JP6772939B2 - Operation control system for equipment in an emergency - Google Patents

Description

The present invention relates to an operation control system for equipment in an emergency, and more specifically, even if power distribution equipment in various places fails due to an earthquake or the like, it is efficient for the main equipment in the equipment. It relates to an operation control system that can be powered and activated.

In various types of equipment such as factory equipment and electric control equipment, a control system for equipment that automatically starts the equipment when a power failure occurs during continuous operation and then the power is restored has been proposed.

For example, Patent Document 1 proposes an operation control system for transportation equipment such as elevators and equipment such as air conditioning equipment. However, this technology is an automatic control system at the time of power recovery of the power system normally used under normal conditions, and there is no description about power recovery in the "emergency" power system, and all power systems are out of power due to an earthquake or the like. If this happens, there is a problem that the normally used power system must wait until the power is restored.

In recent years, many production facilities have been installed in various production factories from the viewpoint of improving production capacity and production efficiency. For example, in the case of a copper smelting factory, equipment such as a self-melting furnace, a converter, a boiler attached to a purification furnace, various circulation pumps, and a cooling tower are installed to maintain the productivity of the factory. ..

In such a production factory, an emergency power generation device such as a diesel engine generator (DEG) is generally provided in case of a total power failure in the power system. When the power system is completely out of power due to an earthquake or the like, the emergency line switching board (hereinafter, also referred to as "engine line switching board") detects the power outage state, and the power generation device such as DEG is automatically started. Then, when the voltage of the DEG is established, power is transmitted to a plurality of equipment (load equipment) to be activated for emergency response, and the equipment is activated.

At this time, in order to avoid the possibility that the load of starting the equipment is duplicated and the DEG trips, the starting order is determined for each equipment so that the equipment having the largest starting capacity is started in sequence.

However, in factory equipment, for example, if the number of equipment to be manually started increases, there is a risk that the starting load will be duplicated and the initial load will increase. In addition, in the event of an earthquake or the like, there is a risk that the manual startup operation will be delayed due to the confusion of workers in addition to the operational response.

Furthermore, in the case where multiple DEGs are operated synchronously and transmitted to one emergency power supply system, when one DEG fails, the power generation capacity or more is increased to the normally operating DEG that has not failed. Since the load is applied, the normally operating DEG may also trip. Further, in the case where the emergency power generation system is one series, if a power distribution facility such as a high-voltage cable fails due to an accident or the like, there is a risk that all the systems below the accident point will be out of power.

Japanese Unexamined Patent Publication No. 2001-337702

The present invention has been proposed in view of such circumstances, and is an emergency power system for automatically starting equipment by the emergency power system when the power system in the equipment such as factory equipment has a total power failure. It is an object of the present invention to provide an operation control system capable of preventing duplication of starting load due to the above-mentioned factors and efficiently starting equipment to be started without delay.

As a result of repeated diligent studies, the present inventor determines in advance the order of starting the devices (equipment devices) in the equipment, executes the starting operation for each device according to the order, and elapses a predetermined time. Also found that the above-mentioned problems can be solved by stopping the start operation for the equipment and executing the start operation for the equipment in the next order when the predetermined equipment does not start. The invention was completed.

(1) The first invention of the present invention is an operation control system that automatically starts a predetermined equipment by an emergency power system when the power system in the equipment has a total power failure, and is an operation control system of the power system in the equipment. A load equipment group consisting of a power failure detection unit that detects a power failure, a diesel engine generator (DEG) that is a power source for an emergency power system, and a plurality of devices that are activated in response to an emergency, and the load equipment group. The control unit includes a control unit composed of a control device for activating the equipment, and the control unit determines in advance the order of activating the equipment constituting the load equipment equipment group, and activates each equipment according to the order. It is an operation control system that executes an operation, stops the start operation for the device, and executes the start operation for the device in the next order when the predetermined device does not start even after a predetermined time elapses.

(2) The second invention of the present invention is an operation control system further including, in the first invention, a start-up time measuring unit for measuring the time until a predetermined device constituting the load equipment device group starts up. is there.

(3) The third invention of the present invention is an operation control system in the first or second invention, in which a plurality of the DEGs are provided and a plurality of series of emergency power systems are provided.

(4) The fourth invention of the present invention is, in the third invention, an operation control system having a power transmission system which can be connected to each other on the upper side of the plurality of series of emergency power supply systems.

(5) The fifth invention of the present invention is an operation control system having a power transmission system which can be connected to each other on the lower side of the plurality of series of emergency power supply systems in the third invention.

According to the present invention, it is possible to prevent duplication of starting loads by the emergency power system when the equipment is automatically started by the emergency power system when the power system in the equipment such as factory equipment has a total power failure. The equipment to be started can be started efficiently without delay.

It is a block diagram which shows the structure of an operation control system. It is a flowchart which shows the flow of control by an operation control system at the time of a total power failure of a normal power system. It is a figure which shows the structure of the operation control system which concerns on other embodiment, and is the figure which shows the mode of the structure which is provided with a plurality of DEG, and has a plurality of series of emergency power systems.

Hereinafter, embodiments of the present invention (hereinafter, referred to as “the present embodiment”) will be described in detail. The present invention is not limited to the following embodiments, and various modifications can be made without changing the gist of the present invention.

≪1. Operation control system configuration ≫
The operation control system according to the present embodiment is an operation control system that automatically starts a predetermined equipment by the emergency power system when the power system of equipment such as factory equipment has a total power failure. In general, factory equipment and the like are provided with a power system used for normal operation (normal power system) and an emergency power system that is activated when the normal power system has a total power failure.

Various equipment is installed in the equipment such as factory equipment. For example, in the equipment of a copper smelting factory, a self-melting furnace, a converter, a boiler attached to a purification furnace, various circulation pumps, a cooling tower, etc. Equipment is equipped. These equipments are equipments that are activated by the supply of electric power by the electric power system, and are also called electric power load equipments.

Here, among the above-mentioned load equipment, there is equipment that should be started preferentially in an emergency such as when the normal power system has a total power failure due to an earthquake or the like. The operation control system according to the present embodiment is a system for efficiently and automatically starting the load equipment in the equipment by the emergency power system when the normal power system has a total power failure.

FIG. 1 is a block diagram showing a configuration of an operation control system according to the present embodiment. As shown in FIG. 1, the operation control system 1 includes a power failure detection unit 11 for detecting a power failure, a diesel engine generator (DEG) 12 as a power source for an emergency power system, and a plurality of operation control systems 1 activated by the power system in the facility. A load equipment group 13 composed of the above devices and a control unit 14 composed of a control device for activating the equipment in the load equipment group 13 are provided.

Further, the operation control system 1 is further provided with a start-up time measuring unit 15 for measuring the time until the predetermined equipment in the load equipment device group 13 is started up based on the operation start-up operation by the control unit 14. In the example shown in FIG. 1, in the operation control system 1, the control unit 14 and the start-up time measurement unit 15 are provided as separate configurations, but the control unit 14 performs the operation start operation by itself. It may have a function of measuring the time until activation based on the above, and even in such an embodiment, there is substantially no difference from the present embodiment, and it is included in the scope of the present invention. ..

[Power failure detector]
The power failure detection unit 11 detects that the power system in the facility has a power failure. The power failure detection unit 11 is electrically connected to the DEG 12 and the control unit 14, which will be described later, and when it detects that the power system in the facility has a power failure, it outputs the power failure detection signal to the DEG 12 and the control unit 14.

[DEG]
The diesel engine generator (DEG) 12 is a power source for an emergency power system. When the normal power system is completely out of power due to an earthquake or the like, the emergency power system is activated. The DEG 12 is a power supply device for the emergency power system, and operates based on a power failure detection signal from the electrically connected power failure detection unit 11.

[Load equipment group]
The load equipment device group 13 is an aggregate of a plurality of power load equipment devices provided in the facility and activated by electric power. In FIG. 1, "equipment 1", "equipment 2", ... "Equipment n" (n is an integer of 2 or more) indicates equipment equipment constituting the load equipment equipment group 13. Each equipment is electrically connected to a control unit 14 described later, and when an operation start command from the control unit 14 is received, the operation is sequentially started. When each equipment starts the operation start, the start-up completion signal is transmitted to the control unit 14 to report that the operation start is completed.

Here, the order in which each equipment device constituting the load equipment device group 13 is started by the emergency power system is predetermined. For example, in factory equipment, when generated gas or liquid remains in the piping, equipment such as a circulation pump or blower for discharging the residue is preferentially started from the viewpoint of improving safety. Is required. In this way, in the load equipment group 13, the order of starting the start in an emergency such as a power failure is determined in advance, and in the automatic start by the emergency power system, the start sequence of the equipment is executed according to the order. ..

[Control unit]
The control unit 14 controls the activation of the equipment equipment constituting the load equipment equipment group 13. The control unit 14 is composed of a device (control device) for activating the equipment, and outputs and transmits an operation start command to each equipment. The details of the start control of the equipment constituting the load equipment group 13 will be described in detail later.

[Startup time measurement unit]
The start-up time measuring unit 15 measures the time from the start of the operation start-up operation by the control unit 14 to the start-up of the predetermined equipment equipment constituting the load equipment equipment group 13. The control unit 14 is based on the measurement time by the start-up time measurement unit 15 and the start-up completion signal from the predetermined equipment device (for example, the device 1 in FIG. 1) that has received the operation start command. It confirms whether or not the equipment is started, and controls the sequential start-up of the equipment equipment constituting the load equipment equipment group 13. As described above, the start-up time measuring unit 15 may be incorporated into the control unit 14 to have the same configuration, and the control unit 14 may measure the time until start-up.

≪2. Start control by operation control system ≫
Next, a method of starting control of equipment by the operation control system 1, that is, a method of starting control of equipment by the operation control system 1 using the emergency power system when the normal power system has a total power failure will be described.

FIG. 2 is a flowchart showing a flow of control by the operation control system 1 when the normal power system has a total power failure. In the operation control system 1, the control unit 14 constantly monitors the presence or absence of power failure detection information (power failure detection signal) by the power failure detection unit 11, and when the power failure is detected, the control unit 14 enters the power failure sequence and is the load equipment device to be automatically started. A start command is sequentially output to the equipment constituting the group 13 to start the device. In addition, in the equipment equipment constituting the load equipment equipment group 13, the start-up shall be started in the order of "equipment 2", "equipment 3", ... "Equipment n" from "equipment 1" in FIG. ..

First, when entering the power failure sequence, the control unit 14 executes confirmation (ON confirmation) of the presence or absence of the power failure detection signal from the power failure detection unit 11 (step SP1), and confirms the reception of the power failure detection signal (YES). The process proceeds to step SP2. At this time, the power failure detection unit 11 also transmits the power failure detection signal to the DEG 12. Upon receiving the power failure detection signal from the power failure detection unit 11, the DEG 12 starts the operation of the emergency power system and transmits the voltage establishment signal to the control unit 14.

Next, in step SP2, the control unit 14 performs an output cutoff process for cutting off the output of the operation command for the equipment equipment that does not need to be started among the equipment equipments constituting the load equipment equipment group 13 prior to the power recovery. .. As a result, it is possible to prevent the power capacity from becoming tight due to the startup of equipment that does not need to be started.

Next, in step SP3, the control unit 14 executes confirmation (ON confirmation) of the presence / absence of the voltage establishment signal from the DEG 12, and when it confirms the reception of the voltage establishment signal (YES), the process proceeds to step SP4. On the other hand, if the reception of the voltage establishment signal from the DEG 12 is not confirmed, the confirmation operation is repeated.

Next, in step SP4, the control unit 14 starts the automatic start management timer by the start time measurement unit 15, and starts the time counting until the equipment is started.

Next, in step SP5, the control unit 14 starts counting up the automatic start management timer by the start time measurement unit 15.

Next, in step SP6, the control unit 14 confirms whether or not the power transmission system up to the equipment (equipment 1) to be activated is charged. For example, there is a possibility that the power transmission system is not charged due to a cable disconnection caused by an earthquake or the like. Therefore, it is confirmed whether or not the power transmission system to the equipment is charged, and if it is not charged (NO), in step SP7, the automatic start exclusion flag is turned ON and the start failure message is turned ON. The state is set, the automatic start sequence of the equipment (equipment 1) is interrupted, and the process shifts to the automatic start sequence of the equipment (equipment 2) in the next start order. By doing so, it is possible to effectively prevent the startup of other equipment from being delayed.

On the other hand, when it is confirmed that the power transmission system is charged (YES in step SP6), the process proceeds to step SP8. In step SP8, the control unit 14 confirms whether or not the operating conditions of the load equipment (equipment 1) to be activated are satisfied. Examples of the operating conditions include operating conditions such as temperature conditions and pressure conditions.

If it is determined in step SP8 that the operating conditions of the equipment are not satisfied (NO), the process proceeds to step SP9. In step SP9, the control unit 14 turns on the automatic start / standby flag, starts the standby time management timer, and waits until the operation conditions for starting the equipment are satisfied. Then, if the operation condition for the activation is not satisfied even after the arbitrarily set standby time elapses, the process proceeds to step SP11, the automatic activation standby flag is turned off, and the standby time management timer is stopped. Then, the process shifts to the automatic start sequence of the equipment (device 2) in the next start order.

If it is determined in step SP8 that the operating conditions of the equipment are satisfied (YES), the process proceeds to step SP10. In step SP10, the control unit 14 confirms the load-addable capacity from the DEG 12 that supplies electric power to the equipment, and determines whether or not the equipment can be started from the load capacity.

If it is determined in step SP10 that the capacity of the DEG is not sufficient (NO), the process proceeds to step SP9, and the control unit 14 turns on the automatic start standby flag and starts the standby time management timer. Wait until the loadable capacity is satisfied. Then, if the load-loadable capacity is not sufficient even after the arbitrarily set standby time elapses, the process proceeds to step SP11, the automatic start standby flag is turned off, and the standby time management timer is stopped. , Moves to the automatic start sequence of the equipment (device 2) in the next start order.

If it is determined in step SP10 that the capacity of DEG12 is sufficient (YES), the process proceeds to step SP12. In step SP12, the control unit 14 outputs an operation command to the equipment (equipment 1) for which the operation condition is satisfied (load operation signal ON).

Next, in step SP13, the control unit 14 confirms the load activation of the equipment that outputs the operation command. Then, if the load start is not confirmed (NO) even after the arbitrarily set time elapses, the control unit 14 proceeds to step SP14, and if the load start is confirmed (YES), the control unit 14 proceeds to step SP15.

In step SP14, since the load start of the equipment is not confirmed even after the arbitrarily set time elapses, the automatic start failure flag is turned ON and the start failure message is turned ON, and the next start sequence is set. Shift to the automatic start sequence of the equipment (equipment 2) of.

In step SP15, the automatic start success flag is set to the ON state when the load start of the equipment is confirmed.

Next, in step SP16, the control unit 14 confirms whether or not all the equipment and devices constituting the load equipment equipment group 13 have been started (confirmation of the end of the full load start process). When the startup of the equipment "equipment 1" in FIG. 1 is completed, the automatic activation sequence of "equipment 2", "equipment 3", ... "Equipment n" is sequentially performed according to the activation order determined in advance. Then the automatic startup starts. That is, the flow of "NO" as a result of the confirmation in step SP16 becomes the transition flow to the sequence of the next activation order.

Then, when it is determined in step SP16 that all the equipment and devices constituting the load equipment group 13 have been started (YES), the power failure sequence completion message is turned on and the automatic control sequence is stopped.

As described above, according to the operation control system 1 according to the present embodiment, the starting loads of the equipment in the factory are started in stages so as not to overlap, and the overlapping starting loads can be prevented. it can. Therefore, troubles such as trips of the DEG can be prevented, and the automatic start can be efficiently performed without the intervention of an operation by the operator. In addition, if the specified equipment does not start normally even after the arbitrarily set time elapses due to a failure of the power transmission equipment or failure of the start conditions, the automatic start sequence of the equipment is interrupted and the next start order is taken. By shifting to the start-up sequence of the equipment, the equipment can be started without delay.

≪3. Operation control system with multiple series of emergency power systems ≫
FIG. 3 is a diagram showing a configuration of an operation control system according to another embodiment. As shown in FIG. 3, the operation control system 2 according to another embodiment is provided with two DEGs and has two series of emergency power systems. The code of the first DEG is "21", and the code of the second DEG is "22".

Further, the operation control system 2 includes a first circuit breaker 23 for connecting two series of emergency power systems to each other on the upper side where the first DEG 21 and the second DEG 22 are located, and two series of emergency power systems on the lower side. It includes a second circuit breaker 24 that connects the power systems to each other.

In the operation control system 2, when the equipment is started by the emergency power system from the DEG in an emergency such as an earthquake, the first circuit breaker 23 and the second circuit breaker 24 are usually opened. The first DG 21 and the second DEF 22 are configured to transmit power to one series of emergency power systems for each unit. That is, the emergency power system from the first DEG 21 supplies power to the load equipment groups 31 and 32, and the emergency power system from the second DEG 22 supplies power to the load equipment groups 33 and 34. It is configured so that power is supplied.

On the other hand, by providing the first circuit breaker 23 for connecting the two series of emergency power systems to each other on the upper side, either the first DEG 21 or the second DEG 22 fails and becomes inoperable. Even in this case, it is possible to appropriately supply electric power to the equipment.

That is, when one DEG (for example, the first DEG 21) fails, the power load on the equipment is limited at a predetermined ratio, and then the first circuit breaker 23 is turned on to form two series of emergency power systems. Try to connect. As a result, not only the load equipment groups 33 and 34 that are normally activated by power transmission from the second DEG 22 but also the load equipment groups 31 and 32 are activated by the power supply from the second DEG 22 that has not failed. Can be made to.

Further, even if a trouble such as disconnection occurs in the high-voltage cable constituting the regular line, the equipment can be appropriately connected by providing the second circuit breaker 24 for connecting the two series of emergency power systems to each other on the lower side. Power transmission can be continued.

That is, for example, when the high-voltage cable of the regular line is broken at the location indicated by X in FIG. 3, the disconnector 25 is opened to limit the load of the regular line, and then the second circuit breaker 24 is turned on. By connecting the emergency power systems of the series, the failed range can be separated and power can be transmitted to both systems.

At the time of power transmission by DEG, as described above, both the first circuit breaker 23 and the second circuit breaker 24 are normally in the open state, but due to an erroneous operation, the first circuit breaker 23 or the second circuit breaker 24 When 24 is thrown in, the first DEG21 and the second DEG22 may trip. Therefore, it is desirable to provide an interlock to prevent the circuit breaker from being turned on due to an erroneous operation.

As described above, when a plurality of DEGs are provided, the emergency power supply system is divided into a plurality of series to be a system that does not require synchronous operation of the DEGs. Furthermore, by adopting a power transmission system provided with a circuit breaker (circuit breaker 23) that can connect multiple series on the upper side of the emergency power system, when a failure of one DEG is detected, the load is limited at each location. By connecting to a healthy grid after this, it is possible to transmit power to all grids.

In addition, by using a power transmission system equipped with a circuit breaker (circuit breaker 24) that can connect multiple lines on the lower side of the emergency power system, if the power distribution equipment at various locations breaks down due to the effects of an earthquake or the like, The power outage spread range can be minimized by connecting and opening the system according to the location of the failure.

1, 2 Operation control system 11 Power failure detector 12 Diesel engine generator (DEG)
13, 31, 32, 33, 34 Load equipment group 14 Control unit 15 Start-up time measurement unit 21 First DEG
22 Second DEG
23 First circuit breaker 24 Second circuit breaker 25 Disconnector

Claims (5)

It is an operation control system that automatically starts the specified equipment by the emergency power system when the power system in the equipment is completely out of power.
A power outage detector that detects power outages in the power system in the facility,
Diesel engine generator (DEG), which is the power source for the emergency power system,
A group of load equipment consisting of multiple devices to be activated in case of an emergency,
A control unit composed of a control device for activating the equipment of the load equipment group, and
With
The control unit
The order of starting the devices constituting the load equipment device group is determined in advance, and the starting operation for each device is executed according to the order.
An operation control system that stops a start operation for a predetermined device and executes a start operation for the next device in the next order when the predetermined device does not start even after a predetermined time has elapsed. The operation control system according to claim 1, further comprising a start-up time measuring unit that measures the time until a predetermined device constituting the load equipment device group starts up. The operation control system according to claim 1 or 2, wherein a plurality of the DEGs are provided and a plurality of series of emergency power systems are provided. The operation control system according to claim 3, further comprising a power transmission system capable of connecting each of the plurality of series of emergency power supply systems on the upper side. The operation control system according to claim 3, further comprising a power transmission system capable of connecting each of the plurality of series of emergency power supply systems on the lower side.

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