7/1/2016 1:56 PM | |
Posts: 16 Rating: (0) |
TWO GENERATORS IN PARALLEL i have two generator g1= 1000kva and g2= 1000 kva same specifics i need to connected them on parallel so first the g1 on and when the load is high 70%the g2=on and when the load 25% g2=off i write program in s7 200 with in attached file cpu224 - em235 - td200 - 0-20ma transducer with 1500/5 A CT is this program is right or not pleas help me Attachmentparallel generator.pdf (385 Downloads) |
Last edited by: erwwq at: 7/2/2016 2:16:32 PMLast edited by: erwwq at: 7/3/2016 4:33:41 PM |
|
7/2/2016 1:41 PM | |
Posts: 16 Rating: (0) |
Attachmentnew.pdf (338 Downloads) |
Last edited by: erwwq at: 7/2/2016 1:47:17 PMLast edited by: erwwq at: 7/2/2016 1:48:32 PMLast edited by: erwwq at: 7/2/2016 1:52:05 PMLast edited by: erwwq at: 7/2/2016 1:54:36 PMLast edited by: erwwq at: 7/2/2016 2:15:31 PMLast edited by: erwwq at: 7/3/2016 4:34:38 PM |
|
7/2/2016 6:34 PM | |
Posts: 5225 Rating: (1192)
|
Dear Electrical Engineer Asem, * Do the generators have internal electronic phase & load regulation? * Single phase or three phase output? * Are the generators made to be able to connect in cascade? Are they able to synchronise power phase to each other before the switch over occurs? * What type signalling / interlock are available to connect generators to each other and generators to PLC? Does signalling include communication (RS232 / RS485 / Ethernet...)? * Is there any alarm relay feedback to the PLC - can a generator (for example) let the PLC know if temperature too high or fuel level is low? * ....... * The TD200 consumes V-memory. Does this perhaps overlap memory already used in the program? Which V-memory range is it using? * Which S7-200? CPU224.. version? power input? type input DC/AC? type output DC/AC? * Confirmed and tested analog input for scaling? What is "zero", what is "100%"? Are these documented formally for future reference? * How is the analog readings scaled is "zero" if AIW0 > 0 or AIW2 > 0? * Electrical circuit between generators and PLC.. which Inputs / Outputs are used for which purpose? * Does the PLC need to track the running time of each generator? ..for maintenance and to swap out the roles of primary and secondary to ensure equal loading over time? * What messages needs to be displayed on the TD200? Alarms? Settings? Running times? Current loading? Anything else? * From where is the S7-200 powered? From a generator / battery / UPS? * Are there any special tasks the PLC should do at power on? * How is the PLC told to go to automatic / manual modes? What is the difference in these modes? * Is filter timing needed on the power input readings? ..for how long should the primary generator be at a high level before the secondary generator is switched on? * ....... If you still have time left on your deadline, I recommend you ask targeted questions. Be specific to what you want to know to fill up gaps. But you need to know which gaps you need filling.
|
This contribution was helpful to2 thankful Users |
7/3/2016 7:51 AM | |
Posts: 16 Rating: (0) |
|
Last edited by: erwwq at: 7/3/2016 8:02:25 AM |
|