JP2002238186A - Remote monitor system for distributed power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope more smoothly with trouble that can occur on site and support the improvement of an economical operating method for a distributed power supply, total utility management, and active energy-saving measures. SOLUTION: A monitoring unit 20 transmits performance data of the distributed power supply 10 to a central host computer 50 via a communication unit 30 and further analyzes the performance data and sensor values from an external sensor 70 to detect anomalies. Then the monitoring unit gives an alarm to the host computer 50 and further causes a display unit 60 to display the related trouble information. In addition, the monitoring unit integrates the quantities of electricity generated, based on the performance data of the distributed power supply 10, and based on this data and an integrated quantity from an external meter 80, calculates electricity charge to cause the display unit 60 to display the charge. Furthermore, based on set values for energy-saving operation from a set value inputting means 220 and sensor values from the external sensor 70, the monitoring unit sets controlled variables for an external device 90 and outputs control signals to control the operation of the external device 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring system for a distributed power supply that provides a distribution service information to a user by connecting a display unit to a monitoring unit of the distributed power supply.

[0002]

In a remote monitoring system for a distributed power supply, a monitoring unit for collecting and communicating operation data is installed at a customer, and the operation data is transmitted to a monitoring center using a communication line such as a telephone line. In addition, by monitoring the operating state of the system in real time, it is possible to quickly respond to the occurrence of a failure or the like. In addition, daily operation data is accumulated, and the operating state is diagnosed at the monitoring center so that advice such as preventive maintenance of the equipment and an efficient operation method can be provided.

On the other hand, the introduction of a distributed power source is installed at the end of a power system (a power demand location) to reduce transmission and transformation losses, use waste heat, cut peaks by grid connection operation, level the load,
The purpose is to reduce electricity rates at low power generation costs.

In the grid-connected operation, since a distributed power source is operated in parallel with a commercial power source of a power company, not only high-efficiency operation is possible with a load close to 100%, but also the capacity is reduced even if there is a sudden load change. Since it is absorbed by a large commercial power supply, stable operation at both voltage and frequency is possible. As described above, the grid-connected operation is greatly supported by the commercial power source,
You have to sign a reserve power contract (self-supplying power contract) and pay the cost.

[0005] The electricity rate is composed of a basic rate and an electricity rate rate. The basic rate is proportional to the contracted power, and the smaller the contracted power, the lower the payment. However, if the margin is too small, the load decreases sharply. Since the follow-up of the generator is delayed, the generated power increases with respect to the load, and a reverse power flow occurs. In addition, if the load increases abruptly, the following of the generator is delayed, so that the shortage is compensated on the commercial power supply side, and the received power exceeds the contracted power. Therefore, reducing the contract power by changing the load pattern of the power demand is a key point for economical operation of the distributed power source. To this end, it is necessary for the site side to fully understand the operating state of the distributed power source including the generated power and the received power on a regular basis.

[0006] In addition to knowing the operating state, grasping the electricity rate is also effective for economical operation of the distributed power source. In addition, by grasping the usage fee of total utilities including gas and water as well as electricity, comprehensive energy resource savings can be expected. In addition, by setting the set temperature of the air conditioner and the supply voltage of the power saving device appropriately, it is possible to take an aggressive energy saving measure.

However, in the conventional remote monitoring system for a distributed power source, there is nothing displayed at the installation location of the distributed power source. For this reason, there is a problem that not only the operation state cannot be grasped on the site side, but also if the failure occurs, the situation is recognized only by contact from the center and the response on the site side is delayed.

Accordingly, the present invention provides appropriate information at a location where a distributed power source is installed, thereby making it possible to smoothly cope with a failure at the site, improving the economical operation method of the distributed power source, and improving the total utility. It is intended to support management and active energy saving measures.

[0009]

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, a monitoring unit having an operation data collection unit and a communication unit is connected to a distributed power source, and the operation data is transmitted to a host computer of the center via a communication line to transmit the operation data to the distributed power source. A remote monitoring system for a distributed power supply, wherein the monitoring unit includes an information display means, and the information display means displays distribution service information for a user. The invention according to claim 1 is the distributed power supply remote monitoring system according to claim 1, wherein the distribution service information is failure information of the distributed power supply. The invention according to claim 1 is the distributed power supply remote monitoring system according to claim 1, wherein the distribution service information is generated power of a distributed power supply or received power from a commercial power supply. A fourth aspect of the present invention is the remote monitoring system for a distributed power source according to the first aspect, wherein the distribution service information is an electricity rate, a gas rate, or a water rate. According to a fifth aspect of the present invention, there is provided the remote monitoring system for a distributed power source according to the first aspect, wherein the distribution service information is a saving amount of an electricity bill. According to a sixth aspect of the present invention, there is provided the remote monitoring system of the distributed power source according to the first aspect, wherein the monitoring unit includes a temperature control means for controlling a set temperature of the air conditioning equipment. Claim 7 The invention of claim 1 is
2. The remote monitoring system for a distributed power supply according to claim 1, wherein the monitoring unit includes a voltage control unit that controls a supply voltage of the power saving device.

[0011]

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 for a distributed power supply, a distributed power supply 10 for system interconnection operation is installed at a customer, and a monitoring unit 20 is connected thereto. The monitoring unit 20 connects to the communication unit 30 and communicates with the host computer 50 of the monitoring center via the packet communication line 40 of the digital mobile phone network, and performs remote monitoring of the distributed power supply 10. The display unit 60 is connected to provide various information.

The monitoring unit 20 also includes an external sensor 70 for detecting an abnormality that cannot be detected by the power generation equipment main body and an indoor / outdoor temperature, an external meter 80 for transmitting an integrated amount of a total utility, and a control target for energy saving operation. External device 90 is connected.

The connection between the monitoring unit 20 and the communication unit 30, the display unit 60, the external meter 80, and the external device 90 is made via an RS232C interface, and the connection between the monitoring unit 20 and the external sensor 70 is isolated by an optical fiber link. Through the GPIB interface.

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 for monitoring that can be remotely monitored, such as a generator such as a diesel, gas engine, or a gas turbine for aeronautics. Targets cogeneration equipment.

The packet communication line 40 is wirelessly connected to the communication unit 30 via the base station 41,
To the fixed telephone network via.

The host computer 50 is configured by connecting a plurality of personal computers 52 and a server 53 to a router 51 connected to a high-speed digital leased line or an ISDN line.

The display unit 60 displays various kinds of information on a display panel such as an LED or a liquid crystal in the form of digital numbers or graphs.

The external sensor 70 includes, for example, a fire sensor 71 for detecting the occurrence of a fire, a gas leak sensor 72 for detecting a gas leak, a fuel remaining sensor 73 for detecting an abnormal decrease in the remaining fuel, and a temperature measurement for indoor and outdoor. Temperature sensor 74 or the like. In addition, by connecting a fuel flow sensor for obtaining billing information, a security sensor for obtaining security information, and the like, safety and added value can be further improved.

The external meter 80 includes, for example, an electric meter transmitter 81 for integrating electric power received from a power company, a gas meter transmitter 82 for integrating gas usage, and a water meter transmitter 83 for integrating water usage. And so on.

The external device 90 includes, for example, an air conditioner 91 and a power saving device 92 which perform an energy saving operation based on a command from a monitoring center.

FIG. 2 is a block diagram of a monitoring unit embodying the present invention. The monitoring unit 20 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 50 of the center via the communication unit 30 at the correct time; sensor value input means 140 for inputting the sensor value of the external sensor 70 at fixed time intervals; An abnormality detecting means 150 for analyzing the sensor value of the abnormality and detecting an abnormality, and an alarm transmitting means 160 for transmitting an alarm to the host computer 50 of the center when an abnormality is detected.
Fault information display means 170 for displaying fault information at 0, and power generation integrating means 180 for integrating the power generation from the operation data
An integrated amount input means 190 for inputting the integrated amount of the external meter 80; a charge calculating means 200 for calculating the charge based on the operation data and the integrated amount of the external meter 80; and a charge for displaying the charge information on the display unit 60. Information display means 210
And set value input means 22 for inputting set values for energy saving operation
0, a control amount setting means 23 for setting a control amount of the external device 90 based on the set value and the sensor value of the external sensor 70.
0 and an operation control means 240 that outputs a control signal of this control amount and controls the operation of the external device 90.

As shown in FIG. 3, the display unit 60 simultaneously displays the amount of power generated (kwh) and the amount of received power (kwh) on a digital display. In addition, as shown in FIG. 4, monthly usage amounts and charges of electricity, gas, and water are displayed. Further, as shown in FIG. 5, the generated power (kw) and the received power (kw) for each time are simultaneously displayed in a graph. In addition, weekly, monthly and yearly power generation (kw
h) and information such as the amount of received power (kwh) are displayed in a form such as a graph by switching the screen. The screen is switched by automatic switching by a timer or by manual switching by a button operation.

The electricity bill is displayed separately for the generated electricity bill, the received electricity bill, and the total electricity bill. Distributed power source 1
The generated power rate of 0 is converted to a commercial power rate, and the amount of saving of the power rate by private power generation is also presented. The calculation of the electricity bill is performed by referring to the contract electricity unit price of the basic charge and the electricity unit price of the energy charge stored in the table. As a result, it is possible to flexibly respond to a fee revision or the like simply by replacing the table.

As the contents displayed on the display unit 60, information such as current time, outside temperature, stock price information, news, and weather forecast may be displayed. Thereby, the display unit 60 can be effectively used as a transmission medium of various information.

The set value input means 220 inputs the set temperature of the air conditioner 91 and the set voltage of the power saving device 92. The set value is input to the monitoring unit 20 from the host computer 50 of the monitoring center via the communication unit 30. Alternatively, an input means such as a keypad may be connected to the monitoring unit 20 or the display unit 60 to directly input.

The control amount setting means 230 sets the control amount of the air conditioner 91 from the difference between the set temperature of the air conditioner 91 and the indoor and outdoor temperatures measured by the temperature sensor 74.

The operation control means 240 outputs a control signal based on a set temperature and a set voltage to a control device (not shown) of the air conditioner 91 and the power saving device 92.

The distributed power supply remote monitoring system embodying the present invention has the above-described configuration, and has the distributed power supply 1 installed at the customer site.
0, the monitoring unit 20 is connected, and a command is issued at regular time intervals to acquire operation data of a predetermined monitoring item. Further, an external meter 80 is connected to the monitoring unit 20 to input an integrated amount of gas or water in addition to the power received from the commercial power supply. The monitoring items include operating time at start-up, stop, and steady operation, engine speed, power generation, current, voltage, frequency, compressor, turbine, combustion chamber,
There are temperature data, pressure data around the generator, and trouble report data for light / medium / heavy levels.

The power generation amount per day is integrated from the acquired operation data, and the electricity rate is calculated from the integrated power amount and the integrated amount of the electric meter transmitter 81, and displayed on the display unit 60 in real time. In addition, a monthly usage fee for gas and water is calculated and displayed on the display unit 60. At the same time, operation data subjected to processing such as maximum / minimum / average as necessary is stored in the memory as log information. In addition, the amount of power generated and received every day is stored in a memory, edited weekly, monthly, and yearly and displayed in the form of a graph or the like. The log information stored in the memory is transmitted to the host computer 50 collectively at every hour. The host computer 50 stores the received log information in the database for each holding period. In addition, the log information is edited and the daily report, monthly report,
Display graphs such as annual report trends.

At the same time, when an abnormality is detected by analyzing the operation data and the sensor value of the external sensor 70, an alarm is transmitted to the host computer 50. At this time, a message notifying the occurrence of the abnormality is displayed on the display unit 60 at the same time. The host computer 50 displays an alarm on the screen of the personal computer 52 to notify the center operator of the abnormality. The center operator dispatches a technician to the site in response to the abnormality notification.

Further, if necessary, the set temperature of the air conditioner 91 and the set voltage of the power saving device 92 are input from the monitoring center to the monitoring unit 20 so that aggressive energy saving measures are implemented.

[0033]

As described above, the remote monitoring system of the distributed power supply according to the present invention has the information display means in the monitoring unit, and displays the failure information of the distributed power supply on the information display means. Therefore, according to the present invention, it is possible to quickly know the occurrence of an abnormality before receiving a communication from the monitoring center, so that the response on site can be promptly performed.

Further, the remote monitoring system of the distributed power supply of the present invention displays the generated power of the distributed power supply or the received power from the commercial power supply. Therefore, according to the present invention, the economic effect of private power generation can be maximized by optimizing the balance between generated power and received power by, for example, changing the load pattern according to the situation. In addition, since the generated power and the received power are displayed visually, the driving state can be understood at a glance, and the consumer can be given a sense of security and reliability.

Further, the remote monitoring system for a distributed power source according to the present invention displays an electricity rate, a gas rate or a water rate.
Therefore, according to the present invention, since the usage of the total utility can be comprehensively grasped, it is possible to comprehensively review consumption and promote energy saving.

Further, the remote monitoring system of the distributed power source according to the present invention displays the savings of the electricity bill. Therefore, according to the present invention, it is possible to provide a user with an incentive to save power and further enhance the economic effect of private power generation.

Further, the remote monitoring system for a distributed power supply according to the present invention includes control means for controlling a set temperature of an air conditioner and a supply voltage of a power saving device. Therefore, according to the present invention, more aggressive energy saving measures can be taken on site.

[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 display example of a power generation amount and a power reception amount of a display unit embodying the present invention.

FIG. 4 is a display example of a usage fee of a display unit embodying the present invention.

FIG. 5 is a display example of a power graph of a display unit embodying the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Distributed power supply 20 Monitoring unit 30 Communication unit 40 Packet communication line 41 Base station 42 Gateway 50 Host computer 51 Router 52 Personal computer 53 Server 60 Display unit 70 External sensor 71 Fire sensor 72 Gas leak sensor 73 Fuel remaining amount sensor 74 Temperature sensor 74 80 External meter 81 Electric meter transmitter 82 Gas meter transmitter 83 Water meter transmitter 90 External device 91 Air conditioner 92 Power saving device 110 Operation data acquisition means 120 Log information storage means 130 Log information transmission means 140 Sensor value input means 150 Abnormality detection means 160 Alarm transmission means 170 Fault information display means 180 Power generation integration means 190 Integrated amount input means 200 Charge calculation means 210 Charge information display means 220 Set value input means 230 Control amount setting means 240 operation control means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Rikiya Abe 2-2-2-3 Midorigaoka, Ninomiya-machi, Naka-gun, Kanagawa Prefecture Inventor Sumie Nakayama Room 1-1302, Kichijoji-Higashi-cho, Musashino-shi, Tokyo Room 302 (72) Inventor Tadayoshi Kosugi 5--8-7, Midorigaoka, Yachiyo-shi, Chiba (72) Inventor Koji Kakihara 1 Tsutsui, Onojo-shi, Fukuoka 8-23, Chome (72) Yoshio Sadamori, Inventor 6-7-7, Kikari, Inzai City, Chiba Pref. 129-4 Imai Nishi-cho, Nakahara-ku, Kawasaki-shi No. 201 Mansion Hisato F-term (reference) 5G064 AA07 AB03 AC01 AC05 AC09 BA02 BA09 CB08 CB12 CB18 DA05 5K048 BA08 BA22 EB 08 EB12 FB08 5K101 KK13 LL01

Claims (7)

[Claims] 1. A monitoring unit having an operation data collection unit and a communication unit is connected to a distributed power supply, and the operation data is transmitted to a host computer of a center via a communication line to remotely monitor an operation state of the distributed power supply. A remote monitoring system for a distributed power supply, wherein the monitoring unit includes information display means, and the information display means displays distribution service information for a user. 2. The distributed power supply remote monitoring system according to claim 1, wherein the distribution service information is failure information of the distributed power supply. 3. The remote monitoring system for a distributed power source according to claim 1, wherein the distribution service information is generated power of a distributed power source or received power from a commercial power source. 4. The remote monitoring system for a distributed power source according to claim 1, wherein the distribution service information is an electricity rate, a gas rate, or a water rate. 5. The remote monitoring system for a distributed power source according to claim 1, wherein the distribution service information is a savings on electricity bill. 6. The remote monitoring system for a distributed power supply according to claim 1, wherein said monitoring unit includes a temperature control means for controlling a set temperature of an air conditioner. 7. The remote monitoring system for a distributed power source according to claim 1, wherein the monitoring unit includes voltage control means for controlling a supply voltage of the power saving device.