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400V SVG Industrial Complete Cabinet
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400V SVG Industrial Complete Cabinet
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- Commodity name: 400V SVG Industrial Complete Cabinet
- Commodity ID: 1362032815968505856
- 类型: Industrial automation
- 品牌: Capni
Brand: Zhiyuan New Energy Description: The industrial static var generator (commonly referred to as SVG) is a new type of power reactive compensation device developed using modern power electronic technology and digital signal processing technology based on high-speed DSP devices.
1. Introduction
The industrial static var generator (referred to as SVG) is a new type of power reactive compensation device developed using modern power electronic technology and digital signal processing technology based on high-speed DSP devices.
It consists of two main components: a reference current computation circuit and a compensation current generation circuit. By using external current transformers to detect the reactive power content in the power grid in real time, the system obtains the reference current. The reference current computation circuit continuously monitors the current flowing in the power lines, converts the analog current signals into digital signals, and sends these digital signals to a high-speed digital signal processor (DSP) for further processing. The DSP separates harmonics from the fundamental wave and then outputs drive pulses in the form of pulse-width modulation (PWM) signals to the compensation current generation circuit. These pulses drive IGBT or IPM power modules, which in turn control the inverter to generate the required reactive current, thereby achieving the purpose of reactive power compensation.
2. Basic Components
The SVG system mainly consists of the main contactor KM1, the pre-charge contactor KM2, the pre-charge resistor R, the filtering inductor L, the voltage-source PWM rectifier bridge (VSR), and the DC bus capacitor C.
The system diagram is shown in Figure 1. Resistor R serves as the pre-charge resistor for the system. Once KM2 closes, the voltage across the system bus capacitor begins to charge slowly. KM1 controls the main circuit and simultaneously shorts out the pre-charge resistor R. The inductor acts as a power-transfer interface between the power converter and the power system; on one hand, it stores energy, and on the other hand, it filters out high-frequency switching ripple currents. The voltage-source PWM rectifier bridge is the power conversion component of the SVG, composed of insulated-gate bipolar transistors (IGBTs). It employs space-vector pulse-width modulation (SVPWM) technology to drive the IGBTs and generate the compensation current waveform. The DC capacitor module stores the DC energy produced by the IGBT power conversion module.
Key words:- 690V无功补偿设备
- 690V静止无功发生器
- 无功补偿
- 690V-SVG
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Characteristics of industrial products
Design Concept
Ø The industrial-grade SVG is a product specially developed by our company for industrial application environments, featuring a vertical structure design for its active modules. This structural design employs high-capacity IGBT power devices, with device ratings exceeding three times the effective value, ensuring ample safety margins and enabling long-term operation even under significant load surges. The modules utilize axial-flow fans for heat dissipation, providing large airflow, sufficient air pressure, and excellent cooling performance. The entire cabinet adopts a bottom-in, top-out airflow configuration: axial-flow fans are installed at the top of the cabinet to extract air, while dust-proof louvers are positioned at the bottom to allow fresh air intake. This design effectively isolates the internal components from the external environment, making it particularly well-suited for high-temperature industrial sites and harsh environments—especially those with high dust concentrations. Examples include powder plants, stone-processing facilities, tile factories, cement plants, and similar applications.
Anti-high-voltage distortion
Ø Suitable for industrial load distribution systems with harmonic voltage distortion rates ranging from 5% to 25%, featuring a subtle-level instantaneous response speed and a full response time of less than 10 ms.
Comprehensive compensation, safety and stability
Ø Harmonic mitigation, inductive and capacitive reactive power compensation, with freely selectable compensation combinations.
Ø Automatic current-limiting operation and comprehensive fault protection features.
Advanced control strategies and topological structure design
Ø It employs an LCL topology filter that, under output current conditions, does not introduce high-frequency IGBT switching harmonic interference and is suitable for any on-site grid system impedance without the risk of resonance.
Self-diagnosis and self-startup function for faults
Ø The device features a self-recovery function that allows it to resume operation automatically after a shutdown caused by factors other than device malfunctions. Before initiating self-recovery, the device will perform an automatic diagnosis of both the external power grid and the device itself; only if the diagnosis is successful will the device restart automatically. If the issue lies with the external power grid, the device will no longer attempt to start up and will transmit a device failure alarm to the host computer, while also illuminating its own fault indicator light.
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Input
Rated Voltage (V)
400V AC
System voltage range
±10%
Frequency (Hz)
50/60 ±5%
Wiring method
Three-phase three-wire system
Output and Installation Method
Type
Complete cabinet
Rated capacity (kvar)
75 kVar, 100 kVar, 200 kVar, 300 kVar, 400 kVar, 500 kVar, 600 kVar, 800 kVar
Incoming line method
Top-entry/Bottom-entry/Crossbar busbar passing through the top of the cabinet (the cabinet’s incoming cable connection method must be specified in the contract).
Performance metrics
Filter rate
≥90% (within the ordered capacity range and with harmonic content of the load exceeding 30% of the ordered capacity)
Filtering range
2nd to 13th harmonics (if even-order harmonics need to be addressed, please specify when placing the order)
Full response time
≤10ms
Instant response time
≤100us
Dynamic current
1.2 times the rated capacity output of the filter, 1 minute
Power factor setting compensation
Be equipped with
Inductive or capacitive compensation
Optional
Protection
Overload protection
Automatic current limiting at 100% rated output.
Other protections
Overvoltage protection, undervoltage protection, overtemperature protection
Operating mode
Single-unit or parallel operation
Okay.
Display and Operation
Display interface
7-inch touch screen
Display status
Current, voltage, power, harmonic distortion rate, and more
Operation
Multiple operation mode options, remote or local.
Communication (RS485 interface)
Modbus-RTU features a remote monitoring interface and a backend database, enabling users to conveniently monitor various operating parameters of the device from internet-connected terminals.
Phase Sequence Adaptive
Be equipped with
Environmental conditions
Protection level
IP20 (customizable)
Operating ambient temperature
-10℃~40℃
Storage/Transportation Temperature
-40℃~60℃
Work / Storage Humidity
Relative humidity: 20–95%, no condensation / Relative humidity: 10–95%
Altitude
Below 1000m (reduce capacity for use at higher altitudes)
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