JP5369596B2 - Generator dynamic characteristic test equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of test and the accuracy of test of each test item in a start/stop test, a governor test, an indicial response test and an automatic synchronous test. <P>SOLUTION: A generated voltage and an excitation voltage-current of a generator 11 which is a test object, a beat voltage and a battery voltage for driving a prime mover are input respectively into measuring processing parts 12 comprising a generated voltage measuring processing part 12a, a generator rotational speed measuring processing part 12b, a battery voltage measuring processing part 12c, an excitation voltage-current measuring processing part 12d, a frequency measuring processing part 12e of the generator, and a beat voltage measuring processing part 12f. A voltage or the like input into the measuring processing parts 12 is processed there and converted into a recordable signal, and then recorded on a chart of a recording device 14. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a generator dynamic characteristic test apparatus for performing a test consisting of four items of a generator start / stop test, a governor test, a generator initial response test, and an automatic synchronous test.

  The generator dynamic characteristic test is applied to the test of the AC generator driven by the prime mover installed as an emergency power generation facility, and such a test is a periodic inspection based on the Fire Service Act for the emergency power generation facility. It is done because it is obligatory.

  When the dynamic characteristic test of the generator is performed, the rotational speed of the generator is measured and the measurement is performed based on the measured value. The rotational speed of the generator, that is, the rotational speed, is often measured using various sensors such as a tachometer, pulse pickup, photoelectric sensor, and tachometer on the coupling shaft between the prime mover and the generator (patents) Reference 1).

However, since the generators used for emergency power generation facilities are relatively small and medium-sized generators, the sensors as described above are generally not installed. Therefore, in such a generator, since the rotational speed cannot be measured, a dynamic characteristic test of the generator could not be performed.
Japanese Patent Laid-Open No. 03-098499

  When conducting a dynamic characteristic test of a generator, it is necessary to mount the sensor on the generator and to electrically connect the sensor and the test device by wiring, etc. It was a factor that could not be done.

  In addition, it has been difficult to measure related measurement values at the same time when performing each test item in the dynamic characteristics test of a generator. Such measurement is performed by using a timepiece such as a counter or a stopwatch. It was dealt with by the work of repeating the operation again. For this reason, there is no simultaneity in the inspection / test or diagnosis result, which hinders judgment with high measurement accuracy.

  The object of the present invention is made in view of the above circumstances, and by simultaneously measuring and recording analog signal values such as generator voltage and rotational speed and various state change signals, start / stop tests, speed control An object of the present invention is to provide a generator dynamic characteristic test apparatus capable of improving the test efficiency and measurement accuracy of each test item of the machine test, the indicial response test and the automatic synchronous test.

In order to achieve the above object, the invention according to claim 1 is a generator driven by a prime mover, a power generation voltage from the generator, an excitation voltage / excitation current, a beat voltage, and a storage battery for driving the prime mover. A measurement processing unit that inputs voltage and processes it into a recordable signal, a control signal processing unit that processes a generator start command signal, an initial excitation signal, an ON-OFF control signal of a circuit breaker signal into a recordable signal, And a recording device that simultaneously records signals output from the measurement processing unit and the control signal processing unit on a chart.
According to a second aspect of the present invention, the measurement processing unit converts the generator voltage into a DC voltage proportional to an effective value and outputs it to the recording device for recordable signal processing. A processing unit, and a generator tachometer processing unit that converts to a DC voltage proportional to the input frequency (rotational speed) of the generator voltage and outputs the DC voltage to the recording device;
An excitation voltage / current measurement processing unit for converting to a DC voltage proportional to the effective value of the excitation voltage / excitation current and outputting to the recording device, and converting to a DC voltage proportional to an input frequency of the generator voltage A frequency measurement processing unit for outputting to the recording device;
A beat voltage measurement processing unit that converts the input AC voltage of the generator into an attenuated AC voltage and outputs it to the recording device, and inputs the storage battery voltage for starting the prime mover and converts it into a DC voltage proportional to the storage battery voltage And a battery voltage measurement processing unit for outputting to the recording apparatus.

  According to the present invention, when an AC generator dynamic characteristic test is performed, analog signal values such as the generator voltage and rotation speed and various state change signals are simultaneously measured and recorded, so that testing, inspection, diagnosis, etc. Can be measured at once, and the test efficiency and measurement accuracy can be improved.

  Embodiments of the present invention will be described below with reference to the drawings. A generator dynamic characteristic test apparatus according to the present invention includes an analog signal such as a voltage / rotational speed of an AC generator driven by a prime mover (engine), engine start / Automatically pre-process analog signals and status display signals so that they can automatically capture status display signals such as generator initial excitation and voltage establishment, and record these signals as a measurement signal on a single chart all at once. It is a thing.

  Next, the start / stop test, the governor test (load interruption test), the initial response test (sudden load change test) and the automatic synchronization test that are performed as the dynamic characteristic test of the generator will be described.

  FIG. 1 is an explanatory diagram showing a generator start / stop time schedule. Since this generator start / stop test is an important test that is indispensable for determining the quality of power generation equipment, first, FIG. Describes start and stop tests. In this test, analog signals such as rotation speed, power generation voltage, battery (storage battery) voltage, and frequency, and logic signals indicating state transitions are recorded on the same chart, and the start and stop states are evaluated. By comparing with the previous chart, it is possible to grasp the tendency of the generator over time.

  In FIG. 1, the start test uses a start (power outage) command generation as a start signal, and the elapsed time from engine (prime motor) start → cell motor OFF → initial excitation ON → voltage establishment → protection circuit formation → breaker ON will be described later. While displaying digitally on the front panel of the tester, data including analog signals of generator voltage, rotation speed, and storage battery voltage is fetched and subjected to primary processing to generate an input signal to the memory recorder (chart recording device).

  Next, as shown in FIG. 1, the stop test uses a stop command (recovery) as a start signal, and the circuit breaker OFF → engine stop start → engine complete stop → elapsed time until preparation is completed The data is digitally displayed on the panel, and the data including the analog signal of the generator voltage, rotation speed, and storage battery voltage is fetched and subjected to primary processing to generate an input signal to the memory recorder.

  FIG. 2 is an explanatory diagram when performing a governor test (load interruption test). This governor test opens and reopens the circuit breaker during generator load operation, and droops the generator voltage and rotational speed. The rate and response time are confirmed, the circuit breaker signal, generator voltage, and rotation speed are taken in and subjected to primary processing to generate an input signal to the memory recorder.

  FIG. 3 is an explanatory diagram when performing an initial response test (sudden load change test). In this response test, the generator voltage setting is changed suddenly, the responsiveness of the generator voltage is confirmed, and a step signal for setting sudden change is shown. The generator voltage is taken in and subjected to primary processing, and an input signal to the memory recorder is generated.

  FIG. 4 is an explanatory diagram when performing an automatic synchronization test. In this automatic synchronization test, a differential voltage (beat voltage) between a bus voltage and a generated voltage is measured during a generator parallel test, and a circuit breaker is detected by an automatic synchronization signal. This is a test to confirm that is input at a differential voltage of “zero”. The automatic synchronization signal, circuit breaker signal, and beat voltage are captured and subjected to primary processing to generate an input signal to the memory recorder.

  FIG. 5 is a characteristic diagram showing an example of characteristic measurement at start and stop. In FIG. 5, ch1 is a measured value of the generator voltage, ch2 is “F-V output”, and the rotation speed (rotation speed) is shown. The measured value, ch3 is a measured value of the storage battery voltage, and ch4 is a measured value of the frequency.

  FIG. 6 is a block diagram showing the embodiment of the present invention when the above tests are performed. In FIG. 6, reference numeral 11 denotes a generator to be tested. The current and beat voltage and the battery voltage for driving the motor (not shown) are generated by a power generation voltage measurement processing unit 12a, a generator rotation speed measurement processing unit 12b, a battery voltage measurement processing unit 12c, and an excitation voltage / current measurement processing unit 12d. The frequency measurement processing unit 12e and the beat voltage measurement processing unit 12f of the generator are input to the measurement processing unit 12 respectively.

  The generated voltage measurement processing unit 12a converts the input generated voltage into a DC voltage proportional to the effective value of the voltage, and records the analog signal on the chart 14a of the chart recording device 14. The voltage obtained by the measurement processing unit 12a is used in the start test, stop test, governor test, and initial response test of the AC generator 11.

  Further, the generator rotational speed measurement processing unit 12b converts it into a DC voltage proportional to the input frequency (rotational speed) and records the analog signal on the chart 14b of the chart recording device 14. The voltage proportional to the rotation speed obtained by the measurement processing unit 12b is used in the start test and the stop test.

  Furthermore, the frequency measurement processing unit 12e converts the analog signal into a DC voltage proportional to the input frequency and records the analog signal on the chart 14e of the chart recording device 14. The voltage proportional to the frequency obtained by the measurement processing unit 12e is used at the time of the start / stop test, the governor test, and the initial response test.

  12c is a battery voltage measurement processing unit to which a battery voltage for a prime mover (not shown) for driving the generator 11 is supplied. The analog signal is converted and recorded on the chart 14 c of the chart recording device 14. The voltage obtained by the measurement processing unit 12c is used in the start / stop test.

  12d is an excitation voltage / excitation current measurement processing unit of the generator 11. This measurement processing unit 12d converts the analog signal into a DC voltage proportional to the effective value of the input AC voltage / current, and the chart recording device 14 Is recorded on the chart 14d. The voltage obtained by the measurement processing unit 12d is used in the start / stop test and the initial response test.

  12f is a beat voltage measurement processing unit, which attenuates the input AC voltage, converts it into an AC voltage output, and records the analog signal on the chart 14f of the chart recording device 14. The output obtained by the measurement processing unit 12f is used during an automatic synchronization test.

  Reference numeral 13 denotes a control signal processing unit, which detects the ON / OFF state of each control signal (for example, generator start command signal, initial excitation signal, circuit breaker signal, etc.) and changes its ON / OFF state. Is recorded on the chart 14g. Each control signal from the processing unit 13 is used for each test.

  Table 1 shows the correspondence between each test item, measurement item (input signal), and input method of the generator start / stop test, governor test, indicial response test, and automatic synchronization test.

  In Table 1, the start test a of the test item is No. No. 6 1-No. 13 and the test item stop test b is No. 1-No. 5 and No. 13, 14, 17, 19-21. Further, the governor test c of the test item is No. Three tests 1, 5 and 13 are performed. Similarly, in the initial response test d and the automatic synchronization test e, tests indicated by “●” are performed in the column of measurement items by test in Table 1.

  FIG. 7 is a plan view showing a panel image of the generator dynamic characteristic tester. In FIG. 7, TS is a test selection switch unit, and this selection switch unit TS is a selection switch TS1 which is operated when performing a start test. A selection switch TS2 for performing a stop test, a selection switch TS3 for performing a speed governor test, a selection switch TS4 for performing an initial response test, and a selection switch TS5 for performing an automatic synchronous test. The

  CTD is counter display unit, LGI is logic input unit, LGO is logic output unit, ALI is analog input unit, ALO is analog output unit, PW is power supply unit, POM is VT-CT input unit for power measurement, logic output unit The LGO and the analog output unit ALO are connected to the chart recording device 13 shown in FIG.

  In the above, it has been stated that the generator used in the emergency power generation facility cannot measure the rotational speed and therefore cannot perform the dynamic characteristic test of the generator. Since the rotation speed can be measured, a dynamic characteristic test of the generator can be performed.

Explanatory diagram showing the generator start / stop time schedule Explanatory drawing when performing a governor test (load interruption test). Explanatory drawing when performing an indirect response test (sudden load change test). Explanatory drawing when performing an automatic synchronous test. The characteristic view which shows the example of a characteristic measurement at the time of a start and a stop. The block block diagram which shows embodiment of this invention. The top view which shows the panel image of a generator dynamic characteristic tester.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Generator 12 ... Measurement processing part 13 ... Control signal processing part 14 ... Chart recording apparatus

Claims (2)

A generator driven by a prime mover , and a measurement processing unit that inputs a generated voltage, excitation voltage / excitation current, beat voltage from the generator , and a storage battery voltage for driving the prime mover into a recordable signal; and
A control signal processing unit that processes a generator start command signal, an initial excitation signal, and an ON-OFF control signal of a circuit breaker signal into a recordable signal;
A generator dynamic characteristic test apparatus comprising: a recording device that simultaneously records signals output from the measurement processing unit and the control signal processing unit on a chart. The measurement processing unit, for recordable signal processing,
A power generation voltage measurement processing unit that converts the generator voltage into a DC voltage proportional to an effective value and outputs the DC voltage to the recording device;
A generator tachometer processing unit that converts the output voltage to a DC voltage proportional to the input frequency (rotation speed) of the generator voltage and outputs the DC voltage to the recording device;
An excitation voltage / current measurement processing unit that converts the excitation voltage / excitation current into a DC voltage proportional to the effective value of the excitation current and outputs the DC voltage to the recording device;
A frequency measurement processing unit for converting to a DC voltage proportional to the input frequency of the generator voltage and outputting it to the recording device;
Beat voltage measurement processing unit that converts the input AC voltage of the generator into an attenuated AC voltage and outputs the AC voltage to the recording device, and
A battery voltage measurement processing unit that inputs the storage battery voltage for starting the prime mover, converts the storage battery voltage into a direct current voltage proportional to the storage battery voltage, and outputs the DC voltage to the recording device;
2. The generator dynamic characteristic test apparatus according to claim 1, characterized by comprising:

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