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15~900A APF Complete Cabinet
- Product Description
- Features & Advantages
- Technical Parameters
- Related manuals
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15~900A APF Complete Cabinet
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- Commodity name: 15~900A APF Complete Cabinet
- Commodity ID: 1362032821261717504
- 类型: Industrial automation
- 品牌: Capni
Brand: Zhiyuan New Energy Description: The entire APF cabinet is equipped with a 7-inch high-definition touch screen, enabling users to view system parameters such as voltage, current, active power, reactive power, power factor, harmonic content, and the harmonic current output by the device.
1. Introduction
The Active Power Filter (APF for short) is a new type of specialized equipment designed for power harmonic mitigation, manufactured using modern power electronics 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 means of external current transformers, the circuit detects in real time the harmonic currents and reactive currents at various frequencies in the power grid, thereby obtaining the reference currents. The reference current computation circuit continuously monitors the currents 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 the 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, generating a compensation current that is equal in magnitude to the harmonic currents in the power grid but opposite in polarity. This compensation current is injected back into the power grid, effectively compensating for or canceling out the harmonic currents and actively eliminating power harmonics.
2. Basic Components
The APF 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, among other components.
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, which is the power conversion component of the APF, is 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 generated by the IGBT power conversion module.
Key words:- 谐波治理
- 有源滤波器
- 有源滤波柜
- APF
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More features, more modes
Ø Harmonic compensation, reactive power compensation, and harmonic-reactive power joint compensation—all in one device; multi-purpose functionality.
Ø Equipped with harmonic subharmonic compensation function, allowing setting of reactive power compensation ratio;
Ø High-definition color touch screen that displays system and device operating parameters in real time;
Comprehensive protection features to enhance user application stability.
Ø An effective-value peak dual-setting automatic current-limiting algorithm that, when the harmonic current of the load exceeds the device’s output, automatically limits the device’s output to 100% without any risk of overload.
Ø Equipped with comprehensive protection features, including overcurrent, overvoltage, undervoltage, and overtemperature protection, ensuring the system operates safely and reliably.
Advanced control strategies and topological structure design
Ø An improved detection technique based on instantaneous reactive power theory, which can detect harmonic currents in real time, automatically track changes in load harmonics, and features high controllability and rapid responsiveness.
Ø It employs an LCL topology filter that, even when harmonic currents are present at the output, does not introduce high-frequency IGBT switching harmonics or cause resonance, and is suitable for any on-site grid system impedance.
Highly integrated, modular, and serialized.
Ø Modular design, compact size and lightweight, high power density, and easy installation and maintenance;
Ø It can be flexibly combined and paralleled to meet different capacity requirements, enhancing equipment reliability and maintainability while achieving standardized production, thereby greatly simplifying system installation and maintenance.
Ø Independent air duct design for each module effectively prevents environmental dust from adhering and enhances the product’s heat dissipation efficiency.
Advanced user experience
Ø The device features a self-diagnosis and self-startup function. It is capable of automatically recovering from a shutdown caused by factors other than device malfunctions. Before initiating self-recovery, the device will automatically diagnose both the external power grid and itself; only after passing the diagnostic test can it proceed with self-startup. If the device attempts self-recovery three times within 30 minutes but fails each time to start up normally, it will shut down, transmit a device failure alarm to the host computer, and illuminate 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 / Three-phase four-wire system
Output and Installation Method
Type
Complete cabinet
Capacity
15A, 25A, 35A, 50A, 75A, 100A, 125A, 150A, 200A, 300A, 400A, 500A, 600A, 750A, 900A
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 50th 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
1.2x filter rated capacity output, 1 min
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)
Noise
≤55DB
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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