Method and device for testing primary frequency modulation of water-turbine generator set

Abstract

The invention provides a primary frequency modulation testing method and device for a water-turbine generator set, and relates to the technical field of water-turbine generator test.The method comprises the steps that a speed regulator comprehensive tester is connected into a plurality of signal generating devices, and the signal generating devices are used for frequency modulation testing of the water-turbine generator set; all devices and subsystems in the water-turbine generator set are checked, and it is determined that experiment conditions are met; enabling the water-turbine generator set to operate in an automatic control mode, setting primary frequency modulation parameters according to the requirements of a test scheme, adjusting the signal generation device, starting a primary frequency modulation function, and carrying out a primary frequency modulation response test, a primary frequency modulation dead zone test and a secondary frequency modulation response test. By testing the water-turbine generator set, the primary frequency modulation and secondary frequency modulation functions of the generator are verified, and the operation stability of the water-turbine generator set is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydro-generator testing, and in particular to a primary frequency modulation testing method and device for a hydro-generator set. Background Art

[0002] Hydropower is an environmentally friendly, reusable green energy. With the continuous increase in the capacity of hydropower generators, their safety and economy are becoming increasingly important. The turbine generator set is the most critical main equipment of a hydropower station. Once an accident occurs in a hydropower generator set, it will affect the normal operation of the unit at the least, or damage the unit equipment at the worst, and even affect the safety and stability of the power grid. Therefore, it is of great significance to monitor the status of the turbine generator set to ensure the safe, reliable and stable operation of the hydropower generator set and maximize the power generation efficiency.

[0003] At present, the test items of the frequency regulation test process of the hydro-turbine generator set are relatively simple, and it is difficult to comprehensively test the frequency regulation performance of the hydro-turbine generator set, which reduces the stability of the operation of the hydro-turbine generator set. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, the first purpose of the present application is to propose a primary frequency regulation test method for a hydro-turbine generator set.

[0006] The second object of the present application is to provide a device.

[0007] The third objective of the present application is to provide an electronic device.

[0008] A fourth objective of the present application is to provide a computer-readable storage medium.

[0009] A fifth object of the present application is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for testing primary frequency regulation of a hydro-generator set, comprising:

[0011] Connecting the speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set;

[0012] Check each device and subsystem in the hydro-generator set to ensure that the experimental conditions are met;

[0013] The hydro-generator set is operated in an automatic control mode, a primary frequency modulation parameter is set according to the test plan, the signal generating device is adjusted, a primary frequency modulation function is started and a primary frequency modulation response test is performed;

[0014] The hydro-generator set is operated in an automatic control mode, the primary frequency modulation parameters are adjusted according to the test plan, the signal generating device is adjusted, the primary frequency modulation function is turned on and a primary frequency modulation dead zone test of the speed regulator is performed;

[0015] The hydro-generator set is operated in automatic control mode, the primary frequency modulation parameters are adjusted according to the test plan requirements, the signal generating device is adjusted, the primary frequency modulation function is exited and a secondary frequency modulation response test is performed.

[0016] Optionally, the speed regulator comprehensive tester is connected to multiple signal generating devices, including:

[0017] Connecting the speed regulator comprehensive tester to a power sensor device, wherein the power sensor device is used to generate a feedback signal according to the power of the power transmitter;

[0018] The speed governor comprehensive tester is connected to a guide vane opening signal generating device, wherein the guide vane opening signal generating device is used to generate a feedback signal according to the guide vane displacement;

[0019] The speed governor comprehensive tester is connected to a blade opening signal generating device, wherein the blade opening signal generating device is used to generate a feedback signal according to the blade displacement;

[0020] The speed regulator comprehensive tester is connected to the motor frequency detection device, and the motor frequency detection device includes a speed regulator release electrical cabinet and a relay protection tester frequency generating device, wherein the speed regulator release electrical cabinet is connected to the speed regulator comprehensive tester through a first air switch to generate an original machine frequency voltage transformer signal; the relay protection tester frequency generating device is connected to the speed regulator comprehensive tester through a second air switch.

[0021] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting a primary frequency modulation parameter according to the test plan, adjusting the signal generating device, starting a primary frequency modulation function and performing a primary frequency modulation response test includes:

[0022] Exit the unit active power regulation function of the monitoring system;

[0023] Backup speed regulator electrical cabinet primary frequency modulation parameters;

[0024] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0025] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0026] Adjust the current speed governor control mode to opening control;

[0027] Adjusting the load of the hydro-generator set, and recording the guide vane opening corresponding to each load point at each test point;

[0028] Perform a step response test.

[0029] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing a primary frequency modulation dead zone test of the speed regulator includes:

[0030] Exit the unit active power regulation function of the monitoring system;

[0031] Backup speed regulator electrical cabinet primary frequency modulation parameters;

[0032] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0033] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0034] A variety of control signals are injected into the hydro-generator set, and first experimental data of the hydro-generator set is collected, and corresponding measures are implemented according to the first experimental data.

[0035] Optionally, the implementing corresponding measures according to the first experimental data includes at least one of the following:

[0036] If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch is prohibited from closing or opening at the same time as the second air switch;

[0037] If the relay protection tester fails, resulting in a frequency output failure, check that the frequency-related test wiring is firm, use a multimeter to measure the frequency output interface frequency value to verify that it is normal, adjust the signal generating device to the machine frequency sampling state where the first air switch is closed and the second air switch is open, use the actual frequency of the unit, monitor whether the unit frequency is stable, and switch the governor control mode to manual;

[0038] If the hydro-generator set is operating at full load, the upper limit of the input step frequency is determined under the EDC required parameters and the frequency of the step signal is adjusted to be lower than the upper limit of the step frequency.

[0039] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, exiting the primary frequency modulation function and performing a secondary frequency modulation response test includes:

[0040] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0041] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0042] The unit load of the hydro-generator set is adjusted to maintain a preset operation time under each load, and second experimental data is obtained, and corresponding measures are implemented according to the second experimental data.

[0043] Optionally, the implementing corresponding measures according to the second experimental data includes at least one of the following:

[0044] If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch is prohibited from closing or opening at the same time as the second air switch;

[0045] If the monitoring system cannot increase or decrease power, suspend the test, monitor the load of the turbine generator set, check the monitoring active power increase / decrease relay and wiring conditions, switch the main controller of the speed regulator to the standby machine, and check the increase or decrease of power;

[0046] If power or frequency oscillation occurs, suspend the test, adjust and control the active power of the turbine generator set, increase the excitation voltage of all units to the upper limit, increase the reactive output of the entire plant, and prevent line overvoltage. Check whether the voltage and frequency of the line, main equipment, and plant power are normal, and whether there is any frequency abnormality that may cause soft start failure of important water pumps / oil pumps.

[0047] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a primary frequency regulation test device for a hydro-generator set, comprising:

[0048] A connection module, used to connect the speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set;

[0049] The preparation module is used to check each device and subsystem in the hydro-generator set to determine whether the experimental conditions are met;

[0050] The first test module is used to operate the hydro-generator set in an automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform a primary frequency modulation response test;

[0051] The second test module is used to operate the hydro-generator set in an automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform a primary frequency modulation dead zone test of the governor;

[0052] The third test module is used to operate the hydro-generator set under automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, exit the primary frequency modulation function and perform a secondary frequency modulation response test.

[0053] To achieve the above-mentioned purpose, the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0054] The memory stores computer-executable instructions;

[0055] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0056] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a computer-readable storage medium, in which computer-readable storage medium is stored computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the method as described in any one of the first aspects.

[0057] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, which implements any method in the first aspect when executed by a processor.

[0058] The primary frequency regulation test method, device, electronic device and storage medium of the hydro-turbine generator set provided in the present application verify the primary frequency regulation and secondary frequency regulation functions of the generator by testing the hydro-turbine generator set, thereby improving the stability of the operation of the hydro-turbine generator set.

[0059] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0061] Figure 1 A schematic flow chart of a primary frequency regulation test method for a hydro-generator set provided in an embodiment of the present application;

[0062] Figure 2 A schematic structural diagram of a primary frequency regulation test device for a hydro-generator set provided in an embodiment of the present application;

[0063] Figure 3 A schematic diagram of a primary frequency modulation response test injection signal provided in an embodiment of the present application;

[0064] Figure 4A schematic diagram of a primary frequency modulation response test injection signal provided in an embodiment of the present application;

[0065] Figure 5 A schematic diagram of a primary frequency modulation response test injection signal provided in an embodiment of the present application;

[0066] Figure 6 A schematic diagram of a primary frequency modulation response test injection signal provided in an embodiment of the present application;

[0067] Figure 7 A schematic diagram of an injection signal provided in an embodiment of the present application;

[0068] Figure 8 A schematic diagram of an injection signal provided in an embodiment of the present application;

[0069] Fig. 9 A schematic structural diagram of a primary frequency regulation test device for a hydro-generator set provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0071] In view of the problems in the related art, the embodiment of the present application provides a method for testing the primary frequency regulation of a hydro-generator set. Figure 1 A flow chart of a method for testing the primary frequency regulation of a hydro-generator set provided in an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0072] Step 101, connecting a speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set;

[0073] Step 102, inspecting each device and subsystem in the hydro-generator set to determine whether the experimental conditions are met;

[0074] Step 103, operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing a primary frequency modulation response test;

[0075] Step 104, operating the hydro-generator set in automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing a primary frequency modulation dead zone test of the speed regulator;

[0076] Step 105, operating the hydro-generator set in automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, exiting the primary frequency modulation function and performing a secondary frequency modulation response test.

[0077] Optionally, the speed regulator comprehensive tester is connected to multiple signal generating devices, including:

[0078] Connecting the speed regulator comprehensive tester to a power sensor device, wherein the power sensor device is used to generate a feedback signal according to the power of the power transmitter;

[0079] The speed governor comprehensive tester is connected to a guide vane opening signal generating device, wherein the guide vane opening signal generating device is used to generate a feedback signal according to the guide vane displacement;

[0080] The speed governor comprehensive tester is connected to a blade opening signal generating device, wherein the blade opening signal generating device is used to generate a feedback signal according to the blade displacement;

[0081] The speed regulator comprehensive tester is connected to a motor frequency detection device, and the motor frequency detection device includes a speed regulator release electrical cabinet and a relay protection tester frequency generating device, wherein the speed regulator release electrical cabinet is connected to the speed regulator comprehensive tester through a first air switch (QL1) to generate an original machine frequency voltage transformer signal; and the relay protection tester frequency generating device is connected to the speed regulator comprehensive tester through a second air switch (QL2).

[0082] Figure 2 A schematic diagram of the structure of a primary frequency regulation test device for a hydro-generator set provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the required experimental instruments include: (1) Power plant instruments: relay protection tester Only, speed regulator comprehensive tester GTS-TG-A.

[0083] (2) EDC and GE instruments: WaveBook / 516E, Sentran current sensor (CT), Ohiosemitronics DC voltage sensor, Fluke i310 s AC / DC current probe, AEMC MR 520 AC / DC current probe. EDC (Economic Dispatch Control) is a real-time load distribution control model between plants with the plant as the main control object. It distributes the load between plants in real time through strategic control and realizes the joint optimization dispatch of cascade power plants.

[0084] The power plant speed governor comprehensive tester is connected to three analog signals (power signal, guide vane opening, blade opening) and one frequency signal (frequency generated by the relay protection tester or the actual machine frequency PT). The types and wiring methods of each signal are shown in Table 1:

[0085]

[0086] Table 1 The signal access signals of EDC and GE instruments are shown in Table 2, which shall be subject to on-site consultation and confirmation by the other party's personnel.

[0087]

[0088]

[0089] Table 2

[0090] During the test, it is strictly forbidden to close or open the temporary circuit breakers QL1 and QL2 at the same time. The circuit breaker is fixed on the table of the test platform trolley. When operating, it should be opened first and then closed, and the operation should be quick.

[0091] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting a primary frequency modulation parameter according to the test plan, adjusting the signal generating device, starting a primary frequency modulation function and performing a primary frequency modulation response test includes:

[0092] Exit the unit active power regulation function of the monitoring system;

[0093] Backup speed regulator electrical cabinet primary frequency modulation parameters;

[0094] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0095] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0096] Adjust the current speed governor control mode to opening control;

[0097] Adjusting the load of the hydro-generator set, and recording the guide vane opening corresponding to each load point at each test point;

[0098] Perform a step response test.

[0099] In a possible embodiment, during the primary frequency regulation response test, the test conditions are as follows: the unit is connected to the grid. Each system of the unit is in automatic control mode. The primary frequency regulation parameters are set according to the requirements of the EDC test plan. The temporary circuit breaker is in the machine frequency mode of QL1 closed and QL2 opened. The unit active power regulation of the monitoring system is exited. The primary frequency regulation function is enabled.

[0100] The experimental process is:

[0101] (1) Backup speed controller electrical cabinet primary frequency modulation parameters, check Bp as required to be 4%, change frequency dead zone Δf to 0.025Hz. (According to frequency dead zone Δf, gradually adjust by 0.2Hz, 0.1Hz and do the test. The load condition point is adjusted to 25MW, see (5) for details)

[0102] (2) Check that the frequency regulation limit of the speed regulator electrical cabinet is 100%, the network switching network is in manual monitoring mode, and the monitoring primary frequency regulation function input signal is on.

[0103] (3) Adjust the temporary circuit breaker status to the frequency transmission mode of QL1 open and QL2 closed.

[0104] (4) Check whether the current speed regulator control mode is in opening control.

[0105] (5) Adjust the load of the test unit. EDC and GE require the load of the test unit to be the current maximum head output (MCR) (50MW) and 90% MCR (45MW). After calculation, the test is carried out by inputting a frequency step disturbance at the load point required by EDC. 50MW and 45MW are disturbed by -0.075Hz and -0.131Hz respectively at bp=4 and Δf=0.025Hz, which will cause the unit load to exceed the set 105% load point, which is not conducive to the safety of the unit and the test. It is adjusted to 25MW for the test.

[0106] The load of the test unit is adjusted by remote operation in the central control room. The guide vane opening corresponding to each load point is recorded at each test point. Under the above load, the step response test is carried out according to Table 3. The step signal method requirements are as follows Figure 3 , 4 , 5, and 6, Figure 3 , 4 , 5, and 6 are schematic diagrams of a primary frequency modulation response test injection signal provided in an embodiment of the present application.

[0107]

[0108]

[0109] Table 3

[0110] For items 13 and 14 in Table 3, the power plant test equipment does not have the Ta and Tb setting functions. In this test, the generator output will be significantly reduced, and the real-time operating conditions of the power grid should be considered and the decision on whether to conduct the test should be made based on the actual risk assessment.

[0111] The risk points and corresponding treatment methods of a frequency modulation response test are as follows:

[0112] (1) Risk point: The relay protection tester is damaged, and the frequency signal is mistakenly sent to other key control systems. Preventive measures: It is forbidden to close or open the temporary circuit breakers QL1 and QL2 at the same time. The circuit breaker is fixed on the table of the test platform trolley. When operating, it should be opened first and then closed, and the operation should be quick.

[0113] (2) Risk point: The monitoring system cannot increase or decrease power. Preventive measures: Suspend the test, monitor whether the unit is overloaded, check whether the monitoring active power increase / decrease relay is normal, whether the wiring is firm, switch the speed regulator main controller to machine B, and check whether the increase or decrease of power is normal. If necessary, switch the speed regulator control mode to manual, and manually operate on site to maintain load stability.

[0114] (3) Risk point: Failure of the relay protection tester leads to frequency output failure. Preventive measures: Check that the frequency-related test wiring is firm, use a multimeter to measure the frequency value of the frequency output interface to check that it is normal, and the test circuit breaker should work reliably. Adjust the temporary circuit breaker QL1 / QL2 state to the machine frequency sampling state of QL1 closed and QL2 open, use the actual frequency of the unit, and monitor whether the unit frequency is stable. Switch the speed regulator control mode to manual. If it cannot be stabilized, switch the main control authority to the main PCC B unit.

[0115] (4) Risk point: power / frequency oscillation. Preventive measures: suspend the test and handle according to the 230kV system synchronous oscillation emergency disposal card.

[0116] (5) Risk point: The test unit frequency is out of control. Preventive measures: Pause the test, adjust the frequency output value to 50Hz, and observe whether the test unit frequency is stable. According to the actual situation, take measures such as switching the main controller to PCC B and switching the speed governor control mode to manual.

[0117] (6) Risk point: overload. Preventive control measures: Closely monitor the operating conditions of the test unit and control it according to 105% MCR or 105% Pe. When the unit is operating at full load, under the EDC's required parameters of bp = 4%, Δf = 0.025Hz, the input step frequency should not exceed -0.075Hz. When the unit load is 90% MCR or 90% Pe, the input step frequency should not exceed -0.131Hz. When the test condition may cause overload operation, and the step frequency disturbance is small at this time, the governor action effect is not obvious, and the commander-in-chief should be reported to negotiate with EDC and GE test personnel.

[0118] (7) Risk point: Frequent operation of the oil pump leads to accidental low oil pressure. Preventive control measures: The operator monitors the operating conditions of the oil pump, the oil pressure level of the pressure oil tank, and the oil pump of the speed regulator oil pressure device is operating normally. When the oil pressure is unstable, notify the test commander and temporarily suspend the test operation. On-site test personnel strengthen the monitoring of the equipment. When the oil pressure drops and cannot be controlled, handle it according to the emergency disposal card.

[0119] (8) Risk point: Frequent adjustment may lead to loss of control of hydraulic equipment. Preventive measures: Arrange special personnel to monitor the swing amplitude of the weight, oil leakage of the guide vane servo, and the working condition of the blade servo. If any abnormality occurs, notify the test commander to temporarily suspend the test.

[0120] (9) Risk point: Unit phase adjustment operation. Preventive control measures: Cooperate with the test personnel to consult with EDC and GE test personnel. When sending large frequency difference disturbance to the speed control system, the minimum safe no-load opening under the current water head should be calculated in advance. After confirmation by both parties and approval by the general commander, the operation can be carried out.

[0121] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing a primary frequency modulation dead zone test of the speed regulator includes:

[0122] Exit the unit active power regulation function of the monitoring system;

[0123] Backup speed regulator electrical cabinet primary frequency modulation parameters;

[0124] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0125] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0126] A variety of control signals are injected into the hydro-generator set, and first experimental data of the hydro-generator set is collected, and corresponding measures are implemented according to the first experimental data.

[0127] In a possible embodiment, a frequency modulation dead zone test process is as follows:

[0128] Test conditions

[0129] The unit is operated with a load of 45MW. Or the unit load is adjusted according to 90% MCR based on the water head. The unit is allowed to stabilize for at least 30 minutes.

[0130] The primary frequency modulation parameters are adjusted according to the requirements of the EDC test plan.

[0131] The temporary circuit breaker is in the machine frequency mode of QL1 closed and QL2 opened.

[0132] All systems of the unit are operating in automatic control mode.

[0133] The active power regulation of the unit in the monitoring system is exited.

[0134] The frequency modulation function is put into use once.

[0135] Main test contents:

[0136] (1) Check the primary frequency modulation parameters of the backup speed regulator electrical cabinet as required. Check that Bp is 4% and change the frequency dead zone Δf to 0.025Hz. (Test according to the frequency dead zone Δf at 0.1Hz. At the load condition point of 25MW.)

[0137] (2) Check that the frequency regulation limit of the speed regulator electrical cabinet is 100%, the network switching network is in manual monitoring mode, and the monitoring primary frequency regulation function input signal is on.

[0138] (3) Adjust the temporary circuit breaker status to the frequency transmission mode of QL1 open and QL2 closed.

[0139] (4) Test according to Table 4, the signal injection form is as follows Figure 3 , 4 , 7, and 8, Figure 7 , 8 The following are schematic diagrams of an injection signal provided in the embodiments of the present application. Some test operating points should be controlled according to the overload content.

[0140]

[0141] Table 4

[0142] Optionally, the implementing corresponding measures according to the first experimental data includes at least one of the following:

[0143] If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch is prohibited from closing or opening at the same time as the second air switch;

[0144] If the relay protection tester fails, resulting in a frequency output failure, check that the frequency-related test wiring is firm, use a multimeter to measure the frequency output interface frequency value to verify that it is normal, adjust the signal generating device to the machine frequency sampling state where the first air switch is closed and the second air switch is open, use the actual frequency of the unit, monitor whether the unit frequency is stable, and switch the governor control mode to manual;

[0145] If the hydro-generator set is operating at full load, the upper limit of the input step frequency is determined under the EDC required parameters and the frequency of the step signal is adjusted to be lower than the upper limit of the step frequency.

[0146] In this embodiment, the risk points and treatment methods in the speed regulator primary frequency regulation dead zone test are as follows:

[0147] (1) Risk point: The relay protection tester is damaged, and the frequency signal is mistakenly sent to other key control systems. Preventive measures: It is forbidden to close or open the temporary circuit breakers QL1 and QL2 at the same time. The circuit breaker is fixed on the table of the test platform trolley. When operating, it should be opened first and then closed, and the operation should be quick.

[0148] (2) Risk point: The monitoring system cannot increase or decrease power. Preventive measures: Suspend the test, monitor whether the unit is overloaded, check whether the monitoring active power increase / decrease relay is normal, whether the wiring is firm, switch the speed regulator main controller to machine B, and check whether the increase or decrease of power is normal. If necessary, switch the speed regulator control mode to manual, and manually operate on site to maintain load stability.

[0149] (3) Risk point: Failure of the relay protection tester leads to frequency output failure. Preventive measures: Check that the frequency-related test wiring is firm, use a multimeter to measure the frequency value of the frequency output interface to check that it is normal, and the test circuit breaker should work reliably. Adjust the temporary circuit breaker QL1 / QL2 state to the machine frequency sampling state of QL1 closed and QL2 open, use the actual frequency of the unit, and monitor whether the unit frequency is stable. Switch the speed regulator control mode to manual. If it cannot be stabilized, switch the main control authority to the main PCC B unit.

[0150] (4) Risk point: power / frequency oscillation. Preventive measures: suspend the test and handle according to the emergency disposal card.

[0151] (5) Risk point: The test unit frequency is out of control. Preventive measures: Pause the test, adjust the frequency output value to 50Hz, and observe whether the test unit frequency is stable. According to the actual situation, take measures such as switching the main controller to PCC B and switching the speed governor control mode to manual.

[0152] (6) Risk point: overload. Preventive control measures: Closely monitor the operating conditions of the test unit and control it according to 105% MCR or 105% Pe. When the unit is operating at full load, under the EDC's required parameters of bp = 4%, Δf = 0.025Hz, the input step frequency should not exceed -0.075Hz. When the unit load is 90% MCR or 90% Pe, the input step frequency should not exceed -0.131Hz. When the test condition may cause overload operation, and the step frequency disturbance is small at this time, the governor action effect is not obvious, and the commander-in-chief should be reported to negotiate with EDC and GE test personnel.

[0153] (7) Risk point: Frequent operation of the oil pump. Preventive control measures: The operator monitors the operating conditions of the oil pump, the oil pressure level of the pressure oil tank, and the oil pump of the speed regulator oil pressure device is operating normally. When the oil pressure is unstable, notify the test commander and temporarily suspend the test operation. On-site test personnel strengthen the monitoring of the equipment. When the oil pressure drops and cannot be controlled, handle it according to the emergency disposal card.

[0154] (8) Risk point: Frequent adjustment may lead to loss of control of hydraulic equipment. Preventive measures: Arrange special personnel to monitor the swing amplitude of the weight, oil leakage of the guide vane servo, and the working condition of the blade servo. If any abnormality occurs, notify the test commander to temporarily suspend the test.

[0155] Optionally, the step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, exiting the primary frequency modulation function and performing a secondary frequency modulation response test includes:

[0156] Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode;

[0157] Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened;

[0158] The unit load of the hydro-generator set is adjusted to maintain a preset operation time under each load, and second experimental data is obtained, and corresponding measures are implemented according to the second experimental data.

[0159] In this embodiment, the experimental conditions for the secondary frequency regulation response test are: the unit is connected to the grid and operated with load. The primary frequency regulation parameters are set according to the requirements of the EDC test plan. The temporary circuit breaker is in the machine frequency mode of QL1 closed and QL2 open. The various systems of the unit are operated in automatic control mode. The unit active power regulation of the monitoring system is put into operation. The primary frequency regulation function is exited.

[0160] The main test contents are

[0161] (1) Check that the frequency regulation limit of the speed regulator electrical cabinet is 100%, the network switching network is in manual monitoring mode, and the monitoring primary frequency regulation function exit signal is on.

[0162] (2) Remote operation in the central control room, adjust the unit load according to the table below. Each load point runs stably for 5 minutes. When the minimum MW rating is greater than 10% of the MCR, the test should be started / stopped according to the minimum MW rating.

[0163] The test points are shown in Table 5.

[0164] Test point number P(MW),% Test point number P(MW),% 1 10 11 90 2 20 12 80 3 30 13 70 4 40 14 60 5 50 15 50 6 60 16 40 7 70 17 30 8 80 18 20 9 90 19 103 10 100

[0165] Table 5

[0166] Optionally, the implementing corresponding measures according to the second experimental data includes at least one of the following:

[0167] If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch is prohibited from closing or opening at the same time as the second air switch;

[0168] If the monitoring system cannot increase or decrease power, suspend the test, monitor the load of the turbine generator set, check the monitoring active power increase / decrease relay and wiring conditions, switch the main controller of the speed regulator to the standby machine, and check the increase or decrease of power;

[0169] If power or frequency oscillation occurs, suspend the test, adjust and control the active power of the turbine generator set, increase the excitation voltage of all units to the upper limit, increase the reactive output of the entire plant, and prevent line overvoltage. Check whether the voltage and frequency of the line, main equipment, and plant power are normal, and whether there is any frequency abnormality that may cause soft start failure of important water pumps / oil pumps.

[0170] In this embodiment, the risk points and treatment methods of the secondary frequency modulation response test are as follows:

[0171] (1) Risk point: The relay protection tester is damaged, and the frequency signal is mistakenly sent to other key control systems. Preventive measures: It is forbidden to close or open the temporary circuit breakers QL1 and QL2 at the same time. The circuit breaker is fixed on the table of the test platform trolley. When operating, it should be opened first and then closed, and the operation should be quick.

[0172] (2) Risk point: The monitoring system cannot increase or decrease power. Preventive measures: Suspend the test, monitor whether the unit is overloaded, check whether the monitoring active power increase / decrease relay is normal, whether the wiring is firm, switch the speed regulator main controller to machine B, and check whether the increase or decrease of power is normal. If necessary, switch the speed regulator control mode to manual, and manually operate on site to maintain load stability.

[0173] (3) Risk point: power / frequency oscillation. Preventive measures: suspend the test, and the operation staff on duty in the central control room immediately start the active power regulation control of the test unit, increase the excitation voltage of all units to the upper limit, and increase the reactive power output of the entire plant. Prevent overvoltage in the line, observe whether the line power curve has a divergent and increasing trend, and whether there is a situation where the units in the plant grab the load. All operation staff on duty and test personnel should closely monitor the on-site equipment and check whether the oscillation center is the test unit. If necessary, switch the speed regulator control mode to manual or de-energize the shutdown. Check whether the voltage and frequency of the line, main equipment, and plant power are normal, and whether there is a frequency abnormality that causes the soft start failure of important water pumps / oil pumps.

[0174] (4) Risk point: The frequency of the test unit is out of control. Preventive measures: Suspend the test, adjust the frequency output value to 50Hz, and observe whether the frequency of the test unit is stable. According to the actual situation, take measures such as switching the main controller to PCC B and switching the speed governor control mode to manual.

[0175] (5) Risk point: overload. Preventive control measures: closely monitor the operating conditions of the test unit and control it according to 105% MCR or 105% Pe.

[0176] (6) Risk point: Frequent operation of the oil pump. Preventive control measures: The operator monitors the operating conditions of the oil pump, the oil pressure of the pressure oil tank, and the oil pump of the speed regulator oil pressure device to ensure normal operation. When the oil pressure is unstable, notify the test commander and temporarily suspend the test operation. On-site test personnel should strengthen monitoring of the equipment.

[0177] In order to implement the above-mentioned embodiment, the present application also proposes a primary frequency regulation test device for a hydro-generator set. Fig. 9 This is a schematic diagram of the structure of a primary frequency regulation test device for a hydro-generator set provided in an embodiment of the present application. Fig. 9 As shown, the device comprises:

[0178] A connection module 910 is used to connect the speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set;

[0179] Preparation module 920, used to check each device and subsystem in the hydro-generator set to determine whether the experimental conditions are met;

[0180] The first test module 930 is used to operate the hydro-generator set in an automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform a primary frequency modulation response test;

[0181] The second test module 940 is used to operate the hydro-generator set in the automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform the primary frequency modulation dead zone test of the speed regulator;

[0182] The third test module 950 is used to operate the hydro-generator set under automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, exit the primary frequency modulation function and perform a secondary frequency modulation response test.

[0183] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0184] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0185] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0186] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0187] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0188] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0189] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0190] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0191] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0192] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0193] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0194] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0195] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0196] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for testing primary frequency regulation of a hydro-generator set, characterized in that: The following steps are involved: Connecting the speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set; Check each device and subsystem in the hydro-generator set to ensure that the experimental conditions are met; The hydro-generator set is operated in an automatic control mode, a primary frequency modulation parameter is set according to the test plan, the signal generating device is adjusted, a primary frequency modulation function is started and a primary frequency modulation response test is performed; The hydro-generator set is operated in an automatic control mode, the primary frequency modulation parameters are adjusted according to the test plan, the signal generating device is adjusted, the primary frequency modulation function is turned on and a primary frequency modulation dead zone test of the speed regulator is performed; The hydro-generator set is operated in automatic control mode, the primary frequency modulation parameters are adjusted according to the test plan requirements, the signal generating device is adjusted, the primary frequency modulation function is exited and a secondary frequency modulation response test is performed.

2. The method according to claim 1, characterized in that The speed regulator comprehensive tester is connected to multiple signal generating devices, including: Connecting the speed regulator comprehensive tester to a power sensor device, wherein the power sensor device is used to generate a feedback signal according to the power of the power transmitter; The speed governor comprehensive tester is connected to a guide vane opening signal generating device, wherein the guide vane opening signal generating device is used to generate a feedback signal according to the guide vane displacement; The speed governor comprehensive tester is connected to a blade opening signal generating device, wherein the blade opening signal generating device is used to generate a feedback signal according to the blade displacement; The speed regulator comprehensive tester is connected to the motor frequency detection device, and the motor frequency detection device includes a speed regulator release electrical cabinet and a relay protection tester frequency generating device, wherein the speed regulator release electrical cabinet is connected to the speed regulator comprehensive tester through a first air switch to generate an original machine frequency voltage transformer signal; the relay protection tester frequency generating device is connected to the speed regulator comprehensive tester through a second air switch.

3. The method according to claim 2, characterized in that The step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing a primary frequency modulation response test includes: Exit the unit active power regulation function of the monitoring system; Backup speed regulator electrical cabinet primary frequency modulation parameters; Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode; Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened; Adjust the current speed governor control mode to opening control; Adjusting the load of the hydro-generator set, and recording the guide vane opening corresponding to each load point at each test point; Perform a step response test.

4. The method according to claim 2, characterized in that: The step of operating the hydro-generator set in the automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, starting the primary frequency modulation function and performing the primary frequency modulation dead zone test of the speed regulator includes: Exit the unit active power regulation function of the monitoring system; Backup speed regulator electrical cabinet primary frequency modulation parameters; Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode; Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened; A variety of control signals are injected into the hydro-generator set, and first experimental data of the hydro-generator set is collected, and corresponding measures are implemented according to the first experimental data.

5. The method according to claim 4, characterized in that The implementing corresponding measures according to the first experimental data includes at least one of the following: If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch and the second air switch are prohibited from being closed or opened at the same time; If the relay protection tester fails, resulting in a frequency output failure, check that the frequency-related test wiring is firm, use a multimeter to measure the frequency output interface frequency value to verify that it is normal, adjust the signal generating device to the machine frequency sampling state where the first air switch is closed and the second air switch is open, use the actual frequency of the unit, monitor whether the unit frequency is stable, and switch the governor control mode to manual; If the hydro-generator set is operating at full load, the upper limit of the input step frequency is determined under the required parameters of the economic dispatch control (EDC), and the frequency of the step signal is adjusted to be lower than the upper limit of the step frequency.

6. The method according to claim 2, characterized in that The step of operating the hydro-generator set in an automatic control mode, adjusting the primary frequency modulation parameters according to the test plan, adjusting the signal generating device, exiting the primary frequency modulation function and performing a secondary frequency modulation response test includes: Check the frequency limiting of the speed regulator electrical cabinet, and switch the network to manual monitoring mode; Adjusting the state of the signal generating device to a frequency generating mode in which the first air switch is closed and the second air switch is opened; The unit load of the hydro-generator set is adjusted to maintain a preset operation time under each load, and second experimental data is obtained, and corresponding measures are implemented according to the second experimental data.

7. The method according to claim 6, characterized in that The implementing corresponding measures according to the second experimental data includes at least one of the following: If the relay protection tester is damaged and the frequency signal is mistakenly transmitted to other key control systems, the first air switch and the second air switch are prohibited from being closed or opened at the same time; If the monitoring system cannot increase or decrease power, suspend the test, monitor the load of the turbine generator set, check the monitoring active power increase / decrease relay and wiring conditions, switch the main controller of the speed regulator to the standby machine, and check the increase or decrease of power; If power or frequency oscillation occurs, suspend the test, adjust and control the active power of the turbine generator set, increase the excitation voltage of all units to the upper limit, increase the reactive output of the entire plant, and prevent line overvoltage. Check whether the voltage and frequency of the line, main equipment, and plant power are normal, and whether there is any frequency abnormality that may cause soft start failure of important water pumps / oil pumps.

8. A primary frequency regulation test device for a hydro-generator set, characterized in that: include: A connection module, used to connect the speed governor comprehensive tester to a plurality of signal generating devices, wherein the signal generating devices are used for frequency regulation testing of a hydro-generator set; The preparation module is used to check each device and subsystem in the hydro-generator set to determine whether the experimental conditions are met; The first test module is used to operate the hydro-generator set in an automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform a primary frequency modulation response test; The second test module is used to operate the hydro-generator set in an automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, start the primary frequency modulation function and perform a primary frequency modulation dead zone test of the governor; The third test module is used to operate the hydro-generator set under automatic control mode, adjust the primary frequency modulation parameters according to the test plan requirements, adjust the signal generating device, exit the primary frequency modulation function and perform a secondary frequency modulation response test.

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