JP2000060179A - Method for controlling solar light inverter for driving pump - Google Patents
Method for controlling solar light inverter for driving pumpInfo
- Publication number
- JP2000060179A JP2000060179A JP10220414A JP22041498A JP2000060179A JP 2000060179 A JP2000060179 A JP 2000060179A JP 10220414 A JP10220414 A JP 10220414A JP 22041498 A JP22041498 A JP 22041498A JP 2000060179 A JP2000060179 A JP 2000060179A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- frequency
- voltage vdc
- solar
- output
- 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.)
- Withdrawn
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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、遊園地の噴水設
備，人工滝などに使用されるポンプ駆動用太陽光インバ
ータの制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a solar inverter for driving a pump used for a fountain facility, an artificial waterfall, etc. in an amusement park.
【０００２】[0002]
【従来の技術】従来のこの種のポンプ駆動用インバータ
においては、商用電源などの交流電源を入力とする周知
の技術のインバータにより一定の周波数の交流電力に変
換して交流電動機に給電し、該電動機によりポンプを駆
動する構成が一般的である。または、前記インバータの
中間直流回路にダイオードを介して太陽電池を接続した
構成にし、日射量の多いときのみ太陽電池の電力と前記
交流電源の電力とを併用して該インバータを動作させる
ようにしていた。2. Description of the Related Art In a conventional inverter for driving a pump of this type, an inverter of a known technology which receives an AC power supply such as a commercial power supply converts the AC power into a constant frequency AC power and feeds it to an AC motor. A configuration in which a pump is driven by an electric motor is general. Alternatively, a solar cell is connected to the intermediate DC circuit of the inverter via a diode, and the inverter is operated using both the power of the solar cell and the power of the AC power supply only when the amount of solar radiation is large. Was.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上述の従
来のポンプ駆動用インバータでは、近年の省エネルギー
の要請に対して十分ではなかった。この発明の目的は上
記問題点を解決し、太陽電池のみを直流電源とするポン
プ駆動用太陽光インバータの制御方法を提供することに
ある。However, the above-mentioned conventional inverter for driving a pump has not been sufficient for recent demands for energy saving. An object of the present invention is to solve the above problems and to provide a method of controlling a solar inverter for driving a pump using only a solar cell as a DC power supply.
【０００４】[0004]
【課題を解決するための手段】この発明は、太陽電池か
らの直流電力を所望の周波数の交流電力に変換して交流
電動機に給電する太陽光インバータであって、該交流電
動機で駆動されるポンプを制御するポンプ駆動用太陽光
インバータの制御方法において、太陽電池の端子電圧Ｖ
ｄｃが所定の基準レベル値（基準電圧Ｖｄｃ* ＋レベル
値ΔＶS ）を越え、且つこの状態が所定の時限ＴON間継
続したときに太陽光インバータを起動させ、起動した太
陽光インバータは、所定の加速量設定値Ａｃｃ（Ｈｚ／
ｓｅｃ／ΔＶ）に基づき該インバータが出力する周波数
を前記電動機の定格周波数ｆR まで増大させ、前記イン
バータの周波数を増大中、又は該インバータが前記定格
周波数ｆR を出力中に、太陽電池の端子電圧Ｖｄｃが前
記基準電圧Ｖｄｃ* より低下したときには、所定の減速
量設定値Ｄｅｃ（Ｈｚ／ｓｅｃ／ΔＶ）に基づき該イン
バータが出力する周波数を減少させ、前記インバータが
出力する周波数を減少させることにより、太陽電池の端
子電圧Ｖｄｃが前記基準電圧Ｖｄｃ* まで上昇したとき
には、このときの周波数で該インバータの運転を継続
し、さらに太陽電池の端子電圧Ｖｄｃが前記基準電圧Ｖ
ｄｃ* を越えたときには、前記加速量設定値Ａｃｃに基
づき前記インバータが出力する周波数を前記電動機の定
格周波数ｆR に向かって増大させ、また前記インバータ
が出力する周波数を減少中に、該インバータが出力する
周波数が所定の周波数下限値ｆL 以下になり、且つこの
状態が所定の時限ＴOFF 間継続したときに該インバータ
を停止させることを特徴とする。SUMMARY OF THE INVENTION The present invention relates to a solar inverter for converting DC power from a solar cell into AC power of a desired frequency and supplying the AC power to an AC motor, and a pump driven by the AC motor. In the method for controlling the solar inverter for driving the pump, which controls the solar cell, the terminal voltage V
When dc exceeds a predetermined reference level value (reference voltage Vdc * + level value ΔV S ) and this state continues for a predetermined time period T ON , the solar inverter is activated. Acceleration value set value Acc (Hz /
sec / ΔV), the frequency output by the inverter is increased to the rated frequency f R of the electric motor, and while the frequency of the inverter is being increased or the inverter is outputting the rated frequency f R , the terminal of the solar cell is When the voltage Vdc is lower than the reference voltage Vdc *, the frequency output by the inverter is reduced based on a predetermined deceleration amount setting value Dec (Hz / sec / ΔV), and the frequency output by the inverter is reduced. When the terminal voltage Vdc of the solar cell rises to the reference voltage Vdc * , the operation of the inverter is continued at the frequency at this time, and the terminal voltage Vdc of the solar cell becomes the reference voltage Vdc.
When dc * is exceeded, the frequency output by the inverter is increased toward the rated frequency f R of the electric motor based on the acceleration amount set value Acc. The inverter is stopped when the output frequency is equal to or lower than a predetermined frequency lower limit value f L and this state continues for a predetermined time period T OFF .
【０００５】この発明は、下記に着目してなされたもの
である。すなわち、遊園地の噴水設備，人工滝などに使
用されるポンプにおいては、夜間または雨天の日中には
該ポンプを停止しても構わないこと、さらに該ポンプを
駆動する電動機の回転数（＝インバータの出力周波数）
は一定でなくても、景観を損なわない所定の変動範囲内
であれば設置上の目的は達せられる。The present invention has been made by paying attention to the following. That is, in the case of a pump used for a fountain facility or an artificial waterfall in an amusement park, the pump may be stopped at night or on a rainy day, and the number of rotations of an electric motor for driving the pump (= Inverter output frequency)
Even if is not constant, the purpose of installation can be achieved if it is within a predetermined fluctuation range that does not impair the landscape.
【０００６】[0006]
【発明の実施の形態】図１は、この発明の実施の形態を
示すポンプ駆動用太陽光インバータの回路構成図であ
り、１は太陽電池、２ａ，２ｂは回路遮断器、３は太陽
光インバータ、４は太陽光インバータ３で給電される交
流電動機、５は交流電動機４の駆動軸に結合されたポン
プを示す。FIG. 1 is a circuit diagram of a solar inverter for driving a pump according to an embodiment of the present invention, wherein 1 is a solar cell, 2a and 2b are circuit breakers, and 3 is a solar inverter. Reference numeral 4 denotes an AC motor supplied by the solar inverter 3, and reference numeral 5 denotes a pump coupled to a drive shaft of the AC motor 4.
【０００７】この太陽光インバータ３には直流電圧平滑
用のコンデンサ３１、例えば図示の如くＩＧＢＴとダイ
オードとを逆並列接続してなるスイッチング回路を３相
ブリッジ構成にしたインバータ主回路３２、太陽電池１
から回路遮断器２ａ，２ｂを介して太陽光インバータ３
に入力される端子電圧（Ｖｄｃ）を検出する電圧検出器
３３、予め設定された基準電圧Ｖｄｃ* と電圧検出器３
３で検出した前記電圧Ｖｄｃとの偏差を求める加算演算
器３４、この偏差と予め設定された加速量設定値Ａｃ
ｃ，減速量設定値Ｄｅｃとにより太陽光インバータ３が
出力する周波数を演算し、これを周波数指令値ｆ* とし
て出力する指令値演算回路３５、該周波数指令値ｆ* に
基づく周波数，電圧の交流をインバータ主回路３２が出
力するためのＰＷＭ演算を行い、この演算値により前記
それぞれのＩＧＢＴに駆動信号を生成する周知の技術の
インバータ制御回路３６の他に、加算演算器３７，比較
器３８，タイマー３９，反転素子４０，アンド素子４
１，フリップ・フロップ素子４２，比較器４３，アンド
素子４４，タイマー４５からなる運転シーケンス回路を
備えている。The solar inverter 3 includes a capacitor 31 for smoothing a DC voltage, for example, an inverter main circuit 32 in which a switching circuit formed by connecting an IGBT and a diode in anti-parallel as shown in FIG.
From the solar inverter 3 via the circuit breakers 2a and 2b
, A voltage detector 33 for detecting a terminal voltage (Vdc) input to the input terminal, a predetermined reference voltage Vdc * and a voltage detector 3
An addition calculator 34 for obtaining a deviation from the voltage Vdc detected in step 3, the deviation and a preset acceleration amount set value Ac
c, by a reduction amount set value Dec calculates the frequency output by the solar inverter 3, the command value calculating circuit 35 for output as a frequency command value f *, the frequency based on the frequency command value f *, a voltage alternating current Is performed by the inverter main circuit 32 to output a drive signal to each of the IGBTs based on the calculated value. In addition to the well-known inverter control circuit 36, an adder 37, a comparator 38, Timer 39, inversion element 40, AND element 4
An operation sequence circuit including a flip-flop element 42, a comparator 43, an AND element 44, and a timer 45 is provided.
【０００８】図１に示した太陽光インバータ３におい
て、日射量の増大に伴い太陽電池１の端子電圧が上昇す
ると、前述の参照符号３３〜４５それぞれの回路が初期
状態になり、この初期状態ではフリップ・フロップ素子
４２の出力Ｑは論理「Ｌ」レベルになっており、この論
理「Ｌ」レベルによりインバータ制御回路３６は前述の
動作を停止し、この停止を論理「Ｌ」レベルの状態信号
としてインバータ制御回路３６が出力している。同様
に、フリップ・フロップ素子４２の出力Ｑの論理「Ｌ」
レベルにより指令値演算回路３５も動作を停止し、指令
値演算回路３５が出力する前記周波数指令値ｆ* も零と
なっている。In the solar inverter 3 shown in FIG. 1, when the terminal voltage of the solar cell 1 increases with an increase in the amount of solar radiation, the circuits indicated by the above-mentioned reference numerals 33 to 45 enter an initial state. The output Q of the flip-flop element 42 is at a logic "L" level, and the inverter control circuit 36 stops the above-mentioned operation by this logic "L" level, and this stop is used as a logic "L" level state signal. The output is from the inverter control circuit 36. Similarly, the logic “L” of the output Q of the flip-flop element 42
The command value calculation circuit 35 also stops operating according to the level, and the frequency command value f * output from the command value calculation circuit 35 is also zero.
【０００９】先ず、上述の初期状態以降の前記運転シー
ケンス回路の動作を説明する。さらに日射量の増大に伴
い、太陽電池１の端子電圧Ｖｄｃが、前記基準電圧Ｖｄ
ｃ* （例えば、２７０Ｖ）と予め設定されたレベル値Δ
ＶS （例えば、２０Ｖ）とを加算する加算演算器３７の
出力である前記基準レベル値（２９０Ｖ）を越えると比
較器３８の出力が論理「Ｈ」レベルとなり、この論理
「Ｈ」レベルの状態の継続時間をタイマー３９（時限Ｔ
ON）で監視し、時限ＴON（例えば、５分）経過するとタ
イマー３９の出力が論理「Ｈ」レベルとなり、前記論理
「Ｌ」レベルの状態信号が入力される反転素子４０の出
力とタイマー３９の出力とによりアンド素子４１の出力
が論理「Ｈ」レベルとなり、このとき後述の如くタイマ
ー４５の出力も論理「Ｌ」レベルとなっているので、フ
リップ・フロップ素子４２の出力Ｑが初期状態の論理
「Ｌ」レベルから論理「Ｈ」レベルに変化する。First, the operation of the operation sequence circuit after the above-described initial state will be described. Further, with an increase in the amount of solar radiation, the terminal voltage Vdc of the solar cell 1 increases with the reference voltage Vd.
c * (for example, 270 V) and a preset level value Δ
When the output exceeds the reference level value (290 V) which is the output of the adder 37 for adding V S (for example, 20 V), the output of the comparator 38 becomes a logic “H” level, and the state of this logic “H” level Timer 39 (timed T
ON ), and when the time period T ON (for example, 5 minutes) elapses, the output of the timer 39 becomes the logic “H” level, and the output of the inversion element 40 to which the logic “L” level state signal is input and the timer 39 And the output of the AND element 41 is at the logic "H" level. At this time, the output of the timer 45 is also at the logic "L" level as described later, so that the output Q of the flip-flop element 42 is in the initial state. The level changes from the logical “L” level to the logical “H” level.
【００１０】フリップ・フロップ素子４２の出力Ｑが論
理「Ｈ」レベルになると、後述の指令値演算回路３５と
インバータ制御回路３６とが動作を開始する。インバー
タ制御回路３６が動作を開始し、若干の時間経過の後、
前記駆動信号が発せられると前記状態信号が論理「Ｌ」
レベルから論理「Ｈ」レベルに変化し、アンド素子４１
の出力が論理「Ｌ」レベルとなるがフリップ・フロップ
素子４２の出力Ｑは論理「Ｈ」レベルを保持する。When the output Q of the flip-flop element 42 becomes a logic "H" level, a command value calculation circuit 35 and an inverter control circuit 36 described later start operating. The inverter control circuit 36 starts operating, and after a lapse of a short time,
When the drive signal is issued, the state signal becomes logic "L".
Level from the logic "H" level to the AND element 41.
Is at the logic "L" level, but the output Q of the flip-flop element 42 holds the logic "H" level.
【００１１】また、後述の指令値演算回路３５が動作中
の周波数指令値ｆ* が予め設定された周波数下限値ｆL
（例えば交流電動機４の定格周波数ｆR が６０Ｈｚのと
きは、ｆL は３０Ｈｚ程度）以下になると、比較器４３
の出力が論理「Ｈ」レベルとなり、前記論理「Ｈ」レベ
ルの状態信号と比較器４３の出力とによりアンド素子４
４の出力が論理「Ｈ」レベルとなり、この論理「Ｈ」レ
ベルの状態の継続時間をタイマー４５（時限ＴOFF ）で
監視し、時限ＴOFF （例えば、１分）を経過するとタイ
マー４５の出力が論理「Ｈ」レベルとなり、このとき上
述の如くアンド素子４１の出力が論理「Ｌ」レベルであ
るので、フリップ・フロップ素子４２の出力Ｑが論理
「Ｈ」レベルから論理「Ｌ」レベルに変化し、この論理
「Ｌ」レベルにより指令値演算回路３５とインバータ制
御回路３６とが動作を停止する。A frequency command value f * when a command value calculation circuit 35 described later is operating is set to a predetermined frequency lower limit value f L.
(For example, when the rated frequency f R of the AC motor 4 is 60 Hz, f L is about 30 Hz).
Becomes the logic "H" level, and the AND element 4 is output by the state signal of the logic "H" level and the output of the comparator 43.
The output of the timer 45 becomes a logic "H" level, and the duration of the state of the logic "H" level is monitored by a timer 45 (timed TOFF ). When the timed TOFF (for example, 1 minute) elapses, the output of the timer 45 is output. Becomes the logic "H" level, and at this time, the output Q of the flip-flop element 42 changes from the logic "H" level to the logic "L" level because the output of the AND element 41 is the logic "L" level as described above. Then, the command value calculation circuit 35 and the inverter control circuit 36 stop operating at the logic "L" level.
【００１２】次に、上述の運転シーケンス回路の動作に
より、フリップ・フロップ素子４２の出力Ｑが論理
「Ｌ」レベルから論理「Ｈ」レベルに変化した以降の指
令値演算回路３５の動作を説明する。指令値演算回路３
５は単一積分器，比例−積分演算器，出力制限器などか
ら形成され、この指令値演算回路３５が動作状態になる
と、指令値演算回路３５が出力する周波数指令値ｆ* は
零から、加算演算器３４で得られるその都度の基準電圧
Ｖｄｃ* と電圧検出器３３で検出した太陽電池１の端子
電圧Ｖｄｃとの偏差（極性は正）と、予め設定された加
速量設定値Ａｃｃ（例えば、１Ｈｚ／１ｓｅｃ／１Ｖ）
との積で得られる勾配（Ｈｚ／ｓｅｃ）で増大させ、こ
の増大結果の上限値は交流電動機４の定格周波数ｆR に
相当する周波数指令値ｆ* となる。Next, the operation of the command value calculation circuit 35 after the output Q of the flip-flop element 42 changes from the logic "L" level to the logic "H" level by the operation of the above-described operation sequence circuit will be described. . Command value calculation circuit 3
Numeral 5 is formed of a single integrator, a proportional-integral calculator, an output limiter, and the like. When the command value calculation circuit 35 is in an operating state, the frequency command value f * output from the command value calculation circuit 35 changes from zero to The deviation (polarity is positive) between the respective reference voltage Vdc * obtained by the addition calculator 34 and the terminal voltage Vdc of the solar cell 1 detected by the voltage detector 33, and a preset acceleration amount set value Acc (for example, , 1Hz / 1sec / 1V)
And the upper limit of the result of the increase is a frequency command value f * corresponding to the rated frequency f R of the AC motor 4.
【００１３】指令値演算回路３５が出力する周波数指令
値ｆ* を増大中、又は周波数指令値ｆ* が前記ｆR で太
陽光インバータ３が動作中に、太陽電池１の端子電圧Ｖ
ｄｃが基準電圧Ｖｄｃ* より低下したときには、加算演
算器３４で得られるその都度の偏差（極性は負）と、予
め設定された減速量設定値Ｄｅｃ（例えば、１０Ｈｚ／
１ｓｅｃ／１Ｖ）との積で得られる勾配（Ｈｚ／ｓｅ
ｃ）で周波数指令値ｆ*を減少させる。[0013] In increasing the frequency command value f * of the command value calculating circuit 35 outputs, or solar inverter 3 is operating at a frequency command value f * is the f R, the terminal voltage of the solar cell 1 V
When dc falls below the reference voltage Vdc * , the respective deviation (negative polarity) obtained by the addition calculator 34 and the preset deceleration amount setting value Dec (for example, 10 Hz /
1 sec / 1 V) (Hz / sec)
In step c), the frequency command value f * is decreased.
【００１４】上述の如く加速量設定値Ａｃｃに対して減
速量設定値Ｄｅｃは１０倍程度大きい値であることと、
さらにポンプ５は周知の２乗特性負荷であることから、
太陽電池１の端子電圧Ｖｄｃが基準電圧Ｖｄｃ* より低
下したときに、太陽光インバータ３が出力する周波数を
減少させることにより、太陽電池１の端子電圧は上昇す
る。その結果、太陽電池１の端子電圧Ｖｄｃが前記基準
電圧Ｖｄｃ* まで上昇する過程では指令値演算回路３５
が出力する周波数指令値ｆ* の前記勾配は徐々に小さく
なり、前記Ｖｄｃ＝Ｖｄｃ* となる周波数指令値ｆ* に
落ちつく。As described above, the deceleration setting value Dec is about 10 times larger than the acceleration setting value Acc, and
Further, since the pump 5 has a well-known square characteristic load,
When the terminal voltage Vdc of the solar cell 1 is lower than the reference voltage Vdc * , the frequency output by the solar inverter 3 is reduced, so that the terminal voltage of the solar cell 1 increases. As a result, when the terminal voltage Vdc of the solar cell 1 rises to the reference voltage Vdc * , the command value calculation circuit 35
The gradient of the frequency command value f * output by the controller gradually decreases, and settles to the frequency command value f * that satisfies Vdc = Vdc * .
【００１５】日射量の変化により太陽電池１の端子電圧
Ｖｄｃが前記基準電圧Ｖｄｃ* を越えたときには、前記
加速量設定値Ａｃｃに基づき指令値演算回路３５が出力
する周波数指令値ｆ* を前記ｆR に向かって増大させ
る。すなわち、この太陽光インバータ３では日射量が十
分にあれば太陽電池１の端子電圧Ｖｄｃが前記基準電圧
Ｖｄｃ* を越えており、その結果、交流電動機４は定格
周波数ｆR ，定格回転数の状態にあり、また日射量が低
下した状態では太陽電池１の端子電圧Ｖｄｃが前記基準
電圧Ｖｄｃ* と等しくなる周波数を太陽光インバータ３
が出力し、交流電動機４はこの周波数で回転している。
但し、指令値演算回路３５が出力する周波数指令値ｆ*
が周波数下限値ｆL 以下になると前述の運転シーケンス
回路の監視下に置かれる。When the terminal voltage Vdc of the solar cell 1 exceeds the reference voltage Vdc * due to a change in the amount of solar radiation, the frequency command value f * output from the command value calculation circuit 35 based on the acceleration amount set value Acc is converted to the frequency f. Increase towards R. That is, in the solar inverter 3, if the solar radiation is sufficient, the terminal voltage Vdc of the solar cell 1 exceeds the reference voltage Vdc * . As a result, the AC motor 4 is in the state of the rated frequency f R and the rated rotation speed. In a state where the amount of solar radiation is reduced, the frequency at which the terminal voltage Vdc of the solar cell 1 becomes equal to the reference voltage Vdc * is set to the solar inverter 3
And the AC motor 4 is rotating at this frequency.
However, the frequency command value f * output by the command value calculation circuit 35
Is below the lower frequency limit f L, the operation sequence circuit is placed under monitoring.
【００１６】[0016]
【発明の効果】この発明によれば、太陽電池のみを直流
電源とするポンプ駆動用太陽光インバータを提供でき、
近年の省エネルギーの要請に寄与できる。またこの発明
の制御方法によれば、ポンプ駆動用太陽光インバータの
運転・停止操作も自動化でき、省人化にも寄与できる。According to the present invention, a solar inverter for driving a pump using only a solar cell as a DC power supply can be provided.
It can contribute to the recent demand for energy saving. Further, according to the control method of the present invention, the operation of starting and stopping the solar inverter for driving the pump can be automated, which can contribute to labor saving.
【００１７】すなわち、遊園地の噴水設備，人工滝など
に使用されるポンプ駆動用太陽光インバータとして好適
である。That is, the present invention is suitable as a pump driving solar inverter used for a fountain facility in an amusement park, an artificial waterfall, and the like.
【図１】この発明の実施の形態を示すポンプ駆動用太陽
光インバータの回路構成図FIG. 1 is a circuit configuration diagram of a solar inverter for driving a pump, showing an embodiment of the present invention.
１…太陽電池、２ａ，２ｂ…回路遮断器、３…太陽光イ
ンバータ、４…交流電動機、５…ポンプ、３１…コンデ
ンサ、３２…インバータ主回路、３３…電圧検出器、３
４…加算演算器、３５…指令値演算回路、３６…インバ
ータ制御回路、３７…加算演算器、３８…比較器、３９
…タイマー、４０…反転素子、４１…アンド素子、４２
…フリップ・フロップ素子、４３…比較器、４４…アン
ド素子、４５…タイマー。DESCRIPTION OF SYMBOLS 1 ... Solar cell, 2a, 2b ... Circuit breaker, 3 ... Solar inverter, 4 ... AC motor, 5 ... Pump, 31 ... Capacitor, 32 ... Inverter main circuit, 33 ... Voltage detector, 3
4 Addition calculator, 35 Command value calculation circuit, 36 Inverter control circuit, 37 Addition calculator, 38 Comparator, 39
... Timer, 40 ... Reversal element, 41 ... And element, 42
.., Flip-flop element, 43, comparator, 44, and element, 45, timer.
Claims (1)
交流電力に変換して交流電動機に給電する太陽光インバ
ータであって、該交流電動機で駆動されるポンプを制御
するポンプ駆動用太陽光インバータの制御方法におい
て、 太陽電池の端子電圧Ｖｄｃが所定の基準レベル値（基準
電圧Ｖｄｃ* ＋レベル値ΔＶS ）を越え、且つこの状態
が所定の時限ＴON間継続したときに太陽光インバータを
起動させ、 起動した太陽光インバータは、所定の加速量設定値Ａｃ
ｃ（Ｈｚ／ｓｅｃ／ΔＶ）に基づき該インバータが出力
する周波数を前記電動機の定格周波数ｆR まで増大さ
せ、 前記インバータの周波数を増大中、又は該インバータが
前記定格周波数ｆR を出力中に、太陽電池の端子電圧Ｖ
ｄｃが前記基準電圧Ｖｄｃ* より低下したときには、所
定の減速量設定値Ｄｅｃ（Ｈｚ／ｓｅｃ／ΔＶ）に基づ
き該インバータが出力する周波数を減少させ、 前記インバータが出力する周波数を減少させることによ
り、太陽電池の端子電圧Ｖｄｃが前記基準電圧Ｖｄｃ*
まで上昇したときには、このときの周波数で該インバー
タの運転を継続し、 さらに太陽電池の端子電圧Ｖｄｃが前記基準電圧Ｖｄｃ
* を越えたときには、前記加速量設定値Ａｃｃに基づき
前記インバータが出力する周波数を前記電動機の定格周
波数ｆR に向かって増大させ、 また前記インバータが出力する周波数を減少中に、該イ
ンバータが出力する周波数が所定の周波数下限値ｆL 以
下になり、且つこの状態が所定の時限ＴOFF 間継続した
ときに該インバータを停止させることを特徴とするポン
プ駆動用太陽光インバータの制御方法。1. A solar inverter for converting DC power from a solar cell into AC power of a desired frequency and feeding the AC power to an AC motor, wherein the pump driving solar light controls a pump driven by the AC motor. In the inverter control method, when the terminal voltage Vdc of the solar cell exceeds a predetermined reference level value (reference voltage Vdc * + level value ΔV S ) and this state continues for a predetermined time period T ON , the solar inverter is activated. After starting, the started solar inverter has a predetermined acceleration amount set value Ac.
c (Hz / sec / ΔV), increasing the frequency output by the inverter to the rated frequency f R of the motor, while increasing the frequency of the inverter, or while the inverter is outputting the rated frequency f R , Terminal voltage V of solar cell
When dc falls below the reference voltage Vdc *, the frequency output by the inverter is reduced based on a predetermined deceleration amount setting value Dec (Hz / sec / ΔV), and the frequency output by the inverter is reduced. The terminal voltage Vdc of the solar cell is equal to the reference voltage Vdc *.
When the voltage rises to above, the operation of the inverter is continued at the frequency at this time, and the terminal voltage Vdc of the solar cell is further reduced to the reference voltage Vdc.
* , The frequency output by the inverter is increased toward the rated frequency f R of the motor based on the acceleration amount set value Acc. Also, while the frequency output by the inverter is decreasing, the output of the inverter is reduced. A method for controlling a solar inverter for driving a pump, characterized in that the inverter is stopped when the frequency to be applied becomes equal to or lower than a predetermined frequency lower limit value f L and this state continues for a predetermined time period T OFF .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10220414A JP2000060179A (en) | 1998-08-04 | 1998-08-04 | Method for controlling solar light inverter for driving pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10220414A JP2000060179A (en) | 1998-08-04 | 1998-08-04 | Method for controlling solar light inverter for driving pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000060179A true JP2000060179A (en) | 2000-02-25 |
Family
ID=16750748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10220414A Withdrawn JP2000060179A (en) | 1998-08-04 | 1998-08-04 | Method for controlling solar light inverter for driving pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000060179A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015343A (en) * | 2012-12-31 | 2013-04-03 | 泉州劲鑫电子有限公司 | Solar deceleration strip with night prompting function |
| KR101422884B1 (en) * | 2010-05-06 | 2014-07-24 | 엘에스산전 주식회사 | Photovoltaic Pump System |
| CN104518549A (en) * | 2013-09-27 | 2015-04-15 | Abb公司 | Method and arrangement for controlling solar powered pump |
| CN105099321A (en) * | 2014-05-07 | 2015-11-25 | 山洋电气株式会社 | Motor control device |
| CN107565876A (en) * | 2017-08-28 | 2018-01-09 | 宁波德业变频技术股份有限公司 | A kind of drive system that can make full use of solar energy |
| KR20180068442A (en) * | 2016-12-14 | 2018-06-22 | 엘에스산전 주식회사 | Method for controlling inverter in solar pump system |
| KR101999183B1 (en) * | 2018-05-10 | 2019-07-11 | 엘에스산전 주식회사 | Method for controlling inverter in solar pump system |
-
1998
- 1998-08-04 JP JP10220414A patent/JP2000060179A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101422884B1 (en) * | 2010-05-06 | 2014-07-24 | 엘에스산전 주식회사 | Photovoltaic Pump System |
| CN103015343A (en) * | 2012-12-31 | 2013-04-03 | 泉州劲鑫电子有限公司 | Solar deceleration strip with night prompting function |
| CN104518549A (en) * | 2013-09-27 | 2015-04-15 | Abb公司 | Method and arrangement for controlling solar powered pump |
| CN105099321A (en) * | 2014-05-07 | 2015-11-25 | 山洋电气株式会社 | Motor control device |
| JP2015216709A (en) * | 2014-05-07 | 2015-12-03 | 山洋電気株式会社 | Motor control apparatus |
| CN105099321B (en) * | 2014-05-07 | 2019-02-15 | 山洋电气株式会社 | Motor control assembly |
| KR20180068442A (en) * | 2016-12-14 | 2018-06-22 | 엘에스산전 주식회사 | Method for controlling inverter in solar pump system |
| US10273951B2 (en) | 2016-12-14 | 2019-04-30 | Lsis Co., Ltd. | Solar pump system and method for controlling solar pump system |
| CN107565876A (en) * | 2017-08-28 | 2018-01-09 | 宁波德业变频技术股份有限公司 | A kind of drive system that can make full use of solar energy |
| KR101999183B1 (en) * | 2018-05-10 | 2019-07-11 | 엘에스산전 주식회사 | Method for controlling inverter in solar pump system |
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