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1. 发明专利

JPH11148608A PRESSURIZED FLUIDIZED BED COMBINED POWER GENERATION SYSTEM AND ITS CONTROL METHOD 失效
公开(公告)号：JPH11148608A
公开(公告)日：1999-06-02
申请号：JP31476497
申请日：1997-11-17
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER , BABCOCK HITACHI KK
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , TOYAMA EIJI , YAMAMOTO YASUISA , TOKURA SUMIO , YOSHIMOTO SATOSHI
IPC分类号： F02C3/28 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To reduce a layer height operation amount per one time when a temperature change amount after the layer height operation exceeds a previously set maximum allowable change amount. SOLUTION: A title method comprises the steps of: recording in a layer temperature change recording device 17 a change in elapsed time of a layer temperature measured value, the layer temperature being measured by a layer temperature measuring unit 3, estimating with a subtractor 19 a temperature change amount between a layer temperature measured value upon starting the layer height operation and a minimum layer temperature measured value within a predetermined time after the layer height operation; calculating with a subtractor 20 that the temperature change amount exceeds a previously set maximum allowable change amount (temperature change set value); and altering a maximum or a minimum of a layer height deviation and correcting a layer height operation amount per one time with a hysteresis generator 13 to be smaller by altering a maximum or a minimum of a layer height deviation.

2. 发明专利

JPH09159108A LAYER HEIGHT CONTROL METHOD OF PRESSURIZED FLUIDIZED BED COMBUSTION DEVICE 失效
公开(公告)号：JPH09159108A
公开(公告)日：1997-06-20
申请号：JP32280195
申请日：1995-12-12
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , HOTTA NOBUHIRO , TOYAMA EIJI , YAMAMOTO YASUISA
IPC分类号： F23C10/28 , F22B1/02 , F23C10/16 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To make it possible to raise a layer height while stably controlling a vapor temperature within an allowable range when increasing the load of a pressurized fluidized bed combined generation system and increase the load while stably operating a plant. SOLUTION: A pulse signal 40, which is continuously generated with a definite breadth with time, is multiplied to a signal 39, which is turned ON when a layer height deviation signal exceeds a definite value, thereby outputting a pulse-like ON/OFF signal 41. On one hand, it is arranged to generate a layer temperature holding ON/OFF signal 44 by providing a function generator 7 which generates an ON signal only when a deviation signal between the layer temperature and a layer temperature setting value stays within a predetermined allowable value. A correction coefficient 42, which provides a layer height increase rate equivalent to a load change rate and the signals 41 and 44 are multiplied, thereby producing a control signal which controls an aeration gas flow rate which feeds fluid medium particles to a fluidized bed.

3. 发明专利

JPH1144410A PRESSURIZED FLUIDIZED-BED COMPOSITE GENERATING SYSTEM AND METHOD AND APPARATUS FOR CONTROLLING IT 失效
公开(公告)号：JPH1144410A
公开(公告)日：1999-02-16
申请号：JP19806297
申请日：1997-07-24
申请人： HITACHI LTD , BABCOCK HITACHI KK , CHUGOKU ELECTRIC POWER
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , HOTTA NOBUHIRO , TOYAMA EIJI , YAMAMOTO YASUISA , YOSHIMOTO SATOSHI , KIMURA KOJI
IPC分类号： F01K23/10 , F22B1/02 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To operate a fuel amount even according to a layer temperature with relativeness between a system for operating the fuel amount based on steam temperature and a system for operating a layer height based on the layer temperature. SOLUTION: The method for controlling a pressurized fluidized-bed composite generating system comprises the steps of generating a fuel amount target value 108 based on a fuel amount set value 106 generated from a functional generator 74, generating a fuel amount command value 110 according to the value 108, operating a coal charging amount in a fuel supply line according to the value 110, and correcting the operating amount according to an output from a controller 72 so that a deviation of the actual steam temperature from the set value becomes zero. Further, the method comprises the steps of correcting a layer height set value generated from a functional generator 96 in response to a deviation of the actual layer temperature from a set value by an adder 94, and operating the layer height based on the corrected layer height command value 116. And, the method also comprises the steps of outputting a signal responsive to a deviation of the actual layer temperature from the set value from a controller 86 to an adder 78 in response to a switching signal 113 from a condition deciding unit 90 to correct the value 110.

4. 发明专利

JPH10227411A METHOD FOR CONTROLLING PRESSURIZED FLUIDIZED BED COMPLEX POWER GENERATING SYSTEM AND REPRESSURIZED FLUIDIZED BED COMPLEX POWER GENERATING SYSTEM USING THE SAME 失效
公开(公告)号：JPH10227411A
公开(公告)日：1998-08-25
申请号：JP2888997
申请日：1997-02-13
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , TOYAMA EIJI , YAMAMOTO YASUISA
IPC分类号： F01K23/06 , F02C3/28 , F22B1/02 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To shorten a stable time of a plant and keep a stable state when a bed temperature (or a steam temperature) of a pressurized fluidized bed complex power generating system is controlled by handling a bed height. SOLUTION: When a difference value between a bed temperature and a set bed temperature indicated by a deviation signal 5 is within a non-sensitive range, a bed height target value is corrected with a deviation between a measured bed height value 10 and a target bed height value 9 being applied as a biasing signal. The corrected bed height target value 9 becomes equal to a measured bed height value 10, and a bed height deviation 12 becomes zero. In the case tint a difference value between a bed temperature and a set bed temperature value is in a non-sensitive range, i.e., a bed temperature is in a specified temperature range, if the deviation 12 is set to 0, an accidental bed height operation is not carried out even if the bed height measured value is vibrated when the plant is stabilized, resulting in that the stable state of the plant is maintained and further a delay in bed height operation can be prevented and a stabilization of the plant can be made fast.

5. 发明专利

JPH08200601A FLUIDIZED BED POWER PLANT, CONTROLLER THEREOF AND CONTROLLING METHOD THEREFOR 失效
公开(公告)号：JPH08200601A
公开(公告)日：1996-08-06
申请号：JP692695
申请日：1995-01-20
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： SATO YOSHIO , NOMURA MASAHIDE , YAMAMOTO YASUISA , TOYAMA EIJI
IPC分类号： F22B1/02 , F01K23/06
摘要： PURPOSE: To improve the load followability and the plant efficiency by individually controlling the temperatures of main steam and reheat steam according to burning quantities by using at least two fluidized bed boilers for generating the main steam and the reheat steam. CONSTITUTION: Feed water absorbs heat by HRHE, is overheated to a predetermined temperature by a vaporizer inserted into a fluidized bed boiler PFBC-A, introduced to a high-pressure steam turbine HP-ST, the steam is further reoverheated by a reheater inserted to a fluidized bed boiler PFBC-B, and introduced to a low-pressure steam turbine LP-ST. A main steam temperature set value is decided by a main steam temperature setter 150, compared with a main steam temperature detected value 704 to obtain a main steam temperature deviation value 153, and a fuel flow rate corrected value 156 is obtained. A fuel flow rate precedence command value 160 and a fuel flow rate corrected value 156 are added by a corrector 162 to become a main steam side fuel flow rate demand 164. On the other hand, a reheat steam temperature control system realizes the control by substantially the same algorithm.

6. 发明专利

JPH07210208A AUTOTUNING METHOD FOR THERMAL POWER PLANT AND THERMAL POWER PLANT CONTROLLER UTILIZING THE SAME 失效
公开(公告)号：JPH07210208A
公开(公告)日：1995-08-11
申请号：JP174294
申请日：1994-01-12
申请人： HITACHI LTD
发明人： YOKU YURIO , TOYAMA EIJI
IPC分类号： F01K13/00 , F22B35/00 , G05B11/32 , G05B13/02 , G05D23/19 , G06F15/18 , G06N3/00
摘要： PURPOSE:To automatically execute control at the time of increasing/ decreasing the output of a thermal power plant with high precision by performing learning so as to minimize the output of a feedback system and adjusting the preceding signal of a feed forward system corresponding to this learning. CONSTITUTION:While inputting time (t) synchronized with a power generating request amount MWD, a neural network 23 outputs plural preceding signals BIRWF 24 and BIRFF 25. The time point to apply these preceding signals is set just after respective PI computing elements 2 and 3 so as to be matched with a neural learning principle. The signals to specify static characteristics (such as the power generating request amount MWD corresponding to main steam pressure control and an output signal FRD of a function generator corresponding to main steam temperature control) are impressed behind the output signal of the neural network 23. The neural network 23 is composed of three layers of an input layer, intermediate layer and output layer, and the number of neurons at the input and output layers is set at one but the number of neurons at the intermediate layer is not especially specified but varied corresponding to learning speed and accuracy.

7. 发明专利

JPH0395602A CONTROL METHOD FOR CONTROLLER 失效
公开(公告)号：JPH0395602A
公开(公告)日：1991-04-22
申请号：JP23160589
申请日：1989-09-08
申请人： HITACHI LTD
发明人： NOMURA MASAHIDE , SAITO TADAYOSHI , TOYAMA EIJI , YOKOGAWA NOBUYUKI
IPC分类号： G05B13/02 , G05B13/04
摘要： PURPOSE:To shorten the time required for construction of a control rule by estimating the parameter of a standard model of a control system and controlling the parameter of a controller so as to obtain the desired model parameter. CONSTITUTION:A parameter control system 3 approximates a system obtained by combining a controller 2 and a control subject 1, i.e., a control system with a standard secondary system model and measures the step answer of the control system. Then the system 3 estimates the attenuation coefficient and the natural angle frequency of the control system based on the measurement result of the step answer. The control parameter of the controller 2 is controlled so as to obtain the desirable attenuation coefficient and natural angle frequency of the control system. As a result, the quantitative estimation is possible even though an error is produced by the approximation. Then a control rule is constructed in a short time.

8. 发明专利

JPS63131918A COMBUSTION CONTROL DEVICE FOR BOILER 失效
公开(公告)号：JPS63131918A
公开(公告)日：1988-06-03
申请号：JP27816786
申请日：1986-11-21
申请人： HITACHI LTD
发明人： TOYAMA EIJI
IPC分类号： F22B35/00 , F23N1/02
摘要： PURPOSE:To prevent the flame failure of a burner caused by manual maloperation by a method wherein a control circuit is installed in response to each burner stage and at the time of an excess fuel flow rate an operation mode for a fuel flow rate is forcibly switched to a manual operation mode to control the fuel flow rate for each burner individually. CONSTITUTION:To keep the necessary minimum excess air ratio Xs for combustion, a set value for this ratio Xs is included into a function generator 100 and watched by a monitor relay 107, and when an actual flow rate becomes larger than a fuel demand, a switch operation part 108 for automatic-manual operation is switched to a manual mode and a manually operated analog memory 108 is forcibly throttled. When the fuel flow rate further increases and the air ratio becomes lower than an air ratio of 0.6 which is necessary minimum to hold flames, the air ratio is monitored by a monitor relay 109 and a valve 110 for stopping fuel is folly closed and only the burner stage concerned is tripped to prevent the trip of the whole boiler and the explosion of the boiler. For setting the air ratio necessary minimum to hold flames, a weighing device 112 is not used, but the sensitivity of the relay 109 itself may be utilized to set the ratio.

9. 发明专利

JPS6131814A Air flow control apparatus for boiler 失效
标题翻译：锅炉空气流量控制装置
公开(公告)号：JPS6131814A
公开(公告)日：1986-02-14
申请号：JP15311484
申请日：1984-07-25
申请人： Hitachi Ltd
发明人： KOMADA TADASHI , SUGANO AKIRA , TOYAMA EIJI
IPC分类号： F23N3/06 , F22B35/00 , F23N1/02 , F23N3/08 , F23N5/00 , F23N5/18
CPC分类号： F23N1/022 , F23N5/003 , F23N5/18 , F23N2033/06 , F23N2035/06
摘要： PURPOSE:To prevent an air fan from entering into its surging range during a transient time from starting a boiler to its normal operation by a method wherein a required air flow rate is distributed by splitting it into a wind box and NO port on the basis of air- flow. CONSTITUTION:The instructions for the total air flow rate are prepared by a high power input selector 14, compared with an actual flow rate 16 and the control signals of the proportional integrator 17 are distributed to each stage of wind box 4 and NO port damper 7. While flow control to the damper 5 at the entrance of the wind box is made by the control signal through a high power input selector 25. Flow rate of NO port damper 7 under the loading zone is set by a function generator 26 for its ratio. Before pulling-in operation with a generator, flow rate is decided by a function generator 28 employing data of total fuel volume 27, being compared with NO port air flow rate 30, and flow control of NO port damper 7 is made by the proportional integrator 31. As described above, the air flow control system is utilizing wind box and NO port damper, covering the operation range from its starting to normal operation on the basis of air flow volume, therefore it is possible for air fan to avoid entering into the surging zone, and an outlet pressure of FDF2 is always made controllable by a moving blade of FDF2.
摘要翻译：目的：为了防止风扇在从启动锅炉到正常运行的瞬间过程中进入其浪涌范围，其方法是通过将所需的空气流量分配成风箱和NO端口来分配所需的空气流量气流。构成：与实际流量16相比，由大功率输入选择器14准备总空气流量的说明，比例积分器17的控制信号分配到风箱4和NO端口风门7的各级通过高功率输入选择器25通过控制信号对风箱入口处的阻尼器5进行流量控制。负载区域下方的NO端口阻尼器7的流量由功能发生器26设定，其比例。在使用发电机进行拉入操作之前，通过利用总燃料量27的数据的函数发生器28判定流量，与NO口空气流量30进行比较，NO口阻尼器7的流量控制由比例积分器如上所述，空气流量控制系统正在利用风箱和NO端口阻尼器，其基于空气流量从其开始到正常操作覆盖操作范围，因此风扇可以避免进入浪涌区域，FDF2的出口压力始终由FDF2的动叶片控制。

10. 发明专利

JP2000039103A CONTROLLER FOR ELECTRIC POWER PLANT 失效
公开(公告)号：JP2000039103A
公开(公告)日：2000-02-08
申请号：JP20607398
申请日：1998-07-22
申请人： HITACHI LTD
发明人： YAMADA AKIHIKO , OUCHI KAZUNORI , NOMURA MASAHIDE , SATO YOSHIO , KIMURA TORU , SHIMIZU SATORU , TOYAMA EIJI
IPC分类号： F01K13/02 , F22B35/00 , G05B11/32 , G05B11/36 , G05B13/02
摘要： PROBLEM TO BE SOLVED: To appropriately make the automatic adjustment of dynamic feedforward control signals by taking the influence of mutual intervention into consideration, by calculating an overall evaluation index by calculating the characteristic amounts of the temperature values of steam measured at a plurality of spots along the flow passage of the steam, and changing a plurality of feedforward control signals based on the index. SOLUTION: A data converting function 410 receives the outlet temperature 201 of a primary superheater, temperature 202 of main steam, temperature 203 of reheated steam, and target values 511-513, and processes the received data for extracting each feature. Then an overall evaluation index generating function 425 composes a plurality of characteristic amounts extracted by means of a characteristic amount extracting function 420 into several evaluation indexes, by taking the interactions among the characteristic amounts into consideration. A boiler input amount command (BIR) correcting function 430 calculates a BIR correction factor, by computing the generated evaluation indexes as the antecedent section of a fuzzy rule 432 by means of a fuzzy inference function 431. Therefore, dynamic feedforward control signals can be adjusted appropriately by taking the influence of mutual interventions into consideration.

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