CN116207753A - Electric wire netting primary frequency modulation system that possesses reactive power balance and compensation regulatory function - Google Patents
Electric wire netting primary frequency modulation system that possesses reactive power balance and compensation regulatory function Download PDFInfo
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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Abstract
The invention belongs to the technical field of wind power grid control, and particularly relates to a grid primary frequency modulation system with reactive power balance and compensation regulation functions. The overall control system includes: the system comprises a frequency modulation control system, an energy storage array management unit, a compensation control system, a gain power control system and a gain power reduction control system; the power grid is a wind power grid, comprising: wind turbine generator system, energy storage array and generating line, wind turbine generator system and energy storage array are connected with the generating line. The invention realizes the balance of compensation by setting the power control system with mutually coupled gain and attenuation so as to avoid the situation of overcompensation or insufficient compensation, and simultaneously completes primary frequency modulation under the condition of less acquisition parameters by using a new algorithm when the primary frequency modulation is carried out, and simultaneously optimizes and automatically controls the energy storage of the wind power network, thereby having the advantage of high intelligent degree.
Description
Technical Field
The invention belongs to the technical field of wind power grid control, and particularly relates to a grid primary frequency modulation system with reactive power balance and compensation regulation functions.
Background
In recent years, new energy power generation represented by wind power is rapidly developed, the proportion of the new energy to the installed capacity of a power grid is larger and larger, and as the wind power and photovoltaic proportion in a local power grid is continuously increased, ultra-high voltage direct current power transmission is gradually put into operation, the power grid operation and structure are more and more complicated, and the power balance and frequency modulation difficulty of a power system are continuously increased. The power grid is a real-time dynamic load, the power generation and the load must be kept in a dynamic balance state, when the power generation is larger than the load, the frequency is increased, and the power needs to be reduced; when the power generation is smaller than the load, the frequency is reduced, and the power needs to be increased. At present, the wind generating set realizes decoupling control of a power generation system and a power grid through a fast-controlled power electronic variable-current and variable-frequency device, but the power output of the wind generating set is irrelevant to the power grid state, is only relevant to resources and scheduling, lacks fast response and active supporting capability to the system frequency, and does not have primary frequency modulation capability of a conventional generating set. The increase of the new energy power generation proportion tends to reduce the installation proportion of the conventional fire and water motor sets, the primary frequency modulation capacity proportion in the system is reduced, and the influence on the frequency safety of the power grid is caused, so that the frequency modulation capability of the new energy power station is urgently needed to be excavated, and the 'power grid friendly' wind power generation control technology with the primary frequency modulation capability is researched.
With the change of the grid source structure of the power system and the continuous progress of the wind power technology, the participation of primary frequency modulation becomes the technical performance of wind power grid connection. Currently, management of wind farm power control systems is generally divided into three layers: the wind power plant performs control and communication of wind power plant operation data with a power grid dispatching part through a common power system protocol (such as DL/T104 and the like). The power control and communication of the wind power plant and the wind turbine generator are performed through the SCADA system, and the power instruction issued by the power grid department is issued to the wind turbine generator for execution through the SCADA system after being converted through an OPC protocol.
According to response time and duration of frequency modulation, the frequency modulation of the power system can be divided into inertia response (natural frequency modulation), primary frequency modulation and secondary frequency modulation, wherein the action time of the primary frequency modulation is within 20-60 s. In practice, the frequency floor is usually reached within 10s when the grid frequency is disturbed. The wind power plant starts responding to power support after the power grid frequency is reduced for about 15s, and the time for reaching the power support target value is about 20 s.
Patent publication No. CN204243768U discloses an automatic reactive power balance compensation device, including a power factor control device and a reactive power compensation capacitor bank; the power factor control device is arranged on the high-voltage 10kV side, and the reactive compensation capacitor bank is arranged on the low-voltage 0.4kV side. The power factor control device comprises a data acquisition and analysis system and a control system; the data acquisition and analysis system comprises a data acquisition device and a computing system. The automatic reactive power balance compensation device is analyzed by collecting data by a data collecting and analyzing system, and a control system in the power factor control device controls switching of the reactive power compensation capacitor bank according to an analysis result.
Although reactive compensation is carried out on the electricity in situ in the transmission process, the reactive compensation method is difficult to be applied to a wind power grid, and meanwhile, a quick and accurate compensation and adjustment function is lacked.
Disclosure of Invention
The invention mainly aims to provide a power grid primary frequency modulation system with reactive power balance and compensation adjustment functions, the compensation balance is realized by setting a power control system with mutual coupling of gain and subtraction so as to avoid the situation of overcompensation or insufficient compensation, and meanwhile, when primary frequency modulation is performed, a new algorithm is used for completing the primary frequency modulation under the condition of less acquisition parameters, and meanwhile, the energy storage of a wind power network is optimized and automatically controlled, so that the power grid primary frequency modulation system has the advantage of high intelligent degree.
In order to solve the technical problems, the invention provides a three-dimensional matching method based on mixed tree filtering, which comprises the following steps:
the power grid primary frequency modulation system with reactive power balance and compensation regulation functions comprises a power grid and a total control system; the overall control system includes: the system comprises a frequency modulation control system, an energy storage array management unit, a compensation control system, a gain power control system and a gain power reduction control system; the power grid is a wind power grid, comprising: the system comprises a wind turbine generator, an energy storage array and a bus, wherein the wind turbine generator and the energy storage array are connected with the bus; the energy storage array management unit is configured to respond to a first control instruction of the frequency modulation control system and manage the energy storage array; the compensation control system is configured to acquire a second control instruction of the frequency modulation control system unit, calculate a binary compensation control instruction according to the second control instruction, and send the binary compensation control instruction to the gain power control system and the gain power control system respectively; the power-reducing power control system and the gain power control system respectively carry out power grid compensation adjustment according to the binary control instruction; the bipartite control instruction is formed by associating two mutually coupled instructions through a bipartite function, and comprises the following components: a first divide-by-two instruction, a second divide-by-two instruction, and a divide-by-two function; the gain power control system and the gain power reduction control system respectively acquire one of a first divide-by-two instruction or a second divide-by-two instruction, and the first divide-by-two instruction and the second divide-by-two instruction are simultaneously changed according to a divide-by-two function in real time in the running process; the frequency modulation control system is configured to acquire operation parameters of a power grid in real time, generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameters, generate a second control instruction by using a compensation parameter generation algorithm, generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, finish primary frequency modulation of the power grid by the primary frequency modulation control instruction, and respectively control the energy storage array management unit board and the compensation control system by using the first control instruction and the second control instruction to finish reactive balance and compensation adjustment of the power grid.
Further, the frequency modulation control system includes: the system comprises a data acquisition unit, an energy storage model unit, a compensation model unit and a primary frequency modulation unit; the signal acquisition unit acquires the operation parameters of the power grid in real time; the operating parameters include: bus power, bus frequency, wind turbine power, wind turbine frequency, bus voltage and bus current; the energy storage model unit is configured to generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameter; the compensation model unit is configured to generate a second control instruction by using a compensation parameter generation algorithm based on the operation parameter; and the primary frequency modulation unit is configured to generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, and complete primary frequency modulation of the power grid through the primary frequency modulation control instruction.
Further, the method for generating the first control instruction by using the energy storage parameter generation algorithm based on the operation parameter by the energy storage model unit comprises the following steps: substituting the operation parameters into an energy storage parameter generation algorithm to generate a group of energy storage control parameters; the energy storage control parameters include: energy storage time, an upper energy storage limit and a lower energy storage limit; the energy storage control parameter constitutes a first control command.
Further, the energy storage parameter generation algorithm is expressed by using the following formula:
wherein P is 1 Is the power of bus, F 1 Is the bus frequency, P 2 For the power of wind turbine generator system, F 2 For the frequency, V of the wind turbine 1 Is the bus voltage, I 1 Is bus current; EMAX is the upper energy storage limit, ET is the energy storage time, and EMIN is the lower energy storage limit; c is an adjustment coefficient, and the value range is 3-5; θ is the phase of the bus; and ENE is an energy storage parameter.
Further, the compensation model unit generates the second control instruction using a compensation parameter generation algorithm based on the operation parameter: substituting the operation parameters into a compensation parameter generation algorithm to generate a group of compensation control parameters; the compensation control parameters at least comprise: a compensation power value, a compensation voltage value, a compensation current value and a compensation time; the compensation control parameter constitutes a second control command.
Further, the operation process of the compensation parameter generation algorithm includes: calculating the difference between the running parameter and the standard parameter, multiplying each difference by a preset weight coefficient corresponding to the difference, taking an average value to obtain an average difference, carrying the average difference into a compensation parameter compensation rate algorithm to calculate to obtain a compensation rate, and multiplying the compensation rate by a standard value to obtain a compensation value; the standard values include standard power, standard voltage, standard current, and standard time.
Further, the method for generating the primary frequency modulation control instruction by the primary frequency modulation unit based on the operation parameter and using a primary frequency modulation parameter generation algorithm comprises the following steps: the operation parameters are carried into a frequency modulation parameter generation algorithm to generate a group of frequency modulation control parameters; the frequency modulation control parameters include: frequency modulation frequency and duration of frequency modulation; the frequency modulation control parameters constitute a frequency modulation control instruction.
Further, the primary frequency modulation parameter generation algorithm is expressed by using the following formula:
wherein F is 1n The bus frequency sequence is a bus frequency value in a set time; f is the frequency modulation frequency; the frequency modulation duration is equal to the set time.
Further, the binary function is a mapping relation function, is a monotonically increasing function, and includes: a quadratic function, an exponential function, or a power function.
Further, the parameters contained in the second divide-by-two instruction are in one-to-one correspondence with the parameters contained in the first divide-by-two instruction, and each corresponding parameter is associated through the coupling of the divide-by-two function.
The power grid primary frequency modulation system with reactive power balance and compensation regulation functions has the following beneficial effects: when the compensation adjustment is performed, the compensation is performed by constructing two associated bipartite instructions, so that the occurrence of the conditions of overcompensation and undercompensation is avoided. Meanwhile, when reactive power balance is carried out, the invention is realized aiming at a special energy storage array in a wind power generation network without using the traditional technology, and the reactive power balance is realized by adjusting the time and the upper and lower limits of energy storage in the energy storage array, so that the occupancy rate of system resources is reduced, and the invention is more suitable for the wind power generation network; on the other hand, in the process of primary frequency modulation, compensation adjustment and energy storage control, parameters are generated through an innovative algorithm, and the obtained result is more accurate and the efficiency is higher.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic system structure diagram of a primary frequency modulation system with reactive power balance and compensation adjustment functions for a power grid according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a frequency modulation control system of a primary frequency modulation system of a power grid with reactive power balance and compensation adjustment functions according to an embodiment of the present invention.
Detailed Description
The method of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1 and 2, a primary frequency modulation system of a power grid with reactive power balance and compensation regulation functions comprises a power grid and a total control system; the overall control system includes: the system comprises a frequency modulation control system, an energy storage array management unit, a compensation control system, a gain power control system and a gain power reduction control system; the power grid is a wind power grid, comprising: the system comprises a wind turbine generator, an energy storage array and a bus, wherein the wind turbine generator and the energy storage array are connected with the bus; the energy storage array management unit is configured to respond to a first control instruction of the frequency modulation control system and manage the energy storage array; the compensation control system is configured to acquire a second control instruction of the frequency modulation control system unit, calculate a binary compensation control instruction according to the second control instruction, and send the binary compensation control instruction to the gain power control system and the gain power control system respectively; the power-reducing power control system and the gain power control system respectively carry out power grid compensation adjustment according to the binary control instruction; the bipartite control instruction is formed by associating two mutually coupled instructions through a bipartite function, and comprises the following components: a first divide-by-two instruction, a second divide-by-two instruction, and a divide-by-two function; the gain power control system and the gain power reduction control system respectively acquire one of a first divide-by-two instruction or a second divide-by-two instruction, and the first divide-by-two instruction and the second divide-by-two instruction are simultaneously changed according to a divide-by-two function in real time in the running process; the frequency modulation control system is configured to acquire operation parameters of a power grid in real time, generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameters, generate a second control instruction by using a compensation parameter generation algorithm, generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, finish primary frequency modulation of the power grid by the primary frequency modulation control instruction, and respectively control the energy storage array management unit board and the compensation control system by using the first control instruction and the second control instruction to finish reactive balance and compensation adjustment of the power grid.
Specifically, a set of independently controlled primary frequency modulation system devices is researched, and control functions such as station-level inertia response, primary frequency modulation and automatic voltage regulation are realized; the system comprises a frequency measuring device, a network communication device, an intelligent control terminal and a man-machine interaction system. The primary frequency modulation system device can set primary frequency modulation parameters according to the on-site working conditions, can rapidly adjust active power output according to the frequency change of the grid connection point, and achieves rapid response of the frequency change of the power grid. The system frequency measurement method has the advantages that the system frequency measurement method is used for measuring the system frequency of the plant station and communicating with other interface systems, the active-frequency sagging characteristic control is completed, the system frequency measurement method is used for enabling the system frequency measurement method to participate in the rapid adjustment capability of the frequency of the power grid at the grid-connected point, and the new requirements of the power grid on reactive balance and compensation adjustment capability, the network source coordination capability (primary frequency modulation, rapid voltage regulation, inertia response and the like) of the new energy field station are met.
The primary frequency modulation system device adopts a Linux safe operation system, the communication interface meets the communication protocol requirements of common industrial protocols (ModBus 485, IEC101, IEC102, IEC103, IEC104, OPC, BACnet, FTP, DNP3.0, TUV-61850, FCC and the like), and meanwhile, the primary frequency modulation system device can support analysis of power protocols and meets the communication with a station scheduling AGC system and an inverter; the accuracy of the frequency measurement of the station system can reach 0.001Hz, and the control period is 20ms.
Example 2
On the basis of the above embodiment, the frequency modulation control system includes: the system comprises a data acquisition unit, an energy storage model unit, a compensation model unit and a primary frequency modulation unit; the signal acquisition unit acquires the operation parameters of the power grid in real time; the operating parameters include: bus power, bus frequency, wind turbine power, wind turbine frequency, bus voltage and bus current; the energy storage model unit is configured to generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameter; the compensation model unit is configured to generate a second control instruction by using a compensation parameter generation algorithm based on the operation parameter; and the primary frequency modulation unit is configured to generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, and complete primary frequency modulation of the power grid through the primary frequency modulation control instruction.
Specifically, a wind turbine generator system is a system that converts kinetic energy of wind into electrical energy.
The wind generating set comprises a wind wheel and a generator; the wind wheel comprises blades, a hub, reinforcing members and the like; it has the functions of wind power rotation to generate power, rotation of generator head, etc. The wind power generation power supply consists of a wind power generator set, a tower for supporting the wind power generator set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like.
When the wind generating set generates electricity, the output electricity frequency is ensured to be constant. This is necessary for both fan-grid power generation and wind-solar hybrid power generation. The constant frequency of wind power is ensured, one way is to ensure the constant rotation speed of the generator, namely the constant-speed and constant-frequency operation way, and the rotation speed of the wind turbine is definitely constant because the generator is driven by the wind turbine through a transmission device, so that the conversion efficiency of wind energy can be influenced; the other mode is that the rotation speed of the generator changes along with the wind speed, and the frequency of the output electric energy is ensured to be constant by other means, namely variable speed constant frequency operation.
Example 3
On the basis of the above embodiment, the method for generating the first control instruction by using the energy storage parameter generation algorithm based on the operation parameter by the energy storage model unit includes: substituting the operation parameters into an energy storage parameter generation algorithm to generate a group of energy storage control parameters; the energy storage control parameters include: energy storage time, an upper energy storage limit and a lower energy storage limit; the energy storage control parameter constitutes a first control command.
Example 4
In the above embodimentOn the basis, the energy storage parameter generation algorithm is expressed by using the following formula:
wherein P is 1 Is the power of bus, F 1 Is the bus frequency, P 2 For the power of wind turbine generator system, F 2 For the frequency, V of the wind turbine 1 Is the bus voltage, I 1 Is bus current; EMAX is the upper energy storage limit, ET is the energy storage time, and EMIN is the lower energy storage limit; c is an adjustment coefficient, and the value range is 3-5; θ is the phase of the bus; and ENE is an energy storage parameter.
Example 5
On the basis of the above embodiment, the compensation model unit generates the second control instruction using a compensation parameter generation algorithm based on the operation parameter: substituting the operation parameters into a compensation parameter generation algorithm to generate a group of compensation control parameters; the compensation control parameters at least comprise: a compensation power value, a compensation voltage value, a compensation current value and a compensation time; the compensation control parameter constitutes a second control command.
Example 6
On the basis of the above embodiment, the operation process of the compensation parameter generation algorithm includes: calculating the difference between the running parameter and the standard parameter, multiplying each difference by a preset weight coefficient corresponding to the difference, taking an average value to obtain an average difference, carrying the average difference into a compensation parameter compensation rate algorithm to calculate to obtain a compensation rate, and multiplying the compensation rate by a standard value to obtain a compensation value; the standard values include standard power, standard voltage, standard current, and standard time.
Specifically, the formula of the compensation parameter compensation rate algorithm is as follows:
gamma is equal to 0.577216; wherein Γ is the compensation rate, and L is the average difference.
Example 7
On the basis of the above embodiment, the method for generating a primary frequency modulation control instruction by the primary frequency modulation unit using a primary frequency modulation parameter generation algorithm based on an operation parameter includes: the operation parameters are carried into a frequency modulation parameter generation algorithm to generate a group of frequency modulation control parameters; the frequency modulation control parameters include: frequency modulation frequency and duration of frequency modulation; the frequency modulation control parameters constitute a frequency modulation control instruction.
Example 8
On the basis of the above embodiment, the primary frequency modulation parameter generation algorithm is expressed by using the following formula:
wherein F is 1n The bus frequency sequence is a bus frequency value in a set time; f is the frequency modulation frequency; the frequency modulation duration is equal to the set time.
Example 9
On the basis of the above embodiment, the binary function is a mapping relation function, is a monotonically increasing function, and includes: a quadratic function, an exponential function, or a power function.
Example 10
On the basis of the above embodiment, the parameters included in the second divide-by-two instruction are in one-to-one correspondence with the parameters included in the first divide-by-two instruction, and each corresponding parameter is associated by a divide-by-two function coupling.
The reactive power balance conditions of the power system are as follows: the reactive power that a reactive power source in a power system may deliver should be greater than or at least equal to the sum of the reactive power required by the load and the reactive power loss in the network, while the system must be configured with a certain reactive reserve capacity in order to guarantee operational reliability and to accommodate the increase of reactive loads. The balance relation of the reactive power of the system is as follows: q (Q) GC -Q LD -Q L ＝Q RES Wherein Q is GC Is a reactive power supply, Q LD For reactive load, Q L For reactive power loss of power network, Q RES For reactive power reserve. When Q is RES >At 0, it means that reactive power in the system can be balanced and there isA proper amount of the liquid crystal display is reserved for standby; when Q is RES When=0, it means that the reactive power in the system is just balanced; when Q is RES <At 0, the reactive power in the system is insufficient, and a reactive compensation device is considered. The reactive power compensation device comprises a static reactive power compensation device and a dynamic reactive power compensation device, wherein the static reactive power compensation device comprises a low-voltage shunt capacitor, a low-voltage shunt reactor and a high-voltage shunt reactor, and the dynamic reactive power compensation device comprises a synchronous compensator (camera), a static reactive power dynamic compensation device (SVS), a controllable high reactance and the like. Wherein the controllable high reactance can be used for solving the contradiction between limiting overvoltage and reactive phase modulation voltage regulation.
While specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that these specific embodiments are by way of example only, and that various omissions, substitutions, and changes in the form and details of the methods and systems described above may be made by those skilled in the art without departing from the spirit and scope of the invention. For example, it is within the scope of the present invention to combine the above-described method steps to perform substantially the same function in substantially the same way to achieve substantially the same result. Accordingly, the scope of the invention is limited only by the following claims.
Claims (10)
1. The power grid primary frequency modulation system with reactive power balance and compensation regulation functions comprises a power grid and a total control system; characterized in that the overall control system comprises: the system comprises a frequency modulation control system, an energy storage array management unit, a compensation control system, a gain power control system and a gain power reduction control system; the power grid is a wind power grid, comprising: the system comprises a wind turbine generator, an energy storage array and a bus, wherein the wind turbine generator and the energy storage array are connected with the bus; the energy storage array management unit is configured to respond to a first control instruction of the frequency modulation control system and manage the energy storage array; the compensation control system is configured to acquire a second control instruction of the frequency modulation control system unit, calculate a binary compensation control instruction according to the second control instruction, and send the binary compensation control instruction to the gain power control system and the gain power control system respectively; the power-reducing power control system and the gain power control system respectively carry out power grid compensation adjustment according to the binary control instruction; the bipartite control instruction is formed by associating two mutually coupled instructions through a bipartite function, and comprises the following components: a first divide-by-two instruction, a second divide-by-two instruction, and a divide-by-two function; the gain power control system and the gain power reduction control system respectively acquire one of a first divide-by-two instruction or a second divide-by-two instruction, and the first divide-by-two instruction and the second divide-by-two instruction are simultaneously changed according to a divide-by-two function in real time in the running process; the frequency modulation control system is configured to acquire operation parameters of a power grid in real time, generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameters, generate a second control instruction by using a compensation parameter generation algorithm, generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, finish primary frequency modulation of the power grid by the primary frequency modulation control instruction, and respectively control the energy storage array management unit board and the compensation control system by using the first control instruction and the second control instruction to finish reactive balance and compensation adjustment of the power grid.
2. The system of claim 1, wherein the frequency modulation control system comprises: the system comprises a data acquisition unit, an energy storage model unit, a compensation model unit and a primary frequency modulation unit; the signal acquisition unit acquires the operation parameters of the power grid in real time; the operating parameters include: bus power, bus frequency, wind turbine power, wind turbine frequency, bus voltage and bus current; the energy storage model unit is configured to generate a first control instruction by using an energy storage parameter generation algorithm based on the operation parameter; the compensation model unit is configured to generate a second control instruction by using a compensation parameter generation algorithm based on the operation parameter; and the primary frequency modulation unit is configured to generate a primary frequency modulation control instruction by using a primary frequency modulation parameter generation algorithm, and complete primary frequency modulation of the power grid through the primary frequency modulation control instruction.
3. The system of claim 2, wherein the energy storage model unit generates the first control command using an energy storage parameter generation algorithm based on the operating parameter, the method comprising: substituting the operation parameters into an energy storage parameter generation algorithm to generate a group of energy storage control parameters; the energy storage control parameters include: energy storage time, an upper energy storage limit and a lower energy storage limit; the energy storage control parameter constitutes a first control command.
4. The system of claim 3, wherein the stored energy parameter generation algorithm is expressed using the following formula:
wherein P is 1 Is the power of bus, F 1 Is the bus frequency, P 2 For the power of wind turbine generator system, F 2 For the frequency, V of the wind turbine 1 Is the bus voltage, I 1 Is bus current; EMAX is the upper energy storage limit, ET is the energy storage time, and EMIN is the lower energy storage limit; c is an adjustment coefficient, and the value range is 3-5; θ is the phase of the bus; and ENE is an energy storage parameter.
5. The system of claim 4, wherein the compensation model unit generates the second control instruction based on the operating parameter using a compensation parameter generation algorithm: substituting the operation parameters into a compensation parameter generation algorithm to generate a group of compensation control parameters; the compensation control parameters at least comprise: a compensation power value, a compensation voltage value, a compensation current value and a compensation time; the compensation control parameter constitutes a second control command.
6. The system of claim 5, wherein the compensation parameter generation algorithm operates by: calculating the difference between the running parameter and the standard parameter, multiplying each difference by a preset weight coefficient corresponding to the difference, taking an average value to obtain an average difference, carrying the average difference into a compensation parameter compensation rate algorithm to calculate to obtain a compensation rate, and multiplying the compensation rate by a standard value to obtain a compensation value; the standard values include standard power, standard voltage, standard current, and standard time.
7. The system of claim 6, wherein the method for generating a chirp control command based on an operating parameter using a chirp parameter generation algorithm comprises: the operation parameters are carried into a frequency modulation parameter generation algorithm to generate a group of frequency modulation control parameters; the frequency modulation control parameters include: frequency modulation frequency and duration of frequency modulation; the frequency modulation control parameters constitute a frequency modulation control instruction.
8. The system of claim 7, wherein the chirp parameter generation algorithm is expressed using the following formula:
wherein F is 1n The bus frequency sequence is a bus frequency value in a set time; f is the frequency modulation frequency; the frequency modulation duration is equal to the set time.
9. The system of claim 8, wherein the bisection function is a mapping function, is a monotonically increasing function, and comprises: a quadratic function, an exponential function, or a power function.
10. The system of claim 9, wherein the parameters included in the second divide-by-two instruction are in one-to-one correspondence with the parameters included in the first divide-by-two instruction, each corresponding parameter being associated by a divide-by-two function coupling.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204243768U (en) * | 2014-08-11 | 2015-04-01 | 杭州华春科技有限公司 | A kind of reactive balance compensation arrangement automatically |
| CN111525616A (en) * | 2020-05-06 | 2020-08-11 | 三一重能有限公司 | Control system and method for wind power plant |
-
2023
- 2023-03-06 CN CN202310230501.8A patent/CN116207753A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204243768U (en) * | 2014-08-11 | 2015-04-01 | 杭州华春科技有限公司 | A kind of reactive balance compensation arrangement automatically |
| CN111525616A (en) * | 2020-05-06 | 2020-08-11 | 三一重能有限公司 | Control system and method for wind power plant |
Non-Patent Citations (4)
| Title |
|---|
| 刘增玉 等: "《高等数学》", 30 June 2009, 天津科学技术出版社 * |
| 李海涛 等: "《MATLAB 6.1基础及应用技巧》", 31 March 2002, 国防工业出版社 * |
| 钱国华 等: "《线性代数》", 30 June 2022, 上海交通大学出版社 * |
| 高飞 等 译: "《线性系统理论与设计（第4版）》", 31 May 2019, 北京航空航天大学出版社 * |
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