CN112564129A - Generator set control method and device based on primary frequency modulation - Google Patents
Generator set control method and device based on primary frequency modulation Download PDFInfo
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The embodiment of the specification provides a generating set control method and device based on primary frequency modulation. The method comprises the following steps: under the condition of receiving a primary frequency modulation signal, calculating a frequency modulation load according to the frequency difference of a power grid; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference; combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load; adjusting the comprehensive load quantity based on the actual load of the generator set to obtain a frequency modulation feedforward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set; adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate a frequency modulation instruction of the generator set; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation. The method realizes the rapid and accurate implementation of primary frequency modulation and ensures the stable operation of the power grid.
Description
Technical Field
The embodiment of the specification relates to the technical field of electricity, in particular to a generating set control method and device based on primary frequency modulation.
Background
With the construction of extra-high voltage transmission, wind power generation, solar power generation and the like, the scale of a power grid constructed in China is enlarged, the structure of a regional power grid is more and more complex, and the requirement on safe and stable operation of the power grid is higher and higher. In actual operation of the power grid, when the power consumption does not match the power supply, a certain change of the power grid frequency may occur. When the frequency exceeds the limited range, the safety and economic benefits of a power system, a generator set and a user are affected, and in severe cases, the impact on a power grid or the disruption of the power grid can be caused.
In order to ensure the stability of the grid frequency, the grid frequency may be adjusted by using a primary frequency modulation method. Because the generator set has larger rotational inertia in the operation process, after the response is made based on the change condition of the power grid frequency, the energy storage of the generator set can be released to provide support for the recovery of the power grid frequency. However, since the primary modulation has a high requirement for the response time, the longer the response time of the primary modulation, the worse the frequency modulation effect is obtained. Therefore, how to utilize the primary frequency modulation has important significance on realizing rapid recovery of the power grid frequency.
Disclosure of Invention
An object of an embodiment of the present specification is to provide a generator set control method and apparatus based on primary frequency modulation, so as to solve a problem how to implement fast recovery of a power grid frequency by using primary frequency modulation.
In order to solve the technical problem, an embodiment of the present specification provides a generator set control method based on primary frequency modulation, where the method includes: under the condition of receiving a primary frequency modulation signal, calculating a frequency modulation load according to the frequency difference of a power grid; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference; combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load; adjusting the comprehensive load quantity based on the actual load of the generator set to obtain a frequency modulation feedforward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set; adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate a frequency modulation instruction of the generator set; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
The embodiment of this specification still provides a generating set controlling means based on primary frequency modulation, includes: the frequency modulation load calculation module is used for calculating the frequency modulation load according to the frequency difference of the power grid under the condition of receiving the primary frequency modulation signal; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference; the comprehensive load quantity acquisition module is used for combining the primary frequency modulation signal and the frequency modulation load quantity to obtain a comprehensive load quantity; the frequency modulation feed-forward quantity acquisition module is used for adjusting the comprehensive load quantity based on the actual load of the generator set to obtain frequency modulation feed-forward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set; the generating set frequency modulation instruction generating module is used for adjusting the original control instruction of the generating set by using the frequency modulation feed forward quantity to generate a generating set frequency modulation instruction; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
According to the technical scheme provided by the embodiment of the specification, based on the primary frequency modulation signal, the frequency modulation load is calculated according to the frequency difference of the power grid, the primary frequency modulation signal and the frequency modulation load are combined to obtain the comprehensive load, and the comprehensive load is adjusted based on the actual load of the engine unit to obtain the frequency modulation feed forward quantity of the actual running state of the load engine unit, so that the original control instruction of the generator unit can be adjusted based on the frequency modulation feed forward quantity, the adjusted frequency modulation instruction of the generator unit can adjust the generator unit, and the generator unit can realize primary frequency modulation by releasing the energy storage of the generator unit. The signal is prevented from being additionally transmitted in the primary frequency modulation process, the response time of the primary frequency modulation is shortened, and the accuracy of the primary frequency modulation result is also guaranteed by integrating the frequency difference, the primary frequency modulation signal and the load of the generator set to realize the calculation of the frequency modulation feed forward quantity, so that the rapid and accurate primary frequency modulation is realized, and the stable operation of a power grid is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for controlling a generator set based on primary frequency modulation according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a primary tuning logic timing sequence according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a signal transmission flow of a generator set control method according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a control device of a generator set based on primary frequency modulation according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present specification without any creative effort shall fall within the protection scope of the present specification.
The frequency of the power grid is determined by the generated power and the power load, and when the generated power is equal to the power load, the frequency of the power grid is stable; when the generated power is greater than the electricity load, the frequency of the power grid is increased; when the generated power is less than the power load, the frequency of the power grid is reduced. And the power generation peak time of new energy power generation modes such as wind power generation, solar power generation and the like and the power utilization peak time of a power grid may not correspond to each other, so that the situation that the generated energy is not matched with the power consumption of a user is easily caused, the power grid frequency deviates from the preset power grid frequency, and further certain influence is caused on user experience or the power grid.
The primary frequency modulation refers to an automatic control process that once the frequency of the power grid deviates from a rated value, a control system of a unit in the power grid automatically controls the increase and decrease of the active power of the unit, limits the change of the power grid frequency and enables the power grid frequency to be stable. When the frequency of the power grid is increased, the primary frequency modulation function requires the unit to utilize the heat storage of the unit to quickly reduce the load, and otherwise, the unit quickly increases the load.
However, since more logic calculation and information interaction processes are involved in the primary frequency modulation process, if more time is consumed in the process of executing the primary frequency modulation, more time is easily consumed when the primary frequency modulation is completed, so that an effective compensation effect may not be achieved, and even a situation of reverse compensation occurs, which affects the stability of the power grid. Therefore, how to ensure the response speed of the primary frequency modulation process is an important factor for maintaining the stability of the power grid.
In order to solve the technical problem, an embodiment of the present specification provides a generator set control method based on primary frequency modulation. The execution main body of the primary frequency modulation-based generator set control method is a primary frequency modulation-based generator set control device, and specifically, the execution main body of the primary frequency modulation-based generator set control method can be a DEH (steam turbine digital electro-hydraulic) controller. As shown in fig. 1, the method for controlling a generator set based on primary frequency modulation specifically includes the following steps.
S110: under the condition of receiving a primary frequency modulation signal, calculating a frequency modulation load according to the frequency difference of a power grid; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a genset load corresponding to the frequency difference.
A primary frequency modulated signal is a signal that is generated when a primary frequency modulation is required. After the execution main body of the method detects the primary frequency modulation signal, primary frequency modulation can be carried out based on the primary frequency modulation signal.
The primary frequency modulation signal may be a signal generated when the frequency difference exceeds a dead zone of the primary frequency modulation by detecting a frequency difference between an actual frequency of the power grid and a rated frequency of the power grid and comparing the frequency difference with a dead zone size of the primary frequency modulation. The dead band of the primary frequency modulation can be set to [ -0.033,0.033] Hz, for example, and when the frequency difference exceeds this range, a corresponding primary frequency modulation signal can be generated for adjusting the frequency of the power grid.
It should be noted that, in the case that the primary frequency modulation process is executed by a DEH controller, the primary frequency modulation signal may be generated by a device or equipment other than the DEH controller, or may be generated by a corresponding module provided by the DEH controller itself, for example, the corresponding module is provided to determine a frequency difference between an actual frequency and a rated frequency of a power grid in real time, and determine whether the frequency difference exceeds a range of a primary frequency modulation dead zone. Correspondingly, the DEH controller can be provided with a corresponding module for directly detecting whether the module generates a corresponding primary frequency modulation signal, so that the transmission process of the signal is reduced, and the detection process of the primary frequency modulation signal is accelerated.
In some embodiments, in order to reduce the response time of the primary frequency modulation and ensure that the primary frequency modulation signal is acquired as soon as possible, the primary frequency modulation signal may be scanned based on a preset scanning period. The preset scanning period may be set based on the state of the device itself and the need for the primary chirp generation time. For example, the scanning period for the primary frequency modulation signal in the normal state is set to 200ms, and in the present embodiment, the preset scanning period for the primary frequency modulation signal may be set to 50ms, so that the frequency change condition in the power grid can be responded in time.
When the DEH controller is used as an execution body to execute the method, the DEH controller may include a plurality of logical pages, where the logical pages are used to execute corresponding processing logic, for example, a logical page a is used to implement primary frequency modulation, and a logical page B is used to implement stop of the steam turbine set. In practical applications, the logical pages in the DEH controller may correspond to a corresponding logical page sequence, where the logical page sequence is used to identify an execution sequence of different logical pages when the DEH controller is applied.
In some embodiments, the first logical page in the logical page sequence may be directly set as a logical page for detecting a primary frequency modulation signal, that is, when the DEH controller executes a corresponding service based on the logical page sequence, the DEH controller preferentially completes detection of the primary frequency modulation signal, so that after the primary frequency modulation signal is generated, the primary frequency modulation signal can be detected as soon as possible to execute a corresponding primary frequency modulation process, thereby avoiding interference of other logic to be executed on the primary frequency modulation signal detection process.
Under the condition of receiving the primary frequency modulation signal, the frequency modulation load quantity can be calculated according to the frequency difference of the power grid.
The frequency difference is the difference between the rated frequency and the actual frequency of the power grid. The nominal frequency may be a frequency preset for the grid, typically set to 50 Hz. The actual frequency is the power of the power grid in actual operation, and is influenced by the power load or the power generation amount, and the actual frequency may have certain fluctuation, so that a frequency difference is generated between the actual frequency and the rated frequency.
In some embodiments, the frequency difference may be calculated in real time, so that after receiving the primary frequency modulation signal, the corresponding adjustment can be performed directly based on the frequency difference calculated in real time, thereby increasing the response speed of the primary frequency modulation.
And the frequency modulation load is the load of the generator set corresponding to the frequency difference, and the corresponding frequency modulation load is determined according to the size of the frequency difference. Specifically, the frequency difference may be converted into a corresponding frequency modulation load by a step-by-step unequal ratio. As shown in fig. 2, after the frequency difference is acquired, the frequency difference is sequentially input to F1(x)、F2(x) And F3(x) Wherein, by F1(x) Converted to basic frequency-modulated load, F2(x) And F3(x) The calculated load needs to be processed through a quick-action slow-return link. The quick action slow return link is used for comparing whether the frequency difference exceeds the dead zone to judge the state and the action direction of primary frequency modulation so as to realize primary frequency modulation actionThe frequency modulation method has the advantages that the response is fast, the recovery is slow, the integral electric quantity in the frequency modulation process is improved, and the response time of primary frequency modulation is shortened. The positive and negative frequency modulation load quantities can be obtained after the processing based on the quick action slow return link, so that the combination can be carried out in the subsequent steps to obtain the final frequency modulation load quantity.
S120: and combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load.
And combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load. The comprehensive load capacity is obtained by combining different frequency modulation load capacities.
In some embodiments, based on the example in step S110, after the corresponding positive and negative fm loads are obtained by frequency difference calculation according to the piecewise unequal rate manner, the positive fm load, the negative fm load, and the base load may be correspondingly combined with the primary fm signal to obtain the integrated load. The positive frequency modulation load comprises a load calculated based on a positive primary frequency modulation dead zone and an actual frequency difference, and the negative frequency modulation load comprises a load calculated based on a negative primary frequency modulation dead zone and an actual frequency difference.
Specifically, based on the example corresponding to fig. 2, the actual power of the generator set may be calculated based on the primary frequency modulation signal to obtain a corresponding calculation result, the calculation result is sequentially calculated as the minimum value between the basic frequency modulation load and the positive frequency modulation load, and finally the calculation result and the negative frequency modulation load are accumulated to obtain the final comprehensive load.
By calculating the comprehensive load, the influence of the positive direction and the negative direction of the frequency difference of the power grid on the actual primary frequency modulation state and action is comprehensively considered, the adjustment of the engine set is ensured to meet the requirement of practical application, and the accuracy of the primary frequency modulation process is improved.
S130: adjusting the comprehensive load quantity based on the actual load of the generator set to obtain a frequency modulation feedforward quantity; the frequency modulation feed forward quantity is used for representing the size of the comprehensive valve position adjusted for the generator set.
After the comprehensive load amount is obtained, the comprehensive load amount can be adjusted by combining the actual load of the engine unit. In the actual operation process, the comprehensive valve positions corresponding to different load sections of the engine unit are different, and the interception capacities of the corresponding different comprehensive valve positions are different. If the comprehensive load quantity is directly used for adjusting the engine unit, the comprehensive load quantity can not be matched with the actual running state of the engine, so that the conditions of overshoot or undershoot and the like occur.
Thus, in some embodiments, after the integrated load is obtained, the integrated load may be adjusted using multi-model predictive control. Specifically, a speed regulation module may be preset, where the speed regulation module includes a plurality of speed regulation units, and each speed regulation unit sequentially corresponds to a corresponding load of the generator set, for example, the load may be 90% load, 80% load, 70% coincidence, and the like, which is not limited herein. Accordingly, different speed control units have different control functions for different loads.
Before the comprehensive load quantity is adjusted by utilizing the multi-model predictive control, the corresponding speed regulating unit can be activated based on the load of the engine unit. The speed regulating units in the speed regulating module are connected in series, and the comprehensive load quantity can sequentially pass through the speed regulating units after being input into the speed regulating module. Wherein the speed regulating unit which is not activated does not influence the comprehensive load amount. And in the process that the comprehensive load quantity sequentially passes through each speed regulating unit, only the activated speed regulating unit can regulate the comprehensive load quantity. The structure enables the signal corresponding to the comprehensive load quantity to pass through the speed regulating module only once under different conditions, so that the comprehensive load quantity can be regulated into the frequency modulation feedforward quantity, the condition that the comprehensive load quantity is regulated in sequence based on the load of the generator set under different conditions is avoided, corresponding execution steps are reduced, and the response speed of primary frequency modulation is accelerated.
As shown in fig. 2, corresponding speed regulating units are respectively arranged for loads of 60%, 70%, 80% and 90%, after the comprehensive load is input into the speed regulating module, the activated speed regulating units are used for regulating the comprehensive load to obtain corresponding frequency modulation feed forward quantities, so that the response speed of primary frequency modulation is accelerated while the frequency modulation feed forward quantities are ensured to be in accordance with the actual operation load of the unit, and a fast and accurate primary frequency modulation process is realized.
S140: adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate a frequency modulation instruction of the generator set; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
After the frequency modulation feed forward quantity is obtained, the original control instruction of the generator set can be adjusted by using the frequency modulation feed forward quantity. The original control instructions may be instructions generated based on the original operating conditions of the generator set. In order to realize primary frequency modulation by using the generator set, the instruction of the generator set needs to be adjusted, so that the generator set releases/stores energy storage, and further, the frequency of the power grid is adjusted.
The specific adjustment mode may be directly superimposing the frequency modulation feed forward quantity and an original control instruction of the generator set, so as to generate the frequency modulation instruction of the generator set, and the original control instruction may also be adjusted in other modes in practical application, which is not described herein again.
And the generator set frequency modulation instruction is the adjusted instruction. The generator set frequency modulation instruction is used for adjusting the load of the generator set and releasing or storing corresponding energy storage, so that the power grid frequency is adjusted to return to the range of a primary frequency modulation dead zone, and the stability of the power grid frequency is maintained.
In some embodiments, a pressure correction value may also be generated to correct the fm feed forward amount prior to generating a genset fm command using the fm feed forward amount. In the generator set, because the steam work capacities corresponding to the main steam pressure are different, in order to inhibit the adverse effect of the main steam pressure fluctuation on the frequency modulation effect, the pressure deviation can be compensated by adjusting the DEH feedforward quantity so as to improve the adjustment quality of primary frequency modulation.
Specifically, the pressure correction value may be generated based on the main steam pressure and the pressure setting of the generator set, for example, the pressure setting may be divided by the main steam pressure, and the calculation result may be adjusted by a predetermined calculation method to obtain the pressure correction value.
After the pressure correction value is obtained, the frequency modulation feedforward value may be corrected by using the pressure correction value, so that the corrected frequency modulation feedforward value is used to adjust the original control instruction of the generator set to generate the frequency modulation instruction of the generator set, and the specific instruction generation method may refer to the description in the foregoing steps, and is not described herein again.
The frequency modulation feed-forward quantity is corrected through the pressure correction value, so that the influence caused by main steam pressure fluctuation can be considered in the corrected result, and the accuracy of the primary frequency modulation process is ensured.
In some embodiments, before generating the genset frequency modulation command using the frequency modulation feed forward quantity, a time correction value may also be generated to correct the frequency modulation feed forward quantity. Along with the increase of the duration time of the primary frequency modulation action, the stored energy of the unit is continuously released or stored, and the frequency modulation capability of the unit is continuously changed along with the duration time of the frequency modulation action, so that the integral electric quantity of the unit can be improved by utilizing the time correction value to adjust, and the response effect of the generator set on the long-time primary frequency modulation action is enhanced.
Specifically, the time correction value may be generated based on the primary frequency modulation signal, for example, as shown in fig. 2, the primary frequency modulation signal may be delayed for 15 seconds and then calculated accordingly to be the final time correction value.
After the time correction value is obtained, the frequency modulation feedforward value can be corrected by using the time correction value, so that the original control instruction of the generator set can be adjusted by using the corrected frequency modulation feedforward quantity to generate a frequency modulation instruction of the generator set, and a specific instruction generating method can refer to the description in the previous step and is not described herein again.
The frequency modulation feed-forward quantity is corrected through the time correction value, so that the integral electric quantity of the generator set can be improved according to the corrected result, the generator set is ensured to still have the primary frequency modulation capability in the long-time primary frequency modulation process, and the response capability of the system for different conditions is improved.
In practical applications, the frequency modulation feed forward amount may be corrected by one of the pressure correction value and the time correction value, or by both the pressure correction value and the time correction value, which is not limited herein.
In some embodiments, signal values corresponding to parameters such as actual frequency, actual load, main steam pressure, pressure setting, etc. may be hard-wired into the execution entity of the method, such as the DEH controller. The hard wiring is a traditional way of transmitting signals through a line, the characteristics of signal transmission are rapid and accurate, meanwhile, the hard wiring is used for avoiding more transfer processes of the signals in the transmission process, so that the transmission speed of the signals is improved, and the response speed of primary frequency modulation is correspondingly accelerated.
In addition, it should be additionally noted that the sequence numbers in the respective steps in fig. 2 correspond to the execution sequence of the respective steps in the schematic diagram, so as to optimize the sequence of the primary frequency modulation execution process.
A scenario example of the method, in which signal values corresponding to the actual frequency, the actual load, the main steam pressure and the pressure setting are input to the DEH controller, is explained below with reference to fig. 3. For the DEH controller, the logic in the DEH controller may be integrated first, with the logic scanning the primary fm signal being performed first. And then the scanning period of the primary frequency modulation signal is shortened, and the scanning speed is accelerated. And then, sequencing the logic pages and the logic blocks, and optimizing the execution logic of the primary frequency modulation. After the signals are input into the DEH controller, the DEH controller outputs comprehensive valve position feed-forward quantity, and the comprehensive valve position feed-forward quantity is combined with a power loop comprehensive valve position command to generate a comprehensive valve position command, so that primary frequency modulation can be realized by using the comprehensive valve position command, and the stability of a power grid is guaranteed.
According to the introduction of the embodiment of the engine unit control method and the description of the scene example, the method is based on the primary frequency modulation signal, firstly, the frequency modulation load is calculated according to the frequency difference of the power grid, the primary frequency modulation signal and the frequency modulation load are combined to obtain the comprehensive load, then, the comprehensive load is adjusted based on the actual load of the engine unit to obtain the frequency modulation feed-forward quantity of the actual running state of the load generator unit, so that the original control instruction of the generator unit can be adjusted based on the frequency modulation feed-forward quantity, the adjusted frequency modulation instruction of the generator unit can adjust the generator unit, and the generator unit can realize primary frequency modulation by releasing the energy storage of the generator unit. The signal is prevented from being additionally transmitted in the primary frequency modulation process, the response time of the primary frequency modulation is shortened, and the accuracy of the primary frequency modulation result is also guaranteed by integrating the frequency difference, the primary frequency modulation signal and the load of the generator set to realize the calculation of the frequency modulation feed forward quantity, so that the rapid and accurate primary frequency modulation is realized, and the stable operation of a power grid is guaranteed.
Based on the primary frequency modulation-based generator set control method, the embodiment of the specification further provides a primary frequency modulation-based generator set control device. As shown in fig. 4, the primary frequency modulation-based genset control apparatus may include the following modules.
The frequency modulation load calculation module 410 is configured to calculate a frequency modulation load according to a frequency difference of a power grid when the primary frequency modulation signal is received; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference;
a comprehensive load obtaining module 420, configured to combine the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load;
a frequency modulation feed forward quantity obtaining module 430, configured to adjust the comprehensive load quantity based on the actual load of the generator set to obtain a frequency modulation feed forward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set;
the generating set frequency modulation instruction generating module 440 is configured to adjust the original generating set control instruction by using the frequency modulation feed forward quantity to generate a generating set frequency modulation instruction; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
While the process flows described above include operations that occur in a particular order, it should be appreciated that the processes may include more or less operations that are performed sequentially or in parallel (e.g., using parallel processors or a multi-threaded environment).
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 specification. 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.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description 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 so forth) having computer-usable program code embodied therein.
The embodiments of this specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The described embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A generator set control method based on primary frequency modulation is characterized by comprising the following steps:
under the condition of receiving a primary frequency modulation signal, calculating a frequency modulation load according to the frequency difference of a power grid; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference;
combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load;
adjusting the comprehensive load quantity based on the actual load of the generator set to obtain a frequency modulation feedforward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set;
adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate a frequency modulation instruction of the generator set; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
2. The method of claim 1, wherein the method is performed by a steam turbine digital electrohydraulic controller.
3. The method of claim 2, wherein said turbine digital electrohydraulic controller includes at least one logical page; the logical pages are used for executing corresponding processing logic; and the first bit of the logic page sequence corresponding to the logic page is a logic page for detecting the primary frequency modulation signal.
4. The method of claim 1, wherein before calculating the frequency modulation load according to the frequency difference of the power grid in case of receiving the primary frequency modulation signal, further comprising:
and scanning the primary frequency modulation signal based on a preset scanning period.
5. The method of claim 1, wherein the frequency modulated load comprises a basic frequency modulated load, a positive frequency modulated load, and a negative frequency modulated load; the positive frequency modulation load comprises a load calculated based on a positive primary frequency modulation dead zone and an actual frequency difference; the negative frequency modulation load comprises a load calculated based on a negative primary frequency modulation dead zone and an actual frequency difference;
the step of combining the primary frequency modulation signal and the frequency modulation load to obtain a comprehensive load comprises the following steps:
and obtaining a comprehensive load quantity based on the combination of the speed-action slow return and the actual load, the basic frequency modulation load quantity, the positive frequency modulation load quantity, the negative frequency modulation load quantity and the primary frequency modulation signal.
6. The method of claim 1, wherein the adjusting the combined load amount based on the actual load of the generator set to obtain a frequency modulated feed forward amount comprises:
activating a speed regulating unit corresponding to the rated load in a speed regulating module; the speed regulating module comprises at least one speed regulating unit connected in series; the speed regulating module is used for adapting the comprehensive load quantity to the rated load;
inputting the comprehensive load quantity into a speed regulating module to obtain a frequency modulation feedforward quantity; wherein the speed regulating unit which is not activated does not influence the comprehensive load amount.
7. The method of claim 1, wherein prior to adjusting the genset raw control command using the fm feed forward to generate the genset fm command, further comprising:
setting a generated pressure correction value by using the main steam pressure and the pressure of the generator set; the pressure correction value is used for inhibiting the influence of main steam pressure fluctuation on the frequency modulation effect;
correcting the frequency modulation feed forward quantity by using the pressure correction value;
correspondingly, the adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate the frequency modulation instruction of the generator set comprises:
and adjusting the original control instruction of the generator set by using the corrected frequency modulation feedforward quantity to generate a frequency modulation instruction of the generator set.
8. The method of claim 1, wherein prior to adjusting the genset raw control command using the fm feed forward to generate the genset fm command, further comprising:
generating a time correction value based on the primary frequency modulation signal; the time correction value is used for enhancing the response effect of the generator set on the primary frequency modulation signal;
correcting the frequency modulation feed forward quantity by using the time correction value;
correspondingly, the adjusting the original control instruction of the generator set by using the frequency modulation feed forward quantity to generate the frequency modulation instruction of the generator set comprises:
and adjusting the original control instruction of the generator set by using the corrected frequency modulation feedforward quantity to generate a frequency modulation instruction of the generator set.
9. Method according to any of claims 1, 5, 7, 8, characterized in that the signal values for the actual frequency, actual load, main steam pressure, pressure setting are input by hard wiring.
10. The utility model provides a generating set controlling means based on primary frequency modulation which characterized in that includes:
the frequency modulation load calculation module is used for calculating the frequency modulation load according to the frequency difference of the power grid under the condition of receiving the primary frequency modulation signal; the frequency difference comprises a difference value between a rated frequency and an actual frequency of the power grid; the frequency modulation load comprises a generator set load corresponding to the frequency difference;
the comprehensive load quantity acquisition module is used for combining the primary frequency modulation signal and the frequency modulation load quantity to obtain a comprehensive load quantity;
the frequency modulation feed-forward quantity acquisition module is used for adjusting the comprehensive load quantity based on the actual load of the generator set to obtain frequency modulation feed-forward quantity; the frequency modulation feed forward quantity is used for representing the size of the adjusted comprehensive valve position for the generator set;
the generating set frequency modulation instruction generating module is used for adjusting the original control instruction of the generating set by using the frequency modulation feed forward quantity to generate a generating set frequency modulation instruction; and the generator set frequency modulation instruction is used for controlling the generator set to realize primary frequency modulation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472852A (en) * | 2019-09-06 | 2020-07-31 | 内蒙古大唐国际托克托发电有限责任公司 | Intermediate point enthalpy value frequency modulation based logical optimization method for generator set |
| CN113757909A (en) * | 2021-11-08 | 2021-12-07 | 国网浙江省电力有限公司绍兴供电公司 | Air conditioner cluster control method based on quantum encryption technology |
| CN113970699A (en) * | 2021-09-09 | 2022-01-25 | 北京华科同和科技有限公司 | Main steam pressure deviation correction method and device in primary frequency modulation disturbance test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410857A (en) * | 2016-04-08 | 2017-02-15 | 国网天津市电力公司 | Unit generating set primary frequency modulation function realization method |
| CN107807515A (en) * | 2017-10-20 | 2018-03-16 | 国网新疆电力公司电力科学研究院 | Fired power generating unit Xinhua control system primary frequency modulation logic optimization method |
| CN109802416A (en) * | 2019-01-07 | 2019-05-24 | 国网新疆电力有限公司电力科学研究院 | The method for improving Turbo-generator Set DEH primary frequency modulation performance |
| JP2019115249A (en) * | 2017-12-25 | 2019-07-11 | 赫普科技発展（北京）有限公司 | Method, apparatus, and system for frequency modulation in power grid |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
-
2020
- 2020-11-20 CN CN202011311514.0A patent/CN112564129A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410857A (en) * | 2016-04-08 | 2017-02-15 | 国网天津市电力公司 | Unit generating set primary frequency modulation function realization method |
| CN107807515A (en) * | 2017-10-20 | 2018-03-16 | 国网新疆电力公司电力科学研究院 | Fired power generating unit Xinhua control system primary frequency modulation logic optimization method |
| JP2019115249A (en) * | 2017-12-25 | 2019-07-11 | 赫普科技発展（北京）有限公司 | Method, apparatus, and system for frequency modulation in power grid |
| CN109802416A (en) * | 2019-01-07 | 2019-05-24 | 国网新疆电力有限公司电力科学研究院 | The method for improving Turbo-generator Set DEH primary frequency modulation performance |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
Non-Patent Citations (1)
| Title |
|---|
| 安子健: "东方锅炉1000MW超超临界机组自动控制系统改进设计", 《中国优秀硕士学位论文数据库 电子期刊》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472852A (en) * | 2019-09-06 | 2020-07-31 | 内蒙古大唐国际托克托发电有限责任公司 | Intermediate point enthalpy value frequency modulation based logical optimization method for generator set |
| CN111472852B (en) * | 2019-09-06 | 2023-02-17 | 内蒙古大唐国际托克托发电有限责任公司 | Intermediate point enthalpy value frequency modulation based logical optimization method for generator set |
| CN113970699A (en) * | 2021-09-09 | 2022-01-25 | 北京华科同和科技有限公司 | Main steam pressure deviation correction method and device in primary frequency modulation disturbance test |
| CN113757909A (en) * | 2021-11-08 | 2021-12-07 | 国网浙江省电力有限公司绍兴供电公司 | Air conditioner cluster control method based on quantum encryption technology |
| CN113757909B (en) * | 2021-11-08 | 2022-02-08 | 国网浙江省电力有限公司绍兴供电公司 | Air conditioner cluster control method based on quantum encryption technology |
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