As a global leader in power efficiency and power quality solutions, ZHIMING Group is dedicated to providing safe, reliable, and efficient power transmission and distribution support for modern grids and advanced industrial facilities. Our High Voltage Power Capacitor product series is a core component for building smart grids and enhancing energy efficiency, integrating ZHIMING’s cutting-edge technology in high-voltage insulation materials, structural design, and system integration. We understand that stable and efficient reactive power compensation is key to ensuring long-distance transmission capacity and optimizing grid voltage quality. Therefore, every High Voltage Power Capacitor manufactured by ZHIMING adheres to the most stringent international standards (such as IEC, IEEE, and ANSI), designed to help your power system significantly enhance transmission line capacity, effectively reduce network losses, and maintain voltage stability, providing a solid foundation for the robustness and economical operation of the grid.
What is a High Voltage Power Capacitor?
A High Voltage Power Capacitor typically refers to a capacitor used in AC power systems with voltage levels from 6kV to 110kV and above. It provides capacitive reactive power to the system to balance the reactive consumption generated by inductive loads like transformers and motors, thereby achieving power factor correction, maintaining system voltage stability, and improving power quality.
The Core Value of Using ZHIMING High Voltage Power Capacitors
1. Increased Transmission Capacity & Efficiency
In long-distance transmission lines, series or shunt compensation can effectively increase the line’s natural power and enhance transmission capacity, enabling existing grid infrastructure to achieve greater performance.
2. Stabilized Grid Voltage Levels
By injecting or absorbing reactive power, they quickly respond to grid voltage fluctuations, maintaining voltage stability at critical nodes, preventing voltage collapse, and improving power supply reliability.
3. Significant Reduction in Grid Losses for Energy Savings
Improving the power factor and reducing reactive current flow in the grid can substantially lower copper and iron losses in transformers and lines, directly saving energy costs and aligning with energy conservation policies.
4. Harmonic Filtering for Grid Purification
As key components in filter banks, they can effectively absorb and filter specific order harmonic currents, protecting sensitive equipment from harmonic interference and enhancing overall power quality.
Application Scenarios
ZHIMING High Voltage Power Capacitors, known for their exceptional electrical performance and environmental adaptability, are widely used in the following critical fields:
1. High Voltage Transmission & Distribution Systems
Applied in substations and distribution networks at 110kV and below voltage levels for centralized reactive power compensation, supporting system voltage, and improving power factor.
2. Series Compensation Stations
Installed in transmission lines to directly enhance line transmission capacity and stability by compensating for line inductance.
3. Large Industrial Users
Used in the main substations and distribution systems of large factories (e.g., steel, metallurgy, chemicals, automotive manufacturing) to compensate for reactive power generated by impact loads like large rolling mills and arc furnaces, preventing voltage flicker and penalties.
4. New Energy Generation Grid Integration
Applied in the boost stations and grid connection points of photovoltaic power plants and wind farms to meet grid code requirements for reactive power compensation and voltage support, ensuring stable delivery of clean energy.
5. Harmonic Mitigation & Filter Applications (SVC, Filter Banks)
Serving as core components in High Voltage Harmonic Filter Banks and SVCs (Static Var Compensators), specifically designed for harmonic filtering and dynamic reactive power regulation.
Advantages & Technical Highlights of High Voltage Power Capacitors
ZHIMING Group ensures our High Voltage Power Capacitors deliver outstanding performance even in complex and harsh environments through continuous R&D and stringent quality control:
1. All-Film Dielectric & Advanced Impregnation Technology
Utilizes high-quality all-polypropylene film (all-film) as the dielectric, impregnated with environmentally friendly insulating fluid (non-toxic, non-PCB), achieving very low dielectric losses (typically below 0.2 W/kvar) for significant energy savings.
2. Robust, Safe Construction & Protective Design
The enclosure is made of high-quality steel with sealed welding, offering high mechanical strength and weather resistance. Integrated discharge resistors ensure residual voltage reduces to a safe level within a specified time (e.g., 10 minutes) after de-energization, ensuring personnel safety.
Offers various internal protection configurations, including internal fuses, external fuses, and fuseless options, to handle element failures and prevent fault escalation accurately.
3. Wide Operating Range & Excellent Environmental Adaptability
Product design complies with relevant international standards, capable of stable operation within a wide ambient temperature range of -40°C to +45°C (or wider).
Assembled or Tank-type designs are compact and easy to maintain, especially suitable for outdoor substations and other sites with limited space and complex environments.
4. Long Service Life & High Reliability
Thanks to premium materials, meticulous craftsmanship, and multiple protections, ZHIMING High Voltage power Capacitors have a design lifespan that far exceeds the industry average, with an extremely low failure rate, providing users with long-term, stable reactive power support.
FAQ
Q1: What is the typical voltage and capacity range for High Voltage Power Capacitors?
A1: ZHIMING High Voltage Power Capacitors cover standard rated voltages from 6kV, 10kV, 35kV up to 110kV. The capacity of a single capacitor unit can be customized based on project needs, covering a wide range. For example, the capacity of an assembled capacitor bank can reach thousands of kvar.
Q2: What are the key operational precautions for HV power capacitor banks in substations?
A2: Safety is the primary principle. During a total station power outage, the power capacitor bank circuit breaker should be opened first. When re-energizing, the power capacitor bank should be the last to be switched on. Energizing a charged power capacitor is strictly prohibited. Before re-closing, ensure the power capacitor is fully discharged (typically requiring waiting at least 3-5 minutes after disconnection).
Q3: What are the common protection measures for HV power capacitors?
A3: To ensure safe operation, HV power capacitors are typically equipped with unbalanced current protection, overvoltage protection, overcurrent protection, and instantaneous protection. Additionally, internal power capacitor elements may be fused to quickly isolate a failed component, allowing the rest of the bank to continue operating.
Q4: Are ZHIMING’s HV Power Capacitors suitable for global applications?
A4: Yes. ZHIMING places high importance on product compliance and global applicability. Our High Voltage Power Capacitors, including assembled types, are designed and tested in accordance with major international standards such as IEC and IEEE, ensuring they meet the technical performance, safety, and reliability requirements for power grids and industrial applications worldwide.
