CN109581174B - Nuclear power station dynamic simulation test system and test method - Google Patents
Nuclear power station dynamic simulation test system and test method Download PDFInfo
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- CN109581174B CN109581174B CN201811454756.8A CN201811454756A CN109581174B CN 109581174 B CN109581174 B CN 109581174B CN 201811454756 A CN201811454756 A CN 201811454756A CN 109581174 B CN109581174 B CN 109581174B
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Abstract
The invention provides a dynamic simulation test system and a test method for a nuclear power station, which are used for a monitoring device of a rotating diode of an exciter of the nuclear power station, and the system comprises: the signal generator is used for simulating a working condition signal induced by the sensor under the dynamic condition of the exciter; the monitoring module is used for processing and judging the working condition signals sensed by the sensor and outputting a judgment result; and the test module is used for receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, verifying the correctness of the judgment result output by the monitoring module and realizing the dynamic simulation test under a static state. According to the invention, the dynamic simulation experiment is carried out on the rotating diode monitoring device under the static condition, the logic correctness of the rotating diode monitoring device is checked, the problem of dynamic signal logic can be found out in advance and solved in advance, and the unit main line construction period is greatly saved; meanwhile, the method has great reference value for device maintenance and troubleshooting, and great construction period is strived for a key path for unit later-stage starting.
Description
Technical Field
The invention relates to the field of debugging of excitation systems of large generators, in particular to a nuclear power station dynamic simulation test system and a test method for simulating a nuclear power station exciter rotating diode monitoring device.
Background
The brushless excitation system uses the voltage regulator to excite the excitation winding of the AC exciter, the armature winding of the exciter generates AC which is rectified by the rotating rectifier and then is excited by the field winding of the main generator, and the brushless excitation system has wide application in large-scale generator sets due to high reliability. The rectifier diode in the exciter rotates at high speed along with the generator, a loop is not easy to be monitored in real time, and corresponding treatment cannot be carried out immediately if the diode fails. In the existing brushless excitation system, a rotating diode monitoring device (DNC for short) is the only device which can monitor in real time at present and send out an alarm or trip under abnormal conditions, and has very important significance for the safe and stable operation of a generator. The rotating diode monitoring device judges whether the phase is broken or not by judging whether the peak voltage signal exists or not. For debugging of the rotating diode monitoring device, the prior art is conventional static debugging and dynamic debugging. The static debugging is to check the appearance and an electric loop when the unit is not started and to check the signal fundamentally; the dynamic debugging is that after the unit is started, the signal measurement, the fixed value setting, the actual trip transmission and the like are respectively carried out when the exciter is not open-phase, the exciter is actually open-phase and the generator is open-phase when the generator is in no-load.
In the prior art, problems which can be found in a static debugging process are very limited, important technical parameters such as lockout logic, trip logic and the like cannot be simulated in a static state, and reference opinions cannot be given to dynamic test logic; in a dynamic situation, the generator is switched between states such as no-phase interruption, one-phase interruption, two-phase interruption and the like when no load exists, the exciter needs to be accessed for dismounting, risks such as potential foreign matters and the like are high, and if important sampling processing loops and trip logic cannot be verified in a static state, dynamic test logic and later-stage problem analysis may be affected. Particularly, in the debugging of a large-scale unit, the parameters of an exciter are correspondingly updated, a DNC monitoring device for monitoring a rotating diode of the exciter is also updated, a reference power station is not provided, and if the problem of the device cannot be found as much as possible in a static test, the dynamic test process cannot be smoothly developed, so that the commercial operation key path of the unit is influenced. Meanwhile, the daily maintenance and regular inspection of the device are all carried out under a static state, so that the daily operation and troubleshooting of the device are not facilitated.
Therefore, it is necessary to find a device and a test method for performing dynamic simulation experiment on the photodiode monitoring device under a static condition.
Disclosure of Invention
The invention provides a nuclear power station dynamic simulation test system and a test method for simulating a nuclear power station exciter rotating diode monitoring device to realize dynamic simulation test under static state, aiming at the problems of influence on dynamic test logic and later-stage problem analysis caused by incapability of carrying out more signal logic verification under static state in the prior art,
the technical scheme provided by the invention for the technical problem is as follows: a nuclear power station dynamic simulation test system is used for simulating a nuclear power station exciter rotating diode monitoring device, and comprises: the signal generator is used for simulating a working condition signal induced by the sensor under the dynamic condition of the exciter; the monitoring module is connected with the signal generator and is used for processing and judging the working condition signals sensed by the sensor and outputting a judgment result; and the test module is connected with the signal generator and the monitoring module and used for receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, verifying the correctness of the judgment result output by the monitoring module and realizing the dynamic simulation test under a static state.
Wherein the signal generator comprises: the compiling module is used for compiling working condition signals induced by the sensor under various working conditions of the exciter, wherein the working condition signals are voltage signals and comprise phase failure signals and normal signals; the control module is connected with the compiling module and used for calling voltage signal waveforms stored in the compiling module and corresponding to various working conditions of the exciter; and the output module is connected with the control module and used for sending voltage signal waveforms under corresponding working conditions to the monitoring module.
Wherein the monitoring module comprises: the signal processing module is connected with the output module and is used for filtering, amplifying and amplitude limiting the received voltage signal and outputting a square wave signal; the judging module is used for comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result; and the state output module is connected with the judgment module and used for displaying or alarming the judgment result.
Wherein the test module comprises: the first receiving module is connected with the signal generator and used for receiving the working condition signal sent by the signal generator; the second receiving module is connected with the monitoring module and used for receiving the judgment result; and the verification module is used for verifying the correctness of the processing result according to the state of the working condition signal.
The system comprises a monitoring module, a locking verification module and a locking verification module, wherein the locking verification module is used for verifying the locking monitoring function of the monitoring module; the lockout verification module further comprises: the excitation machine cabinet is connected with the monitoring module, and the generator simulator is respectively connected with the excitation machine cabinet and the monitoring module; the generator simulator is used for simulating a special working condition of a generator, and a locking signal is sent to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the locking signal of the monitoring module.
Wherein the blocking signal comprises: a locking signal with low generator voltage, a locking signal with high exciting current change rate and a locking signal with low exciting current; and taking a locking signal with low generator voltage, a locking signal with high exciting current change rate, a locking signal with low exciting current and a soft switching signal as conditions for locking the monitoring module to be put into operation.
The monitoring module comprises at least three-channel interface circuits, each interface circuit is connected with a signal processing module, the signal generator respectively outputs three working condition signals at the same position, each working condition signal is input into each corresponding judging module after being subjected to signal processing by the corresponding signal processing module, a calculating unit in each judging module counts a plurality of square wave signals in a period, compares the square wave signals with a standard number to calculate the phase failure number, and sends out a phase failure alarm and trip signal according to the action judging logic of taking 2 out of three channels 3; the test module is also used for verifying the correctness of the phase failure alarm and trip signal; performing locking verification on the locking function of the monitoring module; the lockout monitoring module verification comprises: the monitoring module receives a fault phase failure signal sent by the signal sender, if the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, the monitoring module is locked according to locking logic verification, and phase failure judgment is not made.
On the other hand, the invention also provides a dynamic simulation test method for the nuclear power station, which comprises the following steps:
s1, simulating a working condition signal induced by the sensor under the dynamic condition of the exciter;
s2, processing and judging the working condition signal sensed by the sensor, and outputting a judgment result;
and S3, receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, and verifying the correctness of the judgment result output by the monitoring module according to the state of the working condition signal, so as to realize the dynamic simulation test under the static state.
Wherein the step S1 further includes the following processing:
s11, compiling working condition signals induced by the sensor under various working conditions of the exciter, wherein the working condition signals are voltage signals and comprise phase failure signals and normal signals;
s12, calling voltage signal waveforms stored in the exciter and corresponding to various working conditions;
s13, sending voltage signal waveforms under corresponding working conditions to the monitoring module;
the step S2 further includes the following processing:
s21, filtering, amplifying and amplitude limiting the received voltage signal, and outputting a square wave signal;
s22, comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result;
and S23, displaying or alarming the judgment result.
The step S3 is followed by a step S4 of verifying a lockout monitoring function of the monitoring module; the method specifically comprises the following steps: simulating a fault working condition of the generator, and sending a locking signal to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the locking signal of the monitoring module;
the blocking signal includes: and setting a locking signal with low generator voltage, a locking signal with high exciting current change rate, a locking signal with low exciting current and a soft switching signal as conditions for locking the operation of the monitoring module.
Each interface circuit of the monitoring module is connected with a signal processing module, the signal generator respectively outputs three working condition signals at the same position, each working condition signal is input into each corresponding judging module after being subjected to signal processing by the corresponding signal processing module, a calculating unit in each judging module counts a plurality of square wave signals in one period, compares the square wave signals with a standard number to calculate the phase failure number, and sends out phase failure alarm and trip signals according to the action judging logic of taking 2 out of three channels 3; and verifying the correctness of the phase failure alarm and trip signal.
The locking function of the monitoring module is verified; the method comprises the following steps: and receiving a fault phase failure signal sent by the signal sender, if the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, and according to locking logic verification, the monitoring module is locked without phase failure judgment.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the invention carries out dynamic simulation experiment on the exciter rotating diode monitoring device under the static condition, and by designing open-phase waveforms by self, when carrying out signal verification, the invention calls corresponding open-phase waveforms designed in advance to carry out comparison verification, and combines the test principle of a generator simulator for simulating dynamic working conditions, and verifies the correctness of the judgment result output by the rotating diode monitoring device (monitoring module), thereby realizing the dynamic simulation experiment under the static condition, finding out the problem that a plurality of devices are inconsistent with design files and programs in advance, solving the problems one by one, and striving for a great period of time for the later-stage starting key path of the unit. The method solves the problem that more signal logic verification can not be carried out under the static condition in the prior art, and the defect is amplified when a unit of a new technology is particularly used and no reference power station is provided. For the new technology, the invention can find the problem of dynamic signal logic in advance and solve the problem in advance, thereby greatly saving the construction period of a main line of a unit; meanwhile, the device has great reference value for device overhaul and troubleshooting.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic simulation test system of a nuclear power plant according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a static test of a dynamic simulation test system of a nuclear power plant according to a first embodiment of the present invention.
Fig. 3 is a diagram of an output voltage waveform of a function generator according to an embodiment of the present invention.
Fig. 4 is a flowchart of a dynamic simulation test method for a nuclear power plant according to a second embodiment of the present invention.
Detailed Description
The invention aims to solve the problems that the prior art can not carry out more signal logic verification under the static condition, can not find the problem on the dynamic signal logic in advance, can influence the dynamic test logic and the later problem analysis, can prolong the main line construction period of a unit, and can influence the normal operation, and provides a dynamic simulation test system and a test method for a nuclear power station, which are used for simulating the actual working condition signal of a nuclear power station exciter, can solve the problems that how to simulate the dynamic simulation test under the static condition, carry out the dynamic simulation test on a DNC device, test the logic correctness, and realize the dynamic simulation test under the static condition, and the core idea of the dynamic simulation test system and the test method is as follows: the method comprises the steps that a signal generator is adopted to simulate the output waveform of a sensor under the dynamic condition of a rotating part of an exciter, a generator simulator is utilized to simulate the special working condition of a generator, and a locking signal is sent to a DNC device (namely a monitoring module) to verify the reliability of the locking signal of the DNC device; a generator simulator is connected with an AVR (excitation regulator) to simulate the closed-loop operation condition of a generator, and the action logic of the DNC device under the normal and open-phase conditions is simulated and verified. The output voltage waveform of the function generator which is self-designed and editable simulates the voltage waveforms which are lower than the base value voltage and are respectively disconnected in one phase, two phases and three phases under the normal working condition so as to verify the phase-failure judging logic and the signaling tripping logic. The method comprises the steps of performing step change and magnetic increase and decrease on an excitation regulator by using an AVR closed-loop operation working condition simulated by a generator simulator, and simulating Umin, DI/DT and Imin action working conditions to verify the reliability of a locking signal of a DNC device; and an effective guarantee is provided for the correct judgment of the phase failure signal.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
The embodiment of the invention provides a dynamic simulation test system of a nuclear power station, and referring to fig. 1, the system comprises a signal generator 100, a control unit and a control unit, wherein the signal generator is used for simulating a working condition signal induced by a sensor under the dynamic condition of an exciter; the monitoring module 200 is connected with the signal generator 100 and is used for processing and judging the working condition signal sensed by the sensor and outputting a judgment result; the test module 300 is connected with the signal generator 100 and the monitoring module 200, and is configured to receive the working condition signal sent by the signal generator and the determination result output by the monitoring module, verify the correctness of the determination result output by the monitoring module, and implement a dynamic simulation test in a static state.
Further, in conjunction with fig. 1, the signal generator 100 further includes: the compiling module 101 is used for compiling the working condition signals induced by the sensor under various working conditions of the exciter, wherein the working condition signals are voltage signal waveforms and comprise open-phase signal waveforms and normal signal waveforms; the control module 102 is connected with the compiling module 101 and used for calling voltage signal waveforms stored in the compiling module and corresponding to various working conditions of the exciter; and the output module 103 is connected to the control module 102 and configured to send a voltage signal waveform under a corresponding working condition to the monitoring module 200. The voltage signal waveform curves corresponding to various working conditions of the exciter are stored in the memory and are used for being called in real time during testing.
Further, in conjunction with fig. 1, the monitoring module 200 (i.e., the rotating diode monitoring device) further includes:
the signal processing module 201 is connected to the output module 102, and is configured to filter, amplify and amplitude-limit the received voltage signal, and output a square wave signal; the judging module 202 is used for comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result; and the state output module 203 is connected with the judging module 202 and is used for displaying or alarming the judging result.
Further, in conjunction with fig. 1, the test module 300 includes: the first receiving module 301 is connected to the signal generator 100, and is configured to receive a working condition signal sent by the signal generator; a second receiving module 302, connected to the monitoring module 200, for receiving the determination result; and the verification module 303 is configured to verify the correctness of the processing result according to the state of the working condition signal.
Further, with reference to fig. 1, the system further includes a lockout verification module 400 for verifying a lockout monitoring function of the monitoring module; the lockout verification module 400 further includes: the monitoring system comprises an excitation cabinet 401 connected with a monitoring module 200, and a generator simulator 402 respectively connected with the excitation cabinet 401 and the monitoring module 200; the generator simulator is used for simulating the special working condition of the generator, and the blocking signal is sent to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the blocking signal of the monitoring module.
FIG. 2 is a schematic diagram of a static test of a dynamic simulation test system of a nuclear power plant, which includes: the system comprises a computer connected with a signal generator, wherein the signal generator simulates waveforms output by three Hall sensors under a dynamic condition to an input interface of a monitoring module (namely a rotating diode monitoring device), the three input interfaces are respectively connected with corresponding signal processing circuits, the monitoring module comprises an NCD178 board card, various signal indicator lamp output interfaces, an open-phase alarm signal and a trip signal output port, an excitation regulating cabinet inputs Imin (low excitation current latching) and DI/DT (high excitation current change rate latching) signals into the rotating diode monitoring device and also receives a voltage rated value of a stator of a UST generator, and a generator simulator is connected to the rotating diode monitoring device through the excitation regulating cabinet; the output end of the rotating diode monitoring device is also connected with a high-speed wave recorder and is used for recording the waveform of the relevant point. The invention outputs voltage waveform (see the waveform in figure 3, according to the voltage gap in a period, the designed waveform is respectively the waveform of open 3 phase, open 1 phase, open 2 phase and open 4 phase corresponding to up, down, left and right sides) by self-designing an editable function generator, simulates the voltage waveform when several phases of voltage are lower than the basic value voltage and are respectively open one phase, two phases and three phases under normal working condition, and is used for verifying open-phase discrimination logic and signal-sending tripping logic. The AVR closed-loop operation condition simulated by the generator simulator is used for performing step change and magnetic increase and decrease on the excitation regulator, and the Umin, DI/DT and Imin action conditions are simulated to verify the reliability of the locking signal of the DNC device.
The working principle in fig. 2 is described as follows: latching logic verification analysis: in order to prevent false alarm or tripping caused by corresponding deviation of output of the rotating diode monitoring device when the output voltage of a Hall sensor probe is low, the excitation current fluctuation is large and other abnormal working conditions are caused, Umin (low voltage locking of a generator), Imin (low locking of the excitation current), DI/DT (high locking of the excitation current change rate) signals and soft switching signals are specially set as conditions for locking DNC operation. The generator simulator is connected to the AVR, the AVR is switched in, closed-loop operation of an excitation system is simulated, a designed waveform is input into the signal generator and is connected into a signal input port of the rotating diode monitoring device, and normal operation working conditions of the exciter are simulated, so that the rotating diode monitoring device is in a switching operation state. And then gradually reducing the voltage of the generator on the AVR until the Umin signal lamp acts, confirming that the rotating diode monitoring device is locked at the moment, and enabling the locking lamp to be on.
The generator simulator is connected to the AVR to simulate closed-loop operation of an excitation system, the input AVR uses a designed waveform to be input into the signal generator, and the signal generator is connected to a signal input port of the rotating diode monitoring device to simulate normal working conditions, so that the rotating diode monitoring device is in an input operation state. And then, carrying out soft switching operation on the AVR, and judging that the working function of the rotary diode monitoring device is normal by checking the lighting of an operation lamp of a board card.
Similarly, the generator simulator is connected to the AVR to simulate closed-loop operation of an excitation system, the input AVR uses a designed waveform to be input into the signal generator, and the signal generator is connected to a signal input port of the rotating diode monitoring device to simulate normal working conditions, so that the rotating diode monitoring device is in an input operation state. Then, the magnetic increasing and reducing operation is carried out on the AVR, the exciting current is reduced, the Imin signal is simulated, and according to a design program, the Imin signal lamp is checked to be on, the device is locked, the locked device is locked and the like is on. But after the test finds Imin action, no signal lamp is on the rotating diode monitoring device, and the novel rotating diode monitoring board card is judged preliminarily and cannot trigger the signal lamp to be on. In order to further confirm the actual locking function, after the exciting current is restored to a normal value on the AVR, a designed open-phase waveform is used and input into the signal generator, the input waveform of the rotating diode monitoring device is changed to simulate the open-phase working condition under the dynamic condition, the fact that the rotating diode monitoring device does not send out the open-phase signal is checked, the exciting current is reduced on the AVR to Imin action, and the fact that the open-phase signal of the rotating diode monitoring device is normally sent out is found to be not consistent with the expected action condition. The locking condition considered when the novel DNC device is designed is judged to be Imin which is 0, the normal operation working condition is Imin which is 1, but not the normal operation working condition Imin which is designed by AVR which is 0, when the exciting current is too low, Imin which is 1, the interface is just opposite to the design, so that the triggering condition of AVR to Imin needs to be modified, and the state of the input signal needed by the DNC device is kept consistent.
The DI/DT locking condition testing method is basically consistent with Imin, the DI/DT locking condition testing method is connected to an AVR through a generator simulator, the AVR is put into operation, closed-loop operation of an excitation system is simulated, normal working conditions are simulated through a signal generator, a rotating diode monitoring device is in an put-into-operation state, step tests are carried out on the AVR, excitation current is enabled to rise or fall rapidly, DI/DT signals are simulated, and according to a design program, a DI/DT signal lamp is checked to be on at the moment, the device is locked, locked and the like are on. However, after the DI/DT is found to act through tests, no signal lamp is on the rotary diode monitoring device, and the signal lamp cannot be triggered to light through preliminary judgment of the novel DNC board card. In order to further confirm the actual locking function, after the exciting current is restored to a normal value on the AVR, any dynamic open-phase working condition is simulated through the signal generator, the DNC is checked to correctly send out an open-phase signal, a step test is carried out on the AVR, DT/DT action is simulated, the DNC open-phase signal is locked, the DNC open-phase signal is matched with the expected action logic, although a signal lamp of the DNC is not displayed, the locking logic is correct, and a manufacturer only needs to modify a design file.
In order to confirm whether the switching-in and switching-out and locking functions of the rotary diode monitoring device are normal or not under the dynamic condition, the test finds that Imin and DI/DT are not displayed by indicator lamps, cannot be visually judged by the indicator lamps and are not in accordance with the program; the locking function of Imin is just opposite to the actual working condition and is not in accordance with the design file, so that the DNC device is always locked by the Imin signal after the unit is started, the DNC device cannot be visually judged and cannot be monitored easily due to the fact that no signal indicating lamp exists, and the DNC device cannot normally act if a fault occurs.
Action logic verification analysis: after the three Hall sensors acquire signals output by the rotary diode, the signals respectively enter three channels for processing and analysis, and are output as square wave signals after passing through a blocking link, a filtering link, an amplifying link, an amplitude limiting link and a comparing link, wherein a jumper wire is arranged in front of the amplitude limiting link and used for adjusting the phase reversal of output waveforms at the negative electrode. And each channel counts the square wave signals within one period, compares the square wave signals with the standard number, and calculates out the phase failure number. And the judgment results of the three channels are used as final outlet conditions through a two-out-of-three logic.
Connecting a generator simulator to the AVR, inputting the AVR, simulating closed-loop operation of an excitation system, inputting a designed waveform into a signal generator, and inputting a signal input port of a rotating diode monitoring device, simulating normal working conditions, so that the rotating diode monitoring device is in an input operation state, sampling and recording each link by using a high-speed recorder according to the amplitude of the input simulated waveform, checking and confirming that the output result of the link is consistent with the design, and confirming the correctness of processing and calculation of each link.
And changing the waveform input to the rotary diode monitoring device by the signal generator by using the designed waveform, simulating dynamic phase-off 1, phase-off 2 and phase-off 3 working conditions, and checking whether the corresponding alarm indicator lamp, the output alarm signal and the trip signal on the DNC device are correct or not. The test shows that the phase 2 is disconnected and the phase 1 is disconnected, the signal lamp displayed by the device is not in accordance with the program, and the device cannot send out a trip instruction when the phase 2 is disconnected and is not in accordance with the design file.
The designed waveform is used, the waveform input to the rotating diode monitoring device by the signal generator is changed, only 1 channel open-phase or 2 channels open-phase of 3 channels is simulated, and 2 logics of 3 of three channels are verified under the condition of open-phase. The list shows the waveform and the working condition of the channel input, and the resultant relationship.
In conclusion, the dynamic simulation experiment is carried out on the rotating diode monitoring device under the static condition, the logic correctness of the rotating diode monitoring device is checked, the problem of the dynamic signal logic can be found out in advance and solved in advance, and the construction period of a main line of a unit is greatly saved; meanwhile, the method has great reference value for device maintenance and troubleshooting, and great construction period is strived for a key path for unit later-stage starting.
Example two
The invention provides a dynamic simulation test method for a nuclear power station, which is suitable for a system shown in the first embodiment, and referring to fig. 4, the method comprises the following steps:
s1, simulating a working condition signal induced by the sensor under the dynamic condition of the exciter;
s2, processing and judging the working condition signal sensed by the sensor, and outputting a judgment result;
and S3, receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, and verifying the correctness of the judgment result output by the monitoring module according to the state of the working condition signal, so as to realize the dynamic simulation test under the static state.
In a further embodiment, step S1 further includes the following steps:
s11, compiling working condition signals induced by the sensor under various working conditions of the exciter, wherein the working condition signals are voltage signals and comprise phase failure signals and normal signals;
s12, calling voltage signal waveforms stored in the exciter and corresponding to various working conditions;
s13, sending voltage signal waveforms under corresponding working conditions to the monitoring module;
step S2 further includes the following processing:
s21, filtering, amplifying and amplitude limiting the received voltage signal, and outputting a square wave signal;
s22, comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result;
and S23, displaying or alarming the judgment result.
In another embodiment, the step S3 is followed by the step S4 of verifying the lock monitoring function of the monitoring module; the method specifically comprises the following steps: simulating a fault working condition of the generator, and sending a locking signal to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the locking signal of the monitoring module;
the blocking signal includes: and setting a locking signal with low generator voltage, a locking signal with high exciting current change rate, a locking signal with low exciting current and a soft switching signal as conditions for locking the operation of the monitoring module. Each interface circuit of the monitoring module is connected with a signal processing module, the signal generator respectively outputs three working condition signals at the same position, each working condition signal is input into each corresponding judging module after being subjected to signal processing by the corresponding signal processing module, a calculating unit in each judging module counts a plurality of square wave signals in a period, the square wave signals are compared with a standard number to calculate out a phase failure number, and a phase failure alarm and trip signal is sent out according to an action judging logic of taking 2 out of three channels 3; and verifying the correctness of the phase failure alarm and trip signal. Performing locking verification on the locking function of the monitoring module; the method comprises the following steps: and receiving a fault phase failure signal sent by the signal sender, if the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, and according to locking logic verification, the monitoring module is locked without phase failure judgment.
It should be noted that: in the embodiment, when the system is implemented in a test method, only the division of the functional modules is used for illustration, and in practical application, the functions may be distributed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules, so as to complete all or part of the functions described above. In addition, the system and method embodiments provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in detail in the method embodiments and are not described herein again.
Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing associated hardware, and the program may be stored in a computer readable storage medium. The above mentioned control or switching function is realized by a controller, and the controller may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The above-mentioned storage may be a storage device built in the terminal, such as a hard disk or a memory. The system of the invention also comprises a memory which can also be an external storage device of the system, a plug-in hard disk, an intelligent memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like. The memory may also include both internal storage units of the system and external storage devices for storing computer programs and other programs and information as needed. The memory may also be used to temporarily store information that has been output or is to be output.
In summary, the invention designs the open-phase waveform by itself, and combines the test principle of the generator simulator simulating the dynamic working condition, the existing exciter rotating part simulates the working condition signal induced by the sensor under the dynamic condition of the exciter through the signal generator, and transmits the working condition signal to the monitoring module through the corresponding signal processing circuit for open-phase logic judgment, the open-phase signal adopts the judgment logic of two out of three as the final outlet condition, and the real open-phase signal is verified according to the received locking signal of the generator simulator. If a fault open-phase signal sent by the signal transmitter is received, the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, the monitoring module is locked according to locking logic verification, and open-phase judgment is not made. In addition, the action logic and the lockout logic are further verified and analyzed according to the verification module, more signal logic verification is carried out, dynamic simulation test is carried out under a static state, the problem of finding out the dynamic signal logic in advance is provided, the problem is solved in advance, and the unit main line construction period is greatly saved; meanwhile, the device has great reference value for device overhaul and troubleshooting.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A nuclear power plant dynamic simulation test system is used for simulating a nuclear power plant exciter rotating diode monitoring device, and is characterized by comprising:
the signal generator is used for simulating a working condition signal induced by the sensor under the dynamic condition of the exciter;
the monitoring module is connected with the signal generator and is used for processing and judging the working condition signals sensed by the sensor and outputting a judgment result;
the test module is connected with the signal generator and the monitoring module and used for receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, verifying the correctness of the judgment result output by the monitoring module and realizing the dynamic simulation test under a static state;
the locking verification module is used for verifying the locking monitoring function of the monitoring module;
the monitoring module includes:
the signal processing module is connected with the output module and is used for filtering, amplifying and amplitude limiting the received voltage signal and outputting a square wave signal;
the judging module is used for comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result;
the state output module is connected with the judgment module and used for displaying or alarming the judgment result;
the lockout verification module further comprises: the excitation machine cabinet is connected with the monitoring module, and the generator simulator is respectively connected with the excitation machine cabinet and the monitoring module;
the generator simulator is used for simulating the working condition of the generator, and locking signals are sent to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the locking signals of the monitoring module.
2. The system of claim 1, wherein the signal generator comprises:
the compiling module is used for compiling working condition signals induced by the sensor under various working conditions of the exciter, wherein the working condition signals are voltage signals and comprise phase failure signals and normal signals;
the control module is connected with the compiling module and used for calling voltage signal waveforms stored in the compiling module and corresponding to various working conditions of the exciter;
and the output module is connected with the control module and used for sending voltage signal waveforms under corresponding working conditions to the monitoring module.
3. The system of claim 1, wherein the testing module comprises:
the first receiving module is connected with the signal generator and used for receiving the working condition signal sent by the signal generator;
the second receiving module is connected with the monitoring module and used for receiving the judgment result;
and the verification module is used for verifying the correctness of the processing result according to the state of the working condition signal.
4. The system of claim 1, wherein the blocking signal comprises: a locking signal with low generator voltage, a locking signal with high exciting current change rate and a locking signal with low exciting current;
and taking a locking signal with low generator voltage, a locking signal with high exciting current change rate, a locking signal with low exciting current and a soft switching signal as conditions for locking the monitoring module to be put into operation.
5. The system according to any one of claims 1 to 4, wherein the monitoring module comprises at least three-channel interface circuits, each interface circuit is connected with a signal processing module, the signal generator respectively outputs three working condition signals at the same position, each working condition signal is input into each corresponding judging module after being processed by the corresponding signal processing module, a calculating unit in each judging module counts a plurality of square wave signals in one period, compares the square wave signals with a standard number to calculate the phase failure number, and sends out phase failure alarm and trip signals according to the action judging logic of taking 2 out of three channels 3;
the test module is also used for verifying the correctness of the phase failure alarm and trip signal; performing locking verification on the locking function of the monitoring module;
the lockout monitoring module verification comprises: the monitoring module receives a fault phase failure signal sent by the signal sender, if the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, the monitoring module is locked according to locking logic verification, and phase failure judgment is not made.
6. A method for dynamic simulation testing of a nuclear power plant, using the system of claim 1, the method comprising the steps of:
simulating a working condition signal induced by a sensor under the dynamic condition of an exciter;
processing and judging the working condition signal sensed by the sensor, and outputting a judgment result;
and receiving the working condition signal sent by the signal generator and the judgment result output by the monitoring module, and verifying the correctness of the judgment result output by the monitoring module according to the state of the working condition signal, thereby realizing the dynamic simulation test under a static state.
7. The method of claim 6, wherein simulating the sensor-induced operating condition signal for exciter dynamics further comprises:
compiling working condition signals induced by a sensor under various working conditions of the exciter, wherein the working condition signals are voltage signals and comprise open-phase signals and normal signals;
calling voltage signal waveforms stored in the exciter and corresponding to various working conditions;
sending a voltage signal waveform under a corresponding working condition to the monitoring module;
the processing and judging the working condition signal induced by the sensor and outputting the judgment result further comprise the following steps:
filtering, amplifying and amplitude limiting the received voltage signal, and outputting a square wave signal;
comparing the square wave signal with an exciter standard working condition signal, determining whether an exciter rotating diode is open-phase or not according to action judging logic, and outputting a judging result;
and displaying or alarming the judgment result.
8. The method according to claim 7, wherein the step of receiving the operating condition signal sent by the signal generator and the judgment result output by the monitoring module, and verifying the correctness of the judgment result output by the monitoring module according to the state of the operating condition signal further comprises the following steps: verifying the locking monitoring function of the monitoring module;
the method specifically comprises the following steps: simulating a fault working condition of the generator, and sending a locking signal to the monitoring module through the generator simulator and/or the excitation cabinet so as to verify the reliability of the locking signal of the monitoring module;
the blocking signal includes: and setting a locking signal with low generator voltage, a locking signal with high exciting current change rate, a locking signal with low exciting current and a soft switching signal as conditions for locking the operation of the monitoring module.
9. The method according to claim 8, wherein each interface circuit of the monitoring module is connected with a signal processing module, the signal generator respectively outputs three working condition signals at the same position, each working condition signal is input into each corresponding judging module after being processed by the corresponding signal processing module, a calculating unit in each judging module counts a plurality of square wave signals in one period, compares the square wave signals with a standard number to calculate out a phase failure number, and sends out a phase failure alarm and trip signal according to an action judging logic of taking 2 out of three channels 3; and verifying the correctness of the phase failure alarm and trip signal.
10. The method of claim 8, wherein a lockout function of the monitoring module is verified; the method comprises the following steps:
and receiving a fault phase failure signal sent by the signal sender, if the generator simulator generates a locking signal of one of the three locking signals and sends the locking signal to the monitoring module, and according to locking logic verification, the monitoring module is locked without phase failure judgment.
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