Low, medium and high power, Smart Grid Systems projects
Inverters designed specially for smartgrid systems in three categories; On grid inverters (Bidirectional Current inverter), Off grid inverters (Voltage Inverters) and Off and on grid inverters with power factor control (current and voltage inverters wit the capability to switch between them). The system comprises single equipments from 10 Kva up to 1 MVa and can compose even larger systems up to several MVAs through paralleled units.
In the current mode for on grid systems, the inverter tracks the current waveform of the line, with the capability to transfer energy in both directions. The controled variable is the output or input current, depending the situation of the system. In a third state, when our system is consuming the energy coming from outside (From Grid), the system can be used to track the current with the intention to control the power factor of the load. This is usefull, because the control of the power factor leads to better consumption. This is possible due to the DSP controller that is extremely fast.
In the case of voltage inverters in off grid systems, do not matter the current waveform and the system supply very low distortion sinusoidal wave, totally free of disturbances and transient in its output.
The solar cells panels give the total amount of energy needed by the system during the solar periods and a special converter adapt the voltage and the input cirrent depending the needs of the system.
Solar panels presents its intrinsic properties being a relationship between voltage and current that depends directly from incidence of light and the ambient temperature. The curve of voltage versus current is greatly affected by those parameters, leading to the necessity of tracking of the proper load for maximum efficiency. This is accomplished by the. MPPT (Maximum Power Point Tracking ). Normally is added to the converter that adjusts it´s input impedance for that needed by the solar cell to transfer it´s maximun energy. Our MPPT uses an exclusive neural net MPPT system that inteligently tracks the better situation;
The topology of the converter of the MPPT is common for both applications, with wind turbines or solar cells, depending so only of hardware and software configurations. The converter can optionally work like battery charger that completes the whole needs of the system.
The system is entirely modular and due to its nature, Many cabinets can be put in parallel, configuring higher power systems.
The system supports the utilization of group generators to supply it during the days that the energy would not be supported by wind or light or even by the grid. Many situations and combinations can be observed to improve the energy consuption or even cost
A forced commutation static switch controls the connection of the system to the grid and the switch can be operated in any instant of the line cycle.
The system configuration and all adjustments are done by remote software and the entire system can be managed remotely through our software (CAP SYSTEM MANAGER) or even through SNMP and TCP/IP protocolls and INTERNET.
Below can be seen the block diagram of the entire system. The converter, MPPT, Inverter, the forced commutation Static switch, DSP control and protection circuits. All are built inside the cabinet. The module dimensions for 10 Kva up to 30 Kva are 1100 Height , 550 Width and 358 Depth. All other models from 40Kva up to 1Mva are cabinets with 2000 Height, 800 depth and various widths, depending power, can be of 800, 1000, 1200 and 1400mm in FF frame like for our UPS systems. See clicking Here : Presentation and features and Here Mechanical structures for power systems and Here as examples: The project as a Whole that were used to compose UPS mechanical structures, are used here to compose smart grid systems. Even certain internal parts. In this way, all the systems have a very high level of integration and modularity.
As for the (Click Here) cards used in the systems , they are exactly the same those as employed in UPS systems unless regarding hardware configurations and software used that are completely different. This gives a very high degree of uniformity and brings the system to a very high reliability since those cards are already employed for approximately 6 years and demonstrated an extremely high level of reliability.
For smart grid systems up to 100 Kva, are used IPM (Intelligent Power Modules) that presents very high level of integration and reliability, besides that very high technological level, enabling an extra protection due to its intrinsic short circuit, overload, over temperatures and overvoltage sensors.
TMN= Transmission Management Network
FCSSW = Forced Commutation Static Switch
MPPT = Maximum Peak Power Tracking
MG Set Motor Generator Set
