Xiangyang Yuanchuang Industrial Control Co

Product name
High voltage dynamic reactive power compensation cabinet
Specifications and models
Manufacturer
Xiangyang Yuanchuang Industrial Control Co., Ltd.
Production address
Fancheng, Xiangyang City, Hubei Province District Houjiawa Industrial Park No.
High-voltage dynamic reactive power compensation device
Ordering instructions
Subordinate materials are required for ordering
Motor model rated power rated voltage rated current stator connection (/△ ) Whether the star point can be opened
Cabinet surface color requirements
Power grid status, drag load conditions
Communication interface requirements
If you have special requirements, please consult with our company.
Product Description
Related Knowledge
High-voltage dynamic reactive power compensation device compensation is divided into two methods: system compensation and load compensation. Among them, system compensation is mainly aimed at the transmission and distribution grid, regulating the grid voltage and improving power quality. Load compensation is mainly aimed at compensating the reactive power of power user terminals and improving the user's power factor.
The technology adopts a new generation of power electronic components, using AC, DC, and AC methods, plus configured phase-shifting transformers, and modern computer control technology to achieve dynamic calculation control and compensation. The device has low output harmonic content and high response speed. It is fast and reliable and is completely different from traditional fixed capacitor compensation and thyristor controlled compensation devices.
The product is technologically advanced and represents the latest technology in the field of reactive power compensation. It is an important part of the flexible AC transmission system.
It does not save active power per se, but by compensating for reactive power, it mainly improves the power factor for user loads and reduces the huge fines that customers need to pay due to low power factor (power rate electricity charges) while increasing the output of power equipment for electricity. The main purpose of the system is to reduce line losses and stabilize the grid voltage.
After the device is used, a large number of capacitors and inductors used originally can be removed, and dynamic compensation is directly used.
The device uses computer tracking technology to control and eliminate electrical current. A large number of harmonics on the network can reduce the harmonic content injected into the power grid to meet the national standard requirements.
The user's original and fixed capacitors can also be retained or removed depending on the future on-site technology upgrade.
Two product introduction< br/> Our company's products adopt a reactive current detection method based on instantaneous reactive power theory. The inverter main circuit adopts a bridge power unit cascade topology, supplemented by small-capacity energy storage components. It consists of several levels The steps synthesize a step wave to approximate the sinusoidal output voltage. Due to the increase in the number of output voltage levels, this inverter makes the output waveform have a better harmonic spectrum, and each switching device is subjected to less voltage stress and does not require The voltage equalization circuit can avoid various problems caused by large /. Therefore, this inverter can be called a perfect harmonic-free converter.
Working Principle
The basic principle is to use the shut-off High-power power electronic devices (such as) form a self-commutated bridge circuit and are connected in parallel to the power grid through a reactor. By appropriately adjusting the amplitude and phase of the AC side output voltage of the bridge circuit, or directly controlling its AC side current, you can Make the circuit absorb or emit reactive current that meets the requirements to achieve the purpose of dynamic reactive power compensation.
Main functions
Maintain the voltage of the receiving end and enhance the stability of the system voltage
Compensate the reactive power of the system power, improve power factor, reduce line loss, save energy and reduce consumption
Suppress voltage fluctuations and flickers
Suppress three-phase imbalance.
Product Features
High reliability and easy operation Performance is the design goal to meet users' urgent need to improve the power factor of the distribution network. It adopts new power devices and fully digital microcomputer control, which has the following characteristics
Easy installation, setting and debugging
Real-time tracking of load changes, Dynamically compensate for reactive power and improve the system power factor
Use optical fiber triggering technology to achieve electrical isolation between the primary system and the secondary system, solve the interference problem, and achieve high reliability and controllability
The main circuit is composed of The bridge power unit is cascaded as the inverter main circuit structure. The output is superimposed by stepped sinusoidal waveforms with good sinusoidality
Modular design of the power circuit, simple maintenance and good interchangeability
Dynamic Fast response time
Real-time tracking of grid current changes, dynamic stepless compensation of grid reactive power
No transient impact, no closing inrush, no arc re-ignition during switching, no need to discharge Re-investment
Complete protection functions, including overvoltage, undervoltage, overcurrent, overheating and other protections, high operational reliability
Small maintenance and low operating costs
The controller is fully digital and has a friendly human-machine interface display, and has network communication function
The controller has high reliability and is simple to operate. When connecting to the system, there is no need to consider the phase sequence of the AC system, and the compensation device has complete protection measures
The circuit parameters of the device are carefully designed. The heat generation is small, the equipment structure is compact, and the floor space is small
The control power supply adopts a separate power supply method for the device after passing through, and the control power supply is powered off to maintain normal operation
Improve voltage quality, stabilize system voltage, and suppress voltage Flicker
Can be installed in parallel and can easily expand capacity.
Technical parameters
Rated capacity~
Rated voltage~~
System frequency
Response time
Loss
Output current
Reactive power Adjustment method, capacitance and inductance are continuously adjustable
Protection level or customized according to user needs
Application fields
The products developed by our company are widely used in petrochemical industry, metallurgy, electric power, coal, electrification, railway, wind power plant and other places with or near In the industrial field of impact loads and large-capacity motors, they can play an important role in saving energy and reducing consumption, improving grid security and stability, improving grid power factor, and improving power quality.
Three product application field cases
/ The reactive power compensation device is operating stably in the Xiejiaji No. 1 Coal Mine, Huainan City, Anhui Province.
/Dynamic reactive power compensation has been successfully applied in two substations of Tashan Guanqiao affiliated to Sichuan Hydropower Investment and Operation Group Yongan Electric Power Co., Ltd.
After the above-mentioned units installed the company's reactive power compensation device, it not only improved the power factor of the power grid from low to high, but also solved the problem of overcompensation of the existing capacitor compensation device, effectively reduced line losses and improved the quality of the power grid. Saving electricity bills for users has very significant social and economic benefits.
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