CN103867456A - Control system and control method for regulating rotation speed of electrically driven feed pump of nuclear power station - Google Patents
Control system and control method for regulating rotation speed of electrically driven feed pump of nuclear power station Download PDFInfo
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- CN103867456A CN103867456A CN201210535548.7A CN201210535548A CN103867456A CN 103867456 A CN103867456 A CN 103867456A CN 201210535548 A CN201210535548 A CN 201210535548A CN 103867456 A CN103867456 A CN 103867456A
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Abstract
The invention discloses a control system and a control method for regulating a rotation speed of an electrically driven feed pump of a nuclear power station. The control system comprises a digital control system, a scoop executing mechanism, a hydraulic couple and a water feed pump that are connected in sequence, wherein the digital control system comprises a rotation speed signal acquiring unit and a central processing unit; the rotation speed signal acquiring unit is used for acquiring a rotation speed set value signal and a rotation speed feedback signal; the central processing unit is further used for obtaining a scoop opening degree signal according to logic processions upon the rotation speed set value signal and the rotation speed feedback signal, so that the scoop executing mechanism can regulate a fuel level of the hydraulic coupler according to the scoop opening degree signal so as to control the rotation speed of the water feed pump. According to the control system and the control method for regulating the rotation speed of the electrically driven feed pump of the nuclear power station disclosed by the invention, the digital control system is applied to performing logic processions about control of the rotation speed, so that a PLC independent from a DCS in the prior art is omitted; meanwhile, the number of apparatuses of the control system and signal switching between the DCS and the PLC are reduced, a response time of the system is effectively shortened, the efficiency and the stability of rotation speed regulation are increased.
Description
Technical field
The invention belongs to nuclear power technology field.More specifically, the present invention relates to control system and the method for nuclear power station electrically driven feedpump rotational speed regulation.
Background technique
The function of nuclear power station electrically driven feedpump is that the water of oxygen-eliminating device is extracted out, after boosting, delivers to steam generator through high-pressure heater.The object of main feed pump rotating speed control is to ensure that the pressure reduction between feed main and the steam main of steam generator equals a setting valve with load variations, remain constant so that pressure reduction is approximate before and after feedwater flow control system modulating valve, thereby eliminate the coupling influence feeding water between three steam generators, meet the water supply flow requirement of steam generator.Nuclear power engineering has objectively been created condition for including feed-water pump control in DCS after adopting Digitizing And Control Unit (digital controlsystem, DCS) to control nuclear power station instrument control system.Wherein, the rotational speed regulation process of feed water pump completes (as shown in Figure 1) jointly by the logical process of DCS and programmable logic controller (PLC) (PLC).The rotational speed setup value signal of main feedwater flow control system (ARE) regulator in it is passed to PLC by DCS, utilize the transmitter that tests the speed that the speed feedback signal of feed water pump is also passed to PLC simultaneously, PLC is subsequently according to the pid control algorithm output current signal of setting, reconcile the oil level of hydraulic couplers by spoon tube actuator, therefore realize the rotational speed regulation of feed water pump.
In the scheme of above-mentioned prior art, as shown in Figure 2, the signal of delivering to PLC from DCS has handshaking between DCS and PLC: rotating speed state of a control (AUTO or MANUAL), manually rise rotary speed instruction, manually fall rotary speed instruction, rotating speed control command (sending from ARE regulator), feed water pump running state feedback and speed of feedwater signal.The signal of delivering to DCS from PLC has: speed of feedwater signal, speed of feedwater <200r/min, speed of feedwater <6r/min, rotating speed be greater than setting value, feed water pump reverse signal, speed of feedwater automatic control state, feed water pump in minimum speed position, the normal and control system fault of control system.Obviously, between two kinds of control system of DCS and PLC, handshaking is more, and the response time of control system is DCS and PLC response time sum.Therefore above-mentioned handshaking process has caused too much medium tache, therefore makes the response time of rotational speed regulation increase.In addition, system layout complexity while adopting above-mentioned control system, potential equipment failure point is more, and the cost of operation and maintenance is all higher.
Summary of the invention
The technical problem to be solved in the present invention is, the rotational speed regulation response time increase too much causing for handshaking between DCS in prior art and PLC, the problem of system layout complexity, provide one to realize response time section and configure simple control system and method; In technological scheme of the present invention, simplify by controlling unit in the middle of reducing the control procedure that speed of feedwater regulates.
The technical problem to be solved in the present invention is achieved by the following technical programs: a kind of control system of nuclear power station electrically driven feedpump rotational speed regulation is provided, comprises the Digitizing And Control Unit, spoon tube actuator, hydraulic couplers and the feed water pump that connect successively;
Described Digitizing And Control Unit comprises tach signal acquiring unit and central processing unit, and described tach signal acquiring unit is used for obtaining rotational speed setup value signal and speed feedback signal; Described central processing unit also obtains scoop tube aperture signal according to the logical process that described rotational speed setup value signal and described speed feedback signal are carried out, so as described spoon tube actuator according to the oil level of hydraulic couplers described in described scoop tube aperture Signal Regulation to control the rotating speed of described feed water pump.
In the control system of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described Digitizing And Control Unit also comprises control mode judging unit, and what while controlling the rotating speed of described feed water pump for judging, adopt is automatic control mode or manual control mode.
In the control system of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described Digitizing And Control Unit comprises main feedwater flow controlled adjuster; In the time of the rotating speed of feed water pump described in adopting described automatic control mode control, described rotational speed setup value signal is that described main feedwater flow controlled adjuster produces, the first rotational speed setup value signal to described tach signal acquiring unit to be passed.
In the control system of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described Digitizing And Control Unit comprises manual definite value unit; In the time of the rotating speed of feed water pump described in adopting described manual control mode control, described rotational speed setup value signal is that described manual definite value unit obtains, the second rotational speed setup value signal to described tach signal acquiring unit to be passed.
In the control system of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described Digitizing And Control Unit also comprises amplitude limit unit; If described scoop tube aperture signal, within the scope of the signal amplitude of described amplitude limit unit, transmits described scoop tube aperture signal to described spoon tube actuator.
In the control system of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described Digitizing And Control Unit also comprises the spoon tube actuator valve position signal acquiring unit of the valve position feedback signal for receiving described spoon tube actuator.
According to a further aspect in the invention, provide a kind of controlling method of nuclear power station electrically driven feedpump rotational speed regulation, comprise the following steps:
Digitizing And Control Unit obtains rotational speed setup value signal and the speed feedback signal from the transmitter that tests the speed;
Digitizing And Control Unit obtains scoop tube aperture signal according to the logical process that described rotational speed setup value signal and described speed feedback signal are carried out, so as spoon tube actuator according to the oil level of described scoop tube aperture Signal Regulation hydraulic couplers to control the rotating speed of described feed water pump.
In the controlling method of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, before obtaining rotational speed setup value signal, described method is further comprising the steps of:
What while judging the rotating speed of controlling described feed water pump, adopt is automatic control mode or manual control mode;
If adopt described automatic control mode, described rotational speed setup value signal is the first rotational speed setup value signal producing by the main feedwater flow controlled adjuster in described Digitizing And Control Unit.
In the controlling method of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, before obtaining rotational speed setup value signal, described method is further comprising the steps of:
What while judging the rotating speed of controlling described feed water pump, adopt is automatic control mode or manual control mode;
If adopt described manual control mode, described rotational speed setup value signal is the second rotational speed setup value signal obtaining by the manual definite value unit in described Digitizing And Control Unit.
In the controlling method of above-mentioned nuclear power station electrically driven feedpump rotational speed regulation, described method also comprises carries out amplitude limit operation to described scoop tube aperture signal; If described scoop tube aperture signal, within the scope of signal amplitude, passes to described spoon tube actuator by described scoop tube aperture signal.
Implement the present invention and can obtain following beneficial effect: the logical process of being carried out rotating speed control in control system of the present invention by Digitizing And Control Unit, omit the PLC that is independent of DCS in prior art, not only reduce the number of devices of control system, and reduce the handshaking between DCS and PLC in prior art, thereby can shorten system response time, improve efficiency and the stability of rotational speed regulation simultaneously.In addition, the minimizing of control system equipment quantity can reduce equipment investment, is conducive to controlling run and maintenance cost.
Brief description of the drawings
Below with reference to the drawings and specific embodiments, the present invention is described in further details.In accompanying drawing:
Fig. 1 is the schematic diagram that in prior art, speed of feedwater regulates;
Fig. 2 is the schematic diagram of the handshaking of carrying out between DCS and PLC in prior art;
Fig. 3 is the schematic diagram of the interior handshaking of control system of speed of feedwater adjusting of the present invention;
Fig. 4 is the schematic diagram of the control system of speed of feedwater adjusting of the present invention;
Fig. 5 is another schematic diagram of the control system of speed of feedwater adjusting of the present invention;
Fig. 6 is the flow chart of the controlling method of speed of feedwater adjusting of the present invention; And
Fig. 7 is another flow chart of the control system of speed of feedwater adjusting of the present invention.
Embodiment
For making object of the present invention, technological scheme and effect clearer, below with reference to the drawings and specific embodiments, the present invention is described in further details.It should be understood that following examples are only in order to explain the present invention, and the present invention is not done to any restriction.
The invention provides a kind of system that the rotating speed of nuclear power station electrically driven feedpump is controlled (hereinafter to be referred as control system), the logical process such as proportion integration differentiation algorithm (PID) control algorithm in this control system, the speed of feedwater being realized by PLC in prior art being regulated are included the scope of DCS in, thereby realize described rotating speed control.In other words,, in control system of the present invention, DCS replaces former PLC carries out proportion integration differentiation calculating logical process to speed of feedwater, therefore can cancel the control cabinet of PLC on the spot of electrically driven feedpump.This control system does not need to increase other equipment simultaneously, only the valve position feedback signal of the speed feedback signal of feed water pump, spoon tube actuator directly need to be sent into DCS, and the control command of spoon tube actuator is directly delivered to corresponding device by DCS.As shown in Figure 3, it is the handshaking schematic diagram of DCS and relevant device in control system of the present invention.Compared with Fig. 2, the I/O of DCS does not increase, but also has reduced the data informations such as PLC trouble signal warning, and the handshaking process between distinct device is obviously simplified.Further combined with accompanying drawing, this control system is illustrated below.
As shown in Figure 4, it shows the control system of a kind of nuclear power station electrically driven feedpump rotational speed regulation of the present invention.This control system 10 comprises the Digitizing And Control Unit 11, spoon tube actuator 12, hydraulic couplers 13 and the feed water pump 14 that connect successively, Digitizing And Control Unit 11 passes through the oil level of spoon tube actuator 12 regulator solution mechanical couples 13, thereby the rotating speed of feed water pump 14 is controlled.Particularly, Digitizing And Control Unit 11 comprises a central processing unit 111 and for obtaining the tach signal acquiring unit 112 of rotational speed setup value signal and speed feedback signal.With prior art distinguishes be, central processing unit of the present invention has the logical process function of former PLC, especially there is the PID logical process function that the rotating speed of feed water pump is controlled, also be that central processing unit 111 can be carried out proportion integration differentiation calculating according to the pid control algorithm of setting, thus the signal that output is controlled speed of feedwater.In conjunction with Fig. 3, central processing unit 111 can be carried out proportion integration differentiation calculating after receiving rotational speed setup value signal and speed feedback signal, thereby obtains scoop tube aperture signal.DCS exports this scoop tube switching signal after spoon tube actuator 12 to, the oil level of the control command regulator solution mechanical couple that spoon tube actuator 12 can reflect according to scoop tube aperture signal, thus realize the adjusting of speed of feedwater.
Control system 10 shown in Fig. 4 also comprises the transmitter 15 that tests the speed being connected with tach signal acquiring unit 112; This test the speed transmitter 15 for measure feed water pump 14 rotating speed, produce speed feedback signal, and fed back to tach signal acquiring unit 112.In addition, Digitizing And Control Unit 11 also comprises the spoon tube actuator valve position signal acquiring unit (not shown) of the valve position feedback signal for receiving spoon tube actuator 12.
Fig. 5 shows the control system 20 of another nuclear power station electrically driven feedpump rotational speed regulation of the present invention.Similarly, this control system 20 comprises the Digitizing And Control Unit 21, spoon tube actuator 22, hydraulic couplers 23 and the feed water pump 24 that connect successively, and the transmitter 25 that tests the speed of speed feedback signal is provided.In addition,, because the rotational speed regulation of electrically driven feedpump has automatic control mode and manual two kinds of modes of control mode, operator can further select the most applicable control mode according to the operating conditions of unit equipment.Conventionally operator can select under the control module of power station computerized information and control system (KIC).Correspondingly, in this control system 20, DCS 21 comprises control mode judging unit 213, and its concrete control mode that is used for adopting while judging the rotating speed of controlling feed water pump 24 according to operator's concrete selection is automatic control mode or manual control mode.The obtain manner difference of DCS medium speed setting value signal of the present invention under different control modes.
Under automatic control mode, produce the first rotational speed setup value signal by main feedwater flow control system (ARE) regulator 214 in DCS, the speed of feedwater instruction that for example ARE regulator sends is 4～20mA.The first rotational speed setup value signal that now central processing unit 211 of DCS21 is sent according to ARE regulator 214 compares with the on-the-spot speed feedback signal recording, through the conversion of analog amount digital quantity, and carry out proportion integration differentiation calculating according to the pid control algorithm of setting, obtain scoop tube aperture signal, thereby the oil level of regulator solution mechanical couple changes the rotating speed of feed water pump.
Under manual control mode, obtain manually the second rotational speed setup value signal of input of operator by the manual definite value unit 215 in DCS, it is 5～15mA that for example operator inputs to pump rotary speed instruction according to the operating mode of unit equipment; The valve position feedback signal of spoon tube actuator valve position signal acquiring unit Real-time Obtaining spoon tube actuator 12 under this pattern, and using this valve position feedback signal as the tracking signal of monitoring manual control mode.Manually under control mode, operator can carry out raising speed or reduction of speed operation on KIC.Manual definite value unit 215 is the signal magnitude to spoon tube actuator according to the final regulation output of operator's input, thereby the oil level of regulator solution mechanical couple is finally realized the manual control of speed of feedwater.
Further, DCS 21 of the present invention also comprises amplitude limit unit 26, and it carries out amplitude limit to the definite scoop tube aperture signal of central processing unit 211 under under automatic control mode and manual control mode, with the rotating speed of guaranteeing feed water pump between the upper and lower of setting.Particularly, only, in the time that scoop tube aperture signal is within the scope of the signal amplitude of amplitude limit unit 26, transmit this scoop tube aperture signal to spoon tube actuator 22.Signal amplitude scope is herein by system initial setting.
The controlling method that another aspect of the present invention provides a kind of speed of feedwater to regulate.Different from prior art, the process of carrying out proportion integration differentiation calculating in this controlling method is to complete in DCS, especially in the central processing unit of DCS, completes; On the other hand, directly carry out handshaking between DCS and spoon tube actuator, the control signal calculating (being scoop tube aperture signal) is directly sent to spoon tube actuator, and the latter's valve position feedback signal is directly delivered to DCS.Particularly, as shown in Figure 6, the step S11 of this controlling method is that Digitizing And Control Unit obtains rotational speed setup value signal and the speed feedback signal from the transmitter that tests the speed, at step S12 Digitizing And Control Unit, rotational speed setup value signal and speed feedback signal are carried out to proportion integration differentiation calculating, obtain scoop tube aperture signal (pid control algorithm of this computational process based on setting carries out), so that spoon tube actuator is according to the oil level of scoop tube aperture Signal Regulation hydraulic couplers, thereby the rotating speed of control feed water pump.
Another flow chart that Figure 7 shows that the controlling method of speed of feedwater adjusting, the process of carrying out proportion integration differentiation calculating in this controlling method is to complete in DCS.In step S21, what while judging by the control mode judging unit of DCS the rotating speed of controlling feed water pump, adopt is automatic control mode or manual control mode.Under different control modes, obtain rotational speed setup value signal according to difference.Step S22a, if automatic control mode, ARE regulator sends the first rotational speed setup value signal of its generation as the required rotational speed setup value signal (step S23a) of system to the tach signal acquiring unit of DCS.Step S22b, if manual control mode, obtain the second rotational speed setup value signal by the manual fixed value list unit of DCS according to operator's manual input and at step S23b using this second rotational speed setup value signal as the required rotational speed setup value signal of system.In next step S24, tach signal acquiring unit by Digitizing And Control Unit is obtained speed feedback signal, by the central processing unit of Digitizing And Control Unit, the first or second rotational speed setup value signal and speed feedback signal are carried out to proportion integration differentiation calculating at step S25, obtain scoop tube aperture signal; The pid control algorithm of this computational process based on setting carries out.In step S26, the scoop tube aperture signal of central processing unit output is carried out to amplitude limit operation, also judge whether scoop tube aperture signal exceeds signal amplitude scope.Only, in the situation that not exceeding, in step S27, transmit the definite scoop tube aperture signal of central processing unit to spoon tube actuator.At step S28 spoon tube actuator according to the oil level of this scoop tube aperture Signal Regulation hydraulic couplers, thereby control the rotating speed of feed water pump.
Control system of the present invention and method all complete logical process and the control to speed of feedwater in DCS; Owing to having cancelled the control cabinet of PLC on the spot of electrically driven feedpump, handshaking and controlling unit related in control procedure reduce, and not only reduce system response time, have also effectively improved the reliability of control system simultaneously.Meanwhile, the minimizing of control system equipment amount is conducive to controlling run and maintenance cost.
The foregoing is only the preferred embodiments of the present invention, its object does not also lie in the present invention's restriction or is constrained in above-mentioned implementation.All any amendments of within the scope of the invention the present invention being made and replacement all should be included in the scope of the claims in the present invention.
Claims (10)
1. a control system for nuclear power station electrically driven feedpump rotational speed regulation, comprises the Digitizing And Control Unit, spoon tube actuator, hydraulic couplers and the feed water pump that connect successively; It is characterized in that,
Described Digitizing And Control Unit comprises tach signal acquiring unit and central processing unit, and described tach signal acquiring unit is used for obtaining rotational speed setup value signal and speed feedback signal; Described central processing unit also obtains scoop tube aperture signal according to the logical process that described rotational speed setup value signal and described speed feedback signal are carried out, so as described spoon tube actuator according to the oil level of hydraulic couplers described in described scoop tube aperture Signal Regulation to control the rotating speed of described feed water pump.
2. the control system of nuclear power station electrically driven feedpump rotational speed regulation according to claim 1, it is characterized in that, described Digitizing And Control Unit also comprises control mode judging unit, and what while controlling the rotating speed of described feed water pump for judging, adopt is automatic control mode or manual control mode.
3. the control system of nuclear power station electrically driven feedpump rotational speed regulation according to claim 2, is characterized in that, described Digitizing And Control Unit comprises main feedwater flow controlled adjuster; In the time of the rotating speed of feed water pump described in adopting described automatic control mode control, described rotational speed setup value signal is that described main feedwater flow controlled adjuster produces, the first rotational speed setup value signal to described tach signal acquiring unit to be passed.
4. the control system of nuclear power station electrically driven feedpump rotational speed regulation according to claim 2, is characterized in that, described Digitizing And Control Unit comprises manual definite value unit; In the time of the rotating speed of feed water pump described in adopting described manual control mode control, described rotational speed setup value signal is that described manual definite value unit obtains, the second rotational speed setup value signal to described tach signal acquiring unit to be passed.
5. according to the control system of the nuclear power station electrically driven feedpump rotational speed regulation described in arbitrary claim in claim 1-4, it is characterized in that, described Digitizing And Control Unit also comprises amplitude limit unit; If described scoop tube aperture signal, within the scope of the signal amplitude of described amplitude limit unit, transmits described scoop tube aperture signal to described spoon tube actuator.
6. the control system of nuclear power station electrically driven feedpump rotational speed regulation according to claim 1, it is characterized in that, described Digitizing And Control Unit also comprises the spoon tube actuator valve position signal acquiring unit of the valve position feedback signal for receiving described spoon tube actuator.
7. a controlling method for nuclear power station electrically driven feedpump rotational speed regulation, is characterized in that, comprises the following steps:
Digitizing And Control Unit obtains rotational speed setup value signal and the speed feedback signal from the transmitter that tests the speed;
Digitizing And Control Unit obtains scoop tube aperture signal according to the logical process that described rotational speed setup value signal and described speed feedback signal are carried out, so as spoon tube actuator according to the oil level of described scoop tube aperture Signal Regulation hydraulic couplers to control the rotating speed of described feed water pump.
8. the controlling method of nuclear power station electrically driven feedpump rotational speed regulation according to claim 7, is characterized in that, before obtaining rotational speed setup value signal, described method is further comprising the steps of:
What while judging the rotating speed of controlling described feed water pump, adopt is automatic control mode or manual control mode;
If adopt described automatic control mode, described rotational speed setup value signal is the first rotational speed setup value signal producing by the main feedwater flow controlled adjuster in described Digitizing And Control Unit.
9. the controlling method of nuclear power station electrically driven feedpump rotational speed regulation according to claim 7, is characterized in that, before obtaining rotational speed setup value signal, described method is further comprising the steps of:
What while judging the rotating speed of controlling described feed water pump, adopt is automatic control mode or manual control mode;
If adopt described manual control mode, described rotational speed setup value signal is the second rotational speed setup value signal obtaining by the manual definite value unit in described Digitizing And Control Unit.
10. according to the controlling method of the nuclear power station electrically driven feedpump rotational speed regulation described in arbitrary claim in claim 7-9, it is characterized in that, described method also comprises carries out amplitude limit operation to described scoop tube aperture signal; If described scoop tube aperture signal, within the scope of signal amplitude, passes to described spoon tube actuator by described scoop tube aperture signal.
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| CN104076731A (en) * | 2014-07-03 | 2014-10-01 | 中广核工程有限公司 | Method, device and system for debugging nuclear power water feed pump rotational speed control system |
| CN104806534A (en) * | 2015-05-05 | 2015-07-29 | 上海阿波罗机械股份有限公司 | System for testing variable rotating speed performance of main water feed pump of nuclear power station |
| CN106014945A (en) * | 2016-05-30 | 2016-10-12 | 创世科研有限公司 | Precise control method of water outlet amount of micro water pump and micro water pump |
| CN106297925A (en) * | 2016-07-28 | 2017-01-04 | 董哲 | The water-supply scheme of a kind of multi-module type HTGR Nuclear Power Plant, dynamic model and regulation and control method |
| CN108716462A (en) * | 2018-04-13 | 2018-10-30 | 广东核电合营有限公司 | A kind of speed holding meanss and system for nuclear power feed pump group |
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| CN109681443A (en) * | 2018-11-20 | 2019-04-26 | 中广核研究院有限公司 | A kind of revolution speed control system and method for nuclear power station turbine driven feedwater pump |
| CN110058582A (en) * | 2019-04-15 | 2019-07-26 | 中广核研究院有限公司 | A kind of closed loop test method and test device of electrically driven feed pump revolution speed control system |
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| CN104076731A (en) * | 2014-07-03 | 2014-10-01 | 中广核工程有限公司 | Method, device and system for debugging nuclear power water feed pump rotational speed control system |
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| CN109116722A (en) * | 2017-06-23 | 2019-01-01 | 清华大学 | Intermodule Coordinated Control Scheme of the multi-module type nuclear power station with base load operation |
| CN109071021A (en) * | 2017-12-18 | 2018-12-21 | 深圳市大疆创新科技有限公司 | Sowing apparatus and its control method and plant protection drone |
| CN108716462A (en) * | 2018-04-13 | 2018-10-30 | 广东核电合营有限公司 | A kind of speed holding meanss and system for nuclear power feed pump group |
| CN108716462B (en) * | 2018-04-13 | 2020-07-28 | 广东核电合营有限公司 | Speed maintaining device and system for nuclear power water feed pump set |
| CN109681443A (en) * | 2018-11-20 | 2019-04-26 | 中广核研究院有限公司 | A kind of revolution speed control system and method for nuclear power station turbine driven feedwater pump |
| CN109681443B (en) * | 2018-11-20 | 2020-08-21 | 中广核研究院有限公司 | Rotation speed control system and method for steam-driven main feed pump of nuclear power station |
| CN110058582A (en) * | 2019-04-15 | 2019-07-26 | 中广核研究院有限公司 | A kind of closed loop test method and test device of electrically driven feed pump revolution speed control system |
| CN112343838A (en) * | 2019-08-08 | 2021-02-09 | 内蒙古伊泰煤制油有限责任公司 | Automatic control method and device for fan hydraulic coupler |
| CN112502958A (en) * | 2020-11-23 | 2021-03-16 | 岭东核电有限公司 | Nuclear power plant feed pump rotating speed fault diagnosis device and fault judgment method |
| CN113847265A (en) * | 2021-10-29 | 2021-12-28 | 山信软件股份有限公司 | Method for stabilizing rotating speed of air blower |
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| CN103867456B (en) | 2018-05-01 |
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Address after: 518023 No. 69 Shennan Middle Road, Shenzhen, Guangdong, Futian District Co-patentee after: CHINA GENERAL NUCLEAR POWER Corp. Patentee after: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. Address before: 518023 No. 69 Shennan Middle Road, Shenzhen, Guangdong, Futian District Co-patentee before: CHINA GUANGDONG NUCLEAR POWER GROUP Co.,Ltd. Patentee before: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. |