CN110752674B - Electric power disaster monitoring and simulating system - Google Patents
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Abstract
The invention discloses a power disaster monitoring and simulating system, which comprises: disaster monitoring device, electric wire netting controlling means, electric wire netting analytical equipment and dispatch analogue means. The simulation scheduling device with the large power grid multi-stage scheduling and combined anti-accident exercise function can be used for collecting, monitoring and carrying out corresponding scheduling simulation on various disasters and faults, greatly improves the capacity of various levels of power grid scheduling operators for managing power grid operation and processing large power grid accidents in a coordinated manner, and well meets the requirements for real-time disaster monitoring and training simulation of an ultra-high voltage alternating current-direct current interconnected large power grid.
Description
Technical Field
The invention relates to the field of disaster monitoring, in particular to an electric power disaster monitoring and simulating system.
Background
The electric power system is related to a plurality of systems of water supply, gas supply, traffic and communication, and is one of the most important components in a large-scale complex lifeline system. Accidents and losses in power systems due to natural disasters and failures are very disastrous. In recent years, failures of power systems caused by natural disasters have increased year by year. Natural disasters that can damage power systems include wind, earthquake, snow, extreme temperatures, and the like.
The research on disaster prevention of the power system is developed, and the improvement of the safety of the power system under natural disasters is an irreparable task and challenge. Particularly, on the basis of meeting the control and analysis functions, how to realize the electric power disaster monitoring and simulation demonstration is urgent.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides an electric power disaster monitoring and simulating system, which is characterized by comprising: the system comprises a disaster monitoring device, a power grid control device, a power grid analysis device and a scheduling simulation device; wherein.
The disaster monitoring device is used for monitoring disasters.
(1) Flood data collection, water affair calculation, hub operation and river basin monitoring. The flood data acquisition comprises telemetering data acquisition, flood reporting data acquisition and processing and data communication; the water affair calculation comprises real-time data processing, conventional data processing and water affair calculation processing; the operation of the junction is to carry out comprehensive monitoring on the hydro-junction; the watershed monitoring is to monitor the watershed or sub-watershed intervals based on a bitmap and a Geographic Information System (GIS).
(2) Receiving and storing lightning data, generating a lightning trend graph, generating a lightning activity alarm of the power grid equipment, inquiring the position of the line lightning fault, judging whether the line tripping property is caused by lightning, and generating a power grid lightning activity report and a lightning activity intensity distribution graph through statistical analysis.
(3) The unit monitoring comprises real-time monitoring of flue gas desulfurization of the coal-fired unit, on-line monitoring of coal consumption of the thermal power unit and on-line monitoring of thermal load of the thermoelectric unit. And performing on-line acquisition, transmission, processing, calculation and analysis on the thermal power and electric power data of a thermal power plant desulfurization system, a thermal generator set for supplying power and coal consumption and a heat supply unit.
(4) Monitoring wind power and photovoltaic power generation related data, wherein the wind power data monitoring is implemented by acquiring meteorological elements in a wind electric field area range in real time, so that the wind power change condition of a wind power plant is monitored, and a data source is provided for output prediction of a wind turbine generator; the photovoltaic power generation data monitoring receives external meteorological data and analyzes the external meteorological data into solar panel voltage and battery voltage data, and a data source is provided for photovoltaic generator set output prediction.
(5) The method comprises the steps of meteorological monitoring and meteorological information access, wherein the meteorological monitoring is that various automatic meteorological observation, image monitoring and lightning monitoring facilities are arranged around an important transformer substation and a power transmission network frame, a meteorological information acquisition, transmission and storage center is established, and real-time monitoring is carried out based on geographic information and remote sensing images; the weather information access is to acquire forecast and real-time weather information from weather stations.
(6) And monitoring and managing the system operation condition in real time, wherein the monitoring objects comprise power grid operation data, a communication channel, a system network, the application subsystem operation condition and automatic system machine room operation environment monitoring, processing the data, and reporting the operation condition of the application subsystem to a worker in a short message mode.
The power grid control device comprises a power generation control module and a voltage control module.
The power generation control module enables power generation to automatically track load change by controlling active power of the generator set in the dispatching area, maintains system frequency as a rated value, maintains power exchange of a power grid connecting line, monitors reserve capacity, and achieves load frequency control, reserve capacity calculation, control area and unit performance assessment.
The power generation control module receives and processes real-time telemetering and remote signaling data, including system frequency, tie line exchange power, time difference, regional control deviation issued by upper-level scheduling, unit active power, unit regulation upper and lower limits, unit controlled state and unit ascending/descending power locking signals.
The running state of the power generation control module comprises an online state, an offline state and a pause state.
The control mode of the power generation control module comprises.
And (4) performing constant frequency control, namely maintaining the system frequency to be constant, wherein only frequency components are contained in the area control deviation calculation formula.
And determining the junctor exchange power control, and keeping the junctor exchange power constant, wherein at the moment, only the junctor exchange power component is contained in the regional control deviation calculation formula.
And controlling the system frequency and the tie line exchange power simultaneously by using the tie line and the frequency deviation, wherein the area control deviation calculation formula simultaneously comprises a frequency component and a tie line exchange power component.
The power generation control module corrects a clock error generated by system frequency deviation and unintentional exchange electric quantity generated when net exchange power deviates from a planned value in a control process, and the time difference correction and the electric quantity compensation support two starting modes, namely manual or automatic.
The voltage control module is used for monitoring and automatically controlling the bus voltage of the power grid, the reactive power of the generator and the reactive power flow of the power grid; and analyzing and calculating by using real-time data of the power grid and a real-time mode provided by state estimation, carrying out online closed-loop control on the reactive power adjustable equipment, and carrying out reactive power optimization.
On the premise of meeting the operation and safety constraints of the power grid, the reactive power optimization takes the minimization of the network loss of the whole power grid as an optimization target, provides the optimized set values of the central bus voltage and the reactive power of the key connecting lines of each partition, and supports operation monitoring, control decision, coordination control, control execution and locking.
The voltage control module performs online optimized closed-loop control on reactive voltage equipment such as generator reactive power, on-load tap changer taps, switchable reactive compensation devices, static reactive compensation devices and the like based on the acquired real-time operation data of the power grid, and realizes a reactive voltage grading control mode.
The power grid analysis device is used for.
(1) And carrying out topology analysis on the network, determining a network wiring model, establishing a network bus model and an electric island model, and providing the network bus model and the electric island model for other applications and modules.
(2) According to network wiring information, network parameters, redundant analog measurement values and switching value states, estimation values of bus voltage amplitude values and phase angles are obtained, suspicious data are detected, bad data are identified, accuracy of real-time measurement is checked, load flows of all branches are calculated, and power grid load flow solutions are provided for an observable part and an unobservable part of a power system. And the state estimation generates complete real-time network state data and provides real-time operation mode data for other applications and modules.
(3) Analyzing the running state of the power grid in a real-time mode and various hypothetical modes, and calculating the state quantity of each bus and the active and reactive power of each branch of the network according to the given injection power and the bus voltage on the basis of a network topology model.
(4) Calculating the sensitivity of the active power of the set to the active power flow of the line, the active power of the set to the section flow, the reactive power of the set to the bus voltage and reactive compensation equipment switching to the bus voltage and the sensitivity of a transformer tap to the bus voltage by using the operation data and mode data of the power grid; and calculating the sensitivity and penalty factors of the network active loss to the unit active power, the regional exchange power, the tie line power and the like.
(5) The method comprises the steps of evaluating the influence on the safe operation of the power system when an element or an element combination in the power system fails, calculating the operation state of the system when the element exceeds the limit after the failure occurs, evaluating the safety level of the whole power grid, warning the failure threatening the safe operation of the power grid, and evaluating the influence of the failure on the safe operation of the system.
(6) And calculating the active power flow and the transmission capacity of a system connecting line, a large power plant outgoing line section, an important line or section under real-time and future ground states or N-1 conditions.
(7) And calculating the current of each branch circuit and the voltage of each bus after the fault according to the specified fault condition, and checking the breaking capacity of the switch.
(8) The method comprises the steps of combining network equivalence between upper-level scheduling and lower-level scheduling, wherein the upper-level scheduling realizes online static equivalence of external networks of all lower-level scheduling, and the lower-level scheduling supports the access and processing of external network equivalence models.
(9) And dynamically evaluating the operation of the power grid, and performing statistical analysis on the safe and economic operation level, plan execution and operation condition of a technical support system of the power grid by using the output result of real-time monitoring and early warning application so as to provide support for scheduling operation and analysis.
The dispatching simulation device comprises a power system simulation module, a teaching simulation module and a control simulation module; wherein.
The power system simulation module establishes a steady-state and dynamic model for the primary equipment of the power system to realize the simulation of the steady-state, the transient state and the medium-and-long-term dynamic state of the power system, and simultaneously models the secondary equipment of the power system, including a relay protection and a safety automatic device) and a data acquisition system.
The electric power system simulation module obtains a real-time mode from the network analysis of a real-time state, or obtains a stored historical research mode through a basic platform to be used as an initial section of a training teaching plan; acquiring a power grid network model from unified model management provided by a platform, and supporting training based on an online model and a future model; and meanwhile, a power grid secondary equipment model is obtained from secondary equipment model management provided by the platform, and the data are subjected to initialized integration and processing to generate a training simulation operation initial environment.
The power system simulation comprises data acquisition simulation. The simulated remote measurement and remote signaling can be transmitted to a power grid real-time monitoring and intelligent alarm module in a simulated state, so that network analysis, real-time scheduling planning and power grid automatic control in the simulated state are supported; and the simulation remote control, remote regulation and automatic power grid control instructions can be received, and the effect and influence of various external control devices on the simulation state of the power system can be displayed.
The teaching simulation module is used for teaching plan making, training control and training evaluation in training. The method can be used for compiling teaching plan, including adjustment making and management of the training initial section and making and management of a training event sequence, supporting control operations of starting, pausing, continuing, returning, replaying and ending of a training process, recording information of the training process, forming corresponding report data and evaluating a training task.
The control simulation module is used for establishing an application environment in the trainee training process and realizing the simulation of the control center. In this environment, the trainee can apply various analysis tools to monitor and control the power grid in a simulation state. The method comprises the following steps: the remote measurement and remote signaling of data acquisition simulation are used as input, remote control, remote regulation operation and control instructions are sent to the power system model, and real-time plan regulation means and effects are simulated.
The invention can collect and monitor various disasters and faults and carry out corresponding scheduling simulation, has the simulation scheduling device with the function of large power grid multi-stage scheduling combined anti-accident exercise, greatly improves the capability of scheduling and operating personnel of all stages of power grids to cooperatively manage power grid operation and process large power grid accidents, and well meets the requirements of real-time disaster monitoring and training simulation of the extra-high voltage alternating current-direct current interconnected large power grid.
Drawings
Fig. 1 is a block diagram of an electric power disaster monitoring and simulating system according to the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a power disaster monitoring and simulation system, including: the system comprises a disaster monitoring device, a power grid control device, a power grid analysis device and a scheduling simulation device; wherein.
The disaster monitoring device is used for monitoring disasters.
(1) Flood data collection, water affair calculation, hub operation and river basin monitoring. The flood data acquisition comprises telemetering data acquisition, flood reporting data acquisition and processing and data communication; the water affair calculation comprises real-time data processing, conventional data processing and water affair calculation processing; the hub operation is to comprehensively monitor the hydro-junction; the river basin monitoring is based on bitmap and geographic information system GIS to monitor river basin or sub river basin interval.
(2) Receiving and storing lightning data, generating a lightning trend graph, generating a lightning activity alarm of the power grid equipment, inquiring the position of a line lightning fault, judging whether the line tripping property is caused by lightning, and generating a power grid lightning activity report and a lightning activity intensity distribution graph through statistical analysis.
(3) The unit monitoring comprises real-time monitoring of flue gas desulfurization of the coal-fired unit, on-line monitoring of coal consumption of the thermal power unit and on-line monitoring of thermal load of the thermoelectric unit. And performing online acquisition, transmission, processing, calculation and analysis on the thermal power and electric power data of a thermal power plant desulfurization system, a thermal power generating unit for supplying power and coal consumption, and a heat supply unit.
(4) Monitoring wind power and photovoltaic power generation related data, wherein wind power data monitoring is realized by acquiring meteorological elements in a wind electric field area range in real time, so that the wind power change condition of a wind power plant is monitored, and a data source is provided for output prediction of a wind turbine generator; the photovoltaic power generation data monitoring receives external meteorological data and analyzes the external meteorological data into solar panel voltage and battery voltage data, and a data source is provided for photovoltaic generator set output prediction.
(5) The method comprises the steps of meteorological monitoring and meteorological information access, wherein the meteorological monitoring is that various automatic meteorological observation, image monitoring and lightning monitoring facilities are arranged around an important transformer substation and a power transmission network frame, a meteorological information acquisition, transmission and storage center is established, and real-time monitoring is carried out based on geographic information and remote sensing images; the weather information access is to acquire forecast and real-time weather information from weather stations.
(6) And monitoring and managing the system operation condition in real time, wherein the monitoring objects comprise power grid operation data, a communication channel, a system network, the application subsystem operation condition and automatic system machine room operation environment monitoring, processing the data, and reporting the operation condition of the application subsystem to a worker in a short message mode.
The power grid control device comprises a power generation control module and a voltage control module.
The power grid control in the dispatching application is to realize closed-loop regulation of a power grid by utilizing real-time information of the power grid and combining real-time dispatching plan information and real-time mode information to automatically regulate and control equipment, and mainly comprises power generation control and voltage control.
The power generation control module enables power generation to automatically track load changes by controlling active power of the generator set in the dispatching area, maintains system frequency as a rated value, maintains exchange power of a power grid tie line, monitors reserve capacity, and achieves load frequency control, reserve capacity calculation, control area and unit performance assessment.
The control and evaluation can be performed according to the Al, A2 standard and CPS1, CPS2 standard of the north american electric reliability committee.
The power generation control module receives and processes real-time telemetering and telesignaling data, and the data comprises system frequency, tie line exchange power, time difference, regional control deviation issued by superior scheduling, unit active power, unit regulation upper and lower limits, unit controlled state and unit rising/falling power locking signals.
The running state of the power generation control module comprises an online state, an offline state and a pause state. The online state is that all functions are put into normal operation to carry out closed-loop control; the offline state does not issue control commands to the unit, but the functions of data processing, regional control deviation calculation, performance monitoring and the like are normally operated; when the pause state causes the area control deviation calculation error due to some abnormal measurement data, the calculation is paused; the three states can be switched according to the measured data condition and the power grid state.
The control mode of the power generation control module comprises.
And (4) performing constant frequency control, namely maintaining the system frequency to be constant, wherein only frequency components are contained in the area control deviation calculation formula.
And determining the tie line exchange power control, and keeping the tie line exchange power constant, wherein at the moment, only the tie line exchange power component is contained in the area control deviation calculation formula.
And controlling the system frequency and the junctor exchange power simultaneously by using the junctor and the frequency deviation, wherein the frequency component and the junctor exchange power component are simultaneously contained in the region control deviation calculation formula.
The power generation control module corrects clock errors generated by system frequency deviation and unintentional exchange electric quantity generated when net exchange power deviates from a planned value in the control process, and the time difference correction and the electric quantity compensation support two starting modes, namely manual or automatic.
The voltage control module is used for monitoring and automatically controlling the bus voltage of the power grid, the reactive power of the generator and the reactive power flow of the power grid; and analyzing and calculating by using real-time data of the power grid and a real-time mode provided by state estimation, carrying out online closed-loop control on the reactive power adjustable equipment, and carrying out reactive power optimization.
On the premise of meeting the operation and safety constraints of the power grid, the reactive power optimization takes the minimization of the network loss of the whole power grid as an optimization target, provides the optimized set values of the central bus voltage and the reactive power of the key connecting lines of each partition, and supports operation monitoring, control decision, coordination control, control execution and locking.
The function can coordinate the voltage control of each level of power grids such as national power grid, regional power grid, provincial power grid, ground power grid and the like, ensure the voltage safety and quality of the whole interconnected power grid, and realize the reactive layered partition balance. In addition, historical records and examination statistical information can be provided, so that users can conveniently inquire, analyze and evaluate the reactive voltage control effect, and meanwhile, the statistical information is also used as the basis for power grid reactive voltage management.
The voltage control module performs online optimization closed-loop control on reactive voltage equipment such as reactive power of a generator, an on-load tap changer, a switchable reactive power compensation device, a static reactive power compensation device and the like based on the collected real-time operation data of the power grid, and realizes a reactive voltage grading control mode.
The power grid analysis device is used for.
(1) And carrying out topology analysis on the network, determining a network wiring model, establishing a network bus model and an electric island model, and providing the network bus model and the electric island model for other applications and modules.
(2) According to the network wiring information, the network parameters, the redundant analog measurement value and the switching value state, the estimation values of the bus voltage amplitude and the phase angle are obtained, suspicious data are detected, bad data are identified, the accuracy of real-time measurement is checked, all branch power flows are calculated, and power grid power flow solutions are provided for the observable part and the unobservable part of the power system. And the state estimation generates complete real-time network state data and provides real-time operation mode data for other applications and modules.
(3) Analyzing the running state of the power grid in a real-time mode and various hypothetical modes, and calculating the state quantity (phase angle and amplitude value of voltage) of each bus and the active power and reactive power of each branch of the network according to the given injection power and the bus voltage on the basis of a network topology model.
(4) Calculating the sensitivity of the active power of a set to the active power flow of a line, the active power of the set to the section flow, the reactive power of the set to the bus voltage and reactive compensation equipment to the bus voltage and the sensitivity of a transformer tap to the bus voltage by using the operation data and mode data of the power grid; and calculating the sensitivity and penalty factors of the network active loss to the unit active power, the regional exchange power, the tie line power and the like.
(5) The method comprises the steps of evaluating the influence on the safe operation of the power system when elements (including lines, transformers, generators, loads, buses and the like) or element combinations in the power system break down, calculating the operation state of the system when the elements break down after the failures occur, evaluating the safety level of the whole power grid, warning the failures threatening the safe operation of the power grid (such as line overload, voltage violation, generator power violation and the like), and evaluating the influence of the failures on the safe operation of the system.
(6) And calculating the active power flow and the transmission capacity of the system connecting line, the outlet section of the large power plant, the important line or section under the real-time and future ground state or N-1 condition.
(7) And calculating the current of each branch circuit and the voltage of each bus after the fault according to the specified fault conditions (including various short-circuit faults and disconnection faults) so as to check the breaking capacity of the switch.
(8) The method comprises the steps of combining network equivalence between upper and lower levels of scheduling, realizing online static equivalence of external networks of each lower level of scheduling by the upper level of scheduling, and supporting the access and processing of external network equivalence models by the lower level of scheduling.
(9) And performing dynamic operation evaluation on the operation of the power grid, and performing statistical analysis on the safe and economic operation level, plan execution and operation condition of a technical support system of the power grid by using the output result of the real-time monitoring and early warning application, thereby providing support for scheduling operation and analysis.
The dispatching simulation device comprises a power system simulation module, a teaching simulation module and a control simulation module; wherein.
The dispatching simulation device provides an operation simulation function under a normal state of the power grid, supports training and practicing under an accident state of the power grid, and supports joint anti-accident exercise.
The power system simulation module establishes a steady-state and dynamic model for the primary equipment of the power system to realize the simulation of the steady state, the transient state and the medium-and-long-term dynamic state of the power system, and simultaneously models the secondary equipment of the power system, including a relay protection and a safety automatic device) and a data acquisition system.
The electric power system simulation module obtains a real-time mode from the network analysis of a real-time state, or obtains a stored historical research mode through a basic platform to be used as an initial section of a training teaching plan; acquiring a power grid network model from unified model management provided by a platform, and supporting training based on an online model and a future model; and meanwhile, a power grid secondary equipment model is obtained from secondary equipment model management provided by the platform, and the data are subjected to initialized integration and processing to generate a training simulation operation initial environment.
The power system simulation comprises data acquisition simulation. The simulated remote measurement and remote signaling can be transmitted to a power grid real-time monitoring and intelligent alarm module in a simulated state, so that network analysis, real-time scheduling planning and power grid automatic control in the simulated state are supported; and the simulation remote control, remote regulation and automatic power grid control instructions can be received, and the effect and influence of various external control devices on the simulation state of the power system can be displayed.
The teaching simulation module is used for teaching plan making, training control and training evaluation in training. The teaching plan can be compiled, the training initial section adjustment making and management and the training event sequence making and management are included, the control operations of starting, pausing, continuing, backspacing, replaying and ending of the training process are supported, the training process information is recorded, corresponding report data is formed, and meanwhile, the training tasks are evaluated.
The control simulation module is used for establishing an application environment in the trainee training process and realizing the simulation of the control center. In this environment, the trainee can apply various analysis tools to monitor and control the power grid in a simulation state. The method comprises the following steps: the remote measurement and remote signaling of data acquisition simulation are used as input, remote control, remote regulation operation and control instructions are sent to the power system model, and real-time plan regulation means and effects are simulated.
The dispatching simulation device with the function of combining multistage dispatching and anti-accident maneuver of the large power grid greatly improves the capability of dispatching and operating personnel of each stage of power grid for cooperatively managing power grid operation and handling large power grid accidents, and well meets the requirements of real-time disaster monitoring and training simulation of the extra-high voltage alternating current-direct current interconnected large power grid.
The disaster monitoring device, the power grid control device, the power grid analysis device and the dispatching simulation device can realize subsystem functions through corresponding modules, the disaster monitoring device, the power grid control device, the power grid analysis device and the dispatching simulation device are connected with one another through logic or electricity, and the modules are connected with one another through logic or electricity, and the specific functions of the modules can be realized by a physical processor executing program codes stored in a memory.
The invention can collect and monitor various disasters and faults and carry out corresponding scheduling simulation, has the simulation scheduling device with the function of large power grid multi-stage scheduling combined anti-accident exercise, greatly improves the capability of scheduling and operating personnel of all stages of power grids to cooperatively manage power grid operation and process large power grid accidents, and well meets the requirements of real-time disaster monitoring and training simulation of the extra-high voltage alternating current-direct current interconnected large power grid.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (1)
1. An electrical disaster monitoring and simulation system, comprising: the system comprises a disaster monitoring device, a power grid control device, a power grid analysis device and a scheduling simulation device; wherein,
the disaster monitoring device is used for:
(1) Flood data acquisition, water affair calculation, hub operation and watershed monitoring; the flood data acquisition comprises telemetering data acquisition, flood forecasting data acquisition and processing and data communication; the water affair calculation comprises real-time data processing, conventional data processing and water affair calculation processing; the hub operation is to comprehensively monitor the hydro-junction; the river basin monitoring is to monitor river basin or sub-river basin intervals based on a bitmap and a Geographic Information System (GIS);
(2) Receiving and storing lightning data, generating a lightning trend graph, generating a lightning activity alarm of the power grid equipment, inquiring the position of a line lightning fault, judging whether the line tripping property is caused by lightning, and generating a power grid lightning activity report and a lightning activity intensity distribution graph through statistical analysis;
(3) The unit monitoring comprises real-time monitoring of flue gas desulfurization of a coal-fired unit, on-line monitoring of coal consumption of a thermal power unit and on-line monitoring of thermal load of a thermoelectric unit; performing on-line acquisition, transmission, processing, calculation and analysis on thermal power and electric power data of a thermal power plant desulfurization system, a thermal power generating unit for supplying power and coal consumption, and a heat supply unit;
(4) Monitoring wind power and photovoltaic power generation related data, wherein the wind power data monitoring is realized by acquiring meteorological elements in a regional range of a wind power plant in real time, monitoring the wind power change condition of the wind power plant and providing a data source for output prediction of a wind turbine generator; monitoring and receiving external meteorological data by photovoltaic power generation data, analyzing the external meteorological data into solar panel voltage and battery voltage data, and providing a data source for output prediction of a photovoltaic power generation unit;
(5) The method comprises the following steps of meteorological monitoring and meteorological information access, wherein the meteorological monitoring is to arrange various automatic meteorological observation, image monitoring and lightning monitoring facilities around an important transformer substation and a power transmission grid frame, establish a meteorological information acquisition, transmission and storage center and carry out real-time monitoring based on geographic information and remote sensing images; weather information access is to obtain forecast and real-time weather information from weather stations;
(6) Monitoring and managing the system operation condition in real time, wherein the monitoring objects comprise power grid operation data, a communication channel, a system network, an application subsystem operation condition and automation system machine room operation environment monitoring, processing the data, and reporting the operation condition of the application subsystem to a worker in a short message mode;
the power grid control device comprises a power generation control module and a voltage control module;
the power generation control module controls the active power of the generator set in the dispatching area to enable power generation to automatically track load change, maintains the system frequency as a rated value, maintains the exchange power of a power grid tie line, monitors the reserve capacity, and realizes load frequency control, reserve capacity calculation, control area and unit performance assessment;
the power generation control module receives and processes real-time remote measurement and remote signaling data, including system frequency, tie line exchange power, time difference, regional control deviation issued by upper-level scheduling, unit active power, unit regulation upper and lower limits, unit controlled state and unit ascending/descending power locking signals;
the running state of the power generation control module comprises an online state, an offline state and a pause state;
the control modes of the power generation control module comprise:
constant frequency control, namely maintaining the system frequency constant, wherein at the moment, the regional control deviation calculation formula only contains frequency components;
determining the exchange power control of the call wire, and maintaining the exchange power of the call wire to be constant, wherein at the moment, the regional control deviation calculation formula only comprises the exchange power component of the call wire;
controlling the system frequency and the junctor exchange power simultaneously by using the junctor and the frequency deviation, wherein at the moment, the regional control deviation calculation formula simultaneously comprises a frequency component and a junctor exchange power component;
the power generation control module corrects a clock error generated by system frequency deviation and unintentional exchange electric quantity generated when net exchange power deviates from a planned value in a control process, and the time difference correction and the electric quantity compensation support two starting modes, namely manual or automatic;
the voltage control module is used for monitoring and automatically controlling the bus voltage of the power grid, the reactive power of the generator and the reactive power flow of the power grid; performing analysis and calculation by using real-time data of a power grid and a real-time mode provided by state estimation, performing online closed-loop control on the reactive power adjustable and controllable equipment, and performing reactive power optimization;
on the premise of meeting the operation and safety constraints of the power grid, the reactive power optimization takes the minimization of the network loss of the whole power grid as an optimization target, provides the optimized set values of the voltage of the central bus of each partition and the reactive power of the key connecting lines, and simultaneously supports operation monitoring, control decision, coordination control, control execution and locking;
the voltage control module performs online optimized closed-loop control on reactive power of a generator, an on-load tap changer tap, a switchable reactive compensation device and static reactive compensation device reactive voltage equipment based on the acquired real-time operation data of the power grid, so as to realize a reactive voltage grading control mode;
the power grid analysis device is used for:
(1) Carrying out topology analysis on a network, determining a network wiring model, establishing a network bus model and an electric island model, and providing the network bus model and the electric island model for other applications and modules;
(2) According to the network wiring information, the network parameters, the redundant analog measurement value and the switching value state, the estimation values of the bus voltage amplitude and the phase angle are obtained, suspicious data are detected, bad data are identified, the accuracy of real-time measurement is checked, all branch power flows are calculated, and a power grid power flow solution is provided for an observable part and an unobservable part of a power system; the state estimation generates complete real-time network state data, and provides real-time operation mode data for other applications and modules;
(3) Analyzing the running state of the power grid in a real-time mode and various hypothetical modes, and calculating the state quantity of each bus and the active power and the reactive power of each branch of the network according to the given injection power and the bus voltage on the basis of a network topology model;
(4) Calculating the sensitivity of the active power of the set to the active power flow of the line, the active power of the set to the section flow, the reactive power of the set to the bus voltage and reactive compensation equipment switching to the bus voltage and the sensitivity of a transformer tap to the bus voltage by using the operation data and mode data of the power grid; calculating sensitivity and penalty factors of network active loss to unit active power, regional exchange power and tie line power;
(5) Evaluating the influence on the safe operation of the power system when an element or an element combination in the power system fails, calculating the operation state of the system when the element exceeds the limit after the failure occurs, evaluating the safety level of the whole power grid, warning the failure threatening the safe operation of the power grid, and evaluating the influence of the failure on the safe operation of the system;
(6) Calculating the active power flow and the transmission capacity of a system connecting line, a large power plant outgoing line section, an important line or section under real-time and future ground states or N-1 conditions;
(7) Calculating the current of each branch circuit and the voltage of each bus after the fault according to the specified fault condition, and checking the breaking capacity of the switch;
(8) Joint network equivalence between upper and lower levels of scheduling, wherein the upper level of scheduling realizes online static equivalence of external networks of each lower level of scheduling, and the lower level of scheduling supports the access and processing of an external network equivalence model;
(9) Performing dynamic operation evaluation on the operation of the power grid, and performing statistical analysis on the safe and economic operation level, plan execution and operation conditions of a technical support system of the power grid by using the output result of real-time monitoring and early warning application to provide support for scheduling operation and analysis;
the dispatching simulation device comprises a power system simulation module, a teaching simulation module and a control simulation module; wherein,
the power system simulation module establishes a steady-state and dynamic model for the primary equipment of the power system to realize the simulation of the steady state, the transient state and the medium and long term dynamic state of the power system, and simultaneously models the secondary equipment of the power system, including a relay protection and safety automatic device and a data acquisition system;
the electric power system simulation module obtains a real-time mode from the network analysis of a real-time state, or obtains a stored historical research mode through a basic platform to be used as an initial section of a training teaching plan; acquiring a power grid network model from unified model management provided by a platform, and supporting training based on an online model and a future model; meanwhile, a power grid secondary equipment model is obtained from secondary equipment model management provided by a platform, and the data are subjected to initialized integration and processing to generate a training simulation operation initial environment;
the simulation of the power system comprises data acquisition simulation; the simulated remote measurement and remote signaling are transmitted to a power grid real-time monitoring and intelligent warning module in a simulated state, so that network analysis, real-time scheduling planning and power grid automatic control in the simulated state are supported; receiving simulated remote control, remote regulation and automatic control instructions of the power grid, and displaying the effect and influence of various external control devices on the simulation state of the power system;
the teaching simulation module is used for teaching plan making, training control and training evaluation in training; compiling a teaching plan, including adjusting and managing a training initial section and making and managing a training event sequence, supporting the control operations of starting, pausing, continuing, returning, replaying and ending of a training process, recording the information of the training process, forming corresponding report data, and evaluating a training task;
the control simulation module is used for establishing an application environment in the trainee training process to realize the simulation of the control center; in the environment, students monitor and control the power grid in a simulation state by applying various analysis tools; the method comprises the following steps: the remote measurement and remote signaling of data acquisition simulation are used as input, remote control, remote regulation operation and control instructions are sent to the power system model, and real-time plan adjustment means and effects are simulated.
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