The PetroChina Dushanzi Petrochemical Tarim 1.2 million tons/year Phase II Ethylene Project achieved successful first-feed commissioning, marking the official commissioning of China's first ethylene plant with fully electric-driven compressors using indigenous technology. Shanghai Nancal Electric Co., Ltd. overcame multiple technical bottlenecks and successfully developed ultra-large capacity, high-reliability medium voltage drives for the million-ton-class ethylene plant. This solution can be applied to both new million-ton-class ethylene projects and retrofit upgrades of existing units.
As a critical downhole conveying equipment, the ESP variable frequency drive system faces three major challenges: long-cable transmission, choke signal interference, and harsh on-site operating environments. Nancal Electric's medium voltage drives, based on cell series multi-level topology, with long-cable adaptive control as the core and choke system compatibility as a distinctive feature, effectively address industry pain points through deep integration of hardware optimization and software algorithms.
In metallurgical steel production, sintering main exhaust fans consume significant energy, and traditional starting methods suffer from high inrush current and severe energy waste. Nancal Electric retrofitted a steel plant's sintering main exhaust system with medium voltage VFDs, achieving soft start and variable frequency speed regulation in a "two-drive-two" configuration with manual mutual backup. Committed to energy savings and customer cost reduction, we are always taking action.
This medium voltage drive has been in stable operation on-site for over three years and has withstood multiple grid voltage sags of varying severity.The power cell fast automatic bypass design and the Low Voltage Ride Through (LVRT) capability of Nancal Electric's medium voltage drives address internal cell failures and external grid voltage sags, respectively, effectively preventing unplanned shutdowns caused by such issues.
A well-known domestic chemical enterprise planned to implement an energy-saving, emission-reduction, and capacity-expansion project for its polycarbonate production unit. This included converting the originally steam-driven MVR steam compressor to electric drive. The MVR steam compressor system was originally driven by a high-speed steam turbine (referred to as the steam turbine), directly connected to the drive shaft of the high-speed centrifugal compressor. The NC HVVF series medium voltage drives provided by Nancal Electric delivered excellent high-frequency drive performance and system safety control performance for the high-speed PMSM in this MVR steam compressor "steam-to-electric" retrofit project of a polycarbonate production unit, providing highly reliable and sustainable technical support for the project retrofit.
The Reactor Coolant Pump (RCP) Drive is a critical single-point-of-failure electrical equipment in the third-generation AP1000 nuclear power plant. In 2022, Shandong Nuclear Power Company Ltd., Shanghai Nuclear Engineering Research & Design Institute, and Shanghai Nancal Electric Co., Ltd. initiated a collaboration and successfully developed an RCP Drive for the third-generation AP1000 nuclear power plant in 2023. This significantly enhances the operational reliability of the RCP Drives and the flexibility of standby RCP Drive switching, further improving the operational reliability and economic efficiency of AP1000 nuclear power units.