WO2011148647A1

WO2011148647A1 - Control management system for energy conversion device

Info

Publication number: WO2011148647A1
Application number: PCT/JP2011/002968
Authority: WO
Inventors: 実紀雄森光; 勝次武谷
Original assignee: パトックス．ジャパン株式会社
Priority date: 2010-05-28
Filing date: 2011-05-27
Publication date: 2011-12-01
Also published as: JP5811411B2; JPWO2011148647A1

Abstract

Disclosed is a control management device for improving energy conversion efficiency of an energy conversion device which converts energy states, comprising a general management device (1), a location control device (3) arranged at each business place, a device controller (4) connected to the location control device (3), and a device (5) the operation of which is controlled by the device controller (4). The location control device (3) selects a device control program most appropriate to a device to be controlled from among a plurality of device control programs stored in the location control device, and controls the operation of the device. The general management device (1) determines the presence/absence and type of a defect operation of the device (5) on the basis of an external environment condition value obtained from an external sensor (6) and an internal environment condition value obtained from an internal sensor (7), instructs correction measures, provides preventive maintenance data, and calculates and provides the energy saving effect of the operation.

Description

Control system for energy conversion equipment

The present invention relates to a control management system for an energy conversion device that controls the operation of an energy conversion device configured by a combination of a plurality of devices to be optimal, and remotely monitors and manages their state.

In the industrial field including factories equipped with production facilities and other business establishments, energy conservation measures are planned to reduce the amount of energy used above a certain level, and efforts are being made to achieve them. In order to achieve such energy saving, energy-related devices such as fuel cells, solar power generation equipment, cogeneration equipment, residential equipment, hybrid drive equipment, air conditioning equipment, water heaters, lighting, etc. In this field, various attempts have been made such as development of equipment with improved energy conversion efficiency and application of an optimal control method to individual equipment or group equipment groups used at the same place.

Furthermore, recently, an integrated energy supply system has been proposed for the purpose of optimizing the energy supply including the power source and further the maximum use efficiency of energy.

By the way, conventionally, as a method aiming at optimization control of the energy efficiency of various energy conversion devices, a method of applying a genetic algorithm based on historical data, a method of applying an optimization control theory to model control, a genetic Various methods such as a method of performing a simulation using an algorithm have been developed. However, the actual control method for optimizing the energy efficiency used is to control energy conversion devices such as water heaters alone, or at most similar equipment groups such as refrigerators and air conditioners for several convenience stores. It is limited to one that collectively controls a machine or that collectively controls a plurality of constituent groups included in a device that functions independently, for example, a gasoline engine, an electric motor, and a battery constituting a hybrid vehicle.

Also, there is a micro grid distribution system as another optimization method for energy efficiency. This is a method for controlling a small range of electricity, thermal energy supply, storage facilities, and groups of those consumers, but the control is complicated for a small scale, and it is a problem in terms of cost effectiveness. There are few practical examples.

On the other hand, there are many damages due to disasters such as fires, personal accidents, breakdowns, equipment shutdowns, etc. related to energy conversion equipment as described above, and maintenance inspection work to prevent them is also done by combining multiple equipment The complexity and high functionality of the device system is becoming complicated, and the increase of various costs greatly deteriorates the business environment.

In addition to the demand for the development of equipment and systems to prevent the occurrence of these disasters, personal accidents, and equipment failures, the so-called preventive maintenance (PM) that anticipates and takes precautions against these occurrences ) Is becoming increasingly important.

In addition, as a document disclosing the invention related to the optimization control method for the use energy efficiency, those described in Japanese Patent Application Laid-Open No. 2007-287063 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2009-281619 (Patent Document 2). is there.

JP 2007-287063 A JP 2009-281619 A

There are the following problems in the conventional control method for equipment that aims to save energy, which is the optimization of the energy efficiency used or proposed. That is, various proposed control methods aiming at energy saving remain in practical use in a limited field and range against the background of advanced theories, and have problems in cost effectiveness and versatility.

In other words, the method of applying optimal control theory to model control, the microgrid distribution method, etc. are complex in configuration and high in technology level, so it takes a lot of time and man-hours to develop for practical use, There are problems in terms of cost-effectiveness, and other methods such as simulation using a genetic algorithm have a narrow control range and few practical examples.

The above-described energy conversion device or device group control method is an immediate control method for almost energy saving, and the operation is maintained with the efficiency planned in advance for a certain period, or the device Monitor the external environmental condition values and internal environmental condition values, such as changes in temperature with the sun, detect abnormalities from the trend of the values obtained from this monitoring, determine the cause of failure, and take corrective action There is no control system that can provide data for preventive maintenance.

Also, there is no precedent for a management system that realizes energy saving and improvement of maintenance at an appropriate cost for a large capacity device already in operation.

Therefore, the present invention is practical and has little time and man-hours for development, exhibiting almost the same control effect as the optimal control method aiming at energy saving of energy conversion devices composed of a plurality of devices functioning alone or as a group. It was proposed for the purpose of providing a control management system that can put the control system into practical use and can be universalized.

Furthermore, it has been proposed for the purpose of providing a control management system that can be put to practical use and can be universally used in the energy converter that constitutes the integrated energy supply system.

More specifically, the present invention monitors and simulates external environmental condition values to be controlled by the energy conversion device, internal environmental condition values of the device that occur and change due to the operation of the energy conversion device. By doing so, the effect of energy saving operation is judged and the quality of the program applied to the control is evaluated, the best state is maintained, the presence or absence of abnormality is detected from the tendency of monitoring and judgment, and the cause of failure is determined. Provide a control management system for energy conversion equipment that can take corrective actions, provide data for preventive maintenance and energy-saving effects, and can be applied to existing equipment and systems at an appropriate cost This is a technical issue.

The present invention proposed to solve the technical problems as described above includes an integrated management apparatus installed in a management center, and a place control apparatus installed in each office connected to the integrated management apparatus via a communication line. And a plurality of device controllers connected to each location control device, and devices connected to and controlled by these device controllers.

The device controlled by the device controller is an energy conversion device that converts the state of energy, for example, a solar power generation device that converts light energy into electric energy, or the thermal energy of fuel as the thermal energy of electricity and hot water. Cogeneration equipment that converts energy into heat, air conditioning equipment that converts electric power into cold heat and fluid motion that carries it, lighting equipment that converts electricity into light energy, and other equipment that converts energy into various forms of energy The general term

The device controller described above is a control device for changing the start / stop of the energy conversion device controlled by the device controller and the operation effect thereof. For example, an inverter or an electromagnetic switch attached to an electric motor, a temperature controller for controlling the inverter, and an electromagnetic switch It is comprised by the combination with a programmable controller. These device controllers are further equipped with an external sensor for detecting an external environmental condition such as an indoor temperature where the energy conversion device is installed or controlled by the device, and an internal environment such as an output of the energy conversion device or a temperature rise. An internal sensor that detects the condition is connected.

Then, the device controller matches the control target value such as the room temperature commanded from the location control device with the detection value of the external sensor that detects the external environmental condition such as the room temperature connected to the device controller. A loop control operation, which is a kind of automatic control, is performed by opening / closing an electromagnetic switch of an air conditioner, which is an energy conversion device, or adjusting an air conditioning capability by changing the rotation speed of the air conditioner by an inverter.

In addition, the place control device is installed in a predetermined office, and the energy conversion device connected to the place control device via the device controller and the devices constituting the energy conversion device are in an optimum energy saving operation state or optimally. Operates to maintain near energy-saving operation.

The location control device stores a device control program prepared in advance for controlling an energy conversion device connected to the location control device via a device controller. This program is stored in a storage unit provided in the place control device.

The equipment control program stored in the place control device is the type, season, time operation pattern, equipment characteristics and rating, and intermittent operation that make up the energy conversion equipment installed in the office where this place control device is installed. And variable speed operation, combined operation of equipment, control conditions such as electricity charges, values of practical external environmental conditions, ranges of values of internal environmental conditions, control target values, and other conditions.

By the way, the types of equipment installed in a given office are limited, and other conditions are also limited, so there are relatively few equipment control programs based on historical data and empirical rules. Can be created with time and man-hours. However, when the coefficient in the device control program changes, it can be automatically created by a computer by preparing a coefficient table.

Also, a plurality of device control programs stored in the location control device can be obtained by comparing the operation result of the energy conversion device operated based on the device control program with the simulation result of the reference program stored in the integrated management device. The quality of the device control program stored in the place control device is maintained in the best state by evaluating the quality of the device and discarding or improving the defective device control program.

Furthermore, an outdoor sensor that detects the outdoor environmental conditions of the office where the energy conversion device is installed is connected to the place control device. Then, the location control device refers to the detection value of the outdoor sensor connected to the location control device, determines the energy conversion device to be controlled or the combination of devices constituting the energy conversion device, and sets the device for each device. A plurality of device control programs stored in the storage unit are selected based on detection values and control conditions of the external sensor and the internal sensor connected to the controller. Then, verification corresponding to the control target value is sequentially performed for each of the selected plurality of device control programs. For example, if the target of the selected device control program minimizes the energy cost, a simulation of energy cost calculation is performed, the device control program that obtained the result of the minimum energy cost is selected, and the selected device control program is It is downloaded to the device controller, the control target value based on the device control program is instructed to the device controller, and the device connected to the device controller is controlled.

When the condition for selecting the device control program to be downloaded to the device controller changes by a certain value or more, the place control device verifies the selected device control program according to the procedure described above and selects the device control program. Replace and maintain near optimal equipment control.

The integrated management device calculates and outputs the effect of energy saving operation based on the internal environmental condition value and the external environmental condition value input from the place control device, and controls the energy conversion device connected to the device controller. Evaluate and correct the qualities of the equipment, detect the occurrence of abnormalities in the energy conversion equipment, take corrective actions, monitor the operation of the energy conversion equipment over the long term, and perform preventive maintenance to prevent the occurrence of disasters, accidents, and failures, etc. Responsible for overall management.

This integrated management device is connected to the above-described location control device via a communication line, and a device control program, control target value, external environmental condition value, and internal environmental condition value applied to control the energy conversion device are predetermined. Input at each time, and first compare and diagnose these values at the initial diagnosis section. If the result is unacceptable, change the equipment control program and / or control target value applied to the control depending on the content. I do.

The initial diagnosis unit and re-diagnosis unit provided in the integrated management device have standards used for calculating the effect value of energy-saving operation and for evaluating the quality of the device control program used to control the energy conversion device. A program is stored, and a simulation for obtaining, for example, an energy amount is performed by combining the input external environmental condition value and the reference program, and the simulation value at this time and the input internal environmental condition value are included, for example The difference between the actual energy value and the energy saving effect value is recorded and output, and when the energy saving effect value does not satisfy the set limit range, the device control program applied to the control at this time Therefore, the equipment control program is improved or disposed of.

And the limit range of energy saving operation effect value is determined based on historical data and empirical rules, and is corrected by various numerical values accumulated in the recording unit inside the integrated management device.

The reference program stored in the integrated management device is a program that does not include control conditions for energy-saving operation prior to the improvement of the device control program, and is an energy conversion connected to an existing device controller. When evaluating the qualities of the equipment control program applied to equipment, the equipment control program applied to the operation of existing energy conversion equipment becomes the reference program, and the equipment configuration and combination are changed to the equipment controller. In evaluating the qualities of the equipment control program applied to the connected energy conversion equipment, the energy conversion equipment newly connected to the equipment controller is controlled by standard control and the control conditions for energy saving operation are set. The device control program not included is set as the reference program.

The qualification of the equipment control program applied to the control of the energy conversion equipment by the integrated management device and the effect value of the energy saving operation are re-diagnosed in the same procedure after the time when the result of the improvement measures is expected. If it is ineligible, it is judged as abnormal and repairs will be conducted after a field survey.

By the way, for the failure diagnosis of the energy conversion device connected to the device controller, necessary data among the data input from the location control device to the initial diagnosis unit and rediagnosis unit of the integrated management device via the communication line, for example, A combination of values that have a correlation between the temperature of the external environmental condition values and the energy amount of the internal environmental condition values, and a value that is predicted to change over time, such as the ground leakage current value of the internal environmental condition values, is long. Record and store it over a period of time and investigate its changes. For example, when the energy conversion device is an air conditioner, if the change in the internal environmental condition value is significant with respect to the change in the external environmental condition value such as the outside air temperature input and recorded in the initial diagnosis unit and the rediagnosis unit, the cause Changes in customer requirements such as changes in facility usage to which air-conditioning equipment is applied, and customers manually change the air-conditioning temperature. And if the device itself is one of the causes of sudden changes in the internal environmental condition values, the overcurrent detection sensor, leakage detection sensor, temperature detection sensor, etc. installed in the device controller will operate to stop the device. Let

The internal environmental condition values recorded and stored in the initial diagnosis unit and the rediagnosis unit, for example, when the change is gradual, for example, equipment wear and insulation deterioration are advancing. There is a possibility, so that it will be repaired in advance, so-called preventive maintenance data.

The above is the diagnosis from the data value input and stored in the initial diagnosis unit and the re-diagnosis unit of the integrated management apparatus. In addition, in the diagnosis of the present invention, for each device control program, for each normal and abnormal type The simulation of the change in the external environmental condition value and the change in the internal environmental condition value is performed, the change tendency is stored as data, and the simulation data value is compared with the detected data value such as the internal environmental external condition value. Therefore, the type of abnormality can be estimated.

As described above, according to the present invention, the device control program that can be created in a relatively small amount of time and man-hours enables the control of the energy conversion device in a control state close to the optimum state, and the provision of energy saving data becomes possible. The energy saving effect vs. required cost can be improved over a wide range, even to small-scale customers.

In addition, by detecting the presence or absence of an abnormality in the same equipment, determining the cause of failure, taking corrective action, and performing accurate preventive maintenance based on the data, reliability is improved, and there is a safe and few failure state. The maintenance cost can be reduced as well as various damage costs and energy costs caused by the outage due to the failure. As a result of reducing the amount of energy required, carbon dioxide gas emissions can also be reduced.

Furthermore, the present invention can be easily applied to a system including an existing energy conversion device at an appropriate cost.

Furthermore, the present invention can be applied to a control management system that realizes optimum energy-saving control in an energy converter that constitutes an integrated energy supply system.

It is a block diagram which shows one Embodiment of the control management system of the energy conversion apparatus with which this invention was applied. It is a functional block diagram which shows one Embodiment of the place control apparatus which comprises the control management system which concerns on this invention. It is a functional block diagram which shows one Embodiment of the integrated management apparatus which comprises the control management system which concerns on this invention. It is a block diagram which shows embodiment which applied the control management system which concerns on this invention to medium-sized hospital.

Hereinafter, an embodiment of a control management system for an energy conversion device to which the present invention is applied will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a control management system for energy conversion equipment to which the present invention is applied. In this control management system, an integrated management device 1 is installed in a management center or the like. 1 is connected to a location control device 3 via a communication line 8 such as the Internet. The place control device 3 is installed in, for example, a predetermined plurality of business establishments 2. A plurality of device controllers 4 are connected to these place control devices 3, and devices 5 are connected to each device controller 4.

The device controller 4 is connected to an external sensor 6 that detects the external environmental conditions such as the temperature, humidity, and luminous intensity of the room that is air-conditioned by the device 5. The indoor external environment detected by the external sensor 6 is connected to the device controller 4. A condition value is entered.

In addition, an outdoor sensor 63 for detecting an outdoor environmental condition of the business place 2 where the place control device 1 is installed is provided, and the outdoor control device 3 detects the outdoor environmental condition value detected by the outdoor sensor 63. To enter.

Furthermore, an internal sensor 7 is connected to the device controller 4. The inner sensor 7 determines the internal conditions such as power consumption, generated power, current, device temperature, rotation speed, flow rate, and luminous flux generated by the operation of the device 5 in the device 5 or in the vicinity thereof or in the device controller 4. The measured value is input to the device controller 4 as an internal environmental condition value.

In the present embodiment, the device 5 connected to the device controller 4 and controlled by the device controller 4 is a device that performs energy conversion. For example, in a cooling / heating device, it is driven by an electric motor or a prime mover that inputs electric power or fuel. Compressors, blowers and pumps for transporting hot and cold air and hot and cold water, etc., and changes in external environmental conditions such as temperature and humidity caused by these operations are detected by the external sensor 6, and power, demand power, equipment Changes in internal conditions such as temperature, rotation speed, flow rate, and the like generated by operation of the device 5 are detected by the internal sensor 7. Data detected by the inner sensor 6 and the outer sensor 7 is input to the device controller 4.

When the devices 5 such as the compressor, the fan and the pump are driven by the electric motor, a variable speed device such as an inverter for changing the rotation speed attached to the electric motor in order to change the operation effect thereof is an equipment controller. 4 is treated as a part.

For example, in a device driven by an electric motor, the device controller 4 is configured by a combination of an electromagnetic switch that opens and connects a load such as an inverter or an electric motor to a power source, and a programmable controller and various regulators that control the electromagnetic switch. The control target value of the equipment controller 4 such as the room temperature, for example, which is instructed from the place control apparatus 3 according to the equipment control program downloaded from the place control apparatus 3, and the external environment such as the room temperature detected by the external sensor 6 Loop control, which is a kind of so-called automatic control, is performed by comparing the condition value and changing the number of revolutions of the device so as to reduce this difference, or instructing start and stop.

The automatic control operation described above is executed in accordance with a device control program downloaded from the location control device 3 and a control target value (hereinafter simply referred to as a control target value) of the device controller 4 instructed from the location control device 3. Is done.

Further, the device controller 4 uses the internal environmental condition value detected by the inner sensor 7 such as a temperature rise generated by the operation of the device 5 as a control condition. For example, when the temperature rise value or the leakage current value exceeds a limit value, Control for preventing failure of the device 5 is also performed by instructing the device 5 to decelerate or stop.

Further, the device controller 4 sends the condition value commanded from the location control device 3 to the location control device 3 among the external environment condition value detected by the external sensor 6 and the internal environmental condition value detected by the internal sensor 7. Send.

The location control device 3 functions to optimally maintain the control state of all the devices 5 connected to the location control device 3 via the device controller 4 and the combination of elements constituting the device 5. . Inside the location control device 3, a device 5 to be controlled and a leakage of its electric line, a leakage detection sensor for detecting an insulation failure, and a demand meter for detecting the overall demand power are installed as an internal sensor 73. There is also. Based on the data detected by these sensors 73, fire and electric shock due to insulation failure are prevented, and control for preventing the addition of electricity charges due to excess of demand power is also performed. The leakage detection sensor may be installed in the device controller 4 as a part of the internal sensor.

The location control device 3 used in the present embodiment is represented by the functional block diagram shown in FIG. 2, and is connected to the integrated management device 1 via a communication line 8 such as the Internet as shown in FIG. A network is formed with the equipment controller 4 in the installed office 2 by a LAN, an optical cable or the like.

As shown in FIG. 2, the location control device 3 includes a control condition storage unit 31, an environmental condition storage unit 32, a control program storage unit 33, a control program selection unit 34, a simulation unit 35, and a selection program storage. Unit 36 and a control target value storage unit 37.

The control condition storage unit 31 provided in the place control device 3 includes, for example, characteristics of the equipment controlled by the equipment controller 4, characteristics such as efficiency, temperature and power limits and ranges of each part, energy consumption, energy price, day of the week Items to be considered when performing optimal control, such as the relationship with the season and time zone, are stored, and the values of these items are input as control condition values to the device control program and simulated in the integrated management apparatus 1 as described later. It is used as an input value when performing

Further, the environmental condition storage unit 32 stores the external environmental condition value and the internal condition value acquired from the device controller 4 and the place control device 3.

Furthermore, the control program storage unit 33 stores the type of equipment in the office, season, time, operation pattern, characteristics and rating of the equipment, intermittent operation, variable speed operation, combination operation of equipment, control conditions such as electricity charges, practical use, etc. All equipment installed in the office including the equipment 5 installed in the office 2 or a combination of assumed equipment by combining various conditions such as the range of the external condition value, the range of the internal condition value, the control target value, etc. A plurality of device control programs that can be applied to the control are stored and stored.

The device control program stored in the control program storage unit 33 is evaluated by the integrated management device 1 as a device control program, and is improved or discarded based on the evaluation result. The qualities are maintained in the best condition.

Furthermore, the control program selection unit 34 first selects a control target based on the outdoor external environmental conditions detected by the outdoor sensor 63 connected to the location control device 3 and the control conditions stored in the control condition storage unit 31. Next, for each single device or a combination of a plurality of devices constituting the energy conversion device, the control conditions for controlling those devices and the device controller 4 for controlling those devices are determined. Several device control programs are selected from the device control programs stored in the control program storage unit 33 based on the external environmental condition values detected by the connected external sensor 6.

Then, the simulation unit 35 sets the current external environmental condition value detected by the external sensor 6 in the case of aiming at the minimum energy cost, for example, for each of a plurality of selected device control programs. Referring to the current internal environmental condition value detected by the sensor 7, a so-called simulation is performed to calculate the energy cost when the device controller 4 is operated by changing the control target value of the device controller 4 within the practical range according to the device control program Then, the device control program that obtained the result of the minimum energy cost is stored as a selection program in the selection program storage unit 36, and the control target value instructed to the selection program at that time is stored in the control target value storage unit 37.

Next, the selection program stored in the selection program storage unit 36 is downloaded to the corresponding device controller 4, and the corresponding control target value stored in the control target value storage unit 37 is instructed to the device controller 4. Control the equipment.

If the condition for selecting the device control program stored in the control program storage unit 33 changes by a certain value or more, the selection program is replaced in the same procedure, and the control target value paired with the selected program is stored in the device controller 4. It is instructed and the control state close to the optimum can be maintained.

Next, as shown in FIGS. 1 and 3, the integrated management apparatus 1 to which the place control apparatus 3 is connected via the communication line 8 selects and controls the selection program applied to the device control from the place control apparatus 3. Various values calculated by applying the simulation together with the target value, the external environmental condition value, and the internal environmental condition value are input at certain times or in response to a call. These values are first compared and diagnosed by the initial diagnosis unit 11 shown in FIG.

For example, the energy conversion device is an air conditioner, and the input to the device of the internal environmental condition value usually changes almost linearly with respect to the linear change of the external environmental condition value such as the outside air temperature. Causes when the relationship is broken include changes in customer requirements such as changing the facility usage and changing the air conditioning temperature manually by the customer. The failure of the device itself, which is one of the causes of a sudden increase in input, is detected by an overcurrent detection sensor, a leakage detection sensor, a temperature detection sensor, etc. installed in the device controller 4. That is, a failure of the device itself is detected as a change in current supplied to the device, a change in voltage, or a change in temperature. When the detected value detected by each sensor exceeds a preset value, the device controller 4 determines that the device has failed and stops the operation of the device.

Then, if the result of the diagnosis in the initial diagnosis unit 11 is ineligible, the above data is sent to the improvement countermeasure unit 12.

In addition, the initial diagnosis unit 11 and the rediagnosis unit 13 store a reference program used for calculating the effect value of energy saving operation and for evaluating the program quality. In combination with the reference program stored here, for example, a simulation for obtaining the amount of energy is performed, and the difference between the simulation value at this time and the measured value of the amount of energy included in the input internal environmental condition value is, for example, The energy saving operation effect value is recorded and output by the

recording units

14 and 15, and when the energy saving operation effect value does not satisfy the set limit range, the device control program applied to the control at this time The place control device 3 is instructed to improve or dispose of the equipment control program by judging that the qualities are inadequate.

The above-mentioned limit range of the energy saving operation effect value is determined based on history data and empirical rules, and is corrected by various values accumulated in the

recording units

14 and 15.

The reference program stored in the initial diagnosis unit 11 and the rediagnosis unit 13 corresponds to the control state before the improvement by the control management system of the energy conversion device, and includes control conditions for energy saving operation. When a control management system according to the present invention is applied to an energy conversion device composed of an existing device or a combination of devices, the existing device control program becomes the reference program and a new device is selected. However, when a new energy conversion device is configured by a combination of new devices, a device control program that does not include control conditions for energy saving operation is set as a reference program.

The improvement countermeasure unit 12 provided in the integrated management apparatus 1 compares the above data with the same items in time series or with each other, and for each device control program, the external environmental condition value for each normal type and each type of abnormality. The simulation of the change in the internal environment and the change in the internal environmental condition value is performed, the change tendency is stored as data, and the simulation data value is compared with the detected data value such as the external environmental condition value and the internal environmental condition value. To estimate the type of abnormality.

Depending on the type of abnormality, corrective measures are taken, such as checking the corresponding equipment, or instructing the place control device 3 to replace the selection program and / or the control target value.

後 After the time when the result of the improvement measure is expected, the same diagnostic procedure is performed by the re-diagnosis unit 13, and if the result is inadequate, it is determined that there is an abnormality and repair is made after on-site investigation.

For failure diagnosis of the device 5, there is a correlation between necessary data among the data input to the initial diagnosis unit 11 and the rediagnosis unit 13, for example, the temperature of the external environmental condition value and the energy amount of the internal environmental condition value. Values that are expected to change over time, such as a combination of certain values or ground leakage current values among internal environmental condition values, are stored in the

recording units

14 and 15 for a long period of time, and the change state is analyzed and analyzed by the analysis unit 16. . For example, when the amount of energy in the internal environmental condition value increases, one of the causes is wear and deterioration of the device 5, and if left untreated, a failure occurs. Also, when the output remains unchanged, the increase in input is an increase in loss, and the loss generates heat, causing a fire. Therefore, preventive maintenance measures are implemented after investigation. An increase in leakage current means deterioration of the insulation of the equipment, and if left unattended, it may cause a fire due to poor insulation or an electric shock accident, so preventive maintenance measures are necessary. In addition, changes in energy purchase costs and fuel amount are also necessary for detecting abnormalities in terms of fuel efficiency and efficiency.

In addition, the method for determining the necessity of preventive maintenance is a method of comparing the cumulative operation time with the average time between failures (MTBF) obtained from the operation results of the equipment, engineering numerical values, for example, the life of an insulator is a temperature of 8 There are a method of referring to halving each time the temperature rises, or a method of judging an aging state of a certain numerical value from an empirical rule.

The analysis unit 16 analyzes these recorded values in the long term and outputs them as preventive maintenance data.

Hereinafter, a specific example to which the control management system of the energy conversion device according to the present invention is applied will be described.

FIG. 4 is a block diagram showing an example in which the control management system according to the present invention is applied to a medium-sized hospital. In this example, the control management system is located about 70 km away from the hospital management room where the place control device 3 is installed. There is a certain management center, and a communication line 8 is connected to the integrated management apparatus 1 installed in this management center.
The location control device 3 is connected via

And, 8 types of device controllers 40 to 47 are connected to the

location control device

3, and 8 types of devices 50 to 57 are connected to each of the device controllers 40 to 47, respectively. In addition, the location control device 3 is provided with an outside sensor 63 for detecting the outside air temperature, and a ground leakage current detection sensor that flows through the insulation resistance of the equipment and the electric line and the power consumption for every 30 minutes in the entire hospital. An inner sensor 73 composed of a demand power sensor indicating the maximum value of is connected.

The device 50 constituting the energy conversion device is a photovoltaic power generation panel, and is automatically controlled by the device controller 40 so as to generate power at the highest efficiency during the day. Therefore, the device control program of the device controller 40 is unnecessary, and the generated power amount detected by the internal sensor is transmitted to the place control device 3.

The other device 51 constituting the energy conversion device is a generator, the other device 52 is a water heater, and these devices 51 and 52 are cogeneration devices that use a common gas engine as an energy source. Operate three devices with the same specifications at the same location, and adjust the number of units to be used for stepwise output control, and use a governor for continuous output control. Control automatically.

The device 52, which is a cogeneration device, further includes a heat pump water heater, a hot water tank, and an inverter-controlled hot water circulation pump that are used in an auxiliary manner, and is controlled as a combination (group) of these various devices. In addition, a heat pump type water heater may be provided as an accessory of the device 52 that is a water heater.

The device 53 is an air conditioning compressor, and the air conditioning pump of the device 54 and the fan transport and circulate the air or water heated and cooled by the air conditioning compressor 53 to a destination location. Both the compressor and the air conditioner control the capacity by inverter control.

In this example, since five air conditioners are distributed in each room, the room temperature in the external environmental conditions of each room is controlled according to the commanded temperature. The inner sensor 73 is a demand power sensor or a leakage current sensor.

Furthermore, the devices 55 are lighting, and are installed in a plurality of places in the hospital. The devices 55 are turned on and off, and the voltage is reduced by 5% depending on the conditions such as location, purpose, time, and near the window.

Furthermore, the device 56 is a facility device such as an electric heater or a compressor, and appropriate control is performed on a device that is advantageous in terms of effect and cost.

Furthermore, the device 57 is a power receiving facility from an electric power company, and sets an electricity charge according to the amount of power passing through, demand power, power factor, these time zones, and seasons. In particular, when an excess of demand power is predicted, control for suppressing this is performed.

In this example, control is aimed at minimizing the electricity bill paid to the power company. As a control condition for this purpose, in addition to the control according to each of the devices 50 to 57 described above, the following control can be cited.

A. Since the late night charge from 22:00 to 8:00 the next morning is cheap, the gas engine of the cogeneration equipment of the equipment 51 and equipment 52 is not operated.

B. When a heat pump water heater is installed as an accessory of the device 52, it is operated until the hot water tank is full only at midnight as much as possible, and the hot water tank is emptied as much as possible before midnight.

C. When the demand power is likely to be exceeded, the air conditioning pump fan 54 continues operation, and only the air conditioning compressor 53 is stopped for about 10 minutes.

D. Lights are turned on according to time and place. When illuminance is not required, such as at midnight, the voltage is reduced by 5%.

E. The temperature control is performed with a time difference stepwise than the PID control. Consider the thermal characteristics of the room.

As described above, the device control program to be prepared is the one in which the external environmental conditions, the internal conditions, and the control conditions for energy-saving operation are added in order of time so as to be applied to the entire device to be controlled and related operations. A device control program is created. The simulation is carried out with reference to the characteristic values of the respective devices 50 to 57. However, if the scale is at this level, there will be no great difference in the results even if the simulation frequency is reduced.

Further, these device control programs are evaluated by the integrated management apparatus 1 for the qualities as the device control programs, and as a result, the qualities as the device control programs are maintained in the best condition such as being improved or discarded. Yes.

Thereafter, by controlling the devices 50 to 57 according to the procedure described with reference to FIG. 2 described above, the control of the entire devices 50 to 57 to save energy and minimize the electricity bill is achieved.

By the way, failure diagnosis performed based on various environmental condition data focuses on cogeneration equipment and air conditioning equipment, and compares the cumulative operation time with the mean time between failures (MTBF) obtained from the operation results of the equipment. Preventive maintenance is performed on all devices, such as analyzing changes in efficiency and environmental conditions.

As described above, the control management system according to the present invention is useful for every business place where equipment for converting energy into other energy such as heat and power is installed. Furthermore, the present invention can be applied to an energy-saving optimal control method in an energy converter constituting the integrated energy supply system, and can contribute to the realization of the integrated energy supply system.

1 Integrated management device, 2 offices, 3 location control devices, 4 device controllers, 5 devices, 6 external sensors, 7 internal sensors, 8 communication lines, 11 initial diagnosis unit, 12 improvement measures unit, 13 rediagnosis unit, 14 records Unit, 15 recording unit, 16 analysis unit, 31 control condition storage unit, 32 environmental condition storage unit, 33 control program storage unit, 34 control program selection unit, 35 simulation unit, 36 selection program storage unit, 37 control target value storage unit , 40-47 equipment controller, 50-57 equipment, 63 outdoor sensor, 73 internal sensor

Claims

An equipment controller for controlling the operation of the energy conversion equipment that converts the state of energy;
An external sensor for detecting an external environmental condition value controlled by operation of the energy conversion device;
An internal sensor that detects an internal environmental condition value of the device that changes due to the operation of the energy conversion device; and
A plurality of the device controllers are connected, and a location control device that stores a plurality of device control programs respectively applied to the plurality of device controllers in a storage unit;
The location control device comprises an integrated management device connected to be communicable via a communication line,
The location control device transmits the external environmental condition value detected by the external sensor and the internal environmental condition value of the device detected by the internal sensor to the integrated management device,
The integrated management device compares the external environmental condition value and the internal environmental condition value transmitted from the location control device with their values and correlations, including time-series elements, with normal state values, and diagnosis. The presence / absence of the failure and the type of the failure are determined, and when the failure is determined, the corrective action for the failure is instructed and transmitted to the reference program which is a device control program that does not include control conditions for energy saving operation. Performing the simulation of the operation of the energy conversion device by applying the external environmental condition value, and evaluating the quality of the device control program applied to the operation of the energy conversion device and stored in the location control device; and Output energy saving operation effect value,
Further, the integrated management apparatus selects a necessary value from the external environmental condition value and the internal environmental condition value transmitted from the location control apparatus, stores the period necessary for long-term diagnosis, and stores these values. A long-term diagnosis is performed based on the measured value, and repair and / or preventive maintenance work of the energy conversion device is performed based on the result of the long-term diagnosis and a value stored for a necessary period. Control management system.
The location control device is a device control program that does not include control conditions for energy-saving operation stored in the integrated management device. Select a plurality of device control programs that match the device controller, apply the external environmental condition value to each selected device control program, perform a simulation to calculate the control target value, and obtain the best simulation result The obtained device control program is downloaded to the device controller as a selection program, and the device controller controls the energy conversion device according to the selection program.
The integrated management device is configured to indicate a predicted value of the external environmental condition value and the internal environmental condition value at a normal time, and a change state of each value at the time of a defective problem predicted by a simulation. 2. The control management system for an energy conversion device according to claim 1, wherein the type of failure is determined by comparing the measured value and the value at the time of failure obtained by simulation.
The integrated management device obtains a target value for control by combining an external environmental condition value transmitted and input from the location control device and a reference program that is a program not including a control condition for energy saving operation. The difference between the simulation value obtained by performing the simulation and the actual measurement value that is the target of control included in the internal condition value transmitted from the location control device is output as an effect value of the energy saving operation, and the energy saving operation is performed. If the effect value does not satisfy the limit range set based on the stored data, history data and empirical rules acquired in advance, it is determined that the quality of the program applied to the control of the energy conversion device is ineligible. The program according to claim 1, wherein the program applied to the control is corrected or discarded. Control management system of the Energy conversion devices.
When applying the energy converter to an existing facility, a reference program that is a device control program that does not include a control condition for energy saving operation is a device control program that has already been applied to the existing facility. The control management system for an energy conversion device according to claim 1.
6. The energy conversion device control management system according to claim 1, wherein the energy conversion device is configured by a combination of a plurality of devices.
An energy conversion device or an energy conversion device to be controlled with reference to a detection value of the outdoor sensor connected to an outdoor sensor for detecting an outdoor environmental condition of an establishment where the energy conversion device is installed in the place control device The control management system for an energy conversion device according to any one of claims 1 to 5, characterized in that a combination of devices constituting the power source is selected.
The device controller is provided with at least one of an overcurrent detection sensor, a leakage detection sensor, and a temperature detection sensor, and is connected to the device controller when a value detected by the sensor exceeds a predetermined value. 6. The control management system for an energy conversion device according to claim 1, wherein the energy conversion device is determined to have a failure and the operation of the energy conversion device is stopped.