JPH02309525A - Monitoring device of transformation equipment for electric power - Google Patents

Abstract

PURPOSE:To allow accurate detection all times with erroneous operation of an instruction detecting means prevented by providing a supply voltage detection portion for the preset instruction detecting means to output a reset signal or a gate signal during the make of a power supply or the fluctuation of the power supply. CONSTITUTION:A monitoring device of transformation equipment for electric power, with a location detecting means 2a, an instruction detecting means 2b, a time measuring means 3, a data processing means 4, a data storing means 6 and a data displaying means 5, is basically constituted by an input portion 7 to input signals from an open- close equipment 1 to the instruction detecting means 2b, an instruction detection portion 8 to generate instruction detection signals in accordance with input signals, an output portion 9 to output the instruction detection signals and in addition a supply voltage detection portion 10 to detect supply voltage for sending a reset signal to the instruction detection portion 8 or a gate signal to the output portion 9 from the supply voltage detection portion 10 during the make of a power supply or the fluctuation of the supply voltage. In such constitution, the detection portion 8 can be reset or the output portion 9 can be locked and so the erroneous operation of the means 2b is prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a monitoring device for power substation equipment, and in particular to a command detection means for detecting an operation command for switching equipment. related to improvements.

(Prior Art) Conventionally, in electric power substation equipment, the position of a switching device and the operation command of the switching device are detected by a position detecting means and a command detecting means, and the signals sent from these two detecting means are sent to a time measuring means. A monitoring device is provided which measures the opening/closing time of the opening/closing equipment by inputting the data, processes the measurement results by the data processing means, and stores and displays the processed data by the data storage means and the data display means. There is.

In order to prevent the command detection means from malfunctioning due to voltage fluctuations when the power is turned on, the command detection means of such a monitoring device for electric power substation equipment includes, in addition to a command detection section that detects operation commands, A reset signal output section is provided that outputs a reset signal to the command detection section when the power is turned on. This reset signal output section is usually composed of a resistor, a capacitor, etc., and when the power is turned on, there is a time delay until a constant voltage is reached, and the reset signal is output.

(Problems to be Solved by the Invention) However, the conventional power substation equipment monitoring device as described above has the following drawbacks.

In other words, although the command detection means having the reset signal output section described above can cope with voltage fluctuations when the power is turned on, it cannot cope with fast-changing voltage fluctuations such as instantaneous interruptions in the external power supply, and may cause errors. In some cases, a command detection signal may be output due to an error, and this has been an obstacle to accurate monitoring operations.

Additionally, if the reset is not performed when the power is restored after a momentary power interruption, measurements will be taken in that transient state when the power is turned on again, making it impossible to perform accurate monitoring operations. There were also drawbacks.

The present invention was proposed in order to solve the problems of the prior art as described above, and its purpose is to prevent malfunction of the command detection means during power fluctuations such as when the power is turned on and when the power is momentarily cut off. By doing so, it is an object of the present invention to provide a highly accurate monitoring device for power substation equipment that can always perform accurate measurements.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides monitoring of power substation equipment having a position detection means, a command detection means, a time measurement means, a data processing means, a data storage means, and a data display means. In addition to the basic configuration of the device, the command detection means includes an input section that manually inputs signals from the switching equipment, a command detection section that generates a command detection signal based on the input signal, and an output section that outputs the command detection signal. A power supply voltage detection section is provided to detect the power supply voltage, and when the power is turned on or the power supply fluctuates, the power supply voltage detection section sends a reset signal to the command detection section or a gate signal to the output section.

The present invention is characterized in that the command detection section is reset for an arbitrary period of time using a reset signal, or that the output section is locked for an arbitrary period of time using a gate signal.

(Function) In the monitoring device for electric horn substation equipment of the present invention, when the power is turned on or when the power changes, the command detecting section of the command detecting means is reset for an arbitrary time, or the output section of the command detecting means is set at an arbitrary time. Time can be locked. Therefore, malfunction of the command detection means can be reliably prevented, and accurate measurement can always be performed from the initial state.

(Example) Hereinafter, an example of a monitoring device for power substation equipment according to the present invention will be specifically described with reference to the drawings.

■First embodiment...Figure 1, Figure 2, Figure 4, Figure 5, Figure 6 First,
The basic configuration of the monitoring device of the first embodiment is as shown in FIG. That is, the opening/closing device 1 is connected with a position detecting means 2a for detecting the position of the opening/closing device and a command detecting means 2b for detecting an operation command signal of the opening/closing device 1, and both of these detecting means 2a and 2b are time measuring means. Connected to 3. The results measured by the time measuring means 3 are outputted to the data display means 5 or the data storage means 6 via the data processing means 4.

Next, the basic configuration of the command detection means 2b used in the first embodiment is shown in FIG. That is, the command detection means 2b is
An input insulating means (input section) 7 that inputs a signal from the switching device 1, a waveform shaping means (command detection section) 8 that shapes a waveform based on the input signal and uses it as a command detection signal,
It includes an output insulating means (output section) 9 that outputs a shaped waveform, and a power supply voltage detection means (power supply voltage detection section) 10 that detects the power supply voltage. When the power is turned on or when the power fluctuates, the waveform shaping means 8 is output from the power supply voltage detecting means 10.
A reset signal 11a is sent to the waveform shaping means 8, and the waveform shaping means 8 is configured to be reset at an arbitrary time.

Next, FIG. 4 shows an example of a specific circuit configuration of the command detection means 2b based on the basic configuration shown in FIG. 2. That is, the output signal of the O/E converter 7a, which is the input insulation means 7, drives the photocoupler 9a, which is the output insulation means 9, via the waveform shaping IC 8a, which is the waveform shaping means 8. In addition, when the power is turned on or when the power changes, the power supply voltage detection IC, which is the power supply voltage detection means 10,
A reset signal 11a is input from l0a to the waveform shaping IC 8a.

FIG. 5 is a diagram showing waveforms when the power is turned on in the command detection means of FIG. 4. In this FIG. 5, the curve X is
This is a curve showing the power supply voltage, and the curve Y is the reset signal 1.
It is a curve showing 1a. In other words, the power is turned on at point a.
Then, as shown by curve X, the voltage increases to steady voltage V while maintaining a constant slope. Then, at point 0, which is near the midpoint of the voltage rise, the waveform shaping IC 8a becomes operational, and at point d in the latter half of the voltage rise, when the voltage has risen almost to the steady voltage V, the waveform shaping IC 8a is activated to prevent the voltage rise due to the voltage increase. become unaffected.

Therefore, if the waveform shaping IC 8a is not reset during the period when the waveform shaping IC 8a is affected by the voltage increase due to the voltage increase, that is, during the time period T from the 0 point to the d point, the waveform shaping IC 8a will be affected by the power supply voltage. The rise in the temperature is detected as an operation command. On the other hand, in this embodiment, as shown by the curve Y, the power supply voltage detection ICl0a starts operating at point b at the beginning of the voltage rise due to turning on, and the reset signal 11a goes low.
The level changes from the H level to the H level, and at point d, the power supply voltage detection IC 10a stops operating, and the reset signal 11a changes from the H level to the L level. That is, in this embodiment, the reset signal 11a is continuously sent to the waveform shaping IC 8a from point b to point d. Therefore, in this embodiment, the waveform shaping IC 8a is affected by the voltage increase caused by turning on the voltage T
, since the waveform shaping IC 8a can be reliably reset continuously, there is no risk that the waveform shaping IC 8a will malfunction due to the influence of the voltage increase due to the turning on.

FIG. 6 is a diagram showing waveforms in the command detecting means of FIG. 4 at the time of instantaneous power interruption. In this FIG. 6, the curve X and the curve Y represent the power supply voltage and the reset signal 1, as in FIG.
It is a curve showing 1a. That is, when the power is momentarily cut off at point a, the voltage begins to drop from the steady voltage V. Then, at the point when passing point b immediately after the start of the descent, the waveform shaping I
C8a began to be affected by voltage fluctuations due to instantaneous interruptions, and after the voltage finished falling and started rising again toward the steady voltage V, the voltage rose almost to the steady voltage V.
At this point, the waveform shaping IC 8a is no longer affected by voltage fluctuations due to instantaneous interruptions. Therefore, if the waveform shaping IC 8a is not reset while the waveform shaping IC 8a is affected by voltage fluctuations due to instantaneous interruptions, that is, during the time T2 from point b to point 0, the waveform shaping IC 8a will Fluctuations are detected as operation commands. On the other hand, in this embodiment, as shown in the curve Y, the power supply voltage is detected at point b.
C10a starts operating, the reset signal 11a changes from L level to H level, and at the 0 point, the power supply voltage detection IC 10a stops operating, and the reset signal 11a'7J
<Changes from H level to L level. That is, in this embodiment, the reset signal 11a is continuously sent to the waveform shaping IC 8a from point b to point 0. Therefore, in this embodiment, since the waveform shaping IC 8a can be reliably reset during the time T2 from point b to point 0, where the waveform shaping IC 8a is affected by voltage fluctuations due to instantaneous interruption, the waveform shaping IC 8a can be reliably reset. There is no risk that the IC 8a will malfunction due to voltage fluctuations caused by instantaneous interruptions.

As described above, in this embodiment, the waveform shaping IC 8a in the command detection means 2b can be reliably reset when the power is turned on or when there is a power fluctuation such as a momentary power interruption, so the influence of the power fluctuation can be avoided. This makes it possible to always perform highly accurate measurements without being affected.

■Second embodiment: Figures 1, 3, 7, and 8 First, the basic configuration of the monitoring device of this embodiment is as shown in Figure 1, as in the first embodiment. Therefore, the explanation will be omitted.

Next, the basic configuration of the command detection means 2b of this embodiment is as follows.
It is shown in Figure 3. That is, the command detection means 2b detects the switching device 1
A human power isolation means (input section) 7 that inputs a signal from the input signal, a waveform shaping section (command detection section) 8 that shapes a waveform based on the input signal and uses it as a command detection signal, and outputs the shaped waveform. The output insulating means (output section) 9 detects the power supply voltage, and the power supply voltage detection means (power supply voltage detection section) 10 detects the power supply voltage. Then, when the power is turned on or when the power fluctuates,
The gate signal 11b is sent from the power supply voltage detecting means 10 to the output insulating means 9, and the output of the output insulating means 9 is locked for an arbitrary period of time.

Next, FIG. 7 shows an example of a specific circuit configuration of the command detection means 2b based on the basic configuration shown in FIG. 3. That is, the output signal of the O/E converter 7b, which is the human power isolation means 7, is inputted to one side of the AND element 12 via the waveform shaping IC 8b, which is the waveform shaping means 8. Further, when the power is turned on or when the power changes, the output signal 11c of the power supply voltage detection IC 10a, which is the power supply voltage detection means 10, passes through the inverter element 13 and passes through the gate signal 11.
b is output, and this gate signal 11b is manually applied to one side of the AND element 12.

The AND element 12 drives the photocoupler 9a, which is the output insulating means 9, only when the AND conditions are met.

FIG. 8 is a diagram showing waveforms in the command detection means of FIG. 7 when the power is turned on. In this FIG. 8, the curve W is the power supply voltage, and the curve X is the power supply voltage detection ■Cl0a output signal 1
1c, the curve Y shows the gate signal 11b output from the inverter element 13, and the curve Z shows the output signal of the waveform shaping IC 8a, respectively. That is, at point a, the power supply is O.
When the voltage reaches N, as shown by the curve W, the voltage increases to the steady voltage V while maintaining a constant slope. At point b at the beginning of this rise, as shown in curve X, the power supply voltage detection IC
10b starts operating, and the output j signal 11C of the power supply voltage detection IC 10b changes from L level to H level. The output signal 11c of this power supply voltage detection IC 10b passes through the inverter element 13 and outputs a gate signal 11b. The curve Y showing the change in the gate signal 11b is the H level of the curve X,
Although it is an inversion of the L level, since the inverter element 13 is not yet in an operable state at point b at the beginning of the voltage rise, it becomes operable for the first time near point C, which is the midpoint of the voltage rise. Note that the gate signal 11b output from the inverter element 13 is inputted to one side of the AND element 12. Furthermore, at point e where the voltage has risen to approximately the steady voltage V, the power supply voltage detection IC 10b stops operating, and the output signal 11C of the power supply voltage detection IC 10b changes from the H level to the L level, so that the inverter element 13 The gate signal 1 lb output from the gate signal changes from L level to H level.

On the other hand, the waveform shaping IC8b generates an erroneous signal as shown in the curve Z during time T3 from point 0 to point d, which is the midpoint between point 0 and point e, due to transient voltage fluctuations when the power is turned on. It may be output. In this case, assuming that the photocoupler 9b is driven only by the output signal,
The photocoupler 9b is driven and an erroneous signal is output to the outside.

On the other hand, in this embodiment, in addition to the output signal of the waveform shaping IC 8b, a gate signal 11b based on the output signal 11c of the power supply voltage detection IC 0b is inputted to the AND element 12, and when the AND condition is satisfied, that is, Curve Y and curve Z
Only when the AND condition with
The time T from point C to point d is
Regarding No. 3, since the AND condition is clearly not correct, the photocoupler 9b is not driven, and therefore there is no possibility that an erroneous signal will be outputted to the outside. Further, although not shown, the output of an erroneous signal from the photocoupler 9b can be similarly locked even when the power supply fluctuates such as a momentary power interruption. In this way, in this embodiment, it is possible to reliably lock the erroneous signal generated by the waveform shaping IC 8b in the power supply command detection means 2b, so that accurate measurement can always be performed.

[Effects of the Invention] As explained above, in the present invention, a power supply voltage detection section is provided in the command detection means having an input section, a command detection section, and an output section, and the power supply voltage is detected when the power is turned on or when the power supply fluctuates. To reliably prevent malfunction of a command detecting means when power is turned on or when power fluctuates by simply improving the configuration by sending a reset signal from the detecting part to the command detecting part or sending a gate signal to the output part. Because it is possible to
It is possible to provide a highly accurate monitoring device for power substation equipment that can always perform accurate measurements.

[Brief explanation of drawings]

FIG. 1 shows a first example of a monitoring device for power substation equipment according to the present invention.
FIG. 2 is a circuit block diagram showing the basic configuration of the command detection means used in the first embodiment. FIG. 3 is a circuit block diagram showing the basic configuration of the command detection means used in the first embodiment. FIG. 4 is a circuit block diagram showing the basic configuration of the command detection means used in the first embodiment. FIG. 5 is a circuit diagram showing the specific circuit configuration of the command detection means used in the first embodiment. A waveform diagram showing the waveform when the power is turned on in the detection means,
FIG. 6 is a waveform diagram showing the waveform at the time of momentary power interruption in the command detection means of the first embodiment, FIG. 7 is a circuit diagram showing the specific circuit configuration of the command detection means used in the second embodiment, and FIG. FIG. 8 is a waveform diagram showing waveforms when the power is turned on in the command detection means of the second embodiment. 1... Opening/closing device, 2a... Position detection means, 2b...
- Command detection means, 3... Time measurement means, 4... Data processing means, 5... Data display means, 6... Data storage means. 7... Input isolation means, 7a, 7b... 0/E converter, 8... Waveform shaping means, 8a, 8b... Waveform shaping ■
c, 9... Output insulation means, 9a, 9b... Photo coupler, 10... Power supply voltage detection means, 10a, 10b.
...Power supply voltage detection IC111a...Reset signal, l
lb...Gate signal, 12...AND element, 13...
...Inverter element.

Claims (2)

[Claims] (1) A position detection means for detecting the position of the switching equipment, a command detection means for detecting the operation command of the switching equipment, and a time measuring means for measuring the opening/closing time of the switching equipment based on the signals sent from these two detection means. and a data processing means for processing the results of the time measurement means, a data storage means for storing the processed data, and a data display means for displaying the results of the data processing means. In the device, the command detection means includes an input section that inputs a signal from a switching device, a command detection section that generates a command detection signal based on the input signal, an output section that outputs a command detection signal, and a power supply voltage. The power supply voltage detection section is configured to send a reset signal from the power supply voltage detection section to the command detection section when the power is turned on or when the power supply fluctuates, thereby resetting the command detection section for an arbitrary period of time. A monitoring device for power substation equipment. (2) a position detection means for detecting the position of the switching equipment, a command detection means for detecting the operation command of the switching equipment, and a time measuring means for measuring the opening/closing time of the switching equipment based on the signals sent from these two detection means; and a data processing means for processing the results of the time measurement means, a data storage means for storing the processed data, and a data display means for displaying the results of the data processing means. In the device, the command detection means includes an input section that inputs a signal from a switching device, a command detection section that generates a command detection signal based on the input signal, an output section that outputs a command detection signal, and a power supply voltage. The power supply voltage detection section is configured to send a gate signal from the power supply voltage detection section to the output section when the power is turned on or when the power changes, and lock the output of the output section for an arbitrary period of time. A monitoring device for power substation equipment.