WO2014125595A1 - サイリスタ起動装置およびその制御方法 - Google Patents
サイリスタ起動装置およびその制御方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 9
- 230000005856 abnormality Effects 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000001360 synchronised effect Effects 0.000 claims abstract description 25
- 239000007858 starting material Substances 0.000 claims description 24
- 230000002159 abnormal effect Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000004913 activation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/022—Security devices, e.g. correct phase sequencing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M5/4505—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M5/452—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
- H02P1/52—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by progressive increase of frequency of supply to motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
- H02P2201/13—DC-link of current link type, e.g. typically for thyristor bridges, having an inductor in series with rectifier
Definitions
- the present invention relates to a thyristor starting device, and more specifically to a technique for detecting an abnormal gate pulse generated in the thyristor starting device.
- the thyristor starter is a converter that converts three-phase AC power into DC power, a DC reactor that smoothes the DC current, and DC power that is supplied from the converter via the DC reactor to three-phase AC power of a desired frequency. And an inverter for conversion and feeding to the synchronous machine.
- the thyristor starting device is output from an AC current detector that detects a three-phase AC current input to a converter and an inverter, as disclosed in, for example, Japanese Patent Application Laid-Open No. Sho 62-262670 (Patent Document 1).
- An AC voltage detector that detects a three-phase AC voltage, and a control circuit that controls the converter and the inverter based on the detection results of the AC current detector and the AC voltage detector.
- the control circuit In such a thyristor starter, the control circuit generates a gate pulse to be applied to the gates of a plurality of thyristors included in the converter and the inverter. A plurality of thyristors are turned on at a predetermined timing in response to the gate pulse, whereby a desired power conversion operation is performed in the converter and the inverter. Therefore, when an abnormality of the gate pulse occurs, the thyristor is not normally switched, so that an abnormal current flows through the converter and the inverter and may be damaged. In order to prevent such a problem, it is necessary to monitor the gate pulse output from the gate pulse generation circuit and quickly detect the abnormality.
- a main object of the present invention is to provide a thyristor starter capable of detecting a gate pulse abnormality with a small and simple configuration and a control method thereof.
- a thyristor starter is provided via a DC reactor from a converter that converts AC power supplied from an AC power source into DC power, a DC reactor that smoothes DC current, and the converter.
- An inverter that converts the DC power converted into AC power and supplies it to the synchronous machine, a gate pulse generation circuit that generates a gate pulse to be applied to the converter and the thyristor of the inverter, and a DC current flowing through the DC reactor becomes a current command value
- the control unit that sets the phase control angle of the gate pulse applied to the thyristor of the converter is compared with the detected value of the DC current and the current command value, and the gate pulse abnormality is determined based on the comparison result.
- an abnormality detection unit for determining.
- a control method for a thyristor starter wherein the thyristor starter includes a converter that converts AC power supplied from an AC power source into DC power, and a DC reactor that smoothes the DC current. And an inverter that converts the DC power supplied from the converter through the DC reactor to AC power and supplies the AC power to the synchronous machine, and a gate pulse generation circuit that generates a gate pulse applied to the converter and the thyristor of the inverter.
- the control method of the thyristor starter includes a step of setting a phase control angle of a gate pulse applied to the converter thyristor by controlling the current of the converter so that a direct current flowing through the direct current reactor becomes a current command value, Comparing the detected value with the current command value and determining an abnormality of the gate pulse based on the comparison result.
- the abnormality of the gate pulse can be detected with a small and simple configuration.
- FIG. 1 It is a figure which shows the structure of the thyristor starting device which concerns on embodiment of this invention. It is a block diagram which shows the control structure of the converter control part in FIG. It is a figure explaining the abnormality determination in an abnormality detection part. It is the figure which illustrated the waveform of the direct current at the time of the energization start of a thyristor starting device. It is a figure which shows the structure of the thyristor starting device of a comparative example.
- FIG. 1 is a diagram showing a configuration of a thyristor starter according to an embodiment of the present invention.
- thyristor starter 100 receives three-phase AC power from AC power supply e1 and starts synchronous machine 4.
- the thyristor starter 100 includes a power conversion unit 10, an AC current detector 8, an AC voltage detector 9, a converter control unit 20, an inverter control unit 30, and a gate pulse generation circuit 40.
- the thyristor activation device 100 further includes an alternating current detector 8 and an alternating voltage detector 9.
- the power conversion unit 10 receives three-phase AC power from the AC power source e1 via the three-phase line LN1.
- AC current detector 8 detects a three-phase AC current supplied to power conversion unit 10 and outputs detected current values I 1, I 2, and I 3 to converter control unit 20.
- the power conversion unit 10 includes a converter 1, an inverter 2, and a DC reactor 3.
- Converter 1 converts three-phase AC power from AC power supply e1 into DC power.
- Converter 1 is a three-phase full-wave rectifier circuit including at least six thyristors. Each thyristor receives a gate pulse from the converter control unit 20 at its gate. By turning on the six thyristors at a predetermined timing, the three-phase AC power can be converted into DC power.
- the direct current reactor 3 is connected between the high voltage side output terminal 1a of the converter 1 and the high voltage side input terminal 2a of the inverter 2, and smoothes the direct current.
- the low voltage side output terminal 1b of the converter 1 and the low voltage side input terminal 2b of the inverter 2 are directly connected.
- the inverter 2 converts the DC power supplied from the converter 1 through the DC reactor 3 into three-phase AC power having a desired frequency.
- the inverter 2 includes at least six thyristors. Each thyristor receives a gate pulse from the inverter control unit 30 at its gate. By turning on the six thyristors at a predetermined timing, it is possible to convert DC power into three-phase AC power having a predetermined frequency.
- the three-phase AC power generated by the inverter 2 is given to the synchronous machine 4 through the three-phase line LN2.
- the normal rotation speed is 3000 rpm to 3600 rpm.
- the synchronous machine 4 includes a three-phase coil. Each of the three-phase coils is connected to a three-phase line LN2. When three-phase AC power is supplied to the three-phase coil, a rotating magnetic field is generated and the synchronous machine 4 rotates.
- the AC voltage detector 9 detects a three-phase AC voltage supplied to the three-phase coil of the synchronous machine 4 and outputs the voltage detection values V1, V2, and V3 to the inverter control unit 30.
- Converter control unit 20 controls converter 1 based on current detection values I1, I2, and I3 received from AC current detector 8. Specifically, converter control unit 20 controls current of converter 1 so that the direct current output from converter 1 matches a predetermined current command value Id *. Converter control unit 20 calculates phase control angle (ignition angle) ⁇ based on detected current values I 1, I 2, I 3 by a method described later, and outputs the calculated phase control angle ⁇ to gate pulse generation circuit 40. . Gate pulse generation circuit 40 generates a gate pulse to be applied to the gate of the thyristor of converter 1 based on phase control angle ⁇ received from converter control unit 20.
- the inverter control unit 30 controls the inverter 2 based on the voltage detection values V1, V2, V3 received from the AC voltage detector 9.
- Inverter control unit 30 includes a rotor position detection unit (not shown).
- the rotor position detection unit detects the rotation position of the rotor of the synchronous machine 4 based on the voltage detection values V1, V2, V3 received from the AC voltage detector 9.
- the inverter control unit 30 calculates a phase control angle (ignition angle) ⁇ based on the detected rotational position of the rotor, and outputs the calculated phase control angle ⁇ to the gate pulse generation circuit 40.
- Gate pulse generating circuit 40 generates a gate pulse to be applied to the gate of the thyristor of inverter 2 based on phase control angle ⁇ received from inverter control unit 30.
- Such a thyristor starting device is used, for example, at a power plant to start a synchronous generator in a stopped state as a synchronous motor. While the synchronous generator is driven to rotate at a predetermined rotational speed as a synchronous motor, the thyristor starter is disconnected from the synchronous generator and the synchronous generator is rotated by a gas turbine or the like to generate AC power.
- Converter control unit 20 includes an abnormality detection unit 50.
- Abnormality detection unit 50 detects an abnormality of the gate pulse supplied from converter 40 and inverter 2 from gate pulse generation circuit 40. When detecting an abnormality in the gate pulse, abnormality detection unit 50 stops the operation of converter 1 and outputs alarm signal ALM to inverter control unit 30. When receiving the abnormality detection signal ALM, the inverter control unit 30 stops the operation of the inverter 2.
- FIG. 2 is a block diagram showing a control structure of converter control unit 20 in FIG.
- converter control unit 20 includes a current control unit 22 for controlling current of converter 1 and an abnormality detection unit 50.
- Current control unit 22 includes rectifier circuit 200, gain multiplication unit 210, subtraction unit 220, PI calculation unit 230, and calculation unit 240.
- the rectifier circuit 200 receives the current detection values I1, I2, and I3 from the AC current detector 8.
- the rectifier circuit 200 uses a full-wave rectifier type diode rectifier, and converts the current detection values I1, I2, and I3 into a direct current Id.
- the gain multiplication unit 210 multiplies the direct current Id from the rectifier circuit 200 by the gain K and outputs the result to the subtraction unit 220.
- a value obtained by multiplying the direct current Id by the gain K is proportional to the direct current flowing through the direct current reactor 3.
- the subtraction unit 220 calculates a current deviation ⁇ Id between the current command value Id * and the direct current K ⁇ Id, and outputs it to the PI calculation unit 230.
- the current command value Id * is a target value of the direct current, and is a control command set according to the operating state of the synchronous machine 4.
- the PI calculation unit 230 generates a PI output corresponding to the current deviation ⁇ Id according to a predetermined proportional gain and integral gain.
- the PI calculation unit 230 includes a proportional element (P), an integral element (I), and an adder.
- the proportional element multiplies the current deviation ⁇ Id by a predetermined proportional gain and outputs the result to the adder, and the integral element integrates the current deviation ⁇ Id with a predetermined integral gain and outputs the result to the adder.
- the adder adds the outputs from the proportional element and the integral element to generate a PI output. This PI output corresponds to a control command that defines the voltage value of the DC power that the converter 1 should output.
- the computing unit 240 calculates the phase control angle ⁇ using the PI output given from the PI computing unit 230.
- the average value E d [alpha] of the DC voltage outputted from the converter 1 is given ignoring the overlap angle by the following formula (1).
- E d ⁇ 1.35E s cos ⁇ ⁇ ( 1)
- the computing unit 240 calculates the phase control angle ⁇ by putting the PI output given from the PI computing unit 230 into E d ⁇ of the equation (1) and solving it.
- the calculation unit 240 outputs the calculated phase control angle ⁇ to the gate pulse generation circuit 40.
- the gate pulse generation circuit 40 generates a gate pulse to be given to each thyristor of the converter 1 based on the phase control angle ⁇ .
- the converter 1 is subjected to switching control in accordance with the gate pulse generated by the gate pulse generation circuit 40, whereby a direct current according to the current command value Id * is output from the converter 1.
- a feedback control system for making the direct current coincide with the current command value Id * is configured.
- the inverter control unit 30 when receiving the alarm signal ALM from the abnormality detection unit 50, the inverter control unit 30 forcibly stops the operation of the inverter 2 by turning off each thyristor of the inverter 2. At this time, the converter control unit 20 also forcibly stops the operation of the converter 1 by turning off each thyristor of the converter 1.
- the abnormality detection unit 50 determines the abnormality of the gate pulse by monitoring the feedback current for current control in the feedback control system of the current control unit 20 described above. Specifically, the three-phase alternating current detected by the alternating current detector 8 is converted into the direct current Id by the rectifier circuit 200 and then given to the abnormality detection unit 50 as a feedback current. When an abnormality occurs in switching in the converter 1 or the inverter 2, the detected value of the direct current Id that is a feedback current deviates from the current command value Id * and varies greatly. The abnormality detection unit 50 compares the detected value of the direct current Id given from the current control unit 22 with the current command value Id *, and determines the abnormality of the gate pulse based on the comparison result.
- the abnormality detecting unit 50 includes an adding unit 500, a subtracting unit 510, comparators 520 and 530, an OR circuit (OR circuit) 540, and a timer 550.
- Abnormality detection unit 50 further includes a determination unit 560, a timer 570, a logical product circuit (AND circuit) 580, and a counter 590.
- the abnormality detection unit 50 sets the allowable range of the feedback current Id using the addition unit 500 and the subtraction unit 510.
- the allowable range of the feedback current Id is set to have an allowable width dI on the high current side and the low current side with respect to the current command value Id *.
- the addition unit 500 sets the upper limit value (allowable upper limit value) of the allowable range by adding the current command value Id * and the allowable width dI.
- the subtraction unit 510 subtracts the allowable width dI from the current command value Id * to set a lower limit value (allowable lower limit value) of the allowable range.
- the comparator 520 compares the direct current (feedback current) Id given from the rectifier circuit 200 with the allowable upper limit value, and outputs a signal representing the comparison result. Comparator 520 outputs a signal that becomes an H (logic high) level when DC current Id exceeds the allowable upper limit.
- the comparator 530 compares the direct current (feedback current) Id given from the rectifier circuit 200 with the allowable lower limit value, and outputs a signal representing the comparison result. Comparator 530 outputs a signal that becomes H level when DC current Id falls below the allowable lower limit value.
- OR circuit 540 outputs the logical sum of the output signal of comparator 520 and the output signal of comparator 530 to timer 550. That is, when the DC current Id exceeds the allowable upper limit value, or when the DC current Id falls below the allowable lower limit value, the OR circuit 540 outputs an H level signal.
- Timer 550 measures the time during which the output signal of OR circuit 540 is at the H level. The count value of the timer 550 is reset when the output signal of the OR circuit 540 is switched from H level to L level. When the measured time reaches a predetermined time, timer 550 outputs an H level signal received from logical sum circuit 540 to logical product circuit 580.
- a gate pulse abnormality when a gate pulse abnormality occurs, a phenomenon occurs in which the direct current Id exceeds the allowable upper limit as indicated by k2 in the figure. Alternatively, a phenomenon occurs in which the direct current Id falls below the allowable lower limit value.
- the abnormality detection unit 50 monitors the DC current Id and determines that the gate pulse is abnormal when these phenomena are detected.
- the abnormality detection unit 50 measures the time when the DC current Id is out of the allowable range using the timer 550, and determines that the gate pulse is abnormal when the measured time reaches a predetermined time.
- the abnormality detection unit 50 uses a determination unit 560 and a timer 570 to prevent such an overshoot of the direct current Id from being erroneously determined as an abnormality of the gate pulse. (Corresponding to time Tst), the abnormality determination is invalidated.
- the determination unit 560 determines whether or not an activation command for the thyristor activation device 100 is given from a central control device (not shown). This is because the current command value Id * usually suddenly changes from zero when energization of the thyristor starter 100 is started.
- the thyristor starter 100 accelerates the rotation of the synchronous machine 4 by supplying AC power to the synchronous machine 4 based on the AC power supplied from the AC power supply e1.
- the timer 570 measures the elapsed time from the time when the start command of the thyristor starter 100 is received. When the measured time reaches a certain time Tst in FIG. 3, timer 570 outputs a signal activated to H level to AND circuit 580.
- the AND circuit 580 is activated after a predetermined time Tst has elapsed from the start of energization of the thyristor starter 100, and outputs a signal that becomes H level when it is determined that the gate pulse is abnormal. Output.
- the counter 590 is used for measuring the number of times that the gate pulse is determined to be abnormal. When it is determined that the gate pulse is abnormal by the abnormality determination described above, 1 is added to the count value. The counter 590 determines whether or not the count value has reached the determination value CNTth. When the count value reaches the determination value CNTth, the counter 590 determines that the gate pulse is abnormal and outputs an alarm signal ALM. .
- the abnormality detection unit 50 determines the determination result that the gate pulse is abnormal when the number of times that the gate pulse is determined to be abnormal reaches the determination value CNTth. Thereby, it can be prevented that the gate pulse is erroneously determined to be abnormal due to an accidental factor. As a result, highly reliable abnormality detection can be performed.
- the determination result that the gate pulse is abnormal is determined when the number of times that the gate pulse is determined to be abnormal exceeds the determination value CNTth.
- the gate pulse is abnormal. It is good also as a structure which determines the determination result made into abnormality only when the determination to the effect is made continuously.
- the thyristor starter is configured to determine the abnormality of the gate pulse based on the feedback current used for the current control of the converter 1, as shown in FIG. There is no need to provide a circuit (corresponding to the abnormality detection unit 60) for monitoring the gate pulse itself in the thyristor starter 1000. As a result, the thyristor starter can be reduced in size and price.
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Abstract
Description
図1を参照して、サイリスタ起動装置100は、交流電源e1から三相交流電力を受けて同期機4を起動させる。サイリスタ起動装置100は、電力変換部10と、交流電流検出器8と、交流電圧検出器9と、コンバータ制御部20と、インバータ制御部30と、ゲートパルス発生回路40とを備える。サイリスタ起動装置100は、交流電流検出器8と、交流電圧検出器9とをさらに備える。
図2を参照して、コンバータ制御部20は、コンバータ1を電流制御するための電流制御部22と、異常検出部50とを含む。電流制御部22は、整流回路200と、ゲイン乗算部210と、減算部220と、PI演算部230と、演算部240とを含む。
演算部240は、この式(1)のEdαにPI演算部230から与えられるPI出力を入れて解くことにより、位相制御角αを算出する。演算部240は、算出した位相制御角αをゲートパルス発生回路40へ出力する。
図3を参照して、電流制御部22の整流回路200から与えられる直流電流Idについては、上述のように、許容上限値Id*+dIおよび許容下限値Id*-dIが設定されている。ゲートパルスが正常である場合には、図中のk1に示すように、直流電流Idは、許容上限値および許容下限値の間に収まっている。
Claims (4)
- 交流電源から供給される交流電力を直流電力に変換するコンバータと、
直流電流を平滑化させる直流リアクトルと、
前記コンバータから前記直流リアクトルを介して与えられた直流電力を交流電力に変換して同期機に供給するインバータと、
前記コンバータおよび前記インバータのサイリスタに与えるゲートパルスを生成するゲートパルス生成回路と、
前記直流リアクトルに流れる直流電流が電流指令値となるように前記コンバータを電流制御することにより、前記コンバータのサイリスタに与えるゲートパルスの位相制御角を設定する制御部と、
前記直流電流の検出値と前記電流指令値とを比較し、比較結果に基づいて前記ゲートパルスの異常を判定する異常検出部とを備える、サイリスタ起動装置。 - 前記交流電源から供給される交流電流を検出する交流電流検出器と、
前記交流電流検出器の出力を整流する整流回路とをさらに備え、
前記制御部は、前記電流指令値と前記整流回路から出力される直流電流との偏差に基づいて前記直流電流をフィードバック制御するように構成され、
前記異常検出部は、前記整流回路から出力される直流電流と前記電流指令値とを比較し、比較結果に基づいて前記ゲートパルスの異常を判定する、請求項1に記載のサイリスタ起動装置。 - 前記異常検出部は、前記電流指令値に対して高電流側および低電流側に許容範囲の上限値および下限値をそれぞれ設定し、前記直流リアクトルに流れる直流電流が前記許容範囲から外れた場合に前記ゲートパルスの異常と判定する、請求項1または2に記載のサイリスタ起動装置。
- サイリスタ起動装置の制御方法であって、
前記サイリスタ起動装置は、
交流電源から供給される交流電力を直流電力に変換するコンバータと、
直流電流を平滑化させる直流リアクトルと、
前記コンバータから前記直流リアクトルを介して与えられた直流電力を交流電力に変換して同期機に供給するインバータと、
前記コンバータおよび前記インバータのサイリスタに与えるゲートパルスを生成するゲートパルス生成回路とを含み、
前記制御方法は、
前記直流リアクトルに流れる直流電流が電流指令値となるように前記コンバータを電流制御することにより、前記コンバータのサイリスタに与えるゲートパルスの位相制御角を設定するステップと、
前記直流電流の検出値と前記電流指令値とを比較し、比較結果に基づいて前記ゲートパルスの異常を判定するステップとを備える、サイリスタ起動装置の制御方法。
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JP2015500042A JP6075901B2 (ja) | 2013-02-14 | 2013-02-14 | サイリスタ起動装置およびその制御方法 |
US14/765,420 US9912259B2 (en) | 2013-02-14 | 2013-02-14 | Thyristor starting device and control method therefor |
EP13875275.3A EP2958224B1 (en) | 2013-02-14 | 2013-02-14 | Thyristor startup device and method for controlling same |
PCT/JP2013/053510 WO2014125595A1 (ja) | 2013-02-14 | 2013-02-14 | サイリスタ起動装置およびその制御方法 |
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US10931113B2 (en) * | 2016-03-15 | 2021-02-23 | Mitsubishi Electric Corporation | Power conversion device and power system performing protection control for suppressing received power |
US11211882B2 (en) * | 2017-06-21 | 2021-12-28 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Thyristor starter |
CN110771028B (zh) * | 2017-06-21 | 2023-05-23 | 东芝三菱电机产业系统株式会社 | 晶闸管起动装置 |
JP6964793B2 (ja) * | 2018-09-28 | 2021-11-10 | 三菱電機株式会社 | モータ駆動装置、送風機、圧縮機及び空気調和機 |
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EP2958224A1 (en) | 2015-12-23 |
US20150365020A1 (en) | 2015-12-17 |
US9912259B2 (en) | 2018-03-06 |
JP6075901B2 (ja) | 2017-02-08 |
EP2958224B1 (en) | 2018-07-04 |
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