JP2894651B2 - Control device for AC / DC converter - Google Patents
Control device for AC / DC converterInfo
- Publication number
- JP2894651B2 JP2894651B2 JP3194670A JP19467091A JP2894651B2 JP 2894651 B2 JP2894651 B2 JP 2894651B2 JP 3194670 A JP3194670 A JP 3194670A JP 19467091 A JP19467091 A JP 19467091A JP 2894651 B2 JP2894651 B2 JP 2894651B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- bpp
- circuit
- control device
- converter
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Direct Current Feeding And Distribution (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、直流送電設備或いは周
波数変換設備等の直流連系設備に使用される交直変換器
の制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an AC / DC converter used for DC interconnection equipment such as DC power transmission equipment or frequency conversion equipment.
【0002】[0002]
【従来の技術】図3は直流送電設備或いは周波数変換設
備等の直流連系設備に使用される交直変換器の一方を示
したものである。図3において、1は直流リアクトル、
2U,2V,2W,2X,2Y,2Zはサイリスタバル
ブ、3は変換器用変圧器である。制御装置5A,5Bで
は位相制御回路6A,6Bにより、サイリスタバルブの
点弧タイミングを決定し、パルス発生装置4(以下、P
Gと記す)に送られ、各サイリスタバルブに8H,8L
の信号線を通して点弧指令(以下ゲ―トパルスと記す)
が与えられる。ここでは制御装置5はA系、B系の2重
系となっており片系(例えば5A)に異常が生じても、
異常系を切離し健全系(例えば5B)にて、直流連系設
備としては、正常に運転可能なように構成されている。
尚、PG4は、A系の制御装置5A及びB系の制御装置
5Bの位相制御信号(PHS信号)の内どちらか一方を
選択する機能を有している。2. Description of the Related Art FIG. 3 shows one of AC / DC converters used for DC interconnection equipment such as DC power transmission equipment or frequency conversion equipment. In FIG. 3, 1 is a DC reactor,
2U, 2V, 2W, 2X, 2Y, 2Z are thyristor valves, and 3 is a transformer for a converter. In the control devices 5A and 5B, the ignition timing of the thyristor valve is determined by the phase control circuits 6A and 6B, and the pulse generation device 4 (hereinafter referred to as P
G) and each thyristor valve has 8H, 8L
Command (hereinafter referred to as gate pulse) through the signal line of
Is given. Here, the control device 5 is a double system of the A system and the B system, and even if an abnormality occurs in one system (for example, 5A),
The abnormal system is separated from the normal system (for example, 5B) so that it can operate normally as a DC interconnection facility.
The PG 4 has a function of selecting one of the phase control signals (PHS signals) of the A-system control device 5A and the B-system control device 5B.
【0003】図3に示すような、直流連系設備において
は、バイパスペア(以下BPPと記す)と呼ぶ動作があ
る。BPPとは同じ相のバルブ例えば図3では2U,2
Xが同時に導通している状態即ち、直流回路から見ると
サイリスタバルブにより短絡された状態を言い、図3で
は2V,2Y又は2W,2Zが導通している状態もBP
P状態である。[0003] In a DC interconnection facility as shown in Fig. 3, there is an operation called a bypass pair (hereinafter referred to as BPP). A valve having the same phase as BPP, for example, 2U, 2 in FIG.
The state where X is conducting at the same time, that is, the state where the thyristor valve is short-circuited when viewed from the DC circuit. In FIG. 3, the state where 2V, 2Y or 2W, 2Z is conducting is also BP.
P state.
【0004】BPP相の選択は、位相制御回路6A,6
BからのPHS信号とBPP指令によりR相,S相,T
相の内いずれか1つの相がBPPとして選択されるよう
になっている。The selection of the BPP phase is performed by selecting the phase control circuits 6A and 6A.
R phase, S phase, T by PHS signal from B and BPP command
Any one of the phases is selected as the BPP.
【0005】交流系統の事故による交流電圧低下時、B
PP動作にて直流系を短絡し、交流系統を切離す。そし
て、交流電圧が正常な電圧に復帰した場合に再起動を行
うシ―ケンスを行うことがある。When the AC voltage drops due to an AC system accident, B
The DC system is short-circuited by the PP operation, and the AC system is disconnected. Then, when the AC voltage returns to a normal voltage, a sequence for restarting may be performed.
【0006】[0006]
【発明が解決しようとする課題】図3に示すように制御
装置5が、A系,B系の2重化構成になっている場合、
以下に述べる問題が生じる。As shown in FIG. 3, in the case where the control device 5 has an A-system and B-system duplex configuration,
The following problems arise.
【0007】制御装置5A,5Bは同一構成であるが、
位相制御回路6A,6B等の制御回路に使用する部品の
特性のバラツキや調整のバラツキ等により出力であるP
HS信号に、制御装置5A,5Bでタイミングに差異が
生じることは避けられない。例えば、制御装置5Aは、
R相をBPP相と選択し(2U,2XにPHS信号を出
力)制御装置5BはS相をBPP相と選択(2V,2Y
にPHS信号を出力)する場合がある。このように場
合、PG4は制御装置5Aもしくは制御装置5BのPH
S信号の内どちらか一方を選択する機能を有するため、
結果的に実際にサイリスタバルブの内BPP状態となっ
た相とどちらか一方の制御装置のBPP選択相に不一致
が生じることになる。The control devices 5A and 5B have the same configuration,
The output P due to variations in the characteristics of components used in the control circuits such as the phase control circuits 6A and 6B and variations in adjustment.
It is inevitable that the HS signals have a difference in timing between the control devices 5A and 5B. For example, the control device 5A
The controller 5B selects the R phase as the BPP phase (outputs a PHS signal to 2U, 2X) and selects the S phase as the BPP phase (2V, 2Y).
Output the PHS signal). In this case, PG4 is the PH of control device 5A or 5B.
Because it has a function to select one of the S signals,
As a result, a mismatch occurs between the phase in which the thyristor valve is actually in the BPP state and the BPP selection phase of one of the control devices.
【0008】従って、BPP状態から再起動する場合、
制御装置5Aと制御装置5Bとでは起動相が異るため、
直流電圧の波形が乱れて、直流電流が急増し転流余裕角
不足で転流失敗となり、再起動を行えないため、交直変
換器の稼動率が低下する等電力融通上好ましくない状態
が発生することがあった。Accordingly, when restarting from the BPP state,
Since the starting phases of the control device 5A and the control device 5B are different,
The waveform of the DC voltage is disturbed, the DC current sharply increases, the commutation fails due to insufficient commutation margin angle, and the restart cannot be performed. There was something.
【0009】[0009]
【課題を解決するための手段】本発明は上記目的を達成
するために、位相制御回路の出力信号及びBPP指令信
号が印加され交直変換器のBPP相を決定するBPP相
選択回路と、交直変換器の実際にBPP状態となってい
る相を判別するBPP状態判別回路と、この回路の出力
信号とBPP相選択回路の出力信号が印加され、BPP
相選択回路で選択されたBPP相とBPP状態判別回路
で判別されたBPP相が不一致の場合、BPP相選択回
路で選択されたBPP相をBPP状態判別回路で判別さ
れたBPP相に一致させるBPP相変更回路を備えたこ
とを特徴とする交直変換器の制御装置。In order to achieve the above object, the present invention provides a BPP phase selection circuit for determining a BPP phase of an AC / DC converter to which an output signal of a phase control circuit and a BPP command signal are applied. BPP state discriminating circuit for discriminating a phase that is actually in the BPP state of the detector, and an output signal of this circuit and an output signal of the BPP phase selecting circuit are applied.
When the BPP phase selected by the phase selection circuit does not match the BPP phase determined by the BPP state determination circuit, the BPP phase selected by the BPP phase selection circuit matches the BPP phase determined by the BPP state determination circuit. A control device for an AC / DC converter, comprising a phase change circuit.
【0010】[0010]
【作用】前述のように構成することによって、BPP相
選択回路で選択されたBPP相が異なった場合、交直変
換器の実際にBPP状態となっている相と、いずれかの
BPP相選択回路で選択されたBPP相が不一致とな
る。BPP相選択回路で選択されたBPP相とBPP状
態判別回路で判別されたBPP相が不一致の場合、BP
P相変更回路によって、BPP相選択回路で選択された
BPP相をBPP状態判別回路で判別されたBPP相に
一致させることが出来る。With the above arrangement, when the BPP phase selected by the BPP phase selection circuit is different, the phase in which the AC / DC converter is actually in the BPP state and the BPP phase selection circuit in one of the BPP phase selection circuits are different. The selected BPP phases do not match. If the BPP phase selected by the BPP phase selection circuit and the BPP phase determined by the BPP state determination circuit do not match, the BP
The BPP phase selected by the BPP phase selection circuit can be made to coincide with the BPP phase determined by the BPP state determination circuit by the P phase change circuit.
【0011】従って、多重構成された制御装置が異るB
PP相を選択したとしても実際にサイリスタバルブがB
PP状態となった相に制御装置のBPP相を一致させる
ことができるため、BPP状態からの再起動時、直流電
圧の乱れによる電流急変により転流余裕角不足で転流失
敗し、起動出来ないことを防止出来る。Therefore, the multiplexed control devices have different B
Even if the PP phase is selected, the thyristor valve is actually B
Since the BPP phase of the control device can be made to coincide with the phase in the PP state, commutation fails due to insufficient commutation margin angle due to a sudden change in current due to disturbance of the DC voltage upon restarting from the BPP state, and the apparatus cannot be started. Can be prevented.
【0012】[0012]
【実施例】以下本発明の、一実施例を図面を参照して説
明する。図1は本発明の一実施例を構成図であり、図3
と同じ機能を遂行する装置には同一符号を付してその説
明は省略、ここでは異なる点を説明する。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
Devices that perform the same functions as those described above are denoted by the same reference numerals, and description thereof will be omitted. Here, different points will be described.
【0013】各サイリスタバルブより導通状態であるが
否かを確認するためのモニタ信号9をPG4に入力す
る。この信号により、どのバルブ相がBPP状態である
かを判別するBPP状態判別回路11により、どのバル
ブ相がBPP状態であるかを制御装置5A,5Bに出力
する。制御装置5A,5Bではこの信号をBPP相変更
回路10A,10Bに入力し、BPP相選択回路7A,
7Bにより選択されたBPP相を変更する構成である。A monitor signal 9 for checking whether or not the thyristor valve is conductive is input to each PG4. Based on this signal, the BPP state determination circuit 11 that determines which valve phase is in the BPP state outputs to the control devices 5A and 5B which valve phase is in the BPP state. Controllers 5A and 5B input this signal to BPP phase change circuits 10A and 10B, and output the signals to BPP phase selection circuits 7A and 10B.
This is a configuration for changing the BPP phase selected by 7B.
【0014】図2に制御装置5A側のBPP相変更回路
10Aの一実施例を示す。尚、制御装置5B側のBPP
相変更回路10Bも同一構成となっているので、その説
明は省略する。FIG. 2 shows an embodiment of the BPP phase change circuit 10A on the control device 5A side. The BPP on the control device 5B side
Since the phase change circuit 10B has the same configuration, the description thereof will be omitted.
【0015】BPP相変更回路10Aは、一方の入力端
子にBPP相選択回路7AからのR相選択信号、S相選
択信号、T相選択信号がそれぞれ印加され、他方の入力
端子にBPP状態判別回路11からのR相BPP状態信
号、S相BPP状態信号T相BPP状態信号がそれぞれ
印加されるオア回路4A1、4B1、4C1及びBPP
状態判別回路11からのS相BPP状態信号とT相BP
P状態信号が印加されるオア回路4A2と、R相BPP
状態信号とT相BPP状態信号が印加されるオア回路4
B2と、R相BPP状態信号とS相BPP状態信号が印
加されるオア回路4C2と、更にオア回路4A1でセッ
トされオア回路4A2でリセットされるフリップフロッ
プ3A、オア回路4B1でセットされオア回路4B2で
リセットされるフリップフロップ3B、オア回路4C1
でセットされオア回路4C2でリセットされるフリップ
フロップ3Cで構成される。The BPP phase change circuit 10A has one input terminal to which an R phase selection signal, an S phase selection signal, and a T phase selection signal from the BPP phase selection circuit 7A are applied, and a BPP state determination circuit to the other input terminal. OR circuits 4A1, 4B1, 4C1 and BPP to which the R-phase BPP status signal, the S-phase BPP status signal and the T-phase BPP status signal from
The S-phase BPP state signal from the state determination circuit 11 and the T-phase BP
OR circuit 4A2 to which a P state signal is applied, and R-phase BPP
OR circuit 4 to which a state signal and a T-phase BPP state signal are applied
B2, an OR circuit 4C2 to which the R-phase BPP state signal and the S-phase BPP state signal are applied, a flip-flop 3A set by the OR circuit 4A1 and reset by the OR circuit 4A2, and an OR circuit 4B2 set by the OR circuit 4B1 3B, OR circuit 4C1
And the flip-flop 3C reset by the OR circuit 4C2.
【0016】多重化された制御装置5A,5Bは同一構
成であるものの両者の間には、特性上の差異があるた
め、各々の出力信号であるPHS信号にはバラツキが生
じる。従って、結果的にBPP選択相に差異を生じるこ
ととなる。ところが、サイリスタバルブ2U〜2Zは1
台であるため、実際には制御装置5A,5Bのいずれか
一方のタイミングで制御される。そこで、サイリスタバ
ルブの状態をモニタ信号でモニタし、これをPG4内の
BPP状態判別回路11に入力し、どの相がBPP状態
であるかを判別する。制御装置5A,5B内のBPP相
変更回路10A,10Bに、このBPP状態信号を入力
することにより、各制御装置5A,5Bにて選択された
BPP相を変更し、実際のBPP状態の相を一致させる
ことができる。Although the multiplexed control devices 5A and 5B have the same configuration, there is a difference in characteristics between them, so that the PHS signals as output signals vary. Therefore, as a result, a difference occurs in the BPP selection phase. However, the thyristor valves 2U to 2Z are 1
Since the stage is a stand, it is actually controlled at one of the timings of the control devices 5A and 5B. Therefore, the state of the thyristor valve is monitored with a monitor signal, and the monitored signal is input to the BPP state determination circuit 11 in the PG 4 to determine which phase is in the BPP state. By inputting this BPP state signal to the BPP phase change circuits 10A and 10B in the control devices 5A and 5B, the BPP phase selected by each of the control devices 5A and 5B is changed, and the phase in the actual BPP state is changed. Can be matched.
【0017】即ち、図1において、制御装置5AのBP
P相選択回路7AはR相を選択し、制御装置5BのBP
P相選択回路7BはS相を選択したとすれば、図2にお
いてBPP相変更回路10AはR相BPP相選択信号を
出力し、図示しないBPP相変更回路10BはS相BP
P相選択信号を出力することになる。この結果制御装置
5AはPG4にR相をBPPにするようなPHS信号を
指令し、制御装置5BはPG4にS相をBPPにするよ
うなPHS信号を指令する。このときPG4では、制御
装置5Bの信号を選択したとすれば交直変換器はS相が
BPP状態となる。That is, in FIG. 1, the BP of the control device 5A is
The P-phase selection circuit 7A selects the R-phase, and the BP of the control device 5B
Assuming that P-phase selection circuit 7B has selected the S-phase, in FIG. 2, BPP phase change circuit 10A outputs an R-phase BPP phase selection signal, and a BPP phase change circuit 10B (not shown) outputs an S-phase BP.
A P-phase selection signal will be output. As a result, the control device 5A instructs the PG4 to issue a PHS signal for changing the R phase to BPP, and the control device 5B instructs the PG4 to issue a PHS signal for changing the S phase to BPP. At this time, in the PG4, if the signal of the control device 5B is selected, the S-phase of the AC / DC converter is in the BPP state.
【0018】BPP状態判別回路11は交直変換器のS
相がBPP状態となったことを判別しBPP相変更回路
10A及び10Bに、S相BPP状態信号を印加する。
BPP相変更回路10Aは、S相BPP状態信号が印加
されるとフリップフロップ回路3Aの出力が「1」、3
Bが「0」、3Cが「0」の状態からオア回路4A2の
出力が「1」となり、フリップフロップ回路3Aの出力
は「0」、オア回路4B1の出力が「1」となり、フリ
ップフロップ3Bの出力が「1」、オア回路4C2の出
力が「1」となり、フリップフロップ3Cの出力が
「0」となり、S相のBPP状態信号と、BPP選択回
路により選択されたBPP相を一致させることが可能と
なる。The BPP state determination circuit 11 uses the S
It is determined that the phase is in the BPP state, and the S-phase BPP state signal is applied to the BPP phase change circuits 10A and 10B.
When the S-phase BPP state signal is applied, the output of the flip-flop circuit 3A becomes “1”,
When B is "0" and 3C is "0", the output of the OR circuit 4A2 becomes "1", the output of the flip-flop circuit 3A becomes "0", the output of the OR circuit 4B1 becomes "1", and the flip-flop 3B Is "1", the output of the OR circuit 4C2 is "1", the output of the flip-flop 3C is "0", and the SPP BPP state signal matches the BPP phase selected by the BPP selection circuit. Becomes possible.
【0019】この時、図示しないBPP相変更回路10
BにもS相BPP状態信号が印加されるが、もともと、
BPP相変更回路10BはS相BPP相選択信号を出力
しているため、BPP相変更回路10Bの出力は変化し
ない。At this time, a BPP phase change circuit 10 (not shown)
The S phase BPP state signal is also applied to B, but originally,
Since the BPP phase change circuit 10B outputs the S phase BPP phase selection signal, the output of the BPP phase change circuit 10B does not change.
【0020】前述説明では、制御装置は2重系、パルス
発生装置は1重系として説明したが制御装置が3重系以
上の多重系、パルス発生装置が2重系以上の多重系とし
も同様に実施できるものである。In the above description, the control device is described as a double system, and the pulse generator is described as a single system. However, the same applies when the control device is a multiplex system of three or more systems and the pulse generator is a multiplex system of two or more systems. It can be implemented in
【0021】[0021]
【発明の効果】以上説明のように本発明によれば、多重
系された制御装置が異るBPP相を選択したとしても実
際にサイリスタバルブがBPP状態となった相に制御装
置のBPP相を一致させることができるため、BPP状
態からの再起動時、直流電圧の乱れによる電流急変によ
り転流余裕角不足で転流失敗し、起動出来ないことを防
止し、円滑な再起動を可能とし、このため交直変換器の
稼動率を向上させることができ、電力融通の信頼性を向
上できる。As described above, according to the present invention, even if the multiplexed control device selects a different BPP phase, the BPP phase of the control device is changed to the phase in which the thyristor valve is actually in the BPP state. Since it is possible to match, when restarting from the BPP state, commutation failure due to insufficient commutation margin angle due to sudden change in current due to DC voltage disturbance, preventing that it can not be started, enabling smooth restart, Therefore, the operation rate of the AC / DC converter can be improved, and the reliability of power interchange can be improved.
【図1】本発明の一実施例を示す交直変換器の制御装置
の構成図。FIG. 1 is a configuration diagram of a control device of an AC / DC converter according to an embodiment of the present invention.
【図2】図1のバイパスペアリセット回路の具体的一例
を示すブロック図。FIG. 2 is a block diagram showing a specific example of a bypass pair reset circuit of FIG. 1;
【図3】従来の交直変換器の制御装置の構成図。FIG. 3 is a configuration diagram of a control device for a conventional AC / DC converter.
1 …DCリアクトル 2U〜2Z…
サイリリスタバルブ 3 …変換器用変圧器 4…
パルス発生装置 5A,5B …制御装置 6A,6B…
位相制御回路 7A,7B …BPP相選択回路 8H,8L…
点弧パルス用信号線 9 …バルブモニタ信号 10A,10B…
BPP相変更回路 11 …BPP状態判別回路1 ... DC reactor 2U-2Z ...
Thyristor valve 3… Transformer transformer 4…
Pulse generators 5A, 5B ... Control devices 6A, 6B ...
Phase control circuit 7A, 7B ... BPP phase selection circuit 8H, 8L ...
Signal line for firing pulse 9… Valve monitor signal 10A, 10B…
BPP phase change circuit 11 ... BPP state determination circuit
Claims (1)
交直変換器を構成するサイリスタバルブの点弧位相を制
御する位相制御回路と、交直変換器のバイパスペア相を
決定するバイパスペア相選択回路を有し、当該制御装置
を少くとも2組具備した多重構成の制御装置を備えた交
直変換器の制御装置において、前記交直変換器の実際に
バイパスペア状態となっている相を判別するバイパスペ
ア状態判別手段と、前記制御装置のバイパスペア相選択
回路の選択相をバイパスペア状態判別手段で判別した相
に変更するバイパスペア相変更手段を具備したことを特
徴とする交直変換器の制御装置。A control device for controlling an AC / DC converter includes:
A multiplex system having a phase control circuit for controlling the firing phase of a thyristor valve constituting an AC / DC converter, and a bypass pair phase selecting circuit for determining a bypass pair phase of the AC / DC converter, and comprising at least two sets of the control devices. In a control device for an AC / DC converter provided with a control device having a configuration, a bypass pair state determining means for determining a phase of the AC / DC converter that is actually in a bypass pair state; and a bypass pair phase selection circuit of the control device. A control device for an AC / DC converter, comprising: bypass pair phase changing means for changing a selected phase to a phase determined by a bypass pair state determining means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3194670A JP2894651B2 (en) | 1991-08-05 | 1991-08-05 | Control device for AC / DC converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3194670A JP2894651B2 (en) | 1991-08-05 | 1991-08-05 | Control device for AC / DC converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0549162A JPH0549162A (en) | 1993-02-26 |
JP2894651B2 true JP2894651B2 (en) | 1999-05-24 |
Family
ID=16328356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3194670A Expired - Fee Related JP2894651B2 (en) | 1991-08-05 | 1991-08-05 | Control device for AC / DC converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2894651B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107132791B (en) * | 2017-04-24 | 2020-10-30 | 许继电气股份有限公司 | Converter valve control device |
-
1991
- 1991-08-05 JP JP3194670A patent/JP2894651B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0549162A (en) | 1993-02-26 |
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