JPH09288192A - Internal pump control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move to an automatic mode even when considerable numbers of interval pumps are not on operation. SOLUTION: An output control part 9 has the input of a load requirement deviation signal E, forming a flow rate-setting signal F. A core flow rate- calculating part 15 has the input of a local core flow rate signal P and calculates a core flow rate signal G. A flow rate control part 10 forms a speed command signal K so as to make zero a difference between the flow rate-setting signal F and core flow rate signal G. A gang speed control part 11 uses the speed command signal K as a gang speed command signal L in an automatic mode and outputs the set signal of a manual gang speed-setting device as the gang speed command signal L. An automatic control permission-judging part 16 moves the apparatus to the automatic mode when an automatic control permission signal is formed by a core output signal O and a control signal Q from an individual speed control part 12.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an internal pump control device for controlling an internal pump of a nuclear power plant.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG.
In the figure, a plurality of internal pumps 2 and a plurality of core flow rate detectors 3 are arranged in a nuclear reactor 1.
First, fuel reacts in the reactor 1, water in the reactor 1 boils, steam is generated, and the main steam A is sent to the turbine 4.
The turbine inlet pressure signal B, which is the pressure of steam, is an electrohydraulic controller (EHC: Ele) that is a steam turbine controller.
ctro Hydraulic Control Sy
Stem) 5 is input. The electro-hydraulic control device 5 creates a pressure controller output signal C corresponding to the actual reactor output based on the turbine inlet pressure signal B, and generates an automatic output adjusting device (APR: Automatic Power Reg).
ulator) 7 is output.

The turbine 4 is rotated by the main steam A to rotate a generator 6 connected to the turbine 4. In the automatic output adjusting device 7, the pressure controller output signal C and the generator output signal D indicating the generated electric quantity are input, and the generator output signal D
Creates the load request deviation signal E so that the target generator output is set in the automatic output adjustment device 7, and outputs it to the internal pump control device 8.

The internal pump controller 8 comprises an output controller 9, a flow controller 10, a gang speed controller 11 and an individual speed controller 12. The output control unit 9 inputs the load request deviation signal E, calculates a deviation based on the load request deviation signal E, and creates a flow rate setting signal F. The flow rate setting signal F is output to the flow rate control unit 10. Flow controller 10
The internal flow rate setting device 10A creates a flow rate setting signal H based on the flow rate setting signal F input from the output control unit 9.

Then, the flow rate control unit 10 obtains a flow rate deviation signal J, which is a difference between the flow rate setting signal H and the core flow rate signal G from the core flow rate detector 3 installed in the reactor 1, and the deviation calculation unit 1
Output to 0B. The deviation calculator 10B calculates so that the input flow rate deviation signal J becomes zero, and creates a speed command signal K. The speed command signal K is sent to the gang speed control unit 1
The gang speed command signal L is generated based on the speed command signal K output from the gang speed controller 11A in the gang speed control unit 11.

The created gang speed command signal L is output from the gang speed control unit 11 to each individual speed control unit 12. Individual speed setting unit 12A in the individual speed control unit 12
Then, an internal pump speed request signal M is created from the gang speed command signal L input from the gang speed control unit 11 and output to the variable frequency power supply device (RIP-ASD) 13 which is the power supply device of the internal pump 2. The variable frequency power supply device 13 supplies the variable frequency power supply N to the internal pump 2 to control the speed of the internal pump 2.

By the way, the gang speed control unit 11 and the individual speed control unit 12 are as shown in FIG.
That is, the gang speed control unit 11 has a higher-order automatic mode and a manual mode, and when in the higher-order manual mode, the gang speed command signal L is sent to the individual speed control unit 12 by manual setting by the gang speed manual setter 11a. On the other hand, in the higher automatic mode, the speed command signal K from the flow rate control unit 10 is output to the individual speed control unit 12 as the gang speed command signal L only when the automatic permission signal R is input from the automatic injection unit 22. It has become so.

Each individual speed control unit 12 has an individual automatic mode and a manual mode. In the individual automatic mode, the gang speed command signal L from the gang speed control unit 11 is used as it is for the internal pump speed request. The output signal from the manual setting unit 12b is output as the internal pump speed request signal M in the individual manual mode when the individual manual mode is output, and the operator arbitrarily outputs each of the plurality of individual speed control units 12. The rotation speed of the internal pump 2 can be individually changed manually.

[0009]

However, as shown in FIG.
Also, the conventional internal pump control device 8 as shown in FIG. 24 has the following problems in controlling the internal pump 2 according to the operating condition.

First, in the gang speed control section 11 shown in FIGS. 23 and 24, the gang speed control section 11 must be in the automatic mode when a predetermined number of individual speed control sections 12, for example, 9 units, are not in the individual automatic mode. There was a problem that it was not possible to switch to the higher-order automatic mode of 11. That is, unless nine or more internal pumps 2 are uniformly closed-loop controllable, automatic control by the speed command signal K from the host cannot be performed, and when the furnace output is low, the host manual mode must be used. I had to do complicated operations without getting it.

Secondly, a certain internal pump 2
When there was a trip, there was a problem that the core flow rate declined and fluctuated, and the core flow rate distribution became uneven.

Thirdly, since the internal pump 2 that has been stopped has to be restarted manually, it has been troublesome.

Therefore, an object of the present invention is to provide an internal pump control device capable of performing optimum control according to the operating conditions such as the number of operating units, core flow rate, discharge flow rate and the like.

[0014]

According to a first aspect of the present invention, an output control for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output. Section, a flow rate control section that outputs a speed command signal obtained by calculating so that the core flow rate signal input from the core flow rate sensor becomes a flow rate setting signal, and a speed command signal is output when a permission signal to the automatic mode is input. A gang speed control unit that outputs a gang speed command signal, and a gang speed command signal that is provided for each of a plurality of internal pumps and inputs a gang speed command signal to generate a speed request signal and output it to the variable frequency power supply device. In an internal pump control device comprising an individual speed control unit capable of outputting a manual signal to a variable frequency power supply device,
An automatic injection permission determination unit that outputs a permission signal to the automatic mode based on the number of operating internal pumps required to secure the reactor output and the operating condition of the individual speed control unit is provided. By this means, when there is an automatic injection command, when the furnace output signal and the number of internal pumps required to secure this furnace output are less than or equal to the number of internal pumps currently in operation, the permission signal to the automatic mode is the gang speed. It is output to the control unit and shifts to automatic mode. As a result,
It is possible to operate the internal pumps in the automatic mode according to the reactor power status, and it is possible to operate a small number of internal pumps in the automatic mode even when the reactor power is low. Therefore, unlike the conventional case, the automatic mode operation cannot be performed unless the number is a predetermined number or more, and the automatic mode operation can be performed with the operating number according to the furnace output condition.

According to a second aspect of the present invention, an output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device having an individual speed control unit capable of outputting to a power supply device, a gear output from the gang speed control unit is used. The gain multiplication unit that outputs the gang speed command signal obtained by multiplying the gang speed command signal by a predetermined gain to the individual speed control unit, and the operating status of the individual speed control unit are taken in A gain adjusting unit that calculates a predetermined gain based on the number of operating vehicles after the null pump trip and outputs the gain to the gain multiplying unit is provided. By this means,
A predetermined gain is calculated based on the number of operating internal pumps before and after each trip, and the calculated predetermined gain is multiplied by the gang speed command signal, and the multiplied gang speed command signal is sent to the individual speed control unit. Is output. Therefore, the gang speed command signal is corrected according to the increase or decrease in the number of operating internal pumps, and the fluctuation of the core flow rate can be minimized.

According to a third aspect of the present invention, an output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device including an individual speed control unit capable of outputting to a power supply device, an individual predetermined gating command for the gang speed command signal is provided. Gain multipliers individually provided corresponding to the individual speed control units that output the gang speed signals obtained by multiplying the individual speed control units to the individual speed control units, the operating conditions of the individual speed control units, and predetermined internals. A gain adjusting unit that creates a predetermined gain for each internal pump based on the operation pattern of the pump and outputs the gain to each gain multiplying unit is provided. By this means, a gain for controlling each internal pump is created as an individual predetermined gain based on the current operating condition of the internal pump and a predetermined operating pattern of the internal pump, and each gang speed command is multiplied. Each internal pump is controlled based on the gang speed command signal. Therefore, the internal pumps are not operated uniformly at the same speed as in the past, but the internal pumps are controlled by individual predetermined gains, so that the core flow rate is made uniform and the non-uniformity of the core flow rate is minimized. Can be suppressed.

According to a fourth aspect of the present invention, an output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device including an individual speed control unit capable of outputting to a power supply device, an individual predetermined gating command for the gang speed command signal is provided. Flow rate obtained by calculating the core flow rate distribution from each core flow rate signal, and the gain multiplying section that is individually provided for the internal pump that outputs the individual gang speed signal obtained by multiplying A gain adjusting unit that creates each predetermined gain as an individual predetermined gain based on the distribution and outputs the gain to each gain multiplying unit is provided. By this means, a core flow rate distribution is obtained from each core flow rate signal, an individual predetermined gain for controlling each internal pump is obtained from this core flow rate distribution, and the gang speed command signal is corrected. Therefore, each internal pump does not simply rotate at the same speed as in the conventional case, and the speed of each internal pump can be increased or decreased according to the core flow rate distribution. It is possible to minimize the non-uniformity of the flow rate.

According to a fifth aspect of the present invention, an output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device equipped with an individual speed control unit that can output to the power supply device, A predetermined output control unit control constant and a predetermined flow rate control unit control constant are created in accordance with the number of operating units to be operated, and a gain adjusting unit for setting the output control unit and the flow rate control unit respectively is provided. . By this means, the predetermined control constants of the output control unit and the flow rate control unit are changed according to the number of operating internal pumps.
Therefore, since the internal pump is controlled by the optimum control constant, the response characteristics are improved and the core flow rate is controlled optimally.

According to a sixth aspect of the present invention, an output controller for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device equipped with an individual speed control unit capable of outputting to a power supply device, provided corresponding to each internal pump Based on each discharge flow rate signal acquired from the discharge flow rate sensor, it is determined whether the internal pump that is started is in the startable area, and if this determination is in the non-startable area, individual speed control other than the internal pump is started. While the internal pump speed reduction command signal is output to the unit, a discharge flow rate monitoring unit that outputs a start command to the variable frequency power supply device corresponding to the startable region is provided. By this means, it is determined whether or not the internal pump to be activated is in the startable region, and when the internal pump is in the non-startable region, the internal pump is once decelerated and the internal pump is started up in the startable region. Therefore, a high load is not applied to the activated internal pump, occurrence of a failure can be avoided, and the burden on the operator can be reduced because the internal pump is executed without human intervention.

According to a seventh aspect of the invention, an output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that the generator output based on the turbine inlet pressure signal becomes a target generator output, and a core flow rate sensor. The flow rate control unit outputs the speed command signal obtained by calculating so that the core flow rate signal input from the unit becomes the flow rate setting signal, and the speed command signal is output as the gang speed command signal when the permission signal to the automatic mode is input. A gang speed control unit and a plurality of internal pumps are provided respectively to input a gang speed command signal to create a speed request signal and output it to the variable frequency power supply device, while individually outputting a manual signal to the variable frequency In an internal pump control device equipped with an individual speed control unit capable of outputting to a power supply device, provided corresponding to each internal pump Each discharge flow rate signal from the discharge flow rate sensor is taken in, discharge flow rate distribution information is created, and it is judged from this information whether the internal pump to be started is in the non-startable area or the startable area. Corresponds by selecting the discharge flow rate monitoring unit that outputs a start command to the variable frequency power supply unit and the internal pump that decelerates the internal pump based on this information when the discharge flow rate distribution information is taken in the case of a non-startable area And an internal pump reduction command generating unit that outputs an internal pump reduction command signal to the individual speed control unit. By this means, it is determined whether or not the internal pump to be started is in the startable region, and when it is in the non-startable region, only the selected internal pump is decelerated once and becomes the startable region, the target internal pump is started. . Therefore, it is possible to start the reactor without reducing the core flow rate as much as possible rather than uniformly, so that it is possible to reliably start the engine at an early stage, and it is possible to avoid the occurrence of a failure without applying a high load to the starting internal pump. Moreover, since it is executed without human intervention, the burden on the operator can be reduced.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention. The same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the first embodiment of the present invention. The embodiment is provided with the automatic control permission determination unit 16, and even a small number of internal pumps 2 can be operated in the higher automatic mode according to the furnace output status. It is characterized in that it can be operated in a higher-level automatic mode.

Here, the automatic control permission judging section 16 calculates the number of operating internal pumps 2 required for securing the reactor output by taking in the reactor output signal O from the nuclear instrumentation system in the necessary individual automatic mode. Then, the required number of operating units calculated is less than or equal to the number of internal pumps 2 in operation in the individual automatic mode obtained from the operating condition of the individual speed control unit 12, and when the automatic closing command is input, the higher automatic It outputs a permission signal to the mode. The individual speed control unit 12 and the gang speed control unit 11 have the same configurations as those in FIG.

Next, the operation of the first embodiment of the present invention will be described with reference to FIGS.

First, the output control unit 9 of the internal pump control device 8A inputs the load request deviation signal E from the automatic output adjusting device 7 and creates the flow rate setting signal F. On the other hand, the core flow rate calculation unit 15 inputs the local core flow rate signal P from the core flow rate detector 3 installed in the reactor 1, and the core flow rate signal G
Is calculated. The flow rate control unit 10 creates the speed command signal K so that the difference between the flow rate setting signal F and the core flow rate signal G becomes zero.

The gang speed control unit 11 outputs the speed command signal K produced by the flow rate control unit 10 as the gang speed command signal L as it is in the higher automatic mode, while
In the higher manual mode, the gang speed manual setting device 11
The setting signal AA of a is output as the gang speed command signal L. The individual speed control unit 12 has the same configuration as that shown in FIG.

Here, when the gang speed control unit 11 is put into the higher automatic mode, the automatic control permission judgment unit 16 automatically judges by the furnace output signal O and the control signal Q inputted from the individual speed control unit 12. Control permission signal R
1 must be established.

The processing of the automatic control permission judging section 16 will be described with reference to FIGS. 2 and 3.

First, the automatic control permission determining unit 16 calculates the number of operating internal pumps 2 (for example, A units) in the individual automatic mode, which is necessary for maintaining the current furnace output, according to the furnace output signal O. (P1).

Then, the number (for example, B) of the internal pumps 2 in the individual automatic mode currently in operation is calculated from the automatic control signal Q input from each individual speed control section 12 (P2). Here, the current operating number (for example,
It is determined whether or not the number of internal pumps 2 (B) is equal to or greater than the number of internal pumps 2 required to secure the reactor output (for example, A), and the current operating number is required to secure the reactor output. If the number of internal pumps 2 is greater than or equal to the number, the output control / automatic control permission signal R1 is established (P4).

When the current number of operating internal pumps 2 is less than or equal to the number of internal pumps required to secure the furnace output, the automatic control permission signal R1 is not established (P
5). Next, the plurality of individual speed control units 12 create the internal pump speed request signal M based on the gang speed command signal L input from the gang speed control unit 11, and the internal pumps installed in the reactor 1 It outputs to the variable frequency power supply device 13 which supplies the variable frequency power supply N to 2.

As described above, according to the first embodiment of the present invention, the current internal pump 2 is more than the number of operating internal pumps 2 required to maintain the current furnace output by the automatic control permission determination unit 16. When the number of operating vehicles is large, the gang speed control unit 11 is activated when the output control / automatic control permission signal R1 is satisfied, and the gang speed control unit 11 issues an automatic closing command when the automatic closing permission condition R2 is satisfied.
Is the higher automatic mode. This enables output control and flow rate control even with a small number of operating units, for example, 9 or less.

FIG. 4 is a block diagram showing a second embodiment of the present invention. The same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the second embodiment of the present invention. In the embodiment, the gain adjusting unit 17 and the gain multiplying unit 18 are used.
And is characterized in that the gang speed command signal L is corrected according to the number of operating internal pumps 2 before and after the trip.

Here, the gain adjusting unit 17 takes in the operating status of the individual speed control unit 12, and calculates a predetermined gain based on the number of operating internal pumps 2 before the trip and the number of operating internal pumps after the trip. And outputs it to the gain multiplication unit 18. The gain multiplication unit 18 outputs a gang speed correction command signal S obtained by multiplying the gang speed command signal L output from the gang speed control unit 11 by a predetermined gain, to the individual speed control unit 12.

Next, the operation of the second embodiment of the present invention will be described with reference to FIG.
It will be described with reference to FIG.

First, in the output control section 9, the load request deviation signal E is inputted from the automatic output adjusting device 7, and the flow rate setting signal F is inputted.
Create The core flow rate calculation unit 15 inputs the local core flow rate signal P from the core flow rate detector 3 installed in the reactor 1, and calculates the core flow rate signal G. The flow rate control unit 10 creates the speed command signal K so that the deviation between the flow rate setting signal F and the core flow rate signal G becomes zero. Gang speed controller 11
Creates a gang speed command signal L based on the speed command signal K.

Subsequently, the gain adjusting section 17 carries out the processing shown in FIG. 6 and stores the number of operating internal pumps 2 based on the operating signal T during normal operation (before trip) (P6). . After the trip occurs, the number of internal pumps 2 that are operating without tripping is stored (P
7). Using the stored number of operating vehicles before and after the trip, the gain is calculated by the following equation (1) to obtain the gain (P8).

Gain = number of operating units before trip / number of operating units after trip --- (1)

With the gain thus obtained, the gang speed correction command signal S is created by the gain multiplication unit 18 based on the following equation (2).

Gang speed correction command signal S = gain × gang speed command signal L --- (2)

In a plurality of individual speed control units 12, an internal pump speed request signal M is created based on the gang speed correction command signal S, and a variable frequency power source N is supplied to the internal pump 2 installed in the reactor 1. Output to the variable frequency power supply device 13 to be supplied.

As described above, according to the second embodiment of the present invention, the internal pump 2 during the output control and the flow rate control is being executed.
Is tripped and the number of operating vehicles becomes equal to or less than the number of operating vehicles capable of output control and flow rate control, the upper automatic mode is changed to the manual mode, the output control section 9 and the flow rate control section 10 are excluded, and the upper level of the gang speed control section 11 The internal pump 2 is controlled by the manual mode.

Since the gang speed command signal L holds the speed setting signal when the output control and the flow rate control are excluded, the flow rate decreases due to the trip of the internal pump 2. In order to prevent this decrease in the flow rate, the gain adjusting unit 17 compares the number of operating machines before and after the trip, and increases the internal pump speed during operation as a whole. By increasing the speed of the internal pump 2, the core flow rate reduced by the trip can be recovered.

FIG. 7 is a block diagram showing a third embodiment of the present invention, in which the same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the third embodiment of the present invention. In the embodiment, the gain adjusting unit 17 and the gain multiplying unit 18 are used.
And the gain of each internal pump 2 is created as an individual predetermined gain based on the operating condition of the internal pump 2 and a predetermined operation pattern of the internal pump 2, and each internal pump 2 is individually created. The feature is that the core flow rate distribution is controlled to be uniform.

The gain adjusting unit 17 creates the gain of each internal pump 2 as an individual predetermined gain based on the operating condition of the individual speed control unit 11 in the individual automatic mode and the predetermined operating pattern of the internal pump 2. Then, each gain is output to the gain multiplication unit 18. The gain multiplication unit 18 outputs each gang speed signal obtained by multiplying the gang speed command signal L by an individual predetermined gain to each individual speed control unit 12.

Next, the operation of the third embodiment of the present invention will be described with reference to FIGS. 7 to 9.

First, in the output control section 9, the load request deviation signal E is inputted from the automatic output adjusting device 7, and the flow rate setting signal F is inputted.
Create The core flow rate calculation unit 15 inputs the local core flow rate signal P from the core flow rate detector 3 installed in the reactor 1, and calculates the core flow rate signal G. The flow rate control unit 10 creates the speed command signal K so that the difference between the flow rate setting signal F and the core flow rate signal G becomes zero. The gang speed control unit 11 creates the gang speed command signal L based on the speed command signal K.

Subsequently, the gain adjusting section 17 performs the processing shown in FIG. 9, and the operation distribution of the internal pump 2 based on the in-operation signal T which is an individual automatic mode input from each individual speed control section 12. Is recognized (P9). And
The recognized driving distribution is compared with a preset driving distribution pattern (P10). When a driving distribution pattern that matches the current driving distribution is found, the gain set in the driving distribution pattern is obtained (P11).

Using the gain thus obtained, the gain multiplying section 18 produces a gang speed correction command signal S based on the following equation (3).

Gang speed correction command signal S = gain × gang speed command signal L ----- (3)

In the plural individual speed control units 12, an internal pump speed request signal M is created based on the gang speed correction command signal S, and a variable frequency power supply N is supplied to the internal pump 2 installed in the reactor 1. Output to the variable frequency power supply device 13.

As described above, according to the third embodiment of the present invention, the operating number monitoring unit 17b in the gain adjusting unit 17 creates the operating distribution A of the internal pump 2 in the reactor 1 and the gain creating unit. Output to 17a. Gain creation unit 1
In 7a, the operation distribution A of the internal pump 2 is compared with the preset operation pattern of the internal pump 2, and the internal pump 2 set in the operation pattern is checked.
Select the gain for. This gain is set so that the core flow rate distribution becomes uniform for each operating state of the internal pump 2.

A gang speed correction command signal S obtained by multiplying the gang speed command signal L by a gain is sent to each individual speed control unit 12.
Is entered. The individual speed control unit 12 creates the internal pump speed request signal M based on the gang speed correction command signal S. Since the gain has a different value for each internal pump 2, the internal pump 2 is controlled at different speeds. As a result, the core flow rate distribution in the nuclear reactor 1 becomes uniform.

FIG. 10 is a block diagram showing a fourth embodiment of the present invention, in which the same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the fourth embodiment of the present invention. In the embodiment, the gain adjusting unit 17 and the gain multiplying unit 1 are provided.
8 is provided, and the speed of each internal pump 2 can be individually increased / decreased according to the core flow rate distribution to minimize the non-uniformity of the core flow rate.

Here, the gain adjusting section 17 creates the gain of each internal pump 2 as an individual predetermined gain based on the flow rate distribution obtained by obtaining the flow rate distribution of the core from each core flow rate signal and multiplies each gain. Output to the unit 18. The gain multiplication unit 18 outputs an individual gang speed signal obtained by multiplying the gang speed command signal L by an individual predetermined gain to the individual speed control unit 12.

Next, the operation of the fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

First, based on the load request deviation signal E input from the automatic output adjusting device 7, the output control section 9 creates the flow rate setting signal F so that the load request deviation signal E becomes zero. The flow rate control unit 10 obtains the deviation between the flow rate setting signal F and the core flow rate signal G, and creates the speed command signal K so that the deviation becomes zero. The gang speed control unit 11 inputs the speed command signal K and outputs the gang speed command signal L as it is. The core flow rate calculation unit 15 creates a core flow rate signal G from the local core flow rate signal P input from each sensor.

Subsequently, in the core flow rate deviation monitoring section 17c in the gain adjusting section 17, the processing shown in FIG. 12 is executed to generate the local core flow rate signal P and the core flow rate signal G which is the average value of the local core flow rate signal P. To obtain the core flow rate distribution U (P12). Further, the gain creating unit 17a creates a gain so that the core flow rate distribution U becomes uniform (P1).
3).

The gain multiplication unit 18 calculates the gang speed correction command signal S by the following equation (4) and outputs it to the individual speed control unit 12.

Gang speed correction command signal S = gain × gang speed command signal L --- (4)

The individual speed control unit 12 produces the internal pump speed request signal M based on the gang speed correction command signal S. Since the gain has a different value for each internal pump 2, the internal pump 2 is controlled at different speeds. As a result, the core flow rate distribution U in the reactor 1 becomes uniform.

As described above, in the fourth embodiment, the core flow rate distribution is obtained from each core flow rate signal, the individual predetermined gain for controlling each internal pump is obtained from this core flow rate distribution, and the gang speed command signal is obtained. Will be corrected. Therefore, each internal pump does not simply rotate at the same speed as in the conventional case, and the speed of each internal pump can be increased or decreased according to the core flow rate distribution. It is possible to minimize the non-uniformity of the flow rate.

FIG. 13 is a block diagram showing a fifth embodiment of the present invention. The same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the fifth embodiment of the present invention. The embodiment is characterized in that the gain adjusting unit 17 is provided and the predetermined control constants of the output control unit 9 and the flow rate control unit 10 are optimally changed according to the number of operating internal pumps 2.

Here, the gain adjusting unit 17 respectively sets a predetermined output control unit control constant and a predetermined flow rate control unit control constant according to the number of operating units in the individual automatic mode obtained by the operating condition of the individual speed control unit 12. They are created and set in the output control unit 9 and the flow rate control unit 10, respectively.

Next, the operation of the fifth embodiment of the present invention will be described with reference to FIG.
It will be described with reference to FIGS.

First, based on the load request deviation signal E input from the automatic output adjusting device 7, the output control section 9 creates the flow rate setting signal F so that the load request deviation signal E becomes zero. The flow rate control unit 10 obtains the deviation between the flow rate setting signal F and the core flow rate signal G, and creates the speed command signal K so that the deviation becomes zero. The gang speed control unit 11 inputs the speed command signal K and outputs it as the gang speed command signal L as it is.

The individual speed control unit 12 produces the internal pump speed request signal M based on the gang speed command signal L. The gain adjustment unit 17 executes the process shown in FIG. 15, and first, the operating unit number monitoring unit 17b calculates the operating unit number of the internal pump 2 in the individual automatic mode (P14). Subsequently, the gain creating unit 17a creates an optimum control constant V for the output control unit 9 and the flow rate control unit 10 based on the number of operating internal pumps 2 (P1).
5). The output control unit 9 and the flow rate control unit 10 can perform optimum control by using a variable control constant V.

As described above, according to the fifth embodiment of the present invention, the predetermined control constants of the output control section and the flow rate control section are changed according to the number of operating internal pumps. Therefore, since the internal pump is controlled by the optimum control constant, the response characteristics are improved and the core flow rate is controlled optimally.

FIG. 16 is a block diagram showing a sixth embodiment of the present invention. The same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the sixth embodiment of the present invention. The embodiment includes the discharge flow rate monitoring unit 20, determines whether or not the internal pump 2 to be activated is in the startable region, and when the internal pump 2 is in the non-startable region, decelerates the internal pump 2 once to set the startable region. In that case, it is characterized in that the target internal pump 2 is activated.

Here, the discharge flow rate monitoring unit 20 is a discharge flow rate sensor 1 provided corresponding to each internal pump 2.
An individual speed control unit other than the internal pump 2 that is started based on each discharge flow rate signal acquired from the CPU 9 is started to determine whether the internal pump 2 is in the startable region While outputting an internal pump speed reduction command signal to 12, the start command is output to the variable frequency power supply device 13 corresponding to the case of the startable region.

Next, the operation of the sixth embodiment of the present invention will be described with reference to FIG.
6 and FIG. 18, a description will be given.

First, based on the load request deviation signal E input from the automatic output adjusting device 7, the output control section 9 creates the flow rate setting signal F so that the load request deviation signal E becomes zero. The flow rate control unit 10 obtains the deviation between the flow rate setting signal F and the core flow rate signal G, and creates the speed command signal K so that the deviation becomes zero. The gang speed control unit 11 inputs the speed command signal K and outputs it as the gang speed command signal L as it is. The individual speed control unit 12 creates the internal pump speed request signal M based on the gang speed command signal L.

Subsequently, the discharge flow rate monitoring unit 20 carries out the processing shown in FIG. 18, and when the internal pump 2 is activated most of the time, one or two internal pumps 2 are activated.
The discharge flow rate signal W of the internal pump 2 to be activated is monitored (P16). When the discharge flow rate signal W of the startup target internal pump 2 is a flow rate that cannot be started, the discharge flow rate monitoring unit 20 instructs the individual speed control unit 12 of the internal pump 2 in operation to reduce the internal pump speed. X is output (P17, P18).

The individual speed control unit 12 of the internal pump 2 in operation decreases the internal pump speed request signal M in accordance with the internal pump speed reduction command signal X. When the discharge flow rate signal W of the internal pump to be started reaches the startable region due to the decrease in the internal pump speed, the discharge flow rate monitoring unit 20 outputs the start command signal Y to the start target variable frequency power supply device 13. To do. The variable frequency power supply device 13 activates the internal pump 2 based on the activation command signal Y.

As described above, according to the sixth embodiment of the present invention, it is determined whether or not the internal pump to be started is in the startable region, and when it is in the non-startable region, the internal pump can be decelerated once and started. When the area is reached, the internal pump is activated. Therefore, a high load is not applied to the starting internal pump, and the occurrence of failure can be avoided,
Moreover, since it is executed without human intervention, the operator's burden can be reduced.

FIG. 19 is a block diagram showing a seventh embodiment of the present invention. The same reference numerals as those in FIGS. 23 and 24 showing the prior art indicate the same or corresponding portions, and the seventh embodiment of the present invention. The embodiment includes a discharge flow rate monitoring unit 20 and an internal pump reduction command creation unit 21, determines whether or not the internal pump 2 to be activated is in a startable region, and selects the internal pump selected in the non-startable region. The feature is that only the pump 2 is once decelerated and the target internal pump 2 is started when the startable region is reached.

Here, the discharge flow rate monitoring unit 20 takes in each discharge flow rate signal from the discharge flow rate sensor 19 and creates discharge flow rate distribution information, and the internal pump 2 activated from this information is a non-startable area or a startable area. It is determined whether or not the start-up command is output to the corresponding variable frequency power supply device 13 in the startable region. Internal pump reduction command creation unit 2
In the case of a non-startable area, 1 takes in the discharge flow rate distribution information, selects the internal pump 2 that decelerates the internal pump 2 from this information, and instructs the corresponding individual speed control unit 12 to reduce the internal pump speed. Output a signal.

Next, the operation of the seventh embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

First, based on the load request deviation signal E input from the automatic output adjusting device 7, the output control section 9 creates the flow rate setting signal F so that the load request deviation signal E becomes zero. The flow rate control unit 10 obtains the deviation between the flow rate setting signal F and the core flow rate signal G, and creates the speed command signal K so that the deviation becomes zero. The gang speed control unit 11 inputs the speed command signal K and outputs it as the gang speed command signal L as it is. The individual speed control unit 12 creates the internal pump speed request signal M based on the gang speed command signal L.

Subsequently, the discharge flow rate monitoring unit 20 performs the processing shown in FIG. 21 to monitor the discharge flow rate signal W of the internal pump 2 (P20).

Next, the discharge flow rate distribution Z in the reactor 1 is created from the discharge flow rate signals W of all the internal pumps 2,
It is output to the internal pump reduction command creation unit 21. Furthermore, it is determined whether the internal pump 2 can be started by the monitored discharge flow rate signal W (P22). If the activation is possible, the internal pump activation command signal Y is output to the variable frequency power supply device 13 (P23).

Next, the internal pump reduction command preparation unit 2
The process 1 will be described with reference to FIG.

The internal pump reduction command preparing section 21 selects an internal pump for reducing the internal pump speed based on the discharge flow rate distribution Z input from the discharge flow rate monitoring section 20 (P24). The internal pump speed reduction command signal X is output to the selected internal pump (P25). The individual speed control unit 12 decreases the internal pump speed request signal M according to the internal pump speed reduction command signal X to decrease the speed of the internal pump 2. When the speed of the internal pump 2 decreases and the discharge flow rate signal W reaches a discharge flow rate that can be started, a start command Y is output to the variable frequency power supply device 13.

As described above, according to the seventh embodiment of the present invention, it is determined whether or not the internal pump to be activated is in the startable region, and when it is in the non-startable region, only the internal pump selected is temporarily decelerated. Then, the target internal pump is started when the startable area is reached. Therefore, it is possible to start the reactor without reducing the core flow rate as much as possible rather than uniformly, so that it is possible to reliably start the engine at an early stage, and it is possible to avoid the occurrence of a failure without applying a high load to the starting internal pump. Moreover, since it is executed without human intervention, the burden on the operator can be reduced.

[0085]

As described above, according to the invention of claim 1, since the internal pumps can be operated in the automatic mode according to the furnace output condition, a small number of internal pumps can be operated even at the low furnace output. Thus, it is possible to operate in the automatic mode, and the operation in the automatic mode cannot be performed unless the number of vehicles is not less than the predetermined number as in the conventional case, and the complicated manual operation becomes unnecessary, and the burden on the operator can be reduced.

According to the second aspect of the present invention, the predetermined gain is calculated based on the number of operating internal pumps before and after the trip, and the calculated predetermined gain is multiplied by the gang speed command signal. , Since the multiplied gang speed command signal is output to the individual speed control unit, the gang speed command signal is corrected according to the increase or decrease in the number of operating internal pumps, and the rapid fluctuation of the core flow rate is minimized. You can

According to the third aspect of the invention, a gain for controlling each internal pump is created as an individual predetermined gain based on the current operating state of the internal pump and a predetermined operating pattern of the internal pump. Since each internal pump is controlled based on each gang speed command, the internal pumps can be controlled individually instead of operating the internal pumps uniformly at the same speed as in the conventional case. Non-uniformity can be minimized.

According to the fourth aspect of the present invention, the core flow rate distribution is obtained from each core flow rate signal and is obtained as an individual predetermined gain for controlling each internal pump. Since each internal pump does not simply rotate at the same speed and the speed of each internal pump can be increased or decreased according to the core flow rate distribution, the unevenness of the core flow rate can be minimized.

According to the invention of claim 5, the internal pump can be controlled by the optimum control constant for changing the predetermined control constants of the output control unit and the flow rate control unit according to the number of operating internal pumps. The response characteristics can be improved and the core flow rate can be optimally controlled.

According to the invention of claim 6, it is judged whether or not the internal pump to be started is in the startable region, and when it is in the non-startable region, the internal pump is once decelerated to become the startable region. Since the pump is started, a high load is not applied to the internal pump to be started, and the occurrence of a failure can be avoided. Further, since the operation is performed without human intervention, the burden on the operator can be reduced.

According to the seventh aspect of the present invention, only the internal pump selected in the internal pump non-startable region to be started is once decelerated and the target internal pump is started in the startable region. For this reason, it is possible to start the reactor without reducing the core flow rate as much as possible, so that it is possible to surely start the engine at an early stage, and moreover, since it is executed without human intervention, the operator's burden can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an internal pump control device showing a first embodiment of the present invention.

FIG. 2 is a functional configuration diagram showing details of the internal pump control device of FIG.

FIG. 3 is a flowchart showing a process of an automatic control permission decision unit of FIG.

FIG. 4 is a configuration diagram of an internal pump control device showing a second embodiment of the present invention.

5 is a functional configuration diagram showing details of the internal pump control device in FIG. 4. FIG.

FIG. 6 is a flowchart showing a process of a gain adjusting unit in FIG.

FIG. 7 is a configuration diagram of an internal pump control device showing a third embodiment of the present invention.

8 is a functional configuration diagram showing details of the internal pump control device of FIG. 7. FIG.

9 is a flowchart showing a process of a gain adjusting unit in FIG.

FIG. 10 is a configuration diagram of an internal pump control device showing a fourth embodiment of the present invention.

11 is a functional configuration diagram showing details of the internal pump control device of FIG.

FIG. 12 is a flowchart showing a process of a gain adjusting unit of FIG.

FIG. 13 is a configuration diagram of an internal pump control device showing a fifth embodiment of the present invention.

FIG. 14 is a functional configuration diagram showing details of the internal pump control device of FIG. 13.

FIG. 15 is a flowchart showing a process of a gain adjusting unit of FIG.

FIG. 16 is a configuration diagram of an internal pump control device showing a sixth embodiment of the present invention.

FIG. 17 is a functional configuration diagram showing details of the internal pump control device of FIG. 16.

FIG. 18 is a flowchart showing a process of a discharge flow rate monitoring unit of FIG.

FIG. 19 is a configuration diagram of an internal pump control device showing a seventh embodiment of the present invention.

FIG. 20 is a functional configuration diagram showing details of the internal pump control device of FIG. 19.

FIG. 21 is a flowchart showing a process of a discharge flow rate monitoring unit of FIG.

22 is a flowchart showing a process of an internal pump reduction command creation unit in FIG.

FIG. 23 is a configuration diagram showing a conventional internal pump control device.

FIG. 24 is an explanatory diagram showing a relationship between an individual speed control unit and a gang speed control unit.

[Explanation of symbols]

 1 Reactor 2 Internal Pump 3 Core Flow Detector 8 Internal Pump Control Device 9 Output Control Unit 10 Flow Control Unit 11 Gang Speed Control Unit 12 Individual Speed Control Unit 13 Variable Frequency Power Supply Device 14 Nuclear Instrumentation System 15 Core Flow Calculation Unit 16 Automatic Control Permission Determining Section 17 Gain Adjusting Section 18 Gain Multiplying Section 20 Discharge Flow Rate Monitoring Section 21 Internal Pump Reduction Command Creating Section

Claims (7)

[Claims] 1. An output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. An internal pump control device equipped with an individual speed control unit that can output to the device Internal pump controller, characterized in that it comprises the automatic insertion permission determination unit from operating conditions of the individual speed control unit and the number of operating pumps and outputs the permission signal to the automatic mode. 2. An output control unit for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. In the internal pump control device having an individual speed control unit capable of outputting to the device, the gang speed control unit outputs the output. A gain multiplying unit that outputs a gang speed command signal obtained by multiplying a gang speed command signal by a predetermined gain to the individual speed control unit, and the operation status of the individual speed control unit are incorporated, and the number of operating units before the internal pump trip An internal pump control device comprising: a gain adjusting unit that calculates the predetermined gain based on the number of operating pumps after the internal pump trip and outputs the predetermined gain to the gain multiplying unit. 3. An output control unit for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. An internal pump control device comprising an individual speed control unit capable of outputting to the device, wherein the gang speed command signal has a separate position. A gain multiplying unit that is individually provided corresponding to each individual speed control unit that outputs each gang speed signal obtained by multiplying the gain to each individual speed control unit, and an operating situation of the individual speed control unit and the predetermined An internal pump control device, comprising: a gain adjusting unit that creates the individual predetermined gain for each internal pump based on the operation pattern of the internal pump and outputs the individual predetermined gain to each gain multiplying unit. 4. An output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. An internal pump control device comprising an individual speed control unit capable of outputting to the device, wherein the gang speed command signal has a separate position. It is obtained by calculating the flow rate distribution of the core from the gain multiplying section that is individually provided corresponding to the internal pump that outputs the individual gang speed signal obtained by multiplying the gain to the individual speed control section, and each core flow rate signal. An internal pump control device comprising: a gain adjusting unit that creates the individual predetermined gain for each internal pump based on a flow rate distribution and outputs the individual predetermined gain to each gain multiplying unit. 5. An output control section for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. In an internal pump control device having an individual speed control unit capable of outputting to the device, the A gain adjusting unit for creating a predetermined output control unit control constant and a predetermined flow rate control unit control constant according to the obtained number of operating units and setting the output control unit and the flow rate control unit respectively. Internal pump control device. 6. An output control unit for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. In an internal pump control device equipped with an individual speed control unit that can output to the device, it is provided corresponding to each internal pump. Based on each discharge flow rate signal acquired from the discharge flow rate sensor, it is determined whether the internal pump that is started is in the startable area, and if this determination is in the non-startable area, individual speed control other than the internal pump is started. An internal pump speed reduction command signal to the pump unit, and a discharge flow rate monitoring unit that outputs a startup command to the variable frequency power supply device corresponding to the startable region when the internal pump is provided. Control device. 7. An output control unit for outputting a flow rate setting signal based on a load demand deviation signal created so that a generator output based on a turbine inlet pressure signal becomes a target generator output, and a core input from a core flow rate sensor. A flow rate control unit that outputs a speed command signal obtained by calculating so that the flow rate signal becomes the flow rate setting signal, and a gang speed that outputs the speed command signal as a gang speed command signal when a permission signal to the automatic mode is input. A gang speed command signal is input to each of the control unit and a plurality of internal pumps to create a speed request signal and output to a variable frequency power supply device, while a manual signal is individually output to the variable frequency power supply. In an internal pump control device equipped with an individual speed control unit that can output to the device, it is provided corresponding to each internal pump. Each discharge flow rate signal from the discharge flow rate sensor is taken in, discharge flow rate distribution information is created, and it is judged from this information whether the internal pump to be started is in the non-startable area or the startable area. A discharge flow rate monitoring unit that outputs a start command to the variable frequency power supply unit and an internal pump that decelerates the internal pump from this information when the discharge flow rate distribution information is taken in the case of the non-startable area by the above determination are selected. An internal pump control command generating unit that outputs an internal pump speed control command signal to a corresponding individual speed control unit.