Automatic statistical method based on specific operation condition time of large hydropower station unit

Abstract

The invention relates to an automatic statistical method based on specific operation condition time of a large hydropower station unit. A water-turbine generator set is divided into four working conditions of operation, hot standby, cold standby and maintenance according to different working conditions of the water-turbine generator set. According to the method, classified statistics is carried out according to the states of a circuit breaker, an isolating switch and a circuit breaker high and low voltage side grounding knife-switches, data such as active power, rotating speed, stator current and stator voltage of the water-turbine generator set and stability indexes such as vibration, throw and pressure pulsation, and the duration of four working conditions of operation, hot standby, cold standby and maintenance of the water-turbine generator set is calculated; the water-turbine generator set has all running time, full running time and specific load running time; the operation time of the water-turbine generator set in the vibration area is long. The duration of various states of the equipment can be accurately and comprehensively counted, and the utilization efficiency of data is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic turbine assistance, and in particular to an automatic statistical method based on specific operating condition time of units in large hydropower stations. Background Art

[0002] Hydro-turbine generator sets are divided into four operating conditions according to their operating conditions: operation, hot standby, cold standby and maintenance.

[0003] The operating status of the hydro-turbine generator set means that the circuit breaker and the isolating switch of the hydro-turbine generator set are in the closed position; the hot standby status means that the circuit breaker of the hydro-turbine generator set is in the disconnected position, while the isolating switch is still in the closed position; the cold standby status means that the circuit breaker and the isolating switch of the hydro-turbine generator set are in the disconnected position; the maintenance status means that the circuit breaker and the isolating switch of the hydro-turbine generator set are disconnected, and the grounding switches on both sides of the maintenance equipment (such as the circuit breaker) are closed.

[0004] The current operating conditions of the hydro-turbine generator set are divided into operating and stopping time according to the manually registered hydro-turbine generator set start-up time, circuit breaker opening and closing time, and hydro-turbine generator set complete stop time.

[0005] The disadvantages of the existing technology are as follows: 1. Manually recording the time when the turbine generator set is ordered to start up, the time when the circuit breaker is opened and closed, and the time when the turbine generator set is completely stopped may result in incorrect statistical time due to registration errors; 2. When registering the time when the turbine generator set is ordered to start up, the time when the circuit breaker is opened and closed, and the time when the turbine generator set is completely stopped, only the operation and shutdown time can be distinguished, and the three operating conditions of hot standby, cold standby, and maintenance are not distinguished; 3. No relevant statistics are performed on the relevant time of the turbine generator set operating in the vibration zone. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an automatic statistical method based on the specific operating condition time of large hydropower station units, which can accurately and comprehensively count the duration of various states of equipment and improve the utilization efficiency of data.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] An automatic statistical method based on the specific operating condition time of large hydropower station units, comprising:

[0009] The circuit breakers, disconnectors, grounding switch status on the high and low voltage sides of the circuit breakers, active power, speed, stator current and stator voltage data of the hydro-turbine generator sets, as well as the stability index parameters vibration, swing and pressure pulsation are classified and counted, and the duration of the four operating conditions of the hydro-turbine generator sets, namely operation, hot standby, cold standby and maintenance, is calculated; the duration of full operation, full power generation and specific load operation of the hydro-turbine generator sets; and the duration of operation in the vibration zone of the hydro-turbine generator sets.

[0010] The method for judging the operating state of the above-mentioned hydro-generating unit is as follows:

[0011] When the circuit breaker is closed and the rotational speed > 95% of the rated rotational speed are satisfied simultaneously, the first operating judgment factor is established. When the active power P > the set operating power value P1 and the stator current I1 > the set operating current I0 are satisfied simultaneously, the second operating judgment factor is established;

[0012] When either the first operating judgment factor or the second operating judgment factor is established, the third operating judgment factor is established;

[0013] When the stator voltage U1 > 90% of the rated voltage U n and the terminal voltage U2 > 90% of the rated voltage U n When one of them is satisfied, the fourth operating judgment factor is established;

[0014] When the third operating judgment factor and the fourth operating judgment factor are established simultaneously, the hydro-generating unit is in the operating state.

[0015] The method for judging the hot standby state of the above-mentioned hydro-generating unit is as follows:

[0016] When the circuit breaker is open, the disconnecting switch is closed, the high-voltage earthing switch of the circuit breaker is open, and the low-voltage earthing switch of the circuit breaker is open are satisfied simultaneously, the hydro-generating unit is in the hot standby state.

[0017] The method for judging the cold standby state of the above-mentioned hydro-generating unit is as follows:

[0018] When the circuit breaker is open, the disconnecting switch is open, the high-voltage earthing switch of the circuit breaker is open, and the low-voltage earthing switch of the circuit breaker is open are satisfied simultaneously, the hydro-generating unit is in the cold standby state.

[0019] The method for judging the maintenance state of the above-mentioned hydro-generating unit is as follows:

[0020] When either the high-voltage earthing switch of the circuit breaker is closed or the low-voltage earthing switch of the circuit breaker is closed is satisfied, the hydro-generating unit is in the maintenance state.

[0021] The method for calculating the duration of the four operating conditions of the hydro-generating unit, namely operation, hot standby, cold standby, and maintenance, is as follows:

[0022] After judging that a hydro-generating unit is in the operating state, record the time T1. After judging that it is in the hot standby state, record the time T2. After judging that it is in the cold standby state, record the time T3. After judging that it is in the maintenance state, record the time T4;

[0023] When T1 < T2, operation transfers to hot standby, T 运行时长= T2 - T1; When T1 > T2, it is in hot standby transfer to running state, T 热备用时长1 = T1 - T2;

[0024] When T2 < T3, it is in hot standby transfer to cold standby, T 热备用时长2 = T3 - T2; When T2 > T3, it is in cold standby transfer to hot standby, T 冷备用时长1 = T2 - T3;

[0025] When T3 < T4, it is in cold standby transfer to maintenance, T 冷备用时长2 = T3 - T4, When T3 > T4, it is in maintenance transfer to cold standby, T 检修时长 = T3 - T4;

[0026] According to the chronological order of timing, the operation duration, hot standby duration, cold standby duration, and maintenance duration of a hydro-generator unit can be calculated, and the monthly and annual durations can be calculated according to requirements.

[0027] The calculation methods for the total operation duration, full-load duration, and operation duration at a specific load of the above-mentioned hydro-generator units are as follows:

[0028] The operation duration at a specific load is the operation duration when the active power of the unit is greater than P2, where P2 is a set value;

[0029] The method for judging the total operation state of the hydro-generator unit is:

[0030] When the first hydro-generator unit is in the running state, the second hydro-generator unit is in the running state,..., and the nth hydro-generator unit is in the running state are all satisfied simultaneously, it is the total operation state of the hydro-generator units, where n is the number of hydro-generator units;

[0031] When it is judged that the hydro-generator units are in the total operation state, record the time T5. After that, when any hydro-generator unit changes from the running state to the hot standby state, record the time T6, and then the total operation duration T of the hydro-generator units in this hydropower station can be calculated 机组全部运行时长 = T6 - T5;

[0032] Record the time T7 when the total active power of the hydro-generator units in the hydropower station reaches the rated output, and record the time T8 when the total power of the hydro-generator units in the power station is lower than the rated output. Calculate the full-load operation duration T of the hydro-generator units in this hydropower station 机组满发运行时长 = T8 - T7;

[0033] Record the time T9 when the total active power of the hydro-generator units in the hydropower station reaches P2, and record the time T when the total output of the hydro-generator units in the power station is lower than P2 10 , and then the operation duration T when the output of the hydro-generator units in this hydropower station is greater than P2 can be calculated 机组出力大于P运行时长 = T 10 - T9.

[0034] The calculation method for the above-mentioned operation time of the hydro-generator set in the vibration zone is:

[0035] When one of the following conditions is met: the vibration amplitude of the turbine generator set is greater than the set vibration alarm value, the swing amplitude is greater than the set swing alarm value, and the pressure pulsation amplitude is greater than the set pressure pulsation alarm value, and the accumulated time reaches the set time, the turbine generator set operates in the vibration zone;

[0036] When the turbine generator set is judged to be in the vibration zone, record the time T 11 , record the time T when the turbine generator set returns to the operating state in the vibration zone 12 , the operation time T of this turbine generator set in the vibration zone can be calculated 机组振动区运行时长 =T 12 -T 11 .

[0037] The invention provides an automatic statistical method based on the specific operating condition time of a large hydropower station unit. The method classifies and statistics the circuit breaker, disconnector, grounding knife switch status on the high and low voltage sides of the circuit breaker, active power, rotation speed, stator current, stator voltage, head and other data of the hydro-generator unit, and stability indicators such as vibration, swing, and pressure pulsation. The method calculates the duration of four operating conditions of the hydro-generator unit, namely, operation, hot standby, cold standby, and maintenance; the duration of all operation, full operation, and specific load operation of the hydro-generator unit; and the duration of operation in the vibration zone of the hydro-generator unit. The method can accurately and comprehensively count the duration of various equipment states, thereby improving the utilization efficiency of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0039] Figure 1 It is the logic diagram of the conditions for judging the operating status of the hydro-generator set;

[0040] Figure 2 It is a logic diagram for judging the hot standby state of a hydro-generator set;

[0041] Figure 3 It is a logic diagram for judging the cold standby state of a hydro-generator set;

[0042] Figure 4 It is the logic diagram of the maintenance status judgment condition of the hydro-generator set;

[0043] Figure 5 It is the logic diagram for judging the operating conditions of all the hydro-generator sets;

[0044] Figure 6 This is the logic diagram for judging the conditions for the operation of the hydro-generator set in the vibration zone. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] An automatic statistical method based on the specific operating condition time of large hydropower station units, comprising:

[0047] The circuit breakers, disconnectors, grounding switch status on the high and low voltage sides of the circuit breakers, active power, speed, stator current and stator voltage data of the hydro-turbine generator sets, as well as the stability index parameters vibration, swing and pressure pulsation are classified and counted, and the duration of the four operating conditions of the hydro-turbine generator sets, namely operation, hot standby, cold standby and maintenance, is calculated; the duration of full operation, full power generation and specific load operation of the hydro-turbine generator sets; and the duration of operation in the vibration zone of the hydro-turbine generator sets.

[0048] The above-mentioned method for judging the operating status of the hydro-generator set is:

[0049] When the circuit breaker is closed and the speed is greater than 95% of the rated speed, the first judgment factor is established. When the active power P is greater than the set operating power value P1 and the stator current I1 is greater than the set operating current I0, the second judgment factor is established.

[0050] When one of the first judgment factor and the second judgment factor is satisfied, the third judgment factor is satisfied;

[0051] When stator voltage U1>90% rated voltage U n The terminal voltage U2>90% rated voltage U n When one of them is satisfied, the fourth judgment factor is established;

[0052] When the third operation judgment factor and the fourth operation judgment factor are both met, the hydro-generator set is in operation.

[0053] The above-mentioned method for judging the hot standby state of the hydro-generator set is:

[0054] When the circuit breaker is open, the disconnector is closed, the grounding switch on the high-voltage side of the circuit breaker is open, and the grounding switch on the low-voltage side of the circuit breaker is open at the same time, the turbine generator set is in hot standby state.

[0055] The cold standby state judgment method of the above-mentioned hydro-generator set is:

[0056] When the circuit breaker is open, the disconnector is open, the grounding switch on the high-voltage side of the circuit breaker is open, and the grounding switch on the low-voltage side of the circuit breaker is open at the same time, the turbine generator set is in cold standby state.

[0057] The above-mentioned method for judging the maintenance status of the hydro-generator set is:

[0058] When one of the closing of the grounding switch on the high-voltage side of the circuit breaker and the closing of the grounding switch on the low-voltage side of the circuit breaker is satisfied, the hydro-generating unit is in the maintenance state.

[0059] The above method for calculating the operation time, hot standby time, cold standby time, and maintenance time of the hydro-generating unit is as follows:

[0060] After determining that a hydro-generating unit is in the operating state, record the time T1; after determining that it is in the hot standby state, record the time T2; after determining that it is in the cold standby state, record the time T3; after determining that it is in the maintenance state, record the time T4.

[0061] When T1 < T2, the operation state changes to hot standby, and T 运行时长 = T2 - T1; when T1 > T2, the hot standby state changes to operation, and T 热备用时长1 = T1 - T2;

[0062] When T2 < T3, the hot standby state changes to cold standby, and T 热备用时长2 = T3 - T2; when T2 > T3, the cold standby state changes to hot standby, and T 冷备用时长1 = T2 - T3;

[0063] When T3 < T4, the cold standby state changes to maintenance, and T 冷备用时长2 = T3 - T4; when T3 > T4, the maintenance state changes to cold standby, and T 检修时长 = T3 - T4;

[0064] According to the chronological order of timing, the operation time, hot standby time, cold standby time, and maintenance time of a hydro-generating unit can be calculated, and the monthly and annual times can be calculated according to requirements.

[0065] The above calculation methods for the total operation time, full-load operation time, and operation time at a specific load of the hydro-generating unit are as follows:

[0066] The operation time at a specific load is the operation time when the active power of the unit is greater than P2, where P2 is a set value;

[0067] The method for judging the total operation state of the hydro-generating unit is as follows:

[0068] When the first hydro-generating unit is in the operating state, the second hydro-generating unit is in the operating state,..., and the nth hydro-generating unit is in the operating state are all satisfied simultaneously, then the total operation state of the hydro-generating unit is reached, where n is the number of hydro-generating units;

[0069] When it is determined that the hydro-generating unit is in the total operation state, record the time T5. After that, when any hydro-generating unit changes from the operating state to the hot standby state, record the time T6, and then the total operation time T of the hydro-generating units in this hydropower station can be calculated 机组全部运行时长 = T6 - T5;

[0070] When the total active power of the hydropower station's turbine generator set reaches the rated output, record the time T7; when the total power of the hydropower station's turbine generator set is lower than the rated output, record the time T8. Calculate the full power operation time T of the hydropower station's turbine generator set 机组满发运行时长 =T8-T7;

[0071] When the total active power of the hydropower station's turbine generator sets reaches P2, record the time T9; when the total output of the hydropower station's turbine generator sets is lower than P2, record the time T 10 , we can calculate the operating time T of the turbine generator set of this hydropower station when its output is greater than P2 机组出力大于P运行时长 =T 10 -T9.

[0072] The calculation method for the above-mentioned operation time of the hydro-generator set in the vibration zone is:

[0073] When one of the following conditions is met: the vibration amplitude of the turbine generator set is greater than the set vibration alarm value, the swing amplitude is greater than the set swing alarm value, and the pressure pulsation amplitude is greater than the set pressure pulsation alarm value, and the accumulated time reaches the set time, the turbine generator set operates in the vibration zone;

[0074] When the turbine generator set is judged to be in the vibration zone, record the time T 11 , record the time T when the turbine generator set returns to the operating state in the vibration zone 12 , the operation time T of this turbine generator set in the vibration zone can be calculated 机组振动区运行时长 =T 12 -T 11 .

[0075] Example:

[0076] An automatic statistical method for the specific working condition time of a large-scale hydro-turbine generator set is used to classify and count data such as circuit breakers, disconnectors, grounding switches on the high and low voltage sides of circuit breakers, active power, speed, stator current, stator voltage, water head of the hydro-turbine generator set, and stability indicators such as vibration, swing, and pressure pulsation, and calculate the duration of four working conditions of the hydro-turbine generator set, namely, operation, hot standby, cold standby, and maintenance; the duration of all operation of the hydro-turbine generator set, the full generation time, and the specific load operation time; and the operation time of the hydro-turbine generator set in the vibration zone.

[0077] 1. Statistical method for the operating time, hot standby time, cold standby time and maintenance time of hydro-turbine generator sets.

[0078] Methods for judging the status of hydro-generator sets:

[0079] like Figure 1 As shown in , the method for judging the operating status of a hydro-generator set is:

[0080] When the circuit breaker is closed and the rotational speed > 95% of the rated rotational speed are satisfied simultaneously, the first operating judgment factor is established. When the active power P > the set operating power value P1 and the stator current I1 > the set operating current I0 are satisfied simultaneously, the second operating judgment factor is established;

[0081] When either the first operating judgment factor or the second operating judgment factor is established, the third operating judgment factor is established;

[0082] When the stator voltage U1 > 90% of the rated voltage U n and the terminal voltage U2 > 90% of the rated voltage U n If either one is satisfied, the fourth operating judgment factor is established;

[0083] When the third operating judgment factor and the fourth operating judgment factor are established simultaneously, the hydro-generator set is in the operating state. In this embodiment, the hydro-generator set is the generator set of the Three Gorges Power Plant. The set operating power value P1 is taken as 50 MW, and the set operating current I0 is taken as 1 kA.

[0084] As Figure 2 shown in, the method for judging the hot standby state of the hydro-generator set is:

[0085] When the circuit breaker is opened, the disconnector is closed, the high-voltage earthing switch of the circuit breaker is opened, and the low-voltage earthing switch of the circuit breaker is opened are satisfied simultaneously, the hydro-generator set is in the hot standby state.

[0086] As Figure 3 shown in, the method for judging the cold standby state of the hydro-generator set is:

[0087] When the circuit breaker is opened, the disconnector is opened, the high-voltage earthing switch of the circuit breaker is opened, and the low-voltage earthing switch of the circuit breaker is opened are satisfied simultaneously, the hydro-generator set is in the cold standby state.

[0088] As Figure 4 shown in, the method for judging the maintenance state of the hydro-generator set is:

[0089] When either the high-voltage earthing switch of the circuit breaker is closed or the low-voltage earthing switch of the circuit breaker is closed is satisfied, the hydro-generator set is in the maintenance state.

[0090] After judging that a hydro-generator set is in the operating state, record the time T1. After judging that it is in the hot standby state, record the time T2. After judging that it is in the cold standby state, record the time T3. After judging that it is in the maintenance state, record the time T4.

[0091] T1 < T2, operation transfers to hot standby, T 运行时长 = T2 - T1; T1 > T2, hot standby transfers to operation, T 热备用时长1 = T1 - T2;

[0092] T2 < T3, transfer from hot standby to cold standby, T 热备用时长2 = T3 - T2; T2 > T3, transfer from cold standby to hot standby, T 冷备用时长1 = T2 - T3;

[0093] T3 < T4, transfer from cold standby to maintenance, T 冷备用时长2 = T3 - T4, T3 > T4, transfer from maintenance to cold standby, T 检修时长 = T3 - T4.

[0094] According to the chronological order of timing, the operating duration, hot standby duration, cold standby duration, and maintenance duration of a hydro-generator unit can be calculated, and the monthly and annual durations can be calculated according to requirements.

[0095] 2. Statistical methods for the total operating duration of the unit, the full-load operating duration of the unit, and the operating duration when the active power of the unit is greater than P, where P is a certain output set artificially.

[0096] As Figure 5 shown, the method for judging the total operating state of a hydro-generator unit is:

[0097] When the first hydro-generator unit is in the operating state, the second hydro-generator unit is in the operating state,..., and the nth hydro-generator unit is in the operating state are all satisfied simultaneously, then the total operating state of the hydro-generator unit, where n is the number of hydro-generator units;

[0098] There are n hydro-generator units in the hydropower station. After judging the total operating state of the hydro-generator unit according to Figure 5 record the time T5, and then when any hydro-generator unit transfers from the operating state to the hot standby state, record the time T6, then the total operating duration T of the hydro-generator units in this hydropower station can be calculated 机组全部运行时长 = T6 - T5.

[0099] When the total active power of the hydro-generator units in the hydropower station reaches the rated output, record the time T7, and when the total power of the hydro-generator units in the power station is lower than the rated output, record the time T8, then the full-load operating duration T of the hydro-generator units in this hydropower station can be calculated 机组满发运行时长 = T8 - T7.

[0100] When the total active power of the hydro-generator units in the hydropower station reaches P1, record the time T9, where P1 is a certain active power set artificially, and when the total output of the hydro-generator units in the power station is lower than P1, record the time T 10 , then the operating duration T when the output of the hydro-generator units in this hydropower station is greater than P1 can be calculated 机组出力大于P运行时长 = T 10 - T9.

[0101] 3. Statistical method for the operating duration of the hydro-generator unit in the vibration area.

[0102] When one of the following conditions is met: the vibration amplitude of the turbine generator set is greater than the set vibration alarm value, the swing amplitude is greater than the set swing alarm value, and the pressure pulsation amplitude is greater than the set pressure pulsation alarm value, and the accumulated time reaches the set time, the turbine generator set operates in the vibration zone;

[0103] When it is judged that the turbine generator set is running in the vibration zone, record the time T 11 , record the time T when the turbine generator set returns to the operating state in the vibration zone 12 , the operation time T of this turbine generator set in the vibration zone can be calculated 机组振动区运行时长 =T 12 -T 11 .

Claims

1. An automatic statistical method based on the specific operating time of large hydropower station units, characterized in that: include: The circuit breakers, disconnectors, grounding switch status on the high and low voltage sides of the circuit breakers, active power, speed, stator current and stator voltage data of the hydro-turbine generator sets, as well as the stability index parameters vibration, swing and pressure pulsation are classified and counted, and the duration of the four operating conditions of the hydro-turbine generator sets, namely operation, hot standby, cold standby and maintenance, is calculated; the duration of full operation, full power generation and specific load operation of the hydro-turbine generator sets; and the duration of operation in the vibration zone of the hydro-turbine generator sets.

2. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 1 is characterized in that: The method for judging the operating status of the hydro-generator set is as follows: When the circuit breaker is closed and the speed is greater than 95% of the rated speed, the first judgment factor is established. When the active power P is greater than the set operating power value P1 and the stator current I1 is greater than the set operating current I0, the second judgment factor is established. When one of the first judgment factor and the second judgment factor is satisfied, the third judgment factor is satisfied; When stator voltage U1>90% rated voltage U n The terminal voltage U2>90% rated voltage U n When one of them is satisfied, the fourth judgment factor is established; When the third operation judgment factor and the fourth operation judgment factor are both met, the hydro-generator set is in operation.

3. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 2 is characterized in that: The method for judging the hot standby state of the hydro-generator set is as follows: When the circuit breaker is open, the disconnector is closed, the grounding switch on the high-voltage side of the circuit breaker is open, and the grounding switch on the low-voltage side of the circuit breaker is open at the same time, the turbine generator set is in hot standby state.

4. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 3 is characterized in that: The cold standby state judgment method of the hydro-generator set is as follows: When the circuit breaker is open, the disconnector is open, the grounding switch on the high-voltage side of the circuit breaker is open, and the grounding switch on the low-voltage side of the circuit breaker is open at the same time, the turbine generator set is in cold standby state.

5. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 4 is characterized in that: The method for judging the maintenance status of the hydro-generator set is as follows: When one of the grounding switch on the high-voltage side of the circuit breaker is closed or the grounding switch on the low-voltage side of the circuit breaker is closed, the turbine generator set is in maintenance status.

6. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 5 is characterized in that: The method for calculating the duration of the four operating conditions of the hydro-generator set, namely, operation, hot standby, cold standby and maintenance, is as follows: After judging a hydro-turbine generator set to be in operation state, record the time T1; after judging it to be in hot standby state, record the time T2; after judging it to be in cold standby state, record the time T3; after judging it to be in maintenance state, record the time T4; When T1 < T2, run and switch to hot standby, T 运行时长 = T2 - T1; when T1 > T2, switch from hot standby to run, T 热备用时长1 = T1 - T2; When T2 < T3, the hot standby mode switches to the cold standby mode, and T 热备用时长2 = T3 - T2; when T2 > T3, the cold standby mode switches to the hot standby mode, and T 冷备用时长1 = T2 - T3; When T3 < T4, transfer from cold standby to maintenance, T 冷备用时长2 = T3 - T4, when T3 > T4, transfer from maintenance to cold standby, T 检修时长 = T3 - T4; According to the timing sequence, the operating time, hot standby time, cold standby time and maintenance time of a hydro-turbine generator set can be calculated, and the monthly and annual time can be calculated according to demand.

7. The automatic statistical method based on the specific operating condition time of large hydropower station units according to claim 6 is characterized in that: The calculation method of the total operation time, full generation time and specific load operation time of the hydro-generator set is as follows: The specific load operation time is the operation time when the unit active power is greater than P2, where P2 is the set value; The method for judging the overall operating status of a hydro-generator set is as follows: When the first hydro-turbine generator set is in operation, the second hydro-turbine generator set is in operation, ..., the nth hydro-turbine generator set is in operation at the same time, then all the hydro-turbine generator sets are in operation, and n is the number of hydro-turbine generator sets; When it is determined that the turbine generator set is in full operation, record the time T5. After that, when any turbine generator set switches from operation to hot standby state, record the time T6. The total operation time T of the turbine generator set of this hydropower station can be calculated. 机组全部运行时长 =T6-T5; When the total active power of the hydropower station's turbine generator set reaches the rated output, record the time T7; when the total power of the hydropower station's turbine generator set is lower than the rated output, record the time T8. Calculate the full power operation time T of the hydropower station's turbine generator set 机组满发运行时长 =T8-T7; When the total active power of the hydropower station's turbine generator sets reaches P2, record the time T9; when the total output of the hydropower station's turbine generator sets is lower than P2, record the time T 10 , we can calculate the operating time T of the turbine generator set of this hydropower station when its output is greater than P2 机组出力大于P运行时长 =T 10 -T9.

8. The automatic statistical method based on the specific operating time of large hydropower station units according to claim 7 is characterized in that: The calculation method for the operating time of the hydraulic generator set in the vibration zone is: When one of the following conditions is met: the vibration amplitude of the turbine generator set is greater than the set vibration alarm value, the swing amplitude is greater than the set swing alarm value, and the pressure pulsation amplitude is greater than the set pressure pulsation alarm value, and the accumulated time reaches the set time, the turbine generator set operates in the vibration zone; When the turbine generator set is judged to be in the vibration zone, record the time T 11 , record the time T when the turbine generator set returns to the operating state in the vibration zone 12 , the operation time T of this turbine generator set in the vibration zone can be calculated 机组振动区运行时长 =T 12 -T 11 .

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