CN104348175A - Static synchronous compensator (STATCOM) control system based on digital signal processor (DSP) and control method of STATCOM control system - Google Patents
Static synchronous compensator (STATCOM) control system based on digital signal processor (DSP) and control method of STATCOM control system Download PDFInfo
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- CN104348175A CN104348175A CN201410635252.1A CN201410635252A CN104348175A CN 104348175 A CN104348175 A CN 104348175A CN 201410635252 A CN201410635252 A CN 201410635252A CN 104348175 A CN104348175 A CN 104348175A
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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
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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]
Abstract
The invention provides a static synchronous compensator (STATCOM) control system based on a digital signal processor (DSP). The STATCOM control system is characterized by comprising a signal conditioning circuit unit, a DSP control unit, an industrial control computer unit and a driving circuit unit, wherein DSP control unit is composed of a compensating current detection module and a control and pulse triggering module. A control method of the STATCOM control system comprises the steps of gathering power grid real-time voltage and current information; completing harmonic detection and reactive power calculation according to an instantaneous reactive power theory algorithm; transmitting the result to the DSP control module; controlling the input and removal of the compensating module. The STATCOM control system has the advantages that the control system is simple in device, fast in response speed, precise and reliable in action, and strong in data calculation and data processing capacity.
Description
(1) technical field:
The invention belongs to the control field of STATCOM in system for distribution network of power, particularly a kind of based on DSP (Digital Signal Processing, digital signal processing) STATCOM (Distribution Static Compensator, Static Synchronous Compensator) control system and control method.
(2) background technology:
Power industry, as mainstay of the national economy industry, is the extensive use field of STATCOM.STATCOM can realize the object quickly and smoothly absorbing perception and capacitive reactive power in electric power system, and it has starting without advantages such as impacting, regulate continuously, respond fast, floor space is little.
STATCOM can realize the object quickly and smoothly absorbing perception and capacitive reactive power in electric power system, better can realize the compensation to reactive power, reduce voltage flicker, realize voltage stabilization, the subsynchronous concussion of damping, reduce the imbalance of voltage and current, and for improving quality of power supply etc. in power distribution network, at regulating system voltage, correcting power factors, balanced load, the aspects such as filtering harmonic wave all have very large advantage, and it has starts without impacting, regulate continuously, response fast, the advantages such as floor space is little, become the most promising reactive power compensator at present, develop rapidly in high-voltage large-capacity electric power system, one of important composition parts of flexible AC transmitting system.
Control system is the important component part of STATCOM device, and it directly control the operation of STATCOM.Because STATCOM controlling unit amount of calculation is large, flow process is complicated, required precision is high, so the performance of control system and the control program that adopts are the deciding factors affecting STATCOM compensation effect, its performance by directly affect STATCOM export idle quality, thus affect the user side quality of power supply.In the past SCM Based pulse generating unit due to the processor instruction time of implementation oversize, be difficult to ensure pulse precision, cause the speed of system responses to be subject to obvious impact.Now due to DSP operational capability (TMS320F240 time for each instruction be 50ns) fast, and peripheral functionality in its powerful sheet (3 general purpose timers and 3 full comparing units can produce the PWM ripple in 6 band dead bands, road, 3 single comparing units can produce 3 road PWM ripples), high-precision pulse generation and controlling functions can be realized.
(3) summary of the invention:
The object of the present invention is to provide a kind of STATCOM numerical control system based on DSP and control method thereof, it adopt high performance signal processor and flexibly control technology to obtain high-precision control effects, improve stability and the reliability of STATCOM controller greatly, and from improving the response speed of STATCOM controller to the full extent, ensure that the stable operation of associate power equipment, circuit.
Technical scheme of the present invention: a kind of STATCOM control system based on DSP, is characterized in that it comprises signal conditioning circuit unit, DSP control unit, industrial control computer unit and drive circuit unit; Wherein, described DSP control unit is by offset current detection module and control and pulse-triggered module composition; The input of described offset current detection module is connected with the output of signal conditioning circuit unit, and its output is connected with the input of control and pulse-triggered module; Input and the industrial control computer unit of described control and pulse-triggered module are that two-phase is connected, and its output is connected with the input of drive circuit unit; The break-make of the electronic power switch of the output output drive signal control STATCOM of described drive circuit unit.
Described signal condition unit carries out Real-Time Monitoring according to voltage transformer summation current transformer to the voltage and current of electrical network.
Described offset current detection module is made up of FPGA detection module, completes harmonic analysis and idle calculating by instantaneous reactive power theory.
Described DSP control unit is made up of DSP control module, phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS-232C communication module, A/D sampling module, data storage expansion module and LCD MODULE; Wherein, described phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS485 communication module, A/D sampling module, data storage expansion module, LCD MODULE are connected with the output of DSP control module respectively; Described DSP control module is connected by FPGA detection module with Signal-regulated kinase.
Described DSP control module adopts TMS320LF2407A dsp chip.
Described A/D AD conversion unit adopts MAX502 chip.
Described LCD MODULE can show the real-time data signal of power factor, meritorious and reactive power, voltage, electric current; Described LCD MODULE has the input of manual operation STATCOM compensating module and the touch key-press of excision.
The MAX232 series RS-232C serial port level conversion device that described RS-232C communication module adopts MAXIM company of the U.S. to produce; Described host computer adopts industrial control computer to complete line voltage, electric current, Real time displaying without function signal, and the input of given voltage and current parameter, state modulator adjustment task.
Based on STATCOM control system and a control method thereof of DSP, it is characterized in that it comprises the following steps:
1. idle compensating control of the present invention, adopts the syndeton of plug and play, when not stopping reactive-load compensator running, conveniently can change and damaging submodule, greatly alleviating submodule and damage the impact caused electrical network;
2. gathered the real-time voltage current information of electrical network by above-mentioned said voltage transformer, current transformer, carried out the preliminary conditioning of data by described Signal-regulated kinase;
3. FPGA detection module Main Function completes harmonic detecting and idle calculating by instantaneous reactive power theory algorithm, and send result to described DSP control module, DSP control module detects data according to FPGA detection module, controls input and the excision of described compensating module;
4. the reactive compensation capacity that detects according to FPGA of DSP, DSP can determine to need to drop into or the STATCOOM module of excision;
5. by profibus bus and dsp controller, trigger impulse module is controlled, and trigger drive circuit by the output of PWM, make IGBT device action in inverter, thus the input of control STATCOM or excision, realize the change of compensation capacity.
Operation principle of the present invention: as depicted in figs. 1 and 2:
(1) idle compensating control of the present invention operationally, described voltage transformer, current transformer gather the real-time voltage current information of electrical network, by A/D sample circuit, digital-to-analogue conversion is carried out to current and voltage signals, the preliminary conditioning of data is carried out by described Signal-regulated kinase, and DSP control module is sent into after described FPGA detection module carries out information processing, draw the reactive compensation capacity of electrical network.
(2) reactive compensation capacity carried out as required, DSP control module determines the STATCOM submodule needing to drop into or excise, control signal is sent to Static Var Compensator (STATCOM) by described Profibus bus module, by dsp controller, trigger impulse module is controlled, trigger drive circuit by the output of PWM, make IGBT device action in inverter.Static Var Compensator (STATCOM) then makes concrete input or excision action according to acquisition control signal, completes reactive power compensation, realizes the change of compensation capacity.
(3) above-mentioned idle compensating control is mainly through monitoring the operating state of each monomer module, comprises operating time, load, temperature etc., longevity of service, module that temperature is high is preferentially excised in management, and time of having a rest long module is preferentially cut; Should ensure that each module work is in rated condition simultaneously as far as possible, to give full play to system effectiveness, reduce the stress that device bears.When having monitored the overheated or fault of module, parallel redundancy module should be controlled and this module switches, this module having been excised in time, to ensure the reliability of system.
(4) when electrical network trough, dsp controller control and compensation module cut-out drops into module, can reduce compensation capacity, thus guarantee power factor is steady; When electrical network crest, DSP control module sends instruction, submodule number of increasing input, and ensures the capacity of electric network reactive compensation, can improve power factor.In addition, DSP control module can monitor the service data such as temperature, voltage, electric current of each operation submodule in real time.
(5) when submodule breaks down or damage, controller can judge concrete damage submodule fast according to abnormal data, in time the capacity that this submodule is born is transferred to other submodules, sends instruction afterwards by out of service for this submodule, to change it.Running time of each submodule calculates as an important operational factor and is retained in DSP control module.According to program setting, after group module safety moves to certain hour, can be replaced by idle submodule and run submodule, and keep the balance of each submodule running time as far as possible, make submodule natural wastage degree suitable, so that the useful life of extension device.
FPGA detection module is formed, and completes harmonic analysis and idle calculating by instantaneous reactive power theory.FPGA detection module Main Function completes harmonic detecting and idle calculating by instantaneous reactive power theory algorithm, and send result to described DSP control module, and make DSP mainly carry out concentrated balanced management, FPGA and DSP connection layout as shown in Figure 4.DSP control module (i.e. dsp controller), can calculate and store running time of STATCOM submodule, and selects the submodule that need drop into or excise according to running time.DSP control module can store pre-set programs and computing system parameter, controls input or the excision action of each reactive compensation module via described Profibus bus module.Dsp controller according to program setting, can carry out exchange-column shift operation to STATCOM submodule.DSP control module adopts TMS320LF2407A dsp chip, its fast operation, and precision is high, and band PWM exports, and with host, is communicated by RS-232C with host computer.Operation information can gather to store and shows and carry out FEEDBACK CONTROL by upper computer module.Phase-lacking protective device, overcurrent protective device, over-pressure safety device and temperature protective device.The safe operation of described DSP control module 10 can be protected preferably.Keysheet module, LCD MODULE can monitor the ruuning situation of whole system in real time, point out and operate protective device.
Superiority of the present invention is: 1. hardware unit combines with computer software programming, hardware unit simplicity of design, and software programming is easy-to-understand; 2. adopt the STATCOM numerical control system of DSP, avoid the shortcoming that its traditional control method (as single-chip microcomputer) response speed is slow; 3. coordinated with processor module by A/D sampling module, make the action of STATCOM control system more accurately reliable; 4. utilize DSP data at a high speed to calculate and data-handling capacity, high-precision pulse generation and controlling functions can be realized.
(4) accompanying drawing illustrates:
The overall structure schematic diagram of Fig. 1 a kind of STATCOM control system based on DSP involved by the present invention.
Fig. 2 is a kind of structural representation based on DSP control unit in the STATCOM control system of DSP involved by the present invention.
Fig. 3 is a kind of based on serial port level conversion structural representation in the STATCOM control system of DSP involved by the present invention.
Fig. 4 is a kind of structural representation connected based on FPGA and DSP in the STATCOM control system of DSP involved by the present invention.
(5) embodiment:
Embodiment: a kind of STATCOM control system based on DSP (see Fig. 1), is characterized in that it comprises signal conditioning circuit unit, DSP control unit, industrial control computer unit and drive circuit unit; Wherein, described DSP control unit is by offset current detection module and control and pulse-triggered module composition; The input of described offset current detection module is connected with the output of signal conditioning circuit unit, and its output is connected with the input of control and pulse-triggered module; Input and the industrial control computer unit of described control and pulse-triggered module are that two-phase is connected, and its output is connected with the input of drive circuit unit; The break-make of the electronic power switch of the output output drive signal control STATCOM of described drive circuit unit.
Described signal condition unit carries out Real-Time Monitoring according to voltage transformer summation current transformer to the voltage and current of electrical network.
Described offset current detection module is made up of FPGA detection module, completes harmonic analysis and idle calculating by instantaneous reactive power theory.
Described DSP control unit (see Fig. 2) is made up of DSP control module, phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS-232C communication module, A/D sampling module, data storage expansion module and LCD MODULE; Wherein, described phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS485 communication module, A/D sampling module, data storage expansion module, LCD MODULE are connected with the output of DSP control module respectively; Described DSP control module is connected by FPGA detection module with Signal-regulated kinase.
Described DSP control module adopts TMS320LF2407A dsp chip (see Fig. 2).
Described A/D AD conversion unit adopts MAX502 chip (see Fig. 2).
Described LCD MODULE can show the real-time data signal of power factor, meritorious and reactive power, voltage, electric current; Described LCD MODULE has the input of manual operation STATCOM compensating module and the touch key-press of excision.
MAX232 series RS-232C serial port level conversion device (see Fig. 3) that described RS-232C communication module adopts MAXIM company of the U.S. to produce; Described host computer adopts industrial control computer to complete line voltage, electric current, Real time displaying without function signal, and the input of given voltage and current parameter, state modulator adjustment task.
Based on STATCOM control system and a control method thereof of DSP, it is characterized in that it comprises the following steps:
1. idle compensating control of the present invention, adopts the syndeton of plug and play, when not stopping reactive-load compensator running, conveniently can change and damaging submodule, greatly alleviating submodule and damage the impact caused electrical network;
2. gathered the real-time voltage current information of electrical network by above-mentioned said voltage transformer, current transformer, carried out the preliminary conditioning of data by described Signal-regulated kinase;
3. FPGA detection module Main Function completes harmonic detecting and idle calculating by instantaneous reactive power theory algorithm, and send result to described DSP control module, DSP control module detects data according to FPGA detection module, controls input and the excision of described compensating module;
4. the reactive compensation capacity that detects according to FPGA of DSP, DSP can determine to need to drop into or the STATCOOM module of excision;
5. by profibus bus and dsp controller, trigger impulse module is controlled, and trigger drive circuit by the output of PWM, make IGBT device action in inverter, thus the input of control STATCOM or excision, realize the change of compensation capacity.
Claims (9)
1., based on a STATCOM control system of DSP, it is characterized in that it comprises signal conditioning circuit unit, DSP control unit, industrial control computer unit and drive circuit unit; Wherein, described DSP control unit is by offset current detection module and control and pulse-triggered module composition; The input of described offset current detection module is connected with the output of signal conditioning circuit unit, and its output is connected with the input of control and pulse-triggered module; Input and the industrial control computer unit of described control and pulse-triggered module are that two-phase is connected, and its output is connected with the input of drive circuit unit; The break-make of the electronic power switch of the output output drive signal control STATCOM of described drive circuit unit.
2. a kind of STATCOM control system based on DSP according to claim 1, is characterized in that described signal condition unit carries out Real-Time Monitoring according to voltage transformer summation current transformer to the voltage and current of electrical network.
3. a kind of STATCOM control system based on DSP according to claim 1, is characterized in that described offset current detection module is made up of FPGA detection module, completes harmonic analysis and idle calculating by instantaneous reactive power theory.
4. a kind of STATCOM control system based on DSP according to claim 1, is characterized in that described DSP control unit is made up of DSP control module, phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS-232C communication module, A/D sampling module, data storage expansion module and LCD MODULE; Wherein, described phase-locked loop circuit, phase-lacking protective device, overcurrent protective device, overvoltage protection, temperature protective device, Keysheet module, upper computer module, RS485 communication module, A/D sampling module, data storage expansion module, LCD MODULE are connected with the output of DSP control module respectively; Described DSP control module is connected by FPGA detection module with Signal-regulated kinase.
5. a kind of STATCOM control system based on DSP according to claim 4, is characterized in that described DSP control module adopts TMS320LF2407A dsp chip.
6. a kind of STATCOM control system based on DSP according to claim 4, is characterized in that described A/D AD conversion unit adopts MAX502 chip.
7. a kind of STATCOM control system based on DSP according to claim 4, is characterized in that described LCD MODULE can show the real-time data signal of power factor, meritorious and reactive power, voltage, electric current; Described LCD MODULE has the input of manual operation STATCOM compensating module and the touch key-press of excision.
8. a kind of STATCOM control system based on DSP according to claim 4, is characterized in that the MAX232 series RS-232C serial port level conversion device that described RS-232C communication module adopts MAXIM company of the U.S. to produce; Described host computer adopts industrial control computer to complete line voltage, electric current, Real time displaying without function signal, and the input of given voltage and current parameter, state modulator adjustment task.
9., based on STATCOM control system and a control method thereof of DSP, it is characterized in that it comprises the following steps:
1. the real-time voltage current information of voltage transformer, current transformer collection electrical network, is carried out the preliminary conditioning of data by described Signal-regulated kinase;
2. use instantaneous reactive power theory algorithm to complete harmonic detecting and idle calculating, and send result to described DSP control module, DSP control module detects data according to FPGA detection module, controls input and the excision of described compensating module;
3. the reactive compensation capacity that detects according to FPGA of DSP control module, DSP can determine to need to drop into or the STATCOOM module of excision;
4. by profibus bus and DSP control module, trigger impulse module is controlled, and trigger drive circuit by the output of PWM, make IGBT device action in inverter, thus the input of control STATCOM or excision, realize the change of compensation capacity.
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Cited By (3)
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| CN105048480A (en) * | 2015-08-20 | 2015-11-11 | 广州电力设计院 | Dynamic reactive power compensation device |
| CN110620384A (en) * | 2019-10-22 | 2019-12-27 | 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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