JP2013151891A - Influx type power generation control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promptly and properly control various facilities of a water wheel or a generator by reducing the labor of person(s) or the like on watch in case the water wheel or generator goes in failure.SOLUTION: An influx type power generation control system includes a generator monitor/control device 2 to monitor the condition of a power generation device 101, a water level gauge 42 to monitor the water level of a reregulating reservoir type dam 111, and a central monitor/control device 5 which shuts an inlet valve 104 when any failure in the power generation device 101 is sensed by the generator monitor/control device 2, and shuts a water intake gate 112 in case the water level of the reregulating reservoir type dam 111 given by the water level gauge 42 is lower than the prescribed value.

Description

  The present invention relates to a flow-in type power generation control system that controls a water intake gate or the like when a water turbine or a generator breaks down during flow-in type power generation.

  In inflow (self-current) power generation that draws in water from a river as it is and generates power, such as a turbine or generator, the power generator is automatically stopped and water is discharged from the spill pipe of the aquarium. In addition, when it takes a long time to recover from a failure, the intake gate of the reverse adjustment pond dam on the upstream side is adjusted based on the knowledge and experience of the duty staff, and if necessary, By adjusting the output of the generator on the upstream side, the ineffective overflow from the reverse adjustment pond dam is prevented. Furthermore, depending on the water system, when the water level of the reverse adjustment pond dam is high, the operation of the upstream generator can be adjusted or restricted, or overflow (discharge) from the reverse adjustment pond dam can be started. Must.

  On the other hand, forecast the inflow, create a power generation plan schedule based on this prediction, and compare it with the power generation operation schedule that has already been registered and operated. By doing so, the technique of preventing the overflow of a regulation pond is known (for example, refer patent document 1).

Japanese Patent Laid-Open No. 10-030546

  However, the adjustment of the intake gate as described above and the adjustment of the generator output on the upstream side are based on the experience of the staff on duty, despite the need for complicated and complicated judgments. Not only did the control vary, it took a lot of labor and time. On the other hand, even when water turbines and generators break down, the water for power generation is used effectively, and the specified water flow rate (maintenance flow rate: maintenance of various functions of rivers such as boating, fishing, landscapes, protection of animals and plants) Necessary flow rate) must be secured. On the other hand, in the technique of Patent Document 1, water is discharged from the spillage pipe when a generator or the like fails, and a large amount of water for power generation is wasted when it takes a long time to recover from the failure. .

  Accordingly, an object of the present invention is to provide a flow-in type power generation control system capable of quickly and appropriately controlling each facility by reducing labor such as a shift worker when a water turbine or a generator breaks down. And

  In order to solve the above-mentioned problems, the invention of claim 1 is directed to the reverse adjustment pond type dam water flowing into the water tank through the intake gate, and the water in the water tank flowing into the power generator through the inlet valve. In addition, in the inflow type power generation in which water overflowing from the water tank is discharged into a water discharge channel through a spillway, the inflow type power generation control system controls each facility such as the intake gate and the inlet valve, The power generation monitoring means for monitoring the state of the power generation apparatus, the water level monitoring means for monitoring the water level of the reverse adjustment pond dam, and the inlet valve is closed when a failure of the power generation apparatus is detected by the power generation monitoring means And a control means for closing the intake gate when the water level of the reverse adjustment pond dam by the water level monitoring means is lower than a predetermined value.

  According to this invention, the state of the power generator is monitored by the power generation monitoring means, and the water level of the reverse adjustment pond dam is monitored by the water level monitoring means. When the power generation monitoring unit detects a failure of the power generation device, the control unit closes the inlet valve, thereby stopping the power generation by the power generation device. In addition, when the water level of the reverse adjustment pond dam is lower than the predetermined value, that is, when there is remaining capacity in the reverse adjustment pond dam, the intake gate is closed by the control means, and the reverse adjustment pond dam is transferred to the tank. Water flow is stopped.

  According to a second aspect of the present invention, in the inflow power generation control system according to the first aspect, the control means is located upstream of the reverse adjustment pond dam so as to suppress overflow from the reverse adjustment pond dam. The operation of the power generator on the side is controlled.

  According to the first aspect of the present invention, when the power generation device breaks down, the inlet valve is closed, and when there is remaining capacity in the reverse adjustment pond type dam, the water flow from the reverse adjustment pond type dam is stopped. For this reason, the amount of water discharged from the water tank through the spillage pipe is reduced, it is possible to effectively use the water for power generation, and it is possible to extend the life and extend the life by suppressing the deterioration of the spillage pipe. It becomes. Moreover, because the power generation monitoring means and the water level monitoring means monitor the state of the power generator and the water level of the reverse adjustment pond dam, and the automatic control is performed by the control means based on the monitoring results, labor such as duty personnel Can be reduced and each facility can be controlled promptly and appropriately.

  According to the invention of claim 2, since the operation (start, stop, output adjustment) of the upstream power generator is controlled so as to suppress the overflow from the reverse adjustment pond dam, the reverse adjustment pond dam The water flow from the water tank to the water tank is suppressed, and the amount of water discharged through the spill pipe is also reduced. As a result, the water for power generation can be used more effectively and the life of the spill pipe can be extended.

It is a schematic block diagram which shows the example of application of the inflow type electric power generation control system which concerns on embodiment of this invention. It is a figure which shows the continuation of FIG. It is a schematic diagram showing an example of a water system. It is a flowchart which shows the effect | action of the system of FIG.

  The present invention will be described below based on the illustrated embodiments.

  1 and 2 are schematic configuration diagrams showing an application example of the inflow type power generation control system 1 according to the embodiment of the present invention, with the first reverse adjustment pond type dam 111 as a boundary (overlapping illustration). It is divided into two diagrams. Here, first, a flow-type power generation facility and a water system to which the system 1 is applied will be described.

  FIG. 3 is a schematic diagram showing an example of a water system, where the upper side in the figure is the upstream side, the lower side in the figure is the downstream side, and a plurality of dams D1 to D5 are provided on the water channel, and each dam D1 to D5 is provided. Power plants G1 to G5 are provided correspondingly. In this water system, the water from the second dam D2 flows to the first dam D1 to the third dam D3, and the water from the fifth dam D5 flows to the fourth dam D4. It reaches the third dam D3. The second river R2 flows between the second dam D2 and the first dam D1, and the first river R1 flows between the first dam D1 and the third dam D3. It is assumed that the third river R3 flows from the third dam D3. In addition, each dam D1 to D5 has a mechanism for discharging it as a maintenance flow rate directly below the dam (such as a sand discharge gate) and flowing into the downstream dam through the river. Here, in this embodiment, an aqueous system indicated by a broken line in the figure will be mainly described.

  Reference numeral 101 in FIG. 1 denotes a first power generation device installed in the first power plant G1, and includes a water turbine, a generator, and the like. The first power generation apparatus 101 is connected to the upstream water tank 102 via the iron pipe 103, and the water in the water tank 102 flows into the first power generation apparatus 101 via the iron pipe 103 and the first inlet valve 104. As a result, electric power is generated and flows out into the first water discharge channel 105. Further, the water tank 102 is connected to the first water discharge channel 105 through the spill pipe 106, and water overflowing from the water tank 102 is discharged into the first water discharge channel 105 through the spill pipe 106. Yes.

  A first reverse adjustment pond type dam 111 (D1) is provided on the upstream side of the water tank 102 so that water in the dam 111 flows into the water tank 102 via the intake gate 112 and the first water channel 121. It has become. Furthermore, from the upper edge of the dam 113 of the 1st reverse adjustment pond type dam 111, the water overflowing from the 1st reverse adjustment pond type dam 111 flows into the 1st river R1. Further, the intake gate 112 can be freely opened and closed by a first motor 114.

  A second power generation device 131 is installed in the second power plant G2 upstream of the first reverse adjustment pond type dam 111. The second power generation device 131 is connected to the upstream second reverse adjustment pond type dam 141 (D2), and water from the second reverse adjustment pond type dam 141 passes through the second inlet valve 132. It flows in and flows from the second water discharge channel 133 toward the first reverse adjustment pond dam 111 side.

  In addition, the second reverse adjustment pond type dam 141, like the first reverse adjustment pond type dam 111, is such that the water overflowing from the upper edge of the dam 142 flows into the second river R2. The intake gate 143 can be opened and closed by the second motor 144.

  In such a flow-type power generation facility and water system, a flow-type power generation control system 1 that controls each facility / device when the first power generation device 101 fails is provided. The system 1 mainly includes generator monitoring control devices (power generation monitoring means) 2 and 3, water level meters (water level monitoring means) 41 and 42, and a central monitoring control device (control means) 5.

  The first generator monitoring control device 2 is a device that monitors the state of the first power generation device 101 and controls the first power generation device 101, and is communicably connected to the central monitoring control device 5. . Specifically, when a failure such as a water turbine or a generator is detected, the detection result is transmitted to the central monitoring control device 5, and the second inlet valve 132 is closed based on a command from the central monitoring control device 5. The second power generator 131 is stopped. The second power generator monitoring and control device 3 is a device that monitors and controls the second power generating device 131 and has the same configuration as that of the first power generator monitoring and control device 2. Here, the same power generator monitoring control device is also installed in other power plants, and each power generating device can be monitored and controlled by the central monitoring control device 5.

  The first water level meter 41 is a meter that measures and monitors the water level of the water tank 102, and the measurement result is transmitted to the central monitoring control device 5 in real time. Similarly, the second water level gauge 42 is a meter that measures and monitors the water level of the first reverse adjustment pond dam 111, and the measurement result is transmitted to the central monitoring control device 5 in real time. Yes. Here, other dams and aquariums including the second reverse adjustment pond type dam 141 are also provided with the same water level gauge so that the central monitoring control device 5 can monitor the water level of each dam in real time. Yes.

  In addition, flow meters (not shown) are disposed in water channels such as the first water channel 121 and the second water discharge channel 133, and the measurement results from the respective flow meters are transmitted to the central monitoring control device 5 in real time. It is like that.

  The central supervisory control device 5 is set in a large-scale control station, and maintains a flow rate determined at the outlet of the power plant G5 using power generation water from the third dam D3 at the most downstream side. The amount of water used is adjusted and maintained by dam gate discharge. For this reason, when the generator cannot be operated due to an accident or the like, the amount of water used for generation and the flow rate / arrival time are controlled and monitored efficiently and quickly by the integrated water system operation. Specifically, the power generators 101 and 131, the intake gate 112, and the like are controlled based on the monitoring results of the generator monitoring control devices 2 and 3 and the measurement results of the water level gauges 41 and 42. . Here, the first motor 114 and the second motor 144 are communicably connected to the central monitoring control device 5 and controlled by the central monitoring control device 5 so that the intake gates 112 and 143 are opened and closed. A case where the first power generation apparatus 101 has failed will be mainly described.

  That is, when a failure of the first power generation device 101 is detected by the first generator monitoring control device 2, the first inlet valve 104 is closed and the water level of the first reverse adjustment pond dam 111 is set to a predetermined level. If lower than the value, the first intake gate 112 is closed. Further, the second power generation device 131 on the upstream side of the first reverse adjustment pond type dam 111 or the like so as to suppress the overflow from the first reverse adjustment pond type dam 111, that is, the overflow from the water tank 102. Control of operation (start, stop, output adjustment). Further, the operation of the second power generator 131 and the like is controlled so that a predetermined flow rate (maintenance flow rate / responsible discharge flow rate) of water flows through the first river R1 and the second river R2. Specific control / processing contents will be described together with the following actions.

  Next, the operation of the inflow power generation control system 1 having such a configuration will be described with reference to FIG. Here, the single-line chart symbol (frame) in FIG. 4 indicates the contents of control and processing by the central supervisory control device 5, and the double-line chart symbol in FIG. 4 indicates the movement of each facility, work by personnel, etc. Show.

  First, the states of the power generators 101 and 131 are monitored by the generator monitoring control devices 2 and 3, and the water levels of the water tank 102 and the first reverse adjustment pond dam 111 are monitored by the water level meters 41 and 42. Then, when a failure of the first power generation device 101 is detected by the first generator monitoring control device 2, the detection result is transmitted to the central monitoring control device 5, and the first generator monitoring control device 2 A command to close the first inlet valve 104 is transmitted (step S1). Thereby, the first inlet valve 104 is fully closed, the first power generation apparatus 101 is stopped, and when the water level of the water tank 102 becomes a predetermined value or more, the water overflowing from the water tank 102 passes through the spill pipe 106. Then, the water is discharged into the first water discharge channel 105 (step S2).

  Next, it is determined whether the first reverse adjustment pond type dam 111 has a surplus capacity (step S3). That is, it is determined whether or not the water level of the first reverse adjustment pond type dam 111 by the second water level gauge 42 is lower than a predetermined value and there is a capacity to store water. The first motor 114 is remotely controlled by the central monitoring control device 5 so as to fully close the intake gate 112 (step S4). Thereby, the water flow from the 1st reverse adjustment pond type dam 111 to the water tank 102 via the 1st intake gate 112 is interrupted | blocked, and the water from the 2nd power plant G2 side (upstream side) is 1st. Is stored in the reverse adjustment pond type dam 111.

  Subsequently, when there is no overflow from the dam 113 of the first reverse adjustment pond type dam 111 (in the case of “No” in step S5), the central monitoring control device via the second generator monitoring control device 3 5, the output of the second power generation device 131 is controlled to be reduced (step S6). That is, overflow from the first reverse adjustment pond type dam 111 is prevented and reduced, and water of a predetermined flow rate (maintenance flow rate / responsible discharge flow rate) flows through the first river R1 and the second river R2. In addition, the output of the second power generator 131 is controlled to be reduced.

  On the other hand, when there is overflow from the embankment 113 of the first reverse adjustment pond type dam 111 (in the case of “Yes” in step S5), first, the central monitoring control is performed via the second generator monitoring control device 3. Operation of the upstream power generator including the second power generator 131 is controlled by the device 5 (step S8). For example, the second inlet valve 132 of the second power generation device 131 is closed, and the operation of the second power generation device 131 is stopped. Next, after the tour warning (step S9) is performed, overflow from the embankment 113 starts (step S10), and the upstream power generation device including the second power generation device 131 is controlled (step S11). ). At this time, based on the measurement results by each flow meter, a predetermined flow rate (maintenance flow rate / responsible discharge flow rate) of water flows through the first river R1 and the second river R2, and the first reverse adjustment pond dam In order to suppress and reduce overflow from the 111 (water tank 102) as much as possible, the output of the upstream power generator is controlled to be reduced, stopped, or restarted.

  Then, after step S6 and step S11, a recovery measure for the failed first power generation device 101 is performed (step S7), and the upstream power generation device and the like are controlled for operation as necessary. That is, the operation of the power generator such as the second power generator 131 (second inlet valve 132) is controlled so that the maintenance flow rate is ensured in each water channel and the overflow from the water tank 102 can be suppressed and reduced as much as possible. At the same time, the intake gates such as the intake gates 112 and 143 are controlled to open and close as necessary.

  Here, also in steps S6, S8, and S11, the intake gates such as the intake gates 112 and 143 are controlled to open and close as necessary (to ensure the maintenance flow rate and suppress the overflow from the water tank 102). Is done. Further, in order to secure the maintenance flow rate and suppress the overflow from the water tank 102, depending on the capacity of the water system and each reverse adjustment pond type dam, the water level, the flow rate of each water channel, etc. The power generation device 131 is stopped, and a predetermined flow rate (maintenance flow rate / responsible discharge flow rate) in the water discharge channel of the power plant G5 is secured by a water flow from another water channel / route. That is, based on the flow rate of each water channel in the entire water system, the water level of each reverse adjustment pond type dam, and the operating state of each power generation device, a maintenance flow rate is ensured and overflow (invalid overflow) from the water tank 102 is suppressed. In this way, each power generator, intake gate, and the like are controlled.

  As described above, according to this flow-in type power generation control system 1, when the first power generation device 101 breaks down, the first reverse adjustment pond type dam 111 has a surplus capacity in the first reverse adjustment pond type dam 111. The water flow from the dam 111 to the water tank 102 is interrupted. For this reason, the amount of water discharged from the water tank 102 through the spill pipe 106 is reduced, and the power generation water can be used effectively. That is, since water from the second power plant G2 side is stored in the first reverse adjustment pond dam 111, when the first power generation device 101 is restarted, the first reverse adjustment pond dam 111 Water can be used effectively. In addition, since the water flowing through the spill pipe 106 is reduced, it is possible to prevent the spill pipe 106 from deteriorating and prolong its life and extend its life.

  On the other hand, second upstream power generation is performed so that a predetermined flow rate (maintenance flow rate / responsible discharge flow rate) is ensured in the first river R1 and the second river R2, and overflow from the water tank 102 is suppressed. The device 131 and the intake gates 112 and 143 are controlled. As a result, while ensuring the maintenance flow rate, the water for power generation can be used more effectively, and the life of the spill pipe 106 can be further extended.

  In addition, the state of each power generator 101, 131, the water level of each reverse adjustment pond dam 111, 141, the flow rate of each water channel, etc. are automatically monitored in real time, and the above-described automatic control is performed based on the monitoring results. Done. For this reason, the labor of the shift staff and the like is reduced, and appropriate and quick control independent of human judgment is possible. Further, in a power generation facility in which the generator monitoring control devices 2 and 3 and the water level gauges 41 and 42 are already installed, this system can be obtained by simply adding the above control content / program to the central monitoring control device 5. 1 can be constructed.

  By the way, the most upstream is usually a pressure dam (high dam), which is composed of a dam with a large capacity of water storage capacity, a pressure tunnel, and an iron pipe, and guides water for power generation to the generator. In this case, the intake gate is always fully open, and adjustment and control at the time of generator failure is performed by the inlet valve, so it does not directly lead to invalid discharge.

  On the other hand, the flow-in dam and the reverse adjustment dam in this embodiment are installed downstream from the pressure dam, have only a small capacity of water storage capacity, overflow in several hours, and become invalid discharge.

  Depending on the water system, when it consists of two left and right systems as shown in FIG. 3, the main flow is generated when the generator failure in the middle area is handled because the maintenance flow rate is monitored by the discharge channel of the most downstream power plant G5. By controlling with the control system 1, a water system can be switched temporarily etc., and quick and efficient operation can be performed.

  When securing the maintenance flow rate through the river, it is necessary to consider the time to reach the dam in the downstream area through the general river. Therefore, the maintenance can be maintained by increasing the number of generators in a short time by changing the water system. Securing the flow rate is effective.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, only the water from the first reverse adjustment pond dam 111 flows through the first water channel 121, but the water from the plurality of reverse adjustment pond dams flows. The same can be applied to the water system, and in this case, control is also performed based on the water level of each reverse adjustment pond dam, the flow rate of each water channel, and the like.

1 Flow-in type power generation control system 2, 3 Generator monitoring and control device (power generation monitoring means)
41, 42 Water level gauge (water level monitoring means)
5 Central monitoring and control device (control means)
101 First power generator (power generator)
102 Water tank 103 Iron pipe 104 First inlet valve (inlet valve)
105 First spillway (spillway)
106 Spill pipe 111 First reverse adjustment pond type dam (reverse adjustment pond type dam)
112 First intake gate (intake gate)
131 Second power generation device (upstream power generation device)
141 Second Reverse Adjustment Pond Dam

Claims (2)

Water from the reverse adjustment pond dam flows into the water tank through the intake gate, water in the water tank flows into the power generation device through the inlet valve, and water overflowing from the water tank is discharged through the spillway. In the inflow type power generation discharged into the water channel, the inflow type power generation control system for controlling each facility such as the intake gate and the inlet valve,
Power generation monitoring means for monitoring the state of the power generation device;
Water level monitoring means for monitoring the water level of the reverse adjustment pond dam,
When the power generation monitoring unit detects a failure of the power generation device, the inlet valve is closed, and when the water level of the reverse adjustment pond dam by the water level monitoring unit is lower than a predetermined value, the intake port Control means for closing the gate;
A flow-through power generation control system comprising: The control means controls the operation of the power generator upstream of the reverse adjustment pond dam so as to suppress overflow from the reverse adjustment pond dam.
The inflow power generation control system according to claim 1.

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