CN2150581Y - Watt-hour collecting and repeating device - Google Patents

Abstract

The utility model discloses an electric power watt-hour collecting and repeating device. The utility model is composed of a processor, a collecting circuit, a serial communication opening, a clock circuit and an electricity holding circuit. The utility model is characterized in that the precision is high; the electricity holding measures are adopted; the utility model is free from the influence of the operating mode; the watt-hour quantity from the wire can be correctly collected in a definite time interval; the data can be repeated. The utility model overcomes the insufficiency that the telemechanical installation has the disadvantages of low precision and no electricity holding measure. The utility model can be used for the power system operation field such as a power plant and a substation, and can also be used for the real-time signal acquisition and processing system in other industrial departments.

Description

Watt-hour collecting and repeating device

The utility model is that power system information is gathered retransmission unit, and the on-the-spot electric power electricity of particularly a kind of Operation of Electric Systems is gathered retransmission unit.

At present, existing electricity is gathered retransmission method two kinds: one, it is the pulsed quantity acquisition function that utilizes in on-the-spot (as generating plant, the transformer station) telemechanical apparatus of operation, the electric degree pulse of acquisition pulse watt-hour meter, be scaled electricity then, by communication port electricity be transmitted to the dispatching center again.As Nanjing automation equipment factory, the SZY-5 type emblem machine telemechanical apparatus that typing in 1986 is gone into operation; The MWY-C3 type emblem machine telemechanical apparatus that Nanjing Automation Research Institute is produced; Its two, be to receive the electricity indicated value that the electricity transmitter is sent here by telemechanical apparatus, send electricity then to the dispatching center.Aforementioned two kinds of methods exist deficiency in actual motion: (1) precision is low, and the anti-interference of telemechanical apparatus is poor.This is that disturbing pulse also can be counted sometimes because the electric degree pulse is not only lost but also can be repeated counting easily, so produce error, precision is low.Furthermore be because electricity is different from the characteristics that instantaneous flows such as electric current, voltage, power do not influence mutually in the value of different time, and electricity is an accumulation.When receiving the electric degree pulse, any tiny error of generation all can cause long-term inaccurate of electricity numerical value; (2) telemechanical apparatus does not have the electric measure of guarantor.When the on-the-spot dead electricity of operation, the uninterrupted power source that can only outerly connect was protected electricity 20 minutes, after 20 minutes, and the electricity loss of data in the telemechanical apparatus; (3) electricity of collection outlet is an electricity of gathering the switch of taking line out of.Gather electricity with telemechanical apparatus, have only that the method for operation is constant at the scene, when promptly fixing certain switch band bar outlet, just be suitable for.When the on-the-spot method of operation changes, when taking line out of by by-pass switch or bus connection switch, telemechanical apparatus continue to be gathered through the electricity of the former switch electricity as this outlet, rather than the electricity of the electricity of on-the-spot switch as outlet, therefore, can not correctly gather the electricity of this outlet; (4) can not gather the electric power electricity at times.In the production reality, need electric power electricity continuous data at times in a day, telemechanical apparatus can not be provided with the period easily, therefore, can not gather the electric power electricity at times; When (5) communication channel interrupts, can't learn the electricity numerical value of each time period.This is to gather the numerical value that electricity was obtained at that time because telemechanical apparatus only sends, and interrupts if telemechanical apparatus arrives the communication channel of dispatching center, and then the electricity numerical value of each period just can't be known by the dispatching center in the period at this section.

The purpose of this utility model is to provide not enough a kind of electricities such as the anti-interference that can overcome the telemechanical apparatus existence is poor, nothing is protected circuit to gather retransmission unit.

The utility model is realized by following measures.It includes and is used for processor, the Acquisition Circuit that is used for Information Monitoring that information is handled, the serial communication port that is used for the electricity data are mail to the dispatching center, it is characterized in that it also includes the clock circuit that is used to have of one's own the clock system and is used under the dead electricity situation, the guarantor's electricity circuit that ensures to the clock circuit power supply is formed.The information transmission that Acquisition Circuit is gathered is given processor, protects one tunnel information transmission of circuit and gives clock circuit, protects another road information transmission of circuit and gives processor, and processor is connected with clock circuit, serial communication port respectively, and information can be transmitted mutually.Its principle of work is: the photoelectricity coupled circuit in the Acquisition Circuit is at first delivered in the electric degree pulse that pulse electricity meter is sent here, and after the photoelectricity coupling, the pulse width discriminating circuit in the warp let-off Acquisition Circuit differentiates that the single-chip microcomputer that has only effective impulse just to deliver in the processor is counted.Adopt the photoelectricity coupled circuit, can make the isolated from power of power supply of the present utility model and pulse electricity meter open, prevent to influence each other, pulse is after the photoelectricity coupling, and amplitude drops to 5 volts, and width is constant.After pulse entered width discriminating circuit, the rising edge of pulse triggers width discriminating circuit to begin to differentiate, the pulse height negative edge triggers width discriminating circuit to be stopped to differentiate.Amplitude height, the narrow disturbing pulse of width will be counted by elimination like this, and qualified pulse can not be repeated counting.Single-chip microcomputer adopts the full mode received pulse signal that interrupts, thereby has avoided pulse missing.The effect of clock circuit is to have the clock system of one's own, and singlechip CPU can be provided with its clock truth of a matter.Singlechip CPU regularly reads the time of interior time of clock circuit as this device.Protecting circuit only works when dead electricity.The operation scene in the ordinary course of things can dead electricity, unless situation is very special, all on-the-spot outlets of operation this moment all do not have the electric weight transmission, and no electric degree pulse is for collection.When dead electricity, protect circuit only to storer and clock circuit power supply, the data in the storer are not lost fully like this, and the time in the clock circuit remains in operation.Behind power up, single-chip microcomputer at first reads the time of the time of clock circuit as this device, this sample device continues to gather electricity will be handled by the period, and by continuing the in store original data and the data of outage electricity in the storer is zero, thereby the aggregate-value of electricity can not produce error.When the method for operation changes, by on-the-spot operator on duty the method for operation after changing is imported with keyboard, the electricity of switch of taking line after then the utility model just adopts the method for operation to change out of is as the electricity of outlet, rather than the electricity of the switch of original tape outlet is as the electricity of outlet, and the electricity of the utility model collection can not be subjected to the influence that the method for operation changes like this.The operation operator on duty can be provided with the acquisition time section on keyboard, the utility model calculates the outlet electric degree value of different periods respectively according to being provided with, and has realized the function that segmentation is gathered.The utility model and the dispatching center between interrupted communication channel recover after, the operator on duty operates on keyboard through operation, can recollect the electricity data of day part in three days.The method of the utility model and telemechanical apparatus interface is with serial communication port the message pick-up that telemechanical apparatus mails to the dispatching center to be come in, and the electricity stacked data is added again, and mails to the dispatching center with serial port.If the operation scene does not have telemechanical apparatus, then the utility model mails to the dispatching center to the electricity data separately.The utility model can be widely used in Operation of Electric Systems scenes such as generating plant, transformer station.

The utility model compared with prior art has following distinguishing feature: (1) precision height.The numerical value of the numerical value of gathering and metrological service's statistics is in full accord.This is owing to adopted photoelectricity coupled circuit and pulsewidth discriminator circuit pulse electricity meter and this device can be kept apart and sub-standard pulse elimination from power supply in the Acquisition Circuit.(2) the electric measure of guarantor is arranged, data are not lost.This is that the storer to processor under the dead electricity situation continues to provide power supply because adopted guarantor's circuit, thereby the data of storer are not lost.(3) be not subjected to the influence of the method for operation.This is because processor receives the relevant data that fortune side changes, and electricity is taked corresponding processing mode.(4) correctly gather the outlet electricity at times.This is because processor can be accepted the timesharing period that the operator on duty is provided with, and running well at the clock of dead electricity situation lower device can not cause the clock confusion.(5) can recollect data.This be because processor receive the operator on duty by a keyboard entry recollect order after, just can recollect data.

Accompanying drawing 1 is that electricity is gathered the retransmission unit structure principle chart.

Accompanying drawing 2 is one-chip computer and interface circuit synoptic diagram thereof.

Accompanying drawing 3 is Acquisition Circuit synoptic diagram.

Accompanying drawing 4 is clock circuit synoptic diagram.

Accompanying drawing 5 is to protect electric circuit diagram.

Accompanying drawing 6 is serial communication port circuit diagrams.

Now in conjunction with the accompanying drawings the utility model is further described.

The utility model comprises processor (1), Acquisition Circuit (2), clock circuit (3), protects circuit (4) and serial communication port (5).Fig. 1 is a structure principle chart of the present utility model, and the information transmission that Acquisition Circuit (2) is gathered is given processor (1), protects the storer that circuit (4) ensures in clock circuit (3) and the processor (1) and power under the dead electricity situation.Processor (1) is connected with serial communication port is two-way with clock circuit (3) respectively.

Fig. 2 is one-chip computer and interface circuit synoptic diagram thereof, and pulse electricity meter is connected with Acquisition Circuit (2), and the electric degree pulse that pulse electricity meter is sent is delivered in the single-chip microcomputer and counted through Acquisition Circuit (2).Single-chip microcomputer regularly reads the time of the time of clock circuit (3) as this device, and single-chip microcomputer can be provided with the clock truth of a matter of clock circuit (3).Single-chip microcomputer is come in the message pick-up of telemechanical apparatus by serial communication port (5), the electricity stacked data is added again, and mails to the dispatching center.

Fig. 3 is the Acquisition Circuit synoptic diagram, and the photoelectricity coupled circuit of being made up of phase inverter, resistance R 1, R2 and photoelectricity coupling chip TLP521-2 is at first delivered in the electric degree pulse, after the photoelectricity coupling, delivers to 74LS393 and tristate gate control end.Adopt the photoelectricity coupled circuit, can prevent influencing each other between circuit, pulse is after the photoelectricity coupling, and amplitude becomes 5V, and width is constant.The high level of electric degree pulse is opened triple gate, and count pulse is counted by 74LS393 through triple gate, and the rising edge control chip 74LS393 of pulse begins counting, and the negative edge of pulse is removed the count value of 74LS393.The pulse that only reaches the width of adjusting could guarantee that certain grade of counter overflows, and sends look-at-me, and the request single-chip microcomputer is handled.If the width deficiency of electric degree pulse, the electric degree pulse self is closed triple gate, and removes the count value of 74LS393.The undesirable disturbing pulse of width will be counted by elimination like this, and qualified pulse can not be repeated counting.Single-chip microcomputer adopts the full mode received pulse signal that interrupts, thereby has avoided pulse missing.

Fig. 4 is the clock circuit synoptic diagram, and clock chip 58167 and 32768HZ crystal oscillator and resistance R 3, capacitor C 1, C2 form clock circuit.The effect of clock circuit is that single-chip microcomputer reads the time of interior time of clock circuit as device, and single-chip microcomputer can be provided with the clock truth of a matter in the clock circuit.

Fig. 5 protects electric circuit diagram, and during operate as normal, system power supply, is charged to battery 3/GP60K to storer 6264, clock chip 58167 power supplies by resistance R 4, IN4148 diode D1 simultaneously.When powering on, system power supply is to capacitor C 3 chargings, CE2 end through regular hour storer 6264 becomes high level, since the power supply of chip 74LS00 by system power supply to capacitor C 4 charging gained, this has just guaranteed that storer 6264 is in when powering on and has write illegal state that data can be by washout in the storer.

When power down, the power supply vanishing of chip 74LS00, the WE end of storer 6264 becomes high level, forbids memory write 6264.Simultaneously, capacitor C 3 makes 6264 CE2 end become low level by 10 discharges of diode D3 and resistance R.Therefore after power down moment and power down, storer 6264 is in writes illegal state, and data can not lost in the storer.

During operate as normal, system power supply makes the PWR DOWN end of clock chip 58167 be high level by resistance R 7, R8, and single-chip microcomputer can read the data in the clock chip 58167.When power down, 58167 PWR DOWN end is low level, and chip is by battery 3/GP60K power supply, and chip continues operate as normal but the extraneous swap data of getting along well.Behind power up, single-chip microcomputer can read data in the clock chip 58167 equally as time of this device.

Fig. 6 is the serial communication port circuit diagram.8251, MC1488N and MC1489N form serial communication port.When the information of reception, single-chip microcomputer is come in the message pick-up of telemechanical apparatus by MC1489N and 8251; When sending information, single-chip microcomputer by 8251 and MC1488N information is mail to the dispatching center.

In the EPROM chip of software solidification of the present utility model in device, when design hardware, utilize each functional template of STD industrial bus standard design.The CPU of single-chip microcomputer, RAM, EPROM, crystal oscillator and protect circuit (4), clock circuit (3), serial communication port (5) and be placed on and be motherboard on the template, keyboard and display circuit are placed on the template, and photoelectricity coupled circuit and pulse width discriminating circuit are placed on the template as collection plate.The utility model can be handled the electric degree pulse that 4 collection plates are gathered at most, promptly can accept 32 tunnel Pulse Electric tolerance at most.

Claims (1)

1, the on-the-spot electric power electricity of a kind of Operation of Electric Systems is gathered retransmission unit, it includes and is used for processor (1) that information is handled, the Acquisition Circuit (2) that is used for Information Monitoring, be used for the electricity data are mail to the serial communication port (5) of dispatching center, it is characterized in that it also includes the clock circuit (3) that is used for having of one's own the clock system and is used for ensuring to clock circuit (3) and guarantor's electricity circuit (4) of processor (1) storer power supply under the dead electricity situation, the information transmission that Acquisition Circuit (2) is gathered is given processor (1), protecting a road of circuit (4) is connected with clock circuit (3), another road of protecting circuit (4) is connected 3 with processor (1), and processor (1) is connected with serial communication port is two-way with clock circuit (3) respectively.

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