JP2797937B2 - Inverter control device - Google Patents
Inverter control deviceInfo
- Publication number
- JP2797937B2 JP2797937B2 JP5313335A JP31333593A JP2797937B2 JP 2797937 B2 JP2797937 B2 JP 2797937B2 JP 5313335 A JP5313335 A JP 5313335A JP 31333593 A JP31333593 A JP 31333593A JP 2797937 B2 JP2797937 B2 JP 2797937B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- commutation failure
- control signal
- control
- switching element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Inverter Devices (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、電力システムにおけ
る交直変換装置の制御装置に関し、特に交流系統事故に
より交流電圧が低下した場合にも、最大限の交流電力を
送電可能とする逆変換器の制御装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an AC / DC converter in a power system, and more particularly to a control device for an inverter which can transmit the maximum AC power even when the AC voltage is reduced due to an AC system accident. The present invention relates to a control device.
【0002】[0002]
【従来の技術】一般に、変換器を逆変換器として運転す
る場合、その制御角αは、90°<180°の範囲で運
転される。一方、直流系統電力を変換して交流系統に給
電する逆変換器にあっては、高力率の運転が望まれるた
め、制御角αを180°近傍で運転させたいが、180
°に近付けると転流余裕角が確保できず、転流失敗を誘
発する。逆に90°に近付ける交流系統への送電ができ
なくなってしまう。従って、この種の逆変換器にあって
は転流余裕角をつねに必要最小限に維持しつつ、180
°近傍で運転している。2. Description of the Related Art Generally, when a converter is operated as an inverse converter, the control angle α is operated in a range of 90 ° <180 °. On the other hand, in the inverter which converts the DC system power and feeds it to the AC system, it is desired to operate the control angle α near 180 ° because high power factor operation is desired.
When approaching °, a commutation margin angle cannot be secured, and commutation failure is induced. Conversely, power cannot be transmitted to the AC system approaching 90 °. Therefore, in this type of inverter, the commutation allowance angle is always kept to the minimum necessary,
° Driving near.
【0003】図2は、この種逆変換装置の主回路図と制
御装置ブロック図であり、図2において、1は交流電圧
に同期した点弧パルスによりオンオフ制御されれ順次転
流が行なわれ、直流電圧を交流電圧に変換するインバー
タ回路を構成する他励式スイッチング素子、2はスイッ
チング素子1の交流出力を変成する変圧器、3は直流リ
アクトル、4は交流系統の電圧を検出する交流変成器、
5は交流系統の電流を検出する交流変換器、6は直流系
統の電流を検出する直流変換器、7は直流系統の電圧を
検出する直流変成器、8は直流変成器6、及び交流変成
器5の出力を比較することによりスイッチング素子の転
流失敗を検出する転流失敗検出手段である。FIG. 2 is a main circuit diagram and a control device block diagram of this type of inverting device. In FIG. 2, reference numeral 1 denotes an on / off control by a firing pulse synchronized with an AC voltage to sequentially perform commutation. A separately-excited switching element constituting an inverter circuit for converting a DC voltage to an AC voltage, a transformer for transforming the AC output of the switching element 1, a DC reactor 3, an AC transformer for detecting the voltage of the AC system,
5 is an AC converter for detecting the current of the AC system, 6 is a DC converter for detecting the current of the DC system, 7 is a DC transformer for detecting the voltage of the DC system, 8 is a DC transformer 6, and an AC transformer. 5 is a commutation failure detection means for detecting a commutation failure of the switching element by comparing the outputs of the switching elements 5 and 5.
【0004】10は直流変成器6、及び交流変成器4の
出力を導入し、これらの出力から所定の演算を実行し、
スイッチング素子を転流失敗させない所定の余裕角を保
持する点弧位相角を演算する転流失敗防止制御手段、1
1は直流変成器7の検出する直流電圧を導入し、設定電
圧と比較することにより、直流系統電圧を設定電圧とす
る点弧位相角に応じた位相制御信号を導出する定電圧制
御手段、12は入力する位相制御信号の内、進み側の位
相制御信号を選択して出力する制御選択手段、13はこ
の制御選択手段の出力する位相制御手段信号に基づい
て、スイッチング素子1を点弧するパルスを発生する点
弧パルス発生手段、14は交流変成器4の検出する交流
電圧を入力し、交流系統の電圧低下を検出する交流電圧
低下検出手段、15は位相進め戻し手段であり、例え
ば、特公昭51−67918号公報に記載された転流失
敗検出手段8により転流失敗が検出された場合に、制御
選択手段12に出力する位相制御信号を進み側の所定位
相角に対応した位相制御信号とし、交流電圧低下検出手
段14により交流電圧が所定レベル以上に回復したこと
を検出すると、所定の時定数で遅れ方向へ戻す手段であ
る。[0004] Reference numeral 10 introduces the outputs of the DC transformer 6 and the AC transformer 4 and executes a predetermined operation from these outputs.
Commutation failure prevention control means for calculating a firing phase angle that maintains a predetermined margin angle for preventing commutation failure of the switching element;
1 is a constant voltage control means for introducing a DC voltage detected by the DC transformer 7 and comparing it with a set voltage to derive a phase control signal corresponding to a firing phase angle with the DC system voltage as a set voltage; Is a control selection means for selecting and outputting the leading phase control signal from the input phase control signals, and 13 is a pulse for firing the switching element 1 based on the phase control means signal output from the control selection means. Is an AC voltage detected by the AC transformer 4, an AC voltage drop detecting means for detecting a voltage drop in the AC system, and 15 is a phase advance / return means. When a commutation failure is detected by the commutation failure detection means 8 described in JP-B-51-67918, the phase control signal output to the control selection means 12 is changed to a phase control signal corresponding to a predetermined phase angle on the leading side. And the signal, when an AC voltage by the AC voltage detection means 14 detects that the recovered above a predetermined level, a means for returning the direction delayed by a predetermined time constant.
【0005】また、上記転流失敗防止制御手段10は、
例えば、「直流送電技術解説」1978年電気学会発
行,P83〜P85に記載されているように、直流変成
器6、及び交流変成器4の検出する直流電流、及び交流
電圧から、次式の関係を保つ点弧位相角を算出し、応じ
た位相制御信号を制御選択手段12に出力する。 cosγ−cos(180°−α)=(√2・Xi・Id)/Ei…(1) ここで、γは、余裕角 αは、点弧位相角 Xiは、転流リアクタンス Idは、直流電流 Eiは、交流電圧である。 即ち、γとXiを定数とし、交流電圧Eiと直流電流I
dとの関係が上記1式を満足する時点の位相制御信号を
制御選択手段12に出力する。[0005] The commutation failure prevention control means 10 comprises:
For example, as described in “DC Power Transmission Technology”, published by the Institute of Electrical Engineers of Japan in 1978, pp. 83-85, the following equation is obtained from the DC current and the AC voltage detected by the DC transformer 6 and the AC transformer 4. Is calculated, and a corresponding phase control signal is output to the control selecting means 12. cosγ-cos (180 ° −α) = (√2 · Xi · Id) / Ei (1) where γ is a margin angle α is a firing phase angle Xi is a commutation reactance Id is a DC current Ei is an AC voltage. That is, γ and Xi are constants, and the AC voltage Ei and the DC current I
The phase control signal at the time when the relationship with d satisfies the above equation (1) is output to the control selecting means 12.
【0006】次に動作について説明する。制御選択手段
12は、位相進め戻し手段15、転流失敗防止制御手段
10、又は定電圧制御手段11の出力する位相制御信号
の内、最も進み側の点弧位相角の位相制御信号を選択
し、点弧パルス発生手段13に出力する。点弧パルス発
生手段13では、制御選択手段12から入力した位相制
御信号に基づいたタイミングで点弧パルスを発生し、ス
イッチング素子1を点弧制御する。Next, the operation will be described. The control selection means 12 selects the phase control signal of the most advanced ignition phase angle from the phase control signals output from the phase advance / return means 15, the commutation failure prevention control means 10, or the constant voltage control means 11. , To the ignition pulse generating means 13. The firing pulse generating means 13 generates a firing pulse at a timing based on the phase control signal input from the control selecting means 12, and controls the switching element 1 to fire.
【0007】位相進め戻し手段15、転流失敗防止制御
手段10、及び定電圧制御手段11は、上述した制御動
作により位相制御信号を出力するが、定常状態にあって
は、図3に示す交流電圧低下時以前の状態のように定電
圧制御手段11の出力する位相制御信号3が最も進み側
の点弧位相角の位相制御信号であり、制御選択手段は、
定電圧制御手段11の位相制御信号を選択して点弧パル
ス発生手段13に出力している。ここで、図3の従来例
では、定常状態時、定電圧制御手段11の出力する位相
制御信号は、135°となっている。The phase advance / return means 15, the commutation failure prevention control means 10, and the constant voltage control means 11 output a phase control signal by the above-described control operation. As in the state before the voltage drop, the phase control signal 3 output from the constant voltage control means 11 is a phase control signal of the ignition phase angle on the most advanced side, and the control selection means includes:
The phase control signal of the constant voltage controller 11 is selected and output to the firing pulse generator 13. Here, in the conventional example of FIG. 3, in a steady state, the phase control signal output from the constant voltage control means 11 is 135 °.
【0008】一方、定常状態時であって、交流系統側の
電圧が緩やかに変動するような場合は、転流失敗防止制
御手段10により交流変換器4の検出する交流電圧Ei
と直流変成器6の検出する直流電流Idとの関係が上記
1式を満足する位相制御信号をするため、転流失敗防止
制御手段10の出力する位相制御信号が定電圧制御手段
11の出力する位相制御信号により進み側の位相制御信
号となり、制御選択手段12は転流失敗防止制御手段1
0の出力する位相制御信号を選択して点弧パルス発生手
段13へ出力することになる。On the other hand, in the steady state, when the voltage on the AC system side fluctuates slowly, the AC voltage Ei detected by the AC converter 4 by the commutation failure prevention control means 10 is controlled.
The phase control signal output from the commutation failure prevention control means 10 is output from the constant voltage control means 11 because the relation between the DC current Id detected by the DC transformer 6 and the DC current Id satisfies the above equation (1). The phase control signal becomes the leading phase control signal, and the control selecting means 12 controls the commutation failure prevention control means 1
The phase control signal output as 0 is selected and output to the firing pulse generating means 13.
【0009】今、図3に示すように、交流系統に事故が
発生し、交流電圧が急激に低下したとする。ここで、交
流系統の事故は、例えば、地絡事故であり、交流系統の
保護装置により、事故発生後、交流の4サイクル程度で
復旧するものとする。交流電圧が急激に低下すると、転
流失敗防止制御手段10が動作し、1式に基づいて点弧
位相角を進めようとするが、図3の特性曲線2に示すよ
うに制御応答が遅く、転流失敗を誘発することになる。Now, as shown in FIG. 3, it is assumed that an accident has occurred in the AC system and the AC voltage has dropped sharply. Here, the accident in the AC system is, for example, a ground fault accident, and it is assumed that the AC system protection device recovers in about four AC cycles after the occurrence of the accident. When the AC voltage drops sharply, the commutation failure prevention control means 10 operates and attempts to advance the firing phase angle based on the equation (1), but the control response is slow as shown by the characteristic curve 2 in FIG. This will cause commutation failure.
【0010】即ち、転流失敗防止制御手段10は、1式
による演算を実行するために、交流変成器4の検出出力
から交流電圧の波高値、又は実効値Eiを導出する必要
がある。通常、交流電圧の波高値、又は実効値を導出す
るには、交流変成器4の検出出力を所定のサンプリング
周期でサンプリングし幾つかのサンプリングデータを基
にデジタル演算して求まるが交流電圧が急激に低下した
場合、低下時の波高値、又は実効値を導出するまでに
は、少なくとも交流の半サイクル程度の時間を要する。
従って、転流失敗防止制御手段10の制御応答が遅れる
ことになり、転流失敗を誘発する。That is, the commutation failure prevention control means 10 needs to derive the peak value or the effective value Ei of the AC voltage from the detection output of the AC transformer 4 in order to execute the calculation by the equation (1). Usually, to derive the peak value or the effective value of the AC voltage, it is obtained by sampling the detection output of the AC transformer 4 at a predetermined sampling cycle and performing digital operation based on some sampling data. , It takes at least about half an AC cycle to derive the peak value or the effective value at the time of the decrease.
Therefore, the control response of the commutation failure prevention control means 10 is delayed, and a commutation failure is induced.
【0011】転流失敗が発生すると、直流側の電流が交
流側に変換されて流れなくなるので、直流変成器6、及
び交流変成器5の出力を入力する転流失敗検出手段8が
転流失敗を検出し、位相進め戻し手段15を動作させ
る。位相進め戻し手段15は、転流失敗検出手段8が転
流失敗を検出すると、図3の特性曲線1のように、位相
制御信号を点弧位相角120°に相当する信号に設定す
る。点弧位相角120°とするのは、系統条件など加味
し、所定の送電電力を確保し得るように経験的に設定し
たものである。When a commutation failure occurs, the current on the DC side is converted to the AC side and stops flowing, so that the commutation failure detecting means 8 which inputs the outputs of the DC transformer 6 and the AC transformer 5 performs commutation failure. Is detected, and the phase advance / return means 15 is operated. When the commutation failure detecting means 8 detects the commutation failure, the phase advance / return means 15 sets the phase control signal to a signal corresponding to the firing phase angle of 120 ° as shown by the characteristic curve 1 in FIG. The firing phase angle of 120 ° is set empirically in consideration of system conditions and the like so that a predetermined transmission power can be secured.
【0012】この結果、制御選択手段12は、位相進め
戻し手段15の位相制御信号を選択するため、スイッチ
ング素子1の点弧パルスのタイミングが早くなり、余裕
角を確保して転流失敗を防止することができる。As a result, since the control selecting means 12 selects the phase control signal of the phase advance / return means 15, the timing of the ignition pulse of the switching element 1 is advanced, and a margin angle is secured to prevent commutation failure. can do.
【0013】交流電圧の低下が継続する間は、位相進め
戻し手段15は点弧位相角120°の位相制御信号を継
続して出力するが、その後、事故が解除されて復旧し、
交流電圧低下検出手段が交流電圧が所定レベル以上にな
ったことを検出すると、図3に示すように、位相進め戻
し手段15は進めていた点弧位相角を所定の時定数で元
に戻して行くことにより、直流電圧を回復させる。直流
電圧が回復しても、定電圧制御手段11の応答が非常に
遅く設定されているために、定電圧制御手段11の位相
制御信号はすぐには制御選択手段12で選択されず、図
3に示されるように、定電圧制御手段11の位相制御信
号が選択されるまでの間、転流失敗防止制御手段10の
位相制御信号が選択されて、点弧制御がなされる。図5
にこの従来装置の動作により送電する直流電力を特性曲
線2で示す。While the decrease in the AC voltage continues, the phase advance / return means 15 continuously outputs a phase control signal having a firing phase angle of 120 °.
When the AC voltage drop detecting means detects that the AC voltage has become equal to or higher than the predetermined level, as shown in FIG. 3, the phase advance / return means 15 returns the advanced ignition phase angle to the original by a predetermined time constant. Go to restore the DC voltage. Even if the DC voltage recovers, the response of the constant voltage control means 11 is set to be very slow, so that the phase control signal of the constant voltage control means 11 is not immediately selected by the control selection means 12, and the control signal shown in FIG. As shown in (1), until the phase control signal of the constant voltage control means 11 is selected, the phase control signal of the commutation failure prevention control means 10 is selected, and the ignition control is performed. FIG.
The characteristic curve 2 shows the DC power transmitted by the operation of this conventional device.
【0014】[0014]
【発明が解決しようとする課題】従来の逆変換器の制御
装置は、以上のように転流失敗検出手段により転流失敗
が検出されると、位相進め戻し手段15が系統条件など
を加味し、所定の送電電力を確保し得るように設定した
円弧位相角120°に進めるものであるので、設定する
点弧位相角で点弧しても転流失敗を起こす場合には、依
然として転流失敗が継続するため、送電できなくなって
しまう問題点があった。In the conventional inverter control device, when the commutation failure is detected by the commutation failure detection means as described above, the phase advance / return means 15 takes into account system conditions and the like. However, if the commutation fails even if the ignition is performed at the set ignition phase angle, the commutation still fails. However, there is a problem that power transmission cannot be performed.
【0015】また、交流系統側の電圧低下が小さく、位
相進め戻し手段が設定する点弧位相角よりも遅れた点弧
位相角であっても充分に転流が可能な場合でも、所定レ
ベル交流電圧が回復するまで継続して、設定する円弧位
相角で点弧制御するので、転流失敗が防止できたとして
も、充分な送電ができない問題点があった。Further, even if the voltage drop on the AC system side is small and the commutation is sufficiently possible even if the ignition phase angle is delayed from the ignition phase angle set by the phase advance / return means, the predetermined level AC Since the firing control is continued at the set arc phase angle until the voltage recovers, there is a problem that even if commutation failure can be prevented, sufficient power transmission cannot be performed.
【0016】この発明は、このような問題点を解決する
ためになされたものであり、転流失敗の継続を確実に防
止し、かつ交流系統への電力供給を最大限に行うことの
できる装置を提供することを目的としている。The present invention has been made to solve such a problem, and it is an apparatus capable of reliably preventing commutation failure from continuing and maximizing power supply to an AC system. It is intended to provide.
【0017】[0017]
【課題を解決するための手段】この発明の請求項1に係
る逆変換器の制御装置は、転流失敗を検出する転流失敗
検出手段と、この転流失敗検出手段の動作により、スイ
ッチング素子の点弧位相角を90°近傍まで進め、その
直後の所定の時定数で遅らせていく位相制御信号を導出
する位相進め戻し手段と、スイッチング素子を転流失敗
させない所定の余裕角を保持する点弧位相角に応じた位
相制御信号を導出する転流失敗制御手段と、上記位相進
め戻し手段、又は転流失敗防止制御手段の導出する位相
制御信号の内、進み側の位相制御信号を選択して点弧パ
ルス発生手段に出力する制御選択手段とを設けたもので
ある。According to a first aspect of the present invention, there is provided a control device for an inverter, comprising: a commutation failure detecting means for detecting a commutation failure; Means for deriving a phase control signal for advancing the firing phase angle to about 90 ° and delaying it by a predetermined time constant immediately after that, and a point for maintaining a predetermined margin angle for preventing commutation failure of the switching element. A commutation failure control means for deriving a phase control signal corresponding to the arc phase angle, and a phase control signal on the leading side selected from the phase control signals derived by the phase advance / return means or the commutation failure prevention control means. And a control selecting means for outputting to the firing pulse generating means.
【0018】この発明の請求項2に係る逆変換器の制御
装置は、交流の電圧低下を検出する電圧低下検出手段
と、この電圧低下検出手段の動作により、スイッチング
素子の点弧位相角を90°近傍まで進め、その直後に所
定の時定数で遅らせていく位相制御信号を導出する位相
進め戻し手段と、スイッチング素子を転流失敗させない
所定の余裕角を保持する点弧位相角に応じた位相制御信
号を導出する転流失敗防止制御手段と、上記位相進め戻
し手段、又は転流失敗防止制御手段の導出する位相制御
信号の内、進み側の位相制御信号を選択して点弧パルス
発生手段に出力する制御選択手段とを設けたものであ
る。According to a second aspect of the present invention, there is provided a control device for an inverter, comprising: a voltage drop detecting means for detecting a voltage drop of an AC voltage; °, and a phase advance / return means for deriving a phase control signal that delays by a predetermined time constant immediately after that, and a phase corresponding to a firing phase angle that maintains a predetermined margin angle that prevents commutation failure of the switching element. A commutation failure prevention control means for deriving a control signal, and a phase control signal derived from the phase advance / return means or the commutation failure prevention control means, and selecting a leading phase control signal to generate an ignition pulse generating means And a control selecting means for outputting the data to the control unit.
【0019】この発明の請求項3に係る逆変換器の制御
装置は、転流失敗を検出する転流失敗検出手段と、この
転流失敗検出手段の動作により、スイッチング素子の点
弧位相角を90°近傍まで進め、その直後に上記交流の
電圧低下度に応じて決定される時定数で遅らせていく位
相制御信号を導出する位相進め戻し手段と、スイッチン
グ素子を転流失敗させない所定の余裕角を保持する点弧
位相角に応じた位相制御信号を導出する転流失敗防止制
御手段と、上記位相進め戻し手段、又は転流失敗防止制
御手段の導出する位相制御信号の内、進み側の位相制御
信号を選択して点弧パルス発生手段に出力する制御選択
手段とを設けたものである。According to a third aspect of the present invention, there is provided a control device for an inverter, comprising: a commutation failure detecting means for detecting a commutation failure; A phase advancing / returning means for deriving a phase control signal for advancing to near 90 ° and delaying by a time constant determined according to the degree of voltage drop of the AC immediately thereafter, a predetermined margin angle for preventing commutation failure of the switching element The commutation failure prevention control means for deriving a phase control signal according to the firing phase angle, and the phase advance signal of the phase advance / return means or the phase control signal derived by the commutation failure prevention control means. Control selection means for selecting a control signal and outputting it to the firing pulse generation means.
【0020】この発明の請求項4に係る逆変換器の制御
装置は、交流の電圧低下を検出する電圧低下検出手段
と、この電圧低下検出手段の動作により、スイッチング
素子の点弧位相角を90°近傍まで進め、その直後に上
記交流の電圧低下度に応じて決定される時定数で遅らせ
ていく位相制御信号を導出する位相進め戻し手段と、ス
イッチング素子を転流失敗させない所定の余裕角を保持
する点弧位相角に応じた位相制御信号を導出する転流失
敗防止制御手段と、上記位相進め戻し手段、又は転流失
敗防止制御手段の導出する位相制御信号の内、進み側の
位相制御信号を選択して点弧パルス発生手段に出力する
制御選択手段とを設けたものである。According to a fourth aspect of the present invention, there is provided a control device for an inverter, comprising: a voltage drop detecting means for detecting a voltage drop of an AC; ° to the vicinity, and immediately thereafter, a phase advancing and returning means for deriving a phase control signal that delays by a time constant determined according to the voltage drop of the AC, and a predetermined margin angle that does not cause the commutation failure of the switching element. A commutation failure prevention control means for deriving a phase control signal corresponding to the firing phase angle to be held, and a phase control on the leading side of the phase control signal derived by the phase advance / return means or the commutation failure prevention control means Control selection means for selecting a signal and outputting the signal to the ignition pulse generation means.
【0021】この発明の請求項5に係る逆変換器の制御
装置は、上記請求項1〜4の発明において、直流電圧を
導入し、直流電圧が設定の電圧となる点弧位相角に応じ
た位相制御信号を導出する定電圧制御手段を設け、制御
選択手段に位相進め戻し手段、転流失敗防止制御手段の
位相制御信号とともに定電圧制御手段の導出する位相制
御信号も出力いるようにしたものである。According to a fifth aspect of the present invention, there is provided a control device for an inverter according to the first to fourth aspects, wherein a DC voltage is introduced and the DC voltage is set according to a firing phase angle at which a set voltage is obtained. A constant voltage control means for deriving a phase control signal, wherein the control selection means outputs a phase control signal derived by the constant voltage control means together with a phase control signal of the phase advance / return means and the commutation failure prevention control means. It is.
【0022】[0022]
【作用】この発明における請求項1の逆変換器の制御装
置は、転流失敗検出時にスイッチング素子の点弧位相角
を90°近傍まで進めるため、転流失敗の継続が確実に
防止でき、また、その直後に所定の時定数で点弧位相角
を遅らせて行くため、制御選択手段の選択する進み側の
位相制御信号により交流系統への電力供給を最大限に行
うことのできる。The control device for the inverter according to the first aspect of the present invention advances the ignition phase angle of the switching element to near 90 ° when the commutation failure is detected, so that the continuation of the commutation failure can be reliably prevented. Immediately after that, the ignition phase angle is delayed by a predetermined time constant, so that the power supply to the AC system can be maximized by the leading phase control signal selected by the control selecting means.
【0023】この発明における請求項2の逆変換器の制
御装置は、電圧低下検出時にスイッチング素子の点弧位
相角を90°近傍まで進めるため、電圧低下により誘発
する転流失敗を確実に防止でき、また、その直後に所定
の時定数で点弧位相角を遅らせて行くため、制御選択手
段の選択する進み側の位相制御信号により交流系統への
電力供給を最大限に行うことのできる。In the inverter control device according to the second aspect of the present invention, when the voltage drop is detected, the ignition phase angle of the switching element is advanced to near 90 °, so that the commutation failure induced by the voltage drop can be reliably prevented. In addition, since the ignition phase angle is delayed by a predetermined time constant immediately after that, the power supply to the AC system can be maximized by the leading phase control signal selected by the control selecting means.
【0024】この発明における請求項3の逆変換器の制
御装置は、転流失敗検出時にスイッチング素子の点弧位
相角を90°近傍まで進めるため、転流失敗の継続が確
実に防止でき、また、その直後に交流の電圧低下度に応
じて決定される時定数により系統に動揺を与えることな
く迅速に点弧位相角を遅らせて行くため、制御選択手段
の選択する進み側の位相制御信号により交流系統への電
力供給を最大限に行うことのできる。According to the third aspect of the present invention, the control device for the inverter can advance the firing phase angle of the switching element to near 90 ° when the commutation failure is detected, so that the continuation of the commutation failure can be reliably prevented. Immediately after that, the ignition phase angle is quickly delayed without giving any fluctuation to the system by the time constant determined according to the degree of the voltage drop of the alternating current. Power supply to the AC system can be maximized.
【0025】この発明における請求項4の逆変換器の制
御装置は、電圧低下検出時にスイッチング素子の点弧位
相角を90°近傍まで進めるため、電圧低下により誘発
する転流失敗を確実に防止でき、また、その直後に交流
の電圧低下度に応じて決定される時定数により系統に動
揺を与えることなく迅速に点弧位相角を遅らせて行くた
め、制御選択手段の選択する進み側の位相制御信号によ
り交流系統への電力供給を最大限に行うことのできる。In the control device for an inverter according to the fourth aspect of the present invention, when the voltage drop is detected, the ignition phase angle of the switching element is advanced to near 90 °, so that the commutation failure induced by the voltage drop can be reliably prevented. Further, immediately after that, the ignition phase angle is quickly delayed without giving any fluctuation to the system by a time constant determined according to the degree of AC voltage drop, so that the phase control on the leading side selected by the control selection means is performed. The signal can maximize the power supply to the AC system.
【0026】この発明における請求項5の逆変換器の制
御装置は、上記請求項1〜4の発明において、電圧制御
手段を設けているので、制御選択手段は、位相進め戻し
手段、転流失敗防止制御手段、又は定電圧制御手段の導
出する位相制御信号を点弧パルス発生手段に出力する。According to a fifth aspect of the present invention, there is provided a control device for an inverter, which is provided with the voltage control means according to the first to fourth aspects of the present invention. A phase control signal derived from the prevention control means or the constant voltage control means is output to the ignition pulse generation means.
【0027】[0027]
【実施例】実施例1.以下、この発明の一実施例につい
て、図1に基づいて説明する。図1において、9は位相
進め戻し手段であり、転流失敗検出手段8により転流失
敗が検出されると、スイッチング素子の点弧位相角を9
0°近傍まで進め、その直後に所定の時定数で遅らせて
いく位相制御信号を導出して、制御選択手段に出力する
ものである。[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 9 denotes a phase advancing / returning unit. When a commutation failure is detected by the commutation failure detection unit 8, the firing phase angle of the switching element is set to 9;
A phase control signal which advances to near 0 ° and is delayed by a predetermined time constant immediately thereafter is derived and output to the control selecting means.
【0028】次にこの実施例1による他励式逆変換装置
の制御装置の動作について、図4を参照しながら説明す
る。交流系統に事故が発生して交流電圧が急激に低下し
た場合に、転流失敗防止制御手段10の制御応答が電圧
低下に追従できないために転流失敗防止制御手段10の
位相制御信号による点弧制御では余裕角が確保できず転
流失敗が発生する。転流失敗検出手段8がこの転流失敗
を検出すると、位相進め戻し手段9による点弧位相角指
令が図4に示す特性曲線1のように90°付近に設定さ
れた位相角に進んで最小になり、制御選択手段12で選
択されるようになる。その結果、点弧パルスのタイミン
グが早くなり充分な余裕角を確保して転流失敗を防止す
ることが可能になる。その直後に位相進め戻し手段9は
進めていた点弧位相角を所定の時定数で遅らせ、位相戻
しを開始する。その動作と平行して、転流失敗防止制御
手段10の応答が交流電圧低下に追従して所定の余裕角
を確保する点弧位相角を設定できるようになる。そして
図4に示すように転流失敗防止制御手段10の曲線2と
位相進め戻し手段9の曲線1とが交わり同一の位相角に
なると、制御選択手段12により転流失敗防止制御手段
10の弧位相角が選択される。その結果、図15の曲線
1のように転流失敗を防止しつつ、従来の曲線2に比較
して最大限の電力送電を行うことが可能になる。従っ
て、事故復旧後の交流系統の回復を速くすることができ
る。Next, the operation of the control device of the separately-excited inverse converter according to the first embodiment will be described with reference to FIG. When the AC voltage suddenly drops due to an accident in the AC system, the control response of the commutation failure prevention control means 10 cannot follow the voltage drop. In the control, a margin angle cannot be secured, and commutation failure occurs. When the commutation failure detecting means 8 detects this commutation failure, the firing phase angle command by the phase advance / return means 9 advances to the phase angle set near 90 ° as shown by the characteristic curve 1 in FIG. , And the selection is made by the control selection means 12. As a result, the timing of the firing pulse is advanced, and a sufficient margin angle can be secured to prevent a commutation failure. Immediately thereafter, the phase advance / return means 9 delays the advanced ignition phase angle by a predetermined time constant, and starts phase return. In parallel with this operation, the ignition phase angle at which the response of the commutation failure prevention control means 10 follows the AC voltage drop and secures a predetermined margin angle can be set. Then, as shown in FIG. 4, when the curve 2 of the commutation failure prevention control means 10 and the curve 1 of the phase advance / return means 9 intersect and have the same phase angle, the arc of the commutation failure prevention control means 10 is controlled by the control selection means 12. The phase angle is selected. As a result, it is possible to perform the maximum power transmission as compared with the conventional curve 2 while preventing commutation failure as shown by the curve 1 in FIG. Therefore, the recovery of the AC system after the restoration of the accident can be accelerated.
【0029】実施例2.図6はこの発明の実施例2によ
る逆変換器の制御装置ブロック図である。実施例1で
は、転流失敗を検出して、位相進め戻し手段16が点弧
位相角を90°付近へ進めるが、この実施例2では、交
流電圧低下検出手段14により交流電圧が所定値以下に
低下したことを検出して、位相進め戻し手段16が点弧
位相角を90°付近へ進める。Embodiment 2 FIG. FIG. 6 is a block diagram of a control device of an inverter according to Embodiment 2 of the present invention. In the first embodiment, the commutation failure is detected, and the phase advance / return means 16 advances the ignition phase angle to around 90 °. In the second embodiment, the AC voltage drop detection means 14 reduces the AC voltage to a predetermined value or less. , The phase advance / return means 16 advances the firing phase angle to around 90 °.
【0030】このように、この実施例2の装置では、位
相進め戻し手段16が転流失敗を誘発する原因となる交
流電圧の低下そのものを検出するため、実施例1の装置
と比較して、迅速な制御を行なうことができ、一度も転
流失敗をせずに運転継続が可能な場合があり、より大き
な電力送電を行うことが可能になる。As described above, in the apparatus of the second embodiment, the phase advance / return means 16 detects the drop of the AC voltage itself which causes the commutation failure. It is possible to perform quick control, and in some cases, it is possible to continue operation without causing a commutation failure, and it is possible to perform larger power transmission.
【0031】実施例3.図7はこの発明の実施例3によ
る逆変換器の制御装置ブロック図である。実施例1で
は、位相進め戻し手段17が、90°付近へ進めた点弧
位相角を所定の予め決められた時定数で戻していくが、
この実施例3では、交流電圧低下検出手段14が検出し
た交流電圧の低下度に応じた点弧位相角の戻し時定数を
決定する。即ち、電圧低下が大きな場合、交流系統の回
復は、緩かに行なう必要があり、この場合、時定数を長
くとる。逆に電圧低下が小さな場合は、時定数を短かく
する。この結果、交流系統に動揺を与えることがなく、
かつ迅速な回復が期待できる。Embodiment 3 FIG. FIG. 7 is a block diagram of a control device of an inverter according to Embodiment 3 of the present invention. In the first embodiment, the phase advance / return means 17 returns the ignition phase angle advanced to around 90 ° by a predetermined time constant.
In the third embodiment, the return time constant of the ignition phase angle according to the degree of decrease in the AC voltage detected by the AC voltage decrease detection means 14 is determined. That is, when the voltage drop is large, the AC system needs to be restored slowly, and in this case, the time constant is set long. Conversely, when the voltage drop is small, the time constant is shortened. As a result, there is no upset in the AC system,
And quick recovery can be expected.
【0032】このように、この実施例3の装置では、位
相進め戻し手段17が交流電圧の低下度に応じて決定さ
れる時定数で点弧位相角を戻すために、転流失敗防止制
御手段10が設定する点弧位相角がより早く選択される
ようにでき、より大きな電力を行うことが可能になる。As described above, in the apparatus according to the third embodiment, the phase advance / return means 17 returns the firing phase angle with the time constant determined according to the degree of decrease of the AC voltage. The ignition phase angle set by 10 can be selected earlier, and larger power can be obtained.
【0033】実施例4.図8は実施例4による逆変換器
の制御装置ブロック図である。実施例2では、位相進め
戻し手段18が、90°付近へ進めた点弧位相角を所定
の予め決められた時定数で戻していくが、この実施例4
では、交流低下検出手段14が検出した交流電圧低の下
度に応じた点弧位相角の戻し時定数が決定する。Embodiment 4 FIG. FIG. 8 is a block diagram of a control device of the inverter according to the fourth embodiment. In the second embodiment, the phase advance / return means 18 returns the ignition phase angle advanced to around 90 ° by a predetermined time constant.
Then, the return time constant of the ignition phase angle corresponding to the degree of the low AC voltage detected by the AC drop detecting means 14 is determined.
【0034】このように、この実施例4の装置では、位
相進め戻し手段18が交流電圧の低下度に応じて決定さ
れる時定数で点弧位相角を戻すために、転流失敗防止制
御手段10が設定する点弧位相角がより早く選択される
ようにでき、より大きな電力送電を行うことが可能にな
る。As described above, in the apparatus of the fourth embodiment, the phase advance / return means 18 returns the firing phase angle with the time constant determined according to the degree of decrease in the AC voltage. The ignition phase angle set by 10 can be selected earlier, and larger power transmission can be performed.
【0035】[0035]
【発明の効果】以上述べたように、この発明の請求項1
に係る発明によれば、転流失敗検出手段の動作により、
スイッチング素子の点弧位相角を90°近傍まで進め、
その直後に所定の時定数で遅らせていく位相制御信号を
導出する位相進め戻し手段と、スイッチング素子を転流
失敗させない所定の余裕角を保持する点弧位相角に応じ
た位相制御信号を導出する転流失敗防止制御手段と、上
記位相進め戻し手段、又は転流失敗防止制御手段の導出
する位相制御信号の内、進み側の位相制御信号を選択し
て点弧パルス発生手段に出力するようにしたので、転流
失敗の継続が確実に防止でき、また、交流系統への電力
供給を最大限に行うことのできる。As described above, the first aspect of the present invention is as follows.
According to the invention according to the above, by the operation of the commutation failure detection means,
Advance the firing phase angle of the switching element to around 90 °,
Immediately thereafter, a phase advance / return means for deriving a phase control signal to be delayed by a predetermined time constant, and a phase control signal corresponding to a firing phase angle for maintaining a predetermined margin angle for preventing commutation failure of the switching element. The commutation failure prevention control means, the phase advance / return means, or the phase control signal derived from the commutation failure prevention control means, the leading phase control signal is selected and output to the firing pulse generation means. Therefore, the continuation of the commutation failure can be reliably prevented, and the power supply to the AC system can be maximized.
【0036】また、この発明の請求項2に係る発明によ
れば、電圧低下検出手段の動作により、スイッチング素
子の点弧位相角を90°近傍まで進め、その直後に所定
の時定数で遅らせていく位相制御信号を導出する位相進
め戻し手段と、スイッチング素子を転流失敗させない所
定の余裕角を保持する点弧位相角に応じた位相制御信号
を導出する転流失敗防止制御手段と、上記位相進め戻し
手段、又は転流失敗防止制御手段の導出する位相制御信
号の内、進み側の位相制御信号を選択して点弧パルス発
生手段に出力するようにしたので、電圧低下による誘発
する転流失敗を確実に防止でき、また、交流系統への電
力供給を最大限に行うことのできる。According to the second aspect of the present invention, the ignition phase angle of the switching element is advanced to about 90 ° by the operation of the voltage drop detecting means, and immediately thereafter, the ignition phase angle is delayed by a predetermined time constant. Phase advance / return means for deriving a phase control signal, commutation failure prevention control means for deriving a phase control signal corresponding to a firing phase angle that maintains a predetermined margin angle for preventing commutation failure of the switching element, and The phase control signal on the leading side is selected from the phase control signals derived by the advance / return means or the commutation failure prevention control means and is output to the ignition pulse generating means. Failure can be reliably prevented, and power supply to the AC system can be maximized.
【0037】以上述べたように、この発明の請求項3に
係る発明によれば、転流失敗検出手段の動作により、ス
イッチング素子の点弧位相角を90°近傍まで進め、そ
の直後に交流の電圧低下度に応じて決定される時定数で
遅らせていく位相制御信号を導出する位相進め戻し手段
と、スイッチング素子を転流失敗させない所定の余裕角
を保持する点弧位相角に応じた位相制御信号を導出する
転流失敗防止制御手段と、上記位相進め戻し手段、又は
転流失敗防止制御手段の導出する位相制御信号の内、進
み側の位相制御信号を選択して点弧パルス発生手段に出
力するようにしたので、転流失敗の継続が確実に防止で
き、また、交流系統に動揺を与えることなく交流系統へ
の電力供給を最大限に行うことのできる。As described above, according to the third aspect of the present invention, by the operation of the commutation failure detecting means, the firing phase angle of the switching element is advanced to about 90 °, and immediately thereafter, the AC Phase advance / return means for deriving a phase control signal that delays by a time constant determined according to the degree of voltage drop, and phase control according to a firing phase angle that maintains a predetermined margin angle that prevents commutation failure of the switching element The commutation failure prevention control means for deriving a signal, and the phase advance / return means, or the phase control signal derived from the commutation failure prevention control means, select the leading phase control signal and select the ignition pulse generation means. Since the output is performed, the continuation of the commutation failure can be reliably prevented, and the power supply to the AC system can be maximized without causing the AC system to fluctuate.
【0038】また、この発明の請求項4に係る発明によ
れば、電圧低下検出手段の動作により、スイッチング素
子の点弧位相角を90°近傍まで進め、その直後に交流
の電圧低下度に応じて決定される時定数で遅らせていく
位相制御信号を導出する位相進め戻し手段と、スイッチ
ング素子を転流失敗させない所定の余裕角を保持する点
弧位相角に応じた位相制御信号を導出する転流失敗防止
制御手段と、上記位相進め戻し手段、又は転流失敗防止
制御手段の導出する位相制御信号の内、進み側の位相制
御信号を選択して点弧パルス発生手段に出力するように
したので、電圧低下による誘発する転流失敗を確実に防
止でき、また、交流系統に動揺を与えることなく交流系
統への電力供給を最大限に行うことのできる。According to the invention of claim 4 of the present invention, the ignition phase angle of the switching element is advanced to about 90 ° by the operation of the voltage drop detecting means, and immediately thereafter, the ignition phase angle is changed according to the AC voltage drop degree. Phase advancing means for deriving a phase control signal to be delayed by a time constant determined in accordance with the present invention, and a phase advancing means for deriving a phase control signal corresponding to a firing phase angle which maintains a predetermined margin angle for preventing commutation failure of the switching element. Among the phase control signals derived from the flow failure prevention control means, the phase advance / return means, or the commutation failure prevention control means, the phase control signal on the leading side is selected and output to the firing pulse generation means. Therefore, the commutation failure induced by the voltage drop can be reliably prevented, and the power supply to the AC system can be maximized without causing any fluctuation in the AC system.
【図1】この発明の実施例1を示す逆変換器の制御装置
を示す制御ブロック図である。FIG. 1 is a control block diagram illustrating a control device of an inverter according to a first embodiment of the present invention.
【図2】従来の逆変換器の制御装置を示す制御ブロック
図である。FIG. 2 is a control block diagram illustrating a control device of a conventional inverter.
【図3】従来の制御装置を構成する各制御手段が設定す
る点弧位相角と時間との関係を表した特性図である。FIG. 3 is a characteristic diagram showing a relationship between a firing phase angle and time set by each control means constituting a conventional control device.
【図4】この発明の実施例の制御装置を構成する各制御
手段が設定する点弧位相角と時間との関係を表した特性
図である。FIG. 4 is a characteristic diagram showing a relationship between a firing phase angle and time set by each control means constituting the control device according to the embodiment of the present invention.
【図5】従来の制御装置による直流送電電力及びこの発
明の実施例の制御装置による直流送電電力と時間との関
係を表した特性図である。FIG. 5 is a characteristic diagram showing a relationship between DC transmission power by a conventional control device and DC transmission power by a control device according to an embodiment of the present invention and time.
【図6】この発明の実施例2を示す逆変換器の制御装置
を示す制御ブロック図である。FIG. 6 is a control block diagram illustrating a control device of an inverter according to a second embodiment of the present invention.
【図7】この発明の実施例3を示す逆変換器の制御装置
を示す制御ブロック図である。FIG. 7 is a control block diagram illustrating a control device of an inverter according to a third embodiment of the present invention.
【図8】この発明の実施例4を示す逆変換器の制御装置
を示す制御ブロック図である。FIG. 8 is a control block diagram illustrating a control device of an inverter according to a fourth embodiment of the present invention.
1 他励式スイッチング素子 2 変圧器 3 リアクトル 4 交流変成器 5 交流変成器 6 直流変成器 7 直流変成器 8 転流失敗検出手段 9 位相進め戻し手段 10 転流失敗防止制御手段 11 定電圧制御手段 12 制御選択手段 13 点弧パルス発生手段 14 交流電圧低下検出手段 15 位相進め戻し手段 16 位相進め戻し手段 17 位相進め戻し手段 18 位相進め戻し手段 REFERENCE SIGNS LIST 1 separately-excited switching element 2 transformer 3 reactor 4 AC transformer 5 AC transformer 6 DC transformer 7 DC transformer 8 Commutation failure detection means 9 Phase advance return means 10 Commutation failure prevention control means 11 Constant voltage control means 12 Control selecting means 13 Firing pulse generating means 14 AC voltage drop detecting means 15 Phase advance / return means 16 Phase advance / return means 17 Phase advance / return means 18 Phase advance / return means
Claims (5)
構成する複数のスイッチング素子、このスイッチング素
子の転流失敗を検出する転流失敗検出手段、上記スイッ
チング素子を転流失敗させない所定の余裕角を保持する
点弧位相角に応じた位相制御信号を導出する転流失敗防
止制御手段、上記転流失敗手段により、上記スイッチン
グ素子の転流失敗を検出したとき、上記スイッチング素
子の点弧位相角を90°近傍まで進め、その直後に所定
の時定数で遅らせていく位相制御信号を導出する位相進
め戻し手段、この位相進め戻し手段、又は上記転流失敗
防止制御手段の導出する位相制御信号の内、進み側の位
相制御信号を選択する制御選択手段、この制御選択手段
の選択する位相制御信号に基づいて、上記スイッチング
素子を点弧する点弧パルス発生手段を備えたことを特徴
とする逆変換器の制御装置。1. A plurality of switching elements constituting an inverter circuit for converting direct current to alternating current, commutation failure detection means for detecting commutation failure of the switching elements, and a predetermined margin angle for preventing commutation failure of the switching elements. The commutation failure prevention control means for deriving a phase control signal corresponding to the firing phase angle to be held, by the commutation failure means, when detecting the commutation failure of the switching element, the ignition phase angle of the switching element Phase advance / return means for deriving a phase control signal that advances to near 90 ° and delays by a predetermined time constant immediately thereafter, among phase control signals derived from the phase advance / return means or the commutation failure prevention control means Control selecting means for selecting a leading phase control signal, and firing the switching element based on the phase control signal selected by the control selecting means. Controller of inverter, characterized in that it comprises a pulse generating means.
構成する複数のスイッチング素子、上記交流の電圧低下
を検出する電圧低下検出手段、上記スイッチング素子を
転流失敗させない所定の余裕角を保持する点弧位相角に
応じた位相制御信号を導出する転流失敗防止制御手段、
上記電圧低下検出手段により交流の電圧低下を検出した
とき、上記スイッチング素子の点弧位相角を90°近傍
まで進め、その直後に所定の時定数で遅らせていく位相
制御信号を導出する位相進め戻し手段、この位相進め戻
し手段、又は上記転流失敗防止制御手段の導出する位相
制御信号の内、進み側の位相制御信号を選択する制御選
択手段、この制御選択手段の選択する位相制御信号に基
づいて、上記スイッチング素子を点弧する点弧パルス発
生手段を備えたことを特徴とする逆変換器の制御装置。2. A plurality of switching elements constituting an inverter circuit for converting a direct current into an alternating current, voltage drop detecting means for detecting a voltage drop of the alternating current, and a point for maintaining a predetermined margin angle for preventing commutation failure of the switching elements. Commutation failure prevention control means for deriving a phase control signal according to the arc phase angle,
When the AC voltage drop is detected by the voltage drop detecting means, the ignition phase angle of the switching element is advanced to near 90 °, and immediately after that, a phase advance signal for deriving a phase control signal for delaying by a predetermined time constant is returned. Control selection means for selecting a leading phase control signal from the phase control signals derived by the means, the phase advance / return means, or the commutation failure prevention control means, based on the phase control signal selected by the control selection means. And an ignition pulse generating means for igniting the switching element.
構成する複数のスイチング素子、このスイッチング素子
の転流失敗を検出する転流失敗検出手段、上記スイッチ
ング素子を転流失敗させない所定の余裕角を保持する点
弧位相角に応じた位相制御信号を導出する転流失敗防止
制御手段、上記転流失敗手段により、上記スイッチング
素子の転流失敗を検出したとき、上記スイッチング素子
の点弧位相角を90°近傍まで進め、その直後に上記交
流の電圧低下度に応じて決定される時定数で遅らせてい
く位相制御信号を導出する位相進め戻し手段、この位相
進め戻し手段、又は上記転流失敗防止制御手段の導出す
る位相制御信号の内、進み側の位相制御信号を選択する
制御選択手段、この制御選択手段の選択する位相制御信
号に基づいて、上記スイッチング素子を点弧する点弧パ
ルス発生手段を備えたことを特徴とする逆変換器の制御
装置。3. A plurality of switching elements constituting an inverter circuit for converting DC to AC, commutation failure detection means for detecting commutation failure of the switching element, and a predetermined margin angle for preventing the switching element from failing in commutation. The commutation failure prevention control means for deriving a phase control signal corresponding to the firing phase angle to be held, by the commutation failure means, when detecting the commutation failure of the switching element, the ignition phase angle of the switching element Phase advance / return means for deriving a phase control signal that advances to near 90 ° and delays by a time constant determined according to the AC voltage drop immediately thereafter, the phase advance / return means, or the commutation failure prevention Among the phase control signals derived by the control means, control selection means for selecting a leading phase control signal, based on the phase control signal selected by the control selection means, Controller of inverter, characterized in that it comprises a firing pulse generating means that it firing a switching element.
構成する複数のスイッチング素子、上記交流の電圧低下
を検出する電圧低下検出手段、上記スイッチング素子を
転流失敗させない所定の余裕角を保持する点弧位相角に
応じた位相制御信号を導出する転流失敗防止制御手段、
上記電圧低下検出手段により交流の電圧低下を検出した
とき、上記スイッチング素子の点弧位相角を90°近傍
まで進め、その直後に上記交流の電圧低下度に応じて決
定される時定数で遅らせていく位相制御信号を導出する
位相進め戻し手段、この位相進め戻し手段、又は上記転
流失敗防止制御手段の導出する位相制御信号の内、進み
側の位相制御信号を選択する制御選択手段、この制御選
択手段の選択する位相制御信号に基づいて、上記スイッ
チング素子を点弧する点弧パルス発生手段を備えたこと
を特徴とする逆変換器の制御装置。4. A plurality of switching elements constituting an inverter circuit for converting direct current to alternating current, voltage drop detecting means for detecting a voltage drop of the alternating current, and a point for maintaining a predetermined margin angle for preventing commutation failure of the switching elements. Commutation failure prevention control means for deriving a phase control signal according to the arc phase angle,
When the AC voltage drop is detected by the voltage drop detecting means, the ignition phase angle of the switching element is advanced to near 90 °, and immediately thereafter, the switching element is delayed by a time constant determined according to the AC voltage drop degree. Control means for selecting a leading phase control signal from phase control signals derived by the phase advance / return means, the phase advance / return means, or the commutation failure prevention control means; A control device for an inverter, comprising a firing pulse generating means for firing the switching element based on a phase control signal selected by the selecting means.
定電圧となる点弧位相角に応じた位相制御信号を導出す
る定電圧制御手段を設け、制御選択手段は、定電圧制御
手段、位相進め戻し手段、又は上記転流失敗防止制御手
段の導出する位相制御信号の内、進み側の位相制御信号
を選択することを特徴とする請求項1〜請求項4のいず
れかに記載の逆変換器の制御装置。5. A constant voltage control means for introducing a DC voltage and deriving a phase control signal corresponding to a firing phase angle at which the DC voltage becomes a set voltage, wherein the control selection means comprises a constant voltage control means. The phase control signal on the leading side is selected from the phase control signals derived by the phase advance / return means or the commutation failure prevention control means. Inverter control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5313335A JP2797937B2 (en) | 1993-12-14 | 1993-12-14 | Inverter control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5313335A JP2797937B2 (en) | 1993-12-14 | 1993-12-14 | Inverter control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07170756A JPH07170756A (en) | 1995-07-04 |
JP2797937B2 true JP2797937B2 (en) | 1998-09-17 |
Family
ID=18040009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5313335A Expired - Fee Related JP2797937B2 (en) | 1993-12-14 | 1993-12-14 | Inverter control device |
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Country | Link |
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JP (1) | JP2797937B2 (en) |
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CN103258077B (en) * | 2013-03-29 | 2016-08-03 | 国家电网公司 | A kind of ignition pulse generator simulator |
-
1993
- 1993-12-14 JP JP5313335A patent/JP2797937B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07170756A (en) | 1995-07-04 |
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