Background
The pumped storage power station is responsible for the tasks of peak load regulation, frequency modulation, phase modulation, emergency standby, black start and system capacity standby in a power grid, so that the pumped storage power station plays an important role in improving the efficiency and the energy utilization rate of a power system. When the pumped storage power station is in use, particularly in the process of operating condition conversion and transition in operation, the pumped storage unit can be frequently started and stopped and the operating condition conversion is frequently carried out. If any equipment parameter is abnormal in the transition process of working condition conversion, the power station is in an unstable state, and the safety of the power station is damaged, so that the safety threshold value parameter of the equipment in the pumped storage power station is a barrier for realizing advanced safety protection.
With the development of large-scale development and utilization of new energy sources and smart power grids in China, the construction of pumped storage power stations is accelerated, and the configuration of the pumped storage power stations is gradually developed from a single power load center to multiple aspects such as a power load center, an energy base, a delivery end and a grounding end. Construction and dispatching operation of the pumped storage power station are well performed, new energy resources are favorably utilized, and comprehensive benefits of a power system are favorably improved. In recent years, with the development of technology, the production management requirements of pumped storage power stations are more and more intelligentized and digitalized, and the accurate control of the real-time operation condition of the pumped storage power stations is particularly important for the production operation of the power stations.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention aims to provide a method and a system for processing power generation and water pumping capacity data of a pumped storage power station, which can effectively manage the safety and the energy efficiency of a pumped storage power station system.
In order to achieve the above object, an embodiment of the present invention provides a method for processing data of power generation and water pumping capacity of a pumped storage power station, including:
the following parameters are determined by the receiving end: an upper warehouse initial storage capacity A1, a lower warehouse initial storage capacity A3, an upper warehouse maximum storage capacity A5, an upper warehouse minimum storage capacity A6, a lower warehouse maximum storage capacity A7, a lower warehouse minimum storage capacity A8, an upper warehouse revelation water level S1 and a lower warehouse initial water level S3; determining a storage capacity curve table according to the parameters through an information management system;
determining the power generation flow L1 at the rated power of a single machine, the water pumping flow L2 at the rated power of the single machine, the number of hours of power generation T1 and the number of hours of water pumping T2;
determining the electricity generating capacity P1 according to a storage capacity curve table and the electricity generating flow L1 at the rated power of a single machine; and determining the electric quantity P2 capable of pumping water according to a reservoir capacity curve table and the water pumping flow L2 at the rated power of the single machine.
In some embodiments, the determining the amount of power that can be generated P1 according to the library capacity curve and the power generation flow L1 at the rated power of the single machine includes:
in the case of power generation, if the initial storage capacity A1-the minimum storage capacity A6> the maximum storage capacity A7-the initial storage capacity A3,
T1=(A7-A3)/3600/L1×10000
if the starting capacity of the upper library A1-the minimum capacity of the upper library A6< the maximum capacity of the lower library A7-the starting capacity of the lower library A3,
T1=(A1-A6)/3600/L1×10000
wherein, P1 is T1 multiplied by the rated capacity of a single unit/10; wherein the unit of the storage capacity A is ten thousand meters3Flow L1 is given by m3And/s, the rated capacity unit of a single unit is MW, the T1 unit is Hr, and the P1 unit is ten thousand kWh.
In some embodiments, the determining the water pumping electric quantity P2 according to the reservoir capacity curve table and the water pumping flow L2 at the rated power of the single machine comprises:
under the condition of pumping water, if the initial storage capacity A3 of the lower storage, the minimum storage capacity A8 of the lower storage, the maximum storage capacity A5 of the upper storage, the initial storage capacity A1 of the upper storage,
T2=(A5-A1)/3600/L2×10000
if the lower library starting capacity A3-lower library minimum capacity A8< upper library maximum capacity a 5-upper library starting capacity a1,
T2=(A3-A8)/3600/L2×10000
wherein, P2 is T2 multiplied by the rated capacity of a single unit/10; the unit of the storage capacity A is ten thousand m3, the unit of the flow L2 is m3/s, the unit of the rated capacity of a single unit is MW, the unit of T2 is Hr, and the unit of P2 is ten thousand kWh.
In some embodiments, the method further comprises:
and storing the calculation result in a real-time database.
In some embodiments, the method further comprises:
and the power generation and water pumping capacity of each pumped storage power station is shown through a curve or a column diagram or a table.
The embodiment of the invention also provides a pumped storage power station power generation and pumping capacity data processing system, which comprises: the system comprises a receiving end deployed in a production control area, a physical isolation device and an information management system deployed in an information management large area; the receiving end is connected with the information management system through physical isolation equipment; the physical isolation equipment is used for realizing physical isolation between the production control area and the information management large area;
wherein the following parameters are determined by the receiving end deployed at the receiving end of the production control area: an upper warehouse initial storage capacity A1, a lower warehouse initial storage capacity A3, an upper warehouse maximum storage capacity A5, an upper warehouse minimum storage capacity A6, a lower warehouse maximum storage capacity A7, a lower warehouse minimum storage capacity A8, an upper warehouse revelation water level S1 and a lower warehouse initial water level S3;
the receiving end sends the parameters to an information management system deployed in an information management large area through physical isolation equipment, so that the information management system determines a storage capacity curve table according to the parameters;
the information management system is further configured to:
determining the power generation flow L1 at the rated power of a single machine, the water pumping flow L2 at the rated power of the single machine, the number of hours of power generation T1 and the number of hours of water pumping T2;
determining the electricity generating capacity P1 according to a storage capacity curve table and the electricity generating flow L1 at the rated power of a single machine; and determining the electric quantity P2 capable of pumping water according to a reservoir capacity curve table and the water pumping flow L2 at the rated power of the single machine.
In some embodiments, the determining the amount of power that can be generated P1 according to the library capacity curve and the power generation flow L1 at the rated power of the single machine includes:
in the case of power generation, if the initial storage capacity A1-the minimum storage capacity A6> the maximum storage capacity A7-the initial storage capacity A3,
T1=(A7-A3)/3600/L1×10000
if the starting capacity of the upper library A1-the minimum capacity of the upper library A6< the maximum capacity of the lower library A7-the starting capacity of the lower library A3,
T1=(A1-A6)/3600/L1×10000
wherein, P1 is T1 multiplied by the rated capacity of a single unit/10; wherein the unit of the storage capacity A is ten thousand meters3Flow L1 is given by m3And/s, the rated capacity unit of a single unit is MW, the T1 unit is Hr, and the P1 unit is ten thousand kWh.
In some embodiments, the determining the water pumping electric quantity P2 according to the reservoir capacity curve table and the water pumping flow L2 at the rated power of the single machine comprises:
under the condition of pumping water, if the initial storage capacity A3 of the lower storage, the minimum storage capacity A8 of the lower storage, the maximum storage capacity A5 of the upper storage, the initial storage capacity A1 of the upper storage,
T2=(A5-A1)/3600/L2×10000
if the lower library starting capacity A3-lower library minimum capacity A8< upper library maximum capacity a 5-upper library starting capacity a1,
T2=(A3-A8)/3600/L2×10000
wherein, P2 is T2 multiplied by the rated capacity of a single unit/10; the unit of the storage capacity A is ten thousand m3, the unit of the flow L2 is m3/s, the unit of the rated capacity of a single unit is MW, the unit of T2 is Hr, and the unit of P2 is ten thousand kWh.
In some embodiments, the information management system is further configured to:
and storing the calculation result in a real-time database.
In some embodiments, the information management system is further configured to:
and the power generation and water pumping capacity of each pumped storage power station is shown through a curve or a column diagram or a table.
The technical scheme of the invention has the following beneficial effects: the technical scheme provides a method and a system for processing power generation and water pumping capacity data of a pumped storage power station, real-time data (reservoir water level) are obtained from a computer monitoring system through a front-end acquisition program (a sending end) deployed in a production control area of the pumped storage power station and are forwarded to an information management area through physical isolation equipment, the real-time data are received by the front-end acquisition program (a receiving end) deployed in the information management area and are stored in a real-time database, an intelligent calculation module obtains the real-time data from the real-time database, the reservoir capacity and the power generation/water pumping hours of the reservoir are calculated, calculation results are stored in the real-time database, and a prediction result display module displays prediction results. According to the method and the system in the technical scheme, the reservoir capacities corresponding to the real-time water levels of the upper reservoir and the lower reservoir can be calculated according to the real-time water levels of the upper reservoir and the lower reservoir and by combining a water level reservoir capacity curve of the pumped storage power station and a water level reservoir capacity calculation formula; and then calculating the number of hours of electricity generation, the amount of electricity generation, the number of hours of water pumping and the amount of water pumping, thereby predicting the electricity generation and water pumping capacity of the pumped storage power station.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments for the purpose of illustrating one aspect of the invention.
The embodiment of the invention provides a method for processing power generation and pumping capacity data of a pumped storage power station, which can calculate the storage capacity corresponding to the real-time water levels of an upper reservoir and a lower reservoir according to the real-time water levels of the upper reservoir and the lower reservoir by combining a water level reservoir capacity curve and a water level reservoir capacity calculation formula of the pumped storage power station; and then calculating the number of hours of electricity generation, the amount of electricity generation, the number of hours of water pumping and the amount of water pumping, thereby predicting the electricity generation and water pumping capacity of the pumped storage power station.
The principle of the method for processing the power generation and water pumping capacity data of the pumped storage power station is shown in figure 1, a front-end acquisition program (a sending end) deployed in a production control area of the pumped storage power station acquires real-time data (reservoir water level) from a computer monitoring system, the real-time data are forwarded to an information management area through physical isolation equipment, the front-end acquisition program (a receiving end) deployed in the information management area receives the real-time data and stores the real-time data in a real-time database, an intelligent calculation module acquires the real-time data from the real-time database, the reservoir capacity and the power generation/water pumping hours are calculated, calculation results are stored in the real-time database, and a prediction result display module displays prediction results.
The power generation and water pumping capacity prediction method comprises six parts, namely a front-end acquisition program sending end, a physical isolation device, a front-end acquisition program receiving end, a real-time database, intelligent calculation and prediction result display. The specific implementation is detailed as follows:
1. a front acquisition program sending end: the system is deployed in a production control large area (a safety I area), acquires real-time data including an upper reservoir initial water level and a lower reservoir initial water level from a computer monitoring system, and forwards the data to an information management large area (a safety III area) through physical isolation equipment.
2. Forward physical isolation device: in order to meet the safety protection requirements of pumped storage power stations, safety protection equipment must be additionally installed for data acquisition, and a production control area and a management information area carry out data transmission through forward physical isolation equipment.
3. The preposed acquisition program receiving end: the system is deployed in an information management area, receives real-time data forwarded by a front acquisition program sending end and stores the real-time data in a real-time database.
4. A real-time database: and storing the real-time data and providing the data for the intelligent computing module.
5. Intelligent calculation and a storage capacity curve table: the storage capacity curve table stores the calculation constant value parameters of the pumped storage power station; the intelligent calculation module calculates the number of hours of power generation, the amount of power generation, the number of hours of water pumping and the amount of water pumping according to the real-time water levels of the upper reservoir and the lower reservoir, so that the power generation and water pumping capacity prediction is realized, and the calculation process is as follows:
(1) description of parameter definitions
A1: initial storage capacity of upper warehouse
A3: initial storage capacity of lower warehouse
A5: maximum storage capacity of upper storeroom (highest water level corresponding to storage capacity allowed by pumping water of upper storeroom)
A6: minimum capacity of upper warehouse (lowest level of power generation allowed for the corresponding capacity)
A7: maximum storage capacity of lower warehouse (highest level corresponding to storage capacity of lower warehouse power generation)
A8: minimum storage capacity of lower storehouse (lower storehouse pumping lowest water level corresponding to storage capacity)
S1: initial water level of upper reservoir (from real-time reservoir)
S3: lower reservoir initial level (obtained from real time reservoir)
L1 rated power generation flow of single machine
L2: pumping flow rate of single machine at rated power
T1 hours of electricity generation
T2 Water Pumping hours
P1 power generation capacity
P2 electric quantity capable of pumping water
(2) Set storage curve table (calculation fixed value table)
The method comprises the steps of storing a calculation fixed value table of the pumped storage power station in a configuration file mode, and storing maximum upper storage capacity (A5), minimum upper storage capacity (A6), maximum lower storage capacity (A7), minimum lower storage capacity (A8), power generation flow (L1) during rated power of a single machine, pumped flow (L2) during rated power of the single machine and rated capacity of the single machine. And supporting the configuration of a plurality of pumped storage power stations.
(3) Calculate the upper and lower library capacity
And calculating the initial water level S1 of the upper reservoir, the initial reservoir capacity A1 of the upper reservoir and the initial reservoir capacity A3 of the lower reservoir corresponding to the initial water level S3 of the lower reservoir according to a water level reservoir capacity curve table of the pumped storage power station and a water level reservoir capacity calculation formula. Reading and calculating a fixed value from a library capacity curve table, wherein the maximum library capacity A5 of an upper library, the minimum library capacity A6 of the upper library, the maximum library capacity A7 of a lower library, the minimum library capacity A8 of the lower library, the generating flow L1 at rated power of a single machine, the pumping flow L2 at rated power of the single machine and the rated capacity of a unit.
(4) Calculating the number of hours T1 and the amount P1 of electricity generated
The principle is as follows: in the case of power generation, if the initial storage capacity A1-the minimum storage capacity A6 of the upper storage > the maximum storage capacity A7-the initial storage capacity A3 of the lower storage, it indicates that at most, only as much water as the maximum storage capacity A7-the initial storage capacity A3 of the lower storage can be used for power generation, the lower storage can only receive the maximum storage capacity A7-the initial storage capacity A3 of the lower storage for power generation, otherwise, the maximum water level of the lower storage is exceeded; if the initial storage capacity A1 of the upper storage, the minimum storage capacity A6 of the upper storage, and the maximum storage capacity A7 of the lower storage, the initial storage capacity A3 of the lower storage indicate that the maximum amount of water of the initial storage capacity A1 of the upper storage, the minimum storage capacity A6 of the upper storage can be used for generating electricity, and the lower storage can completely receive the amount of water of the initial storage capacity A1 of the upper storage, the minimum storage capacity A6 of the upper storage for generating electricity and can not reach the maximum storage capacity A7 of the lower storage. Thus, the number of electricity generation possible hours T1 can be calculated; the amount of electricity generated P1 can be calculated from the number of hours of electricity generated T1 and the rated capacity of the single machine.
If A1-A6>A7-A3
T1=(A7-A3)/3600/L1×10000
Else if
T1=(A1-A6)/3600/L1×10000
Rated capacity/10 of single unit T1X P1 ═ T1 ×
Note: the unit of the storage capacity A is ten thousand meters3Flow L1 is given by m3And/s, the rated capacity unit of a single unit is MW, the T1 unit is Hr, and the P1 unit is ten thousand kWh.
(5) Calculating the time T2 for pumping water and the electric quantity P2 for pumping water
The principle is as follows: under the condition of water pumping, if the initial storage capacity A3-the minimum storage capacity A8 of the lower storage, the maximum storage capacity A5-the initial storage capacity A1 of the upper storage, the maximum water quantity of the maximum storage capacity A5-the initial storage capacity A1 of the upper storage can be used for water pumping, the upper storage can only receive the maximum storage capacity A5-the water quantity of the initial storage capacity A1 of the upper storage for water pumping, otherwise, the maximum storage capacity A5 of the upper storage is exceeded; if the initial storage capacity A3 of the lower storage, the minimum storage capacity A8 of the lower storage and the maximum storage capacity A5 of the upper storage are less than the initial storage capacity A1 of the upper storage, the situation that the maximum water quantity of the initial storage capacity A3 of the lower storage and the minimum storage capacity A8 of the lower storage is used for pumping water is indicated, the upper storage can completely receive the water quantity of the initial storage capacity A3 of the lower storage and the minimum storage capacity A8 of the lower storage for pumping water and cannot reach the maximum storage capacity A5 of the upper storage, and therefore the time T2 of pumping water can be calculated; the electric quantity P2 for pumping water can be calculated according to the pumping hours T2 and the rated capacity of the single machine.
If A3-A8>A5-A1
T2=(A5-A1)/3600/L2×10000
Else if
T2=(A3-A8)/3600/L2×10000
Rated capacity/10 of single unit T2X P2 ═ T2 ×
Note: the unit of the storage capacity A is ten thousand m3, the unit of the flow L2 is m3/s, the unit of the rated capacity of a single unit is MW, the unit of T2 is Hr, the unit of P2 is ten thousand kWh
(6) Storing the calculation result in a real-time database: the calculation result can be configured as required, and the calculation of the second-order frequency is supported.
6. And (4) displaying a prediction result: and the power generation and water pumping capacity of each pumped storage power station is displayed in the modes of curves, column diagrams, tables and the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.