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The fast anti-harmonic intelligent power capacitor is designed for the situation where the harmonic content of the power network is large, the reactive power changes rapidly, and ordinary power capacitors cannot operate normally. It uses special technologies and processes and is composed of a circuit breaker, a thyristor, a reactor, and an aluminum-shell low-voltage power capacitor. It has the characteristics of fast response speed, zero-crossing switching of the capacitor, no inrush current impact, effectively prolonging the service life of the capacitor, no amplification effect on harmonics, and the ability to absorb some harmonics.
The transmitter amplifies the weak electrical signals collected by the sensor for transmission or to activate control elements. Or it converts the non-electrical quantity input by the sensor into an electrical signal and amplifies it at the same time to provide a signal source for remote measurement and control. It can also convert analog quantities into digital quantities as needed. The sensor and the transmitter together form the monitoring signal source for automatic control.
The air-type time relay in this series of products is mainly composed of three parts: an electromagnetic system, contacts, and an air chamber. This series of products achieves different time-delay actions of the relay by adjusting the size of the airflow entering the working air chamber. It has a simple structure and can be easily made into a power-on delay or power-off delay. It is not affected by various electromagnetic or high-frequency interferences from the external circuit itself. The disadvantage is that it is easily affected by the external environmental temperature, cleanliness, etc., and the time-delay accuracy is relatively low. The dial indicating the setting time is clear. Street lamp automatic control switch in this system.Intelligent Reactive Power CompensationCapacitoris an intelligent reactive power compensation device for the 0.4kV low-voltage distribution network to reduce line losses, improve the power factor, improve power quality, and save energy and reduce consumption. Based on theIntelligent Reactive Power CompensationControllerThe designed reactive power compensation scheme can refer to the following principles
| Non-linear load ratio | Reactive power compensation design scheme | | | |
| Three-phase balanced static load | Three-phase unbalanced static load | Three-phase balanced frequently changing load | Three-phase unbalanced frequently changing load | |
| Non-linear equipment in the load ≤ 15% of transformer capacity (mainly linear load) | Three-phase common compensation, zero-crossing switching of composite switch | Phase-separated compensation or mixed compensation Zero-crossing switching of composite switch; | Three-phase common compensation, dynamic switching of thyristor switch | Phase-separated compensation or mixed compensation Dynamic switching of thyristor switch; |
| 15% | Three-phase common compensation Zero-crossing switching of composite switch Connect 6% or 12% filtering reactance in series in the capacitor circuit | Phase-separated compensation or mixed compensation Zero-crossing switching of composite switch Connect 6% or 12% non-tuned filtering reactance in series in the capacitor circuit | Three-phase common compensation Dynamic switching of thyristor switch Connect 6% or 12% non-tuned filtering reactance in series in the capacitor circuit | Phase-separated compensation or mixed compensation Dynamic switching of thyristor switch Connect 6% or 12% non-tuned filtering reactance in series in the capacitor circuit |
| Harmonic governance target | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system |
| The ratio of non-linear equipment in the load > 50% of the transformer capacity (there are a large number of harmonics) | Three-phase common compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactor | Phase-separated compensation or hybrid compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactor | Three-phase common compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactor | Phase-separated compensation or hybrid compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactor |
Since the EKN2 type gas-insulated switchgear adopts the non-sulfur hexafluoride (nitrogen) insulation technology, it not only realizes environmental protection, but also is especially suitable for use in harsh climates or environments such as polluted and humid areas, and can also be used in high-cold areas above 1000m. The low-voltage draw-out switchgear (hereinafter referred to as the switchgear) is developed by Shaanxi Fuyou Electrical Equipment Technology Development Co., Ltd. after comprehensive improvement based on the MNS series low-voltage switchgear of ABB Company of Switzerland. It is currently a relatively advanced low-voltage draw-out switchgear in China. Example: R118 - The 18th resistor on the main board circuit. 1. The first English letter or combination represents the name of the component, which is the code of the component. 2. The following number represents different modules on the circuit board. Generally speaking: 1 - Main board circuit, 2 - Power supply circuit, 3 - Feedback circuit, etc. These can be determined independently by the designer. 3. The subsequent number represents the serial number of the same type of components on this functional module. That is: the 18th resistor, etc. Commonly used codes for electronic circuit components. R - Resistor. VR - Adjustable resistor. C - Capacitor. D - Diode. ZD - Zener diode.
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