JP6563257B2 - Monitoring control device, monitoring control method and program - Google Patents

Description

  Embodiments described herein relate generally to a supervisory control device, a supervisory control method, and a program for performing load control during a commercial power failure.

  Buildings of a certain size such as buildings and plants are equipped with a large number of electrical facilities that become power loads, and as a power source there are installed substation facilities for commercial power and power generation facilities used during commercial power outages. . The power generation facility includes an emergency generator that generates power using fuel. A monitoring control device is applied to these facilities in order to perform monitoring control of the facilities.

  In addition to general loads such as lighting and air conditioning, power loads installed in buildings include emergency loads used during commercial power outages. Emergency loads include fire-fighting equipment that contributes to fire-fighting activities and disaster prevention equipment that is used when evacuating from buildings. Examples of the former include a fire hydrant, a sprinkler, and a firefighting exhaust system, and examples of the latter include emergency lighting and a smoke exhauster.

Since these emergency loads need to maintain their functions in the event of a commercial power outage, the emergency power and standby power that serve as the power to the emergency load are regulated by laws and the like.
(1) The emergency power source is a power source for maintaining the function of the fire fighting equipment. According to the Fire Service Law, the emergency power supply law stipulates that it can be operated continuously for 60 minutes or more at the rated load, that the fuel oil has a capacity of 2 hours or more, and that the voltage is established within 40 seconds.
(2) The standby power source is a power source for maintaining the function of the disaster prevention facility. According to the Building Standards Act, the standby power supply is required by the Building Standards Act to be able to supply power for 30 minutes or longer, to have a capacity capable of continuous operation for 30 minutes or more, and to establish a voltage within 40 seconds.

  An emergency generator included in a power generation facility is used as the emergency power source or the standby power source. The capacity of the emergency generator is usually set with a margin with respect to the amount of emergency load. For this reason, an emergency generator not only supplies power to an emergency load during a commercial power outage, but also supplies excess capacity to a load other than an emergency load, that is, a general load or a safety load within a range not exceeding the power generation capacity. Often supplied. The security load is a load that contributes to business continuity and security of electrical equipment.

  When operating such an emergency generator, it must be avoided that the supply of power to the emergency load is stopped by supplying power to the general load or the safety load exceeding the power generation capacity of the generator. . It is also desirable to make maximum use of the power generated by the generator. For this reason, a monitoring control technique has been proposed in which on / off control is performed for general loads other than emergency loads and the emergency generator is efficiently operated in the event of a commercial power failure.

JP 2009-1976896 A

  In an emergency generator, power is generated by burning fuel, and a characteristic curve unique to each generator appears in the relationship between the fuel consumption and the generated power of the generator. In other words, the emergency generator consumes fuel according to the characteristic curve unique to the generator, and the time until the remaining amount of fuel runs out is determined by the rating of the generator and the remaining amount of fuel.

  Therefore, if the fuel is replenished, the generator operation continuation time will be extended by that amount, but if the refueling is cut off due to the occurrence of a major earthquake, etc., power generation will occur when the remaining amount of fuel is exhausted. The machine must also stop driving. For this reason, when commercial power recovery and fuel supply to the generator cannot be expected due to the effects of a disaster, how to extend the generator operation continuation time with only limited fuel is monitored. This is an important issue in control technology.

  Recently, the capacity of emergency generators has been increasing from the viewpoint of disaster prevention, and the amount of power supplied to security loads and general loads during commercial power outages tends to increase. Accordingly, there is a strong demand for extending the generator operation continuation time in a situation where there is a restriction on the remaining amount of fuel such as when a disaster occurs. As described above, since conventional on / off control is performed for general loads other than emergency loads, the load amount is suppressed and fuel is reduced by using such conventional technology. Can be reduced.

  However, in actual operation, the load amount that is expected to be used generally changes for each time zone. Therefore, regardless of the time zone, if the power supplied to the load is suppressed at a certain rate, a time zone where the power suppression amount is large and a time zone where the power suppression is small with respect to demand occurs. In particular, the general load has a large variation in load due to a deviation in load utilization time such as day and night, or weather and temperature. As a result, in an emergency generator that supplies power to a general load at the time of a commercial power outage, the balance between the amount of power suppression and demand is likely to be lost, and it is difficult to efficiently extend the operation continuation time of the generator according to actual demand. It was.

  The embodiment of the present invention has been proposed to solve the above-described problem, and by optimizing the power suppression amount and the operation continuation time by predicting the load amount and obtaining the power suppression amount to the load. It is an object of the present invention to provide a monitoring control device, a monitoring control method, and a program that maximize the length of the program.

In order to achieve the above object, the monitoring control device according to the present embodiment includes the following components (1) to (7).
(1) A remaining amount measuring unit that measures the remaining amount of fuel of the generator.
(2) A predicted value calculation unit that calculates a predicted value of the power load per unit time.
(3) A consumption calculation unit that calculates the fuel consumption of the generator corresponding to the predicted value based on a characteristic curve given in advance.
(4) A time calculation unit that integrates the consumption of the fuel per unit time and calculates the operation continuation time of the generator from the remaining amount of the fuel.
(5) A target time setting unit for setting a target time for continuing the operation of the generator.
(6) A suppression target value calculation unit that calculates a suppression target value of the power load per unit time based on a ratio between the target time and the operation continuation possible time.
(7) A load control unit that performs on / off control of the power load so as to satisfy the calculated suppression target value.
The embodiment of the present invention also includes aspects of a monitoring control method and a program.

The block diagram of 1st Embodiment. The block diagram containing the block diagram of each component of 1st Embodiment. The graph which shows the characteristic curve of the output of a power generation equipment, combustion consumption, and a consumption rate. The flowchart of 1st Embodiment. The graph which shows an example of the load prediction for every unit time. The graph which shows an example of the load predicted value for every unit time at the time of applying 1st Embodiment, and a suppression target value. The flowchart of 2nd Embodiment. The graph which shows an example of the load predicted value for every unit time at the time of applying 2nd Embodiment, and a suppression target value. The graph which shows an example of the load predicted value for every unit time at the time of applying 3rd Embodiment, and a suppression target value. The flowchart of 3rd Embodiment.

  Hereinafter, a monitoring control apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings. The monitoring and control apparatus according to the following embodiment is applied to a building of a certain scale in which an electrical facility including an emergency load and a general load and a power source facility thereof are installed.

(1) First embodiment (configuration)
FIG. 1 is a block diagram showing the entirety of the first embodiment, and FIG. 2 is a block diagram including a block diagram of each component of the first embodiment. The monitoring and control apparatus according to the first embodiment performs monitoring and control of a commercial power receiving / transforming facility 6, a power generation facility 7 including an emergency generator, an emergency load 8, and a safety / general load 9 (shown in FIG. 1). .

  The power generation facility 7 has a capacity that can cover both the emergency load 8 and the safety / general load 9, that is, the entire power load. However, the capacity of the power generation equipment 7 is not limited to this. The emergency load 8 is a load including fire fighting equipment and disaster prevention equipment, and the security / general load 9 is a load including both the safety load and the general load. In the example illustrated in FIG. 1, one each of the power receiving / transforming equipment 6, the power generation equipment 7, the emergency load 8, and the security / general load 9 are illustrated, but a plurality of them may be provided.

  In the present embodiment, at the time of a commercial power failure, the safety / general load 9 is controlled to suppress the load using three control modes. The three control modes are (A) the rated operation control mode, (B) the operation time control mode in which the load suppression value is fixed, and (C) the operation time control mode in which the load suppression value is changed according to the predicted value. It is. The rated operation control mode of (A) is controlled by the rated operation control unit 22, and the operation time control mode of (B) and (C) is controlled by the operation time control unit 23. This will be described in detail later.

(A) In the rated operation control mode, load control is performed so that the rated capacity of the power generation facility 7 is output, and general self-load control is performed.
(B) In the operation time control mode in which the load suppression value is fixed, the safety / general load 9 is prioritized in advance in consideration of the importance and the load control is performed according to this order, and a predetermined load suppression value is set. While ensuring, the operation of the power generation equipment 7 is continued until the set target time.

(C) In the operation time control mode in which the load suppression value is changed according to the predicted value, load prediction is performed, and the load control of the safety / general load 9 is performed while changing the load suppression value based on the predicted value. The operation of the power generation equipment 7 is continued until the set target time. As for the target time, for example, the target time is set in units of 30 minutes by dividing 48 days.

  As shown in FIG. 1, the supervisory control device is provided with a supervisory control network 1 using TCP / IP or the like. The supervisory control network 1 is laid in a building to which the supervisory control device is applied. A supervisory control master station 2, supervisory control slave stations 3, 4 and a supervisory control terminal 5 are connected to the supervisory control network 1.

  The monitoring control terminal 5 is a terminal for inputting various control settings such as display of control states of various facilities and target time. The supervisory control master station 2 performs various calculations such as calculation of the predicted load value and the operation continuation possible time of the power generation equipment 7, and generates a control command for the security / general load 9. The supervisory control master station 2 receives weather data and weather forecast data via the Internet or the like in order to obtain a predicted load value.

  The monitoring control slave station 3 is connected with a receiving / transforming facility 6 for commercial power and a power generation facility 7 for generating power during a commercial power failure. The supervisory control slave station 3 takes in the power failure state signal input from the power receiving / transforming facility 6, the generated power signal input from the power generation facility 7 and the remaining fuel signal input, and monitors and controls these facilities 6, 7. Among these signals, the power failure state signal is a signal for notifying a power failure or power recovery. The generated power signal is a signal for notifying the measured value of the generated power of the power generation facility 7. The remaining fuel signal is a signal for notifying the remaining amount of fuel in the power generation facility 7.

  An emergency load 8 and a safety / general load 9 are connected to the supervisory control slave station 4 as power loads. The supervisory control slave station 4 outputs an on / off control signal for controlling on / off of the safety / general load 9 and an on state for notifying whether the emergency load 8 and the safety / general load 9 are on / off. The input of a signal is taken in, and these loads 8 and 9 are monitored and controlled.

  Each of the above signals is exchanged between the facilities to be monitored and controlled by the monitoring and control slave stations 3 and 4, contacts and analog, communication by various transmissions, and the like. In addition, the above signals are also exchanged with the supervisory control master station 2 and the supervisory control terminal 5 via the supervisory control network 1.

  The safety / general load 9 can be controlled by an on / off control signal, and the priority order thereof, that is, the order of which power load among the security / general loads 9 is cut first and which is left is arbitrary. Can be set. The priority order when performing the start / stop control of the security / general load 9 is set by the monitoring control terminal 5. Further, prioritizing the security / general load 9 can be performed in any of the above three control modes.

  The emergency load 8 needs to maintain its function at the time of a commercial power outage and is subject to regulations such as laws. Therefore, only the safety / general load 9 is basically controlled to start and stop. However, if an emergency situation such as the occurrence of an earthquake occurs, the use area of the building is restricted, etc., and an emergency load 8 is included in an area that is not used. 8 may be controlled to start and stop.

  Next, functions of the monitoring control master station 2, the monitoring control slave stations 3, 4 and the monitoring control terminal 5 will be described with reference to FIG. These functions may be realized by a computer.

[Supervisory control master station]
As shown in FIG. 2, the monitoring control master station 2 is provided with a communication processing unit 21 for communicating signals with the monitoring control network 1, two control units, and five arithmetic units. The two control units are a rated operation control unit 22 and an operation time control unit 23.

  Among them, the rated operation control unit 22 controls the on / off control of the safety / general load 9 and, in general, the self-generated load so as to output the rated capacity of the power generation facility 7 for the purpose of efficient operation of the power generation facility 7. Control called control is performed. That is, the rated operation control unit 22 performs the (A) rated operation control mode.

  The operation time control unit 23 performs on / off control of the safety / general load 9 for the purpose of continuing power supply to the power generation equipment 7 until the target time set by the monitoring control terminal 5. That is, the operation time control unit 23 performs the above-described (B) operation time control mode in which the load suppression value is fixed and (C) the operation time control mode in which the load suppression value is changed according to the predicted value. When the modes (B) and (C) are performed, the calculation results of the following calculation unit are used. When the target time is not set, the operation time control unit 23 does not perform the safety / general load 9 on / off control.

  The five calculation units in the monitoring control master station 2 are a predicted value calculation unit 24, a consumption calculation unit 25, a time calculation unit 26, a suppression target value calculation unit 27, and a target output calculation unit 28. Among these, the predicted value calculation unit 24 calculates the predicted value of the power load per unit time, that is, the total load of the emergency load 8 and the safety / general load 9. The predicted value of the power load is calculated, for example, in units of 30 minutes, and the day is calculated in 48 divisions. For this reason, the predicted value calculation unit 24 obtains, as a predicted value, the expected power load for each control time period in units of 30 minutes for a plurality of future times and days after the current day.

As a prediction method used by the predicted value calculation unit 24, for example, automatic prediction and manual prediction are assumed. However, it is not limited to these prediction methods.
(1) Automatic prediction: An area including a building to which this embodiment is applied is regarded as one base, weather data such as temperature and humidity of this base, and power load fluctuation data of the day are accumulated in a database, This is a prediction method that automatically refers to similar data from a past database based on weather forecast data including temperature and humidity related to a base.
(2) Manual prediction: This is a prediction method in which typical power load fluctuation data such as weekdays and holidays are set for each season, and a corresponding pattern is manually referred from the database when a commercial power failure occurs.

  As described above, the emergency generator is preliminarily provided with a characteristic curve specific to the generator with respect to fuel consumption. FIG. 3 shows an example of the characteristic curve. Based on this characteristic curve, the consumption calculation unit 25 calculates the fuel consumption when the power generation facility 7 continues the current output, or the fuel consumption corresponding to the prediction value obtained by the prediction value calculation unit 24. .

  The time calculation unit 26 calculates the time until the remaining amount of fuel is expected to be accumulated by integrating the fuel consumption of the power generation facility 7 per unit time as the operation continuation possible time of the power generation facility 7. The suppression target value calculation unit 27 calculates the suppression target value of the security / general load 9 for each unit time based on the ratio between the desired target time and the operation continuation possible time. The target output calculation unit 28 calculates the target output of the power generation facility 7 corresponding to the fuel consumption when the power generation facility 7 continues the current output.

[Monitoring control slave station]
As shown in FIG. 2, the monitoring control slave station 3 is provided with a signal input / output unit 31, a signal conversion processing unit 32, and a communication processing unit 33. The signal input / output unit 31 exchanges signals with the equipment to be monitored and controlled. The signal conversion processing unit 32 converts the received signal into a monitor control signal. The communication processing unit 33 communicates signals with the monitoring control network 1.

  Furthermore, the monitoring control slave station 3 is provided with a generated power measuring unit 34 and a remaining amount measuring unit 35. The generated power measurement unit 34 measures the generated power of the power generation facility 7 based on the generated power signal from the power generation facility 7. The remaining amount measuring unit 35 measures the remaining fuel of the power generation facility 7 based on the remaining fuel signal taken from the power generation facility 7. Although not shown, the monitoring control slave station 4 has a signal input / output unit 31, a signal conversion processing unit 32, and a communication processing unit 33, similarly to the monitoring control slave station 3.

[Supervisory control terminal]
As shown in FIG. 2, the monitoring control terminal 5 includes a communication processing unit 51 for communicating signals in the monitoring control network 1, a display screen processing unit 52 for displaying control states of various facilities, and control settings. An input screen processing unit 53 for inputting is provided.

  The display screen processing unit 52 performs display processing on the following items on the screen displaying the control state. The displayed items include the current power generation and remaining fuel of the power generation facility 7, load prediction data, the operation continuation possible time of the power generation facility 7, the load suppression target value, the load input level, the load group on / off state, and the like. The load prediction data and the load suppression target value are displayed by a graph classified by time zone every 30 minutes. Further, the setting items described later can be displayed as appropriate.

  The input screen processing unit 53 performs the following item setting processing using a user interface such as a keyboard or a mouse on a screen for inputting control settings. The items to be set include the control mode for the safety / general load 9, the control target group of the security / general load 9, the priority and load capacity of each group, the desired target time for which the operation of the power generation facility 7 is desired, and the power generation These are the target output of the facility 7, the lower limit value of the output of the power generation facility 7, and the like.

(Function)
In the building to which the present embodiment is applied, it is assumed that the same facility operation as that at the normal time is expected even during a commercial power outage. This means that the load consumption does not change from the normal time even during a commercial power failure. In addition, when a commercial power failure occurs, until the power is supplied to the emergency load 8 by the power generation facility 7, it is a general power failure control, and the processing is configured by the on-site panel side sequence of the receiving and transforming facility 6. Also, the monitoring control apparatus according to the present embodiment may be configured. In the present embodiment, the control is started after the power supply to the emergency load 8 is performed, and the control is terminated with the commercial power recovery.

  In the input screen processing unit 53 of the monitoring control terminal 5, the control target group of the security / general load 9 is registered and the priority order, load capacity, etc. of each group are set in advance. The control mode of the safety / general load 9 also includes the above three control modes, (A) the rated operation control mode, (B) the operation time control mode with a fixed load suppression value, and (C) the load according to the predicted value. One operation time control mode in which the suppression value is changed is set in advance.

  Based on the above, the control of the security / general load 9 at the time of a commercial power failure in the present embodiment will be described with reference to the flowchart of FIG. In S01, the input screen processing unit 53 of the monitoring control terminal 5 confirms which control mode the security / general load 9 is set to.

(A) Rated operation control mode If the control mode is set to “(A) rated operation control mode” in the input screen processing unit 53 of the monitoring control terminal 5, the rated operation control unit of the monitoring control master station 2 22 performs general self-load control. That is, if the current power generation output of the power generation facility 7 is smaller than a preset target output (Yes in S02), the rated operation control unit 22 inputs a part of the safety / general load 9 (S03). On the contrary, if the power generation output of the current power generation facility 7 is larger than the preset target output (No in S02), the rated operation control unit 22 cuts off a part of the safety / general load 9 (S04).

  Subsequently, the generated power measurement unit 34 of the monitoring control slave station 3 measures the generated power of the power generation facility 7 (S05). In parallel, the remaining amount measuring unit 35 measures the remaining fuel of the power generation facility 7 (S06), and the consumption calculating unit 25 of the monitoring control master station 2 consumes fuel with respect to the generated power based on the characteristic curve. The amount is calculated (S07). Further, the time calculation unit 26 calculates how many hours the operation can be continued with respect to the current output of the power generation facility 7 and obtains the operation continuation possible time (S08). Thereafter, it is confirmed whether or not commercial power recovery has occurred (S09). If it is commercial power recovery (Yes in S09), the process proceeds to power recovery, and if it is not commercial power recovery (No in S09), Return to S01.

(B) Operation time control mode with a fixed load suppression value In the input screen processing unit 53 of the monitoring control terminal 5, the control mode is set to “(B) Operation time control mode with a fixed load suppression value”. For example, the operation time control unit 23 of the supervisory control master station 2 implements this control mode. First, in S10, it is confirmed whether or not the target time is set by the input screen processing unit 53 of the monitoring control terminal 5. When the target time is not set (No in S10), the operation time control unit 23 does not control the security / general load 9, and proceeds to S05 and S06.

  When the target time is set in advance (Yes in S10), the remaining amount measuring unit 35 of the monitoring control slave station 3 measures the remaining fuel of the power generation equipment 7 (S11), and the consumption of the monitoring control master station 2 The quantity calculation unit 25 calculates the target fuel consumption based on the characteristic curve, and the target output calculation unit 28 calculates the target output corresponding to the target consumption (S12).

  If the power generation output of the power generation facility 7 is too low, the efficiency is remarkably deteriorated, and restarting is difficult due to accumulation of soot. Therefore, in this embodiment, it is confirmed whether or not the lower limit value of the power generation facility 7 is set (S13). If the lower limit value is set (Yes in S13), the target power of the power generation facility 7 is the lower limit value. If it falls below (No in S14), it is determined that the operation continuation time of the power generation facility 7 is not appropriate, an error message is displayed (S15), and the process is skipped.

  When the lower limit value of the power generation facility 7 output is not set (No in S13) or the target power of the power generation facility 7 exceeds the lower limit value (Yes in S14), the output of the power generation facility 7 becomes the target power. The security / general load 9 group is turned on / off in order of priority and load capacity. That is, if the power generation output of the power generation facility 7 is smaller than the preset target output (No in S16), the operation time control unit 23 inputs a part of the security / general load 9 (S17). On the contrary, if the power generation output of the power generation facility 7 is larger than the preset target output (Yes in S16), the operation time control unit 23 blocks a part of the security / general load 9 (S18). Thereafter, the process proceeds to S05 and S06.

(C) Operation time control mode in which the load suppression value is varied according to the predicted value In the input screen processing unit 53 of the monitoring control terminal 5, the control mode is changed to “(C) The load suppression value is varied according to the predicted value. If the “operation time control mode” is set, the operation time control unit 23 of the monitoring control master station 2 implements this control mode. First, in S19, it is confirmed whether or not the target time is set in the input screen processing unit 53 of the monitoring control terminal 5. When the target time is not set (No in S19), the operation time control unit 23 does not control the security / general load 9 and proceeds to S09.

  When the target time is set in advance (Yes in S19), the remaining amount measuring unit 35 of the monitoring control slave station 3 measures the remaining fuel of the power generation facility 7 (S20). The predicted value calculation unit 24 of the monitoring control master station 2 predicts the power load per unit time (S21), and the consumption calculation unit 25 calculates the target fuel consumption based on the characteristic curve (S22). ).

  Further, the time calculation unit 26 is calculated as the operation continuation possible time of the power generation equipment 7 (S23). Thereafter, the suppression target value calculation unit 27 calculates the suppression target value of the security / general load 9 for each unit time based on the ratio between the desired target time and the operation continuation possible time (S24). Subsequently, the operation time control unit 23 cuts off or puts on the safety / general load 9 according to the control target value (S25), and proceeds to S09.

A specific example of the operation time control mode in which the load suppression value is changed according to the predicted value will be described with reference to the graphs of FIGS.
a. Calculation of operation continuation possible time by power load prediction per unit time FIG. 5 shows a graph example of power load prediction. As an example, when calculating at 7:30, the expected load from 7:30 to 8:00 is about 150 kW, and the fuel consumption amount is 40 L / h from the load / fuel consumption characteristic curve of FIG. Similarly, by calculating for each time zone and integrating the load expectation, it becomes possible to grasp how long and how much fuel is expected to be consumed.

  In the case of this sample, it will be about 650L by 24:00. If the remaining fuel at the time of calculation is assumed to be 1000 L, the expected fuel at every hour is integrated, and the time zone reaching 1000 L is calculated. The estimated fuel consumption from 0:00 to 12:00 on the next day is about 350 L. As a result, it is possible to calculate that the operation can be continued until 12:00 on the next day.

b. Calculation of Suppression Target Value FIG. 6 shows an example of calculation of the load suppression target value. If the remaining fuel is assumed to be 1000 L and the remaining 29 hours are expected to be able to continue operation, the time to reach the target time is set to 24:00 on the second day. That is, the target time is 41 hours. Operation continuation possible time: A = 29, target time: B = 41, load prediction average: X, load predicted value per unit time: x, average after load suppression: Y, load suppression target value per unit time: y The suppression target value y is obtained as follows.

A * X = B * Y
Y = A / B * X
y = A / B * x = 29/41 * x = 0.7x
The suppression target value calculation unit 27 calculates the suppression target value of the security / general load 9 for each unit time based on the ratio between the target time and the operation continuation possible time, and is set to 0. The value multiplied by 7 becomes the suppression target value (the hatched portion of the bar graph in FIG. 6). The operation time control unit 23 cuts off or puts on the safety / general load 9 according to the suppression target value thus obtained.

(effect)
According to the first embodiment, when the power supply to the power generation facility 7 cannot be expected for a while at the time of power feeding by the power generation facility 7 after a commercial power failure due to an earthquake or the like, the operation time control unit 23 sets “ By performing the “operation time control mode in which the load suppression value is varied according to the predicted value”, it is possible to suppress the load that supplies power and to increase the operation continuation time of the power generation facility 7. That is, in the present embodiment, the load suppression control for the security / general load 9 can be automatically performed in consideration of the balance between the expected time until the situation recovery, that is, the target time, and the importance of the power load.

  The above effects are effective in the following cases. For example, when the building to which the present embodiment is applied is a hospital, the power supply target at the time of a commercial power failure is determined in advance, but the commercial power recovery, the fuel supply to the power generation facility 7, Suppose that the situation where the transportation cannot be expected immediately. In such a situation, when the expected time until the situation recovery exceeds the operation continuation possible time by the normal control of the power generation equipment 7, the load suppression value is changed according to the predicted value by using this embodiment. Thus, the operation continuation possible time of the power generation facility 7 can be extended to a desired target time. As a result, it is possible to continue power supply to important loads related to the lives of hospitalized patients even at the expense of the overall power supply.

  In addition, in the present embodiment, it is possible to automatically calculate and obtain the suppression target value for the load per unit time from the predicted value of the power load per unit time, and to perform load control in accordance with the operation. Therefore, the power suppression amount of the load can be finely adjusted according to the demand, and the power consumption can be suppressed to the maximum while balancing with the demand.

  Therefore, even if the power generation facility 7 covers a large load with a large load fluctuation during a commercial power outage, the amount of power suppression can be efficiently narrowed down without causing inconvenience to users of the general load. It is possible to extend the possible operation continuation time as much as possible. As described above, according to the present embodiment, the amount of power suppression to the load is determined after predicting the load amount, and the power suppression is performed while avoiding restricting the operation of the general load even during a commercial power failure. This can contribute to optimizing the amount and maximizing the operation continuation time.

(2) Second embodiment (configuration)
In the monitoring control device according to the second embodiment, (C) in the operation time control mode in which the load suppression value is changed according to the predicted value, the lower limit value of the load suppression target value is displayed on the input screen of the monitoring control terminal 5. This can be set by the processing unit 53. The lower limit value of the load suppression target value is set to a value smaller than the predicted load value per unit time. Except for the above points, the second embodiment is the same as the first embodiment with respect to basic components.

(Function)
Control of the security / general load 9 during a commercial power failure in the second embodiment will be described with reference to the flowchart of FIG. When the operation time control unit 23 of the monitoring control master station 2 implements “(C) operation time control mode in which the load suppression value is changed according to the predicted value”, the operation continuation possible time of the power generation equipment 7 is calculated S23. And S26 enters between S24 which calculates the control target value of security / general load 9. In S26, it is confirmed whether or not the lower limit of the load suppression target value is set. When the lower limit of the suppression target value is not set (Yes in S26), the process proceeds to S24 and the suppression target value is obtained.

  On the other hand, when the lower limit of the load suppression target value is set (No in S26), the process proceeds to S27 to obtain the load suppression target value. The graph of FIG. 8 shows an example of the predicted value and the suppression target value when the lower limit value of the load suppression target value is set to 35 kW. The point that the remaining fuel is 1000 L, the target operation continuation time is 24:00 on the second day, that is, the target time is 41 hours, is the same as the graph shown in FIG.

  Operation continuation possible time: A = 29, target time: B = 41, load prediction average: X = 150, load prediction value per unit time: x, average after load suppression: Y, load suppression target value per unit time: The suppression target value calculator 27 calculates the suppression target value y, where y is the lower limit value of the load suppression target value: Z (<x) = 35, and the load suppression count is α.

A * X = B * Y
A * X = B * ((X−Z) α + Z) = B (X−Z) α + BZ
α = (AX−BZ) / (BX−ZB)
= (29 * 150-41 * 35) / (41 * 150-35 * 41)
= (4350-1435) / (6150-1435) = 0.62
y = Z + α (x−Z) = 35 + 0.62 (x−35)
That is, the load suppression target value in the second embodiment is obtained by multiplying the load amount obtained by subtracting the lower limit value from the predicted value of each load by the suppression count. The operation time control unit 23 cuts off or puts on the safety / general load 9 according to the load suppression target value thus obtained.

(effect)
According to the second embodiment, after setting the lower limit value of the load suppression target value, the optimum suppression target value can be automatically set, and the load suppression target value falls below the lower limit value. It is never squeezed. Therefore, it is possible to select a minimum load that cannot be suppressed among the safety / general loads 9 as an important load, and to reliably supply power to a highly important load. it can. Thereby, it is possible to improve the safety and convenience for the user of the load.

  In the above embodiment, only the load suppression of the security / general load 9 is performed. However, the emergency load 8 may be included as a load control target. That is, instead of unconditionally supplying power to the emergency load 8 at the time of a commercial power failure, the power supply to the minimum emergency load 8 is provided by setting the lower limit value of the suppression target value. The amount of power suppression can be further increased. Thereby, it is possible to further extend the operation continuation time of the power generation facility 7 in an emergency such as the occurrence of a major disaster.

(3) Third embodiment (configuration)
In the monitoring control apparatus according to the third embodiment, the suppression target value calculation unit 27 calculates the suppression target value of the load in “(C) driving time control mode in which the load suppression value is changed according to the predicted value”. Instead, the setting is made manually by the input screen processing unit 53 of the monitoring control terminal 5. For example, in the graph of FIG. 9, the manual setting of the load suppression target value is performed by manually setting a target suppression value lower than the calculated target suppression value near 11:00 as indicated by an arrow. On the other hand, the target suppression value is manually set higher than the target suppression value obtained by calculation around 12:00 when demand is expected to be large.

(Function)
Control of the security / general load 9 at the time of a commercial power failure in the third embodiment will be described with reference to the flowchart of FIG. When the operation time control unit 23 of the monitoring control master station 2 implements “(C) the operation time control mode in which the load suppression value is changed according to the predicted value”, after S19 for confirming the setting of the target time, S28 is performed. Enters. In S28, it is confirmed whether or not the manual setting of the load suppression target value is invalid. If the manual setting of the load suppression target value is invalid (Yes in S28), the process proceeds to S20 and S21, and the suppression target value calculation unit 27 calculates and determines the load suppression target value.

  On the other hand, if the manual setting of the load suppression target value is valid (No in S28), the process proceeds to S29. In S29, the suppression target value of the load for each unit time is manually set, and the calculation process of the suppression target value by the suppression target value calculation unit 27 is omitted, and the process proceeds to S25.

(effect)
In the first and second embodiments described above, a process for calculating the load suppression target value according to the predicted load value is performed, and if such a processing flow is performed once, the load suppression target value is calculated. Will continue to be set automatically. On the other hand, in the third embodiment, even after calculating the load suppression target value according to the predicted load value, the load suppression target value is manually set and distributed to an arbitrary balance, and load suppression control is performed. Can be implemented.

  According to the third embodiment, by enabling the manual setting of the load suppression target value, the setting of the load suppression target value can be arbitrarily changed for each unit time. . Therefore, the target operation continuation possible time can be recalculated based on the suppression target value arbitrarily set and changed, and also confirming the load suppression target value according to the predicted load value obtained by calculation. . As a result, it is possible to set a load suppression target value that more closely matches the actual situation, and it is possible to accurately and flexibly reflect the operator's intention regarding the load suppression control.

[Other Embodiments]
The above embodiment is presented as an example in the present specification, and is not intended to limit the scope of the invention. In other words, the present invention can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof as well as included in the scope and gist of the invention.

  A monitoring control method executed by the monitoring control apparatus and a program for realizing each function are also one embodiment of the present invention. The program according to the present embodiment may be for realizing a part of the function, or may be realized by combining with another program.

  The program is recorded on a computer-readable recording medium, specifically, a portable medium such as a CD-ROM or a hard disk built in the computer system, and the program recorded on such a recording medium is stored in the computer system. This embodiment may be realized by being read and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, as the recording medium, the following (1) and (2) are included in addition to the above-described examples of the CD-ROM and the like.
(1) A program that dynamically holds a program for a short time, such as a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line.
(2) A program that holds a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or client in that case.

DESCRIPTION OF SYMBOLS 1 ... Monitoring control network, 2 ... Monitoring control master station, 3, 4 ... Monitoring control slave station, 5 ... Monitoring control terminal, 6 ... Substation equipment, 7 ... Power generation equipment, 8 ... Emergency load, 9 ... Safety and general load , 21 ... communication processing unit, 22 ... rated operation control unit, 23 ... operation time control unit, 24 ... predicted value calculation unit, 25 ... consumption calculation unit, 26 ... time calculation unit, 27 ... suppression target value calculation unit, 28 ... target output calculation unit, 31 ... signal input / output unit, 32 ... signal conversion processing unit, 33 ... communication processing unit, 34 ... generated power measurement unit, 35 ... remaining amount measurement unit, 52 ... display screen processing unit, 53 ... input Screen processor

Claims (10)

A remaining amount measuring unit for measuring the remaining amount of fuel held by the generator;
A predicted value calculation unit for calculating a predicted value of the power load per unit time;
A consumption calculator that calculates the fuel consumption of the generator corresponding to the predicted value based on a characteristic curve given in advance;
A time calculation unit that integrates the consumption of the fuel per unit time and calculates an operation continuation time of the generator from the remaining amount of the fuel;
A target time setting unit for setting a target time for continuing the operation of the generator;
A suppression target value calculating unit that calculates a suppression target value of the power load per unit time according to a ratio between the target time and the operation continuation possible time;
A load control unit that performs on / off control of the power load so as to satisfy the calculated suppression target value;
A monitoring and control device. A suppression target value setting unit that arbitrarily sets a suppression target value of the power load per unit time;
A load control unit that performs on / off control of the power load so as to satisfy the set suppression target value;
The monitoring control device according to claim 1, comprising:   The monitoring control device according to claim 2, wherein the time calculation unit is configured to calculate a continuable time when the generator is operated with the set suppression target value. A lower limit value setting unit for presetting a lower limit value of the suppression target value;
The monitoring control device according to claim 1, wherein the load control unit is configured to perform on / off control of the power load in preference to the lower limit value over the suppression target value. A target output calculation unit for calculating a target output of the generator;
If the target output is below the lower limit, an error message display unit that displays an error message,
The monitoring control device according to claim 4, comprising: A target output calculation unit for calculating the target output of the generator;
6. The monitoring control device according to claim 4, wherein when the target output falls below the lower limit value, the load control unit skips on / off control of the power load.   The monitoring control device according to claim 1, wherein the predicted value calculation unit is configured to calculate a predicted value of an electrical load based on weather data and weather forecast data.   The monitoring control terminal which displays at least one of the remaining amount of fuel of the generator, the predicted value of the electric power load, the amount of fuel consumption of the generator and the operation continuation time is provided. The monitoring control apparatus of any one of Claims. A supervisory control method executed by the supervisory control device,
A remaining amount measuring step for measuring the remaining amount of fuel held by the generator;
A predicted value calculation step for calculating a predicted value of the power load per unit time;
A consumption calculation step of calculating a fuel consumption of the generator corresponding to the predicted value based on a characteristic curve given in advance;
A time calculating step of calculating the duration of continuous operation of the generator from the remaining amount of the fuel by integrating the consumption of the fuel per unit time;
A target time setting step for setting a target time for continuing the operation of the generator;
A suppression target value calculation step for calculating a suppression target value of the power load per unit time according to a ratio between the target time and the operation continuation possible time;
A load control step for performing on / off control of the power load so as to satisfy the calculated suppression target value;
Monitoring control method including. On the computer,
A remaining amount measuring step for measuring the remaining amount of fuel held by the generator;
A predicted value calculation step for calculating a predicted value of the power load per unit time;
A consumption calculation step of calculating a fuel consumption of the generator corresponding to the predicted value based on a characteristic curve given in advance;
A time calculating step of calculating the duration of continuous operation of the generator from the remaining amount of the fuel by integrating the consumption of the fuel per unit time;
A target time setting step for setting a target time for continuing the operation of the generator;
A suppression target value calculation step for calculating a suppression target value of the power load per unit time according to a ratio between the target time and the operation continuation possible time;
A load control step for performing on / off control of the power load so as to satisfy the calculated suppression target value;
A program that executes

Images