PRODUCT INTRODUCTION:
WT-CXDW dynamic reactive power compensation device is a kind of equipment for reactive power compensation of specific power grid. Through reactive power compensation, it can improve the power quality, reduce the line loss, increase the output of transformer, extend the service life of production equipment, improve the power factor, avoid the waste of electric energy, save the electricity fee and improve the economic benefits of enterprises.
This product can be widely used in metallurgical smelting, tire manufacturing, cement products, plastic packaging, steel rolling and copper rolling, coal mining and other industries in which reactive power compensation is required in low-voltage environment.
WT-CXDW dynamic reactive power compensation device adopts LC circuit and thyristor as the solid-state switch of capacitor switching. It has the characteristics of anti harmonic, non-contact, no noise, no inrush current, no overvoltage and fast response.
MODEL DESCRIPTION:
MODEL REFERENCE TABLE:
| Equipment Model |
W-CXDW-0.4-160 |
W-CXDW-0.4-240 |
W-CXDW-0.4-360 |
W-CXDW-0.4-400 |
W-CXDW-0.4-450 |
| System Voltage |
400V |
400V |
400V |
400V |
400V |
| Compensation Capacity |
160KVA |
240KVA |
360KVA |
400KVA |
450KVA |
| Control Series |
8 |
8 |
6 |
5 |
5 |
Capacity
Per Step |
20KVA |
30KVA |
60KVA |
80KVA |
90KVA |
| Installed Capacity |
276KVA |
413KVA |
517KVA |
689KVA |
775KVA |
| Capacitance Voltage |
525V |
525V |
525V |
525V |
525V |
| Series Reactance Coefficient |
6% |
6% |
6% |
6% |
6% |
| Parallel Cabinet |
1 |
1 |
1 |
1 |
1 |
| Equipment Model |
W-CXDW-0.66-240 |
W-CXDW-0.66-360 |
W-CXDW-0.69-240 |
W-CXDW-0.69-360 |
| System Voltage |
660V |
660V |
690V |
690V |
| Compensation Capacity |
240KVA |
320KVA |
240KVA |
320KVA |
| Control Series |
3 |
4 |
3 |
4 |
| Capacity Per Step |
80KVA |
80KVA |
80KVA |
80KVA |
| Installed Capacity |
720KVA |
960KVA |
720KVA |
960KVA |
| Capacitance Voltage |
660V |
660V |
690V |
690V |
| Series Reactance Coefficient |
6% |
6% |
6% |
6% |
| Parallel Cabinet |
1 |
1 |
1 |
1 |
The filter compensation device of the above scheme can be specially designed
according to the actual situation of the system according to the user's requirements
MAIN TECHNICAL INDICATORS:
1. The minimum response time is 20ms;
2. For the fifth harmonic, the absorptivity is more than or equal to 20%;
3. Power factor increased to above 0.92 (under the premise of sufficient compensation capacity)
4. During the compensation process, the grid voltage fluctuation meets the requirements of national standard gb12326-90;
5. There is no inrush and vibration when switching;
6. It has over-current, over-voltage, overheating, grounding and other protection functions;
7. Long term operation under 1.1un and 1.3in is allowed;
8. Sampling physical quantity: reactive power;
9. Display: power factor PF, u, I, s, Q, P and other 11 parameters;
10. Operation mode: automatic, continuous operation.
USAGE ENVIRONMENT:
1. Ambient air temperature: maximum 40 ºC (24 hours average no more than 35 ºC);the minimum temperature difference is - 25 ºC; the maximum daily temperature difference is 25K; note: it is allowed to store and transport at 35 ºC
2. Humidity: the average value of daily relative humidity shall not be greater than 95%; the average value of monthly relative humidity shall not be greater than 90%
3. Altitude: no higher than 2000m
4. Pollution level: Grade III
5. Strong harmonic environment conditions (voltage total harmonic distortion rate 10% - 15%, current total distortion rate above 30%)
APPLICATION:
1. Reactive power compensation for unstable load
The factory uses a large number of electrical equipment, and the reactive power loss changes greatly and is unstable, such as extruders and injection molding machines used in plastic factories, as well as elevators, stamping machines, elevators, crushers, welding machines, mine conveyor belts in other industries. The load has fast or extremely fast reactive power changes, such as the auto manufacturer, motorcycle manufacturer and other spot welding machines, seam welding machines, welding machines reactive power compensation. The load of spot welding machine in automobile manufacturing plant changes very quickly, and leads to a large number of reactive power. The decrease of total voltage will lead to poor quality of welding and affect the production efficiency of welding. Stable current can improve welding quality and eliminate flicker, make full use of existing equipment and reduce basic cost.
2. Centralized compensation of starting current of a large number of motors
The current consumption during the cage motor startup is 6-7 times of normal operation, and the starting current is mostly reactive component. The conventional contactor system can not compensate for the voltage drop, and cxdw compensation system can follow the reactive current, compensate and reduce it to the range that meets the requirements. Through the best capacity input in the power grid, the system can provide real-time and appropriate reactive power quickly, and protect the power consumption equipment. In many cases, the use of dynamic compensation products replaces the original step-down start or motor soft starter.
3. Reactive compensation of steel plant and port equipment
In the rolling mill, port bridge crane and crane, a large number of reactive power is needed during the working period. The active power loss (PCU) caused by high reactive current can cause obvious voltage drop on the high and low voltage side of transformer, especially in rolling and lifting and lowering of rolling mill and crane. For the situation that the power factor is low and the large inductive load changes and affects the normal operation of other equipment, the "20ms is used to complete all reactive compensation, stabilize the voltage dynamically, improve the load capacity, eliminate the voltage flicker fluctuation, effectively suppress the harmonic, and the temperature of the rectifier transformer is greatly reduced, and the power saving effect is very significant and the economic benefit is very considerable.
Basic principles of reactive power compensation:
Reactive power compensation can be divided into centralized compensation, decentralized compensation and random follower compensation.
The following principles should be followed: comprehensive planning, reasonable layout, graded compensation and local balance; combination of centralized compensation and decentralized compensation, mainly decentralized compensation; combination of high-voltage compensation and low-voltage compensation, mainly low-voltage compensation; combination of voltage regulation and loss reduction, with loss reduction as the main principle
Working principle of reactive power compensation:
The output power of power grid includes two parts: active power and reactive power. Direct consumption of electrical energy, electrical energy into mechanical energy, thermal energy, chemical energy or acoustic energy, use these energy to do work, this part of the power is called active power. It does not consume electric energy, but converts electrical energy into another form of energy. However, this energy is a necessary condition for electrical equipment to do work, and this kind of energy is periodically converted with electric energy in the power grid. This part of power is called reactive power. When the current is working in the inductor, the current is 90 ° ahead of the voltage, while the current is 90 ° behind the voltage when the current is working in the capacitor element. In the same circuit, the direction of inductance current and capacitance current is opposite, and the difference is 180 degrees. If the capacitance components are installed in proportion in the electromagnetic component circuit, the current of the two will be offset each other, and the angle between the current vector and the voltage vector will be reduced, so as to improve the ability of electric energy to work. This is the principle of reactive power compensation.
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