CN202084939U - Intelligent comprehensive electric power compensation device - Google Patents
Intelligent comprehensive electric power compensation device Download PDFInfo
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- CN202084939U CN202084939U CN2011201672968U CN201120167296U CN202084939U CN 202084939 U CN202084939 U CN 202084939U CN 2011201672968 U CN2011201672968 U CN 2011201672968U CN 201120167296 U CN201120167296 U CN 201120167296U CN 202084939 U CN202084939 U CN 202084939U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to an intelligent comprehensive electric power compensation device. A major loop is provided with TSCs and a power module of a SVG, and also comprises a main controller, TSC controllers and an SVG controller, wherein N (N is more than one) groups of TSCs with fixed volume are available, all TSCs are in parallel connection, each TSC comprises three branches consisting a thyristor valve and a compensation capacitor that are in series connection, wherein the thyristor valve consists of two thyristors in parallel connection, the three branches are in triangular connection, and joints are respectively accessed into three phases of a power grid; and the power module adopts three electric level trigger inverters, and the rated capacity of the SVG is one Nth of the total capacity of the TSCs. The intelligent comprehensive electric power compensation device has the advantages that when the reactive compensation capacity is not exactly the integral multiple of that of a TSC single branch, the SVG realizes the surplus reactive compensation of all levels, so that a harmonic wave of the power grid is restrained, the requirement that switching is carried out when the capacitance and the voltage are zero is eliminated, a better switching environment is provided for the TSCs, the repeated switching can be carried out in short time, the responding speed is fast, and the reliability is high; and as the power module adopts the three electric level trigger inverters, switching frequency is lower and the generated harmonic wave is smaller.
Description
Technical field
The utility model relates to the Power System and its Automation technical field, particularly a kind of intelligent electric power comprehensive compensating device.
Background technology
The especially development of power electronic technology of development along with modern industrial technology, a large amount of nonlinear-load power consumption equipments such as modern power electronics devices insert electrical network, grid supply quality is had a strong impact on, the idle content of electrical network heightens, the harmonic wave that injects electrical network also increases thereupon, has caused the wave distortion of voltage and electric current.The application of various high-end precision equipments meanwhile makes the user also more and more higher to the requirement of the quality of power supply.Therefore reactive power compensation real-time and harmonic wave control have crucial meaning to optimizing electric network swim distribution, the raising quality of power supply and meeting consumers' demand.
Traditional low-voltage reactive power compensation switching capacitor group TSC device (thyristor) can be realized the quick contactless throw-in and throw-off of capacitor, but the existence of harmonic wave can make capacitor and system's generation parallel resonance, harmonic current is amplified cause capacitor to damage or the thyristor scaling loss, this problem frequently takes place in low-voltage distribution system.And electric power system method commonly used is to adopt contactor manual switching electric-power filter to come harmonic carcellation, and automatization level is extremely low, and slow motion can't be accomplished in good time switching.This kind compensation way can't satisfy compensation and change reactive power continuously, occurs the benefit phenomenon easily.
What traditional SVG device adopted is the controls of two level, and this control mode response speed is slower, and the harmonic wave that device produces is bigger, poor reliability.
The utility model content
The purpose of this utility model is to overcome above-mentioned defective, provides can realize network system is changed idle full remuneration continuously, and response speed is fast, and the harmonic wave of generation is little, the intelligent electric power comprehensive compensating device that reliability is high.
For achieving the above object, the intelligent electric power comprehensive compensating device that the utility model provides, comprise major loop, it is that TSC and static reacance generator are the power model of SVG that described major loop is provided with threephase switch, main contactor, three-phase reactor, threephase potential transformer, threephase current transformer, low-voltage reactive power compensation switching capacitor group, comprise that also master controller, TSC controller and static reacance generator are the SVG controller, wherein:
Described master controller is connected to after the described major loop threephase switch and with described threephase potential transformer and links to each other respectively with threephase current transformer, and the control signal of described master controller is connected to described TSC controller and SVG controller respectively;
Described TSC controller is connected with N group TSC parallel with one another, fixed capacity, N is big 1 integer, each TSC comprises the branch road that 3 thyristor valve groups that are made of two thyristors of reverse parallel connection are connected and constituted with compensation condenser, 3 described branch roads adopt triangle to connect, and its tie point is connected to respectively in the three-phase of electrical network;
Described SVG controller links to each other with described power model, described power model links to each other with described major loop through described three-phase reactor, main contactor and threephase switch, described power model is three level triggers inverters, and the rated capacity of described SVG is the 1/N of described TSC total capacity.
The utility model intelligent electric power comprehensive compensating device, wherein said master controller comprise the AD sampling A with its sampling CPU and master cpu that links to each other successively, the acquired signal of main circuit voltage and electric current is transferred to described AD sampling A, after the sampled data bus transfer is given described sampling CPU, be transferred to described master cpu by described sampling CPU through data/address bus through the AD conversion again.
Wherein said TSC controller comprise optical coupling isolation circuit with its DSP that links to each other successively and drive circuit, the output signal of described master cpu is transferred to described DSP through data/address bus, isolate through described photoelectric coupled circuit, pass through described drive circuit output drive signal again to described TSC.
The utility model intelligent electric power comprehensive compensating device, wherein said SVG controller comprises another DSP and circuits for triggering, described master cpu will compensate output signal and be transferred to described another DSP, and the current signal of described another DSP output obtains corresponding PWM waveform signal and output drive signal to described power model through described circuits for triggering.
The utility model intelligent electric power comprehensive compensating device, it is the chip formation of MAX1324 that wherein said AD sampling A adopts model, it is the chip formation of TMS320F2812 that described sampling CPU adopts model, it is the chip formation of TMS320C6713 that described master cpu adopts model, and it is the chip formation of EPM7256AE that described DSP adopts model.
The advantage and the good effect of the utility model intelligent electric power comprehensive compensating device are: because system organizes TSC with N to be parallel to and to receive on the electrical network, and three outputs of SVG are received on the major loop.Wherein, power model is three level triggers inverters, can make like this switching frequency lower, produce that harmonic current is littler, power density is higher.The rated capacity of SVG is the 1/N of TSC total capacity, when system's desired volume is not the integral multiple of the single branch road of TSC, SVG then realizes the classification reactive power compensation by the Control Parameter of acquisition TSC, realized by the SVG Control Parameter realize at different levels between the idle compensation of residue.Because SVG itself has the harmonic wave control function, can suppress mains by harmonics, for the TSC device provides higher switching environment, cancelled the condition that when capacitance voltage is zero, to carry out switching, can be implemented in and carry out the repetition switching in the short time, contain in load under the situation of harmonic current and realized quick continuous reactive power compensation and harmonic wave control, response speed is fast, the reliability height.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment.
Description of drawings
Fig. 1 is total figure of the utility model intelligent electric power comprehensive compensating device;
Fig. 2 is the circuit theory diagrams of AD sampling A;
Fig. 3 is the circuit theory diagrams of sampling CPU;
Fig. 4 is the circuit theory diagrams of master cpu;
Fig. 5 is the circuit theory diagrams of SVG controller DSP;
Fig. 6 is the circuit theory diagrams of SVG controller circuits for triggering;
Fig. 7 is the circuit theory diagrams of TSC controller.
Embodiment
With reference to Fig. 1, the utility model intelligent electric power comprehensive compensating device adopts low-voltage reactive power compensation switching capacitor group 5, be TSC, with the low pressure static reacance generator is that SVG mode in parallel is formed, and comprises power model 4, master controller 1, TSC controller 2 and the SVG controller 3 of major loop, TSC, SVG.
Major loop is provided with threephase switch, main contactor, three-phase reactor, threephase potential transformer and threephase current transformer.
The TSC of fixed capacity is the N group, and N is big 1 integer, and each TSC is parallel with one another.Each TSC comprises the branch road that 3 thyristor valve groups that are made of two thyristors of reverse parallel connection are connected and constituted with compensation condenser, and 3 branch roads adopt triangle to connect, and its tie point is connected to respectively in the three-phase of electrical network.
With reference to Fig. 2, Fig. 3 and Fig. 4, master controller 1 comprise AD sampling A U4 with its sampling CPU that links to each other successively (chip U1) and master cpu (chip J1).The voltage, the current sampling signal that are collected by threephase potential transformer and threephase current transformer are transferred to AD sampling A U4,, be transferred to master cpu by sampling CPU through data/address bus again and carry out computational analysis after the sampled data bus transfer is given sampling CPU through the AD conversion.
With reference to Fig. 7, TSC controller 2 comprise optical coupling isolation circuit with its DSP that links to each other successively (chip U3) and drive circuit, master cpu is transferred to DSP with result calculated through data/address bus, generate the pulse of certain width, isolate through photoelectric coupled circuit, again through the overdrive circuit output drive signal to TSC.Adopt digital circuit to produce pulse, can accurately control constantly in zero passage and produce pulse, and the width of pulse also can accurately be controlled by counter.Numerical control system based on DSP is not affected by environment, good reliability.
In foregoing circuit, it is the chip formation of MAX1324 that AD sampling A U4 adopts model, sampling CPU employing model is that the chip U1 of TMS320F2812 constitutes, and it is the chip J1 formation of TMS320C6713 that master cpu adopts model, and it is the chip U3 formation of EPM7256AE that DSP adopts model.
In the embodiment of the utility model intelligent electric power comprehensive compensating device, the switching of TSC is greatly improved, it is very important that TSC drops into choosing of the moment, total principle is, TSC drops into the moment of electric capacity, just thyristor is opened constantly, must be the moment that supply voltage equates with the capacitor precharge voltage.In order to reach this requirement, native system adopts thyristor and diode inverse parallel mode, its voltage is always maintained at the peak value of line voltage before the capacitor input, in case capacitor electrode pressure ratio line voltage peak value decreases, diode all can be with its voltage charging to the electrical network crest voltage.As long as when the line voltage peak value, trigger thyristor, just can avoid rush of current.As the TSC timing input, promptly when system voltage is equal with capacitance terminal voltage, carry out the switching action with thyristor terminal voltage zero passage.Like this, impulse current is similarly zero during switching first, and after thyristor was opened, capacitance voltage changed with system voltage, satisfied the condition of zero voltage switching.This state continues to supply voltage always and reaches peak point, thyristor is because capacitance current drops to zero and shutoff naturally, capacitor has been charged to the peak point of supply voltage, the condition that possesses desirable triggering and conducting, at this moment, apply the natural commutation that pulse will realize no transient process, cancelled the condition that when capacitance voltage is zero, to carry out switching, in fact can carry out the repetition switching at short notice.
With reference to Fig. 5 and Fig. 6, SVG controller 3 comprises another DSP (chip J6) and circuits for triggering, master cpu will compensate output signal and be transferred to another DSP, another DSP obtains corresponding PWM waveform according to the current value of current value that calculates and the actual output of device, output signal is passed to circuits for triggering after passing through chip J6 (74HC04) again, circuits for triggering obtain needed three-level pwm waveform according to the signal that receives, and output drive signal is to power model, thereby reaches the purpose of the current value that control output waveform following calculation obtains.The three level control that SVG controller 3 adopts, contrast are controlled with two traditional level and are had an enormous advantage, and this control mode not only response speed is fast, and the harmonic wave that device produces is also little, the reliability height.
The control procedure of the utility model intelligent electric power comprehensive compensating device is as follows: system passes to master controller 1 by sampling module with the parameter of the system that collects, master controller 1 is by computational analysis, idle and the harmonic content that the system that obtains is required, and calculate the needed TSC of opening group number, control the switching of the thyristor of TSC by TSC controller 2, in this simultaneously, controller can be passed to the compensation rate of being calculated the DSP of SVG control section by calculating remaining required idle and harmonic content.The rated capacity of SVG is the 1/N of TSC total capacity, when system's desired volume is not the integral multiple of the single branch road of TSC, SVG then realizes the classification reactive power compensation by the Control Parameter of acquisition TSC, realize by the SVG Control Parameter realize at different levels between the idle compensation of residue.The DSP of SVG control section is through calculating correct PWM waveform and output, power controlling module 4 produces idle, the required idle and harmonic wave of bucking-out system very accurately so just, because SVG itself has the harmonic wave control function, can suppress mains by harmonics, for the TSC device provides higher switching environment, produce a desired effect.
The utility model intelligent electric power comprehensive compensating device, TSC and SVG are controlled by DSP independently respectively, the not only compensation capacity and the compensation precision of accurate more control device, and saved cost, make that the device operation is more flexible, guaranteed the safety and stability of system.
Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design prerequisite; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection range of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (5)
1. intelligent electric power comprehensive compensating device, comprise major loop, it is that TSC (5) and static reacance generator are the power model (4) of SVG that described major loop is provided with threephase switch, main contactor, three-phase reactor, threephase potential transformer, threephase current transformer, low-voltage reactive power compensation switching capacitor group, it is characterized in that: also comprise master controller (1), TSC controller (2) and SVG controller (3), wherein:
Described master controller (1) is connected to after the described major loop threephase switch and with described threephase potential transformer and links to each other respectively with threephase current transformer, and the control signal of described master controller (1) is connected to described TSC controller (2) and SVG controller (3) respectively;
Described TSC controller (2) is connected with N group TSC parallel with one another, fixed capacity (5), N is big 1 integer, each TSC (5) comprises the branch road that 3 thyristor valve groups that are made of two thyristors of reverse parallel connection are connected and constituted with compensation condenser, 3 described branch roads adopt triangle to connect, and its tie point is connected to respectively in the three-phase of electrical network;
Described SVG controller (3) links to each other with described power model (4), described power model (4) links to each other with described major loop through described three-phase reactor, main contactor and threephase switch, described power model (4) is three level triggers inverters, and the rated capacity of described SVG is the 1/N of described TSC total capacity.
2. intelligent electric power comprehensive compensating device according to claim 1, it is characterized in that: wherein said master controller (1) comprise AD sampling A (U4) with its sampling CPU (U1) that links to each other successively and master cpu (J1), the acquired signal of main circuit voltage and electric current is transferred to described AD sampling A (U4), after the sampled data bus transfer is given described sampling CPU (U1), be transferred to described master cpu (J1) by described sampling CPU (U1) through data/address bus through the AD conversion again.
3. intelligent electric power comprehensive compensating device according to claim 1 and 2, it is characterized in that: wherein said TSC controller (2) comprise optical coupling isolation circuit with its DSP that links to each other successively (U3) and drive circuit, the output signal of described master cpu (J1) is transferred to described DSP (U3) through data/address bus, isolate through described photoelectric coupled circuit, pass through described drive circuit output drive signal again to described TSC (5).
4. intelligent electric power comprehensive compensating device according to claim 3, it is characterized in that: wherein said SVG controller (3) comprises another DSP (J6) and circuits for triggering, described master cpu (J1) will compensate output signal and be transferred to described another DSP (J6), and the current signal of described another DSP (J6) output obtains corresponding PWM waveform signal and output drive signal to described power model (4) through described circuits for triggering.
5. intelligent electric power comprehensive compensating device according to claim 4, it is characterized in that: it is the chip formation of MAX1324 that wherein said AD sampling A (U4) adopts model, it is the chip formation of TMS320F2812 that described sampling CPU (U1) adopts model, it is the chip formation of TMS320C6713 that described master cpu (J1) adopts model, and it is the chip formation of EPM7256AE that described DSP (U3) adopts model.
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| CN2011201672968U CN202084939U (en) | 2011-05-24 | 2011-05-24 | Intelligent comprehensive electric power compensation device |
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| CN2011201672968U CN202084939U (en) | 2011-05-24 | 2011-05-24 | Intelligent comprehensive electric power compensation device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326377A (en) * | 2013-06-28 | 2013-09-25 | 江苏国源电气有限公司 | 1140V three-level anti-explosion reactive compensation device |
| CN104065085A (en) * | 2014-06-03 | 2014-09-24 | 江苏华冠电器集团有限公司 | Comprehensive controller applied to SVG /TSC (Static Var Generator)/ (Twin Subcarrier) and control method thereof |
| CN104393784A (en) * | 2014-12-08 | 2015-03-04 | 国家电网公司 | High voltage reactive compensation inverter circuit and compensation method |
| CN105004951A (en) * | 2015-07-08 | 2015-10-28 | 上海南自科技股份有限公司 | Voltage drop generation device |
| CN107204623A (en) * | 2017-08-02 | 2017-09-26 | 安徽明都电气有限公司 | A kind of active compensation system of intelligent power distribution cabinet |
| CN107222194A (en) * | 2017-05-25 | 2017-09-29 | 江苏现代电力科技股份有限公司 | A kind of SVG and TSC mixing reactive-load compensation level controllers and its control method |
| CN108206530A (en) * | 2018-03-02 | 2018-06-26 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of load control method, apparatus and system with no-power compensation function |
| CN109936149A (en) * | 2019-03-27 | 2019-06-25 | 安徽三联学院 | A kind of capacitor fast-switching switch circuit maintaining technology based on DC voltage |
-
2011
- 2011-05-24 CN CN2011201672968U patent/CN202084939U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326377A (en) * | 2013-06-28 | 2013-09-25 | 江苏国源电气有限公司 | 1140V three-level anti-explosion reactive compensation device |
| CN104065085A (en) * | 2014-06-03 | 2014-09-24 | 江苏华冠电器集团有限公司 | Comprehensive controller applied to SVG /TSC (Static Var Generator)/ (Twin Subcarrier) and control method thereof |
| CN104393784A (en) * | 2014-12-08 | 2015-03-04 | 国家电网公司 | High voltage reactive compensation inverter circuit and compensation method |
| CN105004951A (en) * | 2015-07-08 | 2015-10-28 | 上海南自科技股份有限公司 | Voltage drop generation device |
| CN107222194A (en) * | 2017-05-25 | 2017-09-29 | 江苏现代电力科技股份有限公司 | A kind of SVG and TSC mixing reactive-load compensation level controllers and its control method |
| CN107204623A (en) * | 2017-08-02 | 2017-09-26 | 安徽明都电气有限公司 | A kind of active compensation system of intelligent power distribution cabinet |
| CN108206530A (en) * | 2018-03-02 | 2018-06-26 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of load control method, apparatus and system with no-power compensation function |
| CN109936149A (en) * | 2019-03-27 | 2019-06-25 | 安徽三联学院 | A kind of capacitor fast-switching switch circuit maintaining technology based on DC voltage |
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