CN102843060A - Two-level two-direction current transformer and control method thereof - Google Patents

Two-level two-direction current transformer and control method thereof Download PDF

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Publication number
CN102843060A
CN102843060A CN2012103343428A CN201210334342A CN102843060A CN 102843060 A CN102843060 A CN 102843060A CN 2012103343428 A CN2012103343428 A CN 2012103343428A CN 201210334342 A CN201210334342 A CN 201210334342A CN 102843060 A CN102843060 A CN 102843060A
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converter
voltage
contactor
current
links
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CN2012103343428A
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Chinese (zh)
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CN102843060B (en
Inventor
徐进
孙善勤
刘婉丽
刘伟
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中船重工鹏力(南京)新能源科技有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40Arrangements for reducing harmonics

Abstract

The invention discloses a two-level two direction current transformer and a control method of the two-level two direction current transformer. The inverter comprises a direct-current (DC) breaker, a DC filter, a DC/DC converter, a DC/alternating-current (AC) converter, an AC filter, an AC contactor I, an AC contactor II, an isolation transformer, an AC breaker, a DC/DC pulse-width modulation (PWM) drive circuit, a DC/AC PWM drive circuit, a control panel and a human-computer interface. The current transformer is simple in structure and low in cost. In the control method, the DC/AC converter and the DC/DC converter are controlled independently, so that the whole current transformer is of a modular structure without mutual interferences, distribution of electric energies is managed preferably, and fault diagnosis and inspection for a system are convenient.

Description

A kind of twin-stage two way convertor and control method thereof

Technical field

The present invention relates to a kind of twin-stage two way convertor and control method thereof, belong to the power transmission and transformation technical field.

Background technology

Use along with some non-linear and time variation electronic installations etc. are large-scale, make that electric current contains a large amount of harmonic waves and idle component in the electrical network, cause current waveform seriously to distort, bring harm for the production and the transmission of electric energy, also influence the use of electronic equipment.

All there is the excessive or too small problem of charging current in storage battery at charging initial stage and later stage, can produce harm to some current ripples responsive type storage battery if current ripples is excessive.When battery discharging, current transformer is operated in discharge mode, and the effect of discharging and recharging of inductance must cause the generation of storage battery output current ripple in the circuit.Two way convertor exists the very flexible of system and the shortcoming of configurability difference at present; Realize that harmonic wave suppresses and reactive power compensation; Traditional method suppresses and reactive power compensator all can for specially harmonic wave of system configuration, and this has increased system cost undoubtedly, but integrated level is not high.

Summary of the invention

The technical problem that the present invention solves provides and a kind ofly need not to increase extra harmonic wave and suppress with the reactive power compensator device can be realized filtering harmonic, dynamic compensating system is idle with voltage fluctuation, suppress the twin-stage two way convertor of resonance, raising power factor.

For solving the problems of the technologies described above, a kind of twin-stage two way convertor of the present invention comprises dc circuit breaker, DC filter, DC/DC converter, DC/AC converter, alternating current filter, A.C. contactor I, A.C. contactor II, isolating transformer, AC circuit breaker, DC/DC PWM drive circuit, DC/AC PWM drive circuit, control board and man-machine interface;

Wherein, the input of said DC filter is connected with batteries via dc circuit breaker; The low-pressure end of said DC/DC converter links to each other with the output of DC filter, and high-pressure side links to each other with the low-pressure end of DC/AC converter; The input of said alternating current filter links to each other with the high-pressure side of DC/AC converter, and output links to each other with the A.C. contactor II with A.C. contactor I parallel with one another respectively;

The low-pressure end of said isolating transformer links to each other with the output of A.C. contactor I, A.C. contactor II respectively, and high-pressure side is connected with electrical network via ac bus with after AC circuit breaker links to each other;

Said control board comprises DC/DC control board and DC/AC control board, and the DC/DC control board links to each other with DC/DC PWM drive circuit; The DC/AC control board links to each other with DC/AC PWM drive circuit; This control board is connected with man-machine interface through the CAN bus.

Simultaneously, for realizing DC-to-dc, DC-AC Two Stages, manage the distribution of electric energy largely, the present invention also provides a kind of control method of twin-stage two way convertor, comprises following method:

Step 1, startup twin-stage two way convertor are provided with basic parameter through man-machine interface, and said basic parameter comprises bound, communication modes and the filtering mode of charging and discharging of accumulator electric current maximum permissible value, charging/discharging voltage;

The mode of operation of step 2, selection two way convertor, said mode of operation comprises battery charging pattern and batteries discharge mode; Systematic sampling carries out the passage self check, if fault-free, then the closed A.C. contactor II of elder generation judges whether line voltage connects normally again, if connect normally then closed A.C. contactor I;

The pwm pulse modulation program of step 3, startup DC/AC converter; Detect the dc bus side voltage of DC/AC converter in real time, whether the dc bus side voltage of judging the DC/AC converter simultaneously judges batteries terminal voltage whether more than or equal to 25V more than or equal to 620V; If; Then dc circuit breaker is closed, starts the pwm pulse modulation program of DC/DC converter, and the realization batteries is carried out charge or discharge; If not then dc circuit breaker is in off-state;

Step 4, detect the electric current and the voltage of batteries in real time, when batteries is full of or discharge off promptly reaches and discharges and recharges upper lower limit value, the two way convertor power cut-off.

The present invention compared with prior art has following significant advantage: 1) the present invention is provided with user-machine interface, can set mode of operation and running parameter flexibly, makes charge and discharge process simulate best charging and discharging curve preferably; Simultaneously on man-machine interface, can realize the running status of current transformer is monitored in real time, get information about very much the running status of current transformer; 2) the harmonic wave detection module is adopted in the control of DC/AC converter of the present invention, can detect harmonic current and reactive current, has the adjustable function of filtering and power factor; 3) the present invention realizes that Two Stages is the independent control of DC/AC converter and DC/DC converter, and whole device is realized modular construction, does not disturb mutually, for the failure diagnosis and the inspection of system provides convenience.

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail;

Description of drawings

Fig. 1 is the structured flowchart of twin-stage two way convertor of the present invention;

Fig. 2 is the control block diagram of DC/AC converter among the present invention;

Fig. 3 is the control block diagram of DC/DC converter among the present invention;

Fig. 4 is a twin-stage two way convertor control method flow chart of the present invention;

Embodiment

As shown in Figure 1; A kind of twin-stage two way convertor of the present invention comprises dc circuit breaker 1, DC filter 2, DC/DC converter 3, DC/AC converter 4, alternating current filter 5, A.C. contactor I 6, A.C. contactor II 7, isolating transformer 8, AC circuit breaker 9, DC/DC PWM drive circuit 12, DC/AC PWM drive circuit 13, control board 10 and man-machine interface 11;

Wherein, the input of said DC filter is connected with batteries via dc circuit breaker; The low-pressure end of said DC/DC converter links to each other with the output of DC filter, and high-pressure side links to each other with the low-pressure end of DC/AC converter; The input of said alternating current filter links to each other with the high-pressure side of DC/AC converter, and output links to each other with the A.C. contactor II with A.C. contactor I parallel with one another respectively;

The low-pressure end of said isolating transformer links to each other with the output of A.C. contactor I, A.C. contactor II respectively, and high-pressure side is connected with electrical network via ac bus with after AC circuit breaker links to each other;

Said control board comprises DC/DC control board and DC/AC control board, and the DC/DC control board links to each other with DC/DC PWM drive circuit; The DC/AC control board links to each other with DC/AC PWM drive circuit; This control board is connected with man-machine interface through the CAN bus.

Wherein, the DC/DC converter is formed in parallel by three buck translation circuits (buck), and the DC/AC converter takes parallel connection type APF topological structure to connect, and is a three phase full bridge circuit, carries out inversion or rectification work.

DC/DC control board 101 adopts 32 fixed point TMS320F2812DSP and 32 floating-point high speed numerical processor TMS320F28335 of TI company respectively with the master controller of DC/AC control board 102; Carry out independent control; Do not disturb mutually, its maximum operating frequency is 150MHZ, and processing speed is fast.

Said man-machine interface is provided with liquid crystal display, control button, indicator light and operation monitoring and shows; Said control button comprise reset, cancellation, menu and button is set, said indicator light comprises power lights, operation display lamp, transmission, accepting state lamp and fault display lamp; Show that through operation monitoring output voltage electric current and DC bus-bar voltage electric current to batteries carry out monitoring display.

This current transformer is provided with protective circuit manually, and mandatory cut-out main circuit makes current transformer be in off-mode.

This current transformer is provided with fault detect and warning and shows; Voltage and current signal during to the closure state of state, alternating current-direct current circuit breaker and the A.C. contactor of the temperature of IGBT fin, PWM drive plate and current transformer operating state detects; If fault is arranged; Then buzzer warning shows, and on man-machine interface, carries out fault data recorder.

As shown in Figure 4, a kind of control method of twin-stage two way convertor may further comprise the steps:

Step 1, startup twin-stage two way convertor are provided with basic parameter through man-machine interface, and said basic parameter comprises bound, communication modes and the filtering mode of charging and discharging of accumulator electric current maximum permissible value, charging/discharging voltage;

The mode of operation of step 2, selection two way convertor, said mode of operation comprises battery charging pattern and batteries discharge mode; Systematic sampling carries out the passage self check, if fault-free, then the closed A.C. contactor II of elder generation judges whether line voltage connects normally again, if connect normally then closed A.C. contactor I;

The pwm pulse modulation program of step 3, startup DC/AC converter; Detect the dc bus side voltage of DC/AC converter in real time, whether the dc bus side voltage of judging the DC/AC converter simultaneously judges batteries terminal voltage whether more than or equal to 25V more than or equal to 620V; If; Then dc circuit breaker is closed, starts the pwm pulse modulation program of DC/DC converter, and the realization batteries is carried out charge or discharge; If not then dc circuit breaker is in off-state;

Wherein, DC/AC converter and DC/DC converter are independently controlled, and be as shown in Figure 2, and the pwm pulse modulated process of DC/AC converter is specific as follows:

Steps A: the dc voltage to the DC/AC converter is sampled, and obtains feedback signal U Cd

Step B: with the voltage given signal With dc voltage feedback signal U CdDifference send into pi regulator 14 and carry out that PI regulates and amplitude limit 15, as the input of harmonic wave detection module 16, to guarantee the stable of dc voltage;

Step C: foreign current transducer CT gathers the AC side three-phase current signal i of DC/AC converter a, i b, i cDeliver to the harmonic wave detection module, this module will utilize the ip-iq method to extract harmonic current The harmonic compensation current i that need provide as the given of hysteresis regulator and DC/AC converter Ca, i Cb, i CcCompare, the difference that obtains is respectively through hysteresis regulator 117, hysteresis regulator 2 18, hysteresis regulator 3 19, and output produces the modulation signal of circuit 20 as SPWM, and then controls the pulse output of DC/AC converter.

As shown in Figure 3, the pwm pulse modulated process of said DC/DC converter is specific as follows:

Step a, dc low-voltage side voltage, the electric current of DC/DC converter are sampled, obtain feedback voltage, current signal U d, i d

Step b, with the voltage given signal With dc voltage feedback signal U dDifference after subtracting each other is as the input of PID adjuster 1; With the given signal of electric current With DC side electricity current feedback signal i dDifference after subtracting each other is as the input of PID adjuster 2; Respectively amplitude limit is carried out in the output of PID adjuster 1 and PID adjuster 2; Value behind the amplitude limit produces circuit through EPWM again and produces the input of pwm signal as DC/DC PWM drive circuit, through the level conversion of DC//DC PWM drive circuit and then the pulse output of control DC/DC converter;

Step 4, detect the electric current and the voltage of batteries in real time, when batteries is full of or discharge off promptly reaches and discharges and recharges upper lower limit value, the two way convertor power cut-off.

In whole control process, carry out system's each item protection in real time and detect, if fault is arranged, then carry out the event of failure record, the buzzer warning malfunction indicator lamp shows simultaneously, produces the protection off signal immediately, blocks pwm pulse output, the shutdown protection; Perhaps hand off main circuit artificially, shutdown is protected.

Claims (7)

1. a twin-stage two way convertor is characterized in that: comprise dc circuit breaker, DC filter, DC/DC converter, DC/AC converter, alternating current filter, A.C. contactor I, A.C. contactor II, isolating transformer, AC circuit breaker, DC/DC PWM drive circuit, DC/AC PWM drive circuit, control board and man-machine interface;
Wherein, the input of said DC filter is connected with batteries via dc circuit breaker; The low-pressure end of said DC/DC converter links to each other with the output of DC filter, and high-pressure side links to each other with the low-pressure end of DC/AC converter; The input of said alternating current filter links to each other with the high-pressure side of DC/AC converter, and output links to each other with the A.C. contactor II with A.C. contactor I parallel with one another respectively;
The low-pressure end of said isolating transformer links to each other with the output of A.C. contactor I, A.C. contactor II respectively, and high-pressure side is connected with electrical network via ac bus with after AC circuit breaker links to each other;
Said control board comprises DC/DC control board and DC/AC control board, and the DC/DC control board links to each other with the DC/DCPWM drive circuit; The DC/AC control board links to each other with DC/AC PWM drive circuit; This control board is connected with man-machine interface through the CAN bus.
2. a kind of twin-stage two way convertor according to claim 1 is characterized in that said DC/DC converter is formed in parallel by three buck translation circuits.
3. a kind of twin-stage two way convertor according to claim 1 is characterized in that, said man-machine interface is provided with liquid crystal display, control button and indicator light; Said control button comprise reset, cancellation, menu and button is set, said indicator light comprises power lights, operation display lamp, transmission, accepting state lamp and fault display lamp.
4. according to claim 1 or 3 described a kind of twin-stage two way convertors, it is characterized in that said man-machine interface also is provided with the fault detect and warning display module.
5. a kind of twin-stage two way convertor according to claim 4 is characterized in that, said man-machine interface is provided with operation monitoring and shows, the output voltage electric current and the DC bus-bar voltage electric current of batteries carried out monitoring display.
6. the control method of the said twin-stage two way convertor of claim 1 is characterized in that, may further comprise the steps:
Step 1, startup twin-stage two way convertor are provided with basic parameter through man-machine interface, and said basic parameter comprises bound, communication modes and the filtering mode of charging and discharging of accumulator electric current maximum permissible value, charging/discharging voltage;
The mode of operation of step 2, selection two way convertor, said mode of operation comprises battery charging pattern and batteries discharge mode; Systematic sampling carries out the passage self check, if fault-free, then the closed A.C. contactor II of elder generation judges whether line voltage connects normally again, if connect normally then closed A.C. contactor I;
The pwm pulse modulation program of step 3, startup DC/AC converter; Detect the dc bus side voltage of DC/AC converter in real time, whether the dc bus side voltage of judging the DC/AC converter simultaneously judges batteries terminal voltage whether more than or equal to 25V more than or equal to 620V; If; Then dc circuit breaker is closed, starts the pwm pulse modulation program of DC/DC converter, and the realization batteries is carried out charge or discharge; If not then dc circuit breaker is in off-state;
Step 4, detect the electric current and the voltage of batteries in real time, when batteries is full of or discharge off promptly reaches and discharges and recharges upper lower limit value, the two way convertor power cut-off.
7. control method according to claim 6 is characterized in that: in the said step 3, DC/AC converter and DC/DC converter are independently controlled, and wherein, the pwm pulse modulated process of DC/AC converter is specific as follows:
Steps A: the dc voltage to the DC/AC converter is sampled, and obtains feedback signal U Cd
Step B: with the voltage given signal With dc voltage feedback signal U CdDifference carry out that PI regulates and amplitude limit, as the input of harmonic wave detection module, to guarantee the stable of dc voltage;
Step C: foreign current transducer CT gathers the AC side three-phase current signal i of DC/AC converter a, i b, i cDeliver to the harmonic wave detection module, this module will utilize the ip-iq method to extract harmonic current The harmonic compensation current i that need provide as the given of hysteresis regulator and DC/AC converter Ca, i Cb, i CcCompare, the difference that obtains is respectively through hysteresis regulator 1, hysteresis regulator 2, hysteresis regulator 3, and output produces the drive signal of circuit as SPWM, and then controls the pulse output of DC/AC converter; The pwm pulse modulated process of said DC/DC converter is specific as follows:
Step a, dc low-voltage side voltage, the electric current of DC/DC converter are sampled, obtain feedback voltage, current signal U d, i d
Step b, with the voltage given signal With dc voltage feedback signal U dDifference after subtracting each other is as the input of PID adjuster 1; With the given signal of electric current With DC side electricity current feedback signal i dDifference after subtracting each other is as the input of PID adjuster 2; Respectively amplitude limit is carried out in the output of PID adjuster 1 and PID adjuster 2; Value behind the amplitude limit produces circuit through EPWM again and produces the input of pwm signal as DC/DC PWM drive circuit, through the level conversion of DC//DC PWM drive circuit and then the pulse output of control DC/DC converter.
CN201210334342.8A 2012-09-11 2012-09-11 Two-level two-direction current transformer and control method thereof CN102843060B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248013A (en) * 2013-05-10 2013-08-14 温州大学 Current transformer current-limiting protection system control device and current-limiting control method thereof
CN103684007A (en) * 2013-12-15 2014-03-26 贵阳航空电机有限公司 Static converter
CN104600775A (en) * 2014-12-09 2015-05-06 许继电气股份有限公司 Storage battery activation grid-connected discharging device
CN105811547A (en) * 2016-03-24 2016-07-27 上海先拓电子有限公司 High-power and high-voltage DC charging device
CN106208745A (en) * 2016-08-08 2016-12-07 上海交通大学 CUT output current ripple frequency multiplication and modulating system
CN106772105A (en) * 2017-02-28 2017-05-31 大连奇辉计算机网络有限公司 A kind of PWM controls the detecting device for storage battery of timing discharging
CN109149554A (en) * 2018-08-29 2019-01-04 微控物理储能研究开发(深圳)有限公司 Flywheel energy storage two stage power transformation system and control method
CN110063008A (en) * 2016-10-28 2019-07-26 三菱电机株式会社 Power-converting device and limitation of high harmonics device
CN110912231A (en) * 2019-12-04 2020-03-24 阳光电源股份有限公司 Method and system for judging disconnection of storage battery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050184594A1 (en) * 2004-02-20 2005-08-25 Fredette Steven J. Electric storage augmentation of fuel cell response to AC system transients
CN201349185Y (en) * 2008-12-10 2009-11-18 胡浩 Self-regulated building generating system utilizing solar energy
CN101969281A (en) * 2010-10-14 2011-02-09 北京四方继保自动化股份有限公司 Coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on co-direct current bus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050184594A1 (en) * 2004-02-20 2005-08-25 Fredette Steven J. Electric storage augmentation of fuel cell response to AC system transients
CN201349185Y (en) * 2008-12-10 2009-11-18 胡浩 Self-regulated building generating system utilizing solar energy
CN101969281A (en) * 2010-10-14 2011-02-09 北京四方继保自动化股份有限公司 Coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on co-direct current bus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
李战鹰等: "大容量电池储能系统 PCS 拓扑结构研究", 《南方电网技术》 *
珠海泰坦科技股份有限公司: "TPCS系列双向变流器/逆变器产品使用说明书(V1.0)", 《百度文库》 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248013A (en) * 2013-05-10 2013-08-14 温州大学 Current transformer current-limiting protection system control device and current-limiting control method thereof
CN103248013B (en) * 2013-05-10 2014-09-17 温州大学 Current transformer current-limiting protection system control device and current-limiting control method thereof
CN103684007A (en) * 2013-12-15 2014-03-26 贵阳航空电机有限公司 Static converter
CN104600775A (en) * 2014-12-09 2015-05-06 许继电气股份有限公司 Storage battery activation grid-connected discharging device
CN104600775B (en) * 2014-12-09 2018-09-21 许继电气股份有限公司 A kind of grid-connected electric discharge device of storage battery activation
CN105811547A (en) * 2016-03-24 2016-07-27 上海先拓电子有限公司 High-power and high-voltage DC charging device
CN106208745A (en) * 2016-08-08 2016-12-07 上海交通大学 CUT output current ripple frequency multiplication and modulating system
CN106208745B (en) * 2016-08-08 2019-10-29 上海交通大学 Plasma cutting machine output current ripple frequency multiplication and modulating system
CN110063008A (en) * 2016-10-28 2019-07-26 三菱电机株式会社 Power-converting device and limitation of high harmonics device
CN106772105A (en) * 2017-02-28 2017-05-31 大连奇辉计算机网络有限公司 A kind of PWM controls the detecting device for storage battery of timing discharging
CN106772105B (en) * 2017-02-28 2019-10-11 大连奇辉计算机网络有限公司 A kind of detecting device for storage battery of PWM control timing discharging
CN109149554A (en) * 2018-08-29 2019-01-04 微控物理储能研究开发(深圳)有限公司 Flywheel energy storage two stage power transformation system and control method
CN110912231A (en) * 2019-12-04 2020-03-24 阳光电源股份有限公司 Method and system for judging disconnection of storage battery

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