Black start means that when the whole power system stops running, the grid can restore power supply by starting the generator set without relying on external power. The start of power point is the key to black start, and Nanshan Power Plant is this key point in this case.
Kehua excels among many competitive enterprises and delivered a customized solution for the project, which includes a 9MW transformer-based energy storage turnkey solution and the key coordination control equipment for black start.
Under the coordination control, 18 PCS operated in parallel under VSG mode, driving the black start of 60MW gas engine. At the same time, the 9MW ESS is seamlessly connected with the 60MW gas engine to cooperate with the frequency modulation, and improve the efficiency and output electric energy index. Under the microgrid state, the motor load for black start can still operate stably in face of 7 times the impact.
This solution delivered by Kehua successfully overcomes the technical problems and realized “ESS Black Start”, “ESS Auxiliary Frequency Modulation” and “Source-Load-Storage Integration”. The successful implementation of the technical scheme is also the first in China, filling several domestic gaps in the application of black start.
As a highly reliable PV+ESS expert, Kehua’s strength in the field of energy storage is well recognized. The cumulative global installed capacity exceeds 1.1GW/3GWh. The application cases cover a variety of scenarios such as utility, industrial and commercial, and household power plants. Kehua has won the “2021 China's Top 2 Energy Storage PCS Company”, “2021 China Energy Storage Industry Most Influential Enterprise Award”, “2021 China Energy Storage Industry Best System Integration Solution Enterprise Award”, ” 2021 China's Energy Storage Industry Best PCS Supplier Award” etc.