Hybrid Static Var Genrator contactor Switching
Hybrid Static Var Genrator contactor Switching
To meet the requirement of continuous reactive power compensation with low cost, high reliability and large capacity, a hybrid Static Var Generator was proposed based on TSC (thyristor switched capacitor in parallel) and SVG (static var compensator). This system consisting of discrete subsystem TSC and continuous subsystem SVG, coordinated the capacitor switching rating of TSC with dynamic compensation of SVG by using two hybrid control laws based on expert decision making, made full use of their respective advantages. The machine learning approach was applied to avoid repeated movements of capacitors and extend equipment life.
ELPQC-HPFC Hybrid Static Var Generator
ELPQC-HPFC Hybrid Static Var Generator adopts the configuration scheme of combining ELPQC-ASVG Advanced Static Var Generator and switching capacitor/reactor, and implements different reactive compensation schemes according to the actual needs of users on site, so as to achieve the best combination of price and effect.
ELPQC-HPFC Hybrid Static Var Generator device consists of two parts:
Static Var Generator and switching capacitor/reactor reactive compensation unit. In ELPQC-HPFC hybrid dynamic reactive power compensation devices, each unit is designed and produced using low-power, small-volume and low-cost technology, and both units can be optionally combined in the best and most flexible way according to the actual reactive state of the site.
A united system of thyristor switched capacitor (TSC) and ELPQC-SVG static var generator was proposed to improve voltage regulation, stability, and power factor in AC transmission and distribution systems.
The TSC is composed of multi-groups binary-coded capacitors, mainly used for large capacity VAR compensation step by step. ELPQC-SVG compensates small capacity reactive power continuously and filters harmonics generated by nonlinear loads.
When ELPQC-SVG compensates harmonics using traditional control methods, oscillation may occur if the SVG controller does not consider the interaction between TSC and SVG. Therefore, a predictive control algorithm for TSC is adopted to ensure proper compensation when load changes rapidly.
The proposed united compensation system can implement continuous reactive power and harmonic current compensation cost-effectively.
Modular Design
ELPQC Static Var Generator has an advanced modular design. Usually ELPQC-SVG consists of one or several SVG modules and an optional touch LCD Human Machine Interface. Each SVG module is an independent harmonic filtering system, and users can change the harmonic filtering system rating by adding or removing SVG modules.
According to the mounting type, ELPQC-SVG can be divided into Rack Modular SVG, Wall-mounted SVG,
and Free-standing SVG.
Model Description
ELPQC-HPFC Hybrid Static Var Generator series covers from 100kVAr to 500kVAr per cabinet and supports SVG-controlled thyristor switched capacitors (or contactor switched type).
| SN | Item | Rated Capacity | Factory Model | Dimensions (W×D×H mm) | N.W (kg) | Packing Size (W×D×H mm) | G.W (kg) |
|---|---|---|---|---|---|---|---|
| 1 | HPFC | 100kVAr | ELPQC-HPFC/100-4.4L-50k | 800×1000×2200 | 300 | 990×1140×2455 | 340 |
| 2 | HPFC | 150kVAr | ELPQC-HPFC/150-4.4L-50k | 800×1000×2200 | 320 | 990×1140×2455 | 360 |
| 3 | HPFC | 200kVAr | ELPQC-HPFC/200-4.4L-50k | 800×1000×2200 | 340 | 990×1140×2455 | 380 |
| 4 | HPFC | 250kVAr | ELPQC-HPFC/250-4.4L-50k | 800×1000×2200 | 360 | 990×1140×2455 | 400 |
| 5 | HPFC | 300kVAr | ELPQC-HPFC/300-4.4L-50k | 800×1000×2200 | 380 | 990×1140×2455 | 420 |
| 6 | HPFC | 350kVAr | ELPQC-HPFC/350-4.4L-50k | 800×1000×2200 | 380 | 990×1140×2455 | 440 |
| 7 | HPFC | 400kVAr | ELPQC-HPFC/400-4.4L-50k | 800×1000×2200 | 400 | 990×1140×2455 | 460 |
| 8 | HPFC | 450kVAr | ELPQC-HPFC/450-4.4L-50k | 800×1000×2200 | 400 | 990×1140×2455 | 480 |
| 9 | HPFC | 500kVAr | ELPQC-HPFC/500-4.4L-50k | 800×1000×2200 | 420 | 990×1140×2455 | 500 |
ELPQC-HPFC: A united system of thyristor switched capacitor (TSC) and ELPQC-SVG static var generator was proposed to improve voltage regulation, stability, and power factor in ac transmission and distribution systems. The TSC is consisted of multi-groups binary-coded capacitors, which is mainly used for large capacity var compensation step by step. ELPQC-SVG compensates small capacity reactive power continuously, and filters harmonics generated by the nonlinear load.
Cost Effective
- High cost performance
- Ultra-compact SVG Modular
- Fastest switching frequency 25.6kHz
- Lowest power consumption ≤ 2.5%
- Leading dissipation technology
Optimal Harmonic Filter
- Self-adaptive(ADALINE) algorithm
- THDi Less than 5% at rated load
- High filtering efficiency Up to 98%
- Fast response time ≤5ms
- Selective or Full compensation
Power Quality Control
- Continuous power factor correction
- Both capacitive and inductive control
- Precise PF maintain -1.0 ≤ CosΦ ≤ 1.0
- 3 phase load balance ≤ 5%
- Mitigates neutral current
High Quality Assurance
- TI DSP, Infineon or Semikron IGBT
- Advanced TSC
- High Stability, avoids harmonic resonance
- Both Hardware and software protection
- Good Environmental adaptability
ELPQC-HPFC Hybrid Static Var Generator has many advantages: Intelligent operation, Fast response time, Flexible modules combination, Smooth compensation and Friendly Human Machine Interface, especially the high cost performance.
Technical Data and Specifications
ELPQC-HPFC Hybrid Static Var Generator is available in a wide range of ratings to serve various customer applications. Its modular design enables flexibility in installation and integration. The inherent energy-efficient design, three-level topology, and optional user-friendly Human Machine Interface, control capacitors, deliver excellent performance and cost effectiveness.
| Rated Voltage | 400V (300~456V) |
| Rated Capacity | 50kVAr ~ 500kVAr |
| Mains Frequency | 50/60Hz ±5% |
| Circuit Topology | Three Level |
| Multi Compensation Mode | Harmonic Compensation, Reactive Compensation, Three-Phase Load Unbalance Compensation |
| Filter Range | 2nd ~ 25th Order Harmonics (Selective or Full Compensation) |
| Rated Harmonic Reduction | ≥97% (For Typical Harmonic Order Distortions) |
| Filtering Performance | Typically THDi ≤ 5% at Rated Load (Even with Most Complex Loads) |
| Target Power Factor | System PF Greater Than 0.98 After Compensation |
| 3-Phase Load Balancing Effect | ≤5%, Mitigates Negative and Zero Sequence Currents |
| Neutral Filtering Capacity | 3 Times Rated Filter Current (For 4-Wire Devices) |
| ASVG Switching / Control Frequency | 25.6kHz |
| ASVG Response Time | ≤5ms |
| Capacitor Control Interface | 16 Ways |
| Capacitor Switching Switch | Thyristor / Contactor |
| Capacitor Response Time | ≤1s |
| Active Loss of System | ≤2.5% |
| Output Current Limit | Automatically Limited Within 100% of Rated Capacity |
| Control Algorithm | Intelligent FFT, Self-Adaptive Control Algorithm |
| Controller | DSP + FPGA |
| Protection | Hardware Protection, Software Protection |
| Control Connection | Fiber or Electrical Connection |
| Human Machine Interface | 7-inch Touch TFT LCD HMI |
| Communication Protocols | Modbus Remote Communication Protocol, RS485 and CAN Bus Support, Mobile APP Operation |
| Noise | <60dB (<45dB During Low-Speed Operation) |
| Installation Method | Rack Mounted, Wall Mounted, Free Standing Modular Design |
| Level of Protection | IP20 |
| Cooling Method | Intelligent Variable-Speed Air Cooling (PWM Fans) |
| Color | RAL 7035 Light Grey |
| Ambient Temperature | -20°C ~ +55°C |
| Relative Humidity | Maximum 95%, Non-Condensing |
| Mounting Height Above Sea Level | ≤2000m at Rated Capacity; Above 2000m Requires Derating (1% Capacity Reduction Per 100m) |
| Qualifications | CE, IEEE61000, Type Test Report |
| Compliance Standards | IEEE 519, ERG5/4 |
Automotive Industry
A united system of thyristor switched capacitor (TSC) and ELPQC-SVG Static Var Generator was proposed to improve voltage regulation, stability, and power factor in AC transmission and distribution systems. The TSC is composed of multi-group binary-coded capacitors, mainly used for large-capacity VAR compensation step by step. ELPQC-SVG compensates small-capacity reactive power continuously and filters harmonics generated by nonlinear loads.
The Industry
Traditional automotive manufacturing processes vary among manufacturers. However, in recent years, automation transformation has accelerated, including the adoption of high-end CNC punch presses, flexible automatic production lines, coating robots, welding robots, lifting robots, and industrial robots.
While automation equipment improves production efficiency and reduces labor requirements, it also introduces several power quality challenges.
The Problem
Automotive manufacturing is a typical heavy industry with large electricity demand, low power factor loads, nonlinear loads, and
frequent impact loads. These characteristics require a high standard of power quality management.
The industry contains a large number of rapidly changing loads, resulting in significant reactive power fluctuations. Traditional
capacitor-based reactive power compensation systems cannot respond quickly enough to these load changes.
The Solution
To address rapid load fluctuations, a corresponding Static Var Generator (SVG) system is configured to provide dynamic reactive power compensation.
A 300kVAr Hybrid Static Var Generator Panel was installed on-site to maintain the power factor at approximately 1.00 in real time while ensuring stable voltage and improved power quality.
The Technical Performance
The Customer Benefits
After installing the Hybrid Static Var Generator system (SVG + TSC Control), the site achieved compliance with IEEE 519, G5/4, EN 50160 and other international power quality standards and recommendations.
- Energy savings
- Higher productivity
- Reliable plant operation with reduced maintenance costs
- Additional electric capacity within the existing electrical network
- Quick return on investment
Installed Countries
ELPQC Power Quality Devices (Active Power Filter, Static Var Generator, and Hybrid Compensation Systems) have been successfully installed in numerous countries worldwide, including:
United Kingdom, Belgium, Netherlands, Poland, Spain, Turkey, Pakistan, India, Indonesia, Singapore, Thailand, Vietnam, Australia, Canada, Mexico, Colombia, South Africa, United Arab Emirates, Saudi Arabia, and China.
