C-SVG Static Var Generator

Product Introduction

Compared with traditional SVC devices represented by TCR, C-SVG has faster regulation speed, wider operating range, and compensates for sinusoidal current without harmonic components after adopting measures such as multiplexing, multilevel or PWM technology. More importantly, the reactors and capacitors used in C-SVG are much smaller than those used in SVC, which will greatly reduce the size and cost of the device, and have a much longer service life than traditional reactive power compensation devices. The superior performance of C-SVG demonstrates the development direction of dynamic reactive power compensation devices.

Simply put, the basic principle of C-SVG is to directly connect the self commutation bridge circuit in parallel to the power grid or connect it in parallel through a reactor. By appropriately adjusting the phase and amplitude of the AC output voltage of the bridge circuit, or directly controlling its AC current, the device can absorb or emit reactive current that meets the requirements, achieving the purpose of dynamic reactive power compensation.

The C-SVG static reactive power generator integrates dynamic reactive power compensation and dynamic filtering, using high-performance control chips and fully controlled power electronic devices. It applies the most advanced control theory and fully digital control methods to detect the load current in the power grid in real time, quickly separate reactive and harmonic current components, and generate control instructions based on the magnitude of reactive and harmonic currents. It injects equal and opposite compensation currents into the power grid in real time to achieve instantaneous reactive power compensation and harmonic filtering. It has superior performance, fast response speed, high compensation efficiency, easy installation and operation, simple maintenance, and compensation performance not affected by system parameters. It is the most ideal reactive power compensation product.

Performance characteristics and advantages

The C-SVG static reactive power generation device is a high-tech product aimed at the 21st century, which breaks through the traditional theory of capacitor and reactance reactive power compensation. It integrates power electronics technology, computer technology, and modern control technology, and is applied to reactive power compensation in distribution systems. It can achieve continuous and rapid reactive power regulation from inductive to capacitive, effectively suppress voltage fluctuations and system oscillations, improve three-phase load imbalance, enhance system stability, and achieve significant benefits in energy conservation, consumption reduction, and power supply equipment capacity expansion. For example, when C-SVG is used for compensating loads such as welding machines, electric arc furnaces, and calcium carbide furnaces, the average power consumption can often be reduced by 4% -15%, and the economic benefits are very significant.

The full range of products from 20 to 560kvar includes cabinet and modular structures, supporting various cabinet installation methods.

The controller uses a DSP+ARM control system and adopts the optimal dual loop control technology. The C-SVG compensation capacity is the installed capacity, achieving the same compensation effect. The C-SVG capacity can be 20% -30% smaller than the SVC capacity.

C-SVG adopts an active compensation circuit, and the compensation capacity is minimally affected by the system voltage. When the system voltage drops, it can also output reactive current similar to the rated operating conditions. It can dynamically adjust reactive power in both directions (-1~1) continuously, with a full dynamic response time of 5-10ms (instantaneous response time less than 100 μ s), without resonance or harmonic voltage amplification, and can continuously output reactive power from rated inductive conditions to rated capacitive conditions.

C-SVG can compensate for harmonic currents up to 30% of its rated capacity while outputting reactive power at full load.

• It has complete protection functions, including overload, overvoltage, undervoltage, overcurrent, temperature protection, and self diagnostic function.

The system can automatically adjust the maximum output current of the equipment according to the operating temperature, without overloading causing equipment damage.

C-SVG has minimal self loss and basically does not require maintenance. Due to the absence of resonance overvoltage issues, its service life is over ten years (MTBF greater than 100000 hours)

Through the coupling effect of transformers, it can be applied to 6-10kV systems, expanding the application range of voltage levels.

The display interface adopts a 7-inch industrial grade touch screen, which is easy and convenient to operate; The display interface can display real-time parameters such as voltage and current; The menu settings are flexible, and the current transformer ratio and polarity can be set through software. The target power factor and output current size can be set as needed, and real-time fault records and event records can be queried and stored.

No need for complex power grid analysis, simple design and selection, easy installation and operation, flexible incoming method, can choose top incoming method or bottom incoming method.

Considering the harsh industrial environment requirements, all components have been rigorously screened, and core components have been purchased from internationally renowned manufacturers. The electromagnetic compatibility design and redundant protection measures have been improved to ensure that the device can operate stably for a long time.

Multiple machines can work in parallel, and the compensation capacity can be flexibly expanded according to user needs.

Adopting a universal communication protocol, the communication interfaces are RS232, RS485, MODBUS, USB or Ethernet ports.

Application field

C-SVG static reactive power generators have been widely used in various industries such as industrial and mining enterprises, coal, ships, metallurgy, subways, rail transit, wind power, infrastructure, oil and gas extraction, telecommunications, airports and ports, large-scale logistics facilities, and data centers.