CN114006377A - Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals - Google Patents
Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals Download PDFInfo
- Publication number
- CN114006377A CN114006377A CN202111313825.5A CN202111313825A CN114006377A CN 114006377 A CN114006377 A CN 114006377A CN 202111313825 A CN202111313825 A CN 202111313825A CN 114006377 A CN114006377 A CN 114006377A
- Authority
- CN
- China
- Prior art keywords
- time
- power electronic
- control
- pps
- signals
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A method for realizing synchronous control of a plurality of power electronic devices by adopting PPS signals comprises the following steps: receiving satellite signals or regional absolute clock system signals, synchronizing a clock synchronization device, outputting PPS (pulse per second) timing signals by the clock synchronization device, and generating clock second pulse signals for a power electronic equipment control system to realize the control of the starting time of a plurality of power electronic equipment; the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and synchronizes absolute time of execution of the remote control instructions of the plurality of power electronic equipment according to the time relation between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick; the method has the advantages that the starting point is the remote control command, the synchronous control of the modulation voltage initial phase and the modulation voltage initial amplitude of a plurality of power electronic devices are realized, the control period starting time is synchronous, the stable power and frequency are established for the load when the cluster power electronic devices are off the grid, and the power supply and black start requirements are met.
Description
Technical Field
The invention belongs to the technical field of power electronic control, and particularly relates to a method for realizing synchronous control of multiple power electronic devices by adopting a PPS (pulse-width modulation) signal.
Background
The energy storage converter, the photovoltaic inverter and the fan converter can be divided into a current source type and a voltage source type from the working mode, wherein the current source type is that the converter collects grid-connected voltage and phase-locked outputs controllable current, and the voltage source type is that independent system voltage and frequency are established to supply power for loads. When a plurality of power electronic devices perform cluster control, control instructions, control phases and amplitudes of the plurality of devices are discrete, and each device executes according to own pace, so that the process of establishing voltage control by each device in an off-grid mode is shaken, and a black start process of establishing voltage cannot be realized.
When the energy storage converter, the photovoltaic inverter or the fan converter works in a voltage source type, when cluster equipment is arranged and stable establishment and frequency are required to be established with a large amount of load, higher requirements are put forward on the synchronous control requirements of the power electronic equipment. For distributed new energy power generation power electronic equipment such as an energy storage converter, a photovoltaic inverter, a fan converter and the like, the rated power of the power electronic equipment depends on a distributed power supply or the capacity of the energy storage power supply, so that when synchronous current transformation control needs to be performed on a megawatt or gigawatt converter system in a large-scale new energy power generation system or a large-scale energy storage substation, especially under the scene of starting process of voltage establishment of an off-grid multi-converter equipment system and transient mode switching, dozens or hundreds of converter equipment receive superior remote control and remote regulation instructions and are discrete random time, but the amplitude and phase of the control output of dozens or hundreds of converter equipment are required to achieve us-level precision.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a method for realizing synchronous control of a plurality of power electronic devices by adopting a PPS (pulse per second) signal, which realizes synchronization of the starting time of a control cycle, synchronization of remote control instruction execution and synchronization of the initial phase and amplitude of an off-grid establishing voltage so as to meet the requirements of establishing stable power and frequency for a load when cluster power electronic devices are off-grid and meet power supply requirements and black start requirements.
The invention adopts the following technical scheme.
A method for realizing synchronous control of a plurality of power electronic devices by adopting PPS signals comprises the following steps:
step 1: receiving satellite signals or regional absolute clock system signals, synchronizing a clock synchronization device, continuously outputting PPS (pulse per second) timing signals by the clock synchronization device, and generating clock second pulse signals for a power electronic equipment control system to realize the control of the starting time of a plurality of power electronic equipment;
step 2: the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and synchronizes absolute time of execution of the remote control instructions of the plurality of power electronic equipment according to the time relation between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick;
and step 3: and synchronizing the initial phases of the modulated voltages of the plurality of power electronic devices and enabling the initial amplitudes of the modulated voltages to be consistent.
The step 1 specifically comprises the following steps:
step 1.1, confirming a control starting time and a control period of each power electronic device, and confirming a cluster control system device control period according to the control period of the power electronic devices, wherein the cluster control system is a set formed by N power electronic devices, and N is more than or equal to 2;
step 1.2, all the devices receive PPS (polyphenylene sulfide) time tick signals, and whether the control starting time of each device is deviated from the time when the power electronic device control system receives the PPS time tick signals or not is judged, and the deviation is larger than a set deviation threshold value; if the deviation is larger than the set deviation threshold value, the step 1.3 is carried out, otherwise, the synchronization of the control starting time of all the electronic power equipment is completed;
step 1.3, if the deviation is larger than the set deviation threshold, adjusting the initial control time of the equipment once according to the set adjustment amplitude; and waiting for the next PPS time tick and returning to the step 1.2.
The setting of the deviation threshold in step 1.2 is consistent with the accuracy requirement of control synchronization.
In step 1.3, the adjustment amplitude is one thousandth to one hundredth of the control period of the cluster control system equipment.
The step 2 specifically comprises the following steps:
step 2.1, the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and defines a time zone I and a time zone II according to the time relation between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick signals, wherein the time zone I is a time period within a delta t time range before and after the PPS time tick signals; the time zone II is other time zones except the time zone I, and the delay time of the PPS signal is ignored, wherein delta t is integral multiple of the control cycle of the cluster control system equipment;
step 2.2, determining the time for executing the remote control command according to the time zone in which each power electronic device receives the remote control command, wherein the time span between the time for executing the remote control command by all the power electronic devices is 1 second;
and 2.3, performing delay compensation on the remote control command executed by the remote control command executing equipment one second later.
If the receiving time of the remote control command of the equipment is in the time area II in the step 2, the equipment executes the remote control command at the end time of the time area I after the adjacent next PPS time tick;
if the receiving time of the remote control command of the equipment is in the I area, the equipment executes the remote control command at the end time of the time area I after the next PPS time tick.
In step 2.3, the delay compensation is as follows: the rate of increase of the control instruction amplitude of the device executing the remote control instruction 1 second later is 1 per unit/minute, the frequency is controlled according to the power frequency of 50Hz, the amplitude of the control instruction sent by the device executing the remote control instruction 1 second later is compensated for 1/60 per unit, and the phase compensation is zero.
The step 3 specifically comprises the following steps:
step 3.1, judging whether the power grid is in a non-voltage state, if so, performing step 3.2, and if not, executing step 3.3;
step 3.2, initializing all equipment off-network to establish the phase and amplitude of the modulation voltage, and adjusting the phase and amplitude according to the V/F control mode and the set step length to enable the initial phase of the modulation voltage of all the power electronic equipment to be synchronous and the initial amplitude to be consistent;
and 3.3, initializing all phases and amplitudes of the off-grid established modulation voltage, and starting a voltage control mode to enable the initial phases and the initial amplitudes of the modulation voltage of all the power electronic equipment to be consistent with the initial phases and the initial amplitudes of the voltage of the power electronic equipment control system.
The non-voltage state in step 3.1 may be regarded as a non-voltage state, preferably, if the voltage value is less than or equal to 0.1 of the rated voltage.
The voltage control mode is a droop control mode or a grid-connected control mode.
Drawings
FIG. 1 is a schematic diagram of PPS synchronization control not adopted;
fig. 2 is a flowchart of a method for implementing synchronous control of multiple power electronic devices by using PPS signals according to the present invention;
FIG. 3 is a flow chart of the PPS signal synchronization control start time;
fig. 4 is a schematic diagram of synchronous control of a method for implementing synchronous control of multiple power electronic devices by using PPS signals according to the present invention;
FIG. 5 is a schematic diagram illustrating an unsynchronized control start time;
FIG. 6 is a diagram illustrating the PPS signal synchronization control start time;
FIG. 7 is a flow chart illustrating the timing of remote command execution;
FIG. 8(a) is a schematic diagram illustrating an example of remote command receiving and executing time;
FIG. 8(b) is a schematic diagram of an example of remote command receiving and executing time;
FIG. 8(c) is a schematic diagram of an example of remote command receiving and executing time;
fig. 9 is a flowchart for synchronizing the initial phase and the initial amplitude of the modulated voltage of a plurality of power electronic devices.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Fig. 1 is a schematic diagram of a method for implementing synchronous control of a plurality of power electronic devices by using a PPS signal, as shown in fig. 2, a flowchart of a method for implementing synchronous control of a plurality of power electronic devices by using a PPS signal according to the present invention synchronizes clock synchronization devices by receiving GPS satellite signals, Beidou satellite signals or a regional absolute clock system, outputs PPS signals by the clock synchronization devices, generates time-to-second pulse signals for a power electronic device control system, and implements control start time synchronization of N power electronic devices, where N is greater than or equal to 2.
Step 1: receiving satellite signals or regional absolute clock system signals, synchronizing the clock synchronizer, continuously outputting PPS (pulse per second) timing signals by the clock synchronizer, generating clock second pulse signals for the power electronic equipment control system, and realizing the control of the starting time of a plurality of synchronous power electronic equipment, as shown in a flowchart of the PPS signal synchronous control starting time in fig. 3.
The control start time of the power electronic equipment refers to a start time when the electronic power equipment sends a control command, and is hereinafter referred to as a control start time.
Step 1.1, confirming a control starting time and a control period of each power electronic device, and confirming a cluster control system device control period according to the control period of the power electronic devices, wherein the cluster control system is a set formed by N power electronic devices, and N is more than or equal to 2; the distributed power electronic device is manufactured by different manufacturers, and has different selected crystal oscillators, different control periods and different control period starting moments, as shown in fig. 3. In the process of establishing voltage and frequency in an off-grid synchronization mode, all power electronic equipment needs to be controlled synchronously, namely the control starting time of all the power electronic equipment can be absolutely synchronized, and the occurrence of system instability caused by asynchronous control is avoided, wherein the cluster control system equipment refers to a set formed by N power electronic equipment, and N is larger than or equal to 2. When the equipment is not synchronously controlled at the starting time, due to different device selection and control period design, the multiple equipment is randomly arranged at the starting time, the control starting time of each equipment is confirmed, the control period value of each equipment is confirmed, and the least common multiple or the integral multiple of the least common multiple of the control periods of the equipment is used as the equipment control period of the cluster control system.
Step 1.2, all the devices receive PPS (polyphenylene sulfide) time tick signals, and whether the control starting time of each device is deviated from the time when the power electronic device control system receives the PPS time tick signals or not is judged, and the deviation is larger than a set deviation threshold value; if the deviation is larger than the set deviation threshold value, the step 1.3 is carried out, otherwise, the synchronization of the control starting time of all the electronic power equipment is completed;
each device receives PPS time-setting signals output by the same PPS signal output source, the PPS is pulse-per-second signals, namely, one pulse-per-second signal is sent every 1 second, and the sending frequency of the PPS signals has no influence on the method.
If the control starting time of all the devices is not deviated from the PPS time tick signal or the deviation is less than or equal to the set deviation threshold, the control starting time of all the devices is considered to be synchronous, the deviation threshold depends on the precision requirement of the control synchronization, and preferably, the precision requirement of the control synchronization is 1us level, and the deviation threshold is set to be 1 us;
step 1.3, if the deviation is larger than the set deviation threshold, adjusting the initial control time of the equipment once according to the set adjustment amplitude; and waiting for the next PPS time tick and returning to the step 1.2.
After different equipment receives the PPS time tick signal, the deviation time is synchronously processed according to the PPS time tick signal, in order to avoid step adjustment, the adjustment process is slowly carried out, and the PPS time tick signal is adjusted for a few microseconds or a few milliseconds after every PPS second pulse comes, so that the control starting time of each equipment is synchronized. The adjustment amplitude depends on the control period of the cluster control system device, the adjustment amplitude is one thousandth to one hundredth of the control period of the cluster control system device, for example, if the control period is hundreds of microseconds or milliseconds, the adjustment amplitude is set at microseconds, if the control period is hundreds of milliseconds or milliseconds, the adjustment amplitude is set at milliseconds, and each cluster control system selects according to its own control period. The adjusting amplitude is one thousandth to one hundredth of the control period of the cluster control system equipment.
As shown in fig. 4, which is a schematic diagram of synchronization control of a method for implementing synchronous control of multiple power electronic devices by using a PPS signal according to the present invention, after the processing in step 1, the deviation between the control start time of all devices and the PPS time tick signal is less than or equal to the deviation threshold, that is, the control start time of all devices implements synchronization.
In this embodiment, N is 6, where the communication protocol used by the power electronic device includes ethernet medium/high speed protocol, optical fiber medium/high speed protocol, and serial port medium/high speed protocol. Wherein ethernet medium/high speed protocol: the Ethernet medium adopts a TCP/IP link protocol, and the high-speed protocol is an IEC61850 protocol; fiber medium/high speed protocol: the optical fiber medium adopts multimode glass optical fiber, the transmission rate is 20-40 Mbps, and the high-speed protocol is IEC 60044-8; serial media/high speed protocol: the serial port medium adopts an RS232 interface, the high-speed protocol is a modbus protocol and the like, the figure 5 is a schematic diagram of the unsynchronized control starting time, and the figure 6 is a schematic diagram of the PPS signal synchronous control starting time.
And 2, the power electronic equipment control system sends remote control instructions to the corresponding power electronic equipment, and synchronizes absolute time of execution of the remote control instructions of the plurality of power electronic equipment according to the time relation between the remote control instructions received by each power electronic equipment and adjacent PPS time tick signals.
Sending a remote control instruction corresponding to each device to all the power electronic devices, and determining a time area I and a time area II according to the time relationship between the remote control instruction received by each power electronic device and the PPS time tick signals received by the power electronic device; all the devices receive remote control commands among three continuous PPS time setting signals PPSn-1, PPSn and PPSn + 1. The time length of the three continuous PPS time tick signals comprises time periods in a time range of delta t before and after the time period, and is defined as a time area I; the time interval between two time zones I is defined as time zone II, the time span between the end times of the two time zones I is 1 second, ignoring the PPS signal delay time, where PPSn denotes the nth time tick, n is 2,3,4 … …, and Δ t is an integer multiple of the control period. If the receiving time of a certain remote control instruction of the equipment is in the time zone II, the remote control instruction is executed at the end time of the next time zone I;
if the receiving time of a certain remote control command of the equipment is in the time zone I, the remote control command is not executed near the PPS signal, and the remote control command is executed at the end time of the next time zone I.
Because the ending time of the front time zone I and the back time zone I is exactly equal to 1 second, the initial phase and the initial amplitude of the remote control command executed 1 second later are subjected to delay compensation, and the initial phase and the amplitude of the control command sent by the equipment are increased by compensation generated by delaying 1 second when the remote control command is executed.
Fig. 7 is a flowchart for confirming the execution time of the remote control command, and step 2 specifically includes:
step 2.1, the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and defines a time zone I and a time zone II according to the time relationship between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick signal, namely the time period within the time range of delta t before and after the PPS time tick signal is defined as the time zone I; defining other time as a time area II, and neglecting the PPS signal delay time, wherein delta t is integral multiple of the control period of the cluster control system equipment;
step 2.2, determining the time for executing the remote control command according to the time zone in which each power electronic device receives the remote control command, wherein the time span between the time for executing the remote control command by all the power electronic devices is 1 second;
and 2.3, performing delay compensation on the remote control command executed by the remote control command executing equipment one second later.
If the receiving time of the remote control command of the equipment is in the time area II in the step 2, the equipment executes the remote control command at the end time of the time area I after the adjacent next PPS time tick;
if the time of receipt of the device remote control command is within zone I, the device executes the remote control command at the end of time zone I after the next PPS tick.
In step 2.3, the delay compensation is as follows: the rate of increase of the control instruction amplitude of the device executing the remote control instruction 1 second later is 1 per unit/minute, the frequency is controlled according to the power frequency of 50Hz, the amplitude of the control instruction sent by the device executing the remote control instruction 1 second later is compensated for 1/60 per unit, and the phase compensation is zero.
This embodiment describes three cases of executing remote control commands, where in fig. 8(a), the receiving time of remote control command 1 is in the time region II between PPSn-1 and PPSn, and then the device executes remote control command 1 at the time Δ t after the PPSn time tick, i.e. at the end time of the time region I after the adjacent next PPS time tick; if the receiving time of the remote control command 2 is within the time zone I of the PPSn time tick, the device executes the remote control command 2 at the time of Δ t after the PPSn +1 time tick, that is, the end time of the time zone I after the next PPS time tick; the moment of reception of the remote control command 3 falls within the time zone II between PPSn +1 and PPSn, the device executes the remote control command 3 at the time Δ t after the PPSn +1 time tick, i.e. at the end of the time zone I after the adjacent next PPS time tick. In fig. 8(b) the time of receipt of the remote control commands 1, 2,3 is within the time region II between PPSn-1 and PPSn, then the device executes the remote control commands 1, 2,3 at a time Δ t after the PPSn time tick, i.e. at the end of the time region I after the next PPS time tick. In fig. 8(c), the receiving time of the remote control commands 1, 2,3 is within the time zone I of PPSn, then the device executes the remote control commands 1, 2,3 at the time Δ t after the PPSn +1 time tick, i.e. at the end of the time zone I after the next PPS time tick.
The synchronous execution of the remote control instruction by the plurality of power electronic devices is realized, because the physical channels and protocol protocols of the remote control instruction received by the power electronic devices from the superior control system are different, but the time span of the received remote control instruction is not more than 1 second, namely, the time difference between the device which receives the remote control instruction firstly and the device which receives the remote control instruction finally is not more than 1 second, the design of the method can enable the plurality of power electronic devices to execute the remote control instruction at the same time, as shown in the attached figures 8(b) and 8(c), or the plurality of power electronic devices synchronously execute the remote control instruction in batches at two moments, as shown in the attached figure 8(a), and the phase and amplitude of the control instruction of the device which executes the remote control instruction at the previous second are subjected to delay compensation by a voltage detection means and a compensation means. Specifically, if the rate of increase of the control instruction amplitude of the device executing the remote control instruction 1 second later is 1 per unit/minute and the frequency is controlled at 50Hz power frequency, the amplitude of the control instruction sent by the device executing the remote control instruction 1 second later is compensated 1/60 per unit, and the phase compensation is zero.
as shown in figure 9 of the drawings,
the step 3 specifically comprises the following steps:
step 3.1, judging whether the power grid is in a non-voltage state, if so, performing step 3.2, and if not, executing step 3.3;
step 3.2, initializing all equipment off-network to establish the phase and amplitude of the modulation voltage, and adjusting the phase and amplitude according to the V/F control mode and the set step length to enable the initial phase of the modulation voltage of all the power electronic equipment to be synchronous and the modulation initial amplitude to be consistent;
and 3.3, initializing all phases and amplitudes of the off-grid established modulation voltage, and starting a voltage control mode to enable the initial phases and the initial amplitudes of the modulation voltage of all the power electronic equipment to be synchronous with the initial phases and the initial amplitudes of the voltage of the power electronic equipment control system.
And 3.1, a non-voltage state is obtained, and if the voltage value is less than or equal to 0.1 of the rated voltage, the non-voltage state can be regarded as the non-voltage state.
The voltage control mode is a droop control mode or a grid-connected control mode.
All power electronic devices comprise a system voltage following module, and a control mode of following the system voltage is executed by the system voltage following module.
Compared with the prior art, the method for synchronously controlling the plurality of power electronic devices by adopting the PPS signals has the advantages that the synchronization of the starting time of the control period, the synchronization of the execution of the remote control instruction, the synchronization of the initial phase of the off-grid establishment voltage and the consistency of the amplitude are realized, so that the stable power and frequency for the load are established by the cluster power electronic devices when the cluster power electronic devices are off-grid, and the power supply requirement and the black start requirement are met. By adopting the method, the synchronization of the execution time of the remote control instruction of the multiple devices, the synchronization of the initial time of the control period, the phase synchronization of the established voltage and the consistency of the initial magnitude of the amplitude can be realized according to the PPS signal.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A method for realizing synchronous control of a plurality of power electronic devices by adopting PPS signals is characterized by comprising the following steps:
step 1: receiving satellite signals or regional absolute clock system signals, synchronizing a clock synchronization device, continuously outputting PPS (pulse per second) timing signals by the clock synchronization device, and generating clock second pulse signals for a power electronic equipment control system to realize the control of the starting time of a plurality of power electronic equipment;
step 2: the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and synchronizes absolute time of execution of the remote control instructions of the plurality of power electronic equipment according to the time relation between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick;
and step 3: and synchronizing the initial phases of the modulated voltages of the plurality of power electronic devices and enabling the initial amplitudes of the modulated voltages to be consistent.
2. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 1, wherein:
the step 1 specifically comprises the following steps:
step 1.1, confirming a control starting time and a control period of each power electronic device, and confirming a cluster control system device control period according to the control period of the power electronic devices, wherein the cluster control system is a set formed by N power electronic devices, and N is more than or equal to 2;
step 1.2, all the devices receive PPS (polyphenylene sulfide) time tick signals, and whether the control starting time of each device is deviated from the time when the power electronic device control system receives the PPS time tick signals or not is judged, and the deviation is larger than a set deviation threshold value; if the deviation is larger than the set deviation threshold value, the step 1.3 is carried out, otherwise, the synchronization of the control starting time of all the electronic power equipment is completed;
step 1.3, if the deviation is larger than the set deviation threshold, adjusting the initial control time of the equipment once according to the set adjustment amplitude; and waiting for the next PPS time tick and returning to the step 1.2.
3. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 2, characterized in that:
the setting of the deviation threshold in step 1.2 is consistent with the accuracy requirement of control synchronization.
4. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 2, characterized in that:
in step 1.3, the adjustment amplitude is one thousandth to one hundredth of the control period of the cluster control system equipment.
5. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 1, wherein:
the step 2 specifically comprises the following steps:
step 2.1, the power electronic equipment control system sends a remote control instruction to each corresponding power electronic equipment, and defines a time zone I and a time zone II according to the time relation between the remote control instruction received by each power electronic equipment and the adjacent PPS time tick signals, wherein the time zone I is a time period within a delta t time range before and after the PPS time tick signals; the time zone II is other time zones except the time zone I, and the delay time of the PPS signal is ignored, wherein delta t is integral multiple of the control cycle of the cluster control system equipment;
step 2.2, determining the time for executing the remote control command according to the time zone in which each power electronic device receives the remote control command, wherein the time span between the time for executing the remote control command by all the power electronic devices is 1 second;
and 2.3, performing delay compensation on the remote control command executed by the remote control command executing equipment one second later.
6. The method for realizing synchronous control of a plurality of power electronic devices by adopting the PPS signal as set forth in claim 1 or 5, wherein:
if the receiving time of the remote control command of the equipment is in the time area II in the step 2, the equipment executes the remote control command at the end time of the time area I after the adjacent next PPS time tick;
if the receiving time of the remote control command of the equipment is in the I area, the equipment executes the remote control command at the end time of the time area I after the next PPS time tick.
7. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 1, wherein:
in step 2.3, the delay compensation is as follows: the rate of increase of the control instruction amplitude of the device executing the remote control instruction 1 second later is 1 per unit/minute, the frequency is controlled according to the power frequency of 50Hz, the amplitude of the control instruction sent by the device executing the remote control instruction 1 second later is compensated for 1/60 per unit, and the phase compensation is zero.
8. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 1, wherein:
the step 3 specifically comprises the following steps:
step 3.1, judging whether the power grid is in a non-voltage state, if so, performing step 3.2, and if not, executing step 3.3;
step 3.2, initializing all equipment off-network to establish the phase and amplitude of the modulation voltage, and adjusting the phase and amplitude according to the V/F control mode and the set step length to enable the initial phase of the modulation voltage of all the power electronic equipment to be synchronous and the initial amplitude to be consistent;
and 3.3, initializing all phases and amplitudes of the off-grid established modulation voltage, and starting a voltage control mode to enable the initial phases and the initial amplitudes of the modulation voltage of all the power electronic equipment to be consistent with the initial phases and the initial amplitudes of the voltage of the power electronic equipment control system.
9. The method for realizing the synchronous control of the plurality of power electronic devices by adopting the PPS signals as recited in claim 1, wherein:
the non-voltage state in step 3.1 may be regarded as a non-voltage state, preferably, if the voltage value is less than or equal to 0.1 of the rated voltage.
10. The method for synchronously controlling the plurality of power electronic devices by using the PPS signal as claimed in claim 8, wherein:
the voltage control mode is a droop control mode or a grid-connected control mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313825.5A CN114006377A (en) | 2021-11-08 | 2021-11-08 | Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313825.5A CN114006377A (en) | 2021-11-08 | 2021-11-08 | Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114006377A true CN114006377A (en) | 2022-02-01 |
Family
ID=79928011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111313825.5A Pending CN114006377A (en) | 2021-11-08 | 2021-11-08 | Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114006377A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895383A (en) * | 2010-07-07 | 2010-11-24 | 中国人民解放军国防科学技术大学 | External clock synchronization system and control flow thereof |
| CN102118007A (en) * | 2010-12-14 | 2011-07-06 | 许继集团有限公司 | Electronic mutual inductor synchronization method based on PPS |
| CN102522741A (en) * | 2011-12-02 | 2012-06-27 | 上海电器科学研究院 | Synchronous data acquisition method applied to direct current power grid |
| KR20140084839A (en) * | 2012-12-27 | 2014-07-07 | 성균관대학교산학협력단 | Timing synchronization apparatus, method and system in device to device system |
| CN104682414A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Method for converters to switch from grid-connecting to grid-disconnecting |
| CN109828447A (en) * | 2018-12-26 | 2019-05-31 | 中核控制系统工程有限公司 | A kind of gateway communication data time synchronization method based on FPGA+ARM framework |
| CN112564455A (en) * | 2020-11-13 | 2021-03-26 | 国网新源张家口风光储示范电站有限公司 | Method and system for controlling parallel off-grid operation of multiple energy storage converters |
| CN113608428A (en) * | 2021-07-26 | 2021-11-05 | 中国科学院国家空间科学中心 | Method for realizing synchronization of multi-satellite inter-satellite pulse per second and clock |
-
2021
- 2021-11-08 CN CN202111313825.5A patent/CN114006377A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895383A (en) * | 2010-07-07 | 2010-11-24 | 中国人民解放军国防科学技术大学 | External clock synchronization system and control flow thereof |
| CN102118007A (en) * | 2010-12-14 | 2011-07-06 | 许继集团有限公司 | Electronic mutual inductor synchronization method based on PPS |
| CN102522741A (en) * | 2011-12-02 | 2012-06-27 | 上海电器科学研究院 | Synchronous data acquisition method applied to direct current power grid |
| KR20140084839A (en) * | 2012-12-27 | 2014-07-07 | 성균관대학교산학협력단 | Timing synchronization apparatus, method and system in device to device system |
| CN104682414A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Method for converters to switch from grid-connecting to grid-disconnecting |
| CN109828447A (en) * | 2018-12-26 | 2019-05-31 | 中核控制系统工程有限公司 | A kind of gateway communication data time synchronization method based on FPGA+ARM framework |
| CN112564455A (en) * | 2020-11-13 | 2021-03-26 | 国网新源张家口风光储示范电站有限公司 | Method and system for controlling parallel off-grid operation of multiple energy storage converters |
| CN113608428A (en) * | 2021-07-26 | 2021-11-05 | 中国科学院国家空间科学中心 | Method for realizing synchronization of multi-satellite inter-satellite pulse per second and clock |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102577075B (en) | The controlled in wireless of power network switching devices | |
| US10622811B2 (en) | Stand-alone micro-grid autonomous control system and method | |
| JP2018207776A (en) | Independent operation of multiple grid tied power converters | |
| WO2018153222A1 (en) | Control method for smoothly switching between connection and disconnection of microgrid, based on internal model control | |
| US9419439B2 (en) | Reconnecting a wind power plant to a utility grid | |
| EP2221684B1 (en) | Distributed control system | |
| CN115764987A (en) | Control method, new energy converter and grid-connected power system | |
| US10312694B2 (en) | Mode-based output synchronization using relays and a common time source | |
| CN114006377A (en) | Method for realizing synchronous control of multiple power electronic devices by adopting PPS (pulse-width modulation) signals | |
| CN106647672B (en) | Servo-driver position control synchronous method based on CANopen | |
| JP6827219B2 (en) | Power conversion system, power conversion device | |
| CN107591848B (en) | Droop control method and system | |
| CN105790555A (en) | Synchronous communication method for paralleling intelligent rectifier bridge with regulator | |
| CN105207453A (en) | Driver parallel capacity-expansion method and structure | |
| CN115528740A (en) | Synchronous control method for voltage converted from off-grid to grid-connected | |
| CN111313726B (en) | Current sharing method combining preset bias angle and shared synchronous signal | |
| US20180323726A1 (en) | Initializing virtual oscillator control | |
| Meyers et al. | Time disciplined non-PLL active synchronization for grid forming inverters | |
| CN114244326B (en) | Adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference | |
| Shan et al. | Research on high precision master-slave clock synchronization based on 1588 protocol | |
| US20110285341A1 (en) | Method and device for an induction motor start | |
| CN105634476A (en) | System and method of synchronizing a plurality of different frequency sources into one frequency to output | |
| CN118074171A (en) | Energy storage start-stop control system for station level and control method thereof | |
| CN116632926B (en) | Phase-locked grid-connected method based on communication | |
| JPS5535545A (en) | Digital phase synchronous circuit |
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 |