JP3221243B2 - Rainwater pump operating number control device - Google Patents
Rainwater pump operating number control deviceInfo
- Publication number
- JP3221243B2 JP3221243B2 JP18382894A JP18382894A JP3221243B2 JP 3221243 B2 JP3221243 B2 JP 3221243B2 JP 18382894 A JP18382894 A JP 18382894A JP 18382894 A JP18382894 A JP 18382894A JP 3221243 B2 JP3221243 B2 JP 3221243B2
- Authority
- JP
- Japan
- Prior art keywords
- water level
- pump
- rainwater
- pump well
- pumps
- 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 - Lifetime
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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Sewage (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は雨水ポンプ台数制御装置
に関し、特にファジィ推論を用いて最適な制御を実現す
るものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the number of rainwater pumps, and more particularly to an apparatus for realizing optimal control using fuzzy inference.
【０００２】[0002]
【従来の技術】合流式の下水処理場や中継ポンプ場など
では、流入下水として汚水だけでなく、雨水も流入して
くるため、一般的に汚水ポンプと雨水ポンプが設置され
る。2. Description of the Related Art In a combined sewage treatment plant and a relay pumping station, not only sewage but also rainwater flows as inflow sewage. Therefore, a sewage pump and a stormwater pump are generally installed.
【０００３】汚水ポンプは汚水用として継続的で定常的
な揚排水機能が必要とされ、後段の処理プロセスや前段
の沈砂池プロセスの沈降効率などを考慮した排水が目的
となり可変速ポンプで計画される場合が多い。A sewage pump requires a continuous and steady pumping and draining function for sewage. A variable speed pump is planned for drainage in consideration of the sedimentation efficiency of a subsequent treatment process and a preceding sand basin process. In many cases.
【０００４】一方、雨水ポンプは雨水用として単発的で
非定常的な揚排水機能が必要とされ、短時間で迅速な排
水が目的となり固定速ポンプで計画される場合が多く、
また流入下水量に対応して複数台が設置されるためポン
プ運転台数制御が行われる。On the other hand, rainwater pumps require a one-time, unsteady pumping and draining function for rainwater, and are often planned with a fixed-speed pump for the purpose of quick drainage in a short time.
Further, since a plurality of pumps are installed corresponding to the amount of inflow sewage, the number of pumps operated is controlled.
【０００５】従来この雨水ポンプ運転台数制御は、一般
的には図４に示すように、ある特定した流入雨水量パタ
ーンを前提としてポンプ井水位に始動水位と停止水位を
固定的に設定し、ポンプ井水位がこの設定水位に達した
ときに、オン−オフ制御によるポンプ始動，停止指令を
出力して水位を調整していた。Conventionally, in this rainwater pump operation number control, as shown in FIG. 4, a start water level and a stop water level are fixedly set to a pump well water level on the basis of a specified inflow rainwater flow pattern. When the well level reaches this set level, a pump start / stop command is output by on-off control to adjust the level.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上述した従来
の方法では、ポンプ井水位に始動水位と停止水位を固定
的に設定し、それらの水位によるオン−オフ運転を行っ
ているため、次のような課題があった。However, in the above-mentioned conventional method, the starting water level and the stopping water level are fixedly set to the pump well water level, and the on / off operation is performed based on those water levels. There was such a problem.
【０００７】（１）流入下水量パターンを特定すること
は、実プロセスにおいては困難であるにもかかわらず、
前提とした流入下水量パターンに対応して始動水位と停
止を固定的に設定している。(1) Although it is difficult to specify an inflow / sewage flow pattern in an actual process,
The starting water level and the stop are fixedly set according to the assumed inflow / sewage flow pattern.
【０００８】（２）前提外の流入下水量パターンや過大
な流入下水量パターンなどに対して、ポンプ井水位の過
大な上昇やポンプの始動停止頻度を上昇させることにな
る。(2) Excessive rise in the pump well water level and the frequency of starting and stopping of the pump are increased with respect to an inflowing sewage amount pattern that is not assumed or an excessive inflowing sewage amount pattern.
【０００９】（３）結果的に最適な排水ができずポンプ
寿命の低下や電力消費量の上昇などを招くことになる。(3) As a result, optimal drainage cannot be performed, resulting in a reduction in pump life and an increase in power consumption.
【００１０】（４）現在のポンプ井水位のみに着目した
制御方式であり、予測的な要素がないため制御性として
流入下水量の変動に依存する割合が多くなるため、ロバ
ストな制御とすることが困難である。(4) This control method focuses only on the current pump well water level. Since there is no predictive element, the controllability is dependent on the fluctuation of the inflow and sewage flow rate. Is difficult.
【００１１】以上の点に鑑み、本発明は水位傾向により
予測的な要素も判断して、過大な流入下水量パターンに
対して、ポンプ水位の過大な上昇を防止し、且つポンプ
の始動−停止の頻度を低減する雨水ポンプの運転台数制
御装置を提供することを目的とするものである。In view of the above, the present invention also judges a predictive factor based on the water level tendency, prevents an excessive rise in the pump water level in response to an excessive inflow / drainage pattern, and starts and stops the pump. It is an object of the present invention to provide a control device for controlling the number of operating rainwater pumps, which reduces the frequency of the operation.
【００１２】[0012]
【課題を解決するための手段】本発明において、上記の
課題を解決するための手段は、ポンプ井に設けられた複
数の雨水ポンプの始動−停止水位を予めそれぞれ設定し
たポンプ井水位に応じて当該ポンプを始動又は停止させ
てポンプ井水位を調整する雨水ポンプの運転台数制御装
置において、あらかじめ設定した基準水位とポンプ井の
水位との水位偏差量を検出して偏差信号ＨＬを出力する
水位偏差量検出手段と、ポンプ井の水位をＴ1，Ｔ2，Ｔ
3時刻前の過去水位と現在水位との変化量△Ｌ1，△
Ｌ2，△Ｌ3を予測的な要素として演算する水位変化量演
算手段と、前記水位の偏差信号ＨＬと変化量△Ｌ1，△
Ｌ2，△Ｌ3を入力変数とし、ポンプ増減指令値△Ｎを出
力変数としてポンプ井の水位の調整量を推論し、ポンプ
運転台数の増減の確信値として出力するファジィ推論手
段と、該ファジィ推論手段の出力を離散値に変換し、ポ
ンプ増減台数指令信号をポンプ制御手段に出力するしき
い値変換手段と、このしきい値変換手段の指令信号を受
けて前記雨水ポンプの始動−停止を制御しポンプ井水位
を調整するポンプ台数制御手段とを備え最適な固定速の
雨水ポンプの運転台数制御を実現する。In the present invention, a means for solving the above-mentioned problems is to set a start-stop water level of a plurality of rainwater pumps provided in a pump well according to a preset pump well water level. In a rainwater pump operation number control device for adjusting the pump well water level by starting or stopping the pump, a water level deviation for detecting a water level deviation amount between a preset reference water level and a pump well water level and outputting a deviation signal HL. And the water level of the pump well is determined by T 1 , T 2 , T
Change amount between the past water level and the current water level three times before {L 1 , △}
Water level change amount calculating means for calculating L 2 , △ L 3 as a predictive element, and the water level deviation signal HL and the change amounts △ L 1 , △ L 3
Fuzzy inference means for inferring the adjustment amount of the water level of the pump well by using L 2 and ΔL 3 as input variables, and using the pump increase / decrease command value ΔN as an output variable, and outputting as a certainty value of increase / decrease of the number of pumps operated; Threshold conversion means for converting the output of the inference means into discrete values, and outputting a pump increase / decrease number command signal to the pump control means, and receiving the command signal from the threshold conversion means, starting and stopping the rainwater pump. And control means for controlling the pump well water level to realize optimal control of the number of operating fixed-speed rainwater pumps.
【００１３】[0013]
【作用】雨水ポンプ井の水位が変化すると、ファジィ推
論手段には設定基準水位との偏差水位は比例した偏差信
号ＨＬと、Ｔ1，Ｔ2，Ｔ3秒前の過去水位と現在水位の
３つの変化量信号△Ｌ1，△Ｌ2，△Ｌ3が入力されてい
るので、ファジィ推論手段で、これらの偏差信号ＨＬ、
変化量信号△Ｌ1，△Ｌ2，△Ｌ3を現象項目とし、ポン
プ増減台数指令を原因項目とするファジィ推論が行わ
れ、その推論結果に基づいてしきい値変換手段およびポ
ンプ台数制御手段を介して複数台の雨水ポンプの始動−
停止制御が行われ、ポンプ井の水位が調整される。When the water level of the rainwater pump well changes, the fuzzy inference means provides a deviation signal HL indicating that the deviation from the set reference level is proportional to the deviation level HL, and the past and present levels 3 seconds before T 1 , T 2 , and T 3 seconds. Since the two change amount signals △ L 1 , △ L 2 , △ L 3 are input, the deviation signals HL, HL,
Fuzzy inference is performed using the change amount signals △ L 1 , △ L 2 , △ L 3 as a phenomenon item and a pump increase / decrease number command as a cause item, and based on the inference result, a threshold value conversion means and a pump number control means Of multiple rainwater pumps via
Stop control is performed, and the water level in the pump well is adjusted.
【００１４】従って、降雨量が急激に増加した場合で
も、それを速やかに予測し、短時間で対応して迅速な排
水を可能とする。Therefore, even when the amount of rainfall increases rapidly, it is predicted quickly, and the drainage can be quickly performed in a short time.
【００１５】[0015]
【実施例】以下、本発明を図面に示す一実施例に基づい
て説明する。図１は本発明の一実施例の下水処理場にお
ける雨水ポンプ運転台数制御の説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 is an explanatory diagram of controlling the number of operating rainwater pumps in a sewage treatment plant according to one embodiment of the present invention.
【００１６】図１において、１は雨水処理場で、該雨水
処理場１は、雨水の流入する流入渠２と、雨水中の粗大
ごみを取り除き、土砂などを沈殿除去する沈砂池３と、
これら粗大ごみや土砂を除去した雨水を留めるポンプ井
４と、このポンプ井３の雨水を水処理プロセス６の最初
沈殿池に送水する複数台の雨水ポンプ５（Ｐ1〜Ｐn）を
備えている。７はポンプ井４の水位を計測する水位計を
示し、水位に比例した水位信号を出力する。In FIG. 1, reference numeral 1 denotes a rainwater treatment plant. The rainwater treatment plant 1 includes an inflow culvert 2 into which rainwater flows, a sedimentation basin 3 for removing bulky trash in the rainwater, and removing sediment and the like.
Comprises a pump well 4 to fasten these oversized garbage and sediment rainwater removal of, a plurality of rainwater pump 5 for water rainwater of the pump well 3 in primary sedimentation water treatment process 6 (P 1 ~P n) I have. Reference numeral 7 denotes a water level meter that measures the water level of the pump well 4, and outputs a water level signal proportional to the water level.
【００１７】１０は雨水ポンプの運転台数を制御するポ
ンプ台数制御部で、ファジィ推論手段１１を備えてい
る。１２はポンプ井４の水位偏差量検出手段で、基準水
位を設定する基準水位設定器１３の信号と水位計７の出
力信号とを比較し、その偏差を偏差信号ＨＬとしてファ
ジィ推論手段１１に入力する。Reference numeral 10 denotes a pump number control unit for controlling the number of operating rainwater pumps, and includes a fuzzy inference means 11. Numeral 12 denotes a water level deviation detecting means for the pump well 4, which compares the signal of the reference water level setting device 13 for setting the reference water level with the output signal of the water level gauge 7, and inputs the deviation as a deviation signal HL to the fuzzy inference means 11. I do.
【００１８】１４は水位変化量演算手段で、時刻Ｔ1，
Ｔ2，Ｔ3（秒）前の過去水位と現在水位の３つの変化量
を予測的な要素とし、水位傾向を把握する。即ち、図２
に示すように、現在よりＴ1秒前のポンプ井水位変化
量、Ｔ2秒前の水位変化量、Ｔ3秒前の水位変化量を演算
して各変化量信号△Ｌ1，△Ｌ2，△Ｌ3をファジィ推論
手段１１に入力する。Numeral 14 denotes a water level change amount calculating means, which is used at time T 1 ,
The water level tendency is grasped using the three amounts of change of the past water level and the current water level before T 2 and T 3 (sec) as predictive elements. That is, FIG.
As shown in the figure, the pump well water level change amount T 1 seconds before the present, the water level change amount T 2 seconds before, and the water level change amount T 3 seconds before are calculated, and the change amount signals △ L 1 , △ L 2 , △ L 3 are input to the fuzzy inference means 11.
【００１９】１５はしきい値変換手段で、ファジィ推論
手段１１の出力信号△Ｎはポンプ増減の確信値（連続
値）となるため、そのままポンプ増減台数指令（離散
値）にできないため、このしきい値変換手段により離散
値に変換し、ポンプ増減台数指令信号としてポンプ台数
制御手段１６に出力し、該ポンプ台数制御手段１６で複
数の雨水ポンプ５のうち該当するポンプの運転又は停止
の制御を行う。Reference numeral 15 denotes a threshold conversion means. Since the output signal △ N of the fuzzy inference means 11 becomes a certain value (continuous value) of the pump increase / decrease, it cannot be directly used as the pump increase / decrease number command (discrete value). It is converted into a discrete value by the threshold value conversion means, and is output to the pump number control means 16 as a pump increase / decrease number command signal. The pump number control means 16 controls the operation or stop of the corresponding pump among the plurality of rainwater pumps 5. Do.
【００２０】ファジィ推論手段１１では、入力変数（現
象項目）であるＴ1秒前変化量信号△Ｌ1，Ｔ2秒前変化
量信号△Ｌ2，Ｔ3秒前変化量信号△Ｌ3、ポンプ井の偏
差量信号ＨＬおよび出力変数（原因項目）であるポンプ
増減指令値△Ｎを図３のＮＢ，ＮＳ，ＺＯ，ＰＳ，ＰＢ
の５段階のメンバーシップ関数として定め、推論のため
のルールマトリックスを表１のように規定する。In the fuzzy inference means 11, the input variable (phenomenon item) of the change signal before T 1 seconds 秒 L 1 , the change signal before T 2 seconds 秒 L 2 , the change signal before T 3 seconds △ L 3 , The pump increase / decrease command value △ N, which is the pump well deviation amount signal HL and the output variable (cause item), is used as the NB, NS, ZO, PS, PB in FIG.
And a rule matrix for inference is defined as in Table 1.
【００２１】[0021]
【表１】 [Table 1]
【００２２】このルールマトリックスによるＩＦ〜ＴＨ
ＥＮルールに基づいてポンプ増減値を推論し、ポンプ台
数制御手段１６へ送出する。ポンプ台数制御手段１６で
は、この指令を受けて複数台の雨水ポンプの始動−停止
制御を行い、ポンプ井の水位を調整する。IF to TH by this rule matrix
The pump increase / decrease value is inferred based on the EN rule and sent to the pump number control means 16. In response to this command, the pump number control means 16 performs start-stop control of a plurality of rainwater pumps and adjusts the water level of the pump wells.
【００２３】[0023]
【発明の効果】本発明は以上の説明のように、固定的な
始動水位と停止水位を設定せず、基準となるポンプ井水
位を設定し、Ｔ1，Ｔ2，Ｔ3秒前の過去水位と現在水位
の３つの変化量を予測的な要素として水位傾向を把握
し、基準水位との水位差と３つの変化量を現象項目と
し、ポンプ増減台数指令を原因項目としてファジィ推論
を行って、ポンプの運転台数を制御するようにしたの
で、 （１）流入下水量パターンを特定する必要がなく、実プ
ロセスへの適用が容易な実用性があり、また広範囲の流
入下水量パターンに対応できる柔軟性がある。As described above, the present invention does not set the fixed start and stop water levels, but sets the reference pump well water level, and sets the reference pump well water level before T 1 , T 2 , and T 3 seconds before. The water level trend is grasped using the three changes of the water level and the current water level as predictive factors, and the difference between the water level and the reference water level and the three changes are used as phenomena, and fuzzy inference is made using the pump increase / decrease number command as the cause. Since the number of pumps operated is controlled, (1) there is no need to specify an inflow sewage amount pattern, there is practicality that can be easily applied to an actual process, and a wide range of inflow sewage amount patterns can be handled. There is flexibility.
【００２４】（２）水位傾向により予測的な要素も判断
しているため、過大な流入下水量パターンに対して、ポ
ンプ井水位の過大な上昇を防止すると共に、ポンプの始
動停止頻度を低減できる。(2) Since a predictive factor is also determined based on the water level tendency, an excessive rise in the pump well water level can be prevented and the frequency of starting and stopping the pump can be reduced with respect to an excessive inflow / drainage pattern. .
【００２５】（３）広範囲の流入下水量パターンに対し
てポンプ寿命の低下や電力消費量の上昇など防止でき、
最適な排水機能を実現できる。(3) It is possible to prevent a reduction in pump life and an increase in power consumption for a wide range of inflow / sewage flow patterns,
Optimum drainage function can be realized.
【００２６】（４）予測的な要素により、制御性として
流入下水量の変動に依存する割合が少することができる
ことになり、よりロバストな制御となる。(4) Due to the predictive factor, the controllability can be reduced by the ratio depending on the fluctuation of the amount of inflow and sewage, and the control becomes more robust.
【００２７】（５）ファジィ推論を使用しており柔軟な
アルゴリズムの構成が可能であり、そのルールの変更や
修正なども容易にできる。(5) Fuzzy inference is used, and a flexible algorithm configuration can be made, and its rules can be easily changed or modified.
【００２８】等の優れた効果を奏するものである。And the like.
【図１】本発明の一実施例の構成図。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】ポンプ井水位変化量演算の説明図。FIG. 2 is an explanatory diagram of a pump well water level change amount calculation.
【図３】メンバーシップ関数。FIG. 3 shows a membership function.
【図４】従来の雨水ポンプ運転台数制御説明図。FIG. 4 is an explanatory diagram of a conventional rainwater pump operation number control.
１…雨水処理場 ２…流入渠 ３…沈砂池 ４…ポンプ井 ５…雨水ポンプ ６…水処理プロセス ７…水位計 １０…ポンプ台数制御部 １１…ファジィ推論手段 １２…水位偏差量検出手段 １３…基準水位設定器 １４…水位変化量演算手段 １５…しきい値変換手段 １６…ポンプ台数制御手段 DESCRIPTION OF SYMBOLS 1 ... Rainwater treatment plant 2 ... Inflow culvert 3 ... Sand basin 4 ... Pump well 5 ... Rainwater pump 6 ... Water treatment process 7 ... Water level meter 10 ... Pump number control part 11 ... Fuzzy inference means 12 ... Water level deviation amount detection means 13 ... Reference water level setting unit 14: Water level change amount calculation means 15 ... Threshold value conversion means 16 ... Pump number control means
Claims (1)
の始動−停止水位を予めそれぞれ設定したポンプ井水位
に応じて当該ポンプを始動又は停止させてポンプ井水位
を調整する雨水ポンプの運転台数制御装置において、あ
らかじめ設定した基準水位とポンプ井の水位との水位偏
差量を検出して偏差信号ＨＬを出力する水位偏差量検出
手段と、 ポンプ井の水位をＴ1，Ｔ2，Ｔ3時刻前の過去水位と現
在水位との変化量△Ｌ1，△Ｌ2，△Ｌ3を予測的な要素
として演算する水位変化量演算手段と、 前記水位の偏差信号ＨＬと変化量△Ｌ1，△Ｌ2，△Ｌ3
を入力変数とし、ポンプ増減指令値△Ｎを出力変数とし
てポンプ井の水位の調整量を推論し、ポンプ運転台数の
増減の確信値として出力するファジィ推論手段と、 該ファジィ推論手段の出力を離散値に変換しポンプ増減
台数指令信号をポンプ制御手段に出力するしきい値変換
手段と、 このしきい値変換手段の指令信号を受けて前記雨水ポン
プの始動−停止を制御しポンプ井水位を調整するポンプ
台数制御手段とを備えたことを特徴とする雨水ポンプの
運転台数制御装置。1. The number of operating rainwater pumps that adjusts the pump well water level by starting or stopping the plurality of rainwater pumps provided in the pump well according to the pump well water level in which start-stop water levels are set in advance. in the control device, and the water level deviation amount detecting means for outputting a deviation signal HL detects the water level deviation of the water level of the reference water level and the pump well set in advance, the water level of the pump well T 1, T 2, T 3 time Water level change amount calculating means for calculating the change amounts △ L 1 , △ L 2 , △ L 3 between the previous past water level and the current water level as predictive elements; and the water level deviation signal HL and the change amount △ L 1 , △ L 2 , △ L 3
Fuzzy inference means for inferring the adjustment amount of the water level of the pump well using the pump increase / decrease command value △ N as an output variable and outputting as a certainty value of the increase / decrease of the number of pumps operated, and a discrete output of the fuzzy inference means Threshold conversion means for converting the value into a value and outputting a pump increase / decrease number command signal to the pump control means; receiving the command signal from the threshold conversion means, controlling start-stop of the rainwater pump to adjust the pump well water level. And a control unit for controlling the number of operating rainwater pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18382894A JP3221243B2 (en) | 1994-08-05 | 1994-08-05 | Rainwater pump operating number control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18382894A JP3221243B2 (en) | 1994-08-05 | 1994-08-05 | Rainwater pump operating number control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0849287A JPH0849287A (en) | 1996-02-20 |
| JP3221243B2 true JP3221243B2 (en) | 2001-10-22 |
Family
ID=16142560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18382894A Expired - Lifetime JP3221243B2 (en) | 1994-08-05 | 1994-08-05 | Rainwater pump operating number control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3221243B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060675B (en) * | 2013-03-21 | 2015-12-09 | 上海市城市排水有限公司 | The equal permanent water level exhaust system of municipal wastewater collecting well and discharge method thereof |
| CN110334468B (en) * | 2019-07-16 | 2021-10-22 | 哈尔滨工业大学 | Method for quantifying rainwater influx and overflow of urban drainage pipe network |
-
1994
- 1994-08-05 JP JP18382894A patent/JP3221243B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0849287A (en) | 1996-02-20 |
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