JPH10313537A - Monitoring control device of hydro electric power station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring control device of a hydro-electric power station, which can continue the operation of a generator as much as possible when abnormal state occurs and can respond to the load requirement as much as possible as the total system. SOLUTION: This device has a local area network, which mutually connects each abnormality monitor 4 and each automatic controller 6 provided in each of a plurality of water-wheel generators 1. And when any of the abnormality monitors 4 has detected the abnormality of the waterwheel generator to be monitored, the abnormality monitor 4 transmits the abnormal signal having the abnormal ranking to the automatic controllers 6 of own and other monitor controllers 2A-2C through the local area network 10. The own generator, which has received the abnormal signal, refers to the abnormal rank. When it is judged that the abnormality does not require the emergency stopping, the operation is continued by adding the output limitation without stopping the own water- wheel generator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention has a plurality of turbine generators,
The present invention relates to a monitoring and control device for a hydroelectric power plant having an automatic control device and a protection device for each turbine generator.

[0002]

2. Description of the Related Art The history of a hydroelectric power plant is quite old, and for this reason, devices for monitoring and controlling the equipment of the hydroelectric power plant often follow old technologies. FIG. 8 shows an example of a configuration of a monitoring and control device of this type of hydroelectric power plant.

The hydraulic power plant shown in FIG. 8 includes a plurality of (here, for example, three) turbine generators 1A, 1B, and 1C, and each of the turbine generators has a monitoring and control device 2A, 2A.
B, 2C. Each monitoring control device 2
A, 2B, and 2C each include a monitoring sensor 3 that detects a physical quantity for monitoring the turbine generator, and an abnormality monitoring device 4 that receives a detection output of the sensor 3 and transmits the detection output to the central control station 8.
An automatic control sensor 5 for automatically controlling the turbine generator, an automatic control device 6 for receiving a detection output of the sensor 5 and deriving an operation amount for the automatic control, and an operation from the automatic control device 6. A protection device 7 is provided that transmits the amount to the generator and obtains the detection output of the sensor 5 to urgently stop the generator when it is determined that there is an abnormality that requires an emergency stop. The sensor 3 detects, for example, loss of power to the sequencer, rotation speed of the turbine generator, oil pressure for bearings, bearing temperature, and the like. The sensor 5 considerably overlaps with the detection target of the sensor 3, but also includes a sensor for detecting a direct physical quantity of the control target such as a generator voltage or a current.
In the central control station 8, the monitoring personnel monitors the information obtained from the abnormality monitoring devices 4 of the respective monitoring control devices 2A, 2B, 2C, and if necessary, sends a signal for control to the automatic control device 6 of the relevant monitoring control device. Send.

FIG. 9 is a block diagram showing the monitoring and control device 2A shown in FIG.
2B and 2C are collectively referred to as a supervisory control device 2, and in order to improve the reliability of the control device, redundant automatic control provided with two sets of automatic control devices 6a and 6b having the same configuration for each generator unit. 1 shows an apparatus. Here, the monitoring control device 2 includes a monitoring sensor 3, an abnormality monitoring device 4, an automatic control sensor 5, automatic control devices 6a and 6b, and a protection device 7, and an abnormality occurs in the automatic control device during operation. Then, the operation is switched from the abnormal automatic control device to the other sound automatic control device to continue the operation.

Next, the operation of the abnormality monitoring devices 2A, 2B, 2C of FIG. 8 will be described with reference to FIG. When the abnormality of the turbine generator 1 is detected by the sensor 3, an abnormality that may cause an emergency stop of the equipment in the power plant including the turbine generator 1, for example, an abnormally rising tendency of the bearing temperature is detected in advance.
The automatic control device 6 controls the attached device to control the output voltage, frequency and power of the turbine generator 1 to predetermined values, and sends a failure signal to the protection device 7 when an abnormality is detected.
The emergency stop of the turbine generator 1 is performed. The operation of the device shown in FIG. 9 as viewed from the generator 1 is basically the same as that of the device shown in FIG. 8, and when the automatic control device in use fails, the other automatic control device is activated instead. Is the feature.

[0006]

In the monitoring and control device configured as described above, the abnormality monitoring device 4 for monitoring the abnormality of the turbine generator and the protection device 7 for urgently stopping the turbine generator in the event of an abnormality. Since it is provided separately, when any abnormality occurs in the turbine generator, even if the abnormality monitoring device 4 determines that the abnormality does not require an emergency stop, the abnormality signal is transmitted to the abnormality monitoring device. Since there was no means for direct transmission from the automatic control device 4 to the automatic control device 6, the automatic control device 6 often detected an abnormality and judged that it was out of order, and often stopped the generator 1 in an emergency. If the generator is stopped immediately, it will not be possible to respond to a load request from the system.

In the abnormality monitoring device 2 of FIG. 9 provided with a redundant automatic control device, an unused automatic control device always exists in each monitoring control device, and the cost of the entire system increases. At the same time, the required space for installing the equipment becomes large.

Accordingly, the present invention provides a monitoring and control device for a hydroelectric power plant which can continue operation as much as possible even when an abnormality occurs in the turbine generator and can respond to the load demand of the system as much as possible as a whole system. The purpose is to provide.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, each turbine generator is monitored for abnormality of the turbine generator, and when an abnormality is detected, the abnormality is ranked. An abnormality monitoring unit that outputs an abnormal signal, and a local area network interconnecting the abnormality monitoring unit and the automatic control unit, and when the abnormality monitoring unit detects an abnormality of the turbine generator to be monitored, The abnormality monitoring means transmits an abnormality signal to the automatic control means of the turbine generator via the local area network, and the automatic control means having received the abnormality signal needs to perform an emergency stop by referring to the rank of the abnormality. When it is determined that there is no abnormal condition, the operation is continued with the output limited without stopping the turbine generator.

According to a second aspect of the present invention, in the monitoring and control device for a hydroelectric power plant according to the first aspect, the automatic control means of the sound turbine generator is transmitted to another turbine generator via a local area network. Monitoring of a hydroelectric power plant characterized by referring to an abnormal signal from the hydraulic turbine generator and sharing the reduced output caused by the output limitation of the abnormal turbine generator to the healthy turbine generator according to the rank of the abnormality. The gist is a control device.

According to a third aspect of the present invention, in the monitoring and control device for a hydroelectric power plant according to the second aspect, an abnormality occurs in a certain turbine generator on the local area network so as to respond to a load request from a system as much as possible. When a problem occurs, a total abnormality monitoring means for transmitting a load adjustment signal to another abnormality monitoring means of the water turbine generator is provided.

According to a fourth aspect of the present invention, in the monitoring and control device for a hydroelectric power plant according to the third aspect, a means for sending a failure signal to the comprehensive abnormality monitoring means via the local area network when the automatic control means fails. The integrated abnormality monitoring means is provided with an automatic control means for performing an automatic control function of the automatic control means which has failed when the failure signal is received.

According to a fifth aspect of the present invention, in the monitoring and control device for a hydroelectric power plant according to the third aspect, when the automatic control means corresponding to each turbine generator fails, a failure signal is transmitted to the local area network. The automatic control means of the other turbine generator having received the failure signal substitutes for the automatic control function of the failed automatic control means.

According to a sixth aspect of the present invention, in the control device for a hydroelectric power plant according to the second aspect, a value-added communication network interconnecting a plurality of hydroelectric power plants is provided. Equipped with regional comprehensive abnormality monitoring means that comprehensively monitors each hydropower station, and this regional comprehensive abnormality monitoring means provides a comprehensive view of each hydropower station when an abnormality occurs in any of the turbines. It is characterized in that a surrogate operation is performed between other healthy hydroelectric power plants so as to satisfy the load demand of the power plant as much as possible.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment of the Invention of Claim 1) FIG. 1 shows an embodiment of the invention of claim 1. In the control device of the hydroelectric power plant shown in FIG. 1, only the turbine generator 1 is shown as a representative of a plurality of turbine generators, and a monitoring control device 2 for monitoring and controlling the turbine generator 1 corresponding thereto is shown. Have been. Monitoring and control device 2
Is a monitoring sensor 3 for detecting a physical quantity for monitoring the turbine generator 1, an abnormality monitoring device 4 for receiving a detection output of the sensor 3 and judging an abnormality of the generator 1, An automatic control sensor 5 for performing control, and a sensor 5
An automatic control device 6 that receives the detection output of the automatic transmission and derives the operation amount for the automatic control, transmits the operation amount from the automatic control device 6 to the generator, obtains the detection output of the sensor 5, and requires an emergency stop. And a protection device 7 for urgently stopping the generator 1 when it is determined that there is an abnormality. The feature of the monitoring control device 2 is that the abnormality monitoring device 4 and the automatic control device 6 are connected to a local area network (LAN) 10, respectively.

In the monitoring control device 2 shown in FIG. 1, the sensor 3 constantly sends a detection output for detecting an abnormality of the turbine generator 1 to the abnormality monitoring device 4 during the operation of the turbine generator 1. Based on the input signal, the abnormality monitoring device 4 determines whether an abnormality has occurred in the turbine generator 1 and, if an abnormality has occurred, whether the emergency stop of the generator 1 is necessary to some extent. Then, the judgment result is output to the local area network 10 as a ranked abnormal signal. The automatic control device 6 and the protection device 7 are connected to the abnormality monitoring device 4 via the local area network 10, and when the content of the abnormality signal does not require the emergency stop of the turbine generator 1, the abnormality is detected. The operation of the turbine generator 1 is continued in a state where the output is limited so as to reduce the degree.
Thus, unnecessary emergency stop situations can be avoided. If the content of the abnormal signal requires an emergency stop, the protective device 7 is activated by the abnormal signal received via the automatic control device 6, and the water turbine generator 1 is stopped urgently.

FIG. 2 shows three turbine generators 1A, 1B, 1
9 shows an example of application to a hydroelectric power plant equipped with C. Monitoring and control devices 2A, 2B and 2C are provided for each of the turbine generators 1A, 1B and 1C, respectively, and the abnormality monitoring device 4, automatic control device 6 and protection device 7 of each of the monitoring and control devices 2A, 2B and 2C are respectively provided. It is connected to a local area network 10. Individual monitoring and control device 2
The internal configuration of A, 2B and 2C is the same as that of FIG.

In the monitoring and control apparatus shown in FIG. 2, if an abnormality occurs in the turbine generator 1A, the abnormality monitoring apparatus 4 detects the abnormality and the level of the abnormality through the sensor 3 in the monitoring and control apparatus 2A. Judgment is made and sent to the local area network 10 as an abnormal signal. If the abnormal level does not require the emergency stop of the turbine generator 1A, the automatic control device 6 in the monitoring and control device 2A that has received the abnormal signal via the local area network 10 causes the turbine generator 1A to be emergency. Without stopping, continue the operation with the output limited. If the abnormal level is such that an emergency stop is required, the monitoring control device 2
The protection device 7 in A operates to stop the turbine generator 1A in an emergency.

(Embodiment of the Invention of Claim 2) The external connection configuration of the apparatus of FIG. 3 is the same as that of FIG. FIG.
The feature of this device is that it performs the "proxy operation" described below. It is assumed that the abnormality monitoring device 4 in the monitoring control device 2A has detected that an abnormality has occurred in the turbine generator 1A. In this case, when the level of the abnormality does not require an emergency stop, the monitoring control device 2A that has received the abnormality signal via the local area network 10
The automatic control device 6 in the inside limits the output without urgently stopping the turbine generator 1A and continues the operation. In this embodiment, the abnormal signal generated in the monitoring and control device 2A is also transmitted to the other monitoring and control devices 2B and 2C via the local area network 10. Upon receiving this abnormality signal, the abnormality monitoring device 4 in the monitoring control devices 2B and 2C is connected to the monitoring control device 2 via the local area network 10.
A substitute operation signal is sent to the automatic control device 6 in B and 2C. The automatic control device 6 which has received the substitute operation signal outputs the corresponding water turbine generators 1B, 1C with the output limited.
Then, the alternate operation is performed by sharing the decrease in the output of the turbine generator 1A. When a similar abnormality occurs in the water turbine generators 1B and 1C, the water turbine generator having the abnormality limits the output in accordance with the above, and the other water turbine generators operate on behalf of the reduced output.

When an abnormality requiring an emergency stop occurs in the turbine generator 1A, the abnormality is monitored from the abnormality monitoring device 4 in the monitoring control device 2A via the local area network 10 and the automatic control device 6 in the monitoring control device 2A. Monitoring and control device 2A
An abnormal signal is sent to the protection device 7 in the
The emergency stop of the turbine generator 1A is performed. The abnormality signal from the monitoring control device 2A is also transmitted to the abnormality monitoring device 4 in the other monitoring control devices 2B and 2C. The abnormality monitoring device 4 in the monitoring and control devices 2B and 2C that has received the abnormality signal performs the proxy operation signal via the local area network 10 via the local area network 10 in order to substitute for the output decrease of the water turbine generator 1A. , 2C, and causes the turbine generators 1B, 1C to perform a substitute operation within the range of the capacity.

(Embodiment of the Invention of Claim 3) The apparatus of FIG. 4 is compared with the apparatus of FIG. 3 so that the local area network 10 comprehensively monitors each turbine generator 1A, 1B, 1C. The feature is that the abnormality monitoring device 11 is connected. As shown in FIG. 5, the comprehensive abnormality monitoring device 11 performs comprehensive abnormality monitoring between the respective turbine generators in consideration of the load requirements of the respective turbine generators 1A, 1B, and 1C, and as a result, from the system side. In order to respond as much as possible to the load requirements of the above, the output sharing control among the turbine generators is performed.

If the abnormality monitoring device 4 of the monitoring and control device 2A detects that an abnormality has occurred in the turbine generator 1A and that the abnormality is not enough to stop the generator emergency, an abnormality signal Is transmitted via the local area network 10 to the automatic control device 6 in the same monitoring and control device 2a, and the automatic control device 6 allows the turbine generator 1A to operate in an output-limited state without an emergency stop. To continue. At the same time, the abnormality signal is sent to the comprehensive abnormality monitoring device 1 via the local area network 10.
1 is also transmitted. The integrated abnormality monitoring device 11 determines the content of the abnormality based on the transmitted abnormality signal, and sends a load adjustment signal to the abnormality monitoring device 4 of the other monitoring control devices 2B and 2C via the local area network 10. Upon receiving the load adjustment signal, the abnormality monitoring device 4 of the monitoring control devices 2B and 2C sends a substitute operation signal to the corresponding automatic control device 6 via the local area network 10. Each of the automatic control devices 6 having received the substitute operation signal is the turbine generator 1.
In order to allow the turbine generators 1B and 1C to share the required load amount that A has borne within a possible range, an output limit is added to perform the surrogate operation.

When the occurrence of an abnormality requiring an emergency stop is detected by a certain monitoring and control device, for example, the monitoring and control device 2A, a response is made based on an abnormality signal transmitted via the local area network 10. The protection device 7 operates to stop the corresponding water turbine generator 1A in an emergency. At the same time, the abnormal signal is sent to the local area network 10
Is also transmitted to the general abnormality monitoring device 11 via the same manner as in the above case. The integrated abnormality monitoring device 11 recognizes that the content of the abnormality requires an emergency stop based on the transmitted abnormality signal, and the other monitoring control device 2
A load adjustment signal is sent to the abnormality monitoring devices 4 of B and 2C via the local area network 10, and the monitoring control device 2
A substitute operation signal is transmitted to the automatic control devices 6 of B and 2C.
The automatic control device 6 that has received the substitute operation signal operates the turbine generator 1.
An output limit is applied so that the water turbine generators 1B and 1C share the required load amount that A has borne within a possible range, and the surrogate operation is performed.

(Embodiment of Claim 4) As shown in FIG. 6, each monitoring control device 2
A spare automatic control device 12 equivalent to the automatic control device 6 in A to 2C is additionally provided. The other components are the same as those in FIG. 4 or FIG. The operation of the apparatus shown in FIG. 6 when an abnormality occurs on the turbine generator side is no different from that described in the third embodiment. The feature of this embodiment lies in a countermeasure in the event that a failure occurs in the automatic control device, which is the central entity in each of the monitoring control devices 2A to 2C. Here, it is assumed that a failure has occurred in the automatic control device 6 in the monitoring control device 2A. When the automatic control device 6 in the monitoring control device 2A fails, a failure signal is first sent to the abnormality monitoring device 4 in the monitoring control device 2A via the local area network 10. Upon receiving the failure signal, the abnormality monitoring device 4 sends the failure signal to the general abnormality monitoring device 11 via the local area network 10. Upon receiving the failure signal, the integrated abnormality monitoring device 11 changes the function of the automatic control device 6 in the monitoring control device 2A to the integrated abnormality monitoring device 1A.
1 is made to act on behalf of the automatic control device 12 incorporated therein. In this case, the automatic control device 12 built in the comprehensive abnormality monitor 11 sends a control signal to the monitoring and control device 2A via the local area network 10, and controls the water turbine generator 1A in place of the failed automatic control device 6. Thus, the water turbine generator 1A can continue the steady operation despite the failure of the automatic control device 6 in the monitoring control device 2A. When the automatic control device 6 in the other monitoring control devices 2B and 2C fails, the automatic control device 12 similarly performs a substitute operation.

(Fifth Embodiment) In this embodiment, when any one of the monitoring control devices 2A to 2C, for example, the automatic control device 6 of the monitoring control device 2A fails, another failure occurs. The surrogate control operation is performed by the automatic control device 6 of the monitoring control devices 2B and 2C that are not performed. By doing so, it is possible to continue the operation in response to the load demand of the entire power plant.

In FIG. 6, when the automatic control device 6 of the monitoring control device 2A fails, a failure signal is transmitted to the corresponding abnormality monitoring device 4 via the local area network 10. The abnormality monitoring device 4 that has received the failure signal transmits the failure signal to the general abnormality monitoring device 11. Upon receiving the failure signal, the integrated abnormality monitoring device 11 sends a substitute operation request signal via the local area network 10 to one of the monitoring control devices 2B or 2C having a sound automatic control device, for example, the monitoring control device 2C.

The abnormality monitoring device 4 of the monitoring control device 2C that has received the proxy operation request signal sends a proxy signal to the automatic control device 6 in the monitoring control device 2C. The automatic control device 6 in the supervisory control device 2C that has received the proxy signal transmits the proxy control signal via the local area network 10 to the supervisory control device 2C.
A and the operation of the turbine generator 1A can be continued.

(Embodiment of Invention of Claim 6) This embodiment, as shown in FIG.
0B,... (Only two power plants 20A and 20B are shown in the figure) connect the abnormality monitoring device 4 and the automatic control device 6 in each monitoring control device in each power plant by the local area network 10, respectively. Each power station is connected to a higher-order value-added communication network (VAN) 30, which is connected to a regional integrated abnormality monitoring device 31. It is a matter of course that control in a normal state in each of the power plants 20A and 20B is performed for each generator in each power plant. When an abnormality occurs in any of the turbines in any of the power plants, the regional comprehensive abnormality monitoring device 31 satisfies the load demands from the grid as comprehensively as possible between the respective power plants. Such a substitute operation is performed. Therefore, according to this embodiment, it is possible to satisfactorily respond to a load request for a wide area.

[0029]

According to the present invention, in the case where an abnormality occurs in the turbine generator but it is not enough to stop the generator through the protection device, the output of each turbine generator is limited by limiting the output. The operation can be continued without stopping each turbine generator of each hydropower station.

Further, by linking monitoring and control devices for each turbine generator via a local area network, the reliability can be improved without duplicating the automatic control device, and the equipment can be reduced in size and cost. Can be achieved.

By interconnecting the hydropower stations in a wider area by a value-added communication network, it is possible to satisfactorily respond to the load demand of each turbine generator or each hydropower station even in the event of an abnormal situation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic system configuration of a monitoring and control device for a hydroelectric power plant according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration of a monitoring and control device for a hydroelectric power plant according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a flow of signals when an abnormality is detected in the monitoring and control device of the hydroelectric power plant according to the second embodiment of the present invention.

FIG. 4 is a block diagram showing a system configuration of a monitoring and control device of a hydroelectric power plant according to third, fourth, and fifth embodiments of the present invention.

FIG. 5 is an explanatory diagram showing a signal flow when an abnormality is detected by the monitoring and control device of the hydroelectric power plant according to the third embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a signal flow when an abnormality is detected in the monitoring and control device of the hydroelectric power plant according to the fourth and fifth embodiments of the present invention.

FIG. 7 is a block diagram showing a system configuration of a monitoring and control device for a hydroelectric power plant according to a sixth embodiment of the present invention.

FIG. 8 is a block diagram showing a system configuration of a conventional monitoring and control device for a hydroelectric power plant.

FIG. 9 is a block diagram showing a different system configuration of a conventional monitoring and control device for a hydroelectric power plant.

FIG. 10 is an explanatory diagram showing a signal flow at the time of detecting an abnormality in a conventional monitoring and control device for a hydroelectric power plant.

[Explanation of symbols]

 1, 1A, 1B, 1C Turbine generator 2, 2A, 2B, 2C Monitoring and control device 3 Sensor 4 Fault monitoring device 5 Sensor 6 Automatic control device 7 Protective device 10 Local area network (LAN) 11 General fault monitoring device 12 Automatic control Equipment 20A, 20B Hydroelectric power plant 30 Value-added communication network (VAN) 31 Regional comprehensive abnormality monitoring device

Claims (6)

[Claims] 1. A monitoring and control device for a hydroelectric power plant, comprising a plurality of turbine generators, each of which is provided with an automatic control means and a protection means for each of the turbine generators. Abnormality monitoring means for monitoring abnormality of the machine and outputting an abnormality signal that ranks the abnormality when an abnormality is detected; and a local area network interconnecting the abnormality monitoring means and the automatic control means. When the abnormality monitoring means detects an abnormality of the turbine generator to be monitored, the abnormality monitoring means transmits the abnormality signal to the automatic control means of the turbine generator via the local area network, and The automatic control means, having received the signal, refers to the rank of the abnormality and, when determining that the abnormality does not require an emergency stop, stops the turbine generator. Monitoring and control device for hydroelectric power plants, characterized in that operation is continued by adding Rukoto without output restrictions. 2. An automatic control means for a sound turbine generator refers to an abnormal signal from another turbine generator transmitted through the local area network, and limits the output of the abnormal turbine generator. 2. The monitoring and control device for a hydroelectric power plant according to claim 1, wherein a reduction in output caused by the above is assigned to the sound turbine generator according to the rank. 3. 3. In order to respond as much as possible to a load request from a system on the local area network, when an abnormality occurs in a certain turbine generator, load is applied to abnormality monitoring means of another healthy turbine generator. 3. The monitoring and control device for a hydroelectric power plant according to claim 2, further comprising an integrated abnormality monitoring means for transmitting an adjustment signal. 4. The apparatus according to claim 1, further comprising: means for transmitting a failure signal to said general abnormality monitoring means via said local area network when said automatic control means has failed, said general failure monitoring means having failed when receiving said failure signal. 4. The monitoring and control device for a hydroelectric power plant according to claim 3, further comprising an automatic control unit that performs an automatic control function of the automatic control unit. 5. An automatic control means for another turbine generator which receives a failure signal when said automatic control means corresponding to each turbine generator is out of order. 4. The device according to claim 3, wherein the device performs an automatic control function of the failed automatic control means.
2. The monitoring and control device for a hydroelectric power plant according to claim 1. 6. A value-added communication network for interconnecting a plurality of hydroelectric power stations with each other, and the value-added communication network is provided with an integrated regional abnormality monitoring means for comprehensively monitoring each of the hydroelectric power stations. The regional comprehensive abnormality monitoring means is to monitor the total load between the hydropower stations in order to satisfy the load demand from the system as much as possible when one of the turbines fails. 3. The monitoring and control device for a hydroelectric power plant according to claim 2, wherein the surrogate operation is performed.