JP2000349918A - Transformer measurement terminal using phs, and low voltage line load monitor system using the - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low voltage line monitor system that eliminates the need for installation of a communication line and collects a voltage, a load current and a ground line current in real time. SOLUTION: The transformer measurement terminal is provided with a means 3, that measures or calculates data relating to loads from a secondary side of a pole transformer, low voltage lines and consumer facilities and a means that transmits the data to a mater station by a PHS 13. Furthermore, the low voltage line load monitor system includes a master station that receives the data sent from the PHS. The data relating to loads from a secondary side of a pole transformer, low voltage lines and consumer facilities may include measured values, setting information of the measurement types and fault information of voltage, load currents, and ground line currents from the secondary side of a pole transformer, low voltage lines and consumer facilities. The system may be provided with a memory 4 and a calendar 15 that can store at least a prescribed period of the data relating to loads from a secondary side of a pole transformer, low voltage lines and consumer facilities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a system for monitoring a load from a secondary side of a pole transformer and a low voltage line to a customer facility.

[0002]

2. Description of the Related Art In a conventional pole transformer, a transformer measuring terminal is installed for correlation measurement of load management, and a secondary voltage and a load current of the transformer (U-phase and V-phase in a transformer shared by lights) are installed. ,
W-phase), the ground line current is measured and the data is transmitted to the master station. For this data transmission, a communication line such as an optical fiber or a communication cable is used. Therefore, it is necessary to lay communication lines, and there is a problem that the cost increases.

In the conventional correlation measurement (correlation data analysis of power consumption and single-phase load current), a dedicated current measuring device is attached and measured each time. However, there has been a problem that the mounting and dismounting of the measuring instrument occurs each time, and it takes time to collect and analyze data at a plurality of measuring points.

[0004] Further, from low-voltage lines to customer facilities,
When a voltage or current measurement occurred, a dedicated voltage / current measurement device was attached for each measurement and data analysis. However, it is good to constantly measure voltage and current,
When data and information at the time of occurrence of abnormal voltage and current are required, there is a problem that data cannot be obtained by this method.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a low voltage line load monitoring system which does not require the laying of communication lines and can collect voltage, load current and ground line current in real time. Is to provide.

[0006]

Means for Solving the Problems To solve the above-mentioned problems, a transformer measuring terminal device using a PHS according to the present invention stores data on loads from a secondary side of a pole transformer and a low-voltage line to customer facilities. It is provided with means for measuring or calculating and means for transmitting the data to the master station by PHS. Further, a low-voltage line load monitoring system according to the present invention includes the transformer measurement terminal device having the above-described configuration, and a master station that receives data transmitted from the PHS.

As data relating to the load from the secondary side of the pole transformer and the low voltage line to the customer equipment, the voltage, load current, and ground line current from the secondary side of the pole transformer and the low voltage line to the customer equipment are provided. And the setting of measurement values and measurement types, and abnormality information.

[0008] Further, it is provided that a memory and a calendar capable of storing at least a certain period of data relating to loads from the secondary side of the pole transformer and the low voltage line to the customer equipment are provided.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an example in which the present invention is applied to a three-phase four-wire type distribution line.

FIG. 1 is a block diagram showing an outline of a low voltage line load monitoring system according to the present invention.

In FIG. 1, 1 is a utility pole, 2 is a pole transformer, 3 is a slave station which is a transformer measuring terminal, 4 is a public base station,
Reference numeral 5 denotes a public network, 6 denotes a PIAFS-compatible TA (terminal adapter), and 7 denotes a transformer correlation measurement master station.

The data signal transmitted from the slave station 3 is PH
S is received by the public base station 4 of S,
6 and received by the master station 7. Also, from the parent station 7,
It is also possible to transmit polling of a data transmission request to the slave station 3 via the public line network 5, or to make settings for the slave station 3.

FIG. 2 is a block diagram showing the configuration of the slave station 3. The U-, V-, and W-phase currents of the three-phase four-wire distribution line are detected by the search coil 11 and the secondary voltage of each phase is detected. Is detected. Also, a CT (instrument transformer) 1 for detecting ground line current
2 is provided to detect the ground line current. These measurement data are transmitted to the master station 7 by the PHS 13. Further, the transformer measuring terminal is provided with a memory 14 and a calendar 15 for storing data for a certain period, for example, 33 days, and transmits the data in the memory 14 in response to a request from the master station 7.

The master station 7 collects and analyzes the received data, and calculates the load current of the single-phase load, thereby analyzing the correlation between the power consumption of the customer and the load current.

Table 1 shows an example of basic measurement specifications of a transformer measuring terminal.

[Table 1]

Table 2 shows the abnormal information measurement and the measurement period of the low-voltage load monitoring system.

[Table 2]

FIG. 3 is a block diagram showing another example of the low-voltage line load monitoring system of the present invention.

In FIG. 3, 1 is a utility pole, 2 is a pole transformer, 3 is a slave station which is a transformer measuring terminal, 4 is a public base station,
5 is a public network, 6 is a PIAFS-compliant TA (terminal adapter), 7 is a transformer correlation measurement master station, 16 is a service line for a low-voltage customer, and 17 is a customer facility.

The data signal transmitted from the slave station 3 is PH
S is received by the public base station 4 of S,
6 and received by the master station 7. Also, from the parent station 7,
It is also possible to transmit polling of a data transmission request to the slave station 3 via the public line network 5, or to make settings for the slave station 3.

[0020]

According to the present invention, the following effects can be obtained. (1) Since PHS is used for data transmission, it is not necessary to lay communication lines for data transmission, and costs can be reduced. Also, maintenance of the communication line is not required.

(2) In the conventional correlation measurement, a dedicated measuring device is used, and each time the measuring device is attached to a low voltage line or a service line, and after measurement, it is removed and brought back to analyze data.
According to the present invention, measurement can be performed in real time, so that it is possible to save time and labor in visiting a site and labor in an analysis operation.
In addition, by always setting it on site, sudden abnormalities can be dealt with immediately.

(3) By storing data for at least a certain period in the memory, past data can be collected when necessary.

(4) The setting of the slave station can be performed by the PHS from the master station without going to the installation site.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an outline of a low voltage line load monitoring system of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a slave station.

FIG. 3 is a configuration diagram showing another example of the low-voltage line load monitoring system of the present invention.

[Explanation of symbols]

1 telephone pole, 2 pole transformer, 3 slave station (transformer measuring terminal), 4 public base station, 5 public line network, 6 TA (terminal adapter), 7 master station for transformer correlation measurement, 11
Search coil, 12 CT (instrument transformer), 13 P
HS, 14 memories, 15 calendars, 16 low-voltage customer service lines, 17 customer facilities

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichiro Hashimoto 4445-1, Fukuma-cho, Munakata-gun, Fukuoka Prefecture Inside Tokyo Equipment Manufacturing Co., Ltd. (72) Fumitaka Morita 2-1-2, Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture No. Kyushu Electric Power Co., Ltd. AA00 BA32 CA03 CA08 DA02 DB01 DC01 EA11 EB06 EB10 EB11 EB12 FC01 GB08 GC03 HA01 HA02 HA05 HA07 5K101 KK12 LL03 LL12 MM04 MM07 NN21 QQ04 RR13 RR17 SS07 TT06 UU16

Claims (4)

[Claims] 1. A system comprising: means for measuring or calculating data relating to a load from a secondary side of a pole transformer and a low voltage line to a customer facility; and means for transmitting the data to a master station by PHS. Transformer measurement terminal device using PHS. 2. The data relating to the load from the secondary side of the pole transformer and the low voltage line to the customer equipment, the voltage, load current, and ground from the secondary side of the pole transformer and the low voltage line to the customer equipment. The transformer measurement terminal device using the PHS according to claim 1, wherein the terminal device includes a setting of a measurement value such as a line current and a measurement type and abnormality information. 3. A transformer measuring terminal device using a PHS provided with a memory and a calendar capable of storing at least a fixed period of data relating to loads from a secondary side of a pole transformer and a low voltage line to customer equipment for a certain period. 4. A transformer measuring terminal device comprising: means for measuring or calculating data relating to a load from a secondary side of a pole transformer and a low voltage line to a customer facility; and means for transmitting the data to a master station by PHS. And a master station for receiving data transmitted from the PHS.