JP2002092769A - Remote monitoring system for distributed power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with respective coping by a maintenance engineer by constructing a remote monitoring system for a distributed power supply, reduce a large amount of communication generated during continuously monitoring at a center, and thereby effectively and economically operate the remote monitoring system. SOLUTION: This remote monitoring system for the distributed power supply is constituted with an operation data obtaining means 110 for obtaining operation data of the distributed power supply 10, a log information storage means 120 for storing the operation data, a log information transmitting means 130 for transmitting the stored log information to a host computer of the center, a sensor input means 140 for inputting a sensor value of an external sensor 50, an abnormality detecting means 150 for analyzing the operation data and the sensor value to detect the abnormality, an alarm issue means 160 for issuing an alarm to the host computer of the center when any abnormality is detected, and an operation stopping means 170 for outputting an operation stopping signal with respect to the distributed power supply 10 when any abnormality is detected in the sensor value inputted by the sensor inputting means 140.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributed power supply remote monitoring system for connecting a distributed power supply installed at a customer to a host computer of a center via a communication line, collecting operation data, and monitoring an operation state. .

[0002]

In recent years, with the improvement of living standards, the demand for electric power in particular time zones in summer and winter has become remarkable due to the spread of cooling and heating equipment. Since electricity cannot be stored, utilities will have to upgrade their facilities to meet peak demand for a relatively short period of time, but this will cause equipment to be idle during off-peak hours, deteriorating the annual load factor. This is a factor that reduces business efficiency.

[0003] On the other hand, a distributed power source that uses a microminiature distributed power generation technology, which is expected to be put into practical use in the near future, allows consumers to control the time zone and amount of power generation in accordance with the power consumption pattern. It is expected to greatly contribute to load following and peak cutting, which are difficult to handle. In the context of these social and technological changes and the deregulation of the entire economic system becoming a global trend, the use of distributed power generation that introduces market principles that are meaningful in energy policy will bring a new power generation business. Expected.

When a distributed power source is introduced as a power generation business and power is supplied to a large number of users, it is necessary to maintain the reliability, safety and economy of the distributed power source based on the security regulations of the Electricity Business Law. In addition to maintenance inspections, it is necessary to constantly monitor the operating conditions, find abnormalities early, and take appropriate measures promptly by maintenance technicians. In addition, in order to meet the equipment requirements of the Electricity Business Act, an alarm to notify maintenance technicians of abnormalities that cannot be detected by the power generation equipment itself, such as fires in the power plant, gas leaks, abnormally low fuel levels, etc. Equipment needs to be installed. In addition to these measures, in order to obtain guidelines such as preventive maintenance and optimal operation methods, it is necessary to continuously record and diagnose the operating state.

[0005] For this reason, it is necessary for a distributed power supply company to dispatch a maintenance technician to a customer or make it resident to monitor the operating state of the distributed power supply and abnormalities in the power plant. However, it is difficult and inefficient to dispatch a maintenance technician to each customer individually, and it is not efficient in terms of securing human resources. It is common practice to remotely monitor the operating state with a host computer at the center. When remote monitoring is performed, a large amount of traffic is generated and congestion occurs when the operation data of distributed power sources installed at many customers is constantly collected via a communication line. For this reason, if a line is connected every time in response to a call from a distributed power source, a communication procedure is established, and data is exchanged, the processing capacity of the computer cannot keep up, and depending on the processing capacity of the computer, a large amount of waiting may occur. Will occur.

In order to solve this problem, it is necessary to connect a distributed power supply and a host computer one-to-one with a dedicated line and to introduce a high-performance large-scale computer to process data. Is greatly improved. In addition, the line usage fee increases significantly and the operating cost burden increases.

Accordingly, the present invention constructs a remote monitoring system for a distributed power source to eliminate the need for individual service by maintenance technicians, and greatly reduces the amount of communication that occurs when monitoring at the center at all times. It is intended to make the operation of the monitoring system more efficient and economical.

[0008]

In order to achieve the above object, the present invention is configured as follows.

That is, according to the first aspect of the present invention, the operation is controlled by incorporating a CPU, and a distributed power source having a communication port for monitoring and a self-contained monitoring unit are connected via the communication port. The unit and the host computer of the center are connected via a communication line, and the monitoring unit is configured to obtain operating data obtaining means for obtaining operating data of the distributed power supply via the communication port at predetermined intervals, and analyze the obtained operating data. A remote monitoring system for a distributed power supply, comprising: an abnormality detecting means for detecting an abnormality in the distributed power supply; and an alarm transmitting means for transmitting an alarm to the host computer when the abnormality is detected. According to a second aspect of the present invention, there is provided a log information storage unit that stores the operation data acquired by the monitoring unit as log information in a memory, and a log information transmission unit that transmits the stored log information to the host computer at predetermined time intervals. The remote monitoring system for a distributed power source according to claim 1, comprising: The distributed power source according to claim 1, wherein an external sensor is connected to the monitoring unit, and an alarm is transmitted to the host computer when an abnormality is detected by inputting a sensor value of the external sensor. Is a remote monitoring system. According to a fourth aspect of the present invention, there is provided the remote monitoring system for a distributed power source according to the third aspect, wherein when an abnormality is detected by inputting a sensor value of the external sensor, an operation stop signal is output to the distributed power source. . The invention according to claim 5 is the remote monitoring system for a distributed power supply according to claim 3, wherein the external sensor is a fire detection sensor. The invention according to claim 6 is the remote monitoring system for a distributed power supply according to claim 3, wherein the external sensor is a gas leak detection sensor. The invention according to claim 7 is the remote monitoring system for a distributed power source according to claim 3, wherein the external sensor is a fuel remaining amount detection sensor. The invention according to claim 8 is the remote monitoring system for a distributed power supply according to claim 1, wherein the communication line is a portable / PHS wireless line.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a remote monitoring system of a distributed power supply embodying the present invention. In the remote monitoring system, a monitoring terminal 20 is connected to a distributed power source 10 installed at a customer via a communication port a, and a host computer 40 of a monitoring center is connected via a packet communication line 30 of a digital mobile phone network.
Connect to

The distributed power source 10 has a built-in CPU such as a micro gas turbine to control the operation, and has a communication port a for monitoring. And cogeneration equipment. In addition, the apparatus is not limited to the one that is driven stationary, and may be one that is mounted on a vehicle and operated while moving. As an example of the distributed power supply 10,
For example, the Capstone Micro Gas Turbine of the United States has a built-in CPU assuming network use, can obtain operation data by command / response through a communication port, and displays all operation states on the screen of a personal computer. be able to. For this reason, even if it is operating in Japan, it can be monitored by Capstone in the United States via a telephone line. Further, software for group control assuming about 40 cooperative operations can be incorporated.

The monitoring terminal 20 comprises a monitoring unit 21 and a communication unit 22, and includes a distributed power source 10 and a monitoring unit 2.
1, and the connection between the monitoring unit 21 and the communication unit 22 are performed via the RS232C standard protocol. In addition, an external sensor 50 is installed around the power generation facility, and A
Monitoring unit 21 via a / D converter (not shown) or the like
To the I / O port of The external sensor 50 includes, for example, a fire sensor 51 for detecting the occurrence of a fire, a gas leak sensor 52 for detecting a gas leak, a fuel remaining sensor 53 for detecting an abnormal decrease in the remaining fuel, and the like. In addition, by installing a fuel flow sensor for obtaining billing information, a security sensor for obtaining security information, and the like, it is possible to further enhance safety and added value.

The packet communication line 30 is wirelessly connected to the communication unit 22 via a base station 31 and is connected to a gateway 32.
To the fixed telephone network via. Host computer 4
0 is configured by connecting a plurality of personal computers 42 and a server 43 to a router 41 connected to a high-speed digital dedicated line or an ISDN line.

FIG. 2 is a block diagram of a monitoring unit embodying the present invention. The monitoring unit 21 includes the distributed power source 10
An operation data acquisition unit 110 that issues a command at regular time intervals to acquire operation data, a log information accumulation unit 120 that accumulates the acquired operation data in the memory as log information, and stores the log information accumulated in the memory Log information transmitting means 130 for transmitting to the host computer 40 of the center via the communication unit 22 at normal time, and sensor input means 1 for inputting the sensor value of the external sensor 50 at regular time intervals
40, an abnormality detection unit 150 that analyzes the operation data acquired by the operation data acquisition unit 110 and the sensor value input by the sensor input unit 140 and detects an abnormality, and alerts the center host computer 40 when an abnormality is detected. And an operation stop unit 170 that outputs an operation stop signal to the distributed power source 10 when an abnormality is detected in the sensor value input by the sensor input unit 140.

The monitoring unit 21 may issue an operation command to the distributed power supply 10 based on a command from the host computer 40 so that the system can be started and stopped and the output power level can be adjusted. Thereby, unattended operation of the distributed power supply 10 by remote control becomes possible.

FIG. 3 shows a timing chart when transmitting log information. The monitoring unit 21 operates at a certain time interval (T
In 1), a command is issued to the distributed power source 10 to acquire operation data. The acquired operation data is stored in the memory as log information. The log information stored in the memory is transmitted to the host computer 40 at a certain time interval (T2). As a result, the operation data acquired every T1 (seconds) is transmitted as log information every T2 (time units), so that the communication amount between the distributed power supply 10 and the host computer 40 at the center is compressed to T1 / T2. .

FIG. 4 shows a timing chart when an alarm is issued. The monitoring unit 21 operates at a certain time interval (T1)
Issue a command to the distributed power source 10 to acquire operation data. At the same time, the sensor value of the external sensor 50 is input. The obtained operation data and the input sensor value are analyzed to determine whether there is any abnormality. When an abnormality is detected, an alarm is transmitted to the host computer 40 of the center. When an abnormality is detected in the input sensor value, an operation stop signal is output to the distributed power supply 10. Data collection is restarted at a certain time (T3) after the abnormality is detected. Thereby, T1
An alarm is transmitted to the host computer 40 of the center only when an abnormality is detected by analyzing the operation data acquired every second (in seconds) and the input sensor value, so that the distributed power supply 10 for detecting the abnormality and the host of the center are provided. The communication volume between the computers 40 becomes zero.

The distributed power supply remote monitoring system embodying the present invention has the above-described configuration, and has a distributed power supply 1 installed at a customer site.
0, the monitoring unit 21 is connected, a command is issued at regular time intervals, and operation data of a predetermined monitoring item is acquired. Monitored items include operating time during startup, shutdown, and steady operation, engine speed, power generation, current, voltage, frequency, temperature data around compressors, turbines, combustion chambers, and generators, and pressure data. , And there are various types of trouble report data by light / medium / heavy level.

[0020] The acquired operation data may be maximum if necessary.
Processing such as minimum and average is performed, and the information is stored in the memory as log information. The log information accumulated in the memory is transmitted to the host computer 40 collectively at every hour. The host computer 40 stores the received log information in the database for each holding period. Also edit the log information and edit
Display graphs such as daily reports, monthly reports, and annual report trends on the screen 2 and the printer.

When an abnormality is detected by analyzing the operation data acquired at the same time, an alarm is transmitted to the host computer 40. The host computer 40 displays an alarm on the screen of the personal computer 42 to notify the center operator of the abnormality. The center operator dispatches a technician to the site in response to the abnormality notification. Similarly, when an abnormality is detected by inputting the sensor value of the external sensor 50, an alarm is transmitted to the host computer 40. In this case, the distributed power supply 10
Outputs an operation stop signal in response to

[0022]

As described above, the remote monitoring system for a distributed power supply according to the present invention connects the monitoring unit to the distributed power supply, collects operation data, analyzes them, and detects an abnormality by detecting a communication line. An alarm is sent to the host computer of the center via the PC. Therefore, according to the present invention, it is not necessary to individually dispatch or resident maintenance technicians to many customers, and the operation state is usually monitored offline, and the center host computer is online only when an abnormality occurs. , The communication amount between the terminal and the center required for remote monitoring can be suppressed to zero.
Further, since the alarm is issued in real time, the response at the time of the occurrence of the trouble becomes quick.

Further, the remote monitoring system of the distributed power supply according to the present invention stores the operation data collected by the monitoring unit in a memory as log information, and collectively collects the data of the center at regular time intervals at predetermined time intervals via a communication line. Send to host computer. Therefore, according to the present invention, since the operation data collected in units of seconds is transmitted as log information to the host computer of the center in a single unit of time, the communication volume between the terminal and the center required for collecting the operation data can be significantly reduced. Can be. As a result, even when a large number is monitored at once, the load on the host computer required for collecting the operation data is greatly reduced, and the host computer at the center can be downsized to the personal computer level. In addition, since the operation data is stored in the monitoring unit, a degraded operation at the time of a line failure can be performed, and a wireless line that has been conventionally used for operation monitoring because of low reliability can be used. Further, it becomes possible to diagnose the collected log information to foresee the occurrence of a failure, and to present advice such as an optimal driving method.

In the remote monitoring system for a distributed power source according to the present invention, a fire detection sensor, a gas leak detection sensor, a fuel remaining amount detection sensor, and the like are connected to the monitoring unit, and the values of these sensors are input to detect an abnormality. At that time, an alarm is sent to the host computer of the center. At this time, an operation stop signal is simultaneously output to the distributed power source. Therefore, according to the present invention, an alarm device is provided to notify the occurrence of a serious failure that cannot be detected by the power generation equipment main body, such as the occurrence of a fire, a gas leak, or an abnormally low fuel level. As a result, necessary measures for safety measures are taken independently, so that sufficient safety can be ensured, and as mentioned above, wireless lines that could not be used for operation monitoring due to low reliability in the past were used. Become.

In the remote monitoring system for a distributed power supply according to the present invention, the monitoring unit is connected to the host computer of the center via a portable / PHS wireless line. Therefore, according to the present invention, as compared with the case where a fixed telephone line is used, a contract fee, facility installation fee, construction cost, etc., which are higher than a mobile / PHS required for obtaining a subscriber telephone number, are required. And the procedure time can be shortened. In addition, it is easy to temporarily install, relocate, or use while moving during an event or the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a distributed power supply remote monitoring system embodying the present invention.

FIG. 2 is a block diagram of a monitoring unit embodying the present invention.

FIG. 3 is a timing chart when transmitting log information.

FIG. 4 is a timing chart when an alarm is issued.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Distributed power source 20 Monitoring terminal 21 Monitoring unit 22 Communication unit 30 Packet communication line 31 Base station 32 Gateway 40 Host computer 41 Router 42 Personal computer 43 Server 50 External sensor 51 Fire sensor 52 Gas leak sensor 53 Fuel remaining sensor 110 Operating data acquisition means Reference Signs List 120 log information storage means 130 log information transmission means 140 sensor input means 150 abnormality detection means 150 alarm transmission means 170 operation stop means a communication port

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 9/00 311 H04Q 9/00 311K 321 321D (72) Inventor Rikiya Abe 2 Midorigaoka, Ninomiya-cho, Naka-gun, Kanagawa Prefecture No. 2-3, No. 3 (72) Inventor Noriyuki Mori No. 39, No. 1-10-10, Higashi-Arima, Miyamae-ku, Kawasaki-shi, Kanagawa Prefecture (72) Inventor Tadayoshi Kosugi 5--8, Midorigaoka, Yachiyo-shi, Chiba Prefecture Koji 1-8-23 Tsutsui, Onojo City, Fukuoka Prefecture (72) Inventor Yoshio Sadamori 6-7-7 Kikari, Inzai City, Chiba Prefecture (72) Inventor Yukinori Saeki 105-11 Setooka, Akiruno City, Tokyo (72) ) Inventor Seichiro Yamaguchi 129-4, Imai Nishicho, Nakahara-ku, Kawasaki-shi, Kanagawa Mansion Hisato 201 F-term (reference) 5C087 AA02 AA03 BB14 BB51 BB65 BB74 DD04 DD07 EE07 FF08 FF19 GG19 GG36 GG69 5G064 AA01 AA07 AB01 AC01 AC06 AC11 BA01 BA09 CB11 CB16 DA02 5K048 AA05 BA22 CA03 DA07 DC01 DC07 EB10 EB12 EB13 HA02 5K101 KK13 LL12 NN12 MM07

Claims (8)

[Claims] A self-supporting monitoring unit and a distributed power source having a built-in CPU for controlling operation and having a communication port for monitoring are connected via the communication port. Operating data acquisition means for acquiring operation data of the distributed power supply via the communication port at predetermined intervals, and analyzing the acquired operation data. A remote monitoring system for a distributed power supply, comprising: abnormality detecting means for detecting abnormalities by means of an alarm; and alarm transmitting means for transmitting an alarm to the host computer when abnormalities are detected. 2. A log information accumulating means for accumulating the acquired operation data in a memory as log information in the monitoring unit; a log information transmitting means for transmitting the accumulated log information to the host computer at predetermined time intervals; The remote monitoring system of a distributed power supply according to claim 1, further comprising: 3. The remote power source of a distributed power source according to claim 1, wherein an external sensor is connected to the monitoring unit, and when an abnormality is detected by inputting a sensor value of the external sensor, an alarm is transmitted to the host computer. Monitoring system. 4. The remote monitoring system for a distributed power supply according to claim 3, wherein an operation stop signal is output to the distributed power supply when an abnormality is detected by inputting a sensor value of the external sensor. 5. The remote monitoring system according to claim 3, wherein the external sensor is a fire detection sensor. 6. The remote monitoring system according to claim 3, wherein the external sensor is a gas leak detection sensor. 7. The remote monitoring system for a distributed power supply according to claim 3, wherein said external sensor is a fuel remaining amount detection sensor. 8. The remote monitoring system for a distributed power supply according to claim 1, wherein the communication line is a portable / PHS wireless line.