CN113394795A - Online active evaluation method, system and medium for wind power primary frequency modulation capability of inland mountainous region - Google Patents
Online active evaluation method, system and medium for wind power primary frequency modulation capability of inland mountainous region Download PDFInfo
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- H—ELECTRICITY
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- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
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Abstract
The invention discloses an online active evaluation method, system and medium for wind power primary frequency modulation capability of inland mountains, wherein the system comprises a scheduling end primary frequency modulation evaluation master station, a wind power field end primary frequency modulation response substation, a wind power field EMS system, a wind power field AGC system, a data communication network shutdown machine and a wind power field synchronization vector measuring device; the scheduling end primary frequency modulation evaluation master station finishes online test items in a primary frequency modulation active test operation task set one by one on the basis of wind power plant operation conditions and wind power ultra-short term prediction data, and simultaneously finishes primary frequency modulation capability evaluation and visual display of the wind power plant on line in real time; the wind power plant end primary frequency modulation response sub-station automatically generates a primary frequency modulation active test task set, and real-time online calculates the output active power adjustment quantity of the wind power plant in the test process, so that the wind power plant participates in primary frequency modulation of the power grid. The invention can automatically complete all test items in the wind power plant primary frequency modulation capability test task set on line.
Description
Technical Field
The invention belongs to the field of power supply or power distribution systems, and particularly relates to an online active evaluation method, system and medium for wind power primary frequency modulation capability in inland mountainous regions.
Background
In recent years, wind power in our province is rapidly developed, wind power grid-connected scale is continuously promoted to occupy space of conventional hydroelectric and thermal power generating units with rotational inertia, and wind power plants do not have primary frequency modulation capability, so that available rapid frequency response resources of a power grid are gradually reduced, and frequency modulation pressure and safe operation risk of the power grid are increased day by day. In order to maintain the stable frequency of the power grid, national standards such as power system grid source coordination technical specification, power system safety and stability guide rule and the like clearly require that the wind power plant has a primary frequency modulation response function, can participate in the frequency adjustment of the power grid, and clearly provide technical requirements and technical indexes for participating in the primary frequency modulation of the power grid.
Currently, the main way to master the primary frequency modulation capability of a wind power plant is to develop a field primary frequency modulation test. In a field test, a typical test scene (specific operating condition and specific power grid simulation frequency data) of the wind power plant is generally selected, and primary frequency modulation performance evaluation of the wind power plant is carried out according to the field test data. However, due to the randomness of wind power output, the diversity of the actual frequency response waveform of the power grid and the large dynamic difference of the primary frequency modulation response performance of the wind power plant under different operating conditions, the primary frequency modulation dynamic performance of the wind power plant cannot be evaluated in an all-around and accurate real-time manner only by means of field tests, and the online active test of the primary frequency modulation capability of the wind power plant is urgently needed.
At present, scholars propose a primary frequency modulation capability online test system and a test method for a wind power plant, but the invention mainly aims at a primary frequency modulation test master station of a dispatching end and the test method thereof. However, the implementation of the online test of the primary frequency modulation capability of the wind power plant is a system engineering, besides the primary frequency modulation master station at the scheduling end, all methods of wind power plant secondary systems such as wind power plant primary frequency modulation substations, a wind power plant EMS system, a wind power plant AGC system and the like are required to participate, and how to coordinate and cooperate the devices, coordinate the test flow and design the system communication mode is not involved.
Disclosure of Invention
The invention provides an online active evaluation method, system and medium for primary frequency modulation capability of wind power in inland mountainous regions, which can realize online active test, aiming at the problem that the primary frequency modulation dynamic performance of a wind power station cannot be evaluated in an all-round and accurate real-time manner in a field test.
The technical scheme of the invention is as follows:
on the one hand, an online active evaluation system for primary wind power frequency modulation capability in inland mountainous regions comprises:
wind-powered electricity generation field synchronous vector measuring device: the wind power plant booster transformer is arranged on the high-voltage side of the wind power plant booster transformer and used for collecting three-phase fundamental wave voltage, three-phase fundamental wave current and wind power plant active power of a wind power plant grid-connected point in real time and transmitting the three-phase fundamental wave voltage, the three-phase fundamental wave current and the wind power plant active power to a wind power plant end primary frequency modulation substation and a scheduling end primary frequency modulation master station in real time;
data communication gateway machine: the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station are used for transmitting and receiving real-time data information and control instructions of the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station and the wind power plant AGC system in real time;
wind farm EMS System: the system comprises a frequency modulation module, a power control module and a power control module, wherein the frequency modulation module is used for calculating a real-time output active power instruction of a wind power plant after frequency modulation, and distributing the real-time output active power instruction of the wind power plant to each wind power generation set according to the maximum available power of each wind power generation set at present;
wind power plant AGC system: the system is used for controlling the wind power plant to output active power and sending the active power output by the wind power plant to the EMS system;
the primary frequency modulation evaluation master station of the dispatching end: the wind power ultra-short-term prediction data is used for executing an active test program of the primary frequency modulation capability of the wind power plant; the method comprises the steps that on-line evaluation of the primary frequency modulation capability of the wind power plant is carried out by obtaining an electric field output power response curve of a synchronous vector measurement unit;
wind power plant end primary frequency modulation response substation: the wind power plant primary frequency modulation active test task set is generated by power grid analog frequency data received from the scheduling end primary frequency modulation evaluation master station through the data communication network shutdown, and active power required to be adjusted by the wind power plant is calculated.
To implement active online automatic testing, different test job information is generated in the substation, rather than automatically in the master station. The advantage is that the substation does not need to analyze the test operation information file of the main station in each test process, and the response rate of the whole evaluation flow is improved.
And judging whether to execute the test operation or not by utilizing wind power ultra-short-term prediction data provided by a wind power prediction system of the wind power plant. The time of each test task is 60s, the operating condition (output power) of the wind power plant in 60s needs to meet the requirement of the test task on the operating condition of the wind power plant, the output power of the wind power plant changes constantly, the requirement of the test operating condition can be met in the first 30s, and the requirement of the test operating condition is not met in the last 30s, so that the test operation fails, which is a process which is neglected in the current stage. After the wind power ultra-short term prediction data is introduced, the test operation task is executed when the operation condition of the wind power plant in the future 90s (the margin of 30s is reserved) meets the test requirement. Otherwise, not executing and continuously waiting;
the system realizes the staged transmission of control instruction data and real-time running data (PMU), reduces the bandwidth of a communication channel and improves the rapidity of the whole system; the existing equipment and functions of the wind power plant are fully utilized, and the investment of the system is reduced. The execution task content of each system module is clear, and the alternation and the overlapping of the functions among the system modules are avoided.
Further, the data communication gateway device comprises three channels:
PMU data channel: the IEC103 protocol is adopted to realize real-time data transmission between the data communication gateway machine and the primary frequency modulation master station of the scheduling end, and the data precision is 10-100 ms;
telemechanical data channel: a 102 protocol is adopted to realize data communication between the primary frequency modulation master station at the scheduling end and the primary frequency modulation response substation and the AGC system of the wind power plant at the same wind power plant end;
lan network interface hard wired channel: and an IEC104 protocol is adopted to realize data communication between the wind power plant EMS system and the primary frequency modulation response substation and the wind power plant AGC system at the wind power plant end, and the synchronous vector measurement unit is in data communication with the primary frequency modulation response substation at the wind power plant end.
Further, a visualization unit is arranged on the scheduling end primary frequency modulation evaluation master station.
On the other hand, the online active evaluation method for the primary wind power frequency modulation capability of the inland mountains comprises the following steps:
step 1: sending a substation test condition preparation state query instruction to the wind power plant end primary frequency modulation response substation;
step 2: the wind power plant end primary frequency modulation response substation carries out self-checking, judges whether a substation test condition is met or not according to a self-checking result and the current running state of the wind power plant, and sends a substation test preparation state to the scheduling end primary frequency modulation evaluation main station;
and step 3: if the dispatching end primary frequency modulation evaluation master station receives that the substation test is ready, sending a power grid simulation test frequency message to the wind farm end primary frequency modulation response substation, otherwise, terminating the test;
and 4, step 4: after receiving the power grid simulation test frequency message, the wind power plant end primary frequency modulation response substation analyzes the power grid simulation test frequency message, automatically generates a wind power plant primary frequency modulation active test operation task set T in combination with the wind power plant output power condition required by the test, and sends the wind power plant test operation task preparation state, the test project names of all test operation tasks in the active test operation task set T and the wind power plant output power required by the test to a scheduling end primary frequency modulation evaluation master station;
each test operation task in the task set comprises a test project Name (Name), a power grid analog frequency time sequence (fTi), a time sequence (Ti), a wind power plant output power value (Pi) required by the test, an AGC instruction and a logic (SPi) of a substation primary frequency modulation adjustment quantity;
and 5: the dispatching end primary frequency modulation evaluation master station receives that the test job task is not ready, and then the step 13 is carried out; if the dispatching end primary frequency modulation evaluation master station checks that the test tasks in the test job task set T are all completed, turning to step 13; if not, the scheduling end primary frequency modulation evaluation master station judges whether the test condition of the residual test operation tasks in the operation task set T is matched with the current operation condition of the wind power plant or not based on the current operation condition of the wind power plant and the ultra-short-term wind power prediction result;
step 6: if not, after waiting for 60s, returning to the step 5; if the test operation task Ti meets the condition, the test operation task Ti sends the required initial operation power of the wind power plant to the wind power plant AGC systemP AGC0；
And 7: the AGC system of the wind power plant receives the initial operating power of the wind power plantP AGC0Adjusting the output power of the wind farm toP AGC0Then sending the initial operation condition preparation state of the wind power plant to a primary frequency modulation evaluation master station of a scheduling end;
and 8: the scheduling end primary frequency modulation evaluation master station receives that the setting of the initial operation condition of the wind power plant is not ready, and then the step 13 is carried out;
after the primary frequency modulation evaluation master station of the scheduling end is ready according to the received initial operation condition of the setting station, sending a Ti test execution starting signal to the primary frequency modulation response substation of the wind farm end;
and step 9: after the primary frequency modulation response substation at the wind power plant end receives the Ti test starting signal, calculating a wind power plant output power adjustment quantity instruction delta P according to the power grid analog frequency valuerefAnd sends the data to the wind power plant EMS system; simultaneously recording the current time and moment and sending the current time and moment to a primary frequency modulation evaluation master station of a degree end for calculating primary frequency modulation indexes;
step 10: wind power generationField EMS System based on Δ PrefAGC command of wind power plant at current momentP t AGCAnd the previous control periodP t-1 AGCThe value of (a), calculating the wind power plant output active power instruction at the current momentP wind,refThen, calculating the active power instruction of each in-operation wind turbine generator in the wind power plant according to a preset ruleP i g,ref I =1,2, ∙ ∙ ∙, n, i is the wind turbine generator number; n is the number of the wind generation sets in operation of the current wind power plant and is issued to each wind generation set control system;
step 11: after the primary frequency modulation online active test is executed for 60s, waiting for 10s, and sending Ti test ending information to the host by the primary frequency modulation response substation at the wind power plant end;
step 12: after the scheduling end primary frequency modulation evaluation master station receives a Ti test ending signal, acquiring real-time information of the synchronous vector measuring device, and starting a Ti test result evaluation program; meanwhile, returning to the step 6, and continuing to complete other online active test operation tasks;
step 13: the test is terminated.
Further, calculating a wind power plant output power adjustment quantity instruction delta P according to the power grid analog frequency valuerefCalculated according to the following formula:
in the formula:frepresenting the power grid simulation frequency value with the unit of Hz;fdrepresenting a primary frequency modulation dead zone with the unit of Hz;f N represents the rated frequency of the system, and has the unit of Hz;Pethe rated capacity of a primary frequency modulation control object is expressed, and the unit is MW; the value range of the new energy primary frequency modulation difference adjustment coefficient is 2-5;fL=50—fd，fH=50+fd。
further, the wind power plant outputs an active power instruction at the current momentP wind,refCalculated according to the following formula:
in the formula:frepresenting the power grid simulation frequency value with the unit of Hz;fdrepresenting a primary frequency modulation dead zone with the unit of Hz;f N represents the rated frequency of the system, and has the unit of Hz;Pethe rated capacity of a primary frequency modulation control object is expressed, and the unit is MW; the value range of the new energy primary frequency modulation difference adjustment coefficient is 2-5;fL=50—fd，fH=50+fd。
further, according to the maximum available power of each current wind turbine generator, distributing an active power instruction output by the wind power plant in real time to each wind turbine generator according to the maximum available power of each current wind turbine generator;
wherein the content of the first and second substances,P i gmaxrepresenting the maximum available power of the ith wind turbine generator set,P i g,ref and representing the real-time active power of the ith wind generating set.
Furthermore, a PMU data channel is adopted between the wind power plant synchronous vector measuring device and the scheduling end primary frequency modulation master station, real-time data are transmitted by adopting an IEC103 protocol, and the data precision is 10-100 ms;
a telecontrol data channel is adopted between the primary frequency modulation master station at the dispatching end and the primary frequency modulation response substation at the same wind power plant end as well as the AGC system of the wind power plant, and data communication is carried out based on a 102 protocol;
the wind power plant EMS system and the wind power plant end primary frequency modulation response substation and the wind power plant AGC system are in data communication, the synchronous vector measurement unit and the wind power plant end primary frequency modulation response substation are in data communication through a local area network interface hard wiring, and the data communication is carried out based on an IEC104 protocol.
Further, the fact that the test condition of the test operation task is matched with the current wind power plant operation condition means that the wind power plant ultra-short term wind power predicted value within 90s meets the wind power plant operation condition requirement required by the test condition.
In yet another aspect, a readable storage medium includes computer program instructions, and the computer program instructions, when executed by a processing terminal, cause the processing terminal to execute the online active evaluation method for wind power primary frequency modulation capability in inland mountainous regions.
Advantageous effects
The technical scheme of the invention provides an online active evaluation method, a system and a medium for the primary frequency modulation capability of wind power in inland mountainous regions, wherein the system comprises a scheduling end primary frequency modulation evaluation master station, a wind power field end primary frequency modulation response substation, a wind power field EMS system, a wind power field AGC system, a data communication network shutdown machine and a wind power field synchronization vector measuring device; the scheduling end primary frequency modulation evaluation master station finishes online test items in a primary frequency modulation active test operation task set one by one on the basis of wind power plant operation conditions and wind power ultra-short term prediction data, and simultaneously finishes primary frequency modulation capability evaluation and visual display of the wind power plant on line in real time; the wind power plant end primary frequency modulation response sub-station automatically generates a primary frequency modulation active test task set, and real-time online calculates the output active power adjustment quantity of the wind power plant in the test process, so that the wind power plant participates in primary frequency modulation of the power grid. The invention designs a system communication method and an online active evaluation method flow, can automatically complete all test items in a wind power plant primary frequency modulation capability test task set on line, and automatically quantizes and evaluates test operation results, and has important significance for accurately mastering the primary frequency modulation capability of the wind power plant and ensuring the stability and safety of the power grid frequency.
The online active evaluation method provided by the invention has the following advantages:
(1) in the active evaluation process, functions of all system modules are clearly divided, and all instruction calculation, execution logic and remote control and remote measurement data information transmission in the wind power plant EMS are avoided, so that the system architecture design and the active test flow are simplified;
(2) the method has the advantages that the test job task set and the test information thereof are automatically generated at the wind power plant end primary frequency modulation response substation, the data analysis and preprocessing time after the test information data is transmitted to the wind power plant substation by the scheduling end master station is saved, and the time and the efficiency required by the online active test of the wind power primary frequency modulation capability are reduced.
(3) In order to meet the requirements of rapidity and reliability, data information required by active evaluation is subjected to staged miss processing. The control information such as remote control and remote measurement in the active test process is transmitted in real time, and the synchronous vector measurement data required by the active evaluation of the primary frequency modulation performance is acquired through a calling mode after the test is finished.
The system provided by the invention realizes the staged transmission of control instruction data and real-time running data (PMU), reduces the bandwidth of a communication channel and improves the rapidity of the whole system; the existing equipment and functions of the wind power plant are fully utilized, and the investment of the system is reduced. The execution task content of each system module is clear, and the alternation and the overlapping of the functions among the system modules are avoided.
Drawings
Fig. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, an online active evaluation system for primary wind power frequency modulation capability in inland mountains includes:
wind-powered electricity generation field synchronous vector measuring device: the wind power plant booster transformer is arranged on the high-voltage side of the wind power plant booster transformer and used for collecting three-phase fundamental wave voltage, three-phase fundamental wave current and wind power plant active power of a wind power plant grid-connected point in real time and transmitting the three-phase fundamental wave voltage, the three-phase fundamental wave current and the wind power plant active power to a wind power plant end primary frequency modulation substation and a scheduling end primary frequency modulation master station in real time;
data communication gateway machine: the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station are used for transmitting and receiving real-time data information and control instructions of the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station and the wind power plant AGC system in real time;
wind farm EMS System: the system comprises a frequency modulation module, a power control module and a power control module, wherein the frequency modulation module is used for calculating a real-time output active power instruction of a wind power plant after frequency modulation, and distributing the real-time output active power instruction of the wind power plant to each wind power generation set according to the maximum available power of each wind power generation set at present;
wind power plant AGC system: the system is used for controlling the wind power plant to output active power and sending the active power output by the wind power plant to the EMS system;
the primary frequency modulation evaluation master station of the dispatching end: the wind power ultra-short-term prediction data is used for executing an active test program of the primary frequency modulation capability of the wind power plant; the method comprises the steps that on-line evaluation of the primary frequency modulation capability of the wind power plant is carried out by obtaining an electric field output power response curve of a synchronous vector measurement unit;
wind power plant end primary frequency modulation response substation: the wind power plant primary frequency modulation active test task set is generated by power grid analog frequency data received from the scheduling end primary frequency modulation evaluation master station through the data communication network shutdown, and active power required to be adjusted by the wind power plant is calculated.
And judging whether to execute the test operation or not by utilizing wind power ultra-short-term prediction data provided by a wind power prediction system of the wind power plant. The time of each test task is 60s, the operating condition (output power) of the wind power plant in 60s needs to meet the requirement of the test task on the operating condition of the wind power plant, the output power of the wind power plant changes constantly, the requirement of the test operating condition can be met in the first 30s, and the requirement of the test operating condition is not met in the last 30s, so that the test operation fails, which is a process which is neglected in the current stage. After the wind power ultra-short term prediction data is introduced, the test operation task is executed when the operation condition of the wind power plant in the future 90s (the margin of 30s is reserved) meets the test requirement. Otherwise, not executing and continuously waiting;
the system realizes the staged transmission of control instruction data and real-time running data (PMU), reduces the bandwidth of a communication channel and improves the rapidity of the whole system; the existing equipment and functions of the wind power plant are fully utilized, and the investment of the system is reduced. The execution task content of each system module is clear, and the alternation and the overlapping of the functions among the system modules are avoided.
The data communication gateway comprises three channels:
PMU data channel: the IEC103 protocol is adopted to realize real-time data transmission between the data communication gateway machine and the primary frequency modulation master station of the scheduling end, and the data precision is 10-100 ms;
telemechanical data channel: a 102 protocol is adopted to realize data communication between the primary frequency modulation master station at the scheduling end and the primary frequency modulation response substation and the AGC system of the wind power plant at the same wind power plant end;
lan network interface hard wired channel: and an IEC104 protocol is adopted to realize data communication between the wind power plant EMS system and the primary frequency modulation response substation and the wind power plant AGC system at the wind power plant end, and the synchronous vector measurement unit is in data communication with the primary frequency modulation response substation at the wind power plant end.
And a visualization unit is arranged on the scheduling end primary frequency modulation evaluation master station.
The embodiment also provides an online active evaluation method for the primary wind power frequency modulation capability of the inland mountainous region, which comprises the following steps:
step 1: sending a substation test condition preparation state query instruction to the wind power plant end primary frequency modulation response substation;
step 2: the wind power plant end primary frequency modulation response substation carries out self-checking, judges whether a substation test condition is met or not according to a self-checking result and the current running state of the wind power plant, and sends a substation test preparation state to the scheduling end primary frequency modulation evaluation main station;
and step 3: if the dispatching end primary frequency modulation evaluation master station receives that the substation test is ready, sending a power grid simulation test frequency message to the wind farm end primary frequency modulation response substation, otherwise, terminating the test;
and 4, step 4: after receiving the power grid simulation test frequency message, the wind power plant end primary frequency modulation response substation analyzes the power grid simulation test frequency message, and automatically generates a wind power plant primary frequency modulation active test operation task set T according to the wind power plant output power condition required by the test, wherein each test operation task in the task set comprises a test project Name (Name) and a power grid simulation frequency time sequence (f)Ti) Time sequence (Ti), wind power plant output power value (Pi) required by test, AGC instruction and logic (SPi) of substation primary frequency modulation adjustment quantity, and sending the wind power plant output power value, AGC instruction and logic (SPi) to a scheduling end primary frequency modulation evaluation main stationTesting the task preparation state of the test operation and the Name and Pi test information of each test operation task in the active test operation task set T; (ii) a
And 5: the dispatching end primary frequency modulation evaluation master station receives that the test job task is not ready, and then the step 13 is carried out; if the dispatching end primary frequency modulation evaluation master station checks that the test tasks in the test job task set T are all completed, turning to step 13; if not, the scheduling end primary frequency modulation evaluation master station judges whether the test condition of the residual test operation tasks in the operation task set T is matched with the current operation condition of the wind power plant or not based on the current operation condition of the wind power plant and the ultra-short-term wind power prediction result;
the test condition of the test operation task is matched with the current wind power plant operation condition, namely the wind power plant ultra-short term wind power predicted value in 90s meets the wind power plant operation condition requirement required by the test condition.
Step 6: if not, after waiting for 60s, returning to the step 5; if the test operation task Ti meets the condition, the test operation task Ti sends the required initial operation power of the wind power plant to the wind power plant AGC systemP AGC0；
And 7: the AGC system of the wind power plant receives the initial operating power of the wind power plantP AGC0Adjusting the output power of the wind farm toP AGC0Then sending the initial operation condition preparation state of the wind power plant to a primary frequency modulation evaluation master station of a scheduling end;
and 8: the scheduling end primary frequency modulation evaluation master station receives that the setting of the initial operation condition of the wind power plant is not ready, and then the step 13 is carried out;
after the primary frequency modulation evaluation master station of the scheduling end is ready according to the received initial operation condition of the setting station, sending a Ti test execution starting signal to the primary frequency modulation response substation of the wind farm end;
and step 9: after the primary frequency modulation response substation at the wind power plant end receives the Ti test starting signal, calculating a wind power plant output power adjustment quantity instruction delta P according to the power grid analog frequency valuerefAnd sends the data to the wind power plant EMS system; simultaneously recording the current time and moment and sending the current time and moment to a primary frequency modulation evaluation master station of a degree end for calculating primary frequency modulation indexes;
step 10: wind farm EMS System based on delta PrefAGC command of wind power plant at current momentP t AGCAnd the previous control periodP t-1 AGCThe value of (a), calculating the wind power plant output active power instruction at the current momentP wind,refThen, calculating the active power instruction of each in-operation wind turbine generator in the wind power plant according to a preset ruleP i g,ref I =1,2, ∙ ∙ ∙, n, i is the wind turbine generator number; n is the number of the wind generation sets in operation of the current wind power plant and is issued to each wind generation set control system;
step 11: after the primary frequency modulation online active test is executed for 60s, waiting for 10s, and sending Ti test ending information to the host by the primary frequency modulation response substation at the wind power plant end;
step 12: after the scheduling end primary frequency modulation evaluation master station receives a Ti test ending signal, acquiring real-time information of the synchronous vector measuring device, and starting a Ti test result evaluation program; meanwhile, returning to the step 6, and continuing to complete other online active test operation tasks;
step 13: the test is terminated.
Calculating wind power plant output power adjustment quantity instruction delta P according to power grid analog frequency valuerefCalculated according to the following formula:
in the formula:frepresenting the power grid simulation frequency value with the unit of Hz;fdrepresenting a primary frequency modulation dead zone with the unit of Hz;f N represents the rated frequency of the system, and has the unit of Hz;Pethe rated capacity of a primary frequency modulation control object is expressed, and the unit is MW; the value range of the new energy primary frequency modulation difference adjustment coefficient is 2-5;fL=50—fd，fH=50+fd。
wind power plant output active power instruction at current momentP wind,refCalculated according to the following formula:
distributing an active power instruction output by the wind power plant in real time to each wind power generator set according to the maximum available power of each wind power generator set at present;
wherein the content of the first and second substances,P i gmaxrepresenting the maximum available power of the ith wind turbine generator set,P i g,ref and representing the real-time active power of the ith wind generating set.
A PMU data channel is adopted between the wind power plant synchronous vector measuring device and the dispatching end primary frequency modulation master station, an IEC103 protocol is adopted to transmit real-time data, and the data precision is 10-100 ms;
a telecontrol data channel is adopted between the primary frequency modulation master station at the dispatching end and the primary frequency modulation response substation at the same wind power plant end as well as the AGC system of the wind power plant, and data communication is carried out based on a 102 protocol;
the wind power plant EMS system and the wind power plant end primary frequency modulation response substation and the wind power plant AGC system are in data communication, the synchronous vector measurement unit and the wind power plant end primary frequency modulation response substation are in data communication through a local area network interface hard wiring, and the data communication is carried out based on an IEC104 protocol.
It should be understood that the functional unit modules in the embodiments of the present invention may be integrated into one processing unit, or each unit module may exist alone physically, or two or more unit modules are integrated into one unit module, and may be implemented in the form of hardware or software.
The embodiment of the invention also provides a readable storage medium, which comprises computer program instructions, and when the computer program instructions are executed by a processing terminal, the processing terminal executes the online active evaluation method for the primary frequency modulation capability of wind power in inland mountainous regions.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. The utility model provides an inland mountain region wind-powered electricity generation primary frequency modulation ability online initiative evaluation system which characterized in that includes:
wind-powered electricity generation field synchronous vector measuring device: the wind power plant booster transformer is arranged on the high-voltage side of the wind power plant booster transformer and used for collecting three-phase fundamental wave voltage, three-phase fundamental wave current and wind power plant active power of a wind power plant grid-connected point in real time and transmitting the three-phase fundamental wave voltage, the three-phase fundamental wave current and the wind power plant active power to a wind power plant end primary frequency modulation substation and a scheduling end primary frequency modulation master station in real time;
data communication gateway machine: the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station are used for transmitting and receiving real-time data information and control instructions of the wind power plant end primary frequency modulation response substation and the scheduling end primary frequency modulation evaluation master station and the wind power plant AGC system in real time;
wind farm EMS System: the system comprises a frequency modulation module, a power control module and a power control module, wherein the frequency modulation module is used for calculating a real-time output active power instruction of a wind power plant after frequency modulation, and distributing the real-time output active power instruction of the wind power plant to each wind power generation set according to the maximum available power of each wind power generation set at present;
wind power plant AGC system: the system is used for controlling the wind power plant to output active power and sending the active power output by the wind power plant to the EMS system;
the primary frequency modulation evaluation master station of the dispatching end: the wind power ultra-short-term prediction data is used for executing an active test program of the primary frequency modulation capability of the wind power plant; the method comprises the steps that on-line evaluation of the primary frequency modulation capability of the wind power plant is carried out by obtaining an electric field output power response curve of a synchronous vector measurement unit;
wind power plant end primary frequency modulation response substation: the wind power plant primary frequency modulation active test task set is generated by power grid analog frequency data received from the scheduling end primary frequency modulation evaluation master station through the data communication network shutdown, and active power required to be adjusted by the wind power plant is calculated.
2. The system of claim 1, wherein the data communication gateway comprises three channels:
PMU data channel: the IEC103 protocol is adopted to realize real-time data transmission between the data communication gateway machine and the primary frequency modulation master station of the scheduling end, and the data precision is 10-100 ms;
telemechanical data channel: a 102 protocol is adopted to realize data communication between the primary frequency modulation master station at the scheduling end and the primary frequency modulation response substation and the AGC system of the wind power plant at the same wind power plant end;
lan network interface hard wired channel: and an IEC104 protocol is adopted to realize data communication between the wind power plant EMS system and the primary frequency modulation response substation and the wind power plant AGC system at the wind power plant end, and the synchronous vector measurement unit is in data communication with the primary frequency modulation response substation at the wind power plant end.
3. The system according to claim 1, wherein the scheduling end primary frequency modulation evaluation master station is provided with a visualization unit.
4. An online active assessment method for wind power primary frequency modulation capability of inland mountains is characterized by comprising the following steps:
step 1: sending a substation test condition preparation state query instruction to the wind power plant end primary frequency modulation response substation;
step 2: the wind power plant end primary frequency modulation response substation carries out self-checking, judges whether a substation test condition is met or not according to a self-checking result and the current running state of the wind power plant, and sends a substation test preparation state to the scheduling end primary frequency modulation evaluation main station;
and step 3: if the dispatching end primary frequency modulation evaluation master station receives that the substation test is ready, sending a power grid simulation test frequency message to the wind farm end primary frequency modulation response substation, otherwise, terminating the test;
and 4, step 4: after receiving the power grid simulation test frequency message, the wind power plant end primary frequency modulation response substation analyzes the power grid simulation test frequency message, automatically generates a wind power plant primary frequency modulation active test operation task set T in combination with the wind power plant output power condition required by the test, and sends the wind power plant test operation task preparation state, the test project names of all test operation tasks in the active test operation task set T and the wind power plant output power required by the test to a scheduling end primary frequency modulation evaluation master station;
and 5: the dispatching end primary frequency modulation evaluation master station receives that the test job task is not ready, and then the step 13 is carried out; if the dispatching end primary frequency modulation evaluation master station checks that the test tasks in the test job task set T are all completed, turning to step 13; if not, the scheduling end primary frequency modulation evaluation master station judges whether the test condition of the residual test operation tasks in the operation task set T is matched with the current operation condition of the wind power plant or not based on the current operation condition of the wind power plant and the ultra-short-term wind power prediction result;
step 6: if not, after waiting for 60s, returning to the step 5; if the test operation task Ti meets the condition, the test operation task Ti sends the required initial operation power of the wind power plant to the wind power plant AGC systemP AGC0；
And 7: the AGC system of the wind power plant receives the initial operating power of the wind power plantP AGC0Adjusting the output power of the wind farm toP AGC0Then sending the initial operation condition preparation state of the wind power plant to a primary frequency modulation evaluation master station of a scheduling end;
and 8: the scheduling end primary frequency modulation evaluation master station receives that the setting of the initial operation condition of the wind power plant is not ready, and then the step 13 is carried out;
after the primary frequency modulation evaluation master station of the scheduling end is ready according to the received initial operation condition of the setting station, sending a Ti test execution starting signal to the primary frequency modulation response substation of the wind farm end;
and step 9: after the primary frequency modulation response substation at the wind power plant end receives the Ti test starting signal, calculating a wind power plant output power adjustment quantity instruction delta P according to the power grid analog frequency valuerefIn parallel withSending the data to an EMS system of a wind power plant; simultaneously recording the current time and moment and sending the current time and moment to a primary frequency modulation evaluation master station of a degree end for calculating primary frequency modulation indexes;
step 10: wind farm EMS System based on delta PrefAGC command of wind power plant at current momentP t AGCAnd the previous control periodP t -1 AGCThe value of (a), calculating the wind power plant output active power instruction at the current momentP wind,refThen, calculating the active power instruction of each in-operation wind turbine generator in the wind power plant according to a preset ruleP i g,ref I =1,2, ∙ ∙ ∙, n, i is the wind turbine generator number; n is the number of the wind generation sets in operation of the current wind power plant and is issued to each wind generation set control system;
step 11: after the primary frequency modulation online active test is executed for 60s, waiting for 10s, and sending Ti test ending information to the host by the primary frequency modulation response substation at the wind power plant end;
step 12: after the scheduling end primary frequency modulation evaluation master station receives a Ti test ending signal, acquiring real-time information of the synchronous vector measuring device, and starting a Ti test result evaluation program; meanwhile, returning to the step 6, and continuing to complete other online active test operation tasks;
step 13: the test is terminated.
5. Method according to claim 4, characterized in that the wind farm output power adjustment quantity command Δ P is calculated from the grid analogue frequency valuerefCalculated according to the following formula:
in the formula:frepresenting the power grid simulation frequency value with the unit of Hz;fdrepresenting a primary frequency modulation dead zone with the unit of Hz;f N represents the rated frequency of the system, and has the unit of Hz;Pethe rated capacity of a primary frequency modulation control object is expressed, and the unit is MW; representing a primary frequency modulation difference adjustment coefficient of new energy;fL=50—fd，fH=50+fd。
6. method according to claim 4, characterized in that the wind farm outputs an active power command at the current momentP wind,refCalculated according to the following formula:
7. the method of claim 6, wherein the real-time output active power instruction of the wind power plant is distributed to the wind power sets according to the maximum available power of the current wind power sets;
wherein the content of the first and second substances,P i gmaxrepresenting the maximum available power of the ith wind turbine generator set,P i g,ref and representing the real-time active power of the ith wind generating set.
8. The method according to claim 4, characterized in that a PMU data channel is adopted between the wind farm synchronous vector measuring device and the dispatching end primary frequency modulation master station, real-time data is transmitted by adopting an IEC103 protocol, and the data precision is 10-100 ms;
a telecontrol data channel is adopted between the primary frequency modulation master station at the dispatching end and the primary frequency modulation response substation at the same wind power plant end as well as the AGC system of the wind power plant, and data communication is carried out based on a 102 protocol;
the wind power plant EMS system and the wind power plant end primary frequency modulation response substation and the wind power plant AGC system are in data communication, the synchronous vector measurement unit and the wind power plant end primary frequency modulation response substation are in data communication through a local area network interface hard wiring, and the data communication is carried out based on an IEC104 protocol.
9. The method according to claim 4, wherein the matching of the test conditions of the test work task and the current wind farm operation conditions means that the wind farm ultra-short term wind power predicted values within 90s all meet the wind farm operation condition requirements required by the test conditions.
10. A readable storage medium comprising computer program instructions, characterized in that the computer program instructions, when executed by a processing terminal, cause the processing terminal to perform the method of any of claims 4 to 9.
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