First, introduction

Along with the science and technology unceasing development, the monolithic integrated circuit technology day by day consummation, in the electric power profession to the power station, the transformer substation equipment proposed higher is precise, the high grade request, the direct-current power supply screen is the power station, transformer substation two equipment Central Africa often the important equipment, the direct-current power supply screen undertakes to the power station, the transformer substation is providing the direct current control to protect the power source the function, simultaneously provides to the high-voltage switch and the circuit breaker operation power source, therefore the direct-current power supply screen reliability directly will relate the power station the safe operation, the direct-current power supply screen development has already experienced the very long time, From the early continuous current dynamo, the magnetic saturation direct current battery charger to the integrated circuit silicon-controlled rectifier control direct current battery charger, the monolithic integrated circuit control silicon-controlled rectifier battery charger, the high frequency switching power supply battery charger and so on, has been very mature to at present direct-current power supply screen.

Wecon man-machine contact surface pushing to the market, causes originally in the very mature electric power profession direct-current power supply screen to mount a new stair, the product quality and the scale enhanced a very big level.

Second, system disposition

By the wecon man-machine contact surface the direct-current power supply screen which for the core operation, the demonstration contact surface is composed mainly important partially is composed by following several: Wecon man-machine contact surface, Simens PLC, input output simulation quantity and switch quantity gathering, high frequency switching power supply module.

Third, system characteristic

The direct-current power supply screen rectification charge partial still uses the present international most popular soft switch technology, underwent the multistage transformation the labor frequency exchange, finally formed the stable direct-current output, the direct-current power supply screen systems control core part was Simens programmable controller PLC, it resembled the system gathering input output mold the quantity as well as the switch quantity after operation processing, finally controlled the high frequency switching power supply module to cause it and has the artificial establishment according to the battery curve the work requirement high reliably to work.

Between the direct-current power supply screen input output operation, various functions transformation operation as well as the many kinds of active status each kind of data display completes by the wecon man-machine contact surface, it mainly completes the following several tasks:

Will gather the direct-current power supply screen input output data through serial will transmit orally in the man-machine contact surface memory from PLC, besides will have in the man-machine contact surface interior leaves the plant already the system software platform which will install, but also will have produces the factory according to the system software to stipulate voluntarily will establish the application software, this application software according to the direct-current power supply screen work way establishment, its on-line demonstration direct-current power supply screen, the real-time data, including the high frequency switching power supply module input output voltage electric current, the battery voltage electric current, the control generatrix voltage electric current, 合闸 generatrix voltage and so on, moreover also will have the input power take-off valve active status, Various operating points active status as well as sends out under the malfunction reports to the police the condition, simultaneously the man-machine contact surface also may the real-time on-line establishment each kind of active status, like manual, automatic, be sufficient, 浮充 and so on, the establishment finished according to the preservation, its definite value forever will preserve in the man-machine contact surface memory, power cut this data not to lose.

Fourth, picture function introduction

1. opening machine pictures

The opening machine picture graphic display device model name, produces the factory

2. data displays picture

Real-time on-line demonstration each kind of data, including the charge way, the charging voltage, the module voltage, the module electric current, the battery voltage, the battery circuit, controls the female voltage, controls the female electric current, the module quantity.

The real-time on-line demonstration each kind of switch quantity data, including controls the female voltage breakdown, controls the female electric current breakdown, controls the mother to the place breakdown, is controlling the mother negative to the place breakdown, controls the female switch 脱扣, gathers the female switch 脱扣, controls the mother to input the switch to break, to gather the mother to input the switch to break.

3. parameters and hypothesis picture

The free time correct input password then enters the parameter hypothesis picture, may establish the parameter includes: The sufficient voltage, 浮充 on the voltage, the battery circuit, the battery voltage the lower limit, controls on the female voltage the lower limit, the dielectric resistance lower limit, the module switch machine and so on.

4. simulations charts picture

The simulation chart picture demonstrated the entire direct current system the work process, contains the exchange input, the module output, the control generatrix, 合闸 the generatrix, the battery and so on.

5. diagrams pictures

The diagram picture and the simulation chart picture has similarly many place, but it in detail described various parameter values size, including the module output voltage, the electric current, the battery voltage electric current, controls the female voltage electric current and so on.

Fifth, the use scope, the service condition and apply the experience and the experience

The wecon man-machine contact surface enormously enhanced the direct-current power supply screen reliability and 先进�?in direct-current power supply screen application, because the man-machine contact surface operation touches the pattern pressed key, therefore has overcome the life question which the mechanical pressed key switch machinery wears brings, moreover the man-machine contact surface large capacity memory as well as WINDOW software operated the platform enormously to enrich the direct current system function operation, caused its application software establishment to be extremely convenient, the application software had the very formidable transplant, this has brought enormous convenient for the engineering design, wecon man-machine contact surface in electrical power system direct-current power supply screen application, We may very clearly realize is extremely widespread to it in the electrical power system application prospect.

For example may apply in the generator excitation control serves as for the generator excitation adjustment operation and the demonstration, may apply in the power station, in the transformer substation synthesis automation protective device took the unit control interface and the long-distance control interface middle contact surface, soon in many units control the required quantity operation and the demonstration data transfer to the wecon man-machine contact surface in, from the wecon man-machine contact surface after analysis processing, transmits again to the long-distance control center, or sends to under the long-distance control center instruction in the unit control, in brief wecon man-machine contact surface along with time development, the people can be more and more many knew it, analyzes it, applies it, Causes it the function which displays it in the electric power profession and in the national economy development other professions to be supposed to have, makes the contribution for the national economy development.