Growatt SPH 4000-10000TL3 BH-UP handleiding

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6.4.2 Three-phase independent export limitation mode

The limited feed-in power configured in this mode in percentage limits the algebraic sum

of the total three-phase power drawn from and fed to the grid, and the three-phase

power is equally divided among three phases with each phase not exceeding the average

value of the preconfigured exported power. The power fed to the grid is counted as

negative value.

For an inverter with a maximum output power of 10 kW, if the percentage of feed-in

power is set to 10%, the algebraic sum of the power drawn from the grid and the power

fed to the grid in this mode should be not less than -1 kW, and the value of the power

flowing into the grid for each phase cannot be less than -0.33 kW. If the energy flow per

phase is about to go over the limit (-0.33 kW), the inverter will reduce the output power to

stop this tendency.

6.4.2.1 Three-phase system with balanced loads

Figure 6.6 shows the three-phase system with balanced loads. The inverter side can

provide enough power to the load (power provided by the inverter side is not less than

2+2+2=6 kW). The total inverter output power is not greater than the sum of the total

load power and the preconfigured exported power (2+2+2+1=7 kW). At this time, the

three-phase output of the inverter side is balanced; the three-phase power of the grid side

is balanced, and it is only allowed to feed power to the grid.

Figure 6.6

2kW

2.3kW

-0.3kW

2.3kW

6.9kW

-0.9kW

2kW

-0.3kW

Figure 6.7 shows the three-phase system with balanced loads. The inverter side cannot

provide enough power to the load (power provided by the inverter side is less than

2+2+2=6 kW). The total inverter output power is not greater than the sum of the total

load power and the preconfigured exported power (2+2+2+1=7 kW). At this time, the

three-phase output of the inverter side is balanced; the three-phase power of the grid side

is balanced and it is only allowed to draw power from the grid.

Figure 6.7

Figure 6.8

6.4.2.2 Three-phase system with unbalanced loads

Figure 6.8 shows the three-phase system with unbalanced loads. The inverter side can

provide enough power to the load (the power provided by the inverter side is not less than

1+2+3=6 kW), and each phase can provide enough power to the load (the load power of

each phase is not greater than 3.3 kW). The total value of the inverter output power is not

greater than the sum of the total load power and the preconfigured exported power

(1+2+3+1=7 kW). At this time, the three-phase output on the inverter side is unbalanced;

the three-phase power on the grid side is not necessarily balanced and it is only allowed to

feed power to the grid.

1kW

2kW

1.3kW

2.3kW

-0.3kW

3.3kW

6.9kW

-0.9kW

3kW

-0.3kW

2kW

1.5kW

0.5kW

1.5kW

4.5kW

1.5kW

2kW

0.5kW

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