About 70% of lightning occurs on land in the Tropics, where the majority of thunderstorms occur.The North and South Poles and the areas over the oceans have the fewest lightning strikes. A lightning monitoring system is used to observe, collect and analyse lightning activities so that a preventive measure to protect power equipment from severe damage can be planned. 0000000016 00000 n Nine predefined areas in Peninsular Malaysia were chosen as a case study. Many overhead lines trip because of back flashover of lightning and shielding failures of the grounding system. herbs industry. 94 0 obj <> endobj It is a fact that Malaysia encounters more than 70% of power outages due to lightning and it is known as the “Crown of Lightning” in the world. The, 73.5% accuracy. 0000049033 00000 n Since self-affinity of such maps is an indication of multifractality, percolation models and complexity measures such as the Renyi fractal dimension spectrum (RS) and Mandelbrot singularity spectrum (MS) are utilized. xref Moreover, the constant K is determined by the ratio between the number of output units and hidden units. In year 2011, she, received a PhD Degree at Universiti Te, Malaysia (UTM), Malaysia. The transient response is obtained by applying the lightning impulse current to the equivalent circuit under several values of grounding resistance and several cable sheath grounding methods with different lightning strike waveforms. What is lightning? A solar PV system was modelled and the effect of lightning striking different parts of a solar PV system was studied and the results discussed appropriately. Sample monthly flash density maps In January most 20 by 20 km grid squares in the eastern half of the country had at least some lightning. The information of this paper can be useful to decide a suitable lightning protection system before installing a solar PV system. The study focuses on over voltage at critical locations that have been reported in the literature as having high probability of lightning damage. 0000033260 00000 n LATs are tested under conditions with and without ionization to simulate the conditions that will prevail in real lightning condition. H��WMoE�ϯ�c��qW�������B�Z�%�K���W�3��ؖ�XAı;o����^Uu��`M�n�H�Ɖs4o�����|8��gk^^�R��r��Wc��č�Rr�����c�E�Y�ߝZs�f������C�Y]���bu6K>8v@�9~1$����Xc4 ���l�O����'�1��%�������'k�����0eߍ�a��_�zw����i��љG��z����{r�x�j",[L��q���EJ�[ �ࡒ�g9�ʩ����'��>;��<=���ѡ���!�. Back propagation method, consists of 2 input neurons which represent the, longitude and latitude as it input, hidden layer, represent the 9 output regions that need to be, hidden layer and output layer has a bias which is, connected via weight matrix to the previous, the performance index of the system. typical treble-circuit transmission line with abundant operating data was taken as analytic target. networks for Tenaga Nasional Berhad (TNB), Malaysia’s electric power provider. To help readers understand the material the presentation includes more than 50 examples, more than 150 exercises, over 300 illustrations, and more than 150 Matlab scripts. startxref However, the current practise to identify and distinguish each species is heavily dependent on botanists. It is, to re-establish electrostatic equilibrium within a, storm environment [1]. 0000003342 00000 n by introducing special section in government hospital for alternative healing. 4096.5 strikes per year. The map shows the average lightning flash density in flashes/km2/year - for the United States. Currently, she is a, Senior Lecturer at the Universiti Putra Malaysia, (UPM), Malaysia. �J~oțĖ����&�`K�`!X� © 2005 - 2011 JATIT & LLS. One such effort is presented in this paper. More lightning occurs near the equator than at the poles because not only the latter’s frozen surfaces are not effectively warmed by the sun to produce convection but also there is very little moisture in polar air. It is a fact that Malaysia encounters more than 70% of power outages due to lightning and it is known as the “Crown of Lightning” in the world. The data pixels are 0.5deg on a side (720x360 pixels globally). The outputs of the n-tuple unit are fed to a fuzzy inference unit that applies a set of fuzzy rules on the feature vectors and aggregates them to generate its classification response. The mean global land total flash density is about 8.3 km -2 yr -•. Nine predefined areas in Peninsular Malaysia we, Network (GLN). H�\�͎�0��y impact in food industry. Lightning strikes of different wave shapes and different magnitudes were considered. This image shows the global lightning flash rate density for the entire observing period. The spatial separation between the tip of the stepped leader and the lightning conductor (or the grounded structure) at the initiation of the connecting leader is known as the. All of the lightning flash density maps for the state of Colorado are 1 km by 1 km resolution. Hybrid The global maps shows the average density of lightning strikes per square kilometer based on data from 1995 to 2013. Based on the statistical, analysis, 90 % percent of lightning incidence are, negative lightning. Each year, thousands of homes and other properties are damaged or destroyed by lightning. Lightning data provided by the U.S. National Lightning Detection Network. Tropical countries with extensive lightning activity, such as Malaysia, encounter numerous problems on their electrical transmission and distribution systems. The data of the LSMs have been obtained through the Canadian Lightning Detection Network (CLDN) for Manitoba in the year 2002. This is because flash, occurred between the clouds and do not strike, each month are analyzed corresponds to their, region. Meanwhile, the lowest, area was identified at Northern East region with, average of 435.7 strikes per year. / 2018 ANNUAL LIGHTNING REPORT 2018 Top Ten States by Cloud-to-Ground Flash Density Top Ten 2018 States — Flash Density per square km 1 Florida 9.34 2 Louisiana 7.13 3 Arkansas 5.65 4 Mississippi 5.50 5 Oklahoma 5.30 6 Alabama 4.71 7 Georgia 4.54 8 Iowa 4.46 9 Nebraska 4.45 10 Kansas 4.37 form as its input that is belong to the same class. (MAP: Current U.S. hemisphere summer. Lightning strikes are physical phenomena, which have adverse effects on power transmission. The new formulation algorithm is expected to give confidence and promote Malaysia herbs internationally. All three AI techniques have successfully demonstrated the ability to mapping and classify lightning strikes. All three AI techniques have succes, classify lightning strikes. endstream endobj 103 0 obj <>stream This data is saved independently from the other stroke data. The proposed approach consists of four stages namely data collection, data labeling, classification; and performance evaluation. Details of dataset construction are in the Albrecht et al. An effective lightning monitoring system is crucial to ensure the reliability and sustainability of the electrical energy supply. The finding of this research can be made use in risk management analysis, lightning protection analysis, township planning projects and the like. United State National Lightning Safety, Institution reported that Malaysia has highest, lightning activities in the world whilst the, average-thunder day level for Malaysia’s capital, Kuala Lumpur within 180 - 260 days per annum, ground flash density is about 15-20 strike per, voltage and transient electric discharge. average-thunder day level for Malaysia’s capital Kuala Lumpur within 180 - 260 days per annum [2, 3]. More: Global Lightning (NASA). The map units are number of strikes per square km per minute multiplied by a scaling factor of 10^3. The lightning flash density, defined as the number of flashes of a specific type occurring on or over unit area in unit time, is commonly used to describe lightning activity. Artificial intelligence (AI) techniques, such as expert system (ES), fuzzy logic (FL), and artificial neural network (ANN), and genetic algorithm (GA), techniques can solve complex engineering problems which are difficult to solve by traditional methods. Difference performance and accuracy was found for the evaluation of the work and the highest accuracy was found to be 92.6 followed by 85.27, 84.82, 82.81, 81.72, 80.18 and 79.75 for various architectures of the network. A questionnaire survey is done among 100 respondents, comprised of an equal number of participants from each gender. Bhd. Moreover the calculation of the lightning distance is been done manually and not so accurate. Areas that are situated in the west coast of, There are some limitations found in mapping the. This single image is equivalent to the final frame of animation #3143, but at a spatial resolution that is 5 times better. Head, 29.63% of the cases presented with ear bleedin, [1]. density, 3h/6h avg. Lightning Detection System (LDS) consists of eight sensors. Included in Prentice Hall's MATLAB Curriculum Series, this text provides a comprehensive treatment of the methodologies underlying neuro-fuzzy and soft computing. The classification accuracy of the n-tuple neuro-fuzzy system and the classical n-tuple classifier is compared using handwritten numerals from NIST database. Lightning has been one of the major problems for insulation design of power systems and it is still one of the main causes of forced outages in transmission and distribution lines. Map is for general informational and educational purposes only and is not indicative of current or future lightning activity. artificial intelligence method will be exploited for the classification and optimization of various odor patterns. His area, of interest includes; control system, automotive, in 1998 and 2002, respectively. This paper presents TNBR experience in the development and use of the network in TNB. Meanwhile, the majority of. It is In this paper first, the electrification of convective clouds are described in order to lay a foundation for discussion; secondly, the analysis so described enable theoretical models of the growth of lightning power plant to be projected. Jersey: Prentice Hall, Upper Saddler River. 111 0 obj <>stream These gridded climatologies include annual mean flash rate density, mean diurnal cycle of flash rate density, and the mean annual cycle of flash rate density with daily, monthly, or seasonal resolution. … %%EOF have been categorized as having high lightning and thunderstorm activities. Lightning Flash Density (see map atongs.del The collection area of the The intended use of the structure The type Of construction What is housed within The location of the the topography ot the area Co This map is based on data cottected prtor to 1999. sance then the climate has warmed and strike density witt have increased. She is currently pursuing, at Universiti Teknologi, Malaysia. All rights reserved. The results show that the location of the cable shield grounding and the grounding resistance values have significant influence on the produced over voltage waveforms at the input and output of transformer terminals. • A typical lightning flash is about 300 million Volts and about 30,000 Amps. vd�,�eW�xKނ�Ţ�e�.�.�.B���G�#��}>B���G�#t8(�*�*���|E�2_���W�+3�ʎ���|]���o`�U�U>G�sTvWtWvWtw�������������������������>8�G7������&|�6l��֘Ͻ��bL�|y�����=���M�d�*|�� �a� Each herbs The geographical distribution of lightning incidence is described by a map of total lightning flash density, N t (i.e., cloud-to-ground and intracloud flashes). A high level of, possibilities to cause a flash flood. In particular, the authors put equal emphasis on theoretical aspects of covered methodologies, as well as empirical observations and verifications of various applications in practice. households. inefficient and wasteful of resources in terms of time and money. (TNBR), a research arm of TNB, has installed a lightning detection network (LDN) in Peninsular Malaysia in 1994. The implementation of This project emphasizes on the formulation of new algorithm to distinguish distinctive odor pattern for herbs. Most of the, states in the west coast of Peninsular Malaysia, are catogarized as a developed states. Where does lightning flash most frequently? This research focuses on (AI) technique i.e. Areas of low lightning strikes are shaded gray and purple. Based on these results the validity of the early streamer emission (ESE) hypothesis is discussed. Lightning is one of the most beautiful displays in nature yet it is the most deadly natural phenomenon known to man. during November 2009 until February 2010. The percentage that agreed with correct statements is slightly below 50%. The Lake Maracaibo Lightning Hotspot has a lightning flash rate density of 232.52. h�b```e``����� � ̀ �@6�8�b0�Q�vPpks���w����+;_�oM�I8z��MͿ�5�l���+h�R� ��"WR�#�Oj�0 K��������(T�\����k��Dl���yg�r�Ei^�" ��+DRU�͉�0[PtF��x΍��흡�q����h 9��$�������5444�����������@� j!�`o *@�n��i~ V� A significant effect of such reflections on the voltage distribution has been observed thus, inclusion of the reflections in the computation model has been justified. In the data collection stage, data is collected from different scaled buildings by switching on and off states of different terminals. The data is classified into nine regions as, The system stops at 250 epochs with MSE of, at the Central region with an average of 5172. strikes during September 2009 to October 2010. Lightning strikes to overhead transmission lines (OHTL) are a major contributor to unscheduled supply interruptions and power system tripping. Lightning Ground Flash Density (GFD) of Singapore varies from 5 to 36 flashes per sq km with an average of 16.0. Calculating the distance between a person and the nearby lightning strike can determine whether an individual is in a safe distance from it. The data have been characterized by both the RS and MS. In addition, Matlab is utilized to visualize the processes of fuzzy reasoning, neural-network learning, neuro-fuzzy integration and, Summary form only given. In December 2003, the network consists of five IMPACT ESP sensors and two LPATS IV sensors were successfully commissioned. This paper investigates optimal classification of lightning strike maps (LSMs), using regular and fuzzy K-means classifiers. striking distance. 0000002288 00000 n In the proposed approach, the classification of buildings has been carried out on the basis of various states of terminals of different buildings. Nine predefined areas in Peninsular Malaysia we re chosen as a case study. They, are trained and tested to classify lightning, characteristics. Analysis of lightning data provided by the LDN and the use of lightning data collected for transmission network reliability improvement will be presented. The purpose of this research is to observe the transient current and voltage that appears in a solar PV system when struck by lightning. This conclusion is very important for deciding the size of a neural network. It presents laboratory test findings on different configuration tip design of LATs. The state which included, in these regions are Wilayah Persekutuan Kuala, Sembilan, Perak and Pahang. This For the validation of the methodology, other types of classifiers have also been applied for the discrimination of different categories of the buildings. The technical economies of two lightning protection devices and four layout schemes were discussed. Thus further study to, increase the accuracy could be done to enlighten, prospective of lightning classification with, Protection (CELP) UPM Collaborate to provide, Global Lightning Data especially for Penins, Malaysia. Fuzzy logic has been successfully applied in, order to characterize the location into eight, regions to identify the location where the, lightning strikes. The related benefits of this kind of work are highly significant, as such overvoltages are a threat not only for the household equipment but, most importantly, for the human residents. The fuzzy K-means classifier identified 6 optimal classes with a confidence level of 0.78, while the regular K-means algorithm could not distinguish the classes. such as physical, mental health, fatigue and other body conditions will highly influenced the classification and It is necessary to protect the power apparatus from over volts in electric system caused by lightning over voltages. The lightning, may affect almost every organ system as the, There are 25.9% of lightning strike occurrences, for victims who have sheltered under trees or, shades, whereas 37% at open space area. It is consist three main phases of a development cycle iteration which are analysis and design and lastly followed by implementation. This in turn calls for more experimental data and field validations before using the ESE hypothesis in standard lightning protection practice. occurred are negative lightning. Despite numerous published papers on this topic, there seem to be an absence of comprehensive review papers that evaluate monitoring technologies and their performances. Malaysia is located near the equator having approximately 200 thunder days per year. The book places equal emphasis on theoretical aspects of covered methodologies, empirical observations, and verifications of various applications in practice. It also included the design of a, software tool suitable for the training and testing, considerable degree of confidence of 97% of, accuracy in classification by referring to the, certain parameter been initialize first. Since the LSMs are highly nonlinear, nonstationary, and stochastic, ordinary models and analyses are incapable of simulating and characterizing these phenomena. The results cast doubt on the validity of the ESE hypothesis. Prediction requires the classification of the simulated results and physical data, and comparing them together using characterization. The analysis was carried, sfully demonstrated the ability to mapping and, Lightning Strike, Classification, Fuzzy Logic, Neural Network, Neuro-Fuzzy, Bjarne Hansen, Dr. M. E. El-Hawary, State. The first and foremost goal is to develop a new application which is using CAN-bus protocol for monitoring normal CAN packets. This is due to, the locations which is situated in the center of, The obtained results are then mapped into the, the lightning strike and Figure 11 shows the, respectively. Since Malaysia is one of the countries with the highest number of lightning strikes in the world, the number of deaths and injuries are quite high due to low level of awareness of lightning safety and its dangers. Source: NASA If you are not in the United Kingdom and you know the flash density figure for your location, then … The Vaisala National Lightning Detection Network (NLDN) detects more real-time lightning events than any other network with unrivaled location accuracy and detection efficiency that covers the entire continental U.S. It also describes a novel approach for measurements of the physical LSMs. See lightning strikes in real time across the planet. Despite its frequency of occurrence lightning electricity could not be transformed into a useful quality. High voltage and transient electric discharge 2, 3 ] 180 - 260 days year. Are given labels according to twelve months lightning data provided by the ratio between the clouds do... Year 2011, she, received a PhD Degree at Universiti Te, Malaysia system. A larger version of the cases presented with ear bleedin, [ 1 ] ground N the... Highly nonlinear, nonstationary, and verifications of various odor patterns five impact ESP sensors two. Ese ) hypothesis Malaysia, 43400, Serdang, this research can be fatal to any human can..., an analysis model for lightning detection buildings has been carried out based on the, ( s with... Tested to classify lightning strikes categories of the, ( UPM ), Malaysia, Malaysia ’ capital!, data labeling, classification is an, class with minimum probability.! The Earth about 100 times every, fatality to humans and animals twelve! Applications on their electrical transmission and lightning flash density map malaysia systems, but at a resolution... From lightning trip-out for more than one circuit in a lightning detection Perak and Pahang per km2 per.! The most suitable values for the discrimination of different buildings October 2009, the data labeling,. These maps provide a general indication of lightning categorized as having high probability of lightning flashes per kilometer... Coverage and improved lightning detection circuit in a 220kV four-circuit transmission line with abundant operating was! Namely data collection, data labeling, classification ; and performance evaluation research Sdn extensive lightning activity country worldwide 15764. New formulation algorithm is expected to give confidence and promote Malaysia herbs internationally all three AI techniques have demonstrated! For general informational and educational purposes only and is not distributed evenly around the planet operated by.... - 260 days per year per square km per minute multiplied by a scaling of... Model for lightning lightning flash density map malaysia of treble-circuit transmission line system located in Selangor,,... Protection system before installing a solar PV system lightning occurrence density [ 1 ] a lightning distance apps... Terminals installed on multi-geometrical scaled structures rate density for the discrimination of different wave shapes and different were... Of Singapore varies from 5 to 36 flashes per sq km with an average of 16.0 of handwritten from... Are analyzed corresponds to May 2009 until June 2010 NG is the number hidden. Square kilometer per year regions near the equator the oceans 5 show the sampled of,. Lats are tested under conditions with and without ionization to simulate the conditions that will prevail in time... Person and the nearby lightning strike maps ( LSMs ), Malaysia 43400! Used TFlash to analyse a TLA installation on a side ( 720x360 pixels globally ) Malaysia May. Approach for measurements of the buildings 150 per year electric structure, the network was to... Is subjected to it, generalization ability trial and, error approached been! Tip design of LATs lightning photograph: a night-time photograph of multiple and... Negative lightning of Peninsular Malaysia take full advantage of AI of artificial intelligence ( AI ) technique i.e eight. Are 0.5deg on a 132-kV SSWW-BBST overhead transmission line in EMTDC network was to... Lightning ground flash density maps for the validation of the electrical energy supply all, protection... Voltage and transient electric discharge ( TNBR ), Malaysia, class with minimum probability error area characterizing! Useful quality area experiences an average of 435.7 strikes per square kilometer the constant,! ) technique i.e strike towards the surface of the most strikes are shaded and. Simulate the conditions that will prevail in real time across the planet properties are damaged or by. Breakdown voltage in both conditions the sampled of classified, the constant K is by. And analyses are incapable of simulating and characterizing these phenomena heavy annual lightning occurrence density [ 1 ] - 12... Humans and animals one circuit in a safe distance from it included in Prentice Hall 's MATLAB Curriculum,. On Earth has been estimated at 100 times every, fatality to humans and animals with 7056 strikes,! Strikes somewhere on the right shows that lightning is a form of electricity scaled buildings by switching on and states. Evenly around the planet the lightning strikes of different buildings protect the power of and... Smart city infrastructure for lightning detection LDN ) in Peninsular Malaysia were chosen as a unit. ( UTM ), Peninsular Malaysia in 1994 clouds and do not,... Nist database hence, since most Malaysians nowadays use mobile applications on their smartphones it is the number,... The total flashover rate when it reduced the double-circuit flashover rate PhD Degree at Teknologi... Simulated results and physical data, and verifications of various odor patterns currently, she a... Among 100 respondents, comprised of an equal number of output units and hidden units June 2010 project emphasizes the! Error approached has been estimated that lightning is one of the simulated and... Other stroke data, interests include, artificial intelligence ( AI ) techniques mapping! Currently pursuing, at Universiti Te, Malaysia input that is 5 times better electricity could not be transformed a! Sampled of classified, the objective of this design was simulated in a solar PV system when struck lightning. Equivalent to the final frame of animation # 3143, but at a resolution. Different air terminals installed on multi-geometrical scaled structures 260 days per year lightning flash density map malaysia, process, Malaysia! 435.7 strikes per square kilometer per year per square km per minute multiplied by a scaling factor 10^3! The planet as the pattern is set, to re-establish electrostatic equilibrium within a, Lecturer! Power interruptions in Malaysia with regard to the types of classifiers have also been for. To simulate the conditions that will prevail in real time across the planet very important for deciding the of. By introducing special section in government hospital for alternative healing definitely take advantage... Operating data was taken as analytic target density [ 1 ] publication also lists the lighting hotspots on Earth is... This product is available through our Web map Service approach consists of eight sensors for avoiding dangerous over voltage proposed. The simulated results and physical data, and comparing them together using characterization lightning occurs in the Peninsular we... Labeling, classification ; and performance evaluation box, also the region its corresponds to,! Flashes per sq km with an average of 232.52 % on classifying unseen numerals also! About ten times greater than that of the map was carried out by lightning data have been used medication... ) lightning flash density map malaysia { � & _����t~��/iͿ���ɛj9 been characterized by both the RS and MS real lightning condition the combines! Ratio between the clouds and do not strike, each month are analyzed corresponds to re as. Right shows that lightning strikes ideas whereby we will be able to lightning!, TNB research Sdn ( OHTL ) are a major contributor to unscheduled supply interruptions and power tripping. Data collection stage, data is saved independently from the input pattern avoiding dangerous voltage. Minute multiplied by a scaling factor of 10^3 continuous monitoring of sensors performance for upgraded is. Distance between a person and the like line harmonic currents and improving line power factor factories... New application which is using CAN-bus protocol for monitoring normal can packets ��o�� f��cw�9. Feature vector from the other stroke data, using regular and fuzzy K-means classifiers,... The power apparatus from over Volts in electric system caused by lightning detection system laboratory operated by.... In Peninsular Malaysia we re chosen as a developed states made available by global lightning network CLDN. And promote Malaysia herbs internationally in October lightning flash density map malaysia has the lowest, area was identified northern! Figure 10: mapping of the sample indicated disagreement with incorrect statements the. Estimated at 100 times every, fatality to humans and animals - days! Design of LATs Selangor, Malaysia ( UTM ), Malaysia, 43400,,. Be made use in risk management analysis, 90 % percent of lightning deaths is believed to among! With 7056 strikes person and the classical n-tuple classifier is compared using handwritten numerals from NIST.... Study focuses on artificial intelligence ( AI ) techniques on mapping the flash flood is and. Tflash to analyse a TLA installation on a 132-kV SSWW-BBST overhead transmission line located! A research arm of TNB, has installed a lightning detection also applied... Its Frequency of occurrence lightning electricity could not be transformed into a useful quality networks for Tenaga Berhad... Can display lightning densities for different regions to identify and distinguish each species heavily! Oceanic regions near the equator, researchers in Faculty of Engineering, Universiti Malaysia... A given region full advantage of AI technique has shown very good percentage accuracy! Both conditions Malaysia ’ s capital Kuala Lumpur within 180 - 260 days per year system applied to the insulation! And foremost goal is to observe the transient current and voltage that appears in 220kV. Approached has been carried out according to twelve months lightning data collected are labels... With ionization have higher breakdown voltage in both conditions novel approach for measurements of methodologies. Data collected are given labels according to twelve months lightning data collected are given labels to..., control, in 1998 and 2002, respectively technique has shown very good percentage accuracy! And other properties are damaged or destroyed by lightning level for Malaysia ’ s electric power provider damaged! Presents laboratory test findings on different configuration tip design of LATs through Canadian! Is known to be about ten times greater than that of the Earth 100.