scholarly journals Optimal Techno-Economic Planning of a Smart Parking Lot—Combined Heat, Hydrogen, and Power (SPL-CHHP)-Based Microgrid in the Active Distribution Network

2021 ◽  
Vol 11 (17) ◽  
pp. 8043
Author(s):  
Hamed Hosseinnia ◽  
Behnam Mohammadi-Ivatloo ◽  
Mousa Mohammadpourfard
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Voltage Drop ◽  
Smart Meters ◽  
Active Distribution System ◽  
Parking Lot ◽  
Order Preference ◽  
Smart Parking ◽  
Low Efficiency ◽  
Demand Response Programs

By installing distributed generation (DG) sources in a distribution system, there is a change from the inactive state, accompanied by one-way power flow, to the active state, with the possibility of bilateral power flow. Authorities involved in the electricity industry manage the consumption side by bringing in particular programs called demand response programs. To implement these programs, it is crucial to create infrastructure, including the installation of smart measuring units in the consumption sector. In this paper, we investigate the optimal design of smart meters and combined hydrogen, heat, and power in the active distribution system to provide two functions aimed at reducing voltage drop and minimizing the total planning costs by taking different scenarios into account. In the combined hydrogen, heat, and power (CHHP)-based DGs, due to the low efficiency of the electrolyzer, its power is supplied by a smart parking lot (including wind turbines, photovoltaic systems, and batteries). To model the unit’s uncertainties, a long short-time memory (LSTM) model is employed. Utilizing the technique for order preference by similarity to ideal solution (TOPSIS), a state that enhances both functions is acquired from different scenarios. All of the simulations are carried out in two 33-bus systems.

scholarly journals Island division and multi-objective network reconstruction considering power flow entropy

2020 ◽  
Vol 309 ◽  
pp. 03007
Author(s):  
Linghui Yang ◽  
Yun Wang ◽  
Min Wang ◽  
Chao Wu ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Power Supply ◽  
Distribution System ◽  
Power Flow ◽  
Voltage Drop ◽  
Network Reconstruction ◽  
Load Level ◽  
Binary Particle Swarm Optimization ◽  
Line Load ◽  
Set Up ◽  
Node Voltage

Modern power system can identify component faults, isolate faults and resume operation quickly. In view of the problem that the distribution of line load in distribution network is not reasonable and it is easy to fall into the self-organized critical state, this paper introduces power flow entropy as an evaluation index to measure the robustness of power network reconstruction. Based on the power supply capability and node load level of distributed power supply in the process of network reconstruction, a strategy of island division is proposed. Then, a mathematical model is set up to minimize power flow entropy, network loss and node voltage drop, and the problem of network reconstruction after fault is solved by the improved chaos theory and binary particle swarm optimization algorithm. Finally, an example of IEEE-33 node distribution system is given to verify the feasibility of the proposed strategy and the effectiveness of the algorithm.

Smart distribution system operational scheduling considering electric vehicle parking lot and demand response programs

2018 ◽  
Vol 160 ◽  
pp. 404-418 ◽  
Author(s):  
S. Muhammad Bagher Sadati ◽  
Jamal Moshtagh ◽  
Miadreza Shafie-khah ◽  
João P.S. Catalão
Keyword(s):  
Electric Vehicle ◽  
Demand Response ◽  
Distribution System ◽  
Parking Lot ◽  
Demand Response Programs

scholarly journals Stability Analysis of 20 kV System at PT PLN (PERSERO) Rayon Muaralabuh before and after Interconection by IPP (PLTMH PT. SKE)

2018 ◽  
Vol 215 ◽  
pp. 01020
Author(s):  
Arfita Yuana Dewi ◽  
Asnal Effendi ◽  
Ridwan
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Voltage Drop ◽  
Rapid Development ◽  
Peak Load ◽  
Electrical Energy ◽  
Before And After ◽  
West Sumatra ◽  
Owned Company ◽  
The Stability

In the rapid development of the world as it is today, the electricity has a very important role in supporting people activities. PT PLN (Persero), which in this case as Government State Owned Company that directly manage the provision of electrical energy is required to be ready to face the development of electricity demand in Indonesia. In distribution system of electricity, problems often occure because of the length of line distribution system which cause voltage drop, technical losses, power losses, etc. One of them happened to PT PLN (Persero) Rayon Muaralabuh. Where the distance between the main substation (GI Solok) with the first connecting substation is ±110 KMS. This distance cause 9.62 % voltage drop during peak load. This nominal of voltage drop happens for just the first connecting substation that will be the source of division for all working areas of PT PLN (Persero) Rayon Muaralabuh. This factor encourages PT PLN (Persero) West Sumatra Area Solok to agree if Independent Power Plant (IPP) takes part in generating electricity, which will be distribute to PT. PLN (Persero) West Sumatera Area Solok Rayon Muaralabuh through interconnection system. The simulation of power flow using Etap 12.6.0 is used to analyze the stability of 20 kV system voltage at PT PLN (Persero) Rayon Muaralabuh before and after interconnection. Based on the result of simulation and Etap calculation, the highest voltage drop before interconnection by IPP is on Feeder express LubukGadang which is 13,71 %. After the interconnection by IPP, the voltage drop on that feeder becomes 4,326%, and the highest voltage drop is 4,855 %. Therefore, the voltage drop after the interconnection by the IPP already meets the standards allowed by SPLN No. 72 of 1987 which is maximum 5 % voltage drop. The precentage of technical losses in PT PLN (Persero) Rayon Muaralabuh before interconnection is 13,074 %, and after interconnection is decreased to 8,306 %.

Fault location in the distribution network based on power system status estimation with smart meters data

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Masoud Dashtdar ◽  
Seyed Mohammad Sadegh Hosseinimoghadam ◽  
Majid Dashtdar
Keyword(s):  
Power Flow ◽  
Fault Location ◽  
Voltage Drop ◽  
Distribution Network ◽  
Smart Meters ◽  
Fault Resistance ◽  
Different Types ◽  
Bus Networks ◽  
Types Of Faults ◽  
Proper Performance

Abstract Due to the existence of different branches in the electricity distribution network and only available voltage and current information at the beginning of the line and lack of access to the information at the end of the network line, the detection of the faulted section in the distribution network has become more important. Today, smart meters are used to measure the voltage and current of network lines, but due to the limitations of the installation sites, these devices are not possible in all network lines. In this paper, two techniques have been used to identify the faulted section and fault location in the network so that the fault distance at the beginning of the line can be estimated by estimating the current at the end of each network line. Therefore, in this project, by installing smart meters in the main branch of the network and also the information obtained from power flow in the network normal mode, it has been tried to practically estimate the voltage and current at the beginning and end of each distribution network line. In this method, more power flow is used to calculate the voltage drop of the lines and estimate the voltage and current at the end of the network lines so that the faulted part can be identified. Finally, the proposed method is implemented on the IEEE_15, 37 bus networks, the results of which show the proper performance of the proposed method in estimating location and Fault resistance for different types of faults in the distribution network.

scholarly journals Increased Resilience Using Close Loop Renewable Microgrids in the Surabaya Distribution System as a Self-Healing Application

2021 ◽  
Vol 2117 (1) ◽  
pp. 012026
Author(s):  
D F U Putra ◽  
A Soeprijanto ◽  
O Penangsang ◽  
R Delfianti ◽  
N H Rohiem ◽  
...  
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Voltage Drop ◽  
Flow Analysis ◽  
Binary Particle Swarm Optimization ◽  
Self Healing ◽  
Calculation Algorithm ◽  
A Value ◽  
Network Operations ◽  
Distribution System Reconfiguration

Abstract Distribution system reconfiguration has two main objectives, namely as optimization of network operations and as system recovery in case of disturbances. It is necessary to consider the reconfiguration process and the process of using Distributed Generation (DG) or microgrid as an additional supply to reduce the possibility of failure, loss of power, or a voltage drop. Therefore the first step in research This results in the candidate bus 14 and bus 52 on the Mulyosari feeder which must be reconfigured by cutting off the flow at L13 and L50 because the losses on both buses are the worst with a value of 0.01370MW and 0.00900MW using the calculation algorithm of Binary Particle Swarm Optimization (BPSO) to predict the location of possible failures and the placement DG, and selected on bus 29 and bus 45 which were injected DG with a PV capacity of 15 kW each, after the self-healing was applied to the system, power flow analysis was carried out, and get good results g is very satisfactory with the total losses in the system decreased from 0.363MW to 0.116MW from this study we can conclude that self-healing can only be done if the distribution system is a complex radial.

Development of a Simplified Calculation Tool for Voltage Drop caused by Transformer Inrush in Distribution System

2012 ◽  
Vol 132 (2) ◽  
pp. 197-206 ◽  
Author(s):  
Yoshiki Nakachi ◽  
Takayuki Fukae ◽  
Toshinori Sugahara ◽  
Hayato Nakamura ◽  
Mitsuaki Koyama ◽  
...  
Keyword(s):  
Distribution System ◽  
Voltage Drop ◽  
Simplified Calculation

scholarly journals Photovoltaic Maximum Penetration Limits on Medium Voltage Overhead and Underground Cable Distribution Feeders: A Comparative Study

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3843
Author(s):  
Sultan Sh. Alanzi ◽  
Rashad M. Kamel
Keyword(s):  
Power System ◽  
Power Factor ◽  
Distribution System ◽  
Power Flow ◽  
Underground Cables ◽  
Overhead Lines ◽  
Medium Voltage ◽  
Load Power ◽  
Bus Voltage ◽  
Pv Penetration

This paper investigates the maximum photovoltaic (PV) penetration limits on both overhead lines and underground cables medium voltage radial distribution system. The maximum PV penetration limit is estimated considering both bus voltage limit (1.05 p.u.) and feeder current ampacity (1 p.u.). All factors affect the max PV penetration limit are investigated in detail. Substation voltage, load percentage, load power factor, and power system frequency (50 Hz or 60 Hz) are analyzed. The maximum PV penetration limit associated with overhead lines is usually higher than the value associated with the underground cables for high substation voltage (substation voltage = 1.05 and 1.04 p.u.). The maximum PV penetration limit decreases dramatically with low load percentage for both feeder types but still the overhead lines accept PV plant higher than the underground cables. Conversely, the maximum PV penetration increases with load power factor decreasing and the overhead lines capability for hosting PV plant remains higher than the capability of the underground cables. This paper proved that the capability of the 60-Hz power system for hosting the PV plant is higher than the capability of 50 Hz power system. MATLAB software has been employed to obtain all results in this paper. The Newton-Raphson iterative method was the used method to solve the power flow of the investigated systems.

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