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1. 发明专利

JPH0295136A POWER SYSTEM MONITORING SYSTEM 失效
公开(公告)号：JPH0295136A
公开(公告)日：1990-04-05
申请号：JP24123788
申请日：1988-09-27
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , SATO MASAHIRO , AOYANAGI MARI
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To easily obtain the unstable point of a voltage by designating conditions at the buses of a power system to obtain a stable point, updating the amplitude of the voltage, so updating a phase angle as to become a load power invariable, and calculating 1 tide until the unstable point is sequentially obtained with them as an initial value. CONSTITUTION:System information from a power system 1 is input to an electronic computer 4 through information transmitters 2-1, 2-1, a tide is calculated on the basis of the information to display stable and unstable points of the system voltage. Here, a tide is calculated on the basis of the information collected from the system 1 to obtain an initial stable point, and the tide is again calculated by varying the amplitude, phase angle of the voltages of the buses of the stable point. If the variation in the voltage is small, it is converged to the stable point, while if the variation in the voltage becomes larger than a predetermined value, it is converged to the unstable point. Thus, the stable point and the corresponding unstable point can be easily obtained.

2. 发明专利

JPH02101929A MONITOR AND CONTROL SYSTEM FOR ELECTRIC POWER SYSTEM 失效
公开(公告)号：JPH02101929A
公开(公告)日：1990-04-13
申请号：JP25114988
申请日：1988-10-05
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , MIZUGUCHI SHIGENORI
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To perform a safety operation by finding the actual condition of an apparatus through voltage data from a power monitoring system, by judging the further stability of said apparatus from past results and demand forecast results, and by displaying the regulated time and regulated quantity when instability is forecast. CONSTITUTION:Measuring information such as voltage, current, active power, reactive power, power flow, opened and closed state of breaker and disconnector, and tapping position of a transformer is detected from an electric system 1. An information transmission device 2-1 transmits an inputted information via transmission path 3 to an information transmission device 2-2 on the center side and inputs said information to an electronic computer 4. Said electronic computer 4 forecasts the state of said electric system after several minutes or several hours on the basis of present and past data to obtain voltage stability data. When instability is forecast, the regulated time and regulated quantity for avoiding said instability are obtained and computing results are displayed on a man-machine interface. Thus, the monitoring and operation of high quality of the electric system is conducted by an operator.

3. 发明专利

JPH0255528A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255528A
公开(公告)日：1990-02-23
申请号：JP20594388
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , KUDOU MORIMASA , SAKUGI TSUYOSHI , SATO MASAHIRO
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To feed power stably by displaying an effect quantity and a regulating quantity based on present and future voltage stable-thresholds. CONSTITUTION:In a line state determining processing means S10, by using the measured information of the power system 1 input through an information transmitting device 2-1, the state value of the power system 1 is found. In a future system state estimating processing means S20, by a general demand estimating data, a future state is determined. In a stability threshold computation processing means S30, the results of the previous processing means S10, S20 are set to be initial values and the stable threshold of voltage is found. In a stability monitoring processing means S40, the results of the previous processing means S10, S20, S30 are used, and in an effect quantity computation processing means S50, the results of the previous processing means S10, S20 are used, respectively, and the stability and effect quantity of the present and future power system 1 are found. In a regulating quantity computation processing means S60, the results of the previous processing means S40, S50 are used, and the regulating quantity of a voltage regulating equipment required for stabilizing present and future system voltage is found, and in an output processing means S70, various data as the results of the previous processing are displayed on an MMI device 5.

4. 发明专利

JPH0255531A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255531A
公开(公告)日：1990-02-23
申请号：JP20594688
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , ICHIKAWA TADASHI , SATO MASAHIRO , SUZUKI WAKAKO
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To feed the power of high quality by controlling voltage precedently on a power. CONSTITUTION:In a line information transmitting processing S10, various measured values for showing the state of a power system 1 measured at respective sections are collected. By a system state determining processing means S20, through the measured value of the previous processing means S10, the state of the power system 1 is determined, and by a future system state estimating processing means S30, a system state at a future time point is determined based on the result of the previous processing means S20. By a stability threshold computation processing means S40, the result of the previous processing means S30 is set to be an initial result and a voltage stable-threshold is found, and by a stability monitoring processing means S50, the results of the previous processing means S30, S40 are used, and the voltage stability of the future power system 1 is discriminated, and when it is discriminated that the voltage is unstable, then by a control quantity computation processing means S60, the results of the previous processing means S30 and S50 are used, and a controlled equipment and control quantity for stabilizing future system voltage are found, and by a control quantity transmitting processing means S70, the control quantity is transmitted to the controlled equipment and is controlled. Finally, from an output processing means S80, the output of the various results of the previous processing means S20-S60 is directed to an MMI device 5.

5. 发明专利

JPH0255527A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255527A
公开(公告)日：1990-02-23
申请号：JP20594288
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , EHATA YOSHIO , KUDOU MORIMASA , SATO MASAHIRO
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To obtain an apparatus for enabling stable operation of a power system by finding a control quantity for improving stability based on the stable threshold of voltage. CONSTITUTION:Measured values with respect to a power system 1 are inputted through an information transmitting device 2. The measured values including errors are used to determine the most accurate state value in a system state decision processing S10. In a stability threshold computation processing S20, the result of the previous processing S10 is set to be an initial value, and the stable threshold of voltage is found. In a stability monitoring processing S30, the results of previous processing S10, S20 are used, and the stability of the present power system 1 is discriminated. If it is discriminated that the line is unstable, the result of the previous processing S30 is used in control quantity computation processing S40 and the control quantity of a controlled equipment required for stabilizing line voltage is found. From control quantity transmitting processing S50, the control quantity of the previous processing S40 is transmitted to the controlled equipment in the power system 1, and the equipment to be controlled is controlled.

6. 发明专利

JPH0255530A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255530A
公开(公告)日：1990-02-23
申请号：JP20594588
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , KOYANAGI KAORU , SAKUGI TSUYOSHI , KUDOU MORIMASA
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To feed stable power by displaying an effect quantity and a regulating quantity based on the stable threshold of voltage. CONSTITUTION:Information of the power system 1 is inputted through an information transmitting device 2-1, and determined in a system state decision processing S10. By an assumed fault system simulation processing S20, prepared assumed faults are selected in the order of high frequency and are simulated. In a voltage stability threshold computation processing S30, the results of the previous processings S10 and S20 are set to be initial values and a voltage stability threshold is found. In a stability monitoring processing S40, the results of the previous processings S10, S20, and S30 are used and the state of the stability of the present power system 1 is discriminated. In an effect quantity computation processing S50, the results of the previous processings S10 and S20 are used and an effect quantity for heightening voltage stability is found by a voltage regulating equipment, and in a regulating quantity computation processing S60, the results of the previous processings S40 and S50 are used and a regulating quantity necessary for stabilizing voltage when it is unstable is found. Finally, in output processing S70 and transmitting processing S80, the various results of the previous processings are displayed on an MMI device 5, and at the same time, the regulating quantity is transmitted to an operator.

7. 发明专利

JPH0255529A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255529A
公开(公告)日：1990-02-23
申请号：JP20594488
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , KOYANAGI KAORU , SAKUGI TSUYOSHI , SUZUKI WAKAKO
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To obtain a system for monitoring and using the power system of high quality by displaying the voltage stable-threshold of the system voltage of an assumed fault system. CONSTITUTION:Measured values with respect to a power system 1 are inputted through an information transmitting device 2-1. The measured values including errors are used to determine the state of the power system 1 in a system state decision processing S10. In an assumed fault system simulation processing S20, among prepared assumed kinds of faults, the kinds of high frequency generated in existing systems are simulated. In a stability threshold computation processing S30, voltage stable-thresholds for the preset system created in the previous processing S10 and the assumed fault system created in the previous processing S20 are found. In a stability monitoring processing S40, the results of the previous processings S10, S20 and S30 are used, and the states of the stability of the respective systems are discriminated, and by an output processing 50, various data of the results of the previous processings are displayed on an MMI device 5.

8. 发明专利

JPH0255526A POWER SYSTEM MONITORING CONTROL APPARATUS 失效
公开(公告)号：JPH0255526A
公开(公告)日：1990-02-23
申请号：JP20594188
申请日：1988-08-19
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： SUZUKI MAMORU , AMAMIYA MASAHIKO , KATO TOSHIO , SAKUGI TSUYOSHI , SATO MASAHIRO , KISHIDA YUKIO
IPC分类号： H02J3/00 , H02J13/00
摘要： PURPOSE:To obtain a system for enabling high quality monitoring and operation of a power system by displaying an effect quantity and a regulating quantity based on the stable threshold of voltage. CONSTITUTION:Measured values with respect to a power system 1 are inputted through an information transmitting device 2-1. The measured values including errors are used to determine the information of the power system in a system state decision processing S10. By a voltage stability threshold computation processing S20, the result of the previous processing S10 is used as an initial value, and the stability threshold of voltage is found. In a stability monitoring processing S30, the results of the previous processing S10, S20 are used, and the state of the voltage stability of the present power system 1 is discriminated, and in an effect quantity computation processing S40, the result of the previous processing S10 is used, and with a voltage regulating equipment, an effect quantity for heightening the voltage stability is found. By a regulating quantity computation processing S50, the results of the previous processing S30, S40 are used, and a regulating quantity required for making the unstable state of system voltage stable is found, and finally, by an output processing S60, various data of the results of the previous respective processing are displayed on an MMI device 5.

9. 发明专利

JPH03212702A DEMAND FORECAST SUPPORTING SYSTEM 失效
公开(公告)号：JPH03212702A
公开(公告)日：1991-09-18
申请号：JP932990
申请日：1990-01-18
申请人： TOKYO ELECTRIC POWER CO
发明人： OHASHI TOSHIAKI , MUTO SHOICHI , AMAMIYA MASAHIKO , MIYAGAWA FUMIO
IPC分类号： H02J3/00 , G05B13/02
摘要： PURPOSE:To attain the automation and rapid operation of forecasting work and to improve the accuracy of forecasts by converting various experiences and knowledge into knowledge bases and using the knowledge base for inference to execute statistic processing. CONSTITUTION:Data necessary for a forecast are inputted from an input part 15. An inference mechanism 13 selectively controls knowledge necessary for the control knowledge 141 of a knowledge base part 14. In the initial processing, the input data are judged, weekday reference forecasting knowledge 142 or specific day reference forecasting knowledge 143 is selected in accordance with a weekday or a specific day on the forecasting day and selects a forecasting system based upon the selected knowledge. Then, forecasting value calculating processing is executed based upon the selected forecasting system. The forecasting value calculating processing calculates the post data stored in an actual data part 12 based upon the selected forecasting value calculating processing. When necessary, the forecasted value is corrected by correction knowledge held by forecasted value correcting knowledge 144. Finally, the forecasted value is evaluated by evaluation knowledge 145. The obtained evaluation value of the forecasted value (f) is outputted to an outputted part 16 and displayed.

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