JP2010014543A - System for collecting and selecting oscilloscope data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for collecting and selecting oscilloscope data, which has a flexible constitution capable of making the number of signal input channels respond to the scale of a system and produces little effect on the whole of the system on the occasion of a malfunction. <P>SOLUTION: The system for collecting and selecting oscilloscope data has a plurality of oscilloscope units and an oscilloscope server which collects oscilloscope data outputted from these oscilloscope units, through a network. Each oscilloscope unit is connected to the other by an inter-unit starting interface, and when a contact input signal is produced in some unit, all of the units output the oscilloscope data all together. The oscilloscope server extracts relevant data from the oscilloscope data it receives, and outputs them, based on a grouping table set beforehand. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an oscillodata device that records current and voltage of a power system (hereinafter abbreviated as “system”) and outputs current and voltage information when a relay such as an accident is operated, in particular, analog voltage and current sampling of the system. The present invention relates to an oscilloscope data collection / selection device including an oscilloscope device that generates oscilloscope data including data and an oscilloscope server that collects the oscilloscope data via a network and selects necessary data.

  The oscilloscope device inputs a system voltage signal and current signal to a signal input channel, samples them, and stores them in a memory sequentially. The oscilloscope further includes a contact input channel, and a contact input signal such as a relay provided at an appropriate location of the system is input to this port. Normally, there are multiple signal input channels and contact input channels, and when the contact input signal input to one of the contact input channels is on (relay contact is on), that signal is stored as a trigger signal. The oscilloscope data including the sampling data stored in a predetermined period (a predetermined period before and after the trigger signal) is generated and output.

  The oscillo server can collect this oscilloscope data and perform waveform analysis when an accident or the like occurs in the system.

  FIG. 1 is a block diagram of a conventional oscilloscope data collection / selection apparatus.

  The oscilloscope data collection / selection device includes an oscilloscope device 1 and an oscilloscope server 2, which are connected by a network line 3.

  The oscilloscope 1 includes a signal input terminal for receiving voltage signals and current signals for a plurality of signal input channels AC1 to ACn, and a contact input terminal for receiving contact input signals for a plurality of contact input channels DI1 to DIm. Voltage input signals and current signals detected by sensors in the system are input to the signal input channels AC1 to ACn, respectively, and contact input signals such as relay trips provided in the system are input to the contact input channels DI1 to DIm. Enter.

  The oscilloscope includes a grouping table 4 as shown in FIG. This grouping table 4 is used to group signal inputs (channels) and contact inputs (channels) into groups 1 to k (k = 20 in this figure) for each related input element. Each group collects the input elements necessary for waveform analysis at the time of an accident, etc.When there is a contact input signal in any contact input channel, that signal is triggered and input to the signal input channel of that group. The output signal (sampling data) is set as oscilloscope data and output to the oscilloscope server 2.

  In this way, by providing the grouping table 4 in the oscilloscope device 1, only the oscilloscope data necessary for the analysis can be selected and output to the oscilloscope server 2 for each trigger factor.

  Further, as shown in FIG. 3, there is also an oscilloscope data collection and selection device that uses a plurality of oscilloscope units 10 to 12 having a small number of input channels and divides all voltage / current signals and contact input signals of the system into each oscilloscope unit. Proposed. In this device, a grouping table is provided for each oscilloscope unit.

Furthermore, a device has been proposed in which a plurality of oscillo units are connected to one oscillo server, and oscillo data from each oscillo device is collected in the oscillo server to perform waveform analysis between the oscillo units (Patent Document 1). In this device, each oscilloscope unit is connected by an inter-unit activation interface terminal, and when a trigger signal is generated in any oscilloscope unit, the trigger signal is transmitted to other oscilloscope units. Accordingly, by receiving oscilloscope data from all oscilloscope units, it is possible to analyze waveforms between oscilloscope units.
2007-285857

  However, the device shown in FIG. 1 has the following problem because the relationship between the oscilloscope device 1 and the oscilloscope server 2 is 1: 1.

  That is, when the oscilloscope device 1 having a large number of signal input channels is used in a small system, the number of channels is excessive, which increases the cost. In addition, when the oscilloscope device 1 having a large number of signal input channels is used in a large system, even if an event such as a fault occurs in the system and a trigger signal occurs when the oscilloscope device is stopped, Since all channels are disabled, the influence on the entire system is increased.

  In the apparatus shown in FIG. 3, it is not necessary to stop all the oscilloscope units when a failure occurs. However, since all the voltage / current signals and contact input signals of the system are divided into each oscilloscope unit, FIG. Compared with the device shown in Fig. 4, there is a limitation in grouping. For example, the oscilloscope unit 10 cannot be triggered by a contact input signal to the oscilloscope unit 11.

  Furthermore, since the apparatus shown in Patent Document 1 does not include a grouping table in the oscilloscope data collection / selection apparatus, it is not possible to extract only oscilloscope data necessary for analysis for each accident.

  Therefore, an object of the present invention is to provide an oscilloscope data collection / selection device that has a flexible configuration in which the number of signal input channels can be adjusted according to the scale of the system, and can have a small influence on the entire system in the event of a failure. There is to do.

  The oscilloscope data collection / selection device of the present invention comprises a plurality of oscilloscope units and an oscilloserver.

  The oscillo-unit includes a signal input terminal that receives a current signal or a voltage signal for at least one signal input channel, a contact input terminal that receives a contact input signal for at least one contact input channel, and an inter-unit activation interface A terminal and a memory for storing sampling data of a current signal or a voltage signal input to the signal input channel are provided, and oscilloscope data including the sampling data stored in the memory is output based on a trigger signal.

  The oscillo server includes an oscillo data extraction unit that extracts specific oscilloscope data from the oscilloscope data based on a preset grouping table.

  The inter-unit activation interface terminals of each of the plurality of oscilloscope units are connected to each other. When a contact input signal is received through a contact input channel, the trigger signal is generated and output to all oscilloscope units.

Each group of the oscilloserver grouping table stores the signal input channel and the contact input channel together with the unit number of the oscilloscope unit,
When there is an input in any contact input channel of each group, the oscillo data extraction unit of the oscillo server extracts oscilloscope data including sampling data from the signal input channel of the group as the specific oscilloscope data.

  Whether the plurality of oscilloscope units are based on the oscilloscope unit number at the time of trigger signal generation and the contact input signal input to the contact input channel or received by the inter-unit activation interface terminal Oscilloscope data including trigger factor data for identifying whether or not, sampling data for a predetermined period, and a contact input signal is output.

  In the oscilloscope data collection / selection device of the present invention, a plurality of oscilloscope units are connected by an inter-unit activation interface, and when a contact input signal is received by any oscilloscope unit, a trigger signal is transmitted to all units. At this time, the oscilloscope data is output from all oscilloscope units to the oscilloscope server. The oscillo server extracts specific oscilloscope data from the received oscilloscope data based on the grouping table.

  The grouping table of the oscilloserver is similar to the table shown in FIG. 2, but the unit number of the oscilloscope unit is added to each cell. By doing so, it is possible to specify a group of contact input channels that are trigger factors and to specify a signal input channel included in the group.

  According to the present invention, it is possible to set an optimal number of oscilloscope units according to the scale of the system, and it is possible to prevent an increase in the cost of the system as a whole and to reduce the influence on the entire system in the event of a failure. be able to.

  FIG. 4 is a schematic configuration diagram of an oscilloscope data collection / selection apparatus according to an embodiment of the present invention.

  In the figure, each of the plurality of oscilloscope units 10-13... N is installed at an appropriate location of the system. The oscilloscope data output from the oscilloscope units 10 to 13... N is input to the oscilloscope server 20 via the network 3.

  Each oscilloscope unit has an input signal receiving terminal for receiving a current signal or a voltage signal for at least one signal input channel ACn, and a contact signal receiving terminal for receiving a contact input signal for at least one contact input channel DIm; One inter-unit activation interface terminal TP is provided on the input side. In this embodiment, an analog input terminal is employed as an input signal receiving terminal. However, as will be described later (FIG. 9), when the input signal is a digital signal, a digital input terminal is employed, and direct sampling data is used. Is entered. In the latter case, a current signal or voltage signal (sampling data) for the signal input channel ACn is serially input to the digital input terminal.

  Each signal input channel ACn and contact input channel DIm are different for each unit, and channels that are mutually related in the system are collected for each unit.

  FIG. 5 shows an example of the power system. For example, in FIG. 5, current signals and voltage signals from CT and PT related to the bus line 30 are input to the signal input channel ACn of the oscilloscope unit 10 of FIG. The current signal and voltage signal are input to the signal input channel ACn of the oscilloscope unit 11, and the current signal and voltage signal from the CT and PT related to the # 1 line 32 are input to the signal input channel ACn of the oscilloscope unit 12, Current signals and voltage signals from CT and PT related to the # 2 line 33 are input to the signal input channel ACn of the oscilloscope unit 13.

  In addition, to which oscilloscope unit the contact input signal (relay trip signal) of the bus protection relay and the contact input signal of the B bus protection relay are input so that the oscilloscope 20 can easily analyze the oscilloscope data. Is decided. Mainly, a contact input signal of a protection relay related to the oscilloscope unit is connected to the oscilloscope unit inputted to the signal input channel ACn. For example, if the oscilloscope unit 10 is related to the bus line 30, the contact point of the bus line protection relay is connected to the contact input channel of the oscilloscope unit 10. Further, if the oscilloscope unit 11 is related to the maiden bus line 31, the contact point of the maiden bus line protection relay is connected to the contact input channel of the oscilloscope unit 11. The same applies to the contact input signals of the # 1 line 32 and the # 2 line 33.

  Thus, for example, when the contact input channel of the oscilloscope unit 10 is a trigger factor, the signal input channel ACn of the oscilloscope unit 10 itself is selected. However, not all of the necessary voltage / current signal data is prepared, but voltage / current signal data input to another oscilloscope unit (for example, oscilloscope unit 11) may be necessary.

  FIG. 6 is a configuration diagram of the oscilloscope unit 10. Since the other oscilloscope units 11 to N have the same configuration as the oscilloscope unit 10, the oscilloscope unit 10 will be described below.

  An A / D converter 100 is connected to an input signal receiving terminal T (ACn) that receives a voltage signal or a current signal, and is sampled into digital data having a predetermined resolution. The sampling data is obtained from a parallel-serial conversion circuit. Via a microprocessor (MPU) 101 (not shown).

  When receiving the contact input signal, the contact signal receiving terminal T (DIm) that receives the contact input signal generates a trigger signal and outputs it to the MPU 101.

  The inter-unit activation interface TP is connected to the MPU 101, and the MPU 101 detects a trigger signal sent from another unit.

  The memory 102 stores sampling data of the voltage / current signal for a certain time for each signal input channel.

  The network interface 103 outputs the oscilloscope data from the MPU 101 to the network 3.

  In the oscilloscope unit 10 having the above configuration, the MPU 101 always stores a voltage / current signal in the memory 102 for each signal input channel, and generates a trigger signal upon detecting a contact input signal to generate an inter-unit activation interface TP. Output to other units via Further, oscilloscope data including sampling data for each signal input channel stored in the memory 102 is created by the trigger signal or by a trigger signal from another unit received by the inter-unit activation interface TP, and this is generated in the network 3. Is output to the oscilloscope server 20.

  When the other oscilloscope units 11 to N receive the trigger signal from the oscilloscope unit 10, they perform the same operation as the oscilloscope unit 10. That is, the oscilloscope data including the sampling data stored in the memory 102 is created and output to the oscilloscope server 20 via the network 3.

  FIG. 7 shows the structure of the oscilloscope data.

  The unit number A1 is a unit number for identifying the oscilloscope unit and is indicated by the following numerical value.

XXXn
However,
XXX Unit Number The trigger time A2 is the time when the trigger signal is generated or received.

  The trigger factor type A3 is a code for identifying whether or not the trigger factor is a contact input signal, and is indicated by the following numerical value.

0-6 Contact input signal or manually (contact input signal is “0”, for example)
7 Sampling data, contact information, etc. A4 by receiving the inter-unit activation interface TP are sampling data (for each signal input channel) for a predetermined time before and after the trigger and the state of each contact input signal at the time of the trigger.

  For example, when a trigger signal is generated by any contact input signal input to the oscilloscope unit 10, oscilloscope data having the same trigger time A <b> 2 is generated in all units, and these oscilloscope data are transmitted to the oscilloscope server 20. Sent all at once. Further, the trigger factor A3 of the oscilloscope unit 10 is a numerical value selected from 0 to 6 indicating the contact input signal, and the trigger factors of the other oscilloscope units 11 to N are “7”.

  The oscillo server 20 includes an input setting unit 200, an oscillo data extraction unit 201, and an oscillo data output unit 202.

  The oscilloscope data extraction unit 201 includes a grouping table 201a. The input setting unit 200 is a part that arbitrarily sets the contents of the grouping table 201a, and includes a keyboard or the like.

  FIG. 8 shows the grouping table 201a.

  In this example, the grouping table 201a is divided into groups 1 to 20, and each group groups signal input channels and contact input channels as in FIG. The table 201a is different from the table 4 shown in FIG. 2 in that the unit number XXXn is stored in each cell of the table in addition to the signal input channel and the contact input channel. This unit number XXXn represents the position (oscilloscope unit number) of the input channel ACn or the contact input channel DIm stored in the cell.

  Since the grouping table 201a is configured in this way, even when oscilloscope data is transmitted from all the units when a trigger is activated in any oscilloscope unit, the contact input signal that caused the trigger from among them is transmitted. Only the oscilloscope data related to (specific oscilloscope data) can be extracted and output to the oscilloscope data output unit 202.

  For example, when a contact input signal is input to the contact input channel DI6 of the oscilloscope unit 11 (unit number XXX2), the grouping table 201a in FIG. 8 selects the signal input channels AC3, AC5,. Here, the signal input channel AC3 is an input channel of the oscilloscope unit 11 (unit number XXX2), the signal input channel AC5 is an input channel of the oscilloscope unit 10 (unit number XXX1), and the signal input channel AC10 is the oscilloscope unit 12 ( This is an input channel of unit number XXX3). Thus, when a trigger is applied to one oscilloscope unit, oscilloscope data from a plurality of oscilloscope units can be extracted. Of course, when the signal input channel and the contact input channel of the oscilloscope unit 10 all belong to the group 1 as in the group 1, the contact input signal is input to any one of the contact input channels of the group 1. Only oscilloscope data from all signal input channels of group 1 can be extracted.

  As described above, when any oscilloscope unit is triggered, oscilloscope data is transmitted from all units to the oscilloscope server at the same time. The oscilloserver extracts the oscilloscope data related to the contact input signal as specific oscilloscope data from the transmitted oscilloscope data with reference to the grouping table 201a.

  Therefore, it is only necessary to install as many oscillounits with a small number of signal input channels and contact input channels as necessary according to the scale of the system. Further, since it is not necessary to provide a grouping table for each unit, the cost of each unit and the entire oscilloscope data collection / selection device can be reduced.

  In addition, if any oscilloscope unit fails during operation, the operation of other oscilloscope units can be continued by removing only that unit from the system. For this reason, even when a failure occurs, the influence on the whole is minimized.

  In the above embodiment, as shown in FIG. 6, the input signal receiving terminal T (ACn) for receiving the voltage / current signal and the A / D converter 100 are provided in the oscilloscope unit 10. As shown, the input signal receiving terminal T (ACn), the A / D converter 100, and the P / S converter 104 for parallel-serial conversion of the output of the A / D converter 100 are incorporated. It is also possible to provide the circuit 40 at a location different from the oscilloscope unit 10. In this case, the output of the signal input circuit 40 is a digital signal (current signal or voltage signal sampling data corresponding to the signal input channel ACn), and the digital input terminal (input signal receiving terminal) TD has an output as shown in FIG. The sampling data is serially input in the order of signal input channels.

It is a block diagram of the conventional oscilloscope data collection selection apparatus. It is a block diagram of the conventional grouping table. It is a block diagram of the other conventional oscilloscope data collection selection apparatus. It is a schematic block diagram of the oscilloscope data collection selection apparatus which is embodiment of this invention. An example of a power system is shown. 1 is a configuration diagram of an oscilloscope unit 10. The structure of oscilloscope data is shown. It is a block diagram of a grouping table. FIG. 6 is a configuration diagram of another example of the oscilloscope unit 10. An example of the sampling data input into a digital input terminal is shown.

Explanation of symbols

10-13-N oscilloscope unit 20 oscilloscope server 201 oscilloscope data extraction unit 201a grouping table

Claims (2)

An input signal receiving terminal for receiving a current signal or a voltage signal for at least one signal input channel; a contact signal receiving terminal for receiving a contact input signal for at least one contact input channel; and an inter-unit activation interface terminal; A memory for storing sampling data of a current signal or a voltage signal input to the signal input channel, and a plurality of oscilloscope data including the sampling data stored in the memory based on a trigger signal With the oscilloscope,
An oscillo server including an oscilloscope data extraction unit that extracts specific oscilloscope data based on a preset grouping table from the oscilloscope data,
The inter-unit activation interface terminals of each of the plurality of oscilloscope units are connected to each other. When a contact input signal is input to a contact input channel of any oscilloscope unit, the trigger signal is generated and all Output to the oscilloscope,
Each group of the oscilloserver grouping table stores the signal input channel and the contact input channel together with the unit number of the oscilloscope unit,
The oscillo data extraction unit of the oscillo server, when a contact input signal is input to any contact input channel of each group, oscilloscope data including sampling data from the signal input channel of the group is used as the specific oscilloscope data. An oscilloscope data collection and selection device to extract.   Whether each of the plurality of oscilloscope units is based on the oscilloscope unit number and the contact input signal input to the contact input channel when the trigger signal is generated or is received at the inter-unit activation interface terminal The oscilloscope data collection and selection device according to claim 1, wherein oscilloscope data including trigger factor data for identifying whether or not, sampling data for a predetermined period, and a contact input signal is output.

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