CN109752655B - Excitation regulator trigger pulse detection method and device, detector and test tool - Google Patents
Excitation regulator trigger pulse detection method and device, detector and test tool Download PDFInfo
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Abstract
The application relates to a method and a device for detecting trigger pulse of an excitation regulator, a detector and a test tool. The excitation regulator trigger pulse detection method comprises the following steps: acquiring a voltage wave of synchronous voltage input to the excitation regulator to be tested and a pulse wave of trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be tested; reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave; acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero crossing point time information of the voltage wave and the zero crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave; and comparing the relative phase difference of the pulse waves with a preset reference range, and generating detection result information corresponding to the trigger pulse. By adopting the method and the device, the situation that the operation stability of the generator is reduced due to the fact that a user uses the excitation regulator to be tested with abnormal functions can be avoided.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a method and a device for detecting trigger pulses of an excitation regulator, a detector and a test tool.
Background
The excitation system is an important component of the generator, and has great influence on the safe and stable operation of the power system and the generator. The excitation system generally includes an excitation power unit for supplying an excitation current to a rotor of the synchronous generator, and an excitation regulator for controlling the output of the excitation power unit by controlling the phase of a trigger pulse of a thyristor according to an input synchronous voltage and a given regulation reference signal.
However, during the actual operation of the excitation system, the excitation regulator may malfunction due to various factors, such as no trigger pulse being output or an abnormal phase of the trigger pulse. Users generally cannot know the functional condition of the excitation regulator, and the excitation regulator with abnormal function causes abnormal control of the excitation current, so that the running stability of the generator is poor.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a detector and a test fixture for detecting excitation regulator trigger pulse, which can avoid reducing the operation stability of the generator.
A method of excitation regulator trigger pulse detection, the method comprising:
acquiring a voltage wave of synchronous voltage input to a tested excitation regulator and a pulse wave of a trigger pulse of a controlled silicon corresponding to the synchronous voltage output by the tested excitation regulator;
reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave;
acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and comparing the relative phase difference of the pulse waves with a preset reference range, and generating detection result information corresponding to the trigger pulse.
An excitation regulator trigger pulse detection apparatus, the apparatus comprising:
the signal acquisition module is used for acquiring a voltage wave of synchronous voltage input to the excitation regulator to be tested and a pulse wave of a trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be tested;
the information reading module is used for reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave;
the phase comparison module is used for acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and the comparison detection module is used for performing comparison processing according to the relative phase difference of the pulse waves and a preset reference range and generating detection result information corresponding to the trigger pulse.
A detector comprising a memory and a processor, the memory storing a computer program which when executed by the processor performs the steps of:
acquiring a voltage wave of synchronous voltage input to a tested excitation regulator and a pulse wave of a trigger pulse of a controlled silicon corresponding to the synchronous voltage output by the tested excitation regulator;
reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave;
acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and comparing the relative phase difference of the pulse waves with a preset reference range, and generating detection result information corresponding to the trigger pulse.
A test tool comprises a waveform shaping circuit and the detector, wherein the waveform shaping circuit is connected with a voltage input end and a pulse output end of an excitation regulator to be tested and is connected with the detector;
the waveform shaping circuit receives the synchronous voltage input to the excitation regulator to be tested and the trigger pulse output by the excitation regulator to be tested to the controlled silicon corresponding to the synchronous voltage, carries out waveform shaping on the synchronous voltage and the trigger pulse, and outputs the voltage wave shaped by the synchronous voltage and the pulse wave shaped by the trigger pulse to the detector.
According to the excitation regulator trigger pulse detection method, the device, the detector and the test tool, the voltage wave of the synchronous voltage input to the tested excitation regulator and the pulse wave of the trigger pulse of the silicon controlled rectifier corresponding to the synchronous voltage output by the tested excitation regulator are combined for processing, the phase difference of the pulse wave relative to the corresponding voltage wave is obtained, the relative phase difference of the pulse wave is compared with a preset reference range, and the detection result information corresponding to the trigger pulse is generated according to the comparison result. Therefore, the trigger pulse output by the tested excitation regulator can be automatically detected, and whether the trigger pulse normally reflects whether the silicon controlled rectifier trigger function of the tested excitation regulator is normal or not, so that the automatic detection of the silicon controlled rectifier trigger function of the tested excitation regulator can be realized, a user can conveniently know the function condition of the tested excitation regulator, and the situation that the user uses the tested excitation regulator with abnormal function to reduce the running stability of the generator is avoided.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting a trigger pulse of an excitation regulator according to an embodiment;
fig. 2 is a schematic flow chart illustrating a process of obtaining a phase difference of a pulse wave with respect to a corresponding voltage wave according to zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave in one embodiment to obtain a relative phase difference of the pulse wave;
FIG. 3 is a schematic flow chart of a method for detecting trigger pulses of an excitation regulator according to another embodiment;
FIG. 4 is a waveform diagram of a three-phase synchronous voltage and a shaped voltage wave in one embodiment;
FIG. 5 is a block diagram of an excitation regulator trigger detection apparatus according to an embodiment;
FIG. 6 is an internal block diagram of a detector in one embodiment;
FIG. 7 is a block diagram of the test fixture in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a method for detecting trigger pulse of excitation regulator is provided, which is described by taking the method as an example for terminal application, and includes the following steps:
s110: and acquiring a voltage wave of the synchronous voltage input to the excitation regulator to be tested and a pulse wave of a trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be tested.
The excitation regulator is used as a device for controlling the unit output of the excitation power, can output trigger pulses to the controllable silicon in the excitation power unit according to the input synchronous voltage and a given regulation reference signal, and controls the output of the excitation power unit by controlling the phase of the trigger pulses. The excitation regulator to be tested is the excitation regulator needing to test the accuracy of the trigger pulse. Specifically, the synchronous voltage input to the excitation regulator to be tested may be specifically synchronous with the voltage input to the excitation power unit, and may be multi-phase or single-phase. The silicon controlled rectifier corresponding to the synchronous voltage is the silicon controlled rectifier connected with the line for inputting the synchronous voltage; for alternating current, the synchronous voltage includes a positive phase voltage and a negative phase voltage, and correspondingly, one same synchronous voltage can correspond to two thyristors, and each thyristor respectively corresponds to one trigger pulse. For example, taking three phases as an example, the synchronous voltage input to the measured excitation regulator includes an a-phase voltage, a B-phase voltage, and a C-phase voltage, and the measured excitation regulator may output trigger pulses to six thyristors, that is, six trigger pulses.
The voltage wave acquired by the terminal is a signal corresponding to the synchronous voltage and in a form recognizable by the terminal, and specifically may be a signal obtained by waveform shaping the synchronous voltage. The pulse wave acquired by the terminal is a signal corresponding to the trigger pulse and in a form recognizable by the terminal, and specifically may be a signal obtained by performing waveform shaping on the trigger pulse. Specifically, the terminal may receive the voltage wave after the synchronous voltage shaping and the pulse wave after the trigger pulse shaping. For example, the voltage wave and the pulse wave in the form of square waves can be obtained by waveform shaping the synchronization voltage and the trigger pulse by a waveform shaping circuit, and the terminal receives the voltage wave and the pulse wave output by the waveform shaping circuit. It can be understood that the terminal may also collect the synchronous voltage and the trigger pulse, and perform waveform shaping on the synchronous voltage and the trigger pulse respectively to obtain a corresponding voltage wave and a corresponding pulse wave.
S130: and reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave.
The zero-crossing point time information of the wave refers to the corresponding time when the waveform passes through the zero point. Specifically, the zero-crossing point time information of the voltage wave includes a zero-crossing point time when the waveform is switched from positive phase to negative phase in each cycle and a zero-crossing point time when the waveform is switched from negative phase to positive phase in the corresponding cycle; the zero-crossing point time information of the pulse wave includes the zero-crossing point time when the waveform starts to rise to the positive phase and the zero-crossing point time when the waveform starts to fall to the negative phase in each period.
Specifically, the terminal may obtain zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave by performing zero-crossing point analysis or image recognition on the voltage wave and the pulse wave in recognizable forms, or may receive the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave input by the user.
S150: and acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave, so as to obtain the relative phase difference of the pulse wave.
The phase difference of the pulse wave with respect to the corresponding voltage wave is a phase difference of the pulse wave with respect to the voltage wave corresponding to the pulse wave. The silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave; that is, the voltage wave corresponding to the pulse wave is a voltage wave of the synchronous voltage corresponding to the thyristor corresponding to the pulse wave. For example, taking the example that the phase voltage A, the phase voltage B and the phase voltage C share three phases, the phase voltage A corresponds to the thyristor 1, the phase voltage B corresponds to the thyristor 2, and the phase voltage C corresponds to the thyristor 3; the relative phase difference of the pulse wave of the thyristor 1 is the phase difference of the pulse wave of the thyristor 1 relative to the voltage wave of the a-phase voltage, the relative phase difference of the pulse wave of the thyristor 2 relative to the voltage wave of the B-phase voltage, and the relative phase difference of the pulse wave of the thyristor 3 relative to the voltage wave of the C-phase voltage. Specifically, when there are a plurality of pulse waves, the terminal obtains the relative phase difference of each pulse wave.
S170: and comparing the relative phase difference of the pulse waves with a preset reference range, and generating detection result information corresponding to the trigger pulse.
The preset reference range may be specifically set according to actual needs, and for example, may be set as a target phase range that a user needs to be reached by a trigger pulse output by the excitation regulator to be tested, or may be set as a range after the target phase range is adjusted.
The detection result information of the trigger pulse is information indicating whether the trigger pulse is normal or not. Specifically, at least two comparison results are obtained between the relative phase difference of the pulse wave and a preset reference range, each comparison result corresponds to one detection result information, and the terminal can generate corresponding detection result information according to the comparison results. Specifically, when there are multiple pulse waves, the relative phase difference of each pulse wave is compared with a preset reference range, so as to obtain detection result information of the trigger pulse corresponding to each pulse wave.
According to the excitation regulator trigger pulse detection method, a voltage wave of synchronous voltage input to the excitation regulator to be detected and a pulse wave of trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be detected are combined for processing, the phase difference of the pulse wave relative to the corresponding voltage wave is obtained, the relative phase difference of the pulse wave is obtained, then the relative phase difference of the pulse wave is compared with a preset reference range, and detection result information corresponding to the trigger pulse is generated according to the comparison result. Therefore, the trigger pulse output by the tested excitation regulator can be automatically detected, and whether the trigger pulse normally reflects whether the silicon controlled rectifier trigger function of the tested excitation regulator is normal or not, so that the automatic detection of the silicon controlled rectifier trigger function of the tested excitation regulator can be realized, a user can conveniently know the function condition of the tested excitation regulator, and the situation that the user uses the tested excitation regulator with abnormal function to reduce the running stability of the generator is avoided.
In one embodiment, referring to fig. 2, step S150 includes step S151 to step S153.
S151: and determining the period of the voltage wave according to the zero-crossing point time information of the voltage wave.
The voltage wave may include a waveform of a plurality of cycles, the cycle of the voltage wave being equal to a time difference between the same phases of two adjacent cycles. Specifically, the terminal may calculate a time difference between a zero-crossing point time when the waveform in one cycle is switched from the positive phase to the negative phase and a zero-crossing point time when the waveform in the next cycle is switched from the positive phase to the negative phase, or calculate a time difference between a zero-crossing point time when the waveform in one cycle is switched from the negative phase to the positive phase and a zero-crossing point time when the waveform in the next cycle is switched from the negative phase to the positive phase, to obtain the cycle of the voltage wave.
S153: and comparing the zero-crossing point time information of the pulse wave with the zero-crossing point time information of the corresponding voltage wave to obtain the same-phase interval time of the pulse wave relative to the corresponding voltage wave.
Specifically, the terminal selects zero-crossing point time information corresponding to one change trend of the voltage wave, and compares the zero-crossing point time information with zero-crossing point time information which is close to the selected zero-crossing point time information and has the same change trend in the pulse wave. Wherein the variation trend comprises an ascending trend and a descending trend; the waveform of the voltage wave is converted from a negative phase into a positive phase and the waveform of the pulse wave rises from a zero point to the positive phase with the same change trend, and both the change trends are rising trends; the waveform of the voltage wave is converted from a positive phase to a negative phase, and the waveform of the pulse wave has the same change trend from a zero point to the negative phase, and both the change trends are descending trends.
S155: and calculating the phase difference of the pulse wave relative to the corresponding voltage wave according to the same-phase interval time of the pulse wave relative to the corresponding voltage wave and the period of the corresponding voltage wave to obtain the relative phase difference of the pulse wave.
The period of the voltage wave and the same-phase interval time of the pulse wave relative to the corresponding voltage wave are determined by analyzing and calculating the zero-crossing point time information of the voltage wave and the pulse wave, and the relative phase difference of the pulse wave can be accurately calculated according to the same-phase interval time and the period of the voltage wave.
In one embodiment, the synchronous voltage corresponds to two thyristors, namely a positive phase thyristor connected to a positive phase voltage and a negative phase thyristor connected to a negative phase voltage, and the trigger pulse corresponding to the synchronous voltage comprises the trigger pulse of the positive phase thyristor and the trigger pulse of the negative phase thyristor. Correspondingly, the pulse wave corresponding to the synchronous voltage comprises a positive phase pulse wave and a negative phase pulse wave, wherein the positive phase pulse wave is the pulse wave of the trigger pulse of the positive phase thyristor, and the negative phase pulse wave is the pulse wave of the trigger pulse of the negative phase thyristor. The zero-crossing point time information of the positive-phase pulse wave comprises the rising edge time of the pulse, and the zero-crossing point time information of the negative-phase pulse wave comprises the falling edge time of the pulse; the zero-crossing point time information of the voltage wave comprises a voltage rising edge time and a voltage falling edge time. The pulse rising edge time refers to the zero crossing point time when the waveform starts to rise to a positive phase, and the pulse falling edge time refers to the zero crossing point time when the waveform starts to fall to a negative phase; the voltage rising edge time refers to the zero-crossing point time when the waveform is switched from negative phase to positive phase, and the voltage falling edge time refers to the zero-crossing point time when the waveform is switched from positive phase to negative phase.
In this embodiment, step S153 includes: counting the time length from the voltage rising edge moment of the voltage wave corresponding to the normal-phase pulse wave to the pulse rising edge moment of the normal-phase pulse wave to obtain the same-phase interval time of the normal-phase pulse wave relative to the corresponding voltage wave; and counting the time length from the voltage falling edge moment of the voltage wave corresponding to the reverse pulse wave to the pulse falling edge moment of the reverse pulse wave to obtain the same-phase interval time of the reverse pulse wave relative to the corresponding voltage wave.
Specifically, the voltage wave and the normal phase pulse wave may be placed on the same time axis for comparison, and according to the time sequence, the time length from the starting point to the cut-off point is counted from the voltage rising edge time of the voltage wave as the starting point to the pulse rising edge time most adjacent to the voltage rising edge time in the normal phase pulse wave as the cut-off point, so as to obtain the same phase interval time of the normal phase pulse wave relative to the corresponding voltage wave. The same can count the same phase interval time of the negative phase pulse wave relative to the corresponding voltage wave.
The pulse rising edge time of the positive-phase pulse wave is compared with the voltage rising edge time of the voltage wave, the pulse falling edge time of the negative-phase pulse wave is compared with the voltage falling edge time of the voltage wave, the positive-phase pulse wave and the negative-phase pulse wave are processed respectively, and the same-phase interval time of the positive-phase pulse wave and the same-phase interval time of the negative-phase pulse wave relative to the corresponding voltage wave are obtained respectively, so that the trigger pulse corresponding to the positive-phase pulse wave and the trigger pulse corresponding to the negative-phase pulse wave can be detected separately, and the accuracy is high.
In one embodiment, step S155 includes: calculating the ratio of the same-phase interval time of the pulse wave relative to the corresponding voltage wave to the period of the corresponding voltage wave to obtain the ratio of the pulse wave; and calculating to obtain the relative phase difference of the pulse waves according to the ratio of the pulse waves and the preset maximum phase, wherein the relative phase difference of the pulse waves is in direct proportion to the ratio of the pulse waves.
The preset maximum phase refers to a total phase of one cycle, for example, if a minimum phase of a voltage wave in one cycle is-180 °, and a maximum phase is +180 °, the total phase is 360 °, that is, the preset maximum phase may be set to 360 °. Taking the preset maximum phase equal to 360 ° as an example, the terminal may calculate the relative phase difference of the pulse waves according to the following formula:
αi＝(T2i/T1i)*360°；
where α i is the relative phase difference of the ith pulse wave, T1iT2 showing the period of the voltage wave corresponding to the ith pulse waveiIndicating the same phase interval time of the ith pulse wave relative to the corresponding voltage wave.
The relative phase difference of the pulse waves is obtained through calculation according to the ratio of the pulse waves and the preset maximum phase, and the processing is simple and convenient. Specifically, the relative phase difference of each positive-phase pulse wave and the relative phase difference of the negative-phase pulse waves may be calculated, respectively.
In one embodiment, the detection result information includes pulse normal information and pulse abnormal information. Correspondingly, referring to fig. 3, step S170 includes:
s171: and calculating the difference value of the relative phase difference of the pulse waves and the preset deviation phase to obtain the silicon controlled trigger phase shift angle.
S173: and if the trigger phase shift angle of the controllable silicon is within a preset reference range, generating pulse normal information.
S175: and if the trigger phase shift angle of the controllable silicon is not in the preset reference range, generating pulse abnormal information.
The preset deviation phase may be specifically set according to an actual situation, and specifically may be set according to a phase deviation of the line voltage with respect to the phase voltage. For example, taking the excitation power unit as a three-phase fully-controlled rectifier bridge as an example, the three-phase fully-controlled rectifier bridge is controlled by a line voltage UAB、UBC、UCAPhase position as reference, line voltage UAAnd phase voltage UABBy 30 deg., the preset offset phase may be set to 30 deg.. Specifically, the terminal can calculate the difference value of subtracting the preset deviation phase from the relative phase difference of the pulse wave to obtain the silicon controlled trigger phase shift angle.
And a silicon controlled trigger phase shift angle is obtained by shifting a preset deviation phase on the basis of the relative phase difference of the pulse wave, and the silicon controlled trigger phase shift angle is compared with a preset reference range to generate detection result information. Thus, the phase deviation is taken into account, and the accuracy is high.
Specifically, step S170 may further include: if the relative phase difference of the pulse wave is not acquired, pulse abnormality information is generated. The relative phase difference of the pulse waves is not acquired, which indicates that the excitation regulator to be tested may not output the trigger pulse, and the trigger function of the controllable silicon is abnormal.
Taking a self-shunt excitation system as an example, an excitation power unit is mostly a three-phase full-control rectifier bridge, the three-phase full-control rectifier bridge is evolved from a three-phase half-wave controllable rectifier circuit, the three-phase full-control rectifier bridge is formed by series combination of a three-phase half-wave common-cathode connection method (comprising three thyristors) and a three-phase half-wave common-anode connection method (comprising three thyristors), and 6 thyristors are correspondingly adopted for three-phase voltage. By adopting the excitation regulator trigger pulse detection method, the voltage waves shaped by the phase voltage Ta, the phase voltage Tb of A, the phase voltage Tc of B and the phase voltage Tc of C are respectively TA, TB and TC, and as shown in figure 4, the pulse waves shaped by the trigger pulses of 6 controllable silicon are respectively PA +, PA-, PB +, PB-, PC + and PC-. Taking phase A as an example, the treatment process comprises the following steps:
(1): the timing of the two rising edges of TA is timed to obtain the period of TA as T1.
(2): the same phase interval time of PA + with respect to TA is measured as T2 from the rising edge time of TA to the rising edge time of PA +. From this, PA + phase difference α 1 with respect to TA can be calculated as (T2/T1) × 360 °.
(3): the same phase interval time T3 of PA-relative to TA is measured from the falling edge time of TA to the falling edge time of PA-. From this, PA-360 ° can be calculated relative to TA with phase α 2 (T3/T1).
(4): this gives:
the phase shift angle alpha A + triggered by the thyristor of the positive phase A is alpha 1-30 degrees;
the thyristor trigger phase shift angle α a- α 2-60 ° of the negative a phase.
In the same way, the triggering phase shift angles of the phase B and the phase C silicon controlled rectifiers can be calculated.
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 5, there is provided an excitation regulator trigger detection apparatus including: a signal acquisition module 410, an information reading module 430, a phase comparison module 450, and a comparison detection module 470, wherein:
the signal obtaining module 410 is configured to obtain a voltage wave of a synchronous voltage input to the measured excitation regulator, and a pulse wave of a trigger pulse of a thyristor corresponding to the synchronous voltage output by the measured excitation regulator. The information reading module 430 is configured to read zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave. The phase comparison module 450 is configured to obtain a phase difference of the pulse wave with respect to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave, so as to obtain a relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave. The comparison detection module 470 is configured to perform comparison processing according to the relative phase difference of the pulse wave and a preset reference range, and generate detection result information corresponding to the trigger pulse.
The excitation regulator trigger pulse detection device combines the voltage wave of the synchronous voltage input to the excitation regulator to be detected and the pulse wave of the trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be detected for processing, obtains the phase difference of the pulse wave relative to the corresponding voltage wave to obtain the relative phase difference of the pulse wave, compares the relative phase difference of the pulse wave with a preset reference range, and generates detection result information corresponding to the trigger pulse according to the comparison result. Therefore, the trigger pulse output by the tested excitation regulator can be automatically detected, and whether the trigger pulse normally reflects whether the silicon controlled rectifier trigger function of the tested excitation regulator is normal or not, so that the automatic detection of the silicon controlled rectifier trigger function of the tested excitation regulator can be realized, a user can conveniently know the function condition of the tested excitation regulator, and the situation that the user uses the tested excitation regulator with abnormal function to reduce the running stability of the generator is avoided.
In one embodiment, the phase comparison module 450 includes a period determination unit (not shown), an interval time counting unit (not shown), and a relative phase difference calculation unit (not shown). The period determining unit is used for determining the period of the voltage wave according to the zero-crossing point time information of the voltage wave; the interval time counting unit is used for comparing the zero crossing point time information of the pulse wave with the zero crossing point time information of the corresponding voltage wave to obtain the same-phase interval time of the pulse wave relative to the corresponding voltage wave; the relative phase difference calculating unit is used for calculating the phase difference of the pulse wave relative to the corresponding voltage wave according to the same-phase interval time of the pulse wave relative to the corresponding voltage wave and the period of the corresponding voltage wave, so as to obtain the relative phase difference of the pulse wave.
The period of the voltage wave and the same-phase interval time of the pulse wave relative to the corresponding voltage wave are determined by analyzing and calculating the zero-crossing point time information of the voltage wave and the pulse wave, and the relative phase difference of the pulse wave can be accurately calculated according to the same-phase interval time and the period of the voltage wave.
In one embodiment, the pulse waves include positive phase pulse waves and negative phase pulse waves. The zero-crossing point time information of the positive-phase pulse wave comprises the rising edge time of the pulse, and the zero-crossing point time information of the negative-phase pulse wave comprises the falling edge time of the pulse; the zero-crossing point time information of the voltage wave comprises a voltage rising edge time and a voltage falling edge time. Correspondingly, the interval time counting unit is used for counting the time length from the voltage rising edge time of the voltage wave corresponding to the positive-phase pulse wave to the pulse rising edge time of the positive-phase pulse wave to obtain the same-phase interval time of the positive-phase pulse wave relative to the corresponding voltage wave; and counting the time length from the voltage falling edge moment of the voltage wave corresponding to the reverse pulse wave to the pulse falling edge moment of the reverse pulse wave to obtain the same-phase interval time of the reverse pulse wave relative to the corresponding voltage wave.
The pulse rising edge time of the positive-phase pulse wave is compared with the voltage rising edge time of the voltage wave, the pulse falling edge time of the negative-phase pulse wave is compared with the voltage falling edge time of the voltage wave, the positive-phase pulse wave and the negative-phase pulse wave are processed respectively, and the same-phase interval time of the positive-phase pulse wave and the same-phase interval time of the negative-phase pulse wave relative to the corresponding voltage wave are obtained respectively, so that the trigger pulse corresponding to the positive-phase pulse wave and the trigger pulse corresponding to the negative-phase pulse wave can be detected separately, and the accuracy is high.
In one embodiment, the relative phase difference calculating unit is used for calculating the ratio of the same-phase interval time of the pulse wave relative to the corresponding voltage wave to the period of the corresponding voltage wave to obtain the ratio of the pulse wave; and calculating to obtain the relative phase difference of the pulse waves according to the ratio of the pulse waves and the preset maximum phase, wherein the relative phase difference of the pulse waves is in direct proportion to the ratio of the pulse waves.
The relative phase difference of the pulse waves is obtained through calculation according to the ratio of the pulse waves and the preset maximum phase, and the processing is simple and convenient. Specifically, the relative phase difference of each positive-phase pulse wave and the relative phase difference of the negative-phase pulse waves may be calculated, respectively.
In one embodiment, the detection result information includes pulse normal information and pulse abnormal information. Correspondingly, the comparison detection module 470 is configured to calculate a difference between the relative phase difference of the pulse wave and a preset deviation phase to obtain a thyristor trigger phase shift angle, and generate pulse normal information if the thyristor trigger phase shift angle is within a preset reference range; and if the trigger phase shift angle of the controllable silicon is not in the preset reference range, generating pulse abnormal information.
And a silicon controlled trigger phase shift angle is obtained by shifting a preset deviation phase on the basis of the relative phase difference of the pulse wave, and the silicon controlled trigger phase shift angle is compared with a preset reference range to generate detection result information. Thus, the phase deviation is taken into account, and the accuracy is high.
For specific limitations of the excitation regulator trigger detection device, reference may be made to the above limitations of the excitation regulator trigger detection method, which are not described in detail here. The modules in the excitation regulator trigger pulse detection device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the detector, and can also be stored in a memory in the detector in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a detector is provided, which may be a terminal, the internal structure of which may be as shown in fig. 6. The detector includes a processor, memory, network interface, etc. connected by a system bus. Wherein the processor of the detector is configured to provide computational and control capabilities. The memory of the detector comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the detector is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an excitation regulator trigger detection method.
It will be appreciated by those skilled in the art that the configuration shown in fig. 6 is a block diagram of only a portion of the configuration relevant to the present application and does not constitute a limitation on the detector to which the present application is applied, and that a particular detector may include more or less components than shown in the figures, or combine certain components, or have a different arrangement of components.
In one embodiment, a detector is provided, comprising a memory in which a computer program is stored and a processor which, when executing the computer program, carries out the steps of the aforementioned excitation regulator trigger pulse detection method.
The detector realizes the steps of the excitation regulator trigger pulse detection method, and similarly, can realize automatic detection of the silicon controlled rectifier trigger function of the excitation regulator to be detected, so that a user can know the function condition of the excitation regulator to be detected conveniently, and the situation that the user uses the excitation regulator to be detected with abnormal functions to reduce the running stability of the generator is avoided.
In one embodiment, the test tool is characterized by comprising a waveform shaping circuit and the detector, wherein the waveform shaping circuit is connected with a voltage input end and a pulse output end of the excitation regulator to be tested and is connected with the detector. The waveform shaping circuit receives the synchronous voltage input to the excitation regulator to be tested and the trigger pulse of the silicon controlled rectifier corresponding to the synchronous voltage output by the excitation regulator to be tested, carries out waveform shaping on the synchronous voltage and the trigger pulse, and outputs a voltage wave shaped by the synchronous voltage and a pulse wave shaped by the trigger pulse to the detector.
A waveform shaping circuit is adopted to respectively carry out shaping transformation on the synchronous voltage and the trigger pulse, and the obtained voltage wave and the pulse wave are signals which can be identified by a detector, so that the detector can identify zero-crossing point time information in the voltage wave and zero-crossing point time information in the pulse wave.
Above-mentioned test fixture owing to adopted aforementioned detector, the same reason can realize being surveyed the automatic detection of the silicon controlled rectifier trigger function of excitation regulator, and the user of being convenient for knows the functional status of being surveyed excitation regulator, avoids the user to use unusual by the excitation regulator of being surveyed of function and reduces the operating stability of generator.
In one embodiment, the waveform shaping circuit includes a voltage shaping circuit connected to the voltage input of the measured excitation regulator and the detector, and a pulse shaping circuit connected to the pulse output of the measured excitation regulator and the detector.
The voltage shaping circuit is used for waveform shaping of the synchronous voltage, and specifically, the voltage shaping circuit can be used for shaping the synchronous voltage in the form of a sine wave into a voltage wave in the form of a square wave. The pulse shaping circuit is used for shaping the trigger pulse into a square-wave pulse wave. By adopting two circuits to respectively carry out shaping processing on the synchronous voltage and the trigger pulse, the processing efficiency is high.
In one embodiment, the detector comprises a field programmable gate array and a single chip microcomputer, and the waveform shaping circuit, the field programmable gate array and the single chip microcomputer are sequentially connected.
The field programmable gate array is used for acquiring voltage waves and pulse waves, reading zero-crossing point time information of the voltage waves and zero-crossing point time information of the pulse waves, and acquiring phase differences of the pulse waves relative to the corresponding voltage waves according to the zero-crossing point time information of the voltage waves and the zero-crossing point time information of the pulse waves to obtain relative phase differences of the pulse waves; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave. The singlechip is used for comparing and processing the relative phase difference of the pulse waves with a preset reference range and generating detection result information corresponding to the trigger pulse.
The field programmable gate array and the single chip microcomputer are adopted for processing respectively, functions are distributed to different devices, and the processing effect is good. Specifically, referring to fig. 7, a test fixture used in one specific embodiment is shown.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of excitation regulator trigger pulse detection, the method comprising:
acquiring a voltage wave of synchronous voltage input to a tested excitation regulator and a pulse wave of a trigger pulse of a controlled silicon corresponding to the synchronous voltage output by the tested excitation regulator;
reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave;
acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and comparing the relative phase difference of the pulse waves with a preset reference range, and generating detection result information corresponding to the trigger pulse.
2. The method according to claim 1, wherein the obtaining a phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain a relative phase difference of the pulse wave comprises:
determining the period of the voltage wave according to the zero-crossing point time information of the voltage wave;
comparing the zero-crossing point time information of the pulse wave with the zero-crossing point time information of the corresponding voltage wave to obtain the same-phase interval time of the pulse wave relative to the corresponding voltage wave;
and calculating the phase difference of the pulse wave relative to the corresponding voltage wave according to the same-phase interval time of the pulse wave relative to the corresponding voltage wave and the period of the corresponding voltage wave, so as to obtain the relative phase difference of the pulse wave.
3. The method according to claim 2, wherein the pulse waves include positive-phase pulse waves and negative-phase pulse waves, the zero-crossing point time information of the positive-phase pulse waves includes pulse rising edge times, and the zero-crossing point time information of the negative-phase pulse waves includes pulse falling edge times; the zero-crossing point time information of the voltage wave comprises a voltage rising edge time and a voltage falling edge time;
the comparing the zero-crossing point time information of the pulse wave with the zero-crossing point time information of the corresponding voltage wave to obtain the same-phase interval time of the pulse wave relative to the corresponding voltage wave includes:
counting the time length from the voltage rising edge moment of the voltage wave corresponding to the normal-phase pulse wave to the pulse rising edge moment of the normal-phase pulse wave to obtain the same-phase interval time of the normal-phase pulse wave relative to the corresponding voltage wave;
and counting the time length from the voltage falling edge moment of the voltage wave corresponding to the negative-phase pulse wave to the pulse falling edge moment of the negative-phase pulse wave to obtain the same-phase interval time of the negative-phase pulse wave relative to the corresponding voltage wave.
4. The method according to claim 2, wherein calculating the phase difference of the pulse wave relative to the corresponding voltage wave according to the same phase interval time of the pulse wave relative to the corresponding voltage wave and the period of the corresponding voltage wave to obtain the relative phase difference of the pulse wave comprises:
calculating the ratio of the same-phase interval time of the pulse wave relative to the corresponding voltage wave to the period of the corresponding voltage wave to obtain the ratio of the pulse wave;
and calculating to obtain the relative phase difference of the pulse waves according to the ratio of the pulse waves and a preset maximum phase, wherein the relative phase difference of the pulse waves is in direct proportion to the ratio of the pulse waves.
5. The method according to any one of claims 1 to 4, wherein the detection result information includes pulse normal information and pulse abnormal information; the comparing process is performed according to the relative phase difference of the pulse wave and a preset reference range, and detection result information corresponding to the trigger pulse is generated, and the method comprises the following steps:
calculating the difference value of the relative phase difference of the pulse waves and a preset deviation phase to obtain a silicon controlled trigger phase shift angle;
if the trigger phase shift angle of the controllable silicon is within a preset reference range, generating pulse normal information;
and if the trigger phase shift angle of the controllable silicon is not in a preset reference range, generating the pulse abnormal information.
6. An excitation regulator trigger pulse detection apparatus, comprising:
the signal acquisition module is used for acquiring a voltage wave of synchronous voltage input to the excitation regulator to be tested and a pulse wave of a trigger pulse of the controllable silicon corresponding to the synchronous voltage output by the excitation regulator to be tested;
the information reading module is used for reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave;
the phase comparison module is used for acquiring the phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain the relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and the comparison detection module is used for performing comparison processing according to the relative phase difference of the pulse waves and a preset reference range and generating detection result information corresponding to the trigger pulse.
7. A detector, a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 1 to 5 when executing the computer program.
8. A test tool comprising a waveform shaping circuit and the detector of claim 7, wherein the waveform shaping circuit is connected with a voltage input end and a pulse output end of an excitation regulator to be tested and is connected with the detector;
the waveform shaping circuit receives the synchronous voltage input to the excitation regulator to be tested and the trigger pulse output by the excitation regulator to be tested to the controlled silicon corresponding to the synchronous voltage, carries out waveform shaping on the synchronous voltage and the trigger pulse, and outputs the voltage wave shaped by the synchronous voltage and the pulse wave shaped by the trigger pulse to the detector.
9. The test tool according to claim 8, wherein the waveform shaping circuit comprises a voltage shaping circuit and a pulse shaping circuit, the voltage shaping circuit is connected with a voltage input end of the excitation regulator to be tested and the detector, and the pulse shaping circuit is connected with a pulse output end of the excitation regulator to be tested and the detector.
10. The test tool according to claim 8 or 9, wherein the detector comprises a field programmable gate array and a single chip microcomputer, and the waveform shaping circuit, the field programmable gate array and the single chip microcomputer are sequentially connected;
the field programmable gate array is used for acquiring the voltage wave and the pulse wave, reading zero-crossing point time information of the voltage wave and zero-crossing point time information of the pulse wave, and acquiring a phase difference of the pulse wave relative to the corresponding voltage wave according to the zero-crossing point time information of the voltage wave and the zero-crossing point time information of the pulse wave to obtain a relative phase difference of the pulse wave; the silicon controlled rectifier corresponding to the pulse wave corresponds to the synchronous voltage corresponding to the corresponding voltage wave;
and the singlechip is used for comparing the relative phase difference of the pulse waves with a preset reference range and generating detection result information corresponding to the trigger pulse.
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| CN101004438A (en) * | 2006-11-09 | 2007-07-25 | 天津理工大学 | Excitation test system based on virtual instrument |
| CN108414932A (en) * | 2018-03-02 | 2018-08-17 | 苏州热工研究院有限公司 | A kind of pilot exciter fault monitoring method and system |
| CN208285237U (en) * | 2018-07-04 | 2018-12-25 | 哈尔滨理工大学 | A kind of automatic voltage regulating device with power factor controlling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101004438A (en) * | 2006-11-09 | 2007-07-25 | 天津理工大学 | Excitation test system based on virtual instrument |
| CN108414932A (en) * | 2018-03-02 | 2018-08-17 | 苏州热工研究院有限公司 | A kind of pilot exciter fault monitoring method and system |
| CN208285237U (en) * | 2018-07-04 | 2018-12-25 | 哈尔滨理工大学 | A kind of automatic voltage regulating device with power factor controlling |
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