• solar panel water pump inverter off grid
  • solar panel water pump inverter off grid
  • solar panel water pump inverter off grid

solar panel water pump inverter off grid

solar panel water pump inverter off-grid

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Solar pumping system introduction

Solar pumping systems can be applied to all forms of daily use, water pumping for drinking water supply for remote villages and farms without connection to the water grid, for agricultural use such as livestock watering, agricultural irrigation, forestry irrigation, pond management, desert control, and industrial use such as waste water treatment etc.

In recent years, with the promotion of the utilization of renewable energy resources, solar pumping systems are more and more used in municipal engineering, city center squares, parks, tourist sites, resorts and hotels, and fountain systems in residential areas.

The system is composed of a PV generator ( solar panels ), a pump and a solar pump inverter. Based on the design philosophy that it is more efficient to store water rather than electricity, there is no energy storing device such as storage battery in the system. The system is prepared to be combined with a elevated water storage, e.g. water tower or an uphill tank installation.

The PV generator, an aggregation of PV modules connected in series and in parallel, absorbs solar irradiation and converts it into electrical energy, providing power for the whole system. The pump inverter controls and adjusts the system operation and converts the DC produced by the PV module into AC to drive the pump, and adjusts the output frequency in real-time according to the variation of sunlight intensity to realize the maximum power point tracking (MPPT). The pump, driven by 3-phase AC motor, can draw water from deep wells, rivers and lakes and pour it into storage tanks or reservoirs, or be connected directly to the irrigation system, fountain system, etc. According to the actual system demand and installation condition, different types of pumps such as centrifugal pump, axial flow pump, mixed flow pump or deep well pump can be used.





  Solar pump system constitution.

.Solar pump system include solar panels arrays, solar pump inverter and AC 1/3 phase pumps, and other accessories, such as combiner box, DC circuit breaker, AC/DC manual switchover, AC circuit breaker....


System wiring diagram including solar panels, solar pump inverter and pumps.

Solar pump system features

²   High flow system for faster tank fill and significant water output with MPPT function.

²  ·Proven motor and pump technology for long-term reliability

²  ·Available free of cost at your doorstep, one times investment for more than 20 years free using

²  ·Clean and pollution free energy, eco-friendly.

²  ·Ideal for remote areas, where electricity is not available or availability is capital intensive.

²  ·Suitable for day time irrigation, continuous supply for 8-12 hours in a day.

²  ·Soft start feature prevents water hammer and increases system life easy to operate.

²  ·Simple installation and maintenance free.

 

 Solar pump inverter operation theory

The solar pump inverter uses the maximum power point tracking (MPPT) control program to improve the efficiency of solar energy systems. The output of the photovoltaic (PV) cell is proportional to its area and intensity, while the output voltage is limited by P-N junction from 0.6 to 0.7 V. Therefore when the output voltage is constant, output power is proportional to intensity and surface area. The current and voltage at which the PV cell generates maximum power is known as the maximum power point.

The MPPT controller follows different strategies to derive the maximum power from the PV array. The internal MPPT algorithm is used to derive maximum power from the PV cell at any instant. This is achieved by modifying the operating voltage or current in the PV cell until the maximum power is obtained.

When the output voltage is zero, the PV cells create short circuit current. If the PV cells are not connected to any load, the output voltage is equal to the open circuit voltage. The maximum power point is obtained at the knee of the I-V curve. See the I-V characteristics shown below.


The I-V curve is not constant since intensity and temperature changes during day time. Under constant temperature, current changes linearly with intensity and voltage changes logarithmically with intensity. Since the voltage variation is small with respect to intensity changes, maximum power varies proportionally with intensity


 

Chapter2. PV serial solar pump inverter selection

2.1 PV series solar pump inverter nameplate.


2T models:It uses for 220VAC pumps, 150VDC to 450VDC input, recommend 310Vmp.

(Lowest 80VDC input is option)

4T models:It uses for 380VAC pumps, 350VDC to 800VDC input, recommend 540Vmp.

( 250VDC input is option)

5T models: it uses for 480VAC pumps, 350VDC to 900VDC, recommend 676vmp.

2.2. PV350/PV800 solar Pump inverter models list:

Model

Input   voltage

Output for   pumps

Power

PV350-2T

 

150 to   450VDC, or 220VAC

3 PH   0-220VAC

0.4kw/0.75kw/1.5kw/2.2kw

PV800-2T

150 to   450VDC, or 220VAC

3 PH   0-220VAC

0.75kw to   75kw

PSD350-2T

150 to   450VDC, or 220VAC

3 PH   0-220VAC

0.4kw/0.75kw/1.5kw/2.2kw

PSD800-2T

150 to   450VDC, or 220VAC

3 PH   0-220VAC

0.75kw-18.0kw

PV350-4T

250 to   800VDC 380VAC/415VAC

3 PH   0-380/415VAC

0.75kw—3.7kw

PV800-4T

250 to   800VDC 380VAC/415VAC

3 PH   0-380/415VAC

0.75kw—500kw

 

PSD350-4T

250 to   800VDC 380VAC/415VAC

3 PH   0-380/415VAC

0.75kw—3.7kw

PSD800-4T

250 to   800VDC 380VAC/415VAC

3 PH   0-380/415VAC

0.75kw—30kw

 

 

2.3. PV350/800 serial   solar pump inverter model list











SN

Models

Rate   current

 

Output   voltage ( 3PH VAC)

Applicable   for pumps

Packing   size

MPPT   voltage (VDC)

GW

Kgs




2T series : 150 to 450 VDC or 220VAC input, Vmp 310VDC, 372VDC











1

PV350-2T0.75GB

4A

0   – 220V

0.75KW

215*170*190

260   to 355

1.5




2

PV350-2T1.5GB

7A

0 -220V

1.5KW

215*170*190

260   to 355

1.5




3

PV350-2T2.2GB

10A

0 -220V

2.2kw

215*170*190

260   to 355

1.5




4

PV800-2T3.7G

16A

0 -220V

3.7kw

280*180*215

260   to 355

1.5




5

PV800-2TXXGB

**

0-220V

<75kw

No-standard

260   to 355

**




4T series, 250/ 350 to 800 VDC or 380VAC, Vmp540VDC, Voc 648VDC











4

PV350-4T0.75GB

2.5A

0-440V

0.75KW

215*170*190

486   to 650

1.5




5

PV350-4T1.5GB

3.7A

0-440V

1.5KW

215*170*190

486   to 650

1.5




6

PV350-4T2.2GB

5A

0-440V

2.2KW

215*170*190

486   to 650

1.5




7

PV350-4T3.7GB

10A

0-440V

3.7KW

215*170*190

486   to 650

1.5




8

PV800-4T1.5GB

3.7A

0-440V

1.5KW

280*180*215

486   to 650

3




9

PV800-4T2.2GB

5A

0-440V

2.2KW

280*180*215

486   to 650

3




10

PV800-4T3.7GB

10A

0-440V

4.0KW

280*180*215

486   to 650

3




11

PV800-4T5.5GB

13A

0-440V

5.5KW

320*215*250

486   to 650

4.3




12

PV800-4T7.5GB

17A

0-440V

7.5KW

320*215*250

486   to 650

4.5




13

PV800-4T11GB

25A

0-440V

11KW

390*275*285

486   to 650

6.5




14

PV800-4T15GB

32A

0-440V

15KW

390*275*285

486   to 650

6.6




15

PV800-4T18.5GB

38A

0-440V

18.5KW

445*205*315

486   to 650

12




16

PV800-4T22GB

45A

0-440V

22KW

445*205*315

486   to 650

12




17

PV800-4T30G

60A

0-440V

30KW

545*395*370

486   to 650

16




18

PV800-4T37G

75A

0-440V

37KW

660*420*415

486   to 650

16




19

PV800-4T45G

90A

0-440V

45KW

660*420*415

486   to 650

27




20

PV800-4T55G

110A

0-440V

55KW

700*480*410

486   to 650

35




21

PV800-4T75G

150A

0-440V

75KW

700*480*410

486   to 650

35




22

PV800-4T93G

170A

0-440V

93KW

700*480*490

486   to 650

53




23

PV800-4T110G

210A

0-440V

110KW

700*480*490

486   to 650

56




25

PV800-4T132G

260A

0-440V

132KW

780*540*510

486   to 650

71




25

PV800-4T160G

300A

0-440V

160KW

780*540*510

486   to 650

72




26

PV800-4T185G

340A

0-440V

185KW

1130*580*570

486   to 650

149




27

PV800-4T200G

380A

0-440V

200KW

1130*580*570

486   to 650

180




PSD350 IP54, 2T series, 150 to 450 VDC or 220VAC input, Vmp   310VDC, 372VDC











1

PSD350-2T0.75GB

4A

0-220V

0.75KW

265*180*210

260   to 355

2




2

PSD350-2T1.5GB

7A

0-220V

1.5KW

265*180*210

260   to 355

2




3

PSD350-2T2.2GB

10A

0-220V

2.2kw

265*180*210

260   to 375

2




4

PSD800-2T3.7GB

16A

0-220V

3.7kw

335*225*245

260   to 355

3




PSD800 IP54, 4T series, 250 to 800 VDC or 380VAC, Vmp540VDC, Voc   648VDC











4

PSD350-4T0.75GB

2.5A

0-440V

0.75KW

265*180*210

486   to 650

2




5

PSD350-4T1.5GB

3.7A

0-440V

1.5KW

265*180*210

486   to 650

2




6

PSD350-4T2.2GB

5A

0-440V

2.2KW

265*180*210

486   to 650

2




7

PSD350-4T3.7GB

10A

0-440V

3.7KW

265*180*210

486   to 650

2




8

PSD800-4T5.5GB

13A

0-440V

5.5KW

400*270*290

486   to 650

4.3




9

PSD800-4T7.5GB

16A

0-440V

7.5KW

400*270*290

486   to 650

4.5




10

PSD800-4T11GB

25A

0-440V

11KW

440*330*310

486   to 650

6.5




11

PSD800-4T15GB

32A

0-440V

15KW

440*330*310

486   to 650

7




12

PSD800-4T18.5G

38A

0-440V

18.5KW

540*400*365

486   to 650

10




13

PSD800-4T22GB

45A

0-440V

22KW

540*400*365

486   to 650

11




14

PSD800-4T30G

60A

0-440V

30KW

540*400*365

486   to 650

14















 

Chapter3. PV series solar pump inverter specification.

** Specification of Solar pump inverter specification when   parameters H9.00 set to for 1.


Recommended MPPT voltage range

Vmp 260 to 355VDC for 2T ( For driving 220VAC pumps )

Vmp 486 to 650 VDC for 4T (For driving 380VAC pumps)

Recommended input Voc and Vmpp voltage

Voc 355(VDC), Vmpp 310(VDC) for 2T model or 220V AC pumps

Voc 620(VDC), Vmpp 540(VDC) for 4T model or 380V AC pumps

Motor(pump) type

Control for permanent magnet synchronous motor (PMSM )and   asynchronous motor pumps ( all type 3 phase induction motor)

Rated output voltage

3-Phase,110V/160V/220V. 3-phase, 220V/380V/460V

Output frequency range

0~Maximum frequency 400Hz.

Efficiency

99.2 to 99.6%

Over load   capacity

G type for   submersible pumps, 150% rated current for 60s, 180% rated current for 3s

P type for surface   pump, 120% rated current for 60s, 150% rated current for 2s.

Solar pump   control special performance

MPPT ( maximum   power point tracking),auto/manual operation, dry run protection, low stop   frequency protection, minimum power input, motor maximum current protection,   flow calculating, energy generated calculating and water tank level detected.

Protection   function

Phase loss   protection, phase short circuit protection, ground to phase circuit   protection , input and output short circuit protection. Stall protection,   lightning protection, over heat protection.

Protection   degree

IP20, Air   force cooling

Running mode

MPPT or CVT

Altitude

Below 1000m;   above 1000m, derated 1% for every additional 100m.

Standard

AC input  backup circuit

CE, Design   based on AD800 series high performance inverter, more specification please   refer to AD800 series vector control inverter operation manual


 

Specification of frequency inverter when H9.00=0 for motor VFD.

H9.00=1, It works as solar pump    controller with MPPT, H9.00=0, it works as VFD when AC grid





Control   mode

Control mode

SVC   in open loop

V/F   control

Close   loop vector control*

Starting   torque

0.5Hz   180%

0.5Hz   150%

0.00Hz   180%*


Speed adjust   range

1:100

1:100

1:1000*


Speed   stabilizing precision



±0.02%*


Torque   precision

NO

NO

±5%


Motor type

General induction motor,

Permanent magnet synchronous motor (PMSM )*




Function   design

Highest   frequency

General vector control :400Hz    V/f control:4000Hz



Frequency   resolution

Digital setting: 0.01Hz    analog setting:maximum×0.025%




Carrier   frequency

0.5K~16KHz, the carrier frequency can be adjusted by temperature   automatically




Frequency   reference setting method

Digital of Control panel, analog AI1, AI2, potentiometer of   control panel, UP/DN control, communication, PLC pulse frequency




Acceleration./deceleration   characteristic

Linear curve and S curve accel. /decel. mode, range of time: 0.0   to 65000S.




V/F curve

3 mode: linear, multiple points, N Power




V/F separation

2 times separation: totally separation, half separation




DC braking

DC braking frequency: 0.0 to 300Hz, DC braking current: 0.0% to   100%




Braking unit

Standard built in for up to 4T22GB(22kw), optional built it for   4T37G~4T75G (18.5kw to 75kw), external built for above 4T93G (95kw).




Jog function

JOB frequency range: 0.0 to 50.0Hz, the acceleration and   deceleration time of Jog




Configured PID   function

Easy to perform pressure, flow, temperature close loop control.




PLC multiple   speed

To achieve 16 segment speed running through built in PLC or   terminal control




Common Dc bus

Multiple inverters use one DC bus for energy balance.




Auto voltage   regulation (AVR)

Enable to keep output voltage constant when grid fluctuation




Over load tolerance capability

G type model: 150% rated current for 60s, 180% rated current for   3s,

P type Model: 120% rated current for 60s, 150% rated current for   3s.





Stall protection control when   over current, over voltage

Carry out limiting automation for running current, voltage to   prevent over current, over voltage frequently



Rapid current limit function

Minimize the IGBT module broken to protect the AC inverter,   maximum reduce the over current fault.




Torque limit and torque   control

"Excavator" characteristics , torque limit   automatically during motor running. Torque control is available in close loop   vector control mode.




Features

Friendly interface

Display Hello when power on.



Multiple function key JOG   button

It can set for Forward Jog, reverse Jog, forward/reverse switch




Timing control function

A total running time and total running time calculating




2 group motor parameters

To achieve two motor switchover freely, control mode is selectable




Motor over heat protection

Accepting motor temperature sensor signal input via AI1 terminals.




Multiple kinds encoder *

Compatible collector PG, differential PG, and rotary transformer   Encoder( resolver).




Command source

Control panel, control terminals, series communication, switch   freely.




Frequency source

Digital setting, analog current/voltage, pulse setting, serial   communication, main and auxiliary combination.




Protection function

Short circuit detect when power on, input/output phase loss, over   voltage, over current, under voltage, over heat, over load protection.




Environment

Application   site

Indoor, free of exposure to sunlight, no dusty, no corrosive,   no inflammable gas, no oil and water vapor, and water dipping



Altitude

Lower 1000m




environment   temperature

-10℃~+40℃, power derated for 40~50℃, rated current derated 1% for 1℃ increasing.




humidity

Less than 95%, no water condense.





Views: 1581 Update: 2021-11-24
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