JP2006316416A - Energy managing system and energy analyzing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy managing system which can perform an energy analysis such as the derivation of unit consumption for each process of a plant, and can find out effective energy saving measures, and to provide an energy analyzing system. <P>SOLUTION: A watt-hour meter 1 and a flow meter 2 are provided for each process of the plant, and measured values are transmitted via each controller 20 to a monitoring control system 10. The monitoring control system 10 acquires energy unit consumption in each process based on electric energy data and flow rate data, displays the unit consumption on a display section, and the data from a printer are outputted as a report. In this manner, the energy analysis such as the derivation of the unit consumption for each process of the plant can be performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an energy management system that performs energy management in a plant monitoring control system such as a water and sewage plant, and an energy analysis system that performs energy analysis on the plant.

  The Energy Conservation Law has been revised, and water and sewage utilities have become obliged to report energy usage at plants classified as Type 1 and Type 2 in Figure 6.

  In addition, since they have become obliged to save 1% annually, there is a growing need to analyze which processes in the plant use energy inefficiently. In energy saving analysis, it is important to derive the basic unit for each process (the following formula (1)).

Basic unit = Amount of power used * α / Amount of treated water ··· Formula (1)
(Where α is a coefficient calculated by the formula established by the Ministry of Economy, Trade and Industry to discount nighttime electricity consumption)
However, in the conventional monitoring and control system of the water and sewage plant, as shown in FIG. 7, among the plants comprising the processes of initial sediment 73, aeration tank 74, final sediment 75, concentrator 76, dehydrator 77,. In particular, only the power consumption of facilities that consume power, such as the aeration tank 74 and the dehydrator 77, is measured. Even if the power is measured, the monitoring control device 70 does not capture data, but only the field operation panel 80. Data may not be transmitted.

  That is, in the conventional monitoring and control system of a water and sewage plant, for example, reporting to the outside such as the country may be performed for the entire plant, and thus the power amount of the entire plant is measured from the power generation equipment 71 and the power reception equipment 72. It is not necessary to obtain the basic unit for each process, and the current situation is that the measurement of the electric energy for each process is not performed.

  Therefore, in the conventional monitoring and control system of a water and sewage plant, the amount of power for each process is not known, and the basic unit cannot be obtained for each process.

In addition, although analyzing and simulating public water data and performing virtual sensing of a place where no sensor is installed is described in Patent Document 1, for example, the method is specifically shown. It has not been done.
JP 2000-107744 A

  As described above, conventional monitoring and control systems for water and sewage plants have a problem that energy analysis such as deriving a basic unit for each process cannot be performed and effective energy saving measures cannot be found. .

  The present invention has been made in view of such conventional points, and can perform energy analysis such as deriving a basic unit for each process of a plant, and can find an effective energy saving measure. An object is to provide an energy management system and an energy analysis system.

  In order to achieve the above object, an energy management system according to the present invention is provided for each process of a plant, and includes an electric energy measuring means for measuring electric energy, a flow measuring means for measuring flow, and an electric energy measuring means. A basic unit calculating unit that calculates a basic unit for each process from the measured electric energy and the flow rate measured by the flow rate measuring unit is provided.

  In addition, the energy management system according to the present invention includes a flow rate measurement unit that measures a flow rate at a predetermined location in the plant, and a flow rate calculation that calculates an inflow rate to each process of the plant using the flow rate measured by the flow rate measurement unit. Power for calculating the amount of power for each process from the means, the means for obtaining the data on the operation rate for each process of the plant, the data on the operation rate for each process obtained by this means and the rated power total value for each process An amount calculation unit; and a unit calculation unit for calculating a unit for each process from the amount of power for each process calculated by the unit for calculating the amount of power and an inflow flow into each process calculated by the unit for calculating the flow rate. It is characterized by that.

  Further, the energy analysis system according to the present invention is a receiving means for receiving measurement data or data indicating the state of the equipment necessary for calculating the basic unit for each process transmitted from each plant via the network, Using the measurement data received by the receiving means or the data indicating the state of the equipment, the basic unit calculating means for calculating the basic unit for each process of each plant, and the basic unit for each process of each plant calculated by this means Transmitting means for transmitting the unit to each plant via a network is provided.

  According to the present invention, energy analysis such as deriving a basic unit for each process of a plant can be performed, and an effective energy saving measure can be found.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
An energy management system in a monitoring and control system for a water and sewage plant according to a first embodiment of the present invention will be described with reference to FIG.

  In this first embodiment, as shown in FIG. 1, compared to the prior art, a watt hour meter and a flow meter are provided for each process, and the power amount and flow rate of each process are taken into the monitoring control system. Is a feature.

  That is, as shown in FIG. 1, the watt-hour meter 1 is provided in each of the power generation equipment 11 and the power receiving equipment 12 as in the prior art, and each process, that is, the initial settling 13, the aeration tank 14, the final settling 15, and the concentrator 16 , A watt hour meter 1 and a flow meter 2 are provided in each of the dehydrators 17.

  In the supervisory control system of the first embodiment, an energy management function is added to the conventional supervisory control system function (for example, failure notification and process value display), so that the process (for example, initial subsidence or end of the process). It is characterized in that the basic unit for each settling, water treatment, sludge treatment, etc.) can be calculated in real time, displayed on the display unit of the monitoring control system 10, and output from the printer.

  That is, the measured values of the watt-hour meter 1 and the flow meter 2 provided in the initial settling 13, the aeration tank 14, the final settling 15, the concentrator 16, the dehydrator 17,. 10 and stored in a database provided in the monitoring control system 10. From the stored power amount data and flow rate data, the basic unit for each process is calculated in real time by the calculation means according to the above equation (1). It is calculated with a 1 minute period. The calculation result is displayed on the display unit provided in the monitoring control system 10 in real time, for example, at a cycle of 1 minute, and is output from the printer as a daily report, for example.

  In the monitoring control system according to the present embodiment, the power cost is calculated from the power amount in consideration of the contract fee and the nighttime power fee, and is displayed together with the above basic unit, or is output as a report from the printer. You can also.

  As described above, in the first embodiment, a watt hour meter and a flow meter are provided for each process of the water and sewage plant, and the energy intensity is reliably obtained for each process and displayed in real time. In addition to being able to confirm, there is an effect that a report can be created.

(Second Embodiment)
In the first embodiment described above, a method of calculating the energy intensity of each process by installing a flow meter and a watt-hour meter in each process of the water and sewage plant has been described. A method of calculating the energy intensity of each process (= power consumption of each process * α / processing flow rate of each process) when a flow meter and a watt hour meter are not installed in each process of the plant will be described.

  That is, in this second embodiment, the energy intensity of each process is estimated from the material balance of the flow rate, the rated power of the equipment for each process, and the operation rate of the process (the number of operations relative to the total number or the operation time per day). The method is shown below.

  First, a method for calculating the flow rate of each process will be described. As shown in FIG. 2, the sewage treatment process is composed of many processes, that is, a sand basin 21, an initial sedimentation basin 22, an aeration tank 23, a final sedimentation basin 24, and so on. Although the processing flow rate is not measured in all processes as described above, the flow rate provided at a predetermined location (for example, the location of the pump, etc.), the inflow flow rate of the previous process, the extraction sludge flow rate with the pump, etc. Is known, the processing flow rate of the subsequent process can be calculated from the mass balance of the flow rate. For example, in the case of the aeration tank 23, it is obtained by the following formula.

Q4 = Q1-Q2 + Q3
Here, Q1 is an initial flow rate into the sedimentation basin 22, Q2 is a raw sludge extraction amount, Q3 is a return sludge flow rate, and Q4 is an inflow rate into the aeration tank 23, that is, a treatment flow rate in the aeration tank 23. Similarly, the treatment flow rate of each process of the sewage treatment as shown in FIG. 2 can be calculated from the inflow flow rate of the previous process, the extraction sludge flow rate with the pump, and the like.

  Next, a method for calculating the electric energy of each process will be described. The amount of power for each process is calculated by the following formula.

W = Y × N
Here, W is the power amount of each process, Y is the total rated power value of the electrical equipment of each process, and N is the operation rate of each process (the number of operations relative to the total number or the operation time per day).

  The total rated power value of the electrical equipment of each process can be confirmed from the electrical equipment information for each process as shown in FIG. That is, it is possible to obtain the sum of the number of electric facilities in each process multiplied by the rated power (per unit).

  In addition, there are the following two methods for obtaining the operation rate (the number of operations relative to the total number or the operation time per day) of each process.

  (1) A method of assuming the operation rate of the process (the number of operations relative to the total number or the operation time per day) from the operation status of the main machine of each process.

  (2) A method of assuming the operation rate of the process (the number of operations relative to the total number or the operation time per day) from the rated capacity of each process.

  The above two methods will be described.

  First, as shown in Fig. 4, it is possible to apply the method that assumes the operation rate of the process (the number of operations relative to the total number or the operation time per day) from the operation / stop of the main machine in each process. (First sedimentation basin) 43, aeration tank 44, final sedimentation (final sedimentation basin) 45, concentrator 46, dehydrator 47, etc. Operation / stop signals and valve open / close states indicating the operation state 3 of the main equipment of each process 4 is transmitted to the monitoring control system 40 via the controller 50, and these signals are collected by the monitoring control system 40.

  In this method, the main machine is set for each process. For example, in the process shown in FIGS. 3 and 4, the main machine of the first settling basin 43 is the main sludge collector, the main machine of the aeration tank 44 is the blower, the main machine of the final sedimentation tank 45 is the main sludge collector. The main machine to be set includes the electrical equipment for which operation / stop signals are collected by the monitoring control system 40 (if there are multiple types of electrical equipment for which operation / stop signals are collected, Select the electrical equipment that best represents the percentage. In this method, when the main machine is installed in each series, the operation rate (number of operations / total number) can be calculated from the number of process operations, and at least the operation rate (operation time / 24 hours) can be known from the operation time of the process. Can do.

  Next, a method of assuming the operation rate of the process (the number of operations relative to the total number or the operation time of one day) from the rated capacity of each process in (2) will be described.

  In this method, the rated capacity for each process is set. For example, when the water area load d of the first sedimentation basin 43 (= the amount of treated water per day or per minute / the area of the first sedimentation basin) is set as the rated capacity, the operation rate of the pond (the number of operations relative to the total number or one day) (Operating time) N is calculated by the following equation.

N = Q1 / d / S
Here, S is the area of the first settling basin 43. When Q1 is the flow rate per day, d is the amount of treated water per day / area of the first sedimentation basin. When Q1 is the flow rate per minute, d is the amount of treated water per minute / area of the first sedimentation basin. And

  Similarly, the operation rate (the number of operations relative to the total number or the operation time per day) of each process of sewage treatment as shown in FIGS. 3 and 4 can be calculated from the treatment flow rate and the rated capacity.

  As described above, in the second embodiment, even for a process in which no flow meter or watt meter is installed, the flow rate and the electric energy can be calculated and the energy intensity for each process can be obtained.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 5, the configuration of the third embodiment is the same as that of the first embodiment or the second embodiment, in which the energy analysis performed in the monitoring control system of each plant is performed on the network. The difference is that it is used at the Energy Analysis Center.

  That is, in this embodiment, measurement data measured at each plant 51, 52,..., 5n or data indicating the state of equipment, for example, data measured by a watt-hour meter and a flow meter in the first embodiment, The flow rate data measured in the second embodiment or the operation / stop signals of the main equipment and the valve opening / closing signals are collected by the data collection devices 6 of the plants 51, 52,. It transmits to the energy analysis center (energy analysis system) 61 via the network 60 in real time.

  The energy analysis center (energy analysis system) 61 receives measurement data transmitted from the plants 51, 52,..., 5 n via the network 60 or data indicating the state of the equipment and stores it in the database 7. Then, from the data stored in the database 7, the computer 8 calculates the energy intensity and power cost for each process of each plant 51, 52,. These calculation results are transmitted to each plant 51, 52,..., 5n in real time via a network 60 such as a public line. In the monitoring control device 5 of each plant 51, 52,..., 5n, the calculation result data sent from the energy analysis center (energy analysis system) 61 is displayed on the display unit in real time or as a report. Or output from a printer.

  With these configurations, the energy analysis that is necessary for each plant can be performed collectively in the energy analysis center (energy analysis system).

The block diagram which shows the structure of the 1st Embodiment of this invention. The figure which shows the process flow for demonstrating the flow volume calculation method of each process in the 2nd Embodiment of this invention. The table for demonstrating the rated power total value calculation method of each process in the 2nd Embodiment of this invention. The block diagram for demonstrating the method to calculate an operation rate from the signal which shows the state of the apparatus of each process in the 2nd Embodiment of this invention. The block diagram which shows the structure of the 3rd Embodiment of this invention. The table which shows the definition of the plant classified into a 1st type and a 2nd type. The block diagram which shows the structure of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electricity meter 2 ... Flow meter 10, 40 ... Monitoring control system 11, 41 ... Power generation equipment 12, 42 ... Power receiving equipment 13, 22, 43 ... First sedimentation basin (first sedimentation)
14, 23, 44 ... Aeration tank 15, 24, 45 ... Final sedimentation tank (final sedimentation)
16, 46 ... Concentrators 17, 47 ... Dehydrators 20, 50 ... Controller 3 ... Operating state of main equipment 4 ... Valve open / close state 5 ... Monitoring control device 6 ... Data collection device 7 ... Database 8 ... Computers 51, 52 ... 5n ... Plant 60 ... Network 61 ... Energy Analysis Center (Energy Analysis System)

Claims (6)

  An electric energy measuring means for measuring the electric energy, a flow measuring means for measuring the flow, and an electric energy measured by the electric energy measuring means and a flow measured by the flow measuring means. An energy management system comprising a basic unit calculating means for calculating a basic unit for each process.   A flow rate measuring means for measuring a flow rate at a predetermined location of the plant, a flow rate calculating means for calculating an inflow flow rate to each process of the plant using the flow rate measured by the flow rate measuring means, and an operation rate for each process of the plant A means for obtaining data, a power amount calculating means for calculating a power amount for each process from the data relating to the operation rate for each process obtained by this means and a rated power total value for each process, and a power amount calculating means An energy management system comprising: a calculated power amount for each process; and a basic unit calculating means for calculating a basic unit for each process from an inflow flow into each process calculated by the flow rate calculating means.   3. The energy management system according to claim 1, wherein the basic unit for each process calculated by the basic unit calculating unit and the power amount obtained by the power measuring unit or the power calculating unit are calculated. An energy management system comprising display means for displaying at least a basic unit for each of the electric power costs for each process.   3. The energy management system according to claim 1, wherein the basic unit for each process calculated by the basic unit calculating unit and the power amount obtained by the power measuring unit or the power calculating unit are calculated. An energy management system, comprising: a report creating means for outputting at least a basic unit for each of the power costs for each process as a report.   The energy management system according to claim 1 or 2, wherein the basic unit calculation means is provided in an external location connected to each plant through a network, and the calculation of the basic unit for each process of each plant is collectively performed. An energy management system characterized by what we do.   Receiving means for receiving measurement data necessary for calculating the basic unit for each process transmitted from each plant via the network or data indicating the state of the equipment, and the measurement data received by the receiving means or Using the data indicating the state of the equipment, the basic unit calculation means for calculating the basic unit for each process of each plant, and the basic unit for each process of each plant calculated by this means are connected to each plant via the network. An energy analysis system comprising: a transmission means for transmitting to the apparatus.

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