CN113472180A - PWM carrier synchronization method applied to energy router - Google Patents
PWM carrier synchronization method applied to energy router Download PDFInfo
- Publication number
- CN113472180A CN113472180A CN202110766184.2A CN202110766184A CN113472180A CN 113472180 A CN113472180 A CN 113472180A CN 202110766184 A CN202110766184 A CN 202110766184A CN 113472180 A CN113472180 A CN 113472180A
- Authority
- CN
- China
- Prior art keywords
- voltage module
- pwm
- synchronous
- carrier
- synchronization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- 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
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
Abstract
A PWM carrier synchronization method applied to an energy router is characterized by comprising the following steps: the auxiliary control unit generates a synchronous pulse signal and sends the synchronous pulse signal to the high-voltage module; the high-voltage module receives the signal and converts the signal into a synchronous pulse signal; the high-voltage module updates a PWM carrier counting register to complete the PWM carrier synchronization of the high-voltage module; the high-voltage module encodes the synchronous pulse signal according to an 8B/10B encoding rule to generate a 10Bit synchronous K code byte and sends the 10Bit synchronous K code byte to the low-voltage module; the low-voltage module receives the signal and converts the signal into a synchronous pulse signal; and the low-voltage module updates the PWM carrier counting register to complete the PWM carrier synchronization of the low-voltage module, thereby realizing the PWM full-synchronization function of the system. The invention has the advantages that: the PWM carrier synchronization method applied to the energy router is realized based on an optical fiber communication line, no additional hardware is needed to be added, and the complexity and the cost of the system are reduced on the premise of ensuring the performance of the system.
Description
Technical Field
The invention relates to the technical field of 10kV integrated charging systems, in particular to a PWM carrier synchronization method applied to an energy router.
Background
With the access of a large amount of distributed renewable energy sources, energy storage equipment, electric vehicles and other novel loads in the power grid, the source end and the load end of the power distribution system are enabled to present strong uncertainty. Due to the limitation of open-loop operation conditions, the traditional alternating current power distribution system cannot quickly track and respond to the change of distributed energy output and load, and cannot continuously and accurately adjust power flow, so that the voltage deviation of the system becomes an increasingly prominent problem in power distribution network operation management. The introduction of a direct current power distribution technology and the construction of an energy router-based alternating current and direct current hybrid power distribution system are important means for meeting the challenge. The alternating current-direct current hybrid power distribution system can give full play to the quick response characteristic of the energy router, can greatly reduce the links of electric energy conversion, and can realize quick, flexible, continuous and accurate power and voltage regulation and control of a power distribution network under the condition of strong uncertainty of the source and the load at both ends.
The energy router comprises a front-stage high-voltage module, a rear-stage low-voltage module, a main control unit, a system module and a DAB (digital audio broadcasting) stage, wherein the front-stage high-voltage module of the energy router is connected in series to bear high voltage, the rear-stage low-voltage module is connected in parallel to output high power, the main control unit and the modules are electrically isolated by adopting an optical fiber medium for communication control, if PWM (pulse width modulation) between the system modules is adopted, the time of carrier waves is different, CHB stage grid-connected current contains high-frequency components, and the DAB stage overcurrent condition occurs, so that the PWM carrier waves between the modules synchronously become the key for realizing the function of the energy router. In the traditional optical fiber synchronization method, a mode of adding an additional synchronous signal connecting line is adopted, or an analog circuit is adopted to extract an optical fiber clock to be used as a time base of PWM carrier counting to realize synchronization, and hardware complexity and cost are increased in both methods in a multi-module system.
Disclosure of Invention
The invention provides a PWM carrier synchronization method applied to an energy router, which is realized based on an optical fiber communication line without adding extra hardware and reduces the complexity and cost of a system on the premise of ensuring the performance of the system.
In order to achieve the above object, the present invention provides a PWM carrier synchronization method applied to an energy router, which is characterized by comprising the following steps:
step 1: the auxiliary control unit respectively generates synchronous pulse signals in each CHB carrier phase-shifting PWM period and DAB carrier PWM period, encodes according to an 8B/10B encoding rule to generate 10Bit synchronous K code bytes and sends the bytes to the high-voltage module;
step 2: the high-voltage module receives 10-Bit synchronous K code bytes sent by the auxiliary control unit and converts the bytes into synchronous pulse signals;
and step 3: the high-voltage module updates a PWM carrier counting register to complete the PWM carrier synchronization of the high-voltage module;
and 4, step 4: the high-voltage module encodes the synchronous pulse signal according to the 8B/10B encoding rule to generate 10Bit synchronous K code bytes while performing the step 3, and sends the 10Bit synchronous K code bytes to the low-voltage module;
and 5: the low-voltage module receives the 10Bit synchronous K code byte sent by the high-voltage module and converts the byte into a synchronous pulse signal;
step 6: the low-voltage module updates the PWM carrier counting register to complete the PWM carrier synchronization of the low-voltage module, thereby realizing the PWM full-synchronization function of the system;
the PWM carrier synchronization mode is full synchronization and is three-level synchronization among the auxiliary control unit, the high-voltage module and the low-voltage module.
The auxiliary control unit generates a CHB level required carrier phase shift synchronous pulse signal at the finish time of a CHB carrier phase shift PWM cycle, generates a DAB level required carrier synchronous pulse signal at the finish time of a DAB carrier PWM cycle, and generates a 10Bit synchronous K code byte according to 8B/10B coding and transmits the two synchronous signals to the high-voltage module.
The high-voltage module receives two 10-Bit synchronous K code bytes sent by the auxiliary control unit through the optical fiber, decodes the two 10-Bit synchronous K code bytes and converts the two 10-Bit synchronous K code bytes into corresponding synchronous pulse signals, updates a CHB level carrier phase shift PWM counting register of the high-voltage module and a DAB level carrier PWM counting register of the high-voltage module, and simultaneously generates the 10-Bit synchronous K code bytes by the high-voltage module according to 8B/10B codes and sends the 10-Bit synchronous K code bytes to the low-voltage module.
The low-voltage module receives the 10Bit synchronous K code byte sent by the high-voltage module through the optical fiber, decodes and converts the byte into a corresponding synchronous pulse signal, and updates a DAB (digital audio broadcasting) rear-stage carrier PWM (pulse width modulation) counting register of the low-voltage module.
The invention has the advantages that:
the PWM carrier synchronization method applied to the energy router is realized based on an optical fiber communication line, no additional hardware is needed to be added, and the complexity and the cost of the system are reduced on the premise of ensuring the performance of the system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a control block diagram of an energy router system applied to a PWM carrier synchronization method of an energy router according to the present invention;
FIG. 2 is a flowchart illustrating carrier synchronization control of an energy router system according to the PWM carrier synchronization method of the present invention;
fig. 3 is a carrier synchronization control block diagram of an energy router system applied to a PWM carrier synchronization method of an energy router according to the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings. It should be noted that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
As shown in fig. 1, which is a control diagram of an energy router system, the auxiliary control unit FPGA is responsible for generating a synchronization signal pulse and transmitting a code thereof. The high-voltage module and the low-voltage module are also controlled by the FPGA, and are used for decoding the synchronous signals transmitted by the auxiliary control and synchronously updating the PWM carrier counter.
As shown in fig. 2, which is a flow chart of system synchronization control, the method in fig. 2 is as follows:
step 1: the auxiliary control unit respectively generates synchronous pulse signals in each CHB carrier phase-shifting PWM period and DAB carrier PWM period, encodes according to an 8B/10B encoding rule to generate 10Bit synchronous K code bytes and sends the bytes to the high-voltage module;
specifically, as shown in fig. 3, the auxiliary control unit generates a CHB-stage carrier phase shift PWM synchronization pulse signal when the CHB carrier phase shift period register increments and the count register equals zero, encodes the synchronization pulse signal into a K28.210bit synchronization K-code byte, and transmits the K-code byte to the high-voltage module through an optical fiber. And generating a DAB level carrier PWM synchronous pulse signal at the moment when the DAB carrier period register is increased to the peak value, and coding the synchronous pulse signal into a K28.610bit synchronous K code byte and sending the K code byte to the high-voltage module through an optical fiber.
Step 2: the high-voltage module receives 10-Bit synchronous K code bytes sent by the auxiliary control unit and converts the bytes into synchronous pulse signals;
and step 3: the high-voltage module updates a PWM carrier counting register to complete the PWM carrier synchronization of the high-voltage module;
and 4, step 4: the high-voltage module encodes the synchronous pulse signal according to the 8B/10B encoding rule to generate 10Bit synchronous K code bytes while performing the step 3, and sends the 10Bit synchronous K code bytes to the low-voltage module;
specifically, as shown in fig. 3, the high-voltage module decodes the K-28.210bit synchronous code byte sent by the auxiliary control unit into a CHB-level carrier phase shift PWM synchronous pulse signal and updates a CHB-level carrier phase shift PWM count register value; and the high-voltage module decodes the received K28.610bit synchronous K code byte sent by the auxiliary control unit into a DAB carrier PWM synchronous pulse signal and updates the value of a DAB carrier PWM counting register. Meanwhile, the DAB level carrier PWM synchronous pulse signal is encoded into a K28.610bit synchronous K code byte again and is sent to the low-voltage module through the optical fiber.
And 5: the low-voltage module receives the 10Bit synchronous K code byte sent by the high-voltage module and converts the byte into a synchronous pulse signal;
step 6: the low-voltage module updates the PWM carrier counting register to complete the PWM carrier synchronization of the low-voltage module, thereby realizing the PWM full-synchronization function of the system;
the PWM carrier synchronization method realizes the full synchronization function of the auxiliary control unit, the high-voltage module and the low-voltage module of the energy router system, and ensures the stable operation of the energy router system.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A PWM carrier synchronization method applied to an energy router is characterized by comprising the following steps:
step 1: the auxiliary control unit respectively generates synchronous pulse signals in each CHB carrier phase-shifting PWM period and DAB carrier PWM period, encodes according to an 8B/10B encoding rule to generate 10Bit synchronous K code bytes and sends the bytes to the high-voltage module;
step 2: the high-voltage module receives 10-Bit synchronous K code bytes sent by the auxiliary control unit and converts the bytes into synchronous pulse signals;
and step 3: the high-voltage module updates a PWM carrier counting register to complete the PWM carrier synchronization of the high-voltage module;
and 4, step 4: the high-voltage module encodes the synchronous pulse signal according to the 8B/10B encoding rule to generate 10Bit synchronous K code bytes while performing the step 3, and sends the 10Bit synchronous K code bytes to the low-voltage module;
and 5: the low-voltage module receives the 10Bit synchronous K code byte sent by the high-voltage module and converts the byte into a synchronous pulse signal;
step 6: and the low-voltage module updates the PWM carrier counting register to complete the PWM carrier synchronization of the low-voltage module, thereby realizing the PWM full-synchronization function of the system.
2. The PWM carrier synchronization method applied to the energy router according to claim 1, wherein the PWM carrier synchronization mode is full synchronization, and is three-level synchronization among the auxiliary control unit, the high voltage module and the low voltage module.
3. The PWM carrier synchronization method applied to the energy router of claim 1, wherein the auxiliary control unit generates the CHB level required carrier phase shift synchronization pulse signal at the end of the CHB carrier phase shift PWM cycle and generates the DAB level required carrier synchronization pulse signal at the end of the DAB carrier PWM cycle.
4. The PWM carrier synchronization method applied to the energy router of claim 3, wherein the CHB-level required carrier phase shift synchronization pulse signal and the DAB-level required carrier synchronization pulse signal are generated according to 8B/10B coding, and 10Bit synchronization K code byte is generated by the two synchronization signals and sent to the high voltage module.
5. The PWM carrier synchronization method applied to the energy router of claim 1, wherein the high voltage module receives two 10Bit synchronous K code bytes sent by the auxiliary control unit through the optical fiber, decodes and converts the two bytes into corresponding synchronous pulse signals, and updates the CHB level carrier phase shift PWM count register of the high voltage module and the DAB level carrier PWM count register of the high voltage module.
6. The PWM carrier synchronization method applied to the energy router of claim 5, wherein the high voltage module generates a 10Bit synchronous K code byte by the decoded synchronization pulse signal according to 8B/10B coding and sends the 10Bit synchronous K code byte to the low voltage module.
7. The PWM carrier synchronization method applied to the energy router of claim 1, wherein the low voltage module receives 10Bit synchronous K code bytes sent by the high voltage module through the optical fiber, decodes and converts the received bytes into corresponding synchronous pulse signals, and updates a DAB post-stage carrier PWM count register of the low voltage module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766184.2A CN113472180A (en) | 2021-07-07 | 2021-07-07 | PWM carrier synchronization method applied to energy router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766184.2A CN113472180A (en) | 2021-07-07 | 2021-07-07 | PWM carrier synchronization method applied to energy router |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113472180A true CN113472180A (en) | 2021-10-01 |
Family
ID=77878750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110766184.2A Withdrawn CN113472180A (en) | 2021-07-07 | 2021-07-07 | PWM carrier synchronization method applied to energy router |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113472180A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116827155A (en) * | 2023-06-28 | 2023-09-29 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
-
2021
- 2021-07-07 CN CN202110766184.2A patent/CN113472180A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116827155A (en) * | 2023-06-28 | 2023-09-29 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
| CN116827155B (en) * | 2023-06-28 | 2024-02-20 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111740450B (en) | PWM carrier synchronization method applied to direct-hanging type 10kV charging station | |
| CN111600501B (en) | PWM carrier synchronization method applied to power electronic transformer | |
| CN102263496B (en) | Power equalizing control method for multi-module DC-DC (Direct Current-Direct Current) convertor | |
| CN106655846B (en) | Modularized multi-level converter control system and control method | |
| CN103501059B (en) | Field coupled formula energy signal walks abreast wireless transmitting system | |
| CN103269177A (en) | Distributed ISOP inverter and input voltage sharing and output same-amplitude control method thereof | |
| CN104218951A (en) | Semiconductor device and semiconductor device operating method | |
| CN102751895A (en) | Multi-level circuit, grid-connected inverter and modulation method of grid-connected inverter | |
| CN103825278A (en) | Power quality control | |
| CN113472180A (en) | PWM carrier synchronization method applied to energy router | |
| CN104377945A (en) | Reference signal generating circuit and method thereof | |
| CN104993694A (en) | Input voltage sharing control method of modularized combined direct-current converter | |
| CN202841143U (en) | 40GE CFP optical module compatible with LR4 and ER4 | |
| CN111211679A (en) | High-power high-transformation-ratio high-voltage direct-current converter for space and photovoltaic power generation system | |
| CN113794373B (en) | Multi-level direct current converter and power supply system | |
| US10389267B2 (en) | Single-stage three-phase power supply conversion device and power line transmission device | |
| CN103516241B (en) | A kind of modular i SOS inverter system | |
| US11356035B2 (en) | Power transmitting apparatus for code modulation and power receiving apparatus for code demodulation | |
| CN203466764U (en) | Parallel control system based on cascaded high-voltage frequency converter load distribution | |
| CN112217401A (en) | Magnetic isolation power supply communication scheme based on digital modulation technology for electric energy meter | |
| CN204131381U (en) | Reference signal generating circuit and switching power supply circuit | |
| KR102309184B1 (en) | Power conversion system including a plurality of multilevel power conversion modules and operation method therefor | |
| US11539284B2 (en) | DC conversion system and control method thereof | |
| CN115037365A (en) | High-speed expandable encoder of high-power free space optical communication system | |
| Mohamad et al. | Simulation analysis of an improved cascaded multilevel inverter topology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211001 |