of power transformers at Marunda substations on average has reached 80% of rated load. Then require maximum of cooling transformers, to restrain the rate of the winding and oil temperature rise. Result of the research were obtained with the addition of water cooling at power transformers can be reduce the heat due to the high ambient temperatures. The results showed a decrease in temperature of 3°C, so can be used to add transformers loading of 2,51 MW. While of water consumption was 2,052 m3 per day.

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