CN110233477B - Stability control simulation system based on three-defense line simulation - Google Patents
Stability control simulation system based on three-defense line simulation 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
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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
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Abstract
The invention provides a stability control simulation system based on simulation of three defensive lines, which comprises a first simulation module, a second simulation module and a third simulation module, wherein the first simulation module, the second simulation module and the third simulation module are used for respectively carrying out simulation on a relay protection device of the first defensive line, a stability control device of the second defensive line and a low-frequency low-voltage load shedding device of the third defensive line, and simultaneously simulate primary equipment through a primary equipment simulation module, meanwhile, a mapping module is set to establish the mapping relation between the primary equipment and the secondary equipment, the first simulation module, the second simulation module and the third simulation module acquire and process the information simulated by the primary equipment simulation module, therefore, the running state of the three-defense line in the actual power system is simulated, the simulation result is compared with the pre-stored dynamic model experiment data, the effectiveness and the accuracy of the three-defense line model are verified, and the stable and reliable running of the power system is guaranteed.
Description
Technical Field
The invention relates to the technical field of safety and stability of power systems, in particular to a stability control simulation system based on three-defense line simulation.
Background
With the continuous increase of electricity consumption in China, three defense lines for ensuring the safe operation of a power grid are provided for the safety and stability of a power system: the first defense line is a relay protection device and is used for quickly cutting off a fault element to prevent the fault from being enlarged; a second defense line, a safety and stability control device, which adopts stability control measures to prevent the system from losing stability; the third line of defense, the low-frequency low-voltage load shedding device, prevent the large area from cutting off the power after the system loses the stability, the reliable operation of the three lines of defense is the foundation to guarantee the normal power consumption, but the simulation modeling application to the three lines of defense at home at present is less, and not deep enough, in the power system transient stability simulation program commonly used at home and abroad, there is basically no simulation tool to provide models such as relay protection, stability control, etc., the functions such as protection, generator tripping load cutting, etc. are realized only by the on-off of the breaker after the predetermined time, the stable and reliable operation of the electric network can not be guaranteed comprehensively.
Disclosure of Invention
Therefore, the invention provides a stability control simulation system based on three-defense line simulation, which is used for establishing a detailed model of the three-defense line, simulating the running state of the three-defense line in the actual situation through information processing in the model, and comparing the running state with the pre-stored dynamic model data, so that the validity and the accuracy of the three-defense line model are verified, and the stable and reliable running of a power grid is ensured.
The technical scheme of the invention is realized as follows:
stability control simulation system based on emulation of three defence lines, including the primary equipment emulation module that is used for simulating primary equipment, be used for simulating relay protection device's first emulation module, be used for simulating the second emulation module of stably controlling the device, be used for simulating the third emulation module of low frequency low pressure deloading device, be used for saving the storage module of movable mould experimental data and be used for carrying out the contrast module of contrast, the information of primary equipment emulation module is gathered and is imitated to first emulation module, second emulation module and third emulation, first emulation module, second emulation module and third emulation transmit the simulation result for the contrast module, the contrast module reads movable mould experimental data and the simulation result in the storage module and compares.
Preferably, the simulation system further comprises a first mapping module, a second mapping module and a third mapping module, the first simulation module establishes a mapping relationship with the primary equipment simulation module through the first mapping module, the second simulation module establishes a mapping relationship with the primary equipment simulation module through the second mapping module, and the third simulation module establishes a mapping relationship with the primary equipment simulation module through the third mapping module.
Preferably, the first simulation module comprises a data sampling module, a relay protection logic operation module and a relay protection logic judgment module, the data sampling module collects current and voltage values output by the primary equipment simulation module and transmits the current and voltage values to the relay protection logic operation module, the relay protection logic operation module performs logic operation according to the current and voltage values and then transmits action outlet information to the relay protection logic judgment module, the relay protection logic judgment module obtains behavior information for executing secondary equipment action according to the action outlet information, and the relay protection logic judgment module transmits the behavior information to the comparison module.
Preferably, the simulation system further comprises a fixed value input module, and the fixed value input module outputs fixed value data to the first simulation module and the second simulation module respectively.
Preferably, the simulation system further comprises a switching value input module, and the switching value input module outputs switching values to the first simulation module and the second simulation module respectively.
Preferably, the second simulation module comprises a sampling communication module, a stability control logic judgment module and an execution module, the sampling communication module samples the tidal current data simulated by the primary equipment simulation module, the sampling communication module processes the tidal current data to obtain a secondary voltage and current value and switch position information and transmits the secondary voltage and current value and switch position information to the stability control logic judgment module, the stability control logic judgment module performs logic judgment according to the received information to obtain strategy action information and transmits the strategy action information to the execution module, and the execution module executes load shedding or load shedding according to the strategy action information.
Preferably, the third simulation module includes a bus voltage acquisition module, a feature extraction module, a load shedding logic judgment module and a load shedding module, the bus voltage acquisition module acquires primary values of two bus voltages simulated by the primary device simulation module, the feature extraction module receives the primary values of the bus voltages transmitted by the bus voltage acquisition module to extract fault feature quantities, the load shedding logic judgment module judges low frequency and low voltage according to the fault feature quantities to obtain load shedding information, and the load shedding module executes a load shedding command according to the load shedding information.
Preferably, the simulation system further comprises a display module for displaying the simulation result, and the comparison module transmits the simulation result to the display module.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a stability control simulation system based on simulation of three defense lines, which respectively carries out simulation on a relay protection device of a first defense line, a stability control device of a second defense line and a low-frequency low-voltage load shedding device of the third defense line, simultaneously simulates primary equipment, obtains and processes information of the simulated primary equipment by the three defense lines, so as to simulate the running state of the three defense lines in an actual electric power system, compares the running state with pre-stored dynamic simulation experiment data, verifies the effectiveness and the accuracy of a model of the three defense lines, and provides guarantee for the stable and reliable running of the electric power system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an embodiment of a stability control simulation system based on three-defense line simulation according to the present invention;
FIG. 2 is a schematic diagram of a first simulation module of an embodiment of a stability control simulation system based on three-defense line simulation according to the present invention;
FIG. 3 is a schematic diagram of a second simulation module of an embodiment of a stability control simulation system based on three-defense line simulation according to the present invention;
FIG. 4 is a schematic diagram of a third simulation module of an embodiment of a stability control simulation system based on three-defense line simulation according to the present invention;
in the figure, 1 is a primary device simulation module, 2 is a first simulation module, 3 is a second simulation module, 4 is a third simulation module, 5 is a storage module, 6 is a comparison module, 7 is a first mapping module, 8 is a second mapping module, 9 is a third mapping module, 10 is a data sampling module, 11 is a relay protection logic operation module, 12 is a relay protection logic judgment module, 13 is a fixed value input module, 14 is a switching value input module, 15 is a sampling communication module, 16 is a stability control logic judgment module, 17 is an execution module, 18 is a bus voltage acquisition module, 19 is a feature extraction module, 20 is an unloading logic judgment module, 21 is an off-load module, and 22 is a display module.
Detailed Description
For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1, the stability control simulation system based on three-defense line simulation provided by the invention comprises a primary equipment simulation module 1 for simulating primary equipment, a first simulation module 2 for simulating a relay protection device, a second simulation module 3 for simulating a stability control device, a third simulation module 4 for simulating a low-frequency low-voltage load shedding device, a storage module 5 for storing dynamic simulation experiment data and a comparison module 6 for comparing, wherein the first simulation module 2, the second simulation module 3 and the third simulation module collect information of the primary equipment simulation module 1 and simulate the information, the first simulation module 2, the second simulation module 3 and the third simulation module transmit simulation results to the comparison module 6, and the comparison module 6 reads the dynamic simulation experiment data in the storage module 5 and compares the simulation results.
The invention simulates three defense lines in an electric power system, namely a relay protection device used as a first defense line, a stable control device used as a second defense line and a low-voltage low-frequency load shedding device used as a third defense line, and simultaneously simulates primary equipment through a primary equipment simulation module 1, then establishing a relation between the three defensive lines and the primary equipment simulation module 1, wherein the first simulation module 2, the second simulation module 3 and the third simulation module 4 can collect the information of the primary equipment simulated in the primary equipment simulation module 1, then, logic operation, logic judgment and the like are carried out according to the acquired information, so as to simulate the actual operation state of the secondary equipment in the power system, the simulation result is sent to a comparison module 6 for comparison, therefore, the effectiveness and the accuracy of the three-defense line model are verified, and the guarantee is provided for the stable and reliable operation of the power system.
Specifically, in order to verify the effectiveness of the three-defense line model, the invention is provided with the storage module 5, the storage module 5 is used for storing typical dynamic simulation experiment data, and the effectiveness and the accuracy of the three-defense line model are verified by comparing the typical dynamic simulation experiment data with the simulation result of the three-defense line.
The simulation of the invention is to establish a detailed model of relay protection, stability control and load shedding on the basis of an electromechanical-electromagnetic transient hybrid simulation model, wherein the model internally comprises modules of logic operation, logic judgment and the like, corresponding logic operation, logic judgment and execution operation are carried out according to the acquired primary equipment information, and the obtained result is compared with typical dynamic simulation experiment data so as to verify the effectiveness and accuracy of the three-defense line model.
Preferably, the simulation system further comprises a first mapping module 7, a second mapping module 8 and a third mapping module 9, the first simulation module 2 establishes a mapping relationship with the primary equipment simulation module 1 through the first mapping module 7, the second simulation module 3 establishes a mapping relationship with the primary equipment simulation module 1 through the second mapping module 8, and the third simulation module 4 establishes a mapping relationship with the primary equipment simulation module 1 through the third mapping module 9.
After a simulation model of three defense lines is established, mapping relations between the three defense lines and the primary equipment simulation module 1 need to be established respectively, so that the three defense lines can acquire related information of corresponding primary equipment simulated by the primary equipment simulation module 1 respectively, a specific mapping method is that on an electromechanical-electromagnetic transient simulation platform, a primary equipment model is established according to an operation mode naming rule, primary equipment and secondary equipment are used for corresponding equipment names, wherein primary equipment is named according to a mode to establish primary topology, the secondary equipment is associated with the primary equipment according to the mode naming rule, and after association is completed, the first simulation module 2, the second simulation module 3 and the third simulation module 4 can acquire corresponding information in the primary equipment simulation module 1.
In this embodiment, by setting the corresponding real-time database, the primary and secondary devices of the power grid implement data exchange and mutual instruction control through the real-time database.
Referring to fig. 1 and 2, the first simulation module 2 includes a data sampling module 12, a relay protection logic operation module 13, and a relay protection logic judgment module 14, the data sampling module 12 collects a current value and a voltage value output by the primary device simulation module 1 and transmits the current value and the voltage value to the relay protection logic operation module 13, the relay protection logic operation module 13 performs logic operation according to the current value and the voltage value and then transmits action outlet information to the relay protection logic judgment module 14, the relay protection logic judgment module 14 obtains behavior information for executing a secondary device action according to the action outlet information, and the relay protection logic judgment module 14 transmits the behavior information to the comparison module 6.
In this embodiment, the first simulation module 2 is used for simulating a relay protection device, the simulation is based on an electromechanical-electromagnetic transient simulation platform, a digital model of various relay protection devices in a power grid is established by using a graphical simulation support platform system, the first simulation module 2 includes a data sampling module 12, a relay protection logic operation module 13 and a relay protection logic judgment module 14, after a mapping relation between the first simulation module 2 and the primary device simulation module 1 is established, a current value and a voltage value corresponding to primary device simulation output are collected by the data sampling module 12, the current value and the voltage value collected by the data sampling module 12 are used as input of the relay protection logic operation module 13, the relay protection logic operation module 13 performs logic operation on the current value and the voltage value, in the logic operation process, the relay protection logic operation module 13 needs to obtain corresponding constant value information and switching value information, the fixed value information and the switching value information are stored in advance, when the relay protection logic operation module 13 works, the corresponding switching value information and the fixed value information are input into the relay protection logic operation module 13, the relay protection logic operation module 13 carries out logic comparison on each switching value according to the received fixed value information, the collected current and voltage values are compared with the fixed value information, action outlet information is output, finally, the relay protection logic judgment module 14 judges the action outlet information to obtain behavior information for executing secondary equipment action, the obtained behavior information is transmitted to the comparison module 6, and the comparison module 6 compares the behavior information to verify the effectiveness and the stability of a first defense line.
Preferably, the simulation system further comprises a fixed value input module 13, and the fixed value input module 13 outputs fixed value data to the first simulation module 2 and the second simulation module 3 respectively.
The first simulation module 2 and the second simulation module 3 need to receive corresponding fixed value information in the process of analog simulation, and the invention is provided with a fixed value input module 13 which is used for storing corresponding fixed value information, and outputting the corresponding fixed value information to the first simulation module 2 or the second simulation module 3 for processing when the first simulation module 2 and the second simulation module 3 carry out analog simulation.
Because the relay protection model is modeled by adopting a relay protection principle, but not a device, and the setting value of the relay protection model depends on the adopted relay protection principle, the second simulation module 3 only needs to adopt the required setting value information and the principle common quantity setting value when performing logic operation, and the setting value input module 13 is in data connection with the relay protection logic operation module 13.
The fixed value information required by the second simulation module 3 comprises fixed value data, instructions of the main station and the sub-station, anti-error criteria and the like, and the corresponding fixed value information is also transmitted to the second simulation module 3 through the fixed value input module 13.
Preferably, the simulation system further comprises a switching value input module 14, wherein the switching value input module 14 outputs switching values to the first simulation module 2 and the second simulation module 3 respectively.
Similarly, the first simulation module 2 and the second simulation module 3 need to receive corresponding switching value information in the process of performing analog simulation, the switching value information is sent to the first simulation module 2 and the second simulation module 3 through the set switching value input module 14, the first simulation module 2 and the second simulation module 3 can perform corresponding logic operation according to the switching value information to obtain a simulation result, and the switching value input module 14 is in data connection with the relay protection logic operation module 13.
Referring to fig. 1 and 3, the second simulation module 3 includes a sampling communication module 15, a stability control logic judgment module 16 and an execution module 17, the sampling communication module 15 samples power flow data simulated by the primary device simulation module 1, the sampling communication module 15 processes the power flow data to obtain a secondary voltage and current value and switch position information, and transmits the secondary voltage and current value and the switch position information to the stability control logic judgment module 16, the stability control logic judgment module 16 performs logic judgment according to the received information to obtain policy action information and transmits the policy action information to the execution module 17, and the execution module 17 executes load shedding or load shedding actions according to the policy action information.
The second simulation module 3 is used for simulating a stability control device, the simulation modeling of the stability control device is basically consistent with the simulation modeling of the relay protection device, similarly, after the mapping relationship between the second simulation module 3 and the primary equipment simulation module 1 is established, the load flow data simulated by the primary equipment simulation module 1 is adopted by the sampling communication module 15 and converted into a voltage and current secondary value and the position information of a switch according to the mapping relationship, the stability control logic judgment module 16 receives the information of the electrical quantity, the switch position and the like provided by the sampling communication module 15 and simultaneously receives the fixed value information and the switch value information transmitted by the fixed value input module 13 and the switch value input module 14, the stability control logic judgment module 16 performs logic judgment by combining the fixed value information and transmits the strategy action information to the execution module 17, the execution module 17 receives the strategy action information and executes the strategy action instruction, the method comprises the steps of executing load cutting and machine cutting actions, sending an execution result to a comparison module 6, and comparing typical dynamic model experiment data by the comparison module 6, so that the validity and reliability of a second defense line are verified.
Referring to fig. 1 and 4, the third simulation module 4 includes a bus voltage acquisition module 18, a feature extraction module 19, a load shedding logic judgment module 20, and a load shedding module 21, where the bus voltage acquisition module 18 acquires primary values of two bus voltages simulated by the primary device simulation module 1, the feature extraction module 19 receives the primary values of the bus voltages transmitted by the bus voltage acquisition module 18 to extract fault feature quantities, the load shedding logic judgment module 20 performs low-frequency and low-voltage judgment according to the fault feature quantities to obtain load shedding information, and the load shedding module 21 executes a load shedding command according to the load shedding information.
The invention is used as a low-frequency low-voltage load-shedding device of a third defense line of an electric power system, the invention carries out analog simulation by a third simulation module 4, collects primary values of two bus voltages simulated by a primary equipment simulation module 1 by a bus voltage collection module 18, carries out characteristic quantity extraction on the primary values of the voltages by a characteristic extraction module 19, wherein the characteristic quantity comprises frequency, frequency change rate, phase voltage change rate and the like, then carries out low-frequency and low-voltage judgment by a load shedding logic judgment module 20 according to logic to obtain load shedding information, finally carries out load shedding commands by a load shedding module 21, sequentially cuts off unimportant loads by the third simulation module 4 according to the system frequency and voltage reduction degree so as to limit the frequency and the voltage to continuously reduce, transmits the cut-off load information to a comparison module 6, compares typical dynamic model experiment data by the comparison module 6, thereby verifying the effectiveness and reliability of the third line of defense.
Preferably, the simulation system further comprises a display module 22 for displaying the simulation result, and the comparison module 6 transmits the simulation result to the display module 22.
The display module 22 is used for displaying a simulation result, the display module 22 is connected with the comparison module 6, the comparison module 6 transmits the result to the display module 22 after comparison, and the display module 22 displays the simulation result, for example, the accuracy of three defense lines is displayed, so that an experimenter can know the effectiveness and reliability of the three defense lines through the display module 22.
The invention relies on an electromechanical-electromagnetic transient hybrid simulation platform to establish a detailed protection model, the model comprises internal logic and action characteristics, the input/output quantity and fixed value setting of the model are consistent with those of an actual device, the model has a self-defining function, the simulation of different types of devices is met, and the validity and the accuracy of the Hainan power grid protection action model are verified by comparing with typical dynamic simulation experimental data.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The stability control simulation system based on three-defense line simulation is characterized by comprising a primary equipment simulation module for simulating primary equipment, a first simulation module for simulating a relay protection device, a second simulation module for simulating a stability control device, a third simulation module for simulating a low-frequency low-voltage load shedding device, a storage module for storing dynamic simulation experiment data and a comparison module for comparing, wherein the first simulation module, the second simulation module and the third simulation module acquire information of the primary equipment simulation module and simulate the information, the first simulation module, the second simulation module and the third simulation module transmit simulation results to the comparison module, and the comparison module reads the dynamic simulation experiment data in the storage module and compares the simulation results; the second simulation module comprises a sampling communication module, a stability control logic judgment module and an execution module, wherein the sampling communication module samples tidal current data simulated by the primary equipment simulation module, the sampling communication module processes the tidal current data to obtain a secondary voltage and current value and switch position information and transmits the secondary voltage and current value and the switch position information to the stability control logic judgment module, the stability control logic judgment module performs logic judgment according to the received information to obtain strategy action information and transmits the strategy action information to the execution module, and the execution module executes load shedding or load shedding actions according to the strategy action information.
2. The stability control simulation system based on three-defense-line simulation of claim 1, further comprising a first mapping module, a second mapping module and a third mapping module, wherein the first simulation module establishes a mapping relationship with the primary equipment simulation module through the first mapping module, the second simulation module establishes a mapping relationship with the primary equipment simulation module through the second mapping module, and the third simulation module establishes a mapping relationship with the primary equipment simulation module through the third mapping module.
3. The stability control simulation system based on three-defense line simulation of claim 1, wherein the first simulation module comprises a data sampling module, a relay protection logic operation module and a relay protection logic judgment module, the data sampling module collects current and voltage values output by the primary equipment simulation module and transmits the current and voltage values to the relay protection logic operation module, the relay protection logic operation module performs logic operation according to the current and voltage values and then transmits action outlet information to the relay protection logic judgment module, the relay protection logic judgment module obtains behavior information for executing secondary equipment action according to the action outlet information, and the relay protection logic judgment module transmits the behavior information to the comparison module.
4. The stability control simulation system based on three-wire defense simulation of claim 1, further comprising a constant value input module, wherein the constant value input module outputs constant value data to the first simulation module and the second simulation module, respectively.
5. The stability control simulation system based on three-wire defense simulation of claim 1, further comprising a switching value input module, wherein the switching value input module outputs switching values to the first simulation module and the second simulation module respectively.
6. The stability control simulation system based on three-wire defense simulation of claim 1, wherein the third simulation module comprises a bus voltage acquisition module, a feature extraction module, a load shedding logic judgment module and a load shedding module, the bus voltage acquisition module acquires primary values of two bus voltages simulated by the primary equipment simulation module, the feature extraction module receives the primary values of the bus voltages transmitted by the bus voltage acquisition module to extract fault feature quantities, the load shedding logic judgment module performs low-frequency and low-voltage judgment according to the fault feature quantities to obtain load shedding information, and the load shedding module executes a load shedding command according to the load shedding information.
7. The stability control simulation system based on three-defense-line simulation of claim 1, further comprising a display module for displaying the simulation result, wherein the comparison module transmits the simulation result to the display module.
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| CN111723481B (en) * | 2020-06-17 | 2023-04-11 | 国网重庆市电力公司电力科学研究院 | Relay protection equipment simulation verification method and device and readable storage medium |
| CN111679655B (en) * | 2020-06-18 | 2023-09-15 | 海南电网有限责任公司 | Fixed value checking device of safety and stability control system |
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| CN110233477A (en) | 2019-09-13 |
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