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Passive filter compensation device for HYFC-ZJ series rolling mill
The harmonics generated in cold rolling, hot rolling, aluminum oxidation, and electrophoresis production are very serious. Under a large number of harmonics, the cable (motor) insulation attenuates rapidly, the loss increases, the output efficiency of the motor decreases, and the capacity of the transformer decreases; when the input power is caused by the user When the waveform distortion caused by harmonics exceeds the national limit value, the electricity consumption rate increases and the power supply may be terminated. Therefore, no matter from the perspective of equipment, the impact on power supply, or the interests of users themselves, the harmonics of electricity consumption should be handled well and the power factor of electricity consumption should be improved.
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HYFC series high voltage passive filter compensation device
Non-linear loads in industries such as steel, petrochemical, metallurgy, coal, and printing and dyeing generate a large number of harmonics during work, and the power factor is low, causing serious pollution to the power system and affecting the quality of power supply. The high-voltage passive filter compensation complete set is mainly composed of filter capacitors, filter reactors and high-pass resistors to form a single-tuned or high-pass filter channel, which has a good filtering effect on specific harmonics and harmonics above specific orders. At the same time, reactive power compensation is performed on the system to improve the power factor of the system, improve the voltage stability of the system, and ensure the safety and reliability of the power supply system. Because of its economy and practicality, simple structure, reliable operation and convenient maintenance, it has been widely used in high-voltage systems.
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HYMSVC series high voltage reactive power dynamic filter compensation device
The three major indicators of power system voltage, reactive power and harmonics are crucial to improving the economic benefits of the entire network and improving the quality of power supply. At present, the adjustment methods of traditional group switching capacitor compensation devices and fixed capacitor bank compensation devices in China are discrete, and cannot achieve ideal compensation effects; at the same time, the inrush current and overvoltage caused by switching capacitor banks have a negative It will cause harm in itself; existing dynamic reactive power compensation devices, such as phase-controlled reactors (TCR type SVC), are not only expensive, but also have the disadvantages of large floor area, complex structure, and large maintenance. Magnetically controlled reactor type dynamic reactive power compensation device (referred to as MCR type SVC), the device has significant advantages such as small output harmonic content, low power consumption, maintenance-free, simple structure, high reliability, low price, and small footprint It is the ideal dynamic reactive power compensation device in China at present.
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HYPCS high-voltage cascaded energy storage grid-connected products
Features
- ●High protection grade IP54, strong adaptability
- ●Integrated design, easy to install and maintain
- ●Straight-mounted design, high efficiency of the whole machine
- ●Automatic redundant design, high reliability
- ●Support multi-machine parallel connection, can be quickly expanded to several +MW levels
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FDBL special energy storage equipment for rail transit
Features
- ●Reactive power compensation function
- ●Phase sequence automatic detection technology
- ●Redundant design, high stability
- ●Modular structure, intelligent operation and maintenance
- ●Full digital control technology, optical fiber communication
- ●Controllable rectification and feedback integrated machine design
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Outdoor Energy Storage Converter
Features
- ●Droop control technology
- ●Rapid island detection technology
- ●High and low voltage ride through function
- ●Support multi-machine parallel connection, easy to expand
- ●Reactive power compensation and harmonic compensation function
- ●High protection grade IP54, strong adaptability
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Non-isolated three-phase energy storage converter
Features
- ●Rapid island detection technology
- ●High and low voltage ride through function
- ●The single machine has the function of peak shaving and valley filling
- ●Reactive power compensation and harmonic compensation function
- ●With constant power, constant current charge and discharge function
- ●Support multi-machine parallel connection, expandable to MW level
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HYPCS series isolated three-phase energy storage converter
Features
- ●Coordination function of wind, diesel and storage
- ●Rapid island detection technology
- ●The system is completely isolated from the power grid
- ●Reactive power compensation and harmonic compensation function
- ●With constant power, constant current charge and discharge function
- ●On-grid and off-grid can realize zero switching (need to configure thyristor)
- ●Divided charge and discharge function, which can be configured according to the needs of the site
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Parallel resistance device
The parallel resistance device is a set of resistance cabinet comprehensive line selection device installed in parallel with the neutral point of the system and connected with the arc suppression coil. More effective and accurate selection of fault lines. In the arc-suppressing coil system, the parallel resistance integrated line selection device can be used to achieve 100% line selection accuracy. The parallel resistance device, or the parallel resistance cabinet, is composed of grounding resistors, high-voltage vacuum connectors, current transformers, current signal acquisition and conversion systems, resistance switching control systems, and supporting dedicated line selection systems.
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Generator neutral point grounding resistance cabinet
The neutral point grounding resistance cabinet of Hongyan generator is installed between the neutral point of the generator and the ground. During the operation of the generator, single-phase grounding is the most common fault, and the fault point will further expand when arcing is grounded. Stator winding insulation damage or even iron core burns and sintering. Internationally, for single-phase ground faults in generator systems, high-resistance grounding at the neutral point of generators is widely used to limit ground current and prevent various overvoltage hazards. The neutral point can be grounded through a resistor to limit the fault current to an appropriate value, improve the sensitivity of the relay protection and act on tripping; at the same time, only local slight burns may occur at the fault point, and the transient overvoltage is limited to the normal line voltage. 2.6 times of the neutral point voltage, which limits the re-ignition of the arc; prevents the arc gap overvoltage from damaging the main equipment; at the same time, it can effectively prevent the ferromagnetic resonance overvoltage, thereby ensuring the safe operation of the generator.
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Transformer neutral point grounding resistance cabinet
In the 6-35KV AC power grid of my country’s power system, there are ungrounded neutral points, grounded through arc suppression coils, high-resistance grounded, and small-resistance grounded. In the power system (especially the urban network power supply system with cables as the main transmission lines), the ground capacitive current is large, which may make the occurrence of “intermittent” arc ground overvoltage have specific “critical” conditions, resulting in arcing The application of the neutral point resistance grounding method for the generation of grounding overvoltage forms a discharge channel for the energy (charge) in the grid-to-ground capacitance, and injects resistive current into the fault point, making the grounding fault current take on a resistance-capacitance nature, reducing and The phase angle difference of the voltage reduces the re-ignition rate after the current at the fault point crosses zero and breaks the “critical” condition of the arc overvoltage, so that the overvoltage is limited within 2.6 times of the phase voltage, and at the same time guarantees high-sensitivity ground fault protection The equipment accurately determines and cuts off the primary and secondary faults of the feeder, thus effectively protecting the normal operation of the system.
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Grounding resistance cabinet
With the rapid development of urban and rural power grids, great changes have taken place in the power grid structure, and a distribution network dominated by cables has appeared. The ground capacitance current has increased sharply. When a single-phase ground fault occurs in the system, there are fewer and fewer recoverable faults. The use of resistance grounding method not only adapts to the main development and change requirements of my country’s power grid, but also reduces the insulation level of power transmission equipment by one or two grades, reducing the investment of the overall power grid. Cut off the fault, suppress the resonance overvoltage, and improve the safety and reliability of the power system.
