JPS5954997A - Power control device for bwr type reactor plant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an output control device for a boiling water type nuclear power generation plant (BWR power generation plant).

[Technical background of the invention]

Figure 1 is a block diagram showing plant output control based on the recirculation flow rate of a BWR power plant.9 In this figure, 1 is the BWR, 2 is the turbine, 3 is the generator, 4 is the control valve, and 5 is the recirculation pump. , 6 is the pump drive motor, 7 is □
The generator, which is driven by the MG upper set motor 9 through the fluid coupling 8 and supplies power to the pump drive motor, is a load setter. The speed of the generator 3 is determined by the speed detector 11
The speed signal 12 is compared with a set value 14 in a comparator 13. The obtained destination speed deviation 15 and the output 17 of the load setting device 16 are added in the □ adder 16 to obtain the calculated load i value 18.

On the other hand, the output 4.1 of the pressure controller 20 that drives the control valve servo 19 is 1.□ Main steam total flow rate signal 2'''i'l
and negative '1: Stomach: 1 load requirement value 18 is 1. : Comparator 22
Smell, taste and eaves: 111111111111
．． 1. :1 The deviation is given to the recirculation main controller 24 as a load request error signal 23. The recirculation main controller 24 is configured with a proportional-integral operation, and adjusts the core cape volume through the speed controller 25 and the effluent hand 8 so that the load request error signal becomes zero. ,
,,.

In addition, a pressure and force control device 20tl is provided at the inlet side of the control valve of the upper trachea 26, and the output of the pressure detector 27, that is, the turbine inlet pressure signal 28 and the turbine inlet pressure set value 29 are detected by a comparator 30. Compare and adjust adjusting valve No. 4 according to the side thread 3'4'□. □' - Changes in reactor output due to changes in cardiac flow rate are J pressure 'force i and left 11111'
,, ・ ”':”-, T*”?Fi':*-”uga-q, 3-b
s. a,. , ♀, that is, when the load request value 17 increases or when the turbine rotational speed decreases, the recirculation main controller 24 increases the core flow rate. As a result, both the reactor pressure and the turbine inlet pressure rise.

-□...As a result, the pressure controller 20 opens the regulating valve 4, increases the steam flow rate, and increases the load request error signal. ：：、・－、、、
One:,.

Set 23 back to zero.

"":"1"4'O, i"lth::昂1"32 jJ: A rigid connection 10 insertion fixed point adjuster is provided, and the load request error signal 23 is guided to the comparator 30, and the temporary Changes to the pressure set point have also been made to improve the initial response characteristics of the plant. .

7.・[Problems with background technology]... ・ □
・-：、JO：、Kiya JW、jR There is a nibrant skewer force control system, and currently the plant output is rounded and suspended only by maintaining the load at the value manually set on the load setting device IO. It does not have the function to follow the 'A blood load command value' from the central power supply control room ('Hanging 1 supply'□)''.In addition, it does not have the function to follow the 'A blood load command value'.
111,, no! The owner of the house, the owner, the steam flow, the amount □,
In the control system shown in Fig. 1, the main xia'',
Flow rate signal 2], in other words, the main steam flow rate is required; 4. ．． ! It is simply controlled to be equal to the warehouse demand jf4.18.

However, the load command value commanded from the intermediate supply to each plant [: AFO (Automatic Freeluen
cy 0otro],) Shindan, DPO (Di, 5pat
, c, h Power 0ontro, l) signal] is,
This is the output of the generator, and is in the unit of MW6.

The relationship between the main steam total flow rate and the generator output is expressed as follows.

1+ST’2 χ=11(D) P: Turbine inlet pressure PTo: Turbine set pressure D: Main steam total flow signal χ: Adjustment valve opening degree, next calculated value.

m: Control valve steam flow rate MW *, generator Uj force fl: Adjustment valve opening-half nonlinear compensation.

f2: Adjustment valve opening - flow rate characteristic TI N = 1~. 4) Two time constants 7 α: Variable of high pressure turbine output ratio S Nira plus -'□ Lu ・
.

As shown in the above formula, to find the generator neutral power from the main steam total flow rate signal +44, 1. A function generator is required to compensate for the non-linear characteristic of the opening of the control valve and the flow rate.

The function and generator are set so that the main steam total flow rate signal and the regulating valve steam flow rate have a linear relationship of 1:1.
】~2ch, there is an error of 3. Therefore, at the generator output, now,
However, the same error/difference will occur.

・Due to the above reason, if you want to operate the blunt according to the load command value from the intermediate supply, manually operate the load setting device 10 according to the command from the intermediate supply. , the output of the load setter can be set simply by the intermediate supply or by the load command value from .
If this were done alone, it would be necessary to constantly monitor commands from the hollow and the generator output value, which would rapidly increase the burden on plant operators.・.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and aims to provide a BWR bran fJ3 force control device that can automatically and accurately and stably follow the generator output to the load command value from the intermediate supply. .

[Summary of the invention]

In the present invention, three values are used: the generator output, the load command value from the intermediate supply, that is, the AFO command, and the DPC command.
The above objective is achieved by providing a circuit that calculates the plant load setting value by taking into account the response characteristics of the WR plant.

[Embodiments of the invention]

FIG. 2, in which the same parts as in FIG. 1 are denoted by the same reference numerals, shows an embodiment of the present invention. As shown in this figure, in the present invention, the upper controller of the output setting device 10 and the DPO signal 33
, AIT'O signal 34, and a generator output signal 35 which is a feedback signal are inputted, and a plant output setting device control device 37 is provided which calculates a required plant output value 36, drives an output setting device 10'f, and drives the output setting device 10'f. Details of this control device 37 are shown in FIG.

In the 3rd m', the AII'C signal 34 from the intermediate supply is
□Mountain: Xi・,,Kamo・)□:,1・:・1・After passing through the incoming FC signal compensator 38, the change rate and wave peak jlf11 limit 8G'39 change rate O': 1 wave. The restriction is applied to the adder 46 from the intermediate supply to the g"T)F"0 signal 3.
3′,! : Added, plan book negative cycle request compensation number 41,,'
, is said to be recited. The load request signal is guided to the controller A4.2, and the comparator "<3M'
Compared to 5. The side thread signal 44 of the
I'm in love with you. Controller A: 14"4 is the initial response of the engine output, improves the performance, and improves the birth control. Ah, Ka, Ra, Transmission - Shown by the bush □ -1 + s'rl K1 gain TI, T2: Time It has a lead/lag element which is a constant S nila plus operator. Also, the controller B
Since the main purpose of 45 is to make the deviation between the plant load request signal 41 and the generator output signal 35 zero during settling, it is a controller with proportional-integral operation, and the transfer function can be expressed as follows. It is.

K2: Proportional gain T3: Integral time constant The outputs of the controllers A42 and B45 are added by an adder 46 and added to the load setting value 36.

The output J7 of the load adjuster 10 is varied by this load setting value 36. The i-power 17 of the load setting device 10 is directly compared to the main steam total flow rate signal 21, and the load request error signal 23
．． ! Knee'i,,ru. The output control of the BWR plant above this is done in the same way as in the past.

In the above embodiment, the output setting device 10 is controlled by the λFO command and the DPO command from the intermediate supply, but instead of the DPO signal from the intermediate supply, any arbitrary variable with time as an independent variable may be used. It can also be controlled by the output from the output pattern generation circuit. FIG. 4 shows an example of an output pattern.

〔Effect of the invention〕

As is clear from the above, according to the present invention, the output of the BWR plant can be automatically made to follow the load command value of the intermediate supply, so the burden on the operator can be reduced.
Ru.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional BWF plant output control device; Fig. 2- is a block diagram of an embodiment of the present invention; Fig. 3 is a partially enlarged block diagram; Fig. 4 is a block diagram of the load ,
This is a basic pattern. l...BWRl 2...Turbine, 3...
Generator, 4... Regulating valve,' 5... Recirculation pump,
'6...MG Momone 7...MG Generator, 8
...Fluid joint, 9...M() drive motor, 10
...Load setting device, "l...Speed detector, 12.
... Generator speed signal, 13... Fart comparator, 14...
・Generator moderate setting value, 15... Generator speed deviation,
16... Adder, 17... Load setting device output, 1
8...Load request value, 19...Adjustment valve servo, 2
0...Pressure controller, 21...Main steam total flow rate signal,
22... Comparator, 23... Load request error signal 5 2
4... Recirculation main controller 1.25... Recirculation speed controller 1. ,．． 26. ...Main steamer 9, 27-...Pressure detector, 28...Taniten input pressure signal, 2
9...Turbine inlet pressure constant value, 30...Comparator,
31... Deviation, 32... Pressure set point regulator, 33... DPO No. 5, 34... AFO signal, 35... Generator output signal, 36. ...Plant output requirement value, 3.7...Load setter, lt main controller 38...AFO signal compensator 1.39...Change rate and cape] limiter, 40...Additional Vessel, 4:
Runt with 1... Load request signal, 42...controller A, 43...
- Adder, 44... Deviation signal, 45... Controller B146... Adder. Application agent Patent attorney Kikuchi Department 5 11-

Claims (1)

[Claims] ■ In a system that controls the output of a boiling water nuclear power plant using the recirculation flow rate of the reactor core, a signal obtained by compensating the automatic frequency control signal from the central power dispatch center and a base load signal are used. The output of controller A, which uses the summed signal as input and performs proportional operation including phase compensation, and the output of controller B, which uses the difference between the sum i and the generator output as input and is configured by proportional integration. 1. An output control device for a boiling water type Harakuriki Hairyu plant, which is characterized in that it controls a load setting device according to the sum of the sum. ■ As the base load signal, D from □Central Load Dispatch Center□
Claim 1 characterized in that PC signals are used.
Output control device for boiling water type □ nuclear power plant described in Section 2. (2) An output control device for a boiling water nuclear power plant, characterized in that an output signal of a pattern generation circuit capable of generating J arbitrary patterns is used as a base load signal.