CN112909994B - Unbalanced input and output control method for three-phase inverter - Google Patents
Unbalanced input and output control method for three-phase inverter Download PDFInfo
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- CN112909994B CN112909994B CN202110085760.7A CN202110085760A CN112909994B CN 112909994 B CN112909994 B CN 112909994B CN 202110085760 A CN202110085760 A CN 202110085760A CN 112909994 B CN112909994 B CN 112909994B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The invention relates to a three-phase inverter unbalanced input/output control method, which is characterized in that the control method is used for adjusting the power given value of a three-phase inverter by respectively adopting the steps of redetermining the power limit value of each phase, increasing the power limit value of each phase and determining the power limit value of an alternating current side through PI control based on the judging result on the basis of the magnitude relation between the power sampling value and the total power sampling value of each phase of a judging three-phase ammeter and preset power threshold values, and further carrying out the limiting of the power limit value of each phase so as to realize the control of the three-phase inverter. The invention can realize three-phase unbalanced input and output control on the inverter, thereby improving the quality of the power grid, avoiding electric energy waste, bringing greater economic benefit to single-phase charging users and realizing the backflow prevention of each phase of the three-phase power grid.
Description
Technical Field
The invention belongs to the technical field of power conversion, and particularly relates to a method for unbalanced input and output control of a three-phase energy storage/grid-connected inverter, which is suitable for the industry of three-phase photovoltaic inverters.
Background
Solar energy is a clean energy source with high quality, and the core of solar power generation is a photovoltaic inverter. The normal three-phase photovoltaic inverter generation, or the energy storage inverter charging from the grid, is performed in a balanced mode (balanced mode refers to equal power per phase), and the three-phase power is either all output or all input. However, the balance mode is not beneficial to improving the quality of the power grid, and in general, the voltage of the three-phase power grid cannot be balanced absolutely, the load of each phase cannot be equal, the load of each phase of the three-phase power grid is unbalanced, and when the inverter balance output can cause the energy surplus of the phase with small load, the voltage rises; when the inverter balances and absorbs the energy of the power grid, the energy of the phase with large load is possibly insufficient, the voltage is reduced, the quality of the power grid is affected, and the balance of the three-phase power grid is not facilitated. In addition, in the balance mode, the user for single-phase charging of the ammeter is uneconomical, many power grid companies adopt single-phase charging, the buying price is higher than the selling price, and in the balance mode, when the total input and output power is 0, the situation that electricity is bought by the A phase and sold by the B phase exists, and the economy is uneconomical.
Therefore, if the inverter adopts an unbalanced mode to input and output, the advantages are that:
(1) The output power of each phase can be determined according to the spontaneous self-use of the load, so that the power of each phase and the total power input and output of the three phases at the electric meter end can reach about 0w, and the single-phase charging is more economical;
(2) According to the safety requirements of a power grid, such as over-voltage and under-voltage curves, the output and input power is determined, and the unbalanced function can realize that the output power of each phase is adjusted according to the voltage of each phase;
(3) When the three-phase power grid is unbalanced in power consumption, the phase energy with light load can be transferred to the phase with large power consumption load, and the phase energy is realized without the participation of photovoltaic and battery energy;
(4) By receiving the energy scheduling instruction to determine the output/input power of each phase, direct scheduling can be realized.
Disclosure of Invention
The invention aims to provide a three-phase inverter unbalanced input/output control method which can improve the quality of a power grid, avoid electric energy waste and bring economic benefit to users.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the unbalanced input and output control method of the three-phase inverter is used for controlling the three-phase inverter, a three-phase ammeter is arranged between the three-phase inverter and a power grid, and the unbalanced input and output control method of the three-phase inverter comprises the following steps:
step 1: presetting a first power threshold M and a second power threshold N, wherein M is more than N;
step 2: judging whether each phase of power sampling value of the three-phase ammeter meets that each phase of power sampling value is smaller than-MW, if so, re-determining the power limit value of each phase based on the minimum value in each phase of power sampling value, further limiting the power limit value of each phase to adjust the power given value of the three-phase inverter, and if not, executing step 3;
step 3: judging whether each phase power sampling value of the three-phase ammeter meets that each phase power sampling value is smaller than-NW, if so, increasing the power limit value of each phase, further carrying out each phase power limit value limiting to adjust the power given value of the three-phase inverter, and if not, executing the step 4;
step 4: judging whether the total power sampling value of the three-phase ammeter is greater than 0, if so, determining a power given reference value of each phase based on the power sampling value of each phase of the three-phase ammeter and the total power sampling value, executing step 5, and if not, obtaining an alternating current side power limit value of the three-phase inverter through PI control, and further performing limiting of the power limit value of each phase to adjust the power given value of the three-phase inverter;
step 5: and obtaining an alternating-current side power limit value of the three-phase inverter based on the alternating-current side power sampling value of the three-phase inverter and the total power sampling value of the three-phase ammeter through PI control, and further carrying out limiting of the power limit value of each phase to adjust the power given value of the three-phase inverter.
The unbalanced input/output control method of the three-phase inverter further comprises a preliminary step before the step 1, wherein the preliminary step is as follows: and judging whether the three-phase inverter enables a three-phase unbalanced function, and if the three-phase unbalanced function of the three-phase inverter is enabled, continuing to execute the step 1.
And setting a dynamic detection zone bit used for representing whether the three-phase unbalanced function of the three-phase inverter is enabled, and judging whether the three-phase unbalanced function of the three-phase inverter is enabled by utilizing the dynamic detection zone bit.
In the step 2, the method for determining the power limit value of each phase is as follows: and subtracting the maximum value in the power sampling value of each phase of the three-phase ammeter from the current power limit value of each phase, thereby obtaining new power limit values of each phase respectively.
In the step 4, the method for determining the power given reference value of each phase is as follows: and subtracting the total power sampling value/3 from each phase power sampling value of the three-phase ammeter so as to obtain a power given reference value of each phase.
In the step 5, the total power sampling value of the three-phase ammeter is subtracted from the alternating-current side power sampling value of the three-phase inverter, and the alternating-current side power limit value of the three-phase inverter is obtained through PI control.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can realize three-phase unbalanced input and output control on the inverter, thereby improving the quality of the power grid, avoiding electric energy waste, bringing greater economic benefit to single-phase charging users and realizing the backflow prevention of each phase of the three-phase power grid.
Drawings
Fig. 1 is a schematic diagram of an application scenario of the unbalanced input/output control method of the three-phase inverter.
Fig. 2 is a flowchart of the unbalanced input/output control method of the three-phase inverter according to the present invention.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
Embodiment one: as shown in fig. 1, the solar power generation system comprises a solar cell PV, a single/three-phase grid-connected inverter, a three-phase energy storage inverter, an energy storage battery and the like, wherein the single/three-phase grid-connected inverter and the three-phase energy storage inverter are connected with a power grid AC, and a three-phase ammeter CT is arranged between the three-phase inverter (comprising the three-phase grid-connected inverter and the three-phase energy storage inverter) and the power grid, so that three-phase power and total power can be detected respectively.
For the above system, its operating state is divided into the following cases (Pa, pb, pc below represent the power of ABC three phases, prefixed with "+" or no prefixed represents the output to the grid, "-" represents the input from the grid to the inverter device):
1. the three phases are in an output state, the three-phase output power is respectively +Pa, +Pb, pc, pa, pb and Pc are respectively arbitrary values (0 is allowed, equivalent to the phase not working), and the sizes of the three phases can be completely different;
2. the three phases are in an input state, the three-phase output power is respectively-Pa, -Pb, -Pc, pa, pb and Pc are respectively any value (0 is allowed and equivalent to the phase not working), and the sizes of the three phases can be completely different;
3. the three phases are in a one-phase output two-phase input state, the three-phase input and output power combination is (Pa, -Pb, -Pc) or (-Pa, -Pb, pc), the Pa, the Pb and the Pc are respectively any value (0 is allowed and equivalent to the phase is not operated), and the sizes of the three-phase input and output power combination can be completely different;
4. the three phases are in a two-phase output-one-phase input state, the three-phase input-output power combination is (-Pa, pb, pc) or (Pa, -Pb, pc) or (Pa, pb, -Pc), the Pa, pb and Pc are respectively any value (allowed to be 0 and equivalent to the phase not working), and the sizes of the three-phase input-output power combination can be completely different.
For the system, unbalanced input and output can be realized through a control algorithm, and the input and output power control can be controlled according to the electricity consumption condition of each phase, or according to characteristic information such as voltage frequency of a power grid, or the like, or the regulation requirement, or the centralized dispatching of the power grid, or the dispatching of other controllers.
As shown in fig. 2, a three-phase inverter unbalanced input/output control method for controlling a three-phase inverter, which may be adopted by the above system, includes the following steps:
the preparation steps are as follows: and judging whether the three-phase inverter enables a three-phase unbalanced function. If the three-phase unbalanced function of the three-phase inverter is not enabled, gradually increasing the power limit value of each phase to restore to the rated power limit value, and outputting three-phase power in a balanced manner; if the three-phase unbalance function of the three-phase inverter is enabled, the step 1 is continuously executed, and a three-phase unbalance control method is entered.
In the preliminary step, a dynamic detection flag bit for indicating whether the three-phase unbalanced function of the three-phase inverter is enabled may be set, and then whether the three-phase unbalanced function of the three-phase inverter is enabled may be determined using the dynamic detection flag bit.
Step 1: the first power threshold M and the second power threshold N are preset, M is larger than N, and M, N are positive numbers.
Step 2: and judging whether each phase of power sampling value of the three-phase ammeter meets that each phase of power sampling value is smaller than-MW.
If the power limit value is met, the three-phase power is purchased from the power grid, and at the moment, a quick recovery method is provided, the power limit value of each phase is redetermined based on the minimum value in the power sampling value of each phase, and then the power limit value of each phase is limited to adjust the power given value of the three-phase inverter. The method for determining the power limit value of each phase is as follows: the current power limit value of each phase is subtracted by the maximum value in the power sampling value of each phase of the three-phase ammeter (the maximum value is the minimum value of the absolute value because the power sampling value of each phase of the three-phase ammeter is negative), so that the power limit value of each new phase is obtained respectively, and the balance of the power of one phase is recovered quickly.
If not, executing the step 3.
Step 3: and judging whether each phase of power sampling value of the three-phase ammeter meets the condition that each phase of power sampling value is smaller than-NW.
If the power limit disturbance is met, the power limit disturbance is increased, the power limit of each phase is increased to the rated power limit, the influence on MPPT of the three-phase inverter is prevented, and then the power limit amplitude limit of each phase is carried out to adjust the power set value of the three-phase inverter.
If not, executing the step 4.
Step 4: and judging whether the total power sampling value of the three-phase ammeter meets the condition that the total power sampling value is larger than 0.
If the power is satisfied, the power can be used for grid-connected power generation or stir-frying and charging of an energy storage battery, the unbalanced three-phase power of each phase is not needed to be realized by using the power, so that the power is required to be evenly distributed to the three phases to be used as a power given reference value, the power given reference value of each phase is determined based on the power sampling value and the total power sampling value of each phase of the three-phase ammeter, and step 5 is executed. The method for determining the power given reference value of each phase comprises the following steps: and subtracting the total power sampling value/3 from each phase power sampling value of the three-phase ammeter so as to obtain the power given reference value of each phase.
If the power limit value does not meet the power limit value, the power limit value of the alternating current side of the three-phase inverter is obtained directly through PI control, and then limiting of the power limit value of each phase is carried out to adjust the given power value of the three-phase inverter.
Step 5: the method comprises the steps of obtaining an alternating-current side power limit value of the three-phase inverter based on an alternating-current side power sampling value Pac of the three-phase inverter and a total power sampling value of the three-phase ammeter through PI control, namely subtracting the total power sampling value of the three-phase ammeter from the alternating-current side power sampling value of the three-phase inverter, obtaining the alternating-current side power limit value of the three-phase inverter through PI control, and further carrying out limiting of the power limit value of each phase according to a given reference value of power of each phase to adjust a given power value of the three-phase inverter. As the active control value of unbalanced input and output of each phase, scheduling is performed according to an inverter internal power control algorithm.
Through the steps, finally, the input and output control of the three-phase inverter is realized through the adjustment of the power given value of the three-phase inverter, and the unbalanced input and output function is realized. The method is an automatic energy adjustment management method, is suitable for application scenes of three-phase power grid charging respectively, improves the quality of the power grid, avoids electric energy waste, and brings greater economic benefit to single-phase charging users compared with the balanced input and output modes of the traditional three-phase inverter. The anti-countercurrent of each phase of the three-phase power grid can be realized.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (6)
1. The unbalanced input and output control method of the three-phase inverter is used for controlling the three-phase inverter, the three-phase inverter is a light Fu Sanxiang inverter or an energy storage three-phase inverter, and a three-phase ammeter is arranged between the three-phase inverter and a power grid, and is characterized in that: the unbalanced input and output control method of the three-phase inverter comprises the following steps:
step 1: presetting a first power threshold M and a second power threshold N, wherein M is more than N;
step 2: judging whether each phase of power sampling value of the three-phase ammeter meets that each phase of power sampling value is smaller than-MW, if so, re-determining the power limit value of each phase based on the minimum value in each phase of power sampling value, further limiting the power limit value of each phase to adjust the power given value of the three-phase inverter, and if not, executing step 3;
step 3: judging whether each phase power sampling value of the three-phase ammeter meets that each phase power sampling value is smaller than-NW, if so, increasing the power limit value of each phase, further carrying out each phase power limit value limiting to adjust the power given value of the three-phase inverter, and if not, executing the step 4;
step 4: judging whether the total power sampling value of the three-phase ammeter is greater than 0, if so, determining a power given reference value of each phase based on the power sampling value of each phase of the three-phase ammeter and the total power sampling value, executing step 5, and if not, obtaining an alternating current side power limit value of the three-phase inverter through PI control, and further performing limiting of the power limit value of each phase to adjust the power given value of the three-phase inverter;
step 5: the power limiting method comprises the steps of obtaining an alternating-current side power limit value of the three-phase inverter through PI control based on an alternating-current side power sampling value of the three-phase inverter and a total power sampling value of the three-phase ammeter, and further carrying out limiting of each phase of power limit value to adjust a power given value of the three-phase inverter;
in the step 2 and the step 3, "-" represents input from the power grid to the three-phase inverter.
2. The unbalanced input/output control method of the three-phase inverter according to claim 1, wherein: the unbalanced input/output control method of the three-phase inverter further comprises a preliminary step before the step 1, wherein the preliminary step is as follows: and judging whether the three-phase inverter enables a three-phase unbalanced function, and if the three-phase unbalanced function of the three-phase inverter is enabled, continuing to execute the step 1.
3. The unbalanced input/output control method of the three-phase inverter according to claim 2, wherein: and setting a dynamic detection zone bit used for representing whether the three-phase unbalanced function of the three-phase inverter is enabled, and judging whether the three-phase unbalanced function of the three-phase inverter is enabled by utilizing the dynamic detection zone bit.
4. A three-phase inverter unbalanced input/output control method according to any one of claims 1 to 3, characterized in that: in the step 2, the method for determining the power limit value of each phase is as follows: and subtracting the maximum value in the power sampling value of each phase of the three-phase ammeter from the current power limit value of each phase, thereby obtaining new power limit values of each phase respectively.
5. A three-phase inverter unbalanced input/output control method according to any one of claims 1 to 3, characterized in that: in the step 4, the method for determining the power given reference value of each phase is as follows: and subtracting the total power sampling value/3 from each phase power sampling value of the three-phase ammeter so as to obtain a power given reference value of each phase.
6. A three-phase inverter unbalanced input/output control method according to any one of claims 1 to 3, characterized in that: in the step 5, the total power sampling value of the three-phase ammeter is subtracted from the alternating-current side power sampling value of the three-phase inverter, and the alternating-current side power limit value of the three-phase inverter is obtained through PI control.
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| CN114583722B (en) * | 2022-05-07 | 2022-09-02 | 深圳市德兰明海科技有限公司 | Ammeter balance control method and device, electronic equipment and system |
| CN114844065A (en) * | 2022-05-17 | 2022-08-02 | 浙江艾罗网络能源技术股份有限公司 | Three-phase unbalanced output control method and system thereof |
| CN117155103A (en) * | 2023-08-28 | 2023-12-01 | 浙江艾罗网络能源技术股份有限公司 | Inverter power control method and related equipment thereof |
| CN117277512B (en) * | 2023-11-14 | 2024-04-09 | 深圳市德兰明海新能源股份有限公司 | Self-adaptive charging power adjusting method of three-phase energy storage system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795826A (en) * | 2015-04-15 | 2015-07-22 | 西安理工大学 | Operation control method for combined three-phase inverter |
| CN108493966A (en) * | 2018-04-24 | 2018-09-04 | 东北大学 | A kind of micro-capacitance sensor uncompensated load control method and device based on virtual synchronous technology |
| CN109510221A (en) * | 2018-11-29 | 2019-03-22 | 国网安徽省电力有限公司滁州供电公司 | The device and method of three-phase imbalance adjustment based on power information acquisition system |
Family Cites Families (1)
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795826A (en) * | 2015-04-15 | 2015-07-22 | 西安理工大学 | Operation control method for combined three-phase inverter |
| CN108493966A (en) * | 2018-04-24 | 2018-09-04 | 东北大学 | A kind of micro-capacitance sensor uncompensated load control method and device based on virtual synchronous technology |
| CN109510221A (en) * | 2018-11-29 | 2019-03-22 | 国网安徽省电力有限公司滁州供电公司 | The device and method of three-phase imbalance adjustment based on power information acquisition system |
Non-Patent Citations (1)
| Title |
|---|
| 基于储能技术的不平衡负载下光伏并网控制系统研究;孟彦京;杜鹃;马汇海;;陕西科技大学学报(第05期);全文 * |
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