JP2008063982A - Water delivery control method, its device, and water delivery control system using the method and device - Google Patents
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Abstract
Description
本発明は、複数台の送水ポンプを圧力変動が無く安定して送水するための送水制御装置に関するものである。 The present invention relates to a water supply control device for stably supplying water to a plurality of water pumps without pressure fluctuation.
上水道施設において、受水槽や配水池へ送水・配水する際、大きく変動する需要量に対応するため、２台以上の複数台ポンプを並列運転させかつ回転数制御することで、きめ細かな制御を行っている。
従来、複数台の送水ポンプを制御する送水制御装置を用いたシステムは、図３のようになっている。図において、１は送水制御装置、２は圧力計、３は流量計、４、５はモータ制御装置、６は先起動する第１ポンプ、７は後起動する第２ポンプ、８、９は吐出弁、１０は圧力指令である。送水制御装置１はポンプ切替判断部１１と、圧力調整部１３と、モータ運転指令部１４とからなっている。
この送水制御装置はつぎのように動作する。すなわち、送水量は時々刻々と変動しているが、安定した送水圧力を常に確保できるように、圧力調整部１３において圧力計２の現在値と圧力指令１０（設定値）の偏差をなくすためのポンプの回転数を演算し、モータ運転指令部１４からモータ制御装置４へ回転数の指令値を渡し制御している。夜間などの小流量になる時間帯においては、第１ポンプ６の１台のみが運転を行う。送水量が増加するにつれ回転数を増加するように指令を行うが、流量の現在値が第１ポンプ６の送水可能な最大流量を越えると、ポンプ切替判断部１１にて、ポンプを切替えることを判断する。第２ポンプ９は運転指令により起動するとともに、吐出側の圧力が上昇したことを確認し、吐出弁９を開くことで、送水を開始する。次に、第１ポンプ６は、停止指令により、吐出弁８を閉め停止させる。この様な制御により、広範囲の需要量に対して、安定した水圧と流量を供給している。
また、他の従来例として、ポンプの運転台数を追加しても配水の圧力が低下しないように運転中の流量制御余裕代を合計した総合的な余裕代を差し引いた配水量に達したときに追加運転するものも提案されている(例えば、特許文献１参照)。
Conventionally, a system using a water supply control device for controlling a plurality of water supply pumps is as shown in FIG. In the figure, 1 is a water supply control device, 2 is a pressure gauge, 3 is a flow meter, 4 and 5 are motor control devices, 6 is a first pump that starts first, 7 is a second pump that starts later, and 8 and 9 are discharges. Valves 10 are pressure commands. The water supply control device 1 includes a pump switching determination unit 11, a pressure adjustment unit 13, and a motor operation command unit 14.
This water supply control device operates as follows. That is, although the amount of water supply fluctuates every moment, the pressure adjustment unit 13 eliminates the deviation between the current value of the pressure gauge 2 and the pressure command 10 (set value) so that a stable water supply pressure can always be secured. The number of revolutions of the pump is calculated, and a command value for the number of revolutions is passed from the motor operation command unit 14 to the motor control device 4 for control. Only one of the first pumps 6 operates in a time zone where the flow rate is low, such as at night. A command is given to increase the rotational speed as the amount of water supplied increases, but when the current value of the flow rate exceeds the maximum flow rate that can be supplied by the first pump 6, the pump switching determination unit 11 switches the pump. to decide. The second pump 9 is activated by an operation command, confirms that the pressure on the discharge side has increased, and opens the discharge valve 9 to start water supply. Next, the first pump 6 closes and stops the discharge valve 8 according to the stop command. By such control, stable water pressure and flow rate are supplied for a wide range of demand.
In addition, as another conventional example, when the amount of water distribution reaches the total amount of allowance, the total amount of allowance for flow control during operation is deducted so that the pressure of the water distribution does not decrease even if the number of operating pumps is added. An additional operation is also proposed (see, for example, Patent Document 1).
ところが、従来のポンプ複数台の並列運転において、容量の異なるポンプを切替える場合、後から起動するポンプの吐出側の圧力が、先に起動しているポンプの運転圧力より大きいと、先起動しているポンプは圧力で後発のポンプに負けてしまい、切替中に、第１ポンプは、運転しているが流量が流れない締め切り状態となってしまう。締切り運転はポンプを過熱させるため、寿命を損なうことに加え、無送水が発生することによるシステム非常停止を引き起こし、送水圧力、流量が安定的に確保できなくなるという問題もある。
そこで本発明は、容量の異なるポンプ複数台を切り替えながら運転する際に、安定な水量と圧力を確保でき、ポンプの締切り状態を無くすことで送水制御システムを安全に運転することを目的とするものである。
However, when switching pumps with different capacities in the parallel operation of a plurality of conventional pumps, if the pressure on the discharge side of the pump that is activated later is greater than the operating pressure of the pump that has been activated earlier, The pump is defeated by the later pump due to the pressure, and during the switching, the first pump is in a closed state where the operation is performed but the flow rate does not flow. The shut-off operation overheats the pump, resulting in a problem that the life of the pump is shortened and an emergency stop of the system occurs due to the occurrence of non-feeding water, so that the feeding pressure and flow rate cannot be secured stably.
Therefore, the present invention aims to ensure a stable amount of water and pressure when operating while switching a plurality of pumps having different capacities, and to safely operate the water supply control system by eliminating the pump cutoff state. It is.
上記問題を解決するために、本発明はつぎのように構成したものである。
請求項１に記載の発明は、設定圧力値と計測値との偏差から適正な圧力値を演算する圧力調節部と、前記圧力調節部の結果を基に複数の送水ポンプのモータ制御装置に送る制御指令を演算するモータ運転指令部と、送水量の変動により容量の異なる前記ポンプへの切替えを判断するポンプ切替判断部とを有し、複数のポンプを並列運転させながら、送水量の変動により回転数を制御し、ポンプの切替え制御を行う送水制御方法において、前記ポンプを切替える際に、後起動の第２ポンプの起動時の吐出圧力が先起動の第１ポンプの吐出圧力より小さくなるように前記第２ポンプの回転数を速度演算部により制御するものである。
請求項２に記載の発明は、前記速度演算部が第１ポンプの特性曲線を記憶した第１特性曲線記憶部と、前記第１ポンプの現在の吐出圧力を演算する吐出圧演算部と、前記吐出圧力の演算値を記憶する吐出圧記憶部と、前記第２ポンプの特性曲線を記憶した第２特性曲線記憶部と、前記第２ポンプに指令する回転数を演算する回転数演算部と、前記演算した回転数を第２ポンプへ指令する回転数指令部とからなるものである。
請求項３に記載の発明は、前記吐出圧演算部が前記第１ポンプの第１特性曲線記憶部の特性曲線と現在の流量および回転数から吐出圧力を演算するものである。
請求項４に記載の発明は、前記回転数演算部が前記第２ポンプの第２特性曲線記憶部の特性曲線から前記第１ポンプの現在の吐出圧より小さい値となる前記第２ポンプの回転数を演算するものである。
請求項５に記載の発明は、前記回転数指令部は、前記第１ポンプの現在の吐出圧より小さい値となる回転数を前記第２ポンプに指令するものである。
請求項６に記載の発明は、設定圧力値と計測値との偏差から適正な圧力指令値を演算する圧力調節部と、前記圧力調節部の結果を基に複数の送水ポンプのモータ制御装置に送る制御指令を演算するモータ運転指令部と、送水量の変動により容量の異なる前記ポンプへの切替えを判断するポンプ切替判断部とからなり、前記複数のポンプを並列運転させながら、送水量の変動により回転数を制御し、ポンプの切替え制御を行う送水制御装置において、前記ポンプ切替判断部と前記モータ運転指令部との間に、第２ポンプの起動時の吐出圧力が先起動の第１ポンプの吐出圧力より小さくなるようにする速度演算部を設けたものである。
請求項７に記載の発明は、前記速度演算部は、先起動の第１ポンプの特性曲線を記憶した第１特性曲線記憶部と、前記第１ポンプの現在の吐出圧力を演算する吐出圧演算部と、前記吐出圧力の演算値を記憶する吐出圧記憶部と、前記第２ポンプの特性曲線を記憶した第２特性曲線記憶部と、前記第２ポンプに指令する回転数を演算する回転数演算部と、前記演算した回転数を第２ポンプへ指令する回転数指令部とからなるものである。
請求項８に記載の発明は、前記吐出圧力演算部は、前記第１ポンプの第１特性曲線記憶部の特性曲線と現在の流量および回転数から吐出圧力を演算するものである。
請求項９に記載の発明は、前記回転数演算部は、前記第２ポンプの特性曲線記憶部の特性曲線から前記第１ポンプの現在の吐出圧以下となる前記第２ポンプの回転数を演算するものである。
請求項１０に記載の発明は、前記回転数指令部は、前記第１ポンプの現在の吐出圧より小さい回転数を前記第２ポンプに指令するものである。
請求項１１に記載の発明は、請求項６から請求項１０記載の送水制御装置と、複数の送水ポンプと、前記送水ポンプを駆動させるモータ制御装置と、前記送水ポンプの吐出側に設けられた吐出弁と、吐出弁の後段に設けられた圧力計および流量計とを備えた送水制御システムである。
In order to solve the above problems, the present invention is configured as follows.
According to the first aspect of the present invention, the pressure adjusting unit that calculates an appropriate pressure value from the deviation between the set pressure value and the measured value, and the results of the pressure adjusting unit are sent to the motor control devices of the plurality of water pumps. A motor operation command unit that calculates a control command, and a pump switching determination unit that determines switching to the pump having a different capacity due to fluctuations in the water supply amount, while operating a plurality of pumps in parallel, In the water supply control method for controlling the number of rotations and performing pump switching control, when the pump is switched, the discharge pressure at the time of starting the second pump that is started later becomes smaller than the discharge pressure of the first pump that is started first. The speed of the second pump is controlled by a speed calculator.
The invention according to claim 2 is a first characteristic curve storage unit in which the speed calculation unit stores a characteristic curve of the first pump, a discharge pressure calculation unit that calculates a current discharge pressure of the first pump, A discharge pressure storage unit that stores a calculated value of the discharge pressure; a second characteristic curve storage unit that stores a characteristic curve of the second pump; a rotation number calculation unit that calculates a rotation number commanded to the second pump; A rotation speed command unit for commanding the calculated rotation speed to the second pump.
According to a third aspect of the present invention, the discharge pressure calculation unit calculates the discharge pressure from the characteristic curve of the first characteristic curve storage unit of the first pump, the current flow rate, and the rotation speed.
According to a fourth aspect of the present invention, the rotation speed of the second pump is such that the rotation speed calculation unit is smaller than the current discharge pressure of the first pump from the characteristic curve of the second characteristic curve storage unit of the second pump. Numbers are calculated.
According to a fifth aspect of the present invention, the rotation speed command unit commands the second pump to rotate at a value smaller than the current discharge pressure of the first pump.
The invention according to claim 6 is a pressure adjusting unit that calculates an appropriate pressure command value from a deviation between a set pressure value and a measured value, and a plurality of water pump motor control devices based on the result of the pressure adjusting unit. It consists of a motor operation command unit that calculates a control command to be sent and a pump switching judgment unit that judges switching to the pump having a different capacity due to fluctuations in the water supply amount, and changes the water supply amount while operating the plurality of pumps in parallel. In the water supply control device that controls the number of rotations and controls the switching of the pump, the first pump whose discharge pressure at the start of the second pump is the first start between the pump switch determination unit and the motor operation command unit Is provided with a speed calculation unit that makes the discharge pressure lower than the discharge pressure.
According to a seventh aspect of the present invention, the speed calculation unit includes a first characteristic curve storage unit that stores a characteristic curve of the first pump that has been activated first, and a discharge pressure calculation that calculates a current discharge pressure of the first pump. A discharge pressure storage unit that stores a calculated value of the discharge pressure, a second characteristic curve storage unit that stores a characteristic curve of the second pump, and a rotational speed that calculates a rotational speed commanded to the second pump The calculation unit includes a rotation number command unit that commands the calculated rotation number to the second pump.
According to an eighth aspect of the present invention, the discharge pressure calculation unit calculates the discharge pressure from the characteristic curve of the first characteristic curve storage unit of the first pump, the current flow rate, and the rotational speed.
According to a ninth aspect of the present invention, the rotational speed calculation unit calculates the rotational speed of the second pump that is equal to or lower than the current discharge pressure of the first pump from the characteristic curve of the characteristic curve storage unit of the second pump. To do.
According to a tenth aspect of the present invention, the rotation speed command unit commands the second pump to have a rotation speed smaller than a current discharge pressure of the first pump.
Invention of Claim 11 was provided in the discharge side of the water supply control apparatus of Claims 6-10, a several water pump, the motor control apparatus which drives the water pump, and the water pump It is a water supply control system provided with a discharge valve, and a pressure gauge and a flow meter provided in a subsequent stage of the discharge valve.
請求項１および６に記載の発明によると、後起動の第２ポンプの圧力を先起動の第１ポンプの運転点より小さくしたので、第１ポンプが締切り運転で過熱損傷するのを防ぐことができ安全性の高い送水制御装置が得られる。
請求項２および７に記載の発明によると、第１、第２のポンプの特性曲線を記憶し制御回転数を判定することができるので、ポンプが締切り運転で過熱損傷するのを防ぐことができる。
請求項３および８に記載の発明によると、第１ポンプの運転点を自動で演算できるので、圧力計器が無い場合でも、現在の運転点を演算でき、設備を追加する必要が無い。
請求項４および９に記載の発明によると、第２のポンプの圧力が先起動のポンプの運転点以下になるように回転数を決定できるので、第１ポンプが締切り運転で過熱損傷するのを防ぐことができる。
請求項５および１０に記載の発明によると、第２ポンプの圧力が第１ポンプの運転点より小さい回転数を指令できるので、無送水が発生することによるシステムの非常手停止を引き起こすことを防ぐことができるため操作性がよい。
請求項１１に記載の発明によると、システムを非常停止させることなく水を供給できる自動制御システムを構築できる。
According to the first and sixth aspects of the present invention, since the pressure of the second pump that is started later is made smaller than the operating point of the first pump that is started first, it is possible to prevent the first pump from being damaged due to overheating in the cutoff operation. A highly safe water supply control device can be obtained.
According to the second and seventh aspects of the present invention, since the characteristic curves of the first and second pumps can be stored and the control rotation speed can be determined, it is possible to prevent the pump from being overheated by the shutoff operation. .
According to the third and eighth aspects of the invention, since the operating point of the first pump can be automatically calculated, even if there is no pressure gauge, the current operating point can be calculated and there is no need to add equipment.
According to the inventions described in claims 4 and 9, since the rotation speed can be determined so that the pressure of the second pump is equal to or lower than the operating point of the pump that has been previously activated, the first pump is prevented from being damaged due to overheating in the cutoff operation. Can be prevented.
According to the fifth and tenth aspects of the present invention, since the rotation speed of the second pump can be instructed to be smaller than the operating point of the first pump, it is possible to prevent an emergency stop of the system due to the occurrence of non-feed water. Therefore, operability is good.
According to the eleventh aspect of the present invention, it is possible to construct an automatic control system that can supply water without causing an emergency stop of the system.
以下、本発明の実施の形態について図を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図１は、本発明の実施例を示す送水制御システムのブロック図である。図において、１２は速度演算部である。本発明の送水制御装置１は、ポンプ切替判断部１１、速度演算部１２、圧力調整部１３、モータ運転指令部１４からなる。なお、従来と同じ構成要素については同じ符号を付してその説明を省略し、異なる点のみ説明する。
本発明が従来技術と異なる構成は、速度演算部１２を設けた点である。
速度演算部１２の詳細を図２のブロック図に示す。図において、１２ａは先起動の第１ポンプ６の特性曲線を予め記憶させた第１曲線記憶部、１２ｂは第１ポンプ６の吐出圧を演算する吐出圧演算部、１２ｃは第１ポンプ６の吐出圧を記憶する吐出圧記憶部、１２ｄは後起動の第２ポンプ７の特性曲線を記憶させた第２曲線記憶部、１２ｅは第２ポンプ７の回転数を演算する回転数演算部、１２ｆは第２ポンプ７の回転数指令を送る回転数指令部である。
吐出圧演算部１２ｂは、第１曲線記憶部の値と流量現在値から、吐出圧力を演算する。回転数演算部１２ｅは、吐出圧記憶部１２ｃに記憶された吐出圧よりも圧力が下回るように第２ポンプ７の回転数を演算する。ポンプ切替判断部１１で、次のポンプを起動すると判断した場合に、圧力調整部１３に代って、ポンプに回転数指令を与える。
次に、本発明の送水制御装置の動作について図３を用いて説明する。図３は第１ポンプ６と第２ポンプ７の特性曲線である。
第１ポンプ６は送水流量が変化しても、吐出圧力が一定になるように圧力調整部１３で制御されているか、もしくは、第１ポンプ６は固定回転数で運転されているとする。
送水管の流量がＱ１を越えると、第１ポンプ６だけでは、流量をまかなえない事から、ポンプ切替判断部１１は第２ポンプ７を起動し、送水圧力が確立したら第１ポンプ６を停止するよう指令することとなる。
その手順は、まず、第１ポンプ６の吐出圧演算部１２ｂにて、第１ポンプ６の吐出圧を演算する。すなわち、現在の回転数、流量現在値と第１特性曲線記憶部１２ａから読み出した特性曲線の値から吐出圧を算出する。図ではＡ点がポンプ運転点であり、吐出圧をＨ１として第１ポンプ６の吐出圧記憶部に記憶する。
次に、第２ポンプ７の回転数演算部１２ｅにて、第２ポンプ７に指令する回転数を演算する。
第２ポンプ７の特性曲線記憶部１２ｄにて記憶された特性曲線より、第２ポンプ７の回転数演算部１２ｅでは、流量がゼロ地点において第１ポンプ６の吐出圧Ｈ１を下回る回転数を割り出す。
算出された回転数を回転数指令部１２ｆでは、第２ポンプ７の回転数指令値としてモータ運転指令部１４へ送り、第２ポンプ７のモータ制御装置５へ与える。第２ポンプ７は起動を開始すると共に、指令回転数まで上昇し、圧力が上昇したことを確認し、吐出弁９を開くとともに、第１ポンプ６を停止させる指令をする。指令により、第１ポンプ６の吐出弁８は閉じ、その後、第１ポンプ６を停止させる。
第１ポンプ６が完全に停止した後、圧力現在値が圧力設定値になるように圧力調整部１３で第２ポンプ７の制御を行う。
この様にすることで、第１ポンプ６は、第２ポンプ７が起動すると同時に、無送水状態になることを避けることができるため、システムを異常停止させることなく、また締切り運転によるポンプの過熱を防止できることから、いかなる場合でも、給水を断つことなく、安定して送水することができる。
なお、第２ポンプ７から第１ポンプ６に切り替える場合(容量の大きいポンプから容量の小さいポンプに切り替える場合)も同様にして、第２ポンプの特性曲線の吐出圧よりも圧力が下回るようにする。
また、本実施例では容量の小さいポンプ１台と容量の大きいポンプ１台について説明したが、これに限らず、容量の種類は何種類でもよく、同じ容量のものを複数台配置した場合でも適用できる。本発明は容量の異なるポンプを切り替える際に適用できるものである。
FIG. 1 is a block diagram of a water supply control system showing an embodiment of the present invention. In the figure, reference numeral 12 denotes a speed calculation unit. The water supply control device 1 of the present invention includes a pump switching determination unit 11, a speed calculation unit 12, a pressure adjustment unit 13, and a motor operation command unit 14. In addition, the same code | symbol is attached | subjected about the same component as the past, the description is abbreviate | omitted, and only a different point is demonstrated.
The configuration in which the present invention is different from the prior art is that a speed calculation unit 12 is provided.
Details of the speed calculator 12 are shown in the block diagram of FIG. In the figure, 12a is a first curve storage unit that pre-stores the characteristic curve of the first pump 6 that has been activated first, 12b is a discharge pressure calculation unit that calculates the discharge pressure of the first pump 6, and 12c is the first pump 6's. A discharge pressure storage unit that stores the discharge pressure, 12d is a second curve storage unit that stores a characteristic curve of the second pump 7 that is started later, 12e is a rotation number calculation unit that calculates the rotation number of the second pump 7, 12f Is a rotation speed command section for sending a rotation speed command of the second pump 7.
The discharge pressure calculation unit 12b calculates the discharge pressure from the value in the first curve storage unit and the current flow rate value. The rotation speed calculation unit 12e calculates the rotation speed of the second pump 7 so that the pressure is lower than the discharge pressure stored in the discharge pressure storage unit 12c. When the pump switching determination unit 11 determines that the next pump is to be started, a rotation speed command is given to the pump instead of the pressure adjustment unit 13.
Next, operation | movement of the water supply control apparatus of this invention is demonstrated using FIG. FIG. 3 is a characteristic curve of the first pump 6 and the second pump 7.
It is assumed that the first pump 6 is controlled by the pressure adjusting unit 13 so that the discharge pressure becomes constant even when the water supply flow rate changes, or the first pump 6 is operated at a fixed rotational speed.
When the flow rate of the water pipe exceeds Q1, the first pump 6 alone cannot provide the flow rate, so the pump switching determination unit 11 starts the second pump 7 and stops the first pump 6 when the water pressure is established. Will be commanded.
In the procedure, first, the discharge pressure of the first pump 6 is calculated by the discharge pressure calculator 12 b of the first pump 6. That is, the discharge pressure is calculated from the current rotation speed, the current flow rate value, and the value of the characteristic curve read from the first characteristic curve storage unit 12a. In the figure, point A is the pump operating point, and the discharge pressure is stored in the discharge pressure storage unit of the first pump 6 as H1.
Next, the rotational speed command section 12e of the second pump 7 calculates the rotational speed commanded to the second pump 7.
From the characteristic curve stored in the characteristic curve storage unit 12d of the second pump 7, the rotational speed calculation unit 12e of the second pump 7 calculates the rotational speed below the discharge pressure H1 of the first pump 6 at the zero flow rate. .
In the rotation speed command section 12 f, the calculated rotation speed is sent to the motor operation command section 14 as the rotation speed command value of the second pump 7 and is given to the motor control device 5 of the second pump 7. The second pump 7 starts to be started, rises to the command rotational speed, confirms that the pressure has risen, opens the discharge valve 9 and gives a command to stop the first pump 6. According to the command, the discharge valve 8 of the first pump 6 is closed, and then the first pump 6 is stopped.
After the first pump 6 is completely stopped, the pressure adjusting unit 13 controls the second pump 7 so that the current pressure value becomes the pressure set value.
In this way, the first pump 6 can avoid the non-water-feeding state at the same time as the second pump 7 is started, so that the system can be overheated without shutting down the system abnormally and without being shut down. Therefore, in any case, it is possible to stably feed water without cutting off water supply.
Similarly, when switching from the second pump 7 to the first pump 6 (when switching from a pump with a large capacity to a pump with a small capacity), the pressure should be lower than the discharge pressure of the characteristic curve of the second pump. .
In this embodiment, one small capacity pump and one large capacity pump have been described. However, the present invention is not limited to this, and any number of capacity types may be used. it can. The present invention can be applied when switching pumps having different capacities.
このように、本発明による送水制御装置は、ポンプの切替をスムーズに行えることから、断水を引き起こすことがなく、ポンプの締切り運転をなくすことからポンプの過熱損傷を防ぐことができるので、安定した水の供給ができる。 Thus, since the water supply control device according to the present invention can smoothly switch the pump, it does not cause water shutoff, and can prevent overheating damage to the pump by eliminating the shutoff operation of the pump. Can supply water.
１ 送水制御装置
２ 圧力計
３ 流量計
４、５ モータ制御装置
６ 第１ポンプ
７ 第２ポンプ
８、９ 吐出弁
１０ 圧力指令
１１ ポンプ切替判断部
１２ 速度演算部
１２ａ 第１特性曲線記憶部
１２ｂ 吐出圧演算部
１２ｃ 吐出圧記憶部
１２ｄ 第２特性曲線記憶部
１２ｅ 回転数演算部
１２ｆ 回転数指令部
１３ 圧力調節部
１４ モータ運転指令部
DESCRIPTION OF SYMBOLS 1 Water supply control apparatus 2 Pressure gauge 3 Flowmeter 4, 5 Motor control apparatus 6 1st pump 7 2nd pump 8, 9 Discharge valve 10 Pressure command 11 Pump switching judgment part 12 Speed calculation part 12a 1st characteristic curve memory | storage part 12b Discharge Pressure calculation unit 12c Discharge pressure storage unit 12d Second characteristic curve storage unit 12e Rotation number calculation unit 12f Rotation number command unit 13 Pressure adjustment unit 14 Motor operation command unit
Claims (11)
前記ポンプを切替える際に、後起動の第２ポンプの起動時の吐出圧力が先起動の第１ポンプの吐出圧力より小さくなるように前記第２ポンプの回転数を速度演算部により制御することを特徴とする送水制御方法。 A pressure adjustment unit that calculates an appropriate pressure value from the deviation between the set pressure value and the measured value, and a motor operation command unit that calculates a control command to be sent to the motor control devices of a plurality of water pumps based on the result of the pressure adjustment unit And a pump switching determination unit that determines whether to switch to a pump with a different capacity due to fluctuations in the water supply amount, while controlling the number of rotations according to fluctuations in the water supply amount while operating a plurality of pumps in parallel. In the water supply control method
When the pump is switched, the speed calculation unit controls the rotational speed of the second pump so that the discharge pressure at the time of starting the second pump that is started later becomes smaller than the discharge pressure of the first pump that is started first. A characteristic water supply control method.
前記ポンプ切替判断部と前記モータ運転指令部との間に、第２ポンプの起動時の吐出圧力が先起動の第１ポンプの吐出圧力より小さくなるようにする速度演算部を設けたことを特徴とする送水制御装置。 A pressure adjustment unit that calculates an appropriate pressure command value from the deviation between the set pressure value and the measured value, and a motor operation command that calculates a control command to be sent to the motor control devices of a plurality of water pumps based on the result of the pressure adjustment unit And a pump switching determination unit that determines switching to the pump having a different capacity due to fluctuations in the amount of water supplied, while controlling the number of rotations according to fluctuations in the amount of water supplied while operating the plurality of pumps in parallel. In the water supply control device that performs switching control,
A speed calculation unit is provided between the pump switching determination unit and the motor operation command unit so that the discharge pressure at the time of starting the second pump becomes smaller than the discharge pressure of the first pump that has been started first. Water supply control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006241080A JP2008063982A (en) | 2006-09-06 | 2006-09-06 | Water delivery control method, its device, and water delivery control system using the method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006241080A JP2008063982A (en) | 2006-09-06 | 2006-09-06 | Water delivery control method, its device, and water delivery control system using the method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2008063982A true JP2008063982A (en) | 2008-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2006241080A Pending JP2008063982A (en) | 2006-09-06 | 2006-09-06 | Water delivery control method, its device, and water delivery control system using the method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2101417A2 (en) | 2008-03-13 | 2009-09-16 | Nec Corporation | Device and method for demodulating control signals |
| KR101045791B1 (en) * | 2011-02-28 | 2011-07-04 | 한국그런포스펌프(주) | Method for controlling pump system including multiple pumps |
| JP2018200584A (en) * | 2017-05-29 | 2018-12-20 | 株式会社荏原製作所 | Water supplying system and water supplying method |
-
2006
- 2006-09-06 JP JP2006241080A patent/JP2008063982A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2101417A2 (en) | 2008-03-13 | 2009-09-16 | Nec Corporation | Device and method for demodulating control signals |
| KR101045791B1 (en) * | 2011-02-28 | 2011-07-04 | 한국그런포스펌프(주) | Method for controlling pump system including multiple pumps |
| JP2018200584A (en) * | 2017-05-29 | 2018-12-20 | 株式会社荏原製作所 | Water supplying system and water supplying method |
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