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15~600 kvar PQC complete cabinet
- Product Description
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- Technical Parameters
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15~600 kvar PQC complete cabinet
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- Commodity name: 15~600 kvar PQC complete cabinet
- Commodity ID: 1362032824705241088
- 类型: Industrial automation
- 品牌: Capni
Brand: Zhiyuan New Energy Description: The PQC Power Quality Comprehensive Compensator is an intelligent, next-generation power electronic device developed by our company. It employs a highly efficient power electronic topology and advanced all-digital control technology to dynamically compensate reactive current and harmonic current, thereby improving the power factor and eliminating harmonic currents.
1. Introduction
The Power Quality Compensator (hereinafter referred to as PQC) is an intelligent, active-type new power electronic device developed by our company. It employs a highly efficient power electronic topology and advanced all-digital control technology to dynamically compensate reactive currents and harmonic currents, improve the power factor, and eliminate harmonic currents.
PQC is a flexible power converter. First, PQC measures the reactive current and harmonic current generated by the load. Then, it generates new reactive and harmonic currents with the same magnitude but in opposite phases, thereby eliminating the vast majority of reactive and harmonic currents in the power supply network. By canceling out the reactive and harmonic currents in the compensation circuit, the following effects can be achieved:
▪ Significantly reduces distortion in the voltage and current waveforms of the power supply network;
▪ Significantly improves the power factor of the power supply system, reduces the design capacity of transformers, and lowers initial capital investment.
▪ Reduce losses in transformers and cables, lower their temperature, and save energy.
▪ Reduce the risk of interference to other equipment caused by system harmonics;
▪ Increase the terminal voltage to improve power quality.
2. Basic Components
The PQC 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 SVG, 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 produced by the IGBT power conversion module.
Key words:- 无功补偿
- 谐波治理
- 电能质量综合治理装置
- 全校型电能质量治理装置
- PQC
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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
Rated Capacity (kvar+A)
15 kVar + 5 A, 35 kVar + 10 A, 50 kVar + 20 A, 60 kVar + 25 A, 75 kVar + 30 A, 100 kVar + 40 A
200 kVar + 80 A, 300 kVar + 120 A, 400 kVar + 160 A, 500 kVar + 200 A, 600 kVar + 240 AIncoming 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
1.2x 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)
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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Our staff will contact you within 24 hours (on business days). If you require additional services, please feel free to call our service hotline:0512-50132658
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