JP3263281B2 - Control method of inverter device - Google Patents
Control method of inverter deviceInfo
- Publication number
- JP3263281B2 JP3263281B2 JP17169695A JP17169695A JP3263281B2 JP 3263281 B2 JP3263281 B2 JP 3263281B2 JP 17169695 A JP17169695 A JP 17169695A JP 17169695 A JP17169695 A JP 17169695A JP 3263281 B2 JP3263281 B2 JP 3263281B2
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- Japan
- Prior art keywords
- power
- active power
- amount
- load
- compensation
- Prior art date
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- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、２つの交流電源系統に
直流回路を共通接続した２つのインバータを接続し、有
効電力を２つの系統間で融通しながら無効電力をも補償
するインバータ装置の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device which connects two inverters each having a DC circuit commonly connected to two AC power supply systems, and also compensates for reactive power while accommodating active power between the two systems. It relates to a control method.
【０００２】[0002]
【従来の技術】図１に、スコット変圧器１の２次側のＴ
座，Ｍ座からの単相２系統２T，２Mの無効電力補償と有
効電力融通を行うインバータ装置（ＳＶＧ）３を示す。
このインバータ装置３は、１系（Ｔ座）２T及び２系
（Ｍ座）２Mに交流側が接続され、直流側が共通に接続
されたインバータ３T，３Mから構成されている。2. Description of the Related Art FIG.
1 shows an inverter device (SVG) 3 that performs reactive power compensation and active power interchange of single-phase two-systems 2 T and 2 M from the M and L positions.
This inverter device 3 is composed of inverters 3 T and 3 M whose AC side is connected to the first system (T seat) 2 T and the second system (M seat) 2 M, and whose DC side is connected in common.
【０００３】この交流系統２T及び２Mの無効電力ＱT及
びＱMと有効電力ＰT及びＰMを検出してインバータ装置
３を以下の制御をすれば、図２に示すように３相系統側
の無効電力は低減し、更に有効電力は平衡化する。[0003] If the control of the inverter device 3 detects the reactive power Q T and Q M and the active power P T and P M of the AC system 2 T and 2 M or less, 3-phase, as shown in FIG. 2 The reactive power on the grid side is reduced, and the active power is further balanced.
【０００４】１）無効電力補償は、それぞれの座に対す
るインバータの電圧制御で行う。[0004] 1) Reactive power compensation is performed by voltage control of an inverter for each seat.
【０００５】２）有効電力融通は、２つの座の有効電力
差を検出して、その半分の量を各インバータの位相制御
で行う。[0005] 2) In the active power interchange, the active power difference between the two seats is detected, and half the amount is controlled by the phase control of each inverter.
【０００６】従来、インバータ装置３による有効電力の
融通及び無効電力補償は図８に示すように、それぞれ系
統の負荷電圧ＶT（ＶM），負荷電流ＩT（ＩM）から有効
電力融通量及び無効電力補償量を有効電力補償量検出回
路５，無効電力補償量検出回路６にて検出し、その有効
電力補償量，無効電力補償量を１００％設定のリミッタ
７及び８を介して有効電力指令Ｐ＊及び無効電力指令Ｑ
＊を出力させ、インバータ３T（３M）を位相（又は周波
数）制御及び電圧制御して行っている。リミッタ回路７
及び８は負荷が装置の定格出力容量を越えても装置が過
負荷とならないように有効電力及び無効電力の出力を制
限するものである。Conventionally, flexible and reactive power compensation of active power by the inverter device 3, as shown in FIG. 8, the load voltage V T (V M) of each line, effective power interchange amount from the load current I T (I M) And the reactive power compensation amount is detected by the active power compensation amount detection circuit 5 and the reactive power compensation amount detection circuit 6, and the active power compensation amount and the reactive power compensation amount are detected by the active power compensation via limiters 7 and 8 which are set to 100%. Command P * and reactive power command Q
* Is output and the inverter 3 T (3 M ) is controlled by phase (or frequency) control and voltage control. Limiter circuit 7
And 8 limit the output of active power and reactive power so that the device will not be overloaded even if the load exceeds the rated output capacity of the device.
【０００７】[0007]
【発明が解決しようとする課題】上記従来インバータ装
置は、有効電力及び無効電力について、それぞれリミッ
タを設けているため、単独の過大な負荷については装置
が過負荷となることはない。しかし、図４（ｂ）に示す
ように、有効・無効電力負荷が同時に入ってきた場合、
それぞれの電力量が装置定格（１００％）以内であって
も、合成した装置出力電力が装置定格を越えてしまうこ
とがあり、過負荷を防ぐことができない。In the conventional inverter device, limiters are provided for the active power and the reactive power, respectively, so that the device will not be overloaded with a single excessive load. However, as shown in FIG. 4 (b), when active and reactive power loads come in at the same time,
Even if the respective power amounts are within the device rating (100%), the combined device output power may exceed the device rating, and overload cannot be prevented.
【０００８】また、このような装置において、負荷が通
常の場合の最大の不平衡は、図９（ａ）に示すように、
片座が無負荷で反対座が定格負荷の場合となり、不平衡
量は負荷定格１００％、ＳＶＣ装置の補償量としては負
荷定格の±５０％が最大値となる。In such a device, the maximum imbalance when the load is normal is as shown in FIG.
One seat has no load and the opposite seat has a rated load. The unbalance amount is 100% of the load rating, and the maximum value of the compensation amount of the SVC device is ± 50% of the load rating.
【０００９】しかし、図９（ｂ）に示すように負荷が車
輛などの場合、回生運転などにより、負荷が有効電力を
取り込むだけでなく、有効電力を吐き出すような場合が
ある。この場合、一方が負荷定格の＋１００％（通常の
負荷）、反対側が−１００％（回生モード）となること
があり、この場合は不平衡量が２００％で負荷定格の２
倍となり、インバータ装置の補償量も従来の負荷の２増
に増加してしまい、インバータ装置の負担が増加してし
まう。However, when the load is a vehicle or the like as shown in FIG. 9B, the load may not only take in the active power but also discharge the active power due to regenerative operation or the like. In this case, one side may be + 100% of the load rating (normal load) and the other side may be -100% (regenerative mode). In this case, the unbalance amount is 200% and the load rating is 2%.
As a result, the compensation amount of the inverter device also increases to twice the conventional load, and the load on the inverter device increases.
【００１０】本発明は、従来のこのような問題点に鑑み
てなされたものであり、その目的とするところは、有効
電力の融通と無効電力補償をするインバータ装置におい
て、有効電力融通量ないし無効電力補償量に最適なリミ
ッタをかけて出力容量が定格を越えることのないように
するインバータ装置の制御方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an inverter device for accommodating active power and compensating for reactive power. An object of the present invention is to provide a control method of an inverter device that prevents an output capacity from exceeding a rating by applying an optimum limiter to a power compensation amount.
【００１１】[0011]
【課題を解決するための手段及び作用】上記目的を達成
するために、本発明は、スコット変圧器２次側の２つの
単相交流電源系統間に直流回路を共通に接続した２つの
インバータを接続し、有効電力を２つの系統間で融通し
ながら無効電力を補償するインバータ装置の制御におい
て、 （１）有効電力及び無効電力の補償量をそれぞれ装置定
格（１００％）で制限する２つのリミッタを設け、リミ
ッタからの有効電力と無効電力の補償量のどちらか一方
を優先させて制御し、優先させる無効電力又は有効電力
の補償量（％）の２乗を求め、これを装置定格（１００
％）から引き、更にその結果の平方根を求め、求めた信
号が優先制御させない他方の補償量より大きければその
まま補償し、小さければ他方の補償量を制限するリミッ
タの制限値を変更して、有効電力と無効電力の補償量の
ベクトル和が装置定格以上の補償量とならないようにし
たものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides two Scott transformer secondary sides .
In the control of an inverter device that connects two inverters having a DC circuit commonly connected between a single-phase AC power supply system and compensates for reactive power while accommodating active power between the two systems, (1) active power and reactive power Two limiters are provided, each of which limits the amount of power compensation by a device rating (100%), and one of the active power and the reactive power compensation amounts from the limiter is prioritized and controlled, and the reactive power or active power to be prioritized Squared of the compensation amount (%) of the
%), And further obtains the square root of the result. If the obtained signal is larger than the other compensation amount that is not controlled by priority, the compensation is performed as it is. This is such that the vector sum of the compensation amounts of the electric power and the reactive power does not exceed the device rating.
【００１２】（２）または、検出量を通常の有効電力負
荷の場合は＋信号，回生負荷の場合は−信号として、負
荷の有効電力をそれぞれの座で独立に検出し、各検出量
の上限を装置定格（１００％）とし下限を定格の０％に
制限する各リミッタにかけ、リミッタをかけたそれぞれ
の座の有効電力検出量から不平衡量を計算してその結果
を有効電力補償量とし、回生負荷が生じても補償量が増
加することのないようにしたものである。(2) Alternatively, the detected power is detected as a plus signal in the case of a normal active power load and a negative signal in the case of a regenerative load, and the active power of the load is independently detected at each position, and the upper limit of each detected amount is detected. Is set to the device rating (100%) and the lower limit is limited to 0% of the rating. Each limiter is applied to the limiter. Even if a load occurs, the amount of compensation does not increase.
【００１３】（３）あるいは、各系統の無効電力を無効
電力補償指令量とすると共に、両系統の有効電力差の半
分を有効電力融通指令量とし、これらの指令量のベクト
ル和が装置の定格を越えないようにそれぞれ指令値にリ
ミッタをかけ、それぞれの指令値のリミッタの配分は負
荷の力率の悪さに応じて無効電力補償量に重みづけして
有効電力融通量を低減させた固定配分量とし、いかなる
負荷でも装置定格以内で運転しうるようにしたものであ
る。(3) Alternatively, the reactive power of each system is used as a reactive power compensation command amount, and a half of the active power difference between the two systems is used as an active power interchange command amount. Limiter is applied to each command value so that it does not exceed the fixed value, and the distribution of the limiter for each command value is weighted to the reactive power compensation amount according to the poor power factor of the load, and the fixed distribution reduces the amount of active power interchange It is designed to operate at any load within the equipment rating.
【００１４】[0014]
【実施例】本発明の実施例について図面を参照して説明
する。Embodiments of the present invention will be described with reference to the drawings.
【００１５】実施例１（図３） 図３は従来の技術で説明した図１のインバータ装置３を
無効電力優先で制御する無効電力優先制御回路を示す。
図３において、５及び６は、それぞれ１系２T（２系
２M）の負荷電圧ＶT（ＶM），負荷電流ＩT（ＩM）から
インバータ３T（３M）の補償量を検出する有効電力補償
量検出回路及び無効電力補償量検出回路、７’及び８
は、それぞれ補償量検出回路５及び６から出力される有
効電力補償量及び無効電力補償量にリミッタをかけ有効
電力指令値Ｐ＊及び無効電力指令値Ｑ＊を出力する上限
１００％の可変形リミッタ及び上限１００％のリミッ
タ。Embodiment 1 (FIG. 3) FIG. 3 shows a reactive power priority control circuit for controlling the inverter device 3 shown in FIG.
3, 5 and 6, the load voltage V T of 1 system 2 T (2 system 2 M) (V M), the compensation amount of the load current I T (I M) from the inverter 3 T (3 M) Active power compensation amount detection circuit and reactive power compensation amount detection circuit to detect, 7 'and 8
Is a 100% upper limit variable limiter that limits the active power compensation amount and the reactive power compensation amount output from the compensation amount detection circuits 5 and 6 and outputs the active power command value P * and the reactive power command value Q *, respectively. And an upper limit of 100%.
【００１６】[0016]
【数１】 (Equation 1)
【００１７】１０は、（１）式の演算を行って無効電力
優先で有効電力（装置余力）を求めて可変形リミッタ
７’のリミット値を変える装置余力演算回路で、リミッ
タ８からの無効電力指令値Ｑ＊（Ｘ％）を２乗する２乗
演算器１１と装置定格の２乗（１００％）2から２乗演
算値Ｘ2を引く減算器１２と減算器１２からの値〔（１
００％）2−Ｘ2〕の平方根を求める平方根演算器１３に
より構成されている。Numeral 10 is a device remaining power calculating circuit for calculating the active power (device remaining power) with priority given to the reactive power by performing the operation of equation (1) and changing the limit value of the variable limiter 7 '. A square calculator 11 for squaring the command value Q * (X%), a subtractor 12 for subtracting the square calculation value X 2 from the square (100%) 2 of the device rating, and a value [(1
00%) 2 −X 2 ].
【００１８】以上のように、装置余力演算回路１０によ
り１００％リミット回路８からの無効電力指令値Ｑ＊を
優先に、無効電力指令値Ｑ＊と有効電力指令値Ｐ＊のベ
クトル合成値が最大１００％となる装置余力を演算し
て、その演算結果により可変形リミッタ７’のリミット
値を変更して有効電力指令値Ｐ＊を出力させているの
で、インバータ装置３にて制御される有効電力と無効電
力のベクトル和は図４（Ａ）に示すように装置容量を越
えることがない。As described above, the reactive power command value Q * from the 100% limit circuit 8 is given priority by the device remaining power calculation circuit 10, and the vector composite value of the reactive power command value Q * and the active power command value P * is maximized. Since the apparatus remaining power which becomes 100% is calculated, and the limit value of the variable limiter 7 'is changed to output the active power command value P * according to the calculation result, the active power controlled by the inverter apparatus 3 is output. 4A does not exceed the device capacity as shown in FIG.
【００１９】したがって、１系又は２系に有効電力負荷
と無効電力負荷が同時に入ってきてもインバータ装置が
過負荷になることはない。Therefore, even if the active power load and the reactive power load enter the system 1 or 2 simultaneously, the inverter device is not overloaded.
【００２０】なお、有効電力補償検出回路５からの有効
電力補償量が装置余力演算回路１０で求めた有効電力よ
り小さければ、リミッタ７’で制限されることなく、そ
のまま補償される。If the active power compensation amount from the active power compensation detection circuit 5 is smaller than the active power obtained by the remaining power calculation circuit 10, the compensation is performed without limitation by the limiter 7 '.
【００２１】上記実施例１では無効電力優先制御の例で
あるが、同様に有効電力優先制御とすることができるこ
とはいうまでもない。Although the first embodiment is an example of the reactive power priority control, it goes without saying that the active power priority control can be similarly performed.
【００２２】実施例２（図５） 図５は図１に示したインバータ装置３を回生負荷時に過
負荷とならないように制御する有効電力補償量検出回路
を示す。図５において、５1及び５2は１系２Tの電圧，
電流ＶT，ＩT及び２系２Mの電圧，電流ＶM，ＩMから１
系及び２系の有効電力ＰT及びＰMを検出する有効電力検
出回路。Embodiment 2 (FIG. 5) FIG. 5 shows an active power compensation amount detection circuit for controlling the inverter device 3 shown in FIG. 1 so as not to be overloaded during a regenerative load. In FIG. 5, 5 1 and 5 2 are the voltage of 1 T of 2 system,
Current V T, I T and 2 system 2 M voltage, current V M, from I M 1
Systems and 2 system active power P T and active power detection circuit for detecting the P M of.
【００２３】７1及び７2は有効電力検出回路５1及び５2
からの有効電力信号がプラスの通常有効電力の場合はイ
ンバータ装置３の定格の１００％に制限し、マイナスの
回生有効電力の場合は定格の０％に制限する上限１００
％，下限０％のリミッタ。7 1 and 7 2 are active power detection circuits 5 1 and 5 2
Is limited to 100% of the rating of the inverter device 3 when the active power signal is positive normal active power, and is limited to 0% of the rating when the active power signal is negative regenerative active power.
%, Lower limit 0% limiter.
【００２４】１５はリミッタ７1と７2からの有効電力値
の差を検出する減算器、１６はこの減算器からの差信号
を１／２にして１系有効電力補償量を出力する１／２演
算器、１７は演算器１６の出力を反転させて２系有効電
力補償量を出力する極性反転器である。Reference numeral 15 denotes a subtractor for detecting the difference between the active power values from the limiters 7 1 and 7 2. Reference numeral 16 denotes a 1/1 which halves the difference signal from the subtracter to output the active power compensation amount for the first system. The two operation units 17 are polarity inverters that invert the output of the operation unit 16 and output the amount of active power compensation for the second system.
【００２５】以上のように有効電力指令回路が構成され
ているので、１系，２系の負荷が通常負荷の場合は、有
効電力検出回路５1，５2の出力信号ＰT，ＰMはプラスで
あるので、有効電力ＰT，ＰMが定格の１００％以内であ
ればそのまま１００％を越えていればリミッタ７1，７2
により１００％に制限され、減算器１５によりその差Ｐ
T−ＰMが検出され、演算器１６で１／２に割られて１系
補償量（インバータ３Tの有効電力指令）（ＰT−ＰM）
／２となる。また、この演算器１６からの出力は極性反
転器１７で反転されて２系補償量（インバータ３Mの有
効電力指令）−（ＰT−ＰM）／２となる。したがって、
この有効電力指令によりインバータ３T，３Mを制御する
ことにより、図２に示す有効電力の平衡化ができる。[0025] Since the active power command circuit configured as described above, the system 1, if 2 system load of the normal load, the effective power detecting circuit 5 1, 5 2 of the output signal P T, P M is since plus, active power P T, if beyond it 100% if P M is within 100% of the rating limiter 7 1, 7 2
To 100%, and the difference P
T -P M is detected, the system 1 compensation amount is divided to 1/2 by the arithmetic unit 16 (active power command of the inverter 3 T) (P T -P M )
/ 2. Further, the output from the calculator 16 is 2-based compensation amount is inverted by polarity inverter 17 (power command of the inverter 3 M) - a (P T -P M) / 2 . Therefore,
By controlling the inverters 3 T and 3 M according to this active power command, the active power shown in FIG. 2 can be balanced.
【００２６】また、１系，２系の負荷の一方が通常の負
荷，他方が回生負荷の場合、例えば１系が通常負荷２系
が回生負荷の場合は、有効電力検出回路５1の出力信号
ＰTはプラスであるので、有効電力ＰTが定格の１００％
以内であればそのまま、１００％を越えていればリミッ
タ７1により１００％に制限されて減算器１５に入力す
る。一方、有効電力検出回路５2の出力信号ＰMはマイナ
スとなるので、リミッタ７2の下限リミット値０％に制
限されるので、リミッタ７2から減算器１５への入力は
０となる。このため減算器１５の出力はＰTとなり演算
器１６からの１系補償量はＰT／２となる。また極性反
転器１７からの２系補償量は−ＰM／２となる。Further, the system 1, 2 system load of one normal load, the other is regenerative load, if for example, 1-system is normal load 2 based regenerative load, the effective power detecting circuit 5 first output signal Since PT is positive, active power PT is 100% of rating
If it is within it, it is limited by the limiter 71 if exceeding 100% to 100% input to the subtractor 15. On the other hand, the output signal P M of active power detecting circuit 5 2 Since the negative, because it is limited to the lower limit value of 0% of the limiter 7 2, input from the limiter 7 2 to the subtractor 15 becomes zero. The output of this for the subtractor 15 1 system compensation amount from the P T becomes calculator 16 becomes P T / 2. Further, the amount of compensation of the two systems from the polarity inverter 17 is -P M / 2.
【００２７】したがって、回生負荷分を無視して一般的
な負荷分の不平衡分だけを検出した有効電力の平衡化制
御ができる。このためインバータ装置が回生負荷により
過負荷となることはなくなる。[0027] Accordingly, it is balancing control of active power detected only general load-unbalance amount by ignoring the regenerative load component. Therefore, the inverter device is not overloaded by the regenerative load.
【００２８】実施例３（図６，図７） 図６は図１に示したインバータ装置３を負荷の状況から
無効電力補償量と有効電力融通量に最適なリミッタをか
けて出力容量が定格を越えないように制御する有効，無
効電力指令回路を示す。Embodiment 3 (FIGS. 6 and 7) FIG. 6 shows that the inverter device 3 shown in FIG. 1 is rated for output capacity by applying an optimum limiter to a reactive power compensation amount and an active power interchange amount based on a load condition. Indicates the active / reactive power command circuit that controls so as not to exceed.
【００２９】図６において、２１Tは１系２Tの負荷電圧
ＶT，電流ＩTから１系の無効電力ＱｄT，有効電力ＰｄT
を検出する無効・有効電力検出回路、２１Tは２系２Mの
負荷電圧ＶM，電流ＩMから２系の無効電力ＱｄM，有効
電力ＰｄMを検出する無効・有効電力検出回路、２２T及
び２２Mは検出した無効電力ＱｄT及びＱｄMを制限する
リミッタ、２３は検出した有効電力ＰｄT，ＰｄMの差を
求める減算器、２４は減算器からの有効電力の平均を求
める１／２演算器、２５は演算器２４からの有効電力平
均値を制限するリミッタ、２７Tはリミッタ２２T及び２
５からの無効電力ＱｄT及び有効電力（ＰｄT−ＰｄM）
／２を無効電力補償指令及び有効電力融通指令としてイ
ンバータ３Tを制御する１系インバータ制御回路、２７M
はリミッタ２２M及び２５からの無効電力ＱｄM及び有効
電力（ＰｄT−ＰｄM）／２を無効電力補償指令及び有効
電力融通指令としてインバータ３Mを制御する２系イン
バータ制御回路である。[0029] In FIG. 6, 21 T 1 system 2 T of the load voltage V T, the reactive power Qd T 1 system from the current I T, active power Pd T
Reactive-active power detection circuit for detecting, 21 T 2 system of 2 M load voltage V M, the current reactive power Qd M 2 system from I M, disabled-active power detection circuit for detecting an active power Pd M, 22 T and 22 M are limiters that limit the detected reactive powers Qd T and Qd M , 23 is a subtractor that calculates the difference between the detected active powers Pd T and Pd M , and 24 is an average that calculates the average of the active powers from the subtractors. / 2 calculator, a limiter 25 for limiting the active power average value from calculator 24, 27 T limiter 22 T and 2
Reactive power Qd T and active power from 5 (Pd T -Pd M )
/ 1 system inverter control circuit for controlling the inverter 3 T 2 as reactive power compensation instruction and the effective power interchange command, 27 M
Is a 2-system inverter control circuit for controlling the inverter 3 M reactive power Qd M and active power (Pd T -Pd M) / 2 as a reactive power compensation instruction and the effective power interchange command from limiter 22 M and 25.
【００３０】しかして、２つの系統間２T，２M間では図
７に示すように無効電力が補償されると共に有効電力が
融通する。Thus, between the two systems 2 T and 2 M , as shown in FIG. 7, the reactive power is compensated and the active power is exchanged.
【００３１】ここで、リミッタ２２T，２２M，２５を無
効電力補償量と有効電力融通量に最適なリミッタをかけ
インバータ装置３の出力容量が定格を越えないように、
最適リミット値に設定する。Here, the limiters 22 T , 22 M and 25 are optimally limited to the reactive power compensation amount and the active power interchange amount so that the output capacity of the inverter device 3 does not exceed the rating.
Set the optimal limit value.
【００３２】最適リミット値について、電気鉄道負荷は
力率が０．７〜０．８５程度の車両が多い。系統やき電
母線の電圧が降下する大きな要素は遅れ成分の電流によ
るリアクタンス降下である。また、有効成分の電流は遅
れ成分の電流程電圧降下は生じないが、系統の三相側の
電流不平衡に大きな影響を与える。このため無効電力補
償量を有効電力融通量より大きくした方が電圧効果対策
には効果があり、不平衡対策にはさほど効果がない。Regarding the optimum limit value, many electric railway loads have a power factor of about 0.7 to 0.85. A major factor in the voltage drop of the system and the feeder bus is the drop in reactance due to the current of the delay component. Although the current of the effective component does not cause a voltage drop as much as the current of the delay component, it has a large effect on the current imbalance on the three-phase side of the system. For this reason, making the reactive power compensation amount larger than the active power interchange amount is effective for the voltage effect countermeasure, and is not so effective for the unbalance countermeasure.
【００３３】したがって、力率が悪い車両が走行したと
き力系統及びき電母線に最も悪影響を与える。このた
め、この悪い条件でインバータ装置３の出力が定格以内
となるように制御指令に最適なリミッタをかければ、力
率の良い負荷に対しては問題は発生しない。Therefore, when a vehicle having a poor power factor travels, the power system and the feeder bus are most adversely affected. For this reason, if an optimum limiter is applied to the control command so that the output of the inverter device 3 is within the rating under the bad condition, no problem occurs for a load having a good power factor.
【００３４】負荷の大きさが１００％でしかも力率が最
も悪い状態（力率０．７）で車両が片座に走行したとす
れば、有効電力は７０％，無効電力は７１．４％とな
る。[0034] if a 100% size addition the power factor of the load is a vehicle, Great <br/> bad state (power factor 0.7) has traveled into pieces seat, active power 70%, reactive power Is 71.4%.
【００３５】このときインバータ装置３の扱う容量は次
のようになる。At this time, the capacity handled by the inverter device 3 is as follows.
【００３６】・有効電力融通量＝３５％（７０％÷２）
→Ｐ0＝（１００×０．７／２） ・無効電力補償量＝７１．４％→Ｑ0＝１００×√（１
−０．７2） ・装置容量＝√（３５2＋７１．４2）＝７９．５％→√
（Ｐ0 2＋Ｑ0 2） ・装置容量に対する有効電力融通量の比率Ｋ1≒０．４
４→Ｐ0／√（Ｐ0 2＋Ｑ0 2） このため装置容量に対する各出力成分の最適リミッタ値
は、装置容量を１００％とすれば、下記となる。Active power capacity = 35% (70% ÷ 2)
→ P 0 = (100 × 0.7 / 2) ・ Reactive power compensation amount = 71.4% → Q 0 = 100 × √ (1
−0.7 2 ) ・ Device capacity = √ (35 2 +71.4 2 ) = 79.5% → √
(P 0 2 + Q 0 2 ) ・ Ratio K 1 ≒ 0.4 of active power exchange amount to device capacity
4 → P 0 / √ (P 0 2 + Q 0 2 ) Therefore, the optimum limiter value of each output component with respect to the device capacity is as follows when the device capacity is 100%.
【００３７】・有効電力リミッタ＝４４％，無効電力リ
ミッタ＝９０％ よって、リミッタ２２T，２２Mのリミット値をインバー
タ装置定格の９０％に、またリミッタ２５のリミット値
をインバータ装置定格の４４％にセットすることで、無
効電力補償量と有効電力融通量を最適に制御することが
できる。Active power limiter = 44%, reactive power limiter = 90% Accordingly, the limit values of the limiters 22 T and 22 M are set to 90% of the inverter device rating, and the limit value of the limiter 25 is set to 44% of the inverter device rating. , The reactive power compensation amount and the active power interchange amount can be optimally controlled.
【００３８】[0038]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００３９】（１）２系統にどのような状態の負荷が接
続されても、装置定格以内で運転することができる。(1) No matter what kind of load is connected to the two systems, operation can be performed within the device rating.
【００４０】（２）請求項１のものは、有効電力又は無
効電力のどちらかを優先して装置定格内いっぱいのまま
で補償することができるので、装置を有効に使用でき
る。(2) According to the first aspect, either the active power or the reactive power can be preferentially compensated while remaining within the device rating, so that the device can be used effectively.
【００４１】（３）請求項２のものは、一方の系統の負
荷が回生負荷となった場合、通常負荷の不平衡分だけを
検出し、回生負荷分を無視して有効電力を補償すること
ができるので、回生負荷による装置過負荷を生じない。(3) When the load of one system is a regenerative load, only the unbalanced portion of the normal load is detected and the active power is compensated by ignoring the regenerative load. Therefore, overload of the device due to regenerative load does not occur.
【００４２】（４）請求項３のものは、有効電力補償容
量を確保した無効電力重みづけ補償制御となっているた
め、電圧降下と電流不平衡に対して同時に有効に対策で
きる。また、有効電力融通量と無効電力補償量がベクト
ル演算したリミッタとなっているため効果的な出力を出
すことができる。(4) According to the third aspect of the present invention, the reactive power weighting compensation control which secures the active power compensating capacity enables effective measures against voltage drop and current imbalance at the same time. Further, since the active power interchange amount and the reactive power compensation amount are vector-limited limiters, an effective output can be output.
【図面の簡単な説明】[Brief description of the drawings]
【図１】インバータ装置（ＳＶＧ）の説明図。FIG. 1 is an explanatory diagram of an inverter device (SVG).
【図２】有効電力融通による電力平衡化の説明図。FIG. 2 is an explanatory diagram of power balancing by real power interchange.
【図３】実施例１にかかる無効電力優先の有効，無効電
力指令回路構成図。FIG. 3 is a diagram illustrating a configuration of a reactive power priority active / reactive power command circuit according to the first embodiment;
【図４】（Ａ）及び（Ｂ）は優先制御列及び従来例の有
効・無効電力の合成ベクトル図。4A and 4B are combined vector diagrams of a priority control sequence and active / reactive power of a conventional example.
【図５】実施例２にかかる有効電力補償量検出回路構成
図。FIG. 5 is a configuration diagram of an active power compensation amount detection circuit according to a second embodiment.
【図６】実施例３にかかる有効，無効電力指令回路構成
図。FIG. 6 is a configuration diagram of an active / reactive power command circuit according to a third embodiment.
【図７】有効，無効電力の制御説明図。FIG. 7 is an explanatory diagram of active / reactive power control.
【図８】従来例にかかる有効，無効電力指令回路構成
図。FIG. 8 is a diagram showing a configuration of an active / reactive power command circuit according to a conventional example.
【図９】（ａ）及び（ｂ）は一般負荷の場合及び回生負
荷の場合の不平衡説明図。FIGS. 9A and 9B are explanatory diagrams of unbalance in a case of a general load and a case of a regenerative load.
１…スコット変圧器 ２T…１系（Ｔ座側系統） ２M…２系（Ｍ座側系統） ３…インバータ装置（ＳＶＧ） ３T，３M…インバータ ５，５1，５2…有効電力補償量検出回路 ６…無効電力補償量検出回路 ７，７1，７2，８…リミッタ ７’…可変形リミッタ １０…装置余力演算回路（ベクトル演算回路） １１…２乗演算器 １２，１５…減算器 １３…平方根演算器 １６…１／２演算器 １７…極性反転器 ２１T，２１M…無効電力・有効電力検出回路 ２２T，２２M，２５…リミッタ ２４…１／２演算器 ２７T，２７M…インバータ制御回路1 ... Scott transformer 2 T ... 1 system (T seat side line) 2 M ... 2 system (M seat side strain) 3 ... inverter (SVG) 3 T, 3 M ... inverter 5,5 1, 5 2 ... Enabled power compensation amount detection circuit 6 ... var compensator amount detection circuit 7, 7 1, 7 2, 8 ... limiter 7 '... deformable limiter 10 ... apparatus margin calculation circuit (vector computing circuit) 11 ... square operator 12 and 15 ... subtractor 13 ... square-root calculator 16 ... 1/2 calculator 17 ... polarity inverter 21 T, 21 M ... reactive power, active power detector 22 T, 22 M, 25 ... limiter 24 ... 1/2 calculator 27 T , 27 M … Inverter control circuit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小野 正明 東京都品川区大崎２丁目１番17号 株式 会社明電舎内 (56)参考文献 特開 昭52−64644（ＪＰ，Ａ) 特開 平４−265632（ＪＰ，Ａ) 特開 平７−15979（ＪＰ，Ａ) 特開 平４−96626（ＪＰ，Ａ) 特開 平６−303780（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02M 7/48 H02J 3/06 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaaki Ono 2-1-17-1 Osaki, Shinagawa-ku, Tokyo Inside Meidensha Co., Ltd. (56) References JP-A-52-64644 (JP, A) JP-A-4- 265632 (JP, A) JP-A-7-15979 (JP, A) JP-A-4-96626 (JP, A) JP-A-6-303780 (JP, A) (58) Fields investigated (Int. 7 , DB name) H02M 7/48 H02J 3/06
Claims (3)
電源系統間に直流回路を共通に接続した２つのインバー
タを接続し、有効電力を２つの系統間で融通しながら無
効電力を補償するインバータ装置の制御において、 有効電力及び無効電力の補償量をそれぞれ装置定格（１
００％）で制限する２つのリミッタを設け、 リミッタからの有効電力と無効電力の補償量のどちらか
一方を優先させて制御し、優先させる有効電力又は無効
電力の補償量（％）の２乗を求め、これを装置定格（１
００％）から引き、更にその結果の平方根を求め、その 求めた信号により優先制御させない他方の無効電力
又は有効電力の補償量を上記リミッタの制限値を変更し
て変え、 有効電力と無効電力の補償量のベクトル和が装置定格以
上の補償量とならないようにしたことを特徴とした、イ
ンバータ装置の制御方法。1. A connecting two inverters connected to the DC circuit in common between the two single-phase AC power system of Scott transformer secondary side, compensate for the reactive power while interchange active power between the two systems In the control of the inverter device, the amount of compensation for the active power and the amount of the
Two limiters that limit 00%) provided controls give priority to either the active power and the compensation amount of reactive power from the limiter, the compensation amount of the active power or reactive power is prioritized in (%) Calculate the square and calculate this as the device rating (1
Pull 00%), further as a result the square root of the other reactive power which does not preferentially controlled by the determined signal
Or a compensation amount of active power change by changing the limit value of the limiter, the vector sum of the compensation amount of the active power and reactive power is characterized in that so as not a compensation amount or more devices rated inverter device Control method.
電源系統間に直流回路を共通に接続した２つのインバー
タを接続し、有効電力を２つの系統間で融通しながら無
効電力を補償するインバータ装置の制御において、有効電力 検出量を通常の有効電力負荷の場合は＋信号，
回生負荷の場合は−信号として、負荷の有効電力をそれ
ぞれの系統で独立に検出し、 各有効電力検出量の上限を装置定格（１００％）に制限
し下限を定格の０％に制限する各リミッタにかけ、 リミッタをかけたそれぞれの系統の有効電力検出量から
系統間の有効電力の不平衡量を計算してその結果を有効
電力補償量とし、有効電力を平衡化制御すると共に 回生負荷が生じても有
効電力の補償量が増加することのないようにしたことを
特徴としたインバータ装置の制御方法。2. A connecting two inverters connected to the DC circuit in common between the two single-phase AC power system of Scott transformer secondary side, compensate for the reactive power while interchange active power between the two systems In the control of the inverter device, the active power detection amount is set to a + signal for a normal active power load,
If the regenerative load - as a signal, limiting the load of active power detected independently in each strain, the upper limit of the effective power detection amount to the apparatus rated (100%)
Over it was lower in the limiter to limit to 0% of the rated from active power detected amount of each of the lines multiplied by the limiter
Calculates the unbalance amount of active power between the systems and the result with effective power compensation amount, even when regenerative load controls balance the active power Yes
A method for controlling an inverter device, characterized in that the effective power compensation amount is not increased.
電源系統間に直流回路を共通に接続した２つのインバー
タを接続し、有効電力を２つの系統間で融通しながら無
効電力を補償するインバータ装置の制御において、 各系統の無効電力を無効電力補償指令量とすると共に、
両系統の有効電力差の半分を有効電力融通指令量とし、
これらの指令量のベクトル和が装置の定格を越えないよ
うにそれぞれ指令値にリミッタをかけ、 それぞれの指令値のリミッタ配分は負荷の力率の悪さに
応じて無効電力補償量に重みづけして有効電力融通量を
低減させた固定配分量とし、 いかなる負荷でも装置定格以内で運転し得ると共に無効
電力補償量と有効電力融通量を最適に制御し得るように
したことを特徴としたインバータ装置の制御方法。3. Two single-phase alternating currents on the secondary side of a Scott transformer
Two invars with a DC circuit commonly connected between power systems
In the control of an inverter device that connects reactive power and compensates for reactive power while accommodating active power between the two systems, the reactive power of each system is used as a reactive power compensation command amount,
Half of the active power difference between the two systems is used as the active power interchange command amount,
Vector sum of these directives quantity multiplied by limiter to each command value so as not to exceed the rating of the device, the weight Dzu the reactive power compensation quantity according the limiter allocation of respective command values in poor power factor of the load The fixed allocation amount reduces the amount of active power that can be transferred , and any load can be operated within the equipment rating and disabled.
A method of controlling an inverter device, wherein an amount of power compensation and an amount of active power interchange can be optimally controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17169695A JP3263281B2 (en) | 1995-07-07 | 1995-07-07 | Control method of inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17169695A JP3263281B2 (en) | 1995-07-07 | 1995-07-07 | Control method of inverter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0923657A JPH0923657A (en) | 1997-01-21 |
| JP3263281B2 true JP3263281B2 (en) | 2002-03-04 |
Family
ID=15927998
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|---|---|---|---|
| JP17169695A Expired - Lifetime JP3263281B2 (en) | 1995-07-07 | 1995-07-07 | Control method of inverter device |
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| Country | Link |
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|---|---|---|---|---|
| JP2003061250A (en) * | 2001-08-10 | 2003-02-28 | Mitsubishi Electric Corp | Voltage fluctuation compensator |
| JP4892459B2 (en) * | 2007-11-13 | 2012-03-07 | 東芝三菱電機産業システム株式会社 | Control device for voltage fluctuation compensator for railway |
| JP5278026B2 (en) * | 2009-02-19 | 2013-09-04 | 富士電機株式会社 | Reactive power compensator and control method of reactive power compensator |
| JP5321119B2 (en) * | 2009-02-19 | 2013-10-23 | 富士電機株式会社 | Reactive power compensator and control method of reactive power compensator |
| JP5289178B2 (en) * | 2009-05-14 | 2013-09-11 | 三菱電機株式会社 | Control device and control method for voltage fluctuation compensation device for electric railway |
| JP2012051465A (en) * | 2010-09-01 | 2012-03-15 | Toshiba Mitsubishi-Electric Industrial System Corp | Control device of power compensating device for electric railroad |
| JP5645792B2 (en) * | 2011-10-26 | 2014-12-24 | 三菱電機株式会社 | Power converter |
| JP6514070B2 (en) * | 2015-08-25 | 2019-05-15 | 東芝インフラシステムズ株式会社 | Power compensation device for railway |
| CN109214618B (en) * | 2017-06-29 | 2023-08-22 | 平高集团有限公司 | Rural power grid local reactive compensation allocation control method and device |
| CN109066745B (en) * | 2018-08-09 | 2022-03-15 | 蔚来(安徽)控股有限公司 | Electric energy storage system and operation control method, device and system thereof |
-
1995
- 1995-07-07 JP JP17169695A patent/JP3263281B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0923657A (en) | 1997-01-21 |
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