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Advanced SVG & RIP Bushing Solutions for Stable Power Grids
Specializing in HV/LV Bushings, SVG, AHF, and Transformer Components. IEC/IEEE Standard Compliant. Global Delivery.
Advanced SVG and APF systems deliver clean power, while high-performance RIP bushings ensure lasting insulation. With precision transformer monitoring and comprehensive switch-gear components, we build reliability into every connection — where durability meets innovation in power systems.
Yearning Lasting — Reliable power, lasting protection.
About Yearning Lasting
Powering the Future, Built to Last
Yearning Lasting Technology Ltd is a specialized provider of electrical power equipment. We focus on optimizing power quality (SVG/AHF) and supplying critical transformer components. We partner with top-tier ISO-certified manufacturers in China to ensure every product meets strict IEC standards；
Our Core Solutions
1. Power Quality Solutions
We help businesses and grids run cleaner and more efficiently. From harmonic filtering and reactive power compensation to full-scale power quality monitoring systems, our products reduce energy waste, prevent equipment damage, and ensure compliance with modern grid requirements.
2. Electrical Components & Monitoring
Safety and intelligence go hand in hand. Our transformer fiber-optic temperature monitors and switchgear accessories bring precision, durability, and digital visibility to critical assets—enabling predictive maintenance without downtime.
3. High & Low Voltage Bushings & Insulators
When it comes to insulation and reliability under high stress, our RIP dry-type bushings and composite insulators set the industry benchmark. Designed for minimal maintenance and maximum service life, they are the preferred choice for substations, transformers, and overhead lines worldwide.
Why Choose Us?
Engineered for Longevity – Every product is selected or designed with operational life and total cost of ownership in mind.
Technology-Driven – We integrate proven advanced technologies like fluorescence-based fiber sensing, dry-type RIP insulation, and smart modular capacitor design.
Global Standards, Local Support – Our products meet international certifications, and our team provides responsive technical and commercial support.
Solution-Oriented – Whether you need a single component or an integrated system, we work with you to deliver what truly fits your needs.
Our products
Bushings & Insulators/Power Quality Solutions/Electrical Components & Monitoring/
For over ten years, we have been a reliable partner to clients worldwide, delivering durable electrical components that keep grids stable and industries running.
High Voltage / Ultra-High Voltage Insulation Bushings Series
Resin-Impregnated Paper (RIP) Dry-type Bushings
Voltage Ratings: 40.5kV–800kV AC / ±160kV–±500kV DC
Core Advantages:
Oil-free, maintenance-free design, eliminating leakage risks
Vacuum-impregnated construction using imported electrical crepe paper and epoxy resin
Extremely low losses (tanδ ≤ 0.4%) and partial discharge levels (≤ 5 pC)
Unique buffer layer design suitable for extreme temperature variations (-60℃ to 80℃)
High-temperature vulcanized silicone rubber external insulation with excellent aging and pollution resistance
Applications:
Power transformer / reactor bushings
Converter transformer bushings (HVDC)
GIS bushings (SF₆-to-air)
Wall-through bushings (indoor/outdoor)
Oil-to-oil / oil-to-SF₆ bushings
2. Composite Insulation Bushing Series
Including post insulators, optical fiber composite insulators, GIS bushings, etc.
Voltage coverage: ±25kV to ±1100kV
Features: Silicone rubber integral molding, excellent hydrophobicity and mechanical strength
Reactive Power Compensation-harmonic filter-HV/LV Power quality products
I. Advanced Dynamic Power Quality Equipment
1. Static Var Generator (SVG)Product Description: Dynamic reactive power compensation device based on full-controlled IGBT technology, enabling bidirectional continuous compensation (-1 to 1) with power factor up to 0.99.
Core Technology: Three-level topology, DSP+FPGA full digital control, fast response (full response <5ms).
Product Series:
Standard SVG: 0.4kV, 10/15/20/25/35/50/75/100kvar (rack/wall-mounted)
High Voltage SVG: 6/10/35kV, 1-100Mvar (indoor/outdoor)
Enhanced ASVG: Additional low-order harmonic compensation (3rd, 5th, 7th, 9th, 25th)
Applications: Fast-varying load scenarios such as EV charging stations, rolling mills, cranes.
2. Active Power Filter (APF)Product Description: Real-time detection and injection of opposite harmonic currents for harmonic filtering, unbalanced load compensation, and reactive power compensation.
Core Technology: Dual DSP+FPGA architecture, three-level technology, positive-sequence phase-locked control, intelligent FFT algorithm.
Product Series:
Standard APF: 0.4kV, 30/50/75/100/150A (rack/wall-mounted)
High Voltage APF: 0.69kV, 50/100A
Filtering Capability: THDI < 5%, adjustable filtering range 2nd-50th order
Applications: High harmonic pollution scenarios such as VFDs, UPS systems, medium-frequency furnaces, rectifiers.
Expert Product Consultation
Fiber-Optic Temperature Controller for Transformers
A revolutionary monitoring solution designed for longevity and precision.
Core Advantages:
Intrinsically Safe & EMI Immune: Features a completely non-electrical, fiber-optic sensor. Immune to strong electromagnetic interference, high voltage, and corrosion.
Exceptional Accuracy & Stability: Provides reliable temperature measurement with an accuracy of ±1°C across a wide range of -40°C to +200°C.
Unmatched Durability: The quartz fiber sensor offers corrosion and aging resistance, delivering a service life equal to the transformer itself.
Maintenance Without Downtime: The sensor is permanent. Only the host unit requires service or upgrade, eliminating the need for transformer shutdown.
Long-Distance & Flexible: Optical signal transmission allows for distances up to 18 kilometers without degradation.
Smart & Compatible: Equipped with digital communication (RS485, 4-20mA, IEC61850) for easy integration into monitoring systems.
Key Specifications:
Measurement Range: -40°C to +200°C
Accuracy: ±1°C
Fiber Length: Standard 6m (Customizable up to 18km)
Outputs: 4-20mA, 4x Relay, RS485, IEC61850
Power Supply: AC 220V/50Hz
Protection Rating: IP55
MTBF: ≥50,000 hours
Genuine Experiences
Expert Reviews on Electric Trading
Yearning Lasting Technology's insights transformed our approach to HV/LV products, enhancing our efficiency and market understanding significantly.
“I manage the electrical systems for a busy shopping center. We had a serious issue: current harmonics were damaging our capacitor cabinets across multiple transformers, causing frequent failures and operational risks. After testing, we installed 600A of wall-mounted Active Power Filters (APF-150A-4) from Yearning Lasting. The compact wall-mounted design fit perfectly in our distribution room. The results were clear and fast. After commissioning, current harmonic distortion (THDI) dropped to about 3%, voltage quality improved significantly, and the damaging harmonic interference was eliminated. Our equipment is now protected, and system reliability has been restored. The Yearning Lasting APF units have been running stably and effectively since installation. It was the right product to solve our harmonic problem.” — Facility Manager, International Shopping Center
- Alex Chen
Yearning Lasting Technology Com. Ltd has tremendously enhanced our trading capabilities. Their tailored insights into HV/LV electric products have streamlined our operations and given us a competitive edge. We highly recommend their services.
-Madam Linda
“Since installing your power compensation system in our complex, our voltage has been much more stable during the summer peak hours. Residents have noticed their air conditioners running more effectively. The system works automatically and quietly, which makes our management job easier. Very pleased with the results!”
- Mr. bawan
Blog-power quality products
Development Stages of Reactive Power Compensation Devices
The evolution of reactive power compensation technology has progressed alongside the expansion of power systems, changing load characteristics, and advancements in power electronics. Its development can generally be divided into four main stages. Phase 1: Mechanically Switched Static Compensation (Early Days – 1970s) This phase was represented by fixed capacitor banks and mechanically switched reactors/capacitors. Key Devices: Circuit breaker or contactor-controlled shunt capacitor banks, synchronous condensers. Technical Features: Slow response (seconds to minutes), stepwise compensation, susceptibility to inrush currents and overvoltages during switching. Although synchronous condensers allowed smooth adjustment, they were costly, had high losses, and required complex maintenance. Applications: Primarily used for steady-state, centralized reactive power compensation in substations or large industrial users, aimed at improving long-term average power factor. Phase 2: Power-Electronically Switched Static Compensation (1980s – 1990s) The replacement of mechanical switches with thyristors enabled contactless, fast switching. Key Devices: Thyristor-Switched Capacitors (TSC), Thyristor-Controlled Reactors (TCR), and their combination in Static Var Compensators (SVC). Technical Features: Significantly improved response times (millisecond level), enabling phase-wise compensation and voltage flicker suppression. TCR allowed continuous adjustment of inductive reactive power, and combined with TSC, enabled smooth compensation across capacitive and inductive ranges. Applications: Widely adopted for compensating rapidly fluctuating loads such as rolling mills and electric arc furnaces, effectively mitigating voltage fluctuations and flicker, marking the beginning of the dynamic compensation era. Phase 3: Converter-Based Dynamic Compensation (2000s – Present) Centered on fully controllable power electronic devices (e.g., IGBT) and Pulse Width Modulation (PWM) technology, this phase represented a qualitative shift from "switching" to "generating" reactive power. Key Device: Static Var Generator (SVG, also known as STATCOM). Technical Features: Extremely fast response (<1 ms), capable of tracking and offsetting reactive power fluctuations in real-time. Continuous and smooth output, allowing stepless adjustment across capacitive and inductive ranges. Unaffected by system voltage; can deliver rated reactive current even under low-voltage conditions, outperforming SVC. Compact footprint with modular design for easy expansion. Applications: Became the preferred solution for applications demanding high power quality, such as renewable energy plants (wind, solar), data centers, electrified railways, and precision manufacturing. Phase 4: Intelligent and System-Integrated Compensation (Current and Future Trends) Compensation devices are evolving from standalone units into intelligent grid nodes. Key Characteristics: Functional Integration: Merging with Active Power Filters (APF) to form Unified Power Quality Conditioners (UPQC), providing comprehensive management of reactive power, harmonics, and voltage sags. Active Grid Support: In renewable energy integration, devices not only compensate for reactive power but also provide active voltage support, inertia response, and oscillation damping, shifting from "passive compensation" to "active interaction" with the grid. Digital Intelligence: Deep integration with IoT, AI, and big data. Smart algorithms predict load changes for proactive compensation and optimized control, while enabling remote monitoring, fault diagnosis, and energy management. Component-Level Innovation: Advances in capacitor dielectric materials (e.g., dry-type, metallized film) make devices safer, more compact, and longer-lasting. The adoption of wide-bandgap semiconductors like silicon carbide (SiC) further enhances the efficiency and power density of SVGs. Summary and Outlook The development trajectory of reactive power compensation devices clearly illustrates the evolution from mechanical to electronic, slow to fast, analog to digital, and single-function to system-integrated. Future advancements will focus on supporting modern power systems, moving continuously toward greater efficiency, intelligence, grid-friendliness, and integration. These devices will remain critical infrastructure for ensuring the safe, clean, efficient, and intelligent operation of power grids.
Comparison Between SVG and SVC Compensation Methods
1. Working Principle
SVC: An impedance-type compensator. It adjusts the equivalent reactance of thyristor-controlled reactors (TCRs) and works in conjunction with shunt capacitor banks to alter the system impedance at the connection point, thereby absorbing or supplying reactive power.
SVG: A source-type compensator. It uses voltage-source converters (VSCs) based on fully controllable semiconductor devices (e.g., IGBTs) to generate and inject a controlled AC current (reactive current) directly into the grid, independent of large passive components.
2. Key Components
SVC: Primarily based on thyristors (semi-controlled devices), capacitor banks, reactors, and harmonic filters.
SVG: Core components include fully controllable power electronic devices (e.g., IGBTs), DC-link capacitors, and sophisticated control circuitry.
3. Response Speed
SVC: Relatively fast response, typically 20–40 milliseconds.
SVG: Extremely fast response, usually under 5 milliseconds, and can reach sub-millisecond levels.
4. Output Characteristics (Critical Difference)
SVC: Its reactive power output capacity is proportional to the square of the system voltage. During voltage dips (when reactive support is most needed), its output capability decreases significantly.
SVG: Can maintain essentially constant reactive current output even during system voltage drops. It provides rated reactive support even under low-voltage conditions (e.g., 0.5 p.u.), offering far superior dynamic voltage support capability.
5. Harmonic Issues
SVC: TCRs generate significant harmonic currents during operation, requiring additional passive filters, which increases system complexity and cost.
SVG: Utilizes high-frequency PWM modulation, producing very low inherent harmonics. It is a "clean" compensation source and typically does not require large external filters.
6. Footprint and Losses
SVC: Larger footprint due to dispersed passive components like capacitors, reactors, and filters. Higher operational losses (approximately 0.5%–0.8% of rated capacity).
SVG: Compact footprint with modular, integrated design. Occupies about 1/2 to 1/3 of the space of an equivalent SVC. Lower operational losses (approximately 0.3%–0.5%), resulting in higher efficiency.
7. Control Complexity and Cost
SVC: Control strategy is relatively simple and mature. Lower initial investment cost.
SVG: Requires complex control algorithms for precise real-time current tracking and regulation. Higher initial investment cost, but offers advantages in overall lifecycle cost and performance.
8. Typical Application Scenarios
SVC: Suitable for cost-sensitive applications with very high compensation demands (e.g., HV transmission nodes) where ultra-fast response is not critical. Commonly used for voltage control and power factor correction in traditional grids.
SVG: Ideal for applications demanding high dynamic performance, limited installation space, or complex harmonic environments. The preferred solution for dynamic voltage support in renewable energy plants (wind, solar), impact loads (arc furnaces), data centers, and smart grids.
Key Summary: SVC compensates by "adjusting impedance," while SVG compensates by "actively generating" current. This fundamental difference makes SVG superior to SVC in response speed, low-voltage performance, harmonic characteristics, and compactness, representing the future direction of dynamic reactive power compensation technology.
Exploring Dry-Type GIS Bushings: The Secure & Reliable Choice for High-Voltage Connections
At the critical interface where modern power grids connect Gas-Insulated Switchgear (GIS) with external transmission lines, a core component is leading technological advancement with its exceptional performance: the Dry-Type GIS Bushing.
As the essential insulating interface between GIS and external overhead lines, it fulfills three critical functions: isolating high voltage, conducting high current, and mechanically supporting the conductor. Unlike traditional gas-filled bushings, its most significant technological breakthrough lies in its "all-solid insulation" fully sealed structure.
Currently, the mainstream technology represented by RIP (Resin-Impregnated Paper) Dry-Type Capacitive Bushings involves the precise vacuum impregnation and curing of materials like resin, paper, and film to form an integral insulation core that is gap-free and high-strength. This revolutionary design delivers multiple core advantages:
Ultimate Safety, Eliminating Leakage Risks: Completely eliminates the risk of insulating gas (such as SF₆) leakage, making it more environmentally friendly and maintenance-free.
Compact Structure, Enhanced Reliability: The integrated solid insulation structure offers high mechanical strength, excellent seismic performance, and immunity to external environmental factors (e.g., condensation, contamination).
Optimized Electric Field, Superior Performance: Built-in capacitive grading electrodes precisely optimize electric field distribution, resulting in extremely low partial discharge levels and extended operational lifespan.
Easy Installation, Broad Applicability: Lightweight design and flexible installation orientation significantly simplify on-site construction and overall GIS layout.
Dry-Type GIS bushings represent not just a technological upgrade but a precise response to the future demands of power grids for safety, reliability, compactness, and environmental sustainability. They are increasingly becoming standard components for new-generation smart substations and compact power transmission and distribution solutions, laying a solid foundation for building more resilient grid infrastructure.
Stay updated on high-voltage insulation technology frontiers. Choose reliable connections to power the energy future.
Dry-Type (RIP), Oil-Immersed, and Composite (GRP) Bushings: How to Choose?
For Ultimate Safety & Maintenance-Free Operation: Choose Dry-Type (RIP) Bushings. Oil-free, gas-free, eliminating leakage and fire risks, lifetime maintenance-free, especially suitable for GIS, high-altitude, and heavily polluted environments.
Traditional Applications with High Operational Costs: Oil-Immersed Bushings are common in older substations but pose risks of oil leakage, fire hazards, and require regular oil changes and maintenance, resulting in high lifecycle costs.
Economical Medium/Low-Voltage Solutions: Composite (GRP) Bushings offer lower cost and lighter weight, suitable for medium/low-voltage or temporary applications in mild environments, but their long-term insulation reliability and pollution resistance are relatively weaker.
One-Sentence Summary: Dry-Type (RIP) bushings, with their "solid insulation" technology, lead comprehensively in safety, reliability, environmental friendliness, and lifecycle cost, making them the preferred choice for modern, high-reliability power grid construction.
Tired of Traditional Reactive Power Compensation Cabinets? Try This "Smart" Module!
Do traditional reactive power compensation solutions (controller + contactor + fuse + capacitors + ...) cause these headaches for you and your team?
Complex Cabinet Layout: Too many components, messy wiring, numerous failure points.
Difficult Maintenance: Troubleshooting relies on guesswork, replacement is tedious and time-consuming.
Ineffective Compensation: Imprecise compensation, unable to address three-phase imbalance.
It's time to learn about Smart Capacitors.
This isn't just a simple component upgrade; it's a system-level integration revolution. A single module integrates four major functions: measurement & control, switching, protection, and the capacitor itself.
What makes it so "smart"?
It "Teams Up" on Its Own: When multiple units are connected, they automatically elect a "master" to form an intelligent network—no complex configuration needed. Master fails? The system immediately and automatically elects a new one. Zero downtime.
It Has "Sharp Eyes": Monitors over 20 parameters in real-time—voltage, current, power factor, temperature, etc. An LCD display shows fault causes directly in clear language, making maintenance straightforward.
It Works "Precisely": Enables per-phase compensation, specifically solving three-phase imbalance issues. Far more effective than traditional solutions.
Installs Like "Building Blocks": Modular design allows for simple side-by-side installation in cabinets. Need to expand? Just add modules. Need to replace? Supports hot-swapping. Boosts project efficiency by over 60%.
Two Options, Full Coverage:
Standard Smart Capacitor: Ideal for most scenarios where harmonics are within standards. Excellent cost-effectiveness.
Filtering Smart Capacitor (with reactor): Built-in reactor specifically for industrial sites with severe harmonic pollution. Protects equipment safety.
What Value Does It Ultimately Deliver?
Direct Cost Savings: Improves power factor, avoids penalty fees, reduces line losses.
Saves Time & Effort: Drastically simplifies installation, maintenance, and expansion.
Safe & Reliable: Intelligent protection, predicts risks, ensures production continuity.
Smart Capacitors are making reactive power compensation simpler, more reliable, and more intelligent.
Does your industry face similar power distribution challenges? Welcome to share and discuss in the comments!
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Yearning Lasting Technology Com. Ltd is a professional sourcing team based in xi'an. We bridge the gap between you and Chinese factories, ensuring quality and strictly controlling shipping time