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Help CenterPrinciple of Dongying Active Filter Component Pqca-380-100-200fc3
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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 technology and processes and is composed of a circuit breaker, thyristor, reactor, and low-voltage aluminum-shell power capacitor. It has the characteristics of fast response speed, zero-crossing switching of the capacitor, no inrush current impact, effectively extending the service life of the capacitor, no amplification effect on harmonics, and the ability to absorb some harmonics.
3.2 Principle of Heat Substation RTU Control The system uses control to connect the RTUs of each heat substation through the network. On the basis of the unified monitoring system, the average temperature of the supply and return water being consistent with each other is set as the adjustment target. The RTUs of each heat substation will measure the supply and return water temperatures, calculate the average temperature value of the supply and return water after uniform adjustment, and send this value to the RTUs of each heat substation as the set value for specific adjustment.
The fan uses a high-performance, low-noise centrifugal fan, which has the advantages of large air volume, high static pressure, low noise, and stable operation. The heat exchanger is processed by our factory's imported American OAK production line, which greatly improves the heat exchange efficiency of the heat exchanger. The shell is processed by the equipment imported by our factory to ensure the appearance quality. The frame uses the popular aluminum alloy frame structure, and the overall structure is compact, beautiful, and generous.Intelligent Reactive Power CompensationCapacitoris an intelligent reactive power compensation device for the 0.4kV low-voltage distribution network to reduce line loss, improve power factor, improve power quality, and save energy. Based on the intelligentReactive Power CompensationControllerThe reactive power compensation scheme designed 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 Series 6% or 12% filtering reactance in the capacitor circuit | Phase-separated compensation or mixed compensation Zero-crossing switching of composite switch Series 6% or 12% non-tuned filtering reactance in the capacitor circuit | Three-phase common compensation Dynamic switching of thyristor switch Series 6% or 12% non-tuned filtering reactance in the capacitor circuit | Phase-separated compensation or mixed compensation Dynamic switching of thyristor switch Series 6% or 12% non-tuned filtering reactance 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 above harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and above harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and above harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and above harmonics in the system |
| The ratio of non-linear equipment in the load > 50% of the transformer capacity (a large number of harmonics exist) | Three-phase common compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactance | Phase-separated compensation or mixed compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactance | Three-phase common compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactance | Phase-separated compensation or mixed compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactance |
Network power meters are designed for the power needs of power systems, industrial and mining enterprises, public facilities, and intelligent buildings. Dear customers: Hello, Shaanxi Fuyou Electrical Equipment Technology Development Co., Ltd. is a high-quality group with strong technical strength, providing high-quality products and complete solutions for users. The main products include single-phase rail meters, three-phase rail meters, etc. The installation diagram of the double float switch is as follows: In the above figure, A is the upper limit of the double float switch in the water tank, B is the lower limit, and the controlled liquid level range is the height difference between the AB limits. The double float switch has four leads, two red wires and two black wires. Any one red wire and one black wire are connected as a combined wire. These three wires control a small water pump through a small relay. The circuit schematic diagram is as follows: In the above figure, 6# and 10#, 7# and 11#, 8# and 12# are the normally open contacts of the relay, 13# and 14# are the coil contacts of the relay, and A and B are the upper and lower limit switches of the double float respectively. This circuit only works when the water level drops to the limit.
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