Microgrid application plan
for Nigeria hotel project
2024.05
混合能源微电�?br/>一� Overview�?br/>1.1 Application overview
Project location�?Nigeria.
Load mode: hotel household appliances.
Usage overview:
The equipment mainly supplies power to the hotel, and
the total peak load is estimated to be about 200KW. There is
mains power on site, which is usually carried by the mains.
The photovoltaic energy storage equipment can be connected
in parallel with the mains to jointly bear the load. When
the mains power fails, the power supply can be seamlessly
transferred to the optical storage equipment. When the
optical storage equipment also fails or cannot meet the load,
the ATS switch is used to switch to the LPG gas genset, and
the gas genset takes the load.
1.2 Application configuration
According to the usage requirements and conditions, the
configuration is as follows:
The system is equipped with a 200KW energy storage
inverter system, a 210KWp photovoltaic system and a 430KWh
lithium iron phosphate energy storage system. The
photovoltaic system is connected in parallel with the energy
混合能源微电�?br/>storage system through DC coupling. The mains power is run
in parallel with the photovoltaic energy storage system
through a 200KW STS device. At the same time, the gas genset
is connected to the mains power supply system through an ATS
switch. It forms a 4-power joint power supply system
including mains electricity, photovoltaics, energy storage,
and generator units. The primary system diagram is as shown
below:
1.3 Run logic overview
The priority order of system power supply is
photovoltaic - energy storage - grid - generator set. The
specific work flow is as follows -
1. When photovoltaic energy is sufficient,
混合能源微电�?br/>photovoltaic power supply will be used first. When the
load demand for electricity is met, the battery will be
charged if there is excess power;
2. When the photovoltaic power generation cannot meet
the power demand of the load, the energy storage battery
delivers energy to the load. At this time, the
photovoltaic and battery power the load at the same time;
3. When photovoltaics and batteries cannot meet the
load operation and the grid is normal, the grid will
provide insufficient power, and the system controller
can control the grid to charge the energy storage battery.
4. When the power grid fails, photovoltaics and
energy storage give priority to powering the load. When
photovoltaics and batteries cannot meet the load
operation, the control system controls the generator to
start, and controls the ATS to connect the generator to
the power supply line, and the generator provides
insufficient power, at the same time, the system
controller can control the power grid to charge the
energy storage battery to improve generator utilization.
5. During the power supply process of the generator
a: When the photovoltaic or energy storage power
混合能源微电�?br/>meets the load power and the mains power has not been
restored, the system controller controls to disconnect
the generator power supply and switch to photovoltaic
and battery power supply;
b: When the mains power is restored, the system
controller controls to disconnect the generator power
supply and stop the generator, and switches to the mains
power supply, continuing the power supply logic of items
1, 2, and 3 above;
c: After the generator starts, the control system
controls the PCS to charge the battery, always keeping
the generator working at maximum efficiency (settable)
output, and improving the overall utilization of the
system.
6. The photovoltaic energy storage system adopts a
seamless switching method during the switching operation
with the mains or generator to avoid economic losses
caused by power outages.
二� Equipment technical data
混合能源微电�?br/>2.1 Energy storage converter data
Schematic diagram of energy storage converter module
Features�?br/>➢ Interleaved three-level topology, high equivalent
switching frequency, small ripple, and more stable system;
➢ Staggered magnetic integrated inductors have lower losses
and an overall conversion rate of up to 98%;
➢ With PQ, VF, SVG and other functions;
➢ Energy interaction with the power grid according to EMS
instructions;
➢ Wide temperature operating capability and wider
adaptability;
Datasheet:
Table 1 Parameter list of energy storage modules (for
reference)
混合能源微电�?br/>

混合能源微电�?br/>

混合能源微电�?br/>

This system is equipped with a 200kW PCS, which is composed
of 2 PCS modules.
2.2 PV DC/DC converter
Table 2 Parameter list of PV modules (for reference)

2.3 Parameters of Energy Storage Battery
Parameters of cell�?/span>
混合能源微电�?br/>

Parameters of PACK�?br/>

混合能源微电�?br/>Parameters of battery cluster�?br/>

This system uses two clusters of 215 KWh to form a 430 KWh
energy storage system.
2.4 Parameters of PV panel�?br/>The PV system uses a total of 385 PV panels of 540Wp to
form a PV array, and the capacity of the PV system is 385×
540Wp=207.9KWp. The parameters of a single photovoltaic panel
混合能源微电�?br/>are as follows:
混合能源微电�?br/>2.5 Parameters of generator set
混合能源微电�?/span>
混合能源微电�?/span>
混合能源微电�?br/>三� III. Configuration list and quote