CN103595057A - Control system of chained reactive power compensation device - Google Patents
Control system of chained reactive power compensation device Download PDFInfo
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- CN103595057A CN103595057A CN201310462120.9A CN201310462120A CN103595057A CN 103595057 A CN103595057 A CN 103595057A CN 201310462120 A CN201310462120 A CN 201310462120A CN 103595057 A CN103595057 A CN 103595057A
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Abstract
The invention relates to a control system of a chained reactive power compensation device, and belongs to the technical field of electric energy control. The control system of the chained reactive power compensation device comprises a main controller, a synchronization unit, an optical fiber transmitting and receiving unit and a sub power module controller, wherein the main controller is internally provided with an algorithm unit capable of generating modulation waves and pulse signals and a logic unit so as to drive a power module to turn on or off, thereby realizing control for the overall chained reactive power compensation device. The control system integrates a centralized solution and a distributed solution. In a circumstance that the number of modules is small, the centralized solution is adopted, thereby reducing the number of optical fibers and reducing the cost. In a circumstance that the number of modules is large, the distributed solution is adopted, thereby improving the synchronization quality and having strong flexibility and high expansibility. Meanwhile, a single-module control system can be expanded into a multi-module control system without changing the overall framework.
Description
Technical field
The present invention relates to a kind of control system of chain type reactive power compensator, belong to controlling electric energy technical field.
Background technology
Development along with industrial technology, a large amount of Novel loads are adopted in a large number as industrial arc, electric locomotive, rolling mill, rectifier bridge etc., severe exacerbation the quality of power supply, the equipment of adding various automations, intelligentized complex precise is used has higher requirement to the quality of power supply, improves the focus that the quality of power supply becomes research day by day.The relatively simple typical energy saver of a kind of application form during chain type reactive power compensator, have that volume is little, governing speed faster (<10ms), when line voltage is lower output current influence by voltage not, the advantages such as good Low-voltage characteristic, are paid attention to widely.Formed the chain type reactive power compensator series from several kVar to Mvar levels up to a hundred.Yet, due to chain type reactive power compensator, be that different power model (chain link is otherwise known as) is expanded by cascade system, its calculating scale and module number are closely related.The device that expands to high power capacity from low capacity often needs paired pulses generation framework to change in a large number, and the change of hardware is accompanied by many negative effects such as reliability, standardization, maintainability.
Current pulse generate scheme, exists and concentrates on master control computing system generation scheme, is called for short centralized solution, and is distributed to two kinds of patterns of power model control system generation scheme, is called for short distributing scheme.The advantage of centralized solution is to have reduced issuing of synchronizing signal, reduced the number of fibers between power model and control system, shortcoming is higher to the hardware requirement of host computer system, in the situation that number of modules is more, need to increase greatly hardware spending, be difficult to expand.The advantage of distributing scheme is easily to expand, and shortcoming is to need synchronizing signal to guarantee that the sequential of submodule is consistent, and synchronizing signal is easily interfered, and causes and controls unsuccessfully.
Summary of the invention
The control system that the object of this invention is to provide a kind of chain type reactive power compensator, can only adopt the problem of single control mode to solve the control system of existing chain type reactive power compensator.
The present invention is for solving the problems of the technologies described above the control system that a kind of chain type reactive power compensator is provided, this control system comprises master controller, lock unit, optical fiber transceiving unit and N sub-power model controller, N represents every phase power model number, master controller is connected with each sub-power model controller respectively with optical fiber transceiving unit by lock unit, described master controller comprises algorithm unit and logical block, algorithm unit and logical block parallel join, this control system can adopt centralized and distributing control program
When this control system adopts centralized control program, algorithm unit is according to all pressing algorithm generate 3N road modulation wave signal and sent to logical block, logical block generates 3N road pwm pulse signal according to receiving 3N road modulating wave, then by optical fiber transceiving unit, send respectively generation 3N road pwm pulse signal to corresponding N sub-power model controller, every sub-power model controller receives the pwm pulse signal on each 1 tunnel of the 3 every phases in tunnel, and every sub-power model controller drives corresponding power model to open shutoff according to receiving pwm pulse signal;
When this control system adopts distributing control program, algorithm unit generates 3 road modulation wave signals and is sent to logical block, logical block sends respectively by optical fiber transceiving unit the 3 road modulation wave signals that receive to corresponding N sub-power model controller, every sub-power model controller receives the modulation wave signal on each 1 tunnel of the 3 every phases in tunnel, logical block generates 3 phase synchronization signals and sends every sub-power model controller to by lock unit simultaneously, every sub-power model controller generates pwm pulse signal separately according to the modulation wave signal and 3 phase synchronization signals that receive each 1 tunnel of the 3 every phases in tunnel, the pwm pulse signal that every individual sub-power model controller generates according to self drives corresponding power model to open shutoff.
Described algorithm unit adopts dsp chip as hardware supports, and this algorithm unit is connected with the logical block in master control system by its parallel interface.
Described logical block adopts fpga chip as hardware supports, for gathering external analog amount and input and output amount and being uploaded to algorithm unit.
Described control system when adopting centralized control program, the lock unit conductively-closed in this control system.
On every described sub-power model controller, be all connected with DC bus-bar voltage collection module and over-temperature condition acquisition module.
The computing formula of described phase-shifting carrier wave angle is:
The power submodule quantity that wherein N is every phase, i is sub-power model numbering, scope is from 1 to N.
The invention has the beneficial effects as follows: the control system of chain type reactive power compensator of the present invention comprises master controller, lock unit, optical fiber transceiving unit and sub-power model controller, in master controller, be provided with algorithm unit and the logical block that can generate modulating wave and pulse signal, with driving power module, open shutoff, thereby realize the control of whole chain type reactive power compensator, compatibility of the present invention centralized solution and distributing scheme two schemes.In the situation that number of modules is less, adopt centralized solution, reduce number of fibers, thereby reduce costs, and in the situation that number of modules is more, adopt distributing scheme, improve synchronizing quality, there is stronger flexibility and high scalability.Can expand to multimode from single module control system simultaneously, and without changing general frame.
Accompanying drawing explanation
Fig. 1 is the control system part control hardware functional block diagram of chain type reactive power compensator of the present invention;
Fig. 2 is the operation logic schematic diagram of DSP and FPGA in master controller under centralized solution in the embodiment of the present invention;
Fig. 3 is the operation logic schematic diagram of DSP and FPGA in master controller under distributing scheme in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The control system compatibility of chain type reactive power compensator of the present invention centralized control program and distributing control program, in the situation that number of modules is less, adopt centralized control program, and in the situation that number of modules is more, adopt distributing control program.As shown in Figure 1, the control system of chain type reactive power compensator of the present invention comprises master controller, lock unit, optical fiber transceiving unit and N sub-power model controller, master controller is connected with each sub-power model controller respectively with optical fiber transceiving unit by lock unit, described master controller comprises algorithm unit and logical block, algorithm unit and logical block parallel join.
The algorithm unit of master controller adopts dsp chip, on dsp chip, be provided with RS485 and ethernet interface, for correspondence with foreign country, also be provided with parallel interface, for carrying out parallel communication with the logical block of main controller, in dsp chip, be provided with control algolithm module, by this control algolithm module, calculate the logical block that generates modulating wave and pass to master control system, for centralized solution, the built-in all pressures algorithm of DSP can generate 3N road modulating wave (N is every phase power model quantity), for decentralized model, DSP can generate 3 road modulating waves (each 1 tunnel of every phase).
Master controller logical block adopts fpga chip as hardware supports, be used for the algorithm part that gathers external analog amount and input and output amount and be uploaded to master controller, for centralized solution, the N road modulating wave that fpga chip transmits according to DSP, generate phase shift carrier signal, and by comparing carrier wave and modulating wave, generate N road pwm pulse signal and also pass to sub-power model controller.
Optical fiber transceiving unit adopts fibre optic plate, and the FPGA in master controller communicates to connect by fibre optic plate and sub-power model controller, and lock unit is used under decentralized model for sub-power model controller provides synchronizing signal.
Sub-power model controller is for the collection of DC bus-bar voltage and over-temperature condition information, and be uploaded to master controller, simultaneously, receive the signal that master controller issues, under Centralized Mode, what receive is pulse signal, under decentralized model, what receive is modulation wave signal, under Centralized Mode, sub-power cell controller directly comes driving power module to open shutoff according to pulse, thereby control whole chain type reactive power compensator, under decentralized model, sub-power cell control section is according to modulating wave, and in conjunction with self voltage, adopt Pressure and Control algorithm, generate the modulating wave of this sub-power cell, in conjunction with synchronizing signal, carry out phase-shifting carrier wave, while adopting centralized control, lock unit conductively-closed is fallen.
The control of the subsystems division of labor under hubbed mode
As shown in Figure 2, the DSP of master controller controls for outer voltage control, current inner loop and grading ring is controlled, and wherein outer voltage control is for stablizing the DC bus total voltage of chain type reactive power compensator; It is for controlling the size and Orientation of reactive current that current inner loop is controlled; Grading ring is controlled and is applicable to keep the DC bus-bar voltage of each power model balanced.FPGA in master controller is mainly used in generating phase shift carrier wave and compares generation pwm pulse for modulating wave.Each sub-power model controller for according to pwm pulse, drive IGBT and transportation simulator amount and and quantity of state to master control system.
The control division of labor of the subsystems under decentralized model
As shown in Figure 3, the DSP in master controller controls for outer voltage and current inner loop is controlled, and the FPGA of master controller is mainly used in generating synchronizing signal and transmits modulating wave to each sub-power model.Each sub-power model controller is mainly used in: the synchronizing signal that (1) generates according to the FPGA in master controller generates phase shift carrier wave; (2) Pressure and Control generate separate modulation ripple; (3) phase shift carrier wave and modulating wave are compared to rear generation pwm pulse; (4) according to pwm pulse, drive IGBT; (5) analog quantity collecting and quantity of state are uploaded to master controller.
The application is subsidized by national high-tech research development plan (863 Program) problem, project number: 2012AA050206.
Claims (6)
1. the control system of a chain type reactive power compensator, it is characterized in that, this control system comprises master controller, lock unit, optical fiber transceiving unit and N sub-power model controller, N represents every phase power model number, master controller is connected with each sub-power model controller respectively with optical fiber transceiving unit by lock unit, described master controller comprises algorithm unit and logical block, algorithm unit and logical block parallel join, this control system can adopt centralized and distributing control program
When this control system adopts centralized control program, algorithm unit is according to all pressing algorithm generate 3N road modulation wave signal and sent to logical block, logical block generates 3N road pwm pulse signal according to receiving 3N road modulating wave, then by optical fiber transceiving unit, send respectively generation 3N road pwm pulse signal to corresponding N sub-power model controller, every sub-power model controller receives the pwm pulse signal on each 1 tunnel of the 3 every phases in tunnel, and every sub-power model controller drives corresponding power model to open shutoff according to receiving pwm pulse signal;
When this control system adopts distributing control program, algorithm unit generates 3 road modulation wave signals and is sent to logical block, logical block sends respectively by optical fiber transceiving unit the 3 road modulation wave signals that receive to corresponding N sub-power model controller, every sub-power model controller receives the modulation wave signal on each 1 tunnel of the 3 every phases in tunnel, logical block generates 3 phase synchronization signals and sends every sub-power model controller to by lock unit simultaneously, every sub-power model controller generates pwm pulse signal separately according to the modulation wave signal and 3 phase synchronization signals that receive each 1 tunnel of the 3 every phases in tunnel, the pwm pulse signal that every individual sub-power model controller generates according to self drives corresponding power model to open shutoff.
2. the control system of chain type reactive power compensator according to claim 1, is characterized in that, described algorithm unit adopts dsp chip as hardware supports, and this algorithm unit is connected with the logical block in master control system by its parallel interface.
3. the control system of chain type reactive power compensator according to claim 2, is characterized in that, described logical block adopts fpga chip as hardware supports, for gathering external analog amount and input and output amount and being uploaded to algorithm unit.
4. the control system of chain type reactive power compensator according to claim 1, is characterized in that, described control system when adopting centralized control program, the lock unit conductively-closed in this control system.
5. the control system of chain type reactive power compensator according to claim 3, is characterized in that, on every described sub-power model controller, is all connected with DC bus-bar voltage collection module and over-temperature condition acquisition module.
6. the control system of chain type reactive power compensator according to claim 5, is characterized in that, the computing formula of described phase-shifting carrier wave angle is:
The power submodule quantity that wherein N is every phase, i is sub-power model numbering, scope is from 1 to N.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108008668A (en) * | 2017-11-04 | 2018-05-08 | 国网江西省电力公司电力科学研究院 | A kind of method of the large-scale parallel data sampling control sequential based on DSP-FPGA |
| CN110138013A (en) * | 2019-06-18 | 2019-08-16 | 山东大学 | A kind of novel microgrid structure and control method of parallel cascade converter |
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| CN108008668A (en) * | 2017-11-04 | 2018-05-08 | 国网江西省电力公司电力科学研究院 | A kind of method of the large-scale parallel data sampling control sequential based on DSP-FPGA |
| CN110138013A (en) * | 2019-06-18 | 2019-08-16 | 山东大学 | A kind of novel microgrid structure and control method of parallel cascade converter |
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Effective date of registration: 20221025 Address after: No. 4138, Sunshine Avenue, Xuchang Economic Development Zone, Henan 461000 Patentee after: Henan Xuji Power Electronics Co.,Ltd. Patentee after: XJ ELECTRIC Co.,Ltd. Patentee after: XI'AN XJ POWER ELECTRONICS TECHNOLOGY Co.,Ltd. Address before: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Patentee before: XJ ELECTRIC Co.,Ltd. Patentee before: XI'AN XJ POWER ELECTRONICS TECHNOLOGY Co.,Ltd. |
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