Ðóññêàÿ âåðñèÿ
Óêðà¿íñüêà âåðñ³ÿ

The dynamic model of real-time of the Anastasievskaja GLKS

Introduction

Anastasievskaya GLKS (AGLKS) is the technological process designed for two-stage gas compression of gas fields. For this purpose GLKS is provided with six centrifugal compressors: three compressor for low and high pressure part, thus providing redundancy and allowing the parallel operation.

To test the control algorithms of GLKS, especially anti surging algorithms the creation of mathematical model of GLKS was required. The model must run on the single board computer with the PCI and communicate with the controller of the technological process control. For development of the model it was used library of technological devices of OpenSCADA. Subsequently, the TP model of the compressor station has grown into an autonomous system which is used in the OpenSCADA project as the demonstration of features and capabilities.

1 Technological process

Before creating the GLKS model, it was created the principle circuit of the model of technological process, based on the principle circuit of the real process. The resulting scheme is shown in Figure 1.

2 Modeling

To construct the model of technological process on the basis of the available models of tech. devices it was directly used the source principle scheme and block calculator (BlockCalc) of the OpenSCADA system. The technological devices added to the block scheme in accordance to the principle scheme. Several blocks were added as the accessory ones and for the nodes of the flows. The numbers of the nodes' blocks are indicated on the principle scheme near the flows nodes.

The model is implemented as an eight-block schemes of the block calculator. Structure and properties of block schemes are shown in Table 1.

Table 1. Model block scheme

From the characteristics of block schemes can be seen that the capacity of the model as a whole to the CPU Athlon 64 3000+ (2000MHz) is 19.5%.

Table 2. lists the models being used in accordance with the principle scheme.

Table 2. Using of the technological devices model

Through the using of the library of the models of tech. devices and concepts for building the dynamic models it has been obtained the dynamic model, from which you can get the parameters at any point of the principle scheme as for the study and for testing of the control algorithms.

In the model of the control system of the mainstation part there are three PID: PC_KRD1, PC_KRD2 and PC_KRD3 to regulate the pressure at the input of the CS, between the compressors of low and high pressure, as well as at the output of the CS.

To obtain the information on the technological process the parameters of TP (Table 3) were created, which represent data from individual nodes of the model.

Table 3. Parameters of the technological process

3 Èíòåðôåéñ ïîëüçîâàòåëÿ

Ïîëüçîâàòåëüñêèé èíòåðôåéñ ìîäåëè ïðåäñòàâëåí ñåìüþ îáúåêòàìè ñèãíàëèçàöèé (ðèñ.2). Øåñòü èç íèõ ñîäåðæàò êàäðû êîìïðåññîðîâ ÊÌ101, ÊÌ201, ÊÌ301, ÊÌ102, ÊÌ202 è ÊÌ302. Ñåäüìîé æå ÿâëÿåòñÿ îáùèì äëÿ âñåé êîìïðåññîðíîé ñòàíöèè è ñîäåðæèò îáùåñòàíöèîííûå êàäðû. Îáùåñòàíöèîííàÿ ãðóïïà ñèãíàëèçàöèè ñîäåðæèò äâå ìíåìîñõåìû, äâå ãðóïïû ãðàôèêîâ, ãðóïïó êîíòóðîâ, ãðóïïó îáçîðíûõ êàäðîâ è ïÿòü äîêóìåíòîâ.

Ðèñ.2. Îáùèé âèä îêíà èíòåðôåéñà ïîëüçîâàòåëÿ.

Ìíåìîñõåìû îáúåêòà ñèãíàëèçàöèè "Îáùåñòàíöèîíêà" ïðåäñòàâëåíû íà ðèñ.3 è ðèñ.4.

Ðèñ.3. Ãëàâíàÿ ìíåìîñõåìà ÊÑ

Ðèñ.4. Òåñòîâàÿ ìíåìîñõåìà

Ãðóïïû ãðàôèêîâ "Ìàññîâûå ïîòîêè" è "Òåìïåðàòóðû" ïðåäñòàâëåíû íà ðèñ.5 è ðèñ.6 ñîîòâåòñòâåííî.

Ðèñ.5. Ãðóïïà ãðàôèêîâ "Ìàññîâûå ïîòîêè".

Ðèñ.6. Ãðóïïà ãðàôèêîâ "Òåìïåðàòóðû".

Ãðóïïà êîíòóðîâ "Òåñòîâàÿ ãðóïïà" (ðèñ.7) ñîäåðæèò êîíòóðà âñåõ ðåãóëÿòîðîâ è ðÿä âàæíûõ ïàðàìåòðîâ.

Ðèñ.7. Ãðóïïà êîíòóðîâ "Òåñòîâàÿ ãðóïïà".

Ãðóïïà îáçîðíûõ êàäðîâ "Îáçîð 1" (ðèñ.8) ñîäåðæèò êàäðû îñíîâíûõ ïàðàìåòðîâ.

Ðèñ.8. Ãðóïïà îáçîðíûõ êàäðîâ "Îáçîð 1".

Äîêóìåíòû "Òàáëèöà íàêîïëåííûõ ìãíîâåííûõ çíà÷åíèé", "Æóðíàë âìåøàòåëüñòâ", "Òàáëèöà ñðåäíå÷àñîâûõ çíà÷åíèé", "Òàáëèöà ñðåäíåñóòî÷íûõ çíà÷åíèé" è "Ñóòî÷íûé îò÷¸ò" ïðåäñòàâëåíû íà ðèñ.9, ðèñ.10, ðèñ.11, ðèñ.12 è ðèñ.13 ñîîòâåòñòâåííî.

Ðèñ.9. Äîêóìåíò "Òàáëèöà íàêîïëåííûõ ìãíîâåííûõ çíà÷åíèé".

Ðèñ.10. Äîêóìåíò "Æóðíàë âìåøàòåëüñòâ".

Ðèñ.11. Äîêóìåíò "Òàáëèöà ñðåäíå÷àñîâûõ çíà÷åíèé".

Ðèñ.12. Äîêóìåíò "Òàáëèöà ñðåäíåñóòî÷íûõ çíà÷åíèé".

Ðèñ.13. Äîêóìåíò "Ñóòî÷íûé îò÷¸ò".

Îáúåêòû ñèãíàëèçàöèè êîìïðåññîðîâ íèçêîãî äàâëåíèÿ ñîäåðæàò ìíåìîñõåìó ðèñ.14 è ãðóïïó ãðàôèêîâ ðèñ.15.

Ðèñ.14. Ìíåìîñõåìà êîìïðåññîðà íèçêîãî äàâëåíèÿ.

Ðèñ.15. Ãðóïïà ãðàôèêîâ êîìïðåññîðà íèçêîãî äàâëåíèÿ.

Îáúåêòû ñèãíàëèçàöèè êîìïðåññîðîâ âûñîêîãî äàâëåíèÿ ñîäåðæàò ìíåìîñõåìó ðèñ.16 è ãðóïïó ãðàôèêîâ ðèñ.17.

Ðèñ.16. Ìíåìîñõåìà êîìïðåññîðà âûñîêîãî äàâëåíèÿ.

Ðèñ.17. Ãðóïïà ãðàôèêîâ êîìïðåññîðà âûñîêîãî äàâëåíèÿ.

Äëÿ îòîáðàæåíèÿ äèíàìèêè âñåé êîìïðåññîðíîé ñòàíöèè ïðåäóñìîòðåíà ãðóïïà ñâîäíûõ ãðàôèêîâ (ðèñ.18)

Ðèñ.18. Ãðóïïà ñâîäíûõ ãðàôèêîâ "Ñòðàíèöà 1".

4 Ðåçóëüòàòû

Ðåçóëüòàòîì ðàçðàáîòêè ñòàëà ïîëíîöåííàÿ äèíàìè÷åñêàÿ ìîäåëü òåõíîëîãè÷åñêîãî ïðîöåññà êîìïðåññîðíîé ñòàíöèè. Äàííàÿ ìîäåëü äîñòóïíà íà òð¸õ ÿçûêàõ è âêëþ÷åíà â äèñòðèáóòèâû ñèñòåìû OpenSCADA â ðîëè äåìîíñòðàöèè ôóíêöèé è âîçìîæíîñòåé.

Ìîäåëü ïðåäóñìàòðèâàåò âîçìîæíîñòü óïðàâëåíèÿ ÒÏ îò ëèöà îïåðàòîðà, âêëþ÷àÿ îïåðàöèè:

• óïðàâëåíèå ðåãóëÿòîðàìè äàâëåíèé:
  • èçìåíåíèå ðåæèìà ðåãóëÿòîðà: "Àâòîìàò" èëè "Ðó÷íîé";
  • óñòàíîâêà íóæíîãî çíà÷åíèÿ çàäàíèÿ èëè ðó÷íîãî âûõîäà èñïîëíèòåëüíîãî ìåõàíèçìà;
  • íàñòðîéêà ïàðàìåòðîâ ÏÈÄ-ðåãóëÿòîðà.
• óïðàâëåíèå çàäâèæêàìè è øàðîâûìè êðàíàìè ïîñðåäñòâîì ïàíåëè óïðàâëåíèÿ è êîíòåêñòíîãî ìåíþ ïóò¸ì çàêðûòèÿ èëè îòêðûòèÿ;
• ðó÷íîé ââîä çíà÷åíèé ïàðàìåòðîâ îáîðîòîâ (ST8612) è ïîëîæåíèé àíòèïîìïàæíûõ êëàïàíîâ (KPPx0x).

 ïðèêëàäíîì ñìûñëå ìîäåëü ñ óñïåõîì ïðèìåíÿëàñü äëÿ îòëàäêè àëãîðèòìîâ ïðîòèâîïîìïàæíîé çàùèòû êîìïðåññîðîâ Àíàñòàñèåâñêîé ÃËÊÑ.

Ññûëêè