SVG Type Three-Phase Unbalance Compensation Device
Short Description:
Our company's newly launched outdoor pole-mounted KRSVG responds to our company's initiatives of the "Special Investigation and Rectification of Low Voltage Issues" and the "Technical Principles for Low-Voltage Distribution Network Management". It can effectively address key issues in distribution network upgrades such as three-phase imbalance, low end-point voltage, bidirectional compensation reactive current, and harmonic pollution; it improves voltage quality in real time, raises end-point voltage, enhances distribution quality, improves the power usage environment, solves three-phase imbalance issues, significantly reduces losses in low-voltage distribution lines and transformers, extends transformer lifespan, balances reactive power locally, improves power factor, increases distribution network output capacity, and resolves harmonic pollution caused by nonlinear loads.
Product details
Product Overview:
Our company's newly launched outdoor column KRSVG responds to the "Special Investigation and Governance of Low Voltage Problems" and the "Notice of Technical Principles for Distribution Network Low Voltage Governance" proposed by our company, which can effectively treat key problems such as three-phase imbalance, low terminal voltage, bidirectional compensation of reactive current and harmonic pollution in the transformation and upgrading of distribution network. Real-time voltage quality improvement. Raise the terminal voltage, improve the power distribution quality, improve the power consumption environment, solve the problem of three-phase imbalance, greatly reduce the loss of low-voltage distribution network lines and transformers, and extend the life of transformers. Make the reactive power achieve local balance, increase the power factor and increase the output capacity of the distribution network; Addresses harmonic contamination caused by nonlinear loads.
Function
Compensates for current imbalances in the distribution network
Compensate for the midline current in the distribution network
compensate for the capacitive or perceptual reactive power of the system
harmonics in the compensation system
Close-range wireless monitoring handheld terminal with WIFI technology
Optional remote G RS background monitoring system
And there is a power grid phase sequence adaptive function, and the phase line connection can be in any order.
Functional features:
1. The device uses the sampling circuit to collect the three-phase voltage, three-phase current and other operating parameters of the low-voltage distribution line in real time, calculates the unbalanced load between the three phases and the current to be compensated through model operation, and controls the PWM signal generator to send a control signal to the internal IGBT according to the value set by the device, so that the inverter can generate a current signal that meets the requirements. The three-phase load balance adjustment device can analyze the load imbalance between the three phases according to the AC sampling of the sampling circuit at the moment of power-on, and the DSP calculates the current value and phase to be compensated, and the signal generator sends a PWM signal to the IGBT drive, and the inverter generates a current signal that meets the requirements and sends it to the system to realize the automatic adjustment of the three-phase load balance.
2. The device can use the remaining device capacity after adjusting the three-phase imbalance to achieve inductive and capacitive two-way dynamic reactive power tracking compensation. The device can detect the load current in real time, and analyze the reactive power content of the load current through DSP calculation, and then control the PWM signal generator to output the PWM signal to the IGBT drive circuit according to the set compensation range, so that the inverter can generate a reactive current access system that is equal to the size of the reactive power component of the system and in the opposite direction, so as to achieve the purpose of real-time dynamic tracking and compensation of reactive power. It can realize bidirectional fine compensation of power factor, and the compensation capacity is -30~+30kVar. The average power factor after compensation is close to 1;
3. The device has a Chinese LCD display and a man-machine interface with operation keys, with overload protection function, and automatic current limit at 100% rated output. When the reactive power demand in the system exceeds the rated output capacity of the device for a long time, the device can compensate for the reactive power within its rated capacity to the limit and maintain normal operation without overload burnout and other failures.
4. The device has RS485 interface and modbus standard interface protocol to facilitate users to access equipment operating status, measurement data and fault alarm information to the monitoring system. The device can be connected to the power quality monitoring system through the communication interface to realize the monitoring of the three-phase load balance adjustment device, including: parameter calling, parameter modification, grid side current, voltage, active power, reactive power, power factor; load-side current, voltage, active power, reactive power, power factor; The data display method is web display, which is visually displayed with bar charts, line charts, pie charts and other graphics.
| Compensation Capacity | Compensation Capacity kvar | 30 | 50 | 100 | 150 |
| AC Input | Rated Voltage | 380 (Allowable voltage fluctuation -40% ~ +20%) V | |||
| Working Frequency | 50 (1±2%) Hz | ||||
| Wiring Method | Three-phase four-wire system | ||||
| CT Requirement | Requires 3CT (Class 0.5 or better accuracy) 5VA, CT secondary side current is 5A | ||||
| Overall Efficiency | ≥97%, Over-compensation capacity is the maximum compensation | ||||
| Technical Specifications | Power Factor | ≤3% rated capacity | |||
| Switching Frequency | 20KHz | ||||
| Unbalanced Compensation | Can directly select to eliminate unbalanced and zero-sequence current compensation, the current unbalance can be reduced to 3% or less | ||||
| Reactive Power Compensation | Can directly select to eliminate inductive and capacitive no-load power, the power factor can reach 0.99 | ||||
| Harmonic Compensation | Can compensate for 2-13 times harmonics | ||||
| Circuit Topology | Three-phase full digital control | ||||
| Filter Setting | Can set unbalanced, no-load, and middle line current filtering separately | ||||
| Inhibition Characteristics | The device compensation capacity range, the compensation rate is greater than 95%; Over-compensation capacity range, it can compensate to the maximum capacity | ||||
| Response Time | 100us/10ms | ||||
| Cooling Method | Forced air cooling | ||||
| Noise | <65dB | ||||
| Operating Temperature | |||||
| Storage Temperature | -20°C~+60°C | ||||
| Humidity | Maximum 95% RH (no condensation) | ||||
| Protection Rating | IP54 (All protection levels can be customized) | ||||
| Mechanical Characteristics | Cabinet Size | 978mm (H)4850mm (W)4650mm (D), other dimensions can be customized | |||
| Shell Material | Stainless steel, other materials can be customized | ||||
| Entry | Side entry | ||||
| Monitoring Features | Handheld Terminal | Wireless handheld terminal, full-color touch screen, Wi-Fi direct connection to the device | |||
| GPRS Backend | Optional GPRS communication module, real-time remote monitoring of equipment | ||||
| Operating Characteristics | Can operate safely and stably in all weather conditions, will not affect the normal operation of other equipment in the system, does not endanger the power grid safety. The module has over-temperature, over-pressure, undervoltage, overcurrent, short circuit and other self-diagnosis functions and protection measures. If the module internal parts are short-circuited or damaged, it can automatically cut off and will not affect the power supply system. Under load conditions, the compensation capacity is greater than the rated compensation capacity, which can meet the body compensation output, continuous compensation, will not cause overload or equipment damage and withdrawal from operation. | ||||
Outdoor Pole-Mounted SVG Reactive Power Compensation Device Appearance
