On August 7, 2021, PCS-8910 fast switching voltage sag control independently developed by NR was officially put into operation in Shandong Jingbo Petrochemical. The formal commissioning of the project marks another major application of power grid voltage sag control in the industrial field.
The fastest voltage stabilization time is less than 10ms, effectively reducing enterprise production accidents caused by voltage sag and improving the power supply reliability of the power grid.
Voltage dip
The phenomenon of voltage sag in the power grid can easily cause the tripping or damage of sensitive equipment
The voltage sag also called "Voltage dip" refers to the sudden drop or almost complete loss of the effective value of the power supply voltage, and then it rises to near the normal value. The phenomenon of voltage sag in the power grid can easily cause the tripping or damage of sensitive equipment such as motors and inverters, causing major economic losses and safety hazards.
Shandong Jingbo Petrochemical is a large-scale private chemical enterprise focusing on the petrochemical industry, integrating petroleum refining and subsequent deep processing. The product production process is complex, and the requirements for stable operation of the grid voltage are high.
comprehensive system design
Relying on the technical accumulation of large-scale power grid stability control, rapid protection of power systems, and fast switching design, NR combines the actual grid structure and load distribution characteristics of Shandong Jingbo Petrochemical to carry out equipment installation positions, technical parameters, and protection configurations.
A comprehensive system design proposed a complete solution for voltage sag control based on the combination of fast fault detection and fast switching technology, which can realize the control of the 35kV bus voltage within 10ms when the 10kV side line fails.
voltage retention rate
Compared with the traditional governance method, this solution has the advantage of fast onset time
The voltage retention rate is not less than 90%, to ensure the stable operation of the important 35kV load. Compared with the traditional governance method, this solution has the advantages of fast onset time, good economy, and high reliability.
It can help enterprises achieve voltage dip governance at a minimum cost. It is highly recognized by Jingbo Petrochemical and successfully implemented.
Fast-switching voltage sag
NR fast switching voltage sag comprehensive management solution covers complete sets of equipment such as dual power supply, fast switching bus voltage maintenance, and fast AC circuit breakers.
It is controlled by optical fiber communication technology, which realizes the microsecond-level fast synchronization control between the fast switching and protection device and has exceptional online detection and fault diagnosis functions.
metal-enclosed armored switchgear
The installation is flexible and suitable for all types of new construction and renovation projects
The equipment adopts the structural design of standard metal-enclosed armored switchgear. The appearance and dimensions are the same as those of the conventional switchgear of the same level. The installation is flexible and suitable for all types of new construction and renovation projects.
The successful commissioning of a fast-switching voltage sag control system is another breakthrough in the safe power supply scheme of NR. It has realized the effective combination of fast-switching voltage sag control technology and power system stability control technology.
safe and reliable power supply
NR enterprise grid safe power supply scheme adds the new primary and secondary integrated fast switching technology and load side fast bus voltage maintenance solution, based on the previous stability control, machine-network coordination, electronic load power balance, SVC, and other dynamic reactive power compensator solutions. It provided a more powerful guarantee for the safe and reliable power supply of the enterprise power grid.
The complete set of solutions of fast-switching voltage sag comprehensive control solutions has a wide range of application scenarios in the chemical, metallurgical, and other industries. NR will continue to provide more contributions to the development of the power system.