High Voltage Capacitors Enhance The Performance For Photovotaic Systems
Authored by: Shanghai Yongming Electronic Co Ltd
Preface
Since the "Thirteenth Five-Year Plan", China has successively issued the "Notice on Publishing the Pilot Program for the Development of Distributed Rooftop Photovoltaic in the Whole County" and other relevant policies, which has greatly promoted the development of green buildings and building photovoltaic demonstration projects, driving the continuous demand for photovoltaic inverters. With the rapid development of small-size and high-stable performance technologies in photovoltaic power generation and new energy and 1200V IGBTs are popularized, manufacturers have put forward requirements for capacitors to withstand high voltage, large ripple current, and ultra-long life.
Photovoltaic inverter requirements for ultra-high voltage capacitors
Withstand ultra-high voltage:
Generally, high-power photovoltaic inverters directly incorporate the converted AC into the high-voltage power grid. Yongming's ultra-high withstand voltage capacitors can reduce the series connection of aluminum electrolytic capacitors and improve reliability.
High ripple resistance:
The current flowing through the capacitor of the photovoltaic inverter is 0.44 times the effective value of the output current of the inverter. The DC bus capacitor of the 100kW photovoltaic inverter needs to flow 112Ar.m.s current. Yongming aluminum electrolytic capacitors with high ripple resistance can reduce the number of electrolytic capacitors connected in parallel and improve the overall reliability.
Shanghai Yongming has been deeply involved in the aluminum electrolytic capacitor industry for more than 20 years. According to market research, it fully understands the difficulties and key points of customers in the application of photovoltaic inverters, and thus launches products with ultra-high withstand voltage and high capacity density. The main reason is that the inverter as the power density continues to increase, the voltage level continues to increase and frequent on and off, capacitors need to take into account both filtering and energy storage functions. Due to space constraints, the capacity density requirements are also increasing. In the inverter circuit, Yongming's ultra-high withstand voltage aluminum electrolytic capacitors with high capacity density perfectly fit the application scenarios and have been fully recognized by customers.
Yongming ultra-high voltage aluminum electrolytic capacitors are widely used in vehicle OBC, new energy charging piles, photovoltaic inverters, industrial robots and other fields. Years of production experience and rich technical accumulation have been applied to the production line of ultra-high voltage snap-in aluminum electrolytic capacitors to ensure mass production and product quality. Helping the development of photovoltaic inverter industry and exploring the new technology of electrolytic capacitor industry, Yongming Develops new products based on customers’ requirement and make electric energy more intelligent.