CN201163721Y

CN201163721Y - Joint operation control device based on static reactive compensator and mixed injection type active filter

Info

Publication number: CN201163721Y
Application number: CNU2007200654970U
Authority: CN
Inventors: 罗安; 陈栋; 赵伟; 帅智康; 杨晓; 吴传平
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2007-12-19
Filing date: 2007-12-19
Publication date: 2008-12-10
Anticipated expiration: 2017-12-19

Abstract

The utility model discloses a combined operating control device based on a static var compensator(SVC) and a hybrid injection type active filter(HAPF). The device comprises the static var compensator(SVC), the hybrid injection type active filter(HAPF) and a set of double DSP control plates, wherein the static var compensator(SVC) consists of two parts of a mechanical switching capacitance(MSC) and a thyristor control reactor(TCR); the hybrid injection type active filter(HAPF) consists of an active part, an output filter, a coupling transformer, a fundamental wave series resonant circuit and a passive filter branch, and the double DSP control plate is formed by the interconnection between double DSP chips based on an McBSP port. The control device achieves aims of filtering waves, harmonizing waves and improving the dynamic performance of the device and the systematic stability, realizes the optimized control of a reactive factor and a power factor, provides a large amount of dynamic reactive power reserve for the power system and is greatly meaningful for stabilizing a bus voltage and compensating the reactive power of a transmission network.

Description

Cooperation control device based on Static Var Compensator and mixing injection active filter

Technical field

The utility model relates to the core technology of electric power system Static Var Compensator and hybrid active filter, particularly a kind of cooperation control device based on Static Var Compensator SVC and mixing injection active filters H APF.

Background technology

Since 1970's, because the develop rapidly of power electronic technology, the application of various electronic power conversion devices in electric power system, industry, traffic and family is increasingly extensive, and the harmonic pollution in the electrical network is serious further; Simultaneously, because the power factor of most of power electronic equipments is very low, also greatly reduce the power supply quality of electrical network.Therefore, harmonic carcellation pollutes, improves the key subjects that power factor has become current power operation and production division.Active power filtering and reactive power compensator are the power products of new generation that belongs to flexible ac transmission or flexible transmission (Flexible AC Transmission System), and its operation principle and traditional power equipment exist in essence different.Active power filtering and reactive power compensator are to utilize device for high-power power electronic (as IGBT, GTO) to make the power supply that a system needs, and this power supply can produce with the anti-phase same harmonic wave of system harmonics and come harmonic wave in the bucking-out system; Also can realize reactive power compensation for system provides the reactive current that needs compensation.Compare with traditional compensation method, active power filtering and static passive compensation device can be realized the idle compensation to capacitive reactive power of unit perception; Can realize according to system idle demand, and accomplish that substantially " immediately " adjust, the adjustment time can reach 0.01s.

At present, Static Var Compensator mainly comprises thyristor-controlled reactor (TCR) and thyristor control capacitor (TSC), thyristor-controlled reactor and fixed capacitor versions such as (FC).Because the electric current that TCR sends is a non-sine, just produces harmonic wave thereupon, must supporting corresponding filter.What traditional SVC filter adopted is one group of passive filter (PPF) group, it is simple in structure, low, the technology maturation of one-tenth wood. but the shortcoming of its maximum is: and filtering characteristic is subjected to the influence of electric network impedance, series and parallel resonance between electrical network and filter may take place, can not realize dynamic compensation to harmonic wave, effectively high material consumption. volume is big.

APF has good filtering characteristic, and can not constitute resonance.Yet because the restriction of high-power turn-off device (GTR, GTO, IGBT) development level, APF does not bear the requirement of high voltage, the inhibition of jumbo nonlinear-load AC system side harmonic wave.In order to satisfy the filtering requirements of big capacity nonlinear-load. from the nineties in last century so far some people the filter structure that various APF mix with PF has been proposed, i.e. hybrid active electric filter (HAPF).

And HAPF has taken into account both strong points, and initial investment is little, and the cost performance height can satisfy the requirement of high-voltage large-capacity system practicability, is the form that has very much application prospect in the present engineering.Yet to the cooperation of SVC and HAPF, aspect research and utilization, also few people relate to, and a kind of scheme of nobody's proposition realizes that HAPF suppresses the specific times harmonic that sends of SVC.The difficult point of its technology is to solve between the HAPF filter effect and the stability of a system and has contradiction, and how to realize the coordination control to SVC and HAPF, improves system performance and stability.

The utility model content

The purpose of this utility model is the defective that exists at prior art, a kind of cooperation control device based on Static Var Compensator SVC and mixing injection active filters H APF is proposed, can realize SVC device harmonic compensation fast and effectively, improve the dynamic performance index of SVC, improve the stability of SVC.

To achieve these goals, the technical solution adopted in the utility model is, described cooperation control device based on Static Var Compensator SVC and mixing injection active filters H APF, comprise Static Var Compensator SVC, mix injection active filters H APF and the two DSP control boards of a cover, wherein Static Var Compensator SVC is made up of mechanical switched capacitor MSC and two parts of thyristor-controlled reactor TCR; Hybrid active filter HAPF is made up of active part, output filter, coupling transformer, fundamental series resonance circuit and passive filtering branch road, the electrical wiring of described HAPF is that the passive filtering branch road and the fundamental series resonance circuit of 2 subharmonic resonance is articulated on the 10kV bus, with voltage source inverter as active part, dc terminal is a large bulk capacitance, output is connected to output filter, and active part inserts the passive filtering branch road by coupling transformer; The electrical wiring of described Static Var Compensator SVC is that MSC and TCR directly are articulated in the 10kV bus; Two DSP control boards are made of the two dsp chip interconnection based on the McBSP port.

Operation principle of the present utility model is as described below: utilize series resonance injected mixed active filters H APF that Static Var Compensator SVC is sent 2 times, 5 times, 7 times, 11 times, 13 times times harmonic is predicted and filtering.Described series resonance injected mixed active filter adopts load-current feedforward control strategy, i.e. I _APF(S)=F (s) I _Lh, I _LhBe the load harmonic current.Wherein Static Var Compensator SVC is made up of mechanical switched capacitor MSC and two parts of thyristor-controlled reactor TCR; And, carry out the idle continuous adjusting of perception by control to the TCR trigger angle; By switching control, carry out the interval of capacitive reactive power and regulate MSC.Described pair of DSP control board realized the coordination control of SVC and HAPF by two control chips (TMS320F2812), the function of this control board comprises carries out high speed, synchronous data collection to load voltage, electric current six road signals, Filtering Processing, first-harmonic, Harmonics Calculation, the parameter of controlled output, export pwm control signal then, realize the data communication of full duplex, control chip at SVC and HAPF is realized data interaction, realize the fast detecting and the calculating of harmonic current, improve system response time and data-handling capacity.

In sum, described in the utility modelly can realize SVC device harmonic compensation fast and effectively based on Static Var Compensator SVC and the cooperation control device that mixes injection active filters H APF, improve the dynamic performance index of SVC, improve the stability of SVC.

Description of drawings

Fig. 1 is an example structure schematic diagram in the utility model;

Fig. 2 is two DSP control board schematic diagrames among the embodiment in the utility model.

Embodiment

In the present embodiment based on Static Var Compensator SVC and the cooperation control device structure of mixing injection active filters H APF as shown in Figure 1.

The electrical wiring of Static Var Compensator SVC is one group of machinery switched capacitor (MSC) and a thyristor-controlled reactor (TCR) branch road.All SVC branch roads all are mounted on the 10kV bus, and the 10kV bus is three windings of two main transformers, the inlet wire that winding of main transformer is the 220kV transmission line, and the secondary winding of main transformer is the outlet of 121kV transmission line.This mode of connection makes SVC to carry out dynamic passive compensation by the whole transmission line to more high-grade (220kV) under relatively low electric pressure (10kV).The electrical wiring that mixes injection active filters H APF is that the passive filtering branch road and the fundamental series resonance circuit of 2 subharmonic resonance is articulated on the 10kV bus.As main active part, adopt the pulse-width modulation PWM inverter based on intelligent IGBT module with voltage source inverter, dc terminal is a big electric capacity, and output is connected to output filter, with this high frequency burr that comes filtering switching device break-make to cause.Active part by coupling transformer through fundamental series resonance injection type circuit.Because L ₁C ₁Series resonance takes place in network at the fundamental frequency place, impedance is very little, and inverter only bears very little fundamental voltage, and therefore device has overcome the capacity limit of active filter effectively, and for the harmonic component that is higher than fundamental frequency, L ₁C ₁Network impedance is bigger, and the harmonic current overwhelming majority that active part produces can not have a strong impact on person who lives in exile's main circuit to the harmonic wave output generation of active part.Two DSP control boards are connected with thyristor-controlled reactor with mixing injection active filter respectively by the output pulses trigger module, and insert mechanical switched capacitor by isolation and the power amplifier module that is connected with its input/output port.

Referring to Fig. 2, by the coordination control of two DSP control boards by two control chip TMS320F2812 realization SVC and HAPF, control parallel computation and data sharing realize both coordination control and system optimization work.Two DSP control boards adopt independently electric power system, by the Optical Fiber Transmission pwm control signal, realize the high-low pressure electrical isolation, by the pulse triggering means control thyristor and the igbt (IGBT) of special use.

Claims

1, a kind of cooperation control device based on Static Var Compensator SVC and mixing injection active filters H APF, comprise Static Var Compensator SVC, it is characterized in that, also comprise and mix injection active filters H APF and the two DSP control boards of a cover, wherein Static Var Compensator SVC is made up of mechanical switched capacitor MSC and two parts of thyristor-controlled reactor TCR; Hybrid active filter HAPF is made up of active part, output filter, coupling transformer, fundamental series resonance circuit and passive filtering branch road, the electrical wiring of described HAPF is that the passive filtering branch road and the fundamental series resonance circuit of 2 subharmonic resonance is articulated on the 10kV bus, with voltage source inverter as active part, dc terminal is a large bulk capacitance, output is connected to output filter, and active part inserts the passive filtering branch road by coupling transformer; The electrical wiring of described Static Var Compensator SVC is that MSC and TCR directly are articulated in the 10kV bus; Two DSP control boards are made of the two dsp chip interconnection based on the McBSP port.

2, according to the described cooperation control device of claim 1, it is characterized in that two dsp chips are chip TMS 320 F 2812 based on Static Var Compensator SVC and mixing injection active filters H APF.