Application Of Medium Voltage Variable Frequency Drive For Water Pump
At present, energy saving water pump in the high and low pressure areas are involved, 380V, 3KV, 6KV and 10KV are used, the industry covers petrochemical, mining, cement, electricity, chemical industry, papermaking, petroleum, food, medicine, city politics, architecture, water conservancy and...Send Inquiry
At present, energy saving water pump in the high and low pressure areas are involved, 380V, 3KV, 6KV and 10KV are used, the industry covers petrochemical, mining, cement, electricity, chemical industry, papermaking, petroleum, food, medicine, city politics, architecture, water conservancy and many other fields related to the national economy and the people's livelihood.
Types and varieties of pumps. According to its use, it can be roughly divided into centrifugal pump, metering pump, screw pump, reciprocating pump, water turbine pump, submersible pump, oil pump, clean water pump, pressure test pump, vortex pump, low temperature pump, vacuum pump, roots pump, molecular pump,Gear pump, mud pump, corrosion resistant pumps, deep well pump, water pump, mixed flow pump, axial flow pump, boiler feedwater pump, liquid pump, injection pump, chemical pump, pump plugging and no leakage pump, plastic pump, fire pump and so on.
Generally speaking, high and low voltage variable frequency pumps are commonly used as follows:
Thermal power generation:
Feed water pump, condensate pump, circulating pump, slurry pump, sewage pump
Mining and metallurgy:
Mud pump, descaling pump, centrifugal feed pump,
The main pipeline pump, injection pump, circulating water pump, boiler feedwater pump, electric submersible pump, brine pump, descaling pump
Water supply and wastewater treatment:
Sewage pump, purification pump, clean water pump
Beater and water pump
1.Integrated design, simple installation and debugging
2. Without changing the original motor, the power frequency switching can be realized
3. No additional circuit such as step-up transformer, input filter, output filter, reactor, power factor compensation device and snubber circuit is needed
4. Harmonic pollution is very small, no electromagnetic interference to the surrounding equipment
5. High power factor and high efficiency
6. All kinds of protection are perfect, the operation is simple, the operation is stable and reliable
Frequency convertion reconstruction can achieve effect:
1. saving, greatly reduce operating costs
2. realize speed control, the operator can freely control according to the actual needs
3. reduce the impact on power. After adopting frequency conversion adjustment, the system realizes soft start, has no big impact on the power grid and transformer, reduces the mechanical damage of the starting mechanical torque to the motor, prolongs the service life of the motor.
To reduce the amount of maintenance. Due to the slow start and the decrease of the speed, the life of many parts, especially the sealing and bearing, is prolonged correspondingly.
4. can effectively solve the fan / pump "surge", extend the maintenance cycle, saving maintenance costs.
1: the system has automatic switching function of power frequency and frequency conversion. Once a fault occurs in the frequency conversion system, it can automatically switch to the power frequency file, turn the inverter system out, and ensure the operation of the pump during the maintenance of the frequency conversion system, so as to meet the needs of the power plant production.
2: the operating frequency of the system can be adjusted by open loop / closed loop. It can also set and adjust the parameters of the frequency conversion system artificially under different working conditions, which can reduce the initial investment and ensure the safe and smooth operation of the pipe network system.
3: site setting, start and stop, emergency stop button and the control room for the real-time display of operation parameters of a PC, which greatly facilitates the site operation personnel and the operation of the equipment running status monitoring.
4: optimize the protection parameters of the system to ensure the continuous and smooth operation of the pipe network system. Avoid the shutdown of the pump due to the protection of the frequency conversion system is too sensitive, and affect the safe and smooth operation of the power generation system.
5: in the frequency conversion speed control system to set suitable for the actual alarm function, and the operation parameters, operation, fault conditions with detailed recording function.
1. one by one automatic bypass
2. one by one manual bypass
3. one and two automatic bypass
4. side drive bypass