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Four-quadrant reactive power compensation controller for photovoltaic systems
The MCGD‑G can monitor reactive power and voltage fluctuations in the grid in real time. By adjusting the reactive power output of the photovoltaic system, it achieves reactive power compensation, thereby enhancing grid stability and power quality. At the same time, it intelligently regulates the active power output of the photovoltaic system based on solar irradiance conditions and grid demand, enabling maximum power point tracking and optimized energy utilization.
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The DKGD intelligent dynamic regulator differs from conventional electronic zero-crossing composite switches. It employs the latest zero-crossing comparison technology: it turns on at the voltage zero‑crossing and turns off at the current zero‑crossing, resulting in extremely low inrush currents and no arcing during capacitor switching. Its design is simplified, installation is straightforward, and it boasts a long service life. With a low resistance (＜2 mΩ) and minimal operating power consumption (＜5 W), the entire switch remains cool even under prolonged operation, eliminating the need for an additional cooling fan. It is thus a highly ideal electronic switch for switching power capacitors.
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The MCGD reactive power compensation controller is suitable for both high- and low-voltage distribution systems and operates based on reactive power. It employs a high-performance microcontroller, features a digital design, and includes an RS485 communication interface; the power quality data it acquires can be transmitted to external devices via this interface. The product offers protection functions for common‑phase compensation, overvoltage, undervoltage, harmonics, and overheating. With switching strategies that include cyclic, linear, and fast modes, it provides automatic, precise compensation control, thereby improving the system’s power factor and enhancing power quality.
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High-Power Intelligent Thyristor Power Switch
The HP‑TKGD high‑power intelligent thyristor power module is an electronic power device specifically designed for the dynamic, rapid switching of 0.75 kV power capacitors. The product comprises high‑power thyristors, a triggering circuit, protection circuits, and a heat‑dissipation system. Its main circuit employs anti‑parallel thyristor modules and supports multiple control schemes, including level‑based and pulse‑triggered modes. It is ideally suited for applications with impact loads that require fast capacitor switching, such as medium‑frequency furnaces, rolling mills, arc welders, steel‑rolling lines, and port‑side overhead cranes—environments where load conditions change rapidly.
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The TKGD intelligent thyristor power module is an electronic power device designed for the dynamic, rapid switching of 0.4 kV power capacitors. The product comprises high‑power thyristors, a triggering circuit, protection circuits, and a heat‑dissipation system. It features high‑speed CPU‑based measurement and control, pulse‑transformer triggering, and a proprietary fast‑switching technology, making it well suited for applications with inductive loads that require rapid capacitor switching on site.
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The RKGD series reactive‑capacitive components consist of series reactors and filtering capacitors, and are primarily used in 50 Hz or 60 Hz power systems to improve the power factor, reduce reactive power losses, suppress system harmonics, and enhance voltage quality.
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The CKGD series reactors are connected in series with the compensation capacitor circuit, where they help suppress switching inrush currents and, importantly, mitigate harmonics to prevent resonance. The cores are made of high‑quality, low‑loss cold‑rolled steel, while the windings use high‑temperature‑rated enameled wire. These reactors deliver excellent electrical performance, featuring low losses, strong harmonic suppression, and quiet operation.
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The MPGD series capacitors combine the superior qualities of low‑voltage self‑healing types, manufactured using high‑grade base materials and advanced production processes. They are primarily used in 50 Hz or 60 Hz power systems to improve the power factor, reduce reactive power losses, and enhance voltage quality. Featuring an aluminum housing that resists corrosion and offers excellent heat dissipation, these capacitors incorporate an overvoltage‑activated internal safety disconnect device, ensuring safe and reliable operation while maintaining outstanding, stable electrical performance.
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Guangdong Guangda Electric Co. Ltd.
Tel：18028173868
E-mail：gdgddq@126.com
Web：www.gd96.com
Add ：Building 3, No. 613, Xingtan Shuixiang Avenue, Gaozan Village, Xingtan Town, Shunde District, Foshan City, Guangdong Province