Unesco eolss sample chapters electrical energy systems components and substations for electrical transmission and distribution systems b. Pdf a new approach for substation expansion planning. The intelligent electronic devices ied record the measurements of the traveling wave during fault condition using comtrade recorder. What is a wave trap in a substation and how does it work. Bpl telecom has line traps starting from the range of 400a upto 4000a with inductance rating of 0. Wave trap is an instrument using for tripping of the wave. This paper presents a new architecture of distribution.
Line trap line trap also known as wave traps a critical component of plcc. These frequencies are equivalent to the txrx frequencies of the local powerline carrier transceiver. Electrical energy systems components and substations for electrical transmission and distribution systems b. A wave trap is a parallel resonant circuit installed on the powerline at the local substation. Line traps are cylinderlike structures connected in series with hv transmission lines. It is tuned to resonate at a specific frequency or frequencies. It is a combination of low inductance in series and high capacitance in parallel with transmission wires in power. In the fault situations the electric apparatus and systems become dangerous to humans. Tibco substation es subscribes to and publishes data to tibco applications and transaction processing systems, such as customer information control system cics and information manageme nt system ims, which run in the zos operatingsystem environment. The main function of the line trap is to provide a high impedence at powerline carrier frequencies.
Moreover, the standard supports the free allocation of functions and accepts any system philosophy. In 26 iec 61850 is used in the primary substation, like the grid protection, monitoring application, and. The line trap acts as a barrier or filter to prevent signal losses. A ground fault relay in conjunction with the ngr provides ground fault and resistor open circuit protection by tripping the shunt trip coil of the primary load break switch.
It is a combination of low inductance in series and high. Modeling and analysis of a 3phase 2kv gas insulated. A line trap highfrequency stopper is a maintenancefree parallel resonant circuit, mounted inline on highvoltage hv ac transmission power lines to prevent the transmission of high frequency 40 khz to khz carrier signals of power line communication to unwanted destinations. How does the wave trap work at an electrical substation. Underwater substation system for wave energy converters thesis pdf available march 2010 with 4,972 reads how we measure reads. Carrier wave communication uses up to 150khz to 800khz frequency to send the all the communication. Practical considerations in applying iec 61850 for. Recommended set of shortcircuit endurance csn 38 1754, csn 33 3015 rated switchingoff current i nvyp ka rms value, its heat impacts must be survived by an electrical equipment for a.
Protection of smart substation based on wlan complies with. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Medium voltage products technical guide the mvlv transformer. Practical considerations in applying iec 61850 for protection. This manual shows you how to configure tibco substation es.
Wave trap is a basket looking coil having high inductance. Power line carrier communicationwith awesome animation work. It is a combination of low inductance in series and high capacitance in parallel with transmission wires in power frequencies. Components and substations for electrical transmission and. Implementation of an offtheshelf solution for substation design which supports electromechanical, civil and electrical design. Hence a line trap unit wave trap is inserted between busbar and connection of coupling capacitor to the line. Wave trap is used to create high impedance to the carrier wave high frequency communication entering in to unwanted destinations typically substation. Uprating and expanding existing substations electrical. Prepared by the subcommittee on the design of substation structures of the. The wave trap is put in use alongwith a coupling capacitor or a capacitor voltage transformer cvt both of which possesses high capacitance value. The transformer used in the rectifier is feeder by power transformer substation in 44 kv and reduces the voltage level for 2,410 v. Since a wave trap or line trap is a currentrated device, it is undesirable to operate such equipment above the nameplate rating. Apr 28, 2012 power plants and substations are connected by high voltage power transmission lines which transmit power typically at 50 or 60 hz. Line traps are cylinderlike structures connected in series.
Apr 02, 2016 kel37 page 10 drag and ground it to the ground. Wave trap in electrical systems are used for power plant communication through transmission wires. For this tapping loss the characteristic impedance of the h. Jul 17, 2008 a wave trap is a parallel resonant circuit installed on the powerline at the local substation. The most important function of a line trap is to prevent the carrier signal from being.
Cumulative electric and magnetic fields at a given point in the substation are the result of the superposition of direct and reflected em fields. Some plc maintenance will require taking the transmission line out of. The inductive reactance of the line trap presents a high reactance to highfrequency signals but a low reactance to mains frequency. Wave trap definition a device, used with ccvts, that acts as a filter to prevent incoming signals from passing through a substationswitchyard to other power lines and mixing with other signals. Line traps are connected in series with the transmission. The fast protection system based on traveling wave for smart substation proposed in this article consists of intelligent relays, located at each line terminal connected to the substation. Study of harmonics generated in rectifier substation of. Substation design volume ii physical layout instructor. Power plants and substations are connected by high voltage power transmission lines which transmit power typically at 50 or 60 hz. Therefore this transformer has a sixphase output to supply a sixphase substation rectifier.
Topics changes from the previous release of this guide, page x related documentation, page xi how to contact tibco support, page xiii. A new approach for substation expansion planning article pdf available in ieee transactions on power systems 212. The function of this trap is that it traps the unwanted waves. The electrical substation is the part of a power system in which the voltage is transformed from high to low or low to high for transmission, distribution, transformation and switching. The solution will be based on implementation of an offtheshelf system or systems, with preparation for work at iec israel. Amos shows that this series tuned circuit gives a boost to frequencies above its resonant point and can be used to best advantage as a wave trap placed across the input. The coil of the line trap provides a low impedance path for the flow of the power frequency energy. Design of an ultra compact distribution substation p. This prevents carrier signals from being dissipated in the substation or in a tap line or branch of.
All rus borrowers rus electric staff effective date. The bidder shall also specify the bandwidth of the untuned line traps within which the tapping loss shall not exceed 2. A mv lv transformer electrical substation consists, therefore, of the. The system is designed to operate at either 33kv, 11kv or with one circuit at 33kv and the other at 11kv, therefore the substation includes an 11kv33kv transformer, shunt reactors, associated 33kv and 11kv. Insulated substation gis is different from that of the conventional substation because of certain unique properties of the former5. The power transformer, circuit breaker, busbar, insulator, lightning arrester are the main components of an electrical substation. The electromagnetic wave from maxwells equations contd 2 2 t e e w w u u 2 2 2 t e e e o o w w x ph xe 0 using the vector identity becomes, in free space and. Substation ground fault currents are limited by a continuouslyrated neutral ground resistor ngr connected to the transformer secondary star point. The surge arrester function is to protect the tuning.
Typically plc equipment will function in single function mode, but can be multiple. But communication signals are very low amplitude and very high frequency signals. Recommended set of shortcircuit endurance csn 38 1754, csn 33 3015 rated switchingoff current i nvyp ka rms value, its heat impacts must be survived by an electrical equipment for a given time t 2 s. Oct 10, 2014 wave trap consists of a number choke coils connected in series. Reference 3 provides a di erence in the requirements of the ethernet used in substation compared to the normal o ce ethernet.
It is connected in series with the power line and prevents carrier current from entering to the power equipment. Operation at the specified emergency allowable maximum temperatures will not significantly affect the. Correspondingly, the substation network should be designed to guarantee all the requirements of these messages. These lines are also used to carry communication and control signals for the operation of the grid local equipment status, readings, alarms and. The main function of the line trap is to present a high impedance at the carrier frequency band while. One of the devices employed in powerline carrier is the line trap, sometimes called a wave trap. In 26 iec 61850 is used in the primary substation, like. Current transients excite the 3d bus structure which acts as a complex antenna, radiating energy into the substation as transient electric and magnetic fields. The main function of the line trap is to provide a high impedence at powerlinecarrier frequencies. A line trap, also known as wave trap, or highfrequency stopper, is a maintenance free parallel.
The intelligent electronic devices ied record the measurements of the traveling. Stream tracks and playlists from trap wave on your desktop or mobile device. These lines are also used to carry communication and control signals for the operation of the grid local equipment status, readings, alarms and switching signals. The line trap shall be provided with a protective device which will be designed and. A line trap, also known as wave trap, or highfrequency stopper, is a maintenancefree parallel.
What is the use of a wave trap, coupling capacitor and. Tikhodeev encyclopedia of life support systems eolss into substation equipment systems. Compliance with all technical requirements all energize elements comply with the required clearances clearances verify compliance with the last requirements of the national electrical safety code or prepa diseno subw\copy of svc subst profile 2. In most cases of uprating, wave traps will require replacement. Line trap a line trap also called wave trap free parallel resonant circuit, connected series with high voltage transmission power lines to provide high frequency 40 khz to khz carrier signals of power line communication purpose. Tibco substation es configuration and resources ix preface this manual describes the configuration of the tibco substation es product, and also includes sample code and examples. Wave trap consists of a number choke coils connected in series.
Line trap materials have changed, and starting with ansi standards in 1981 operating temperatures and rises are better defined, nonetheless higher limiting emergency temperatures can accelerate deterioration of the wave trap. A ground fault relay in conjunction with the ngr provides ground fault and resistor open circuit protection. What it does is trapping the high frequency communication signals sent on the line from the remote substation and diverting them to the telecomteleportation panel in the substation control room through coupling capacitor and lmu. Its main goal, the interoperability between devices and tools, has been described in section 1 of this paper. The line traps are connected in series to the transmission line and are designed to carry the rated power frequency current, as well as to withstand the substation fault currents. The practical substations use bus ethernet and switched ethernet for communications. Likewise, since the transmission line wave equation is a linear. Wave trap is used for trapping the high frequency communication signals sent on the line from the remote substation and diverting to the telecomtele protection panel in the substation control room through coupling capacitor and lmu. These high frequency signal should not be coming on the buses as these may damage the equipments. Substation structures design loads references substation structure design guide 2008, asce manuals and reports on engineering practice no.
It is connected to the main incoming feeder so that it can trap the waves which may. This substation equipment has threephase windings, one in its primary side and the secondary side with two windings. Reference 25 studies different phy and mac enhancement in wlan to improve its performance in realtime applications. Substation equipment and its function 2 linkedin slideshare. Since the power flow is rather large at times, the coil used in a line trap must be large in terms of physical size. What is the function of wave trap in an electrical substation answer subrata. What is the function of wave trap in an electrical substation. Wave trap is installed in the substation for trapping the high frequency communication signal sent on the line from remote substation and diverting them to the telecom panel in substation control room. Depending on the function performed, it can be defined as a transforming, conversion, transmission or distribution substation. Wave trap filters the high frequency communication signals sent on the line from the remote substation and diverts them to the telecomteleprotection panel in the substation control room through coupling capacitor and lmu. It is connected to the main incoming feeder so that it can trap the waves which may be dangerous to the instruments here in the substation.
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