harmonic filters in power system

Place of Origin	Shandong, China		Brand Name	Hoteam
Model Number	HTQF series

Specifications

ripple crisscross cancellation technology
strict thermal design
amorphous materials reactor-low noise
harmonic filters

 

harmonic filters in power system

 

active harmonic filter 

Introduction of Functions

Harmonic Filter: HTQF is composed of command current computing circuit and compensation current generating circuit. Command current computing circuit conducts real-time monitoring of current in circuit; switch the analogue current signals into digital signals, and send the signals into DSP for handling; separate harmonics and fundamental wave, send drive pulse in form of PWM signals to compensation current generating circuit; drive IGBT power module, produce compensation current input network which has the same amplitude as harmonic amplitude and inverse polarity; compensate or balance out harmonic current, eliminate power harmonics actively, and thus realize the dynamic quick and complement treatment of power harmonics.

Dynamic reactive power compensation: While filtering harmonics, according to detected need for reactive power compensation, HTQF command current computing circuit can control internal capative and inductive fundamental current of compensation current generating circuit, conduct real-time compensation, set the target value of reactive power compensation through operation board. There are 4 working modes for choice, namely, “filter priority”, “reactive power priority”, “harmonic filter only”, “and reactive power compensation only”. The working mode should be selected according to specific conditions of power distribution system.

Correct unbalanced 3 phases: HTQF can compensate the unbalanced 3 phases respectively. It can conduct phase adjustment of active power through DC Energy Storage Systems shared by 3 phases, thus to correct unbalanced load of 3 phases. The operation of this function can also be set by operation board.

 

The advantages of Hoteam active power filter

1,The main components are all imported famous brands, such as:ABB circuit breaker,Schneider air breaker,German EPCOS DC capacitor,Fuji contactor,Germon Infineon IGBT,USA TI control(DSP)chip and so on, high quality components improved safety and reliability, guaranteed the quality of active power filter.

2,Adopt ripple cancellation converter patent technology(China patent:200910019887.8 ,201010180701,201010503315.X ), high current tracking speed,low ripple wave and power loss.

3,higher stable structure and advanced control method(China patent:201010275272.4 ),this make sure APF can be running steadily in a varity of complex sites.

4,multiple frequency 150MHz 32 bit high speed DSP (TMS320F2812) cooperative work, complete order current operation and system control function in real-time, high control precision,fast speed.

5,DC energy storage capacitor adopts multiple measures, from multi-angles of Brand select,working voltage,over voltage protection,electric buffer resistance,install position to guarantee safe operation and reliability, can effectively prevent from over voltage,over current and over temperature problems, the annual average working temperature of capacitor is under 30°C.

6,Perfect fault detection and protection system, including self-test after power on,alarm and protection of various faults or abnormal events,history event record function, furthest guarantee the safe and steady operation of equipment.

7,add transient voltage suppressor at input circuit, meet requirement of lightning protection.

8,fiber optics drive, safe,reliable,high anti-interference ability.

9,RS485 port, standard MODBUS communication protocol, computer remote control function.

10,can realize dynamice split phase reactive power compensation and three phase unbalance correction function.

 

HTQF technical parameters

model	HTQF/3L-0.4/xxA  3P3L	HTQF/4L-0.4/xxA  3P4L
feature
	Apply to 3P3L system	Apply to 3P4L system, can realize netral line filter
Compensation current of each cabinet	50A	50A
	75A	75A
	100A	100A
	150A	150A
	200A	200A
	250A	250A
	300A	300A
	400A	400A
	500A	500A
	600A
input
voltage	400/600V     -15/+10%	400/600V     -15+10%
frequency	50/60HZ  ±5%	50/60HZ  ±5%
Performance index
Filter capacity	Can be more than 97%	Can be more than 97%
Filter range	2~50th harmonic	2~50th harmonic
Response time	Transient response<0.1ms, complete response<20ms	Transient response<0.1ms, complete response<20ms
Neutral line compensate ability	----	3 times in line RMS current
Reactive power compensation	Setting range of power factor is from inductive0.6 to capacitive 0.6	Setting range of power factor is from inductive0.6 to capacitive 0.6
Balance compensation	Programmable balance of power	Programmable balance power of phase and phase or phase and neutral line
Overload protection	Automatic current limiting when 100% rating output	Automatic current limiting when 100% rating output
Power loss	≤3% rated compensation capacity	≤3% rated compensation capacity
CT requirements	3set, 0.2magnitude or more,secondary 5A	3set, 0.2magnitude or more,secondary 5A
Current detection means	Source current detection or load current detection	Source current detection or load current detection
Display and interface
language	English/Chinese	English/Chinese
Operating button	Start/stop,reset,menu,confirm,fluctuation function keys and so on	Start/stop,reset,menu,confirm,fluctuation function keys and so on
Indicator light	Green: normal operation	Green: normal operation
	Orange: overcurrent/overload operation	Orange: overcurrent/overload operation
	Red: machine halt or alarm	Red: machine halt or alarm
Communication interface	RS-485	RS-485
Communication protocol	MODBUS(RTU)	MODBUS(RTU)
digitI/O	4 digital input, 2 digital alarm	4 digital input, 2 digital alarm
configuration
Unit operation	allow	allow
Parallel operation	10 sets at most	10 sets at most
IP	IP3X,(higher IP pls contact manufactuer)	IP3X,(higher IP pls contact manufactuer)
Color	RAL7035(light gray),can be customized according to use requirements	RAL7035(light gray), can be customized according to use requirements
Environment condition
temperature	-10~40°C	-10~40°C
Storage temperature	-25~55°C	-25~55°C
Relative humidity	Max 95%RH(no condensation)	Max 95%RH(no condensation)
altitude	1000m	1000m