Cause analysis: voltage drop for common power quality problems, meteorological anomalies, short-circuit faults, power system failures, transformer switching, etc. may be triggered by voltage drop. Voltage drop phenomenon can not be completely avoided, and with unpredictability, need to use certain preventive management means, the probability of voltage drop and minimize the impact. An aircraft terminal building using 110kV substation step-down switching power supply, set up 8 substation room and 4 sets of special diesel generator sets, power supply reliability of more than 99.999%, but in the terminal building operation process, the frequency of voltage dips is still more than 10 times / year. Impact analysis: After voltage dips occur, the operation status of highly sensitive power equipment and systems such as baggage handling system, flight display system, escalator system, APM MRT system and lighting system in the terminal building will be affected to different degrees. Take the lighting system as an example. Lighting equipment in T2 of the Capital Airport is mostly gas discharge equipment, with extremely high voltage sensitivity. If the voltage is reduced to 65% to 80% of the normal voltage, it will cause all the lighting to go out; after the voltage is restored to normal, there is a time lag of about 5min for the lighting equipment to restart, which will have a serious impact on the operation order of the airport. Another example is the baggage handling system, real-time data exchange occurs between the terminal baggage handling system and the flight information system, which transmits the data to the PLC to regulate the baggage handling system. Voltage drop phenomenon occurs, will lead to system data exchange and transmission is blocked, part of the system module can not normally obtain action instructions and failure downtime. If the conveyor belt, sorting machine and other units downtime, need to manually repair, consume a lot of manpower, material costs, may also cause damage to passenger luggage, flight or trip delays and other issues.
2 Airport Terminal Voltage Dips Management Program
TPM-QSDVR Voltage Dips Protection System and TPM-Q510 Display Terminal can be used.
TPM-QSDVR Voltage Dips Protection System takes supercapacitor as the energy storage element, adopts advanced power electronic conversion technology and digital control technology, provides backup short-time energy storage solution, effectively manages the problems of voltage dips, voltage rises, and short-time interruptions, and has the characteristics of strong stability, high reliability, and high efficiency, etc. It is widely used in semiconductor manufacturing, petroleum and petrochemical industries. It is widely used in semiconductor manufacturing, petroleum and petrochemical industry, chemical industry, automobile manufacturing, precision machining, pharmaceutical industry, papermaking industry, medical and health care industry, scientific research institutes, tobacco industry, metallurgy industry, iron and steel industry, printing industry, glass industry, textile industry, and other industries which have stringent requirements on the quality of electric power.
Product features:
Fast response time, typical response time of 1ms;
Flexible compensation time, typical compensation time of 3s, more backup time can be customized according to customer demand;
Using super capacitor as the energy storage element, the number of times of charge/discharge of up to 1 million times;
Equipment redundancy design, high reliability;
Can simultaneously manage voltage dips, voltage rises and short-term interruptions;
Full-power design of the inverter supports 100% input three-phase voltage drop;
Voltage adjustment target value can be set on-site, with a factory default of -15%~+15%;
Electronic bypass efficiency of 99% or more under the working condition, significantly reducing the cost of power loss;
Maintenance-free, guard-free, saving labor costs.
TPM-Q510 display terminal, the display terminal set display, operation, setup and integration, supporting the latest anti-shaking contactor use, communication port to receive data, can be a multi-purpose. It can be connected to the background anti-shaking system through RS485. With year, month and day time display, equipment in operation, operating status, communication status, cumulative operating time, three-phase voltage display, in the event of equipment "shaking" fault records, but also according to the Gongyi parameter setting "shaking" time and voltage percentage.
The combination of these two products is very suitable for airport terminals, which can improve the perceived risk of voltage dips, detect anomalies at the first time and take timely measures to deal with them. The power monitoring system is installed in every opening and closing station in the terminal building to monitor the operating status of the equipment in the power supply system in real time, obtain the corresponding operating parameters, and dig out the abnormal signals through comparative analysis. For example, it can sensitively sense the phenomena of voltage interruption, sudden change, instability, etc., automatically give alarm prompts, and record the time of occurrence, duration and degree of drop of voltage transient phenomenon. Analyzing the various types of parameter information during voltage dips, we can grasp the law of voltage dips and accumulate theoretical information for the prevention and control of subsequent voltage dips.
Zhengzhou Taipu technology production of TPM-K anti-shaking contactor, TPM-Q510 display terminal and TPM-QSDVR voltage sag protection system, the combination of the three, can effectively protect the airport to avoid because of the problem of voltage sag, for the safe operation of the airport to do a power.