A 170 kWp rooftop grid connected system with synchronization of Diesel generators and solar inverters has been designed and successfully commissioned by Lume Solar Energy Private Limited (a leading solar EPC company in India) at Western Suitings Pvt. Ltd.
This Solar installation was commissioned in less than a month and Lume Solar have used ABB string inverters which works upon synchronization either with the grid or DG set (125KVA). The generated electricity from the plant during the daytime can be consumed by the plant load and there is no need for battery bank considering the huge loads. The grid and DG set are connected through PLC Panel and the Diesel generators start automatically during power cuts.
There is less commercial benefit in running a generator just for reference voltage and current for the entire day time. But this can be economical for the above discussed condition i.e. just during the power cut period. The DG sets running at lower efficiency (20-30%) or less than its rated value can consume more fuel than during rated power (i.e. 85-100% efficiency), so operating it during the entire day just for reference parameters or in parts where there is no grid power (remote locations or forest regions) is not economical.
In such remote regions where there is no grid connection or very less grid power, off grid solar PV systems with battery backup will be the best option, and even along with DG sets when the loads are huge. In regions of frequent power cuts, there is also an option of using a smaller DG set, to synchronize with the solar Grid Tied inverters just for the emergency load rather than the required full load size. But the disadvantage here is during power failure in the evenings or during the night, the load will be much higher than the generator system. So care must be taken care during system sizing, and we must make sure that the size of the generator is sufficient enough to supply required amount of energy during emergency or power cuts.
While considering a Grid Tied inverter the load pattern (early morning and evening peaks), grid availability (Grid Tied inverters can be tricky at times of frequent power failures), grid quality, feed in tariff (if available) have all to be reckoned and coordinated with. However, the challenge lies in designing an efficient power management control system for smart and economical power consumption.
In case your solar plant is facing grid failure, or low or high voltage, reach to Lume Solar on (+91)955805773/ (+91)9460600282 or at sales@lumesolar.com / connect@lumesolar.com .
Lume Solar will ensure your DG set comes into service. PV system shall be synchronized with DG supply and load requirement would be met to the extent of availability of power”.
