JPH0461367B2 - - Google Patents
Info
- Publication number
- JPH0461367B2 JPH0461367B2 JP7298682A JP7298682A JPH0461367B2 JP H0461367 B2 JPH0461367 B2 JP H0461367B2 JP 7298682 A JP7298682 A JP 7298682A JP 7298682 A JP7298682 A JP 7298682A JP H0461367 B2 JPH0461367 B2 JP H0461367B2
- Authority
- JP
- Japan
- Prior art keywords
- amount
- water level
- inflow
- sewage
- pump
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 239000010865 sewage Substances 0.000 claims description 40
- 238000005086 pumping Methods 0.000 claims description 23
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 10
- 238000012937 correction Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Electrical Variables (AREA)
Description
【発明の詳細な説明】
この発明は、下水ポンプ場水量制御装置に関す
るものであり、さらに詳しくいうと、下水ポンプ
場において流入下水量を予測してポンプ揚水量を
制御する下水ポンプ揚水量制御装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sewage pump station water flow rate control device, and more specifically, a sewage pump pumping rate control device that predicts the amount of inflowing sewage and controls the pump pumping rate at a sewage pump station. It is related to.
従来のポンプ揚水量制御装置としは第１図に示
すものがあつた。図において、下水ポンプ場の沈
砂池１に、この沈砂池１の水位を計測する水位計
２を配置する。この水位計２は、沈砂池入口、沈
砂池、ポンプ井、流入渠などに複数個が設置され
ており、その構造により若干の違いがあるが、全
体として沈砂池１全体の水位レベルを示すもので
あるので、ここでは１つの水位計として表わす。
また、どの水位計を使用しても同じような制御方
法を構成することが可能である。また、流入下水
をくみあげる揚水機能を有するポンプ３、この揚
水量を計測する流量計４を備え、さらに、水位計
２の計測値と揚水量より流入下水量を推定する流
入量推定手段５、この推定流入量より水位基準値
を求める変換手段６、プロセスからの水位指示値
と変換手段６で求めた水位基準値より揚水量修正
値を求める水位フイードバツク手段７が接続配置
されてなる装置が使用されていた。 A conventional pump pumping amount control device is shown in FIG. In the figure, a water level gauge 2 for measuring the water level of the settling basin 1 is placed in a settling basin 1 of a sewage pumping station. Multiple water level gauges 2 are installed at the entrance of the settling basin, settling basin, pump well, inflow culvert, etc., and although there are slight differences depending on their structure, they generally indicate the water level of the entire settling basin 1. Therefore, it is represented here as one water level gauge.
Further, it is possible to configure a similar control method no matter which water level gauge is used. It also includes a pump 3 having a pumping function for pumping up inflowing sewage, a flow meter 4 for measuring the amount of pumped water, and an inflow amount estimating means 5 for estimating the amount of inflowing sewage from the measured value of the water level meter 2 and the amount of pumped water. A device is used in which a converting means 6 for calculating a water level reference value from this estimated inflow amount, and a water level feedback means 7 for calculating a pumping amount correction value from the water level instruction value from the process and the water level reference value obtained by the converting means 6 are connected and arranged. It had been.
以上の構成により、流量計４と水位計２から流
入量推定手段５により流入下水量を推定する。流
入量推定手段５による推定手法の概略は次の形で
示される。 With the above configuration, the amount of inflowing sewage is estimated by the inflow amount estimating means 5 from the flow meter 4 and the water level meter 2. An outline of the estimation method by the inflow amount estimating means 5 is shown in the following form.
（流入下水量）＝（揚水量）＋（水面積）
×（単位時間あたりの水位の変化幅）
(1)
ここでもちいたパラメータ「水面積」は、処理
場の土木構造により定まる定数である。ついで、
この流入下水推定値に対応して、特性曲線を有す
る変換手段６により水位基準値を求める。つぎ
に、水位フイードバツク手段７において、この水
位基準値とプロセスの水位指示値より揚水量を修
正する。この揚水量の修正はたとえば次の形で行
われる。 (Inflow sewage volume) = (Pumped water volume) + (Water area) × (Water level change width per unit time)
(1) The parameter “water area” used here is a constant determined by the civil engineering structure of the treatment plant. Then,
Corresponding to this inflow sewage estimated value, a water level reference value is determined by the conversion means 6 having a characteristic curve. Next, the water level feedback means 7 corrects the amount of pumped water based on this water level reference value and the process water level instruction value. This modification of the amount of water pumped is performed, for example, in the following manner.
（揚水量修正値）＝（ゲイン）
×｛（水位指示値）−（水位基準値）｝ (2)
通常、この水位フイードバツク手段７として
は、PID調節機能がよく用いられる。 (Pumping amount correction value) = (Gain) x {(Water level instruction value) - (Water level reference value)} (2) Usually, as this water level feedback means 7, a PID adjustment function is often used.
従来の制御装置は以上のごとくであるので、流
入下水量が変化してもあらかじめ定められたパタ
ーンに沿つて水位基準値を変化させていくだけ
で、流入下水量の大きな変動を吸収することがで
きなかつた。 Conventional control devices are as described above, so even if the amount of inflowing sewage changes, it is possible to absorb large fluctuations in the amount of inflowing sewage by simply changing the water level reference value according to a predetermined pattern. Nakatsuta.
この発明は、上記のような従来のものの欠点を
除去するためになされたもので、推定された流入
下水量の時系列を使用して流入下水量の予測をす
ることにより、流入下水量の大きな変動を吸収す
ることができる下水ポンプ揚水量制御装置を提供
することを目的とするものである。 This invention was made in order to eliminate the drawbacks of the conventional methods as described above, and by predicting the amount of inflowing sewage using the time series of the estimated amount of inflowing sewage, it is possible to predict the amount of incoming sewage. The object of the present invention is to provide a sewage pump pumping amount control device that can absorb fluctuations.
以下、この発明の一実施例を図面を参照して説
明する。第２図において、沈砂池１、水位計２、
ポンプ３、流量計４、および流入量推定手段５は
第１図におけると同様である。ここではさらに、
流入量推定手段５によつて推定された流入下水量
をもとにして流入下水量を予測する流入水予測手
段８、この予測流入下水量に基づいて揚水量基準
値、水位基準値を決定する計画手段９を備えてい
る。７はプロセスからの水位指示値と水位基準値
より揚水量修正値を求める水位フイードバツク手
段である。 An embodiment of the present invention will be described below with reference to the drawings. In Figure 2, sand settling basin 1, water level gauge 2,
The pump 3, flow meter 4, and inflow amount estimating means 5 are the same as in FIG. In addition, here
Inflow water prediction means 8 predicts the amount of inflow sewage based on the amount of inflow sewage estimated by the inflow amount estimating means 5, and determines a pumping amount reference value and a water level reference value based on this predicted inflow sewage amount. A planning means 9 is provided. Reference numeral 7 denotes a water level feedback means for determining a pumped water amount correction value from the water level instruction value from the process and the water level reference value.
次に以上のシステムによる制御装置の動作につ
いて説明する。流量計４と水位計２から流入量推
定手段５により流入下水量を推定し、その流入下
水量推定値を用いて流入量予測手段８により今後
の流入量を予測する。予測の方法としては種々考
えられるが、簡単な方法としては次のような自己
回帰モデルによる方法を繰りかえして予測するも
のがある。 Next, the operation of the control device based on the above system will be explained. The inflow amount estimating means 5 estimates the amount of inflow sewage from the flow meter 4 and the water level meter 2, and the inflow amount predicting means 8 predicts the future inflow amount using the estimated amount of inflow sewage. There are various methods of prediction, but a simple method is to repeat the prediction using an autoregressive model as shown below.
Q^io(k)＝a1Qio（ｋ−１）＋a2Qio
（ｋ−２）＋………＋aoQio（ｋ−ｎ）
(3)
Qio(k)：時間ステツプｋにおける流入下水量実
積値（推定値）
Q^io(k)：時間ステツプとにおける流入下水量予
測値
a1，……ao：自己回帰モデルパラメータ
次いで、流入量予測手段８によつて求められた
流入下水量の予測値の時系列を用いて、下水ポン
プ場の貯留能力および揚水能力を考えて揚水量基
準値を決定する。その決定の方法について以下に
説明する。 Q^ io (k)=a 1 Q io (k-1)+a 2 Q io (k-2)+......+a o Q io (k-n) (3) Q io (k): Time step k Actual value (estimated value) of inflow sewage volume at Q^ io (k): Predicted value of inflow sewage volume at time step a 1 ,...a o : Autoregressive model parameter Next, calculated by inflow volume prediction means 8 Using the time series of predicted values of inflow sewage volume, the pumping amount reference value is determined by considering the storage capacity and pumping capacity of the sewage pumping station. The method for making this determination will be explained below.
下水ポンプ場への流入下水量として予測値を用
いれば、
下水ポンプ場の水位h*(k)の上下限条件
hnio＜h*(k)＜hnax
但し（ｋ＝１，２……Ｎ）
下水ポンプ場の揚水量Qx(k)の能力の上下限
条件
Qnio＜Q*(k)＜Qnax
但し、（ｋ＝１，２，……Ｎ）
の制約条件と、
評価関数Ｊ＝W1Σ（hx(k)−H*）2
＋W2Σ（Qx（ｋ−１）−Qx(k)）2
＋W3Σ（Qx(k)）2 (4)
但し、W1，W2，W3は重み係数
Hxは沈砂池の水位目標値
hxは水位基準値
Qxは揚水量基準値
ｋは制御ステツプである。 If the predicted value is used as the amount of sewage flowing into the sewage pumping station, the upper and lower limit conditions for the water level h * (k) at the sewage pumping station h nio < h * (k) < h nax where (k = 1, 2...N ) Upper and lower limit conditions for the capacity of the sewage pumping station Q =W 1 Σ(h x (k)−H * ) 2 +W 2 Σ(Q x (k−1)−Q x (k)) 2 +W 3 Σ(Q x (k)) 2 (4) However, W 1 , W 2 , W 3 are weighting coefficients H x is the target water level of the settling basin h x is the water level reference value Q x is the pumped water reference value k is the control step.
なる評価関数Ｊを最小とする各ステツプ毎の揚水
量Qx(k)を決定できる。なお、水位目標値Hxは、
水位一定制御の目標値であり、水位基準hxは水位
一定制御のための各時点での制御基準値である。The water pumping amount Q x (k) for each step that minimizes the evaluation function J can be determined. In addition, the water level target value H x is
This is a target value for constant water level control, and the water level reference h x is a control reference value at each point in time for constant water level control.
このようにして決定された揚水量Qx(k)を揚水
量基準値とする。さらに、流入下水量予測値ｑ(k)
とこの揚水量基準基準値を用いれば、計画手段９
において次の演算式で水位基準値が求められる。 The pumped water amount Q x (k) determined in this way is set as the pumped water amount reference value. Furthermore, the predicted amount of inflow sewage q(k)
If this standard value of pumped water is used, planning method 9
The water level reference value is determined using the following formula.
hx（ｋ＋１）＝hx(k)＋１／Ｓ（ｈ(k)） ｛qx(k)−Qx(k)｝ (5) 但し、hxは挺位基準値 Ｓ（ｈ(k)）水面積 qxは流入予測値である。 h x (k+1)=h x (k)+1/S(h(k)) {q x (k)−Q x (k)} (5) However, h x is the elevation reference value S(h(k )) Water area q x is the predicted inflow value.
次いで、水位フイードバツク手段７においては
計画手段９によつて求められた次のステツプの水
位基準値hx（ｋ＋１）と水位計２の水位指示値の
偏差を入力し、これらの偏差に応じてポンプ操作
をフイードバツク修正することにより揚水量基準
値の修正を行う。即ち、計画手段９により求めた
揚水量基準値によるポンプ３の操作量に水位フイ
ードバツク手段の出力を加えて修正された操作量
によりポンプ３が制御される。以上により、流入
下水量予測の予測誤差を吸収することができ、適
切なポンプ操作修正量によつて下水ポンプ揚水量
が制御される。 Next, the water level feedback means 7 inputs the deviation between the water level reference value h x (k+1) for the next step obtained by the planning means 9 and the water level indication value of the water level gauge 2, and adjusts the pump according to these deviations. The standard value of pumped water is corrected by feedback correction of the operation. That is, the pump 3 is controlled by the operation amount corrected by adding the output of the water level feedback means to the operation amount of the pump 3 based on the water pumping amount reference value determined by the planning means 9. As described above, the prediction error in predicting the amount of inflowing sewage can be absorbed, and the amount of water pumped by the sewage pump is controlled by an appropriate amount of pump operation correction.
なお、上記実施例においては、揚水量の計測手
段として流量計４を設けたものを示したが、流量
計の代わりにポンプの圧力−流量特性を利用して
もよい。 In the above embodiment, a flow meter 4 is provided as a means for measuring the amount of pumped water, but the pressure-flow rate characteristic of the pump may be used instead of the flow meter.
また、上記実施例の流入量推定手段５に雨量情
報を入れて推定の精度を高める方法をとつてもよ
い。 Alternatively, a method may be adopted in which rainfall information is input into the inflow amount estimating means 5 of the above embodiment to improve estimation accuracy.
以上のように、この発明によれば、流入下水量
予測を行い、その予測にもとずく計画機能により
揚水量基準値、水位基準値を決定し、水位フイー
ドバツクによりその予測誤差を吸収するようにし
たので、流入下水量の変動を吸収する効果があ
る。 As described above, according to the present invention, the amount of inflowing sewage is predicted, the pumping amount standard value and the water level standard value are determined by the planning function based on the prediction, and the prediction error is absorbed by the water level feedback. Therefore, it has the effect of absorbing fluctuations in the amount of inflowing sewage.
第１図は従来の方法における装置の構成図、第
２図はこの発明の一実施例に使用する装置の構成
図である。
図において、１は沈砂池、２水位計、３はポン
プ、４は流量計、５は流入量推定手段、７は水位
フイードバツク手段、８は流入量予測手段、９は
計画手段を示す。なお、図中、同一符号は同一ま
たは相当部分を示す。
FIG. 1 is a block diagram of a device used in a conventional method, and FIG. 2 is a block diagram of a device used in an embodiment of the present invention. In the figure, 1 is a settling basin, 2 is a water level gauge, 3 is a pump, 4 is a flow meter, 5 is an inflow amount estimation means, 7 is a water level feedback means, 8 is an inflow amount prediction means, and 9 is a planning means. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
流量計によるポンプの流量計測値とから流入下水
量を推定する流入量推定手段と、前記流入量推定
手段の出力する推定値が入力され、該推定値を基
に次後の流入下水量を予測する流入量予測手段
と、前記流入量予測手段の出力する流入下水量予
測値を入力し、水位一定、かつ、前記ポンプの揚
水量の変化抑制のための評価関数を最小とする揚
水量基準値を求めるとともに、この揚水量基準値
と前記流入下水量予測値とから次のステツプの水
位基準値信号を出力する計画手段と、前記計画手
段の出力が入力され、前記計画手段によつて求め
られた次のステツプの水位基準値と前記水位計の
水位指示値との偏差に応じた信号を出力する水位
フイードバツク手段とを備え、前記計画手段の揚
水量基準値を前記水位フイードバツク手段の出力
で修正した信号により前記ポンプの流量を制御す
ることを特徴とする下水ポンプ揚水量制御装置。1 Water level measurements at the sewage pump station using water level gauges,
An inflow amount estimating means for estimating the amount of inflow sewage based on the flow rate measurement value of the pump by a flow meter, and an estimated value outputted from the inflow amount estimating means is input, and the next amount of inflow sewage is predicted based on the estimated value. inputting an inflow amount prediction means for predicting an inflow amount, and a predicted value of inflow sewage amount outputted by the inflow amount prediction means, and a pumping amount reference value that maintains a constant water level and minimizes an evaluation function for suppressing changes in the pumping amount of the pump. and a planning means for outputting a water level reference value signal for the next step based on the pumped water reference value and the predicted inflow sewage amount; and water level feedback means for outputting a signal according to the deviation between the water level reference value of the next step and the water level indication value of the water level meter, and the water pumping amount reference value of the planning means is corrected by the output of the water level feedback means. A sewage pump pumping amount control device, characterized in that the flow rate of the pump is controlled by a signal generated by the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7298682A JPS58189712A (en) | 1982-04-29 | 1982-04-29 | Method for controlling pumping-up volume of sewage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7298682A JPS58189712A (en) | 1982-04-29 | 1982-04-29 | Method for controlling pumping-up volume of sewage pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58189712A JPS58189712A (en) | 1983-11-05 |
| JPH0461367B2 true JPH0461367B2 (en) | 1992-09-30 |
Family
ID=13505218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7298682A Granted JPS58189712A (en) | 1982-04-29 | 1982-04-29 | Method for controlling pumping-up volume of sewage pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189712A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01175613A (en) * | 1987-12-29 | 1989-07-12 | Toshiba Corp | Pump controller |
| JPH03115786A (en) * | 1989-09-28 | 1991-05-16 | Toshiba Corp | Pump control device for sanitary sewage pump equipment |
| CN106354168B (en) * | 2016-10-14 | 2019-02-05 | 江苏大学镇江流体工程装备技术研究院 | A kind of concatenated water supply pump station feedback control system of same pump |
-
1982
- 1982-04-29 JP JP7298682A patent/JPS58189712A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58189712A (en) | 1983-11-05 |
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