CN104348175B - A kind of STATCOM control system and its control method based on DSP - Google Patents
A kind of STATCOM control system and its control method based on DSP Download PDFInfo
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- CN104348175B CN104348175B CN201410635252.1A CN201410635252A CN104348175B CN 104348175 B CN104348175 B CN 104348175B CN 201410635252 A CN201410635252 A CN 201410635252A CN 104348175 B CN104348175 B CN 104348175B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- 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]
Abstract
A kind of STATCOM control system based on DSP, it is characterised in that it includes signal conditioning circuit unit, DSP control unit, industrial control computer unit and drive circuit unit；Wherein, the DSP control unit is made up of compensation current detection module and control and pulse-triggered module；Its control method includes：Power network real-time voltage current information is gathered, harmonic detecting and idle calculating are completed by instantaneous reactive power theory algorithm, and result is sent to described DSP control module, controls input and the excision of the compensating module；It is advantageous in that：Device is simple；Fast response time；Action is accurate reliable；Data calculate and data-handling capacity is strong.
Description
(1) technical field：
The invention belongs to the control field of STATCOM in system for distribution network of power, particularly one kind to be based on DSP
STATCOM (Distribution Static Compensator, the Static of (Digital Signal Processing, digital signal processing)
Synchronous Compensator) control system and its control method.
(2) background technology：
Power industry is the extensive use field of STATCOM as mainstay of the national economy industry.It is static same
Step compensator can be realized in power system quickly and smoothly absorbs perception and the purpose of capacitive reactive power, and it, which has, starts
Without impact, the advantages that regulation is continuous, response quickly, small floor space.
STATCOM can be realized in power system quickly and smoothly absorbs perception and the purpose of capacitive reactive power, can
Preferably to realize the compensation to reactive power, reduce voltage flicker, realize voltage stabilization, damp subsynchronous concussion, reduce electricity
Pressure and electric current imbalance, and its in power distribution network be used for improve quality of power supply etc., regulating system voltage, corrected power because
Number, balanced load, filter out harmonic wave etc. and be respectively provided with very big advantage, and it have start without impact, regulation is continuous, response
Quickly, the advantages that floor space is small, most promising reactive power compensator is turned at present, in high-voltage large-capacity power system
Rapid development, is one of important composition part of flexible AC transmitting system.
Control system is the important component of STATCOM device, and it directly control STATCOM operation.Due to
STATCOM controlling units are computationally intensive, and flow is complicated, and required precision is high, so the performance of control system and used control
Scheme is to influence the deciding factor of STATCOM compensation effects, and its performance exports idle matter by STATCOM is directly affected
Amount, so as to influence the user terminal quality of power supply.SCM Based pulse generating unit was due to the processor instruction execution time in the past
It is oversize, it is difficult to ensure pulse precision, cause the speed that system responds by obvious influence.Now due to DSP is quick
Operational capability (TMS320F240 time for each instructions are 50ns), and peripheral functionality (3 general purpose timers in its powerful piece
PWM ripple of 6 tunnels with dead band can be produced with 3 full comparing units, 3 single comparing units can produce 3 road PWM ripples) so that high accuracy
Pulse generation and control function can realize.
(3) content of the invention：
It is an object of the invention to provide a kind of STATCOM numerical control systems and its control method based on DSP, it is adopted
With high performance signal processor and flexible control technology to obtain high-precision control effect, greatly improve
The stability and reliability of STATCOM controllers, and from the response speed for improving STATCOM controllers to the full extent, ensure
The stable operation of associate power equipment, circuit.
Technical scheme：A kind of STATCOM control system based on DSP, it is characterised in that it is adjusted including signal
Manage circuit unit, DSP control unit, industrial control computer unit and drive circuit unit；Wherein, the DSP controls are single
Member is made up of compensation current detection module and control and pulse-triggered module；The input and letter of the compensation current detection module
The output end connection of number modulate circuit unit, its output end are connected with the input of control and pulse-triggered module；The control
And the input of pulse-triggered module is connected with industrial control computer unit in two-phase, its output end and drive circuit unit
Input connects；The output end output drive signal control STATCOM of drive circuit unit electronic power switch leads to
It is disconnected.
The signal condition unit is supervised in real time according to voltage transformer summation current transformer to the voltage and current of power network
Survey.
The compensation current detection module is made up of FPGA detection modules, and harmonic wave is completed by instantaneous reactive power theory
Analysis and idle calculating.
The DSP control unit by DSP control module, phase-locked loop circuit, phase-lacking protective device, overcurrent protection,
Overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS-232C communication modules, A/D sampling modules,
Data storage expansion module and LCD MODULE are formed；Wherein, the phase-locked loop circuit, phase-lacking protective device, overcurrent
Protection device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS485 communication modules, A/D are adopted
Egf block, data storage expansion module, LCD MODULE are connected with the output end of DSP control module respectively；The DSP controls
Molding block is connected with Signal-regulated kinase by FPGA detection modules.
The DSP control module uses TMS320LF2407A dsp chips.
The A/D AD conversion units use MAX502 chips.
The LCD MODULE can show power factor, active and reactive power, voltage, the real time data letter of electric current
Number；The LCD MODULE has the input and the touch key-press of excision of manually operated STATCOM compensating modules.
The RS-232C communication modules use the MAX232 series RS-232C serial port level of MAXIM companies of U.S. production
Switching device；The host computer completes line voltage, electric current, the Real time displaying without function signal using industrial control computer, with
And the input of given voltage current parameters, the task of state modulator regulation.
A kind of STATCOM control system and its control method based on DSP, it is characterised in that it comprises the following steps：
1. idle compensating control of the present invention, using the attachment structure of plug and play, can not stop it is idle
In the case that compensator is run, damage submodule is conveniently changed, greatly mitigates submodule damage shadow to caused by power network
Ring；
2. the real-time voltage current information of power network is gathered by above-mentioned described voltage transformer, current transformer, by institute
The Signal-regulated kinase stated carries out the preliminary conditioning of data；
3. FPGA detection module main functions are to complete harmonic detecting and varmeter by instantaneous reactive power theory algorithm
Calculate, and result is sent to described DSP control module, DSP control module detects data according to FPGA detection modules, controls institute
State input and the excision of compensating module；
4. the reactive compensation capacity that DSP detects according to FPGA, DSP can determine the STATCOOM for needing to put into or cut off
Module；
5. by profibus buses and dsp controller, trigger pulse module is controlled, and the output for passing through PWM
Trigger drive circuit so that IGBT device acts in inverter, so as to control STATCOM input or excision, realizes compensation
The change of capacity.
The operation principle of the present invention：As depicted in figs. 1 and 2：
(1) operationally, described voltage transformer, current transformer gather power network to idle compensating control of the invention
Real-time voltage current information, by A/D sample circuits to current and voltage signals carry out digital-to-analogue conversion, by described signal condition
Module carries out the preliminary conditioning of data, and is sent into DSP control module after described FPGA detection modules carry out information processing, obtains
Go out the reactive compensation capacity of power network.
(2) reactive compensation capacity carried out as needed, DSP control module determine what is needed to put into or cut off
STATCOM submodules, control letter is sent to SVC (STATCOM) by described Profibus bus modules
Number, trigger pulse module is controlled by dsp controller, drive circuit is triggered by PWM output so that in inverter
IGBT device acts.Then according to obtaining, control signal makes specific input to SVC (STATCOM) or excision is dynamic
Make, complete reactive-load compensation, realize the change of compensation capacity.
(3) above-mentioned idle compensating control is mainly by monitoring the working condition of each monomer module, including the working time, negative
Lotus, temperature etc., the high module of longevity of service, temperature is preferentially cut off in management, the time of having a rest module of length is preferentially cut；Together
When should ensure that each module is operated in rated condition as far as possible, to give full play to system effectiveness, reduce the stress that device is born.Work as prison
When having measured module overheat or failure, parallel redundancy module and the module should be controlled to switch over, the module is cut off in time, with
The reliability of guarantee system.
(4) when power network trough, dsp controller control compensating module cut-out input module, it is possible to reduce compensation is held
Amount, so that guarantee power factor is steady；When power network crest, DSP control module sends instruction, submodule number of increasing input
Mesh, ensure the capacity of electric network reactive compensation, power factor can be improved.In addition, DSP control module can monitor each operation in real time
The service datas such as the temperature of submodule, voltage, electric current.
(5) when submodule breaks down or damages, controller can quickly judge specific damage according to abnormal data
Module, is transferred to other submodules by the capacity that this submodule is born in time, send afterwards instruction this submodule is out of service,
To be changed to it.The run time of each submodule operational factor important as one calculates in DSP control module
And it is retained.According to program setting, group module safety was run to certain time, and operation submodule can be replaced by idle submodule
Block, and the balance of each submodule run time is kept as far as possible, make submodule natural wastage degree suitable, so as to making for extension device
Use the life-span.
FPGA detection modules are formed, and frequency analysis and idle calculating are completed by instantaneous reactive power theory.FPGA is detected
Module main function is to complete harmonic detecting and idle calculating by instantaneous reactive power theory algorithm, and sends result to institute
The DSP control module stated, makes DSP be substantially carried out concentration balanced management, and FPGA and DSP connection figures are as shown in Figure 4.DSP controls mould
Block (i.e. dsp controller), it can calculate and store the run time of STATCOM submodules, and need to put into according to run time selection
Or the submodule of excision.DSP control module can store pre-set programs and computing system parameter, via described Profibus buses
Module controls input or the excision action of each reactive compensation module.Dsp controller can be according to program setting, to STATCOM
Submodule is timed switchover operation.DSP control module uses TMS320LF2407A dsp chips, and its arithmetic speed is fast, precision
Height, and exported with PWM, with host, communicated with host computer by RS-232C.Upper computer module can be by operation information
Collect storage display and carry out feedback control.Phase-lacking protective device, overcurrent protective device, over-pressure safety device and temperature protection
Device.The safe operation of described DSP control module 10 can preferably be protected.Keysheet module, LCD MODULE can be real-time
The running situation of whole system is monitored, prompts to operate protection device.
The present invention is advantageous in that：1. hardware unit is combined with computer software programming, hardware unit design is simple,
Software programming is easy-to-understand；2. using DSP STATCOM numerical control systems, its traditional control method (such as monolithic is avoided
Machine) response speed it is slow the shortcomings that；3. coordinating by A/D sampling modules and processor module, make the action of STATCOM control system
It is more accurate reliable；4. utilize the data calculating of DSP high speeds and data-handling capacity so that high-precision pulse generation and control
Function can be realized.
(4) illustrate：
Fig. 1 is a kind of overall structure diagram of the STATCOM control system based on DSP involved by the present invention.
Fig. 2 is the structural representation of DSP control unit in a kind of STATCOM control system based on DSP involved by the present invention.
Fig. 3 is serial port level conversion structural representation in a kind of STATCOM control system based on DSP involved by the present invention
Figure.
Fig. 4 is the structural representation that FPGA is connected with DSP in a kind of STATCOM control system based on DSP involved by the present invention
Figure.
(5) embodiment：
Embodiment：A kind of STATCOM control system based on DSP (see Fig. 1), it is characterised in that it includes signal condition electricity
Road unit, DSP control unit, industrial control computer unit and drive circuit unit；Wherein, the DSP control unit by
Compensate current detection module and control and pulse-triggered module is formed；The input of the compensation current detection module is adjusted with signal
The output end connection of circuit unit is managed, its output end is connected with the input of control and pulse-triggered module；The control and arteries and veins
The input for rushing trigger module is connected with industrial control computer unit in two-phase, the input of its output end and drive circuit unit
End connection；The break-make of the output end output drive signal control STATCOM of drive circuit unit electronic power switch.
The signal condition unit is supervised in real time according to voltage transformer summation current transformer to the voltage and current of power network
Survey.
The compensation current detection module is made up of FPGA detection modules, and harmonic wave is completed by instantaneous reactive power theory
Analysis and idle calculating.
The DSP control unit (see Fig. 2) is by DSP control module, phase-locked loop circuit, phase-lacking protective device, over current protection
Protection unit, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS-232C communication modules, A/D are adopted
Egf block, data storage expansion module and LCD MODULE are formed；Wherein, the phase-locked loop circuit, phase-lacking protective device,
Overcurrent protection, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS485 communication modules,
A/D sampling modules, data storage expansion module, LCD MODULE are connected with the output end of DSP control module respectively；It is described
DSP control module is connected with Signal-regulated kinase by FPGA detection modules.
The DSP control module uses TMS320LF2407A dsp chips (see Fig. 2).
The A/D AD conversion units use MAX502 chips (see Fig. 2).
The LCD MODULE can show power factor, active and reactive power, voltage, the real time data letter of electric current
Number；The LCD MODULE has the input and the touch key-press of excision of manually operated STATCOM compensating modules.
The RS-232C communication modules use the MAX232 series RS-232C serial port level of MAXIM companies of U.S. production
Switching device (see Fig. 3)；The host computer completes line voltage, electric current, without the online of function signal using industrial control computer
It has been shown that, and the input of given voltage current parameters, the task of state modulator regulation.
A kind of STATCOM control system and its control method based on DSP, it is characterised in that it comprises the following steps：
1. idle compensating control of the present invention, using the attachment structure of plug and play, can not stop it is idle
In the case that compensator is run, damage submodule is conveniently changed, greatly mitigates submodule damage shadow to caused by power network
Ring；
2. the real-time voltage current information of power network is gathered by above-mentioned described voltage transformer, current transformer, by institute
The Signal-regulated kinase stated carries out the preliminary conditioning of data；
3. FPGA detection module main functions are to complete harmonic detecting and varmeter by instantaneous reactive power theory algorithm
Calculate, and result is sent to described DSP control module, DSP control module detects data according to FPGA detection modules, controls institute
State input and the excision of compensating module；
4. the reactive compensation capacity that DSP detects according to FPGA, DSP can determine the STATCOOM for needing to put into or cut off
Module；
5. by profibus buses and dsp controller, trigger pulse module is controlled, and the output for passing through PWM
Trigger drive circuit so that IGBT device acts in inverter, so as to control STATCOM input or excision, realizes compensation
The change of capacity.
Claims (6)
1. a kind of STATCOM control system based on DSP, it is characterised in that it includes signal conditioning circuit unit, DSP control lists
Member, industrial control computer unit and drive circuit unit；Wherein, the DSP control unit is by compensation current detection module
Formed with control and pulse-triggered module；The output of the input and signal conditioning circuit unit of the compensation current detection module
End connection, its output end are connected with the input of control and pulse-triggered module；The control and the input of pulse-triggered module
With industrial control computer unit in being bi-directionally connected, the input of its output end and drive circuit unit connects at end；The driving
The break-make of the output end output drive signal control STATCOM of circuit unit electronic power switch；The compensation current detecting
Module is made up of FPGA detection modules, and frequency analysis and idle calculating are completed by instantaneous reactive power theory；The DSP controls
Unit processed is by DSP control module, phase-locked loop circuit, phase-lacking protective device, overcurrent protection, overvoltage protection, temperature
Spend protection device, Keysheet module, upper computer module, RS-232C communication modules, A/D sampling modules, data storage expansion module
Formed with LCD MODULE；Wherein, the phase-locked loop circuit, phase-lacking protective device, overcurrent protection, overvoltage protection
Device, temperature protective device, Keysheet module, upper computer module, RS-232C communication modules, A/D sampling modules, data storage
Expansion module, LCD MODULE are connected with the output end of DSP control module respectively；The DSP control module and signal condition
Circuit unit is connected by FPGA detection modules；
The control method of the control system is：
1. voltage transformer, current transformer gather the real-time voltage current information of power network, by described signal conditioning circuit list
Member carries out the preliminary conditioning of data；
2. completing harmonic detecting and idle calculating with instantaneous reactive power theory algorithm to, and result is sent to described DSP
Control module, DSP control module detect data according to FPGA detection modules, control input and the excision of compensating module；
3. the reactive compensation capacity that DSP control module detects according to FPGA, DSP control module can determine that needs put into or cut
The STATCOM removed；
4. by profibus buses and DSP control module, trigger pulse module is controlled, and touched by PWM output
Send out drive circuit so that IGBT device acts in inverter, so as to control STATCOM input or excision, realizes that compensation is held
The change of amount；
The detailed process of the control method is：
(1) operationally, described voltage transformer, the real-time voltage of current transformer collection power network are electric for idle compensating control
Stream information, digital-to-analogue conversion is carried out to current and voltage signals by A/D sampling modules, carried out by described signal conditioning circuit unit
The preliminary conditioning of data, and DSP control module is sent into after described FPGA detection modules carry out information processing, draw power network
Reactive compensation capacity；
(2) reactive compensation capacity carried out as needed, DSP control module are determined to need the STATCOM for putting into or cutting off, led to
Cross described Profibus bus modules and send control signal to STATCOM, trigger pulse module is entered by DSP control module
Row control, drive circuit is triggered by PWM output so that IGBT device acts in inverter；STATCOM is then according to being controlled
Signal processed makes specific input or excision action, completes reactive-load compensation, realizes the change of compensation capacity；
(3) idle compensating control is by monitoring the working condition of each monomer module, including working time, load, temperature, management
The middle module that longevity of service, temperature is high is preferentially cut off, and the time of having a rest module of length is preferentially cut；Ensure each module work simultaneously
Make in rated condition；When having monitored module overheat or failure, control parallel redundancy module and the module switch over, by this
Module is cut off in time；
(4) when power network trough, DSP control module control compensating module cut-out input module；When power network crest, DSP
Control module sends instruction, submodule number of increasing input；
(5) when submodule breaks down or damages, controller quickly judges specifically to damage submodule according to abnormal data, and
When the capacity that this submodule is born is transferred to other submodules, it is out of service by this submodule to send instruction afterwards, so as to right
It is changed；According to program setting, group module safety was run to certain time, and operation can be replaced by idle submodule
Module, and the balance of each submodule run time is kept as far as possible, make submodule natural wastage degree suitable.
A kind of 2. STATCOM control system based on DSP according to claim 1, it is characterised in that the signal condition electricity
Road unit is monitored in real time according to voltage transformer summation current transformer to the voltage and current of power network.
A kind of 3. STATCOM control system based on DSP according to claim 1, it is characterised in that the DSP control module
Using TMS320LF2407ADSP chips.
A kind of 4. STATCOM control system based on DSP according to claim 1, it is characterised in that the A/D sampling modules
Using MAX502 chips.
A kind of 5. STATCOM control system based on DSP according to claim 1, it is characterised in that the liquid crystal display mode
Block can show power factor, active and reactive power, voltage, the real-time data signal of electric current；The LCD MODULE has
Manually operated STATCOM input and the touch key-press of excision.
A kind of 6. STATCOM control system based on DSP according to claim 1, it is characterised in that the RS-232C communications
Module uses the MAX232 series RS-232C serial port level conversion devices of MAXIM companies of U.S. production；The upper computer module
It is defeated using industrial control computer completion line voltage, electric current, the Real time displaying without function signal, and given voltage current parameters
Enter, the task of state modulator regulation.
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| CN105048480B (en) * | 2015-08-20 | 2018-07-31 | 广州电力设计院 | Dynamic reactive compensation device |
| CN110620384B (en) * | 2019-10-22 | 2021-07-30 | 国网湖南省电力有限公司 | User low voltage management method based on plug-and-play mobile SVC |
| CN111342473A (en) * | 2020-03-03 | 2020-06-26 | 国网江西省电力有限公司电力科学研究院 | Self-adaptive temperature control method for high-voltage chain type STATCOM power module |
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| CN101017982A (en) * | 2007-03-12 | 2007-08-15 | 刘建政 | Light voltage and wind power integrated networking device with the reactive power compensation and harmonious administration function |
| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN102324749A (en) * | 2011-09-08 | 2012-01-18 | 天津理工大学 | STATCOM (Static Compensator) device based on switched system theory and robust control method for same |
| CN103036241B (en) * | 2012-12-15 | 2015-03-04 | 安徽工程大学 | Reactive compensation controller and control method thereof |
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