CN110717625B - Power supply quality optimization method and device and readable storage medium - Google Patents
Power supply quality optimization method and device and readable storage medium Download PDFInfo
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Abstract
The invention discloses a power supply quality optimization method, a device and a readable storage medium, wherein the method comprises the following steps: acquiring the number of power modules connected with a power supply circuit to be optimized; distributing communication addresses for each power module according to the number; the communication addresses of the power modules are different; calculating phase shift angles of the power modules according to the quantity; and controlling the operation of the corresponding power module according to the communication address and the phase shift angle, and optimizing the power supply circuit to be optimized. Communication addresses are automatically distributed to all power modules according to the number of the power modules connected with the power supply circuit to be optimized, and phase shift angles of all the power modules are obtained through calculation according to the number of the power modules, so that automatic control of all the power modules based on the communication addresses and the phase shift angles is finally achieved, and the operation flexibility and the fault tolerance are high.
Description
Technical Field
The present invention relates to the field of power quality improvement technologies, and in particular, to a power supply quality optimization method and apparatus, and a readable storage medium.
Background
With the improvement of living standard of people and the popularization of household appliances, rotating equipment such as motors, compressors and the like and power electronic devices are widely applied, the reactive power demand of the equipment is large, a large amount of high-order harmonic current is generated, and the power factor of the whole power grid is low. Currently, a new three-phase balancing technology capable of effectively solving the above problems is a comprehensive power quality optimization device (MEC), which has the functions of adjusting unbalanced active current and suppressing harmonics while compensating reactive power of a system, and the MEC generally includes a control unit for performing overall control of the device and a power module for generating an expected compensation current through switching on and off (controlled by the control unit) of an IGBT. However, the power modules in the existing MEC can be operated under the control of the control unit only after the addresses are manually set, so that the operation flexibility of the device is low.
Disclosure of Invention
In view of this, the embodiments of the present invention provide a power quality optimization method, apparatus and readable storage medium, so as to solve the problem that the existing power quality comprehensive optimization apparatus has low operation flexibility and fault tolerance.
The embodiment of the invention provides a power supply quality optimization method, which comprises the following steps: acquiring the number of power modules connected with a power supply circuit to be optimized; distributing communication addresses for each power module according to the number; the communication addresses of the power modules are different; calculating phase shift angles of the power modules according to the quantity; and controlling the operation of the corresponding power module according to the communication address and the phase shift angle, and optimizing the power supply circuit to be optimized.
Optionally, controlling the operation of the corresponding power module according to the communication address and the phase shift angle, and optimizing the power supply circuit to be optimized, including: controlling the operation of the corresponding power module according to the phase shift angle; acquiring output current of each power module in real time based on the communication address; and distributing the current to be output of each power module according to the obtained output current of each power module so as to balance the current to be output of each power module.
Optionally, the step of calculating the phase shift angle of each power module according to the number includes: calculating the multiple number of all the power modules according to the number; and calculating the phase shift angle of each power module according to the number and the multiple number.
Optionally, the step of allocating communication addresses to the power modules according to the number includes: acquiring a historical communication address of a power module with the historical communication address; the historical communication address is used as the communication address of the corresponding power module; the communication address is assigned to the power module that does not have the historical communication address.
Optionally, before the step of using the historical communication address as the communication address of the corresponding power module, the method further includes: judging whether all the historical communication addresses are different; when the same historical communication address exists, the same historical communication address is used as the communication address of one of the corresponding power modules, and the other power modules are used as the power modules without the historical communication address.
Optionally, when a power module fails, the electronic control switch arranged on the connecting line of the failed power module and the power supply circuit to be optimized is controlled to be disconnected, and the phase shift angle is recalculated.
Optionally, the number of power modules is at least 3.
The embodiment of the invention also provides a power supply quality optimization device, which comprises: the quantity acquisition module is used for acquiring the quantity of the power modules connected with the power supply circuit to be optimized; the address allocation module is used for allocating communication addresses for the power modules according to the number; the communication addresses of the power modules are different; the phase shift calculation module is used for calculating the phase shift angle of each power module according to the quantity; and the optimizing control module is used for controlling the operation of the corresponding power module according to the communication address and the phase shift angle and optimizing the power supply circuit to be optimized.
The embodiment of the invention provides a power supply quality optimization device, which comprises: the power supply circuit comprises a main control unit coupled with the power supply circuit to be optimized, a plurality of power modules and a plurality of power module control units, wherein each power module is coupled with the power supply circuit to be optimized and used for optimizing the power supply circuit to be optimized, and the power modules are coupled in a one-to-one correspondence manner; the main control unit comprises a memory and a processor, the memory and the processor are in communication connection, the memory is stored with computer instructions, the processor executes the computer instructions, so as to execute the power supply quality optimization method in the first aspect or any implementation manner of the first aspect to control the power supply quality optimization device, and the power module control unit is used for controlling the corresponding power module under the control of the main control unit.
An embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the power supply quality optimization method described in the first aspect or any implementation manner of the first aspect.
The technical scheme provided by the invention has the following advantages:
1. according to the power supply quality optimization method provided by the invention, the communication address is automatically allocated to each power module according to the number of the power modules connected with the power supply circuit to be optimized, and the phase shift angle of each power module is obtained through calculation according to the number of the power modules, so that the automatic control of each power module based on the communication address and the phase shift angle is finally realized, and the operation flexibility and the fault tolerance are high.
2. According to the power supply quality optimization method provided by the invention, when some power modules have the historical communication addresses, the communication addresses are not allocated to the power modules, and the historical communication addresses are used as the communication addresses of the corresponding power modules, so that the communication addresses are allocated only to the power modules without the historical communication addresses, and the communication address allocation efficiency, namely the execution efficiency of the method can be improved.
3. According to the power supply quality optimization method provided by the invention, when a certain module fails, the failed power module can be automatically cut off by controlling the electric control switch arranged on the connecting line of the failed power module and the power supply circuit to be optimized, and meanwhile, the optimization of the power supply circuit with optimization can be continuously performed by recalculating the phase shift angle, so that the fault tolerance of the method is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic hardware structure diagram of a power supply quality optimization device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for optimizing power supply quality according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a step S202 in FIG. 2;
fig. 4 is a schematic block diagram of a power supply quality optimization device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 shows an integrated power quality optimization device according to an embodiment of the present invention, as shown in fig. 1, the integrated power quality optimization device includes: the system comprises a main control unit, a plurality of power modules and a plurality of power module control units.
The main control unit is connected with the power supply circuit to be optimized, and as shown in fig. 1, the main control unit can comprise a network side current sampling module and a network side voltage sampling module which are respectively used for collecting the current and the voltage of the power supply circuit; the main control unit may further include an inductor current detection module for detecting an optimized current of the power modules (a total optimized current of all the power modules), and a communication module for communicating with the communication module in each power module control unit.
As shown in fig. 1, each power module is connected with a power supply circuit to be optimized, and the power modules are connected in parallel. An electric control switch is arranged between each power module and the power supply circuit to be optimized, taking the power module 1 in fig. 1 as an example, the electric control switch QF1 in fig. 1 is the electric control switch between the power module and the power supply circuit to be optimized, and the on-off of the electric control switch of each power module is controlled by a main control unit, so that when one power module fails, the main control unit can cut off the failed power module from the whole device by controlling the corresponding electric control switch; in addition, a precharge circuit is further disposed between each power module and the power supply circuit to be optimized, taking the power module 1 as an example, the contactor KM1 and the resistor R1 in fig. 1 are precharge circuits of the power module, specifically, when the whole device is powered on, the contactor KM1 is closed, the switch QF1 is opened, the resistor R1 limits the charging current of the capacitor C1, so as to protect the capacitor C1, and when the charging process of the capacitor C1 is finished, the main control unit controls the contactor KM1 to be opened, and controls the electric control switch QF1 to be closed, so that the power module enters the circuit optimizing stage.
As shown in fig. 1, each power module is provided with a corresponding power module control unit, which may include: the system comprises an output current detection and protection module, a bus voltage detection module and a communication module, wherein the output current detection and protection module and the bus voltage detection module are respectively used for detecting the output current and voltage of a corresponding power module, the communication module is communicated with the communication module of the main control unit according to a communication address distributed by the main control unit and used for receiving a control instruction of the main control unit and sending the output current and voltage of the corresponding power module detected (through the output current detection and protection module and the bus voltage detection module) to the main control unit.
Example 1
Fig. 2 shows a flowchart of a power supply quality optimization method according to an embodiment of the present invention, and as shown in fig. 2, the method may include the following steps:
s201: the number of power modules connected with the power supply circuit to be optimized is obtained. Here, the number of power modules is at least 3.
S202: and allocating communication addresses for the power modules according to the quantity. Here, the communication addresses of the power modules are different.
Specifically, the factory numbers of the power modules or the random numbers generated by the power modules randomly (the random numbers generated by the power modules are different) can be obtained first, communication addresses are allocated to the power modules according to a certain sequence (from small to large or from large to small), specifically, the communication addresses can be allocated preferentially according to the factory numbers, and when one or a plurality of factory numbers cannot be successfully obtained, the communication addresses are allocated according to the random numbers. As shown in fig. 1, after the master control unit completes the allocation of the communication address, the communication address is sent to the corresponding power module control unit, so that all the power module control units can communicate with the master control unit in time.
Here, when the power module control unit receives the allocated communication address, the communication address is written into its own nonvolatile memory.
S203: and calculating the phase shift angle of each power module according to the quantity.
Here, the number of the multiple power modules is calculated according to the number, and then the phase shift angle of each power module is calculated according to the number and the multiple number, specifically, the relationship between the multiple number and the number of the power modules is determined by the specific structure of the power modules, which is not limited herein. Taking the power modules shown in fig. 1 as an example, when the number N of the power modules is 8, the number N of the multiple power modules is 56, and when the number N of the multiple power modules is 56, the phase shift angle calculation formula of each power module (relative to the previous power module) needs to be phase-shifted is shown as follows: θ= (N-1) 2pi+.n, (where θ is the phase shift angle that each power module needs to shift), the phase shift angle between each power module is calculated to be 45 °, i.e. the first power module does not shift, the second shifts 45 °, the third shifts 90 °, and so on.
S204: and controlling the operation of the corresponding power module according to the communication address and the phase shift angle, and optimizing the power supply circuit to be optimized.
Here, step S204 may include the steps of:
step A: and controlling the operation of the corresponding power module according to the phase shift angle.
And (B) step (B): and acquiring the output current of each power module in real time based on the communication address. Here, as shown in fig. 1, the output current of each power module is obtained by detecting the output current in the corresponding power module control unit and detecting the protection module.
Step C: and distributing the current to be output of each power module according to the obtained output current of each power module so as to balance the current to be output of each power module. Here, as shown in fig. 1, the main control unit may also calculate the maximum current that the device can output according to the number of the power modules, so as to serve as a basis for current limiting and overcurrent protection.
According to the power supply quality optimization method, communication addresses are automatically distributed to all power modules according to the number of the power modules connected with the power supply circuit to be optimized, and the phase shift angles of all the power modules are obtained through calculation according to the number of the power modules, so that automatic control of all the power modules based on the communication addresses and the phase shift angles is finally achieved, and the operation flexibility and the fault tolerance are high.
As an optional implementation manner of the embodiment of the present invention, the power supply quality optimization method may further include:
step S205: when one power module fails, the electric control switch arranged on the connecting line of the failed power module and the power supply circuit to be optimized is controlled to be disconnected, and the phase shift angle is recalculated. When a new phase shift angle is calculated, the operation of the corresponding power module is controlled according to the new phase shift angle, and the power supply circuit to be optimized is optimized. The number of power modules remaining after the failed power module is disconnected is also at least 3, and when the number is less than 3, the whole power supply quality optimization device is controlled to stop running.
Here, as shown in fig. 1, when there is a power module that is disconnected and cut due to a fault, the maximum current that can be output by the device is calculated by the number of power modules that are not faulty and remain in the main control unit, which is used as a basis for current limiting and overcurrent protection.
In the embodiment of the invention, when a certain module fails, the failed power module can be automatically cut off by controlling the electric control switch arranged on the connecting line of the failed power module and the power supply circuit to be optimized, and meanwhile, the optimization of the power supply circuit with optimization can be continuously carried out by recalculating the phase shift angle, so that the fault tolerance of the method is improved.
As an alternative implementation of the embodiment of the present invention, as shown in fig. 3, step S202 may include the following steps:
s301: a historical communication address of a power module having a historical communication address is obtained. Here, the history communication addresses are stored in the nonvolatile memories of the corresponding power module control units, as shown in fig. 1, when the device is powered on, the main control unit instructs each power module control unit to send the stored history communication addresses to the main control unit, so that the acquisition of the history communication addresses of the power modules with the history communication addresses is realized.
S302: and taking the historical communication address as the communication address of the corresponding power module.
S303: and judging whether all the historical communication addresses are different. When the same history communication address exists, step S304 is performed; when all the history communication addresses are different, step S305 is directly performed.
S304: the same historical communication address is used as the communication address of one of the corresponding power modules, and the other power modules are used as the power modules without the historical communication address.
S305: the communication address is assigned to the power module that does not have the historical communication address. The specific allocation method of the communication address can be understood with reference to step S202, and will not be described herein.
In the embodiment of the invention, when some power modules have the historical communication addresses, the communication addresses are not allocated to the power modules, but the historical communication addresses are used as the communication addresses of the corresponding power modules, so that the communication address allocation efficiency can be improved only for the power modules without the historical communication addresses, namely the execution efficiency of the method is improved.
Example 2
Fig. 4 shows a schematic block diagram of a power quality optimization device according to an embodiment of the present invention, which may be used to implement the power quality optimization method according to embodiment 1 or any alternative embodiment thereof. As shown in fig. 4, the apparatus includes: the system comprises a quantity acquisition module 10, an address allocation module 20, a term and phase shift calculation module 30 and an optimization control module 40.
The number acquisition module 10 is used for acquiring the number of power modules connected with the power supply circuit to be optimized.
The address allocation module 20 is configured to allocate communication addresses to the power modules according to the number. Here, the communication addresses of the power modules are different.
The term and phase shift calculation module 30 is used for calculating term and phase shift angles of the power modules according to the quantity.
The optimization control module 40 is used for controlling the operation of the corresponding power module according to the communication address and the phase angle of the term and phase, and optimizing the power supply circuit to be optimized.
The embodiment of the invention also provides a power supply quality optimizing device, the structure of which is shown in figure 1, the device comprises a main control unit coupled with a power supply circuit to be optimized, a plurality of power modules and a plurality of power module control units, each power module is coupled with the power supply circuit to be optimized and used for optimizing the power supply circuit to be optimized, and the power modules are coupled in a one-to-one correspondence manner; the main control unit includes a memory and a processor, the memory and the processor are in communication connection with each other, the memory stores computer instructions, the processor executes the computer instructions, thereby executing the power supply quality optimization method described in any one implementation manner of embodiment 1 or embodiment 1 to control the power supply quality optimization device, and the power module control unit is used for controlling the corresponding power module under the control of the main control unit. What has already been stated is not described in detail here.
The specific details of the power supply quality optimization device can be correspondingly understood by referring to the corresponding related descriptions and effects in the embodiments shown in fig. 2 to 3, and will not be repeated here.
It will be appreciated by those skilled in the art that implementing all or part of the above-described embodiment method may be implemented by a computer program to instruct related hardware, where the program may be stored in a computer readable storage medium, and the program may include the above-described embodiment method when executed. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. The power supply quality optimization method is characterized by comprising the following steps of:
acquiring the number of power modules connected with a power supply circuit to be optimized;
allocating communication addresses for the power modules according to the number; the communication addresses of the power modules are different;
calculating phase shift angles of the power modules according to the quantity;
controlling the operation of the corresponding power module according to the communication address and the phase shift angle, optimizing the power supply circuit to be optimized,
wherein the step of allocating communication addresses to the power modules according to the number includes:
acquiring a historical communication address of a power module with the historical communication address;
the historical communication address is used as the communication address of the corresponding power module;
a power module without a historical communication address is assigned a communication address,
in addition, before the step of using the historical communication address as the communication address of the corresponding power module, the method further includes:
judging whether all the historical communication addresses are different;
when the same historical communication address exists, the same historical communication address is used as the communication address of one of the corresponding power modules, and the other power modules are used as the power modules without the historical communication address.
2. The power supply quality optimization method according to claim 1, wherein the step of optimizing the power supply circuit to be optimized by controlling the operation of the corresponding power module according to the communication address and the phase shift angle includes:
controlling the operation of the corresponding power module according to the phase shift angle;
acquiring output current of each power module in real time based on the communication address;
and distributing the current to be output of each power module according to the obtained output current of each power module so as to balance the current to be output of each power module.
3. The power supply quality optimization method according to claim 1 or 2, characterized in that the step of calculating the phase shift angle of each of the power modules from the number comprises:
calculating the multiplex number of all the power modules according to the number;
and calculating the phase shift angle of each power module according to the number and the multiplexing number.
4. The power supply quality optimization method according to claim 1 or 2, characterized by further comprising:
when one power module fails, the power module is controlled to be disconnected from an electric control switch arranged on a connecting line of the power supply circuit to be optimized, and the phase shift angle is recalculated.
5. The power quality optimization method according to claim 1 or 2, characterized in that the number of power modules is at least 3.
6. A power supply quality optimizing apparatus for implementing the power supply quality optimizing method according to claim 1, characterized by comprising:
the quantity acquisition module is used for acquiring the quantity of the power modules connected with the power supply circuit to be optimized;
the address allocation module is used for allocating communication addresses for the power modules according to the number; the communication addresses of the power modules are different;
the phase shift calculation module is used for calculating the phase shift angle of each power module according to the quantity;
and the optimizing control module is used for controlling the operation of the corresponding power module according to the communication address and the phase shift angle and optimizing the power supply circuit to be optimized.
7. A power supply quality optimizing apparatus, characterized by comprising:
the power module control unit is coupled with the power supply circuit to be optimized, each power module is coupled with the power supply circuit to be optimized and used for optimizing the power supply circuit to be optimized, and the power modules are coupled with the power modules in a one-to-one correspondence manner;
the main control unit comprises a memory and a processor, the memory and the processor are in communication connection, the memory stores computer instructions, the processor executes the computer instructions to control the power supply quality optimizing device by executing the power supply quality optimizing method in claim 1 or 2, and the power module control unit is used for controlling the corresponding power module under the control of the main control unit.
8. A computer-readable storage medium storing computer instructions for causing the computer to execute the power supply quality optimization method according to claim 1 or 2.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186518A (en) * | 2015-09-16 | 2015-12-23 | 江苏振光电力设备制造有限公司 | Integrated optimization system of electric energy quality of power distribution network |
| CN106711991A (en) * | 2016-12-23 | 2017-05-24 | 长园深瑞继保自动化有限公司 | Power supply module and distribution method for distributing power freely |
| EP3267316A1 (en) * | 2016-07-08 | 2018-01-10 | Delta Electronics (Shanghai) Co., Ltd. | Recording method and recording apparatus of power module |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186518A (en) * | 2015-09-16 | 2015-12-23 | 江苏振光电力设备制造有限公司 | Integrated optimization system of electric energy quality of power distribution network |
| EP3267316A1 (en) * | 2016-07-08 | 2018-01-10 | Delta Electronics (Shanghai) Co., Ltd. | Recording method and recording apparatus of power module |
| CN106711991A (en) * | 2016-12-23 | 2017-05-24 | 长园深瑞继保自动化有限公司 | Power supply module and distribution method for distributing power freely |
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