CN104881317A - Corresponding-period grid-connection simulation platform and simulation system of pumped power storage unit under different working conditions - Google Patents
Corresponding-period grid-connection simulation platform and simulation system of pumped power storage unit under different working conditions Download PDFInfo
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Abstract
The invention discloses a corresponding-period grid-connection simulation platform and simulation system of a pumped power storage unit under the different working conditions. A simulation function is provided for corresponding-period grid-connection research of the pumped power storage unit. The corresponding-period grid-connection simulation platform comprises a pumped power storage unit module, an infinite power grid module, a stationary frequency converter, a back-to-back starting unit module, a main transformer module, an SFC output transformer module, a step-down transformer, a corresponding-period adjusting module, an excitation control module, a water turbine speed regulation module, a back-to-back starting speed regulation module, a grid-connection circuit breaker module, a starting circuit breaker module, a first voltage monitoring module, a second voltage monitoring module, a rotation speed detection module and a monitoring system module. Simulation models of the pumped power storage unit under the different working conditions can be established by combining and adjusting functional modules, and a grid-connection simulation function of the pumped power storage unit under multiple operating working conditions including generator working conditions, water pump working condition back-to-back starting, water pump working conditions, SFC starting and the like and multiple starting modes can be achieved.
Description
Technical field
The present invention relates to power facility simulation field, particularly relate to simultaneous interconnecting emulation platform and analogue system under the different operating mode of pump-storage generator.
Background technology
Hydroenergy storage station is with multiple operating conditions such as generating electricity, draw water, by the conversion between operating mode, hydroenergy storage station can realize the multinomial critical functions such as peak-clipping and valley-filling, frequency modulation phase modulation, Voltage Cortrol, the various operating conditions of hydroenergy storage station all need to be incorporated into the power networks with electric system, but under different operating mode, the requirement of pump-storage generator to simultaneous interconnecting is different.
Pump-storage generator is grid-connected is very important operation, and operation is more frequent.And network process can produce certain dash current; if dash current is excessive; G-T protective error action of device not only can be made to do; cause grid-connected failure; and the electric power that dash current produces can bring adverse effect to the safe operation of the hydraulic turbine and gen-set; can generating set be damaged time serious, bring huge economic loss.Therefore the simultaneous interconnecting research under the different operating condition of pump-storage generator is carried out, to the safe and stable operation improving pump-storage generator and power station, significant.
Summary of the invention
Object of the present invention is exactly to solve the problem, simultaneous interconnecting emulation platform and analogue system under the different operating mode of pump-storage generator are provided, this platform can emulate preferably the different operating condition of pump-storage generator, unit, simultaneous interconnecting each controlling unit and from unit starting to completing grid-connected complete dynamic process.
To achieve these goals, the present invention adopts following technical scheme:
Simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator, comprising:
Infinitely great electrical network module, is used for simulating infinitely great electrical network;
Pump-storage generator module, realizes, to the modeling and simulation function of pump-storage generator, adopting reversible Synchronous Machine Models, doubling as motor and hydrogenerator, realize the emulation to multiple operating condition; Exciting current and frequency two parameters of pump-storage generator to regulate, and can accept the conditioning signal from excitation con-trol module and frequency control module, and make response to conditioning signal;
First voltage monitoring module, for gathering or monitoring pump-storage generator set end voltage information, and information is supplied to excitation con-trol module and the same period adjustment module;
Second voltage monitoring module, for gathering or monitor the information of voltage of infinitely great electrical network, and is supplied to adjustment module and the static frequency changer SFC module same period by information;
Monitoring system module, comprise measurement module, logging modle and display module, according to the needs of emulation, provide the measurement result of required electric parameters, form the simulation result represented by effective value, perunit value or graphical format, for researchist provides foundation to simulation result and data analysis;
The same period adjustment module, before emulation starts, can pre-set and network parameters in this module, in accurate same period process, the electric parameters relevant to also network process according to the parameter request preset regulates by this module, sends switching signal when each electric parameters meets and presets grid-connected conditions; The machine end of collection pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage and generating unit speed arrive certain value, namely the set end voltage of pump-storage generator reaches rated voltage, when pump-storage generator rotating speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage and frequency, make pump-storage generator meet grid-connected conditions, and send grid-connected signal when phase angle difference meets default grid-connected requirement when between pump-storage generator and electrical network; Described and network parameters can be modified as required, to investigate different and under network parameters simultaneous interconnecting process;
Grid-connected breaker module, is used for connecting pump-storage generator module and infinitely great electrical network module, completes the also net operation of unit;
Excitation con-trol module, controls the exciting current size of pump-storage generator; Excitation con-trol module acquires pump-storage generator set end voltage, according to collection pump-storage generator set end voltage size adjustment field voltage and then change exciting current, and can accept to come from outside adjustment of field excitation signal, the adjustment of field excitation signal of Tathagata automatic self synchronizing adjustment module, reaches the object of the set end voltage regulating unit;
Rotation speed measuring module, when pump-storage generator module directly can not provide real-time rotate speed for measuring pump-storage generator rotating speed;
Main-transformer module, boosts to generator port voltage, realizes the electrical connection of generator and infinitely great electrical network;
Water turbine governing module, for the adjustment of pump-storage generator rotating speed; Gather the rotary speed information of pump-storage generator, adjusting rotary speed is carried out by the input torque changing pump-storage generator model, and can accept to come from outside frequency adjusting signals, the frequency adjusting signals of Tathagata automatic self synchronizing adjustment module, realizes the adjustment to pump-storage generator rotating speed; Or
Back-to-back startup power module group, comprises back-to-back startup power module, back-to-back startup speed adjusting module and starts breaker module, for building the grid-connected realistic model of back-to-back startup; Or
SFC starts power module group, comprising downconverter tacho module, static frequency changer SFC module, SFC output transformer module and starts breaker module, starting grid-connected realistic model for building SFC;
Based on above-mentioned module, can require build different realistic models according to emulation experiment, the simultaneous interconnecting realistic model under the simulation different operating condition of pump-storage generator and different operating mode.
Described infinitely great electrical network module employing capacity is the synchro generator model of more than 10 times of pump-storage generator capacity.
The information of voltage of described first voltage monitoring module and the second voltage monitoring module acquires or supervision comprises amplitude, frequency and phase angle information.
Described back-to-back startup power module group comprises:
Start breaker module, connect pump-storage generator module and start power supply, starting circuit for break-make;
Back-to-back startup speed adjusting module, the rotating speed completing back-to-back startup unit controls, and gathers the rotary speed information of pump-storage generator, carrys out adjusting rotary speed, realize the adjustment to pump-storage generator frequency by the input torque changing pump-storage generator model;
Back-to-back startup set modules, for realizing the back-to-back startup of pump-storage generator, in Back To Back Startup Procedure, starting current is provided to pump-storage generator as startup power supply, and can unloading phase accept the control signal of back-to-back startup speed adjusting module, accept the control signal of the adjustment module same period in the grid-connected stage, regulate size and the frequency of starting current, complete the startup of pump-storage generator.
Described back-to-back startup set modules adopts synchro generator model to replace.
Described SFC starts power module group and comprises:
Static frequency changer SFC module, wherein, SFC is the abbreviation of Static Frequency Converter, has been the nucleus equipment of pump-storage generator variable frequency starting, the starting current of frequency change can not only be provided for unit starting, can also the machine class frequency under the operating condition that draw water be controlled;
SFC output transformer module, compresses into row boosting, starts for pump-storage generator by the variable-frequency electric that static frequency changer SFC module exports;
Step-down transformer module, for static frequency changer SFC module provides operating voltage, the high-pressure side of step-down transformer module is connected with infinitely great electrical network, low-pressure side and static frequency changer SFC model calling;
Described static frequency changer SFC module, comprises main circuit and control circuit; Main circuit comprises net-side rectifier, direct current reactor and pusher side inverter; Control circuit comprises net-side rectifier control module and pusher side Inverter control module; Net-side rectifier control module accept the second voltage monitoring module acquires to voltage on line side information and the DC current information that exports of the direct current reactor that arrives of current monitoring module acquires, static frequency changer SFC module controls motor electromagnetic torque based on this information; Net-side rectifier control module provides control signal to net-side rectifier, controls rectifier current output; Pusher side Inverter control module accepts the voltage magnitude of the machine end of the pump-storage generator that the same period, adjustment module collected and infinitely great grid side, frequency and phase angle information, also accept the current rotating speed that rotation speed measuring module collects, also has given rotary speed information, control signal is provided to pusher side inverter, Main Function is the trigger of given inverter, controls output frequency; By the cooperation of main circuit and control circuit, simulate that pulse phase change starts, load commutated starts and the dynamic perfromance of static frequency changer SFC module in same period adjustment process.
Based on the grid-connected analogue system of pump-storage generator generator operation operating mode of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator,
The delivery of electrical energy relation of the grid-connected analogue system of pump-storage generator generator operation operating mode is as follows:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module.
The signal circulation relation of the grid-connected analogue system of pump-storage generator generator operation operating mode is as follows: the first voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with water turbine governing model calling, excitation con-trol module and water turbine governing module all with pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and water turbine governing module; The pump-storage generator rotary speed information collected is delivered to water turbine governing module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, by water turbine governing module, pump-storage generator frequency is regulated, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network.
Before grid-connected, grid-connected isolating switch disconnects, pump-storage generator starts under the effect of excitation con-trol module and water turbine governing module, operate in no-load generator state, make its voltage and rotating speed reach ratings, reach the requirement dropping into the adjustment module same period, subsequently, adjustment module will regulate unit voltage, by water turbine governing module regulator generator synchronizing frequency by excitation con-trol module the same period
Regulate through the same period, voltage difference between pump-storage generator and electrical network and difference on the frequency meet grid-connected requirement, and send grid-connected signal according to phase angle difference condition, after the isolating switch outlet loop actuation time same period and the breaker closing same period two constant time lags actuation time, grid-connected breaker closing, complete and network process, in whole simulation process, utilize monitoring system module record electrical data.
To draw water the grid-connected analogue system of back-to-back startup under operating condition based on the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator,
The pump-storage generator delivery of electrical energy relation of the grid-connected analogue system of back-to-back startup under operating condition of drawing water is as follows:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module, and back-to-back startup power module connects pump-storage generator module by starting breaker module.
The pump-storage generator signal circulation relation of the grid-connected analogue system of back-to-back startup under operating condition of drawing water is as follows:
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period, adjustment module was also connected with startup breaker module, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and back-to-back startup speed adjusting module; The pump-storage generator rotary speed information collected is delivered to back-to-back startup speed adjusting module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to utilize excitation con-trol module to regulate pump-storage generator voltage, back-to-back startup speed adjusting module is utilized to regulate pump-storage generator frequency, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network.
Pump-storage generator starts under the operating condition that draws water, first breaker closing is started, grid-connected isolating switch disconnects, back-to-back startup power module is regulated by back-to-back startup speed adjusting module, the frequency making back-to-back startup power module export electric energy progressively rises, the synchronous rotational speed of pump-storage generator module progressively rises thereupon, pump-storage generator rotating speed is made progressively to reach synchronous rotational speed, adjustment of field excitation module regulates the set end voltage of pump-storage generator simultaneously, make it to reach ratings, drop into the adjustment module same period;
The same period, adjustment module carried out voltage and frequency adjustment, frequency adjustment is carried out by back-to-back startup speed adjusting module, simultaneously, the grid-connected signal that the same period, adjustment module sent is first after the isolating switch outlet actuation time same period and back-to-back startup power supply mute time, isolating switch will be started disconnect, pump-storage generator is in the unloaded Electro dynamic machine running status relying on inertia, again after breaker closing action delay, closed grid-connected isolating switch, complete and network process, in whole simulation process, utilize monitoring system module record electrical data.
Grid-connected analogue system is started based on the SFC under operating condition that draws water of the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator,
Pump-storage generator draws water, and to start the delivery of electrical energy relation of grid-connected analogue system as follows for SFC under operating condition:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module; Infinitely great electrical network module is connected static frequency changer SFC module, SFC output transformer module successively by step-down transformer module, is started breaker module and pump-storage generator module.
Pump-storage generator draws water, and to start the signal circulation relation of grid-connected analogue system as follows for SFC under operating condition:
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to adjustment module and the static frequency changer SFC module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with startup breaker module and static frequency changer SFC model calling, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and static frequency changer SFC module; The pump-storage generator rotary speed information collected is delivered to static frequency changer SFC module by rotation speed measuring module; The current amplitude of current monitoring module acquires is supplied to the net-side rectifier control module of static frequency changer SFC module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, start power module group by SFC to regulate pump-storage generator frequency, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network.
Pump-storage generator starts under the operating condition that draws water, first breaker closing is started, grid-connected isolating switch disconnects, the frequency that control circuit in static frequency changer SFC module controls static frequency changer SFC module output electric energy progressively rises, pump-storage generator rotating speed is made progressively to reach synchronous rotational speed, adjustment of field excitation module regulates the set end voltage of pump-storage generator simultaneously, makes it to reach ratings, drops into the adjustment module same period;
The same period, adjustment module frequency adjustment was undertaken by the static frequency changer module input adjustment module same period, now, the grid-connected signal sent is first after the isolating switch outlet actuation time same period and static frequency changer SFC module stopping and excising time delay, to start isolating switch to disconnect, unit relies on the no-load running of inertia short time, after breaker closing action delay, closed grid-connected isolating switch, complete and network process, in whole simulation process, utilize monitoring system module record electrical data.
Beneficial effect of the present invention:
(1) utilize this emulation platform can emulate pump-storage generator independent operating, generate electricity by way of merging two or more grid systems or the grid-connected different operating condition that draws water, observation excitation con-trol module and water turbine governing module work are on the impact of pump-storage generator operation characteristic, the data such as the meritorious and reactive power of generating unit speed (frequency), set end voltage, output current, output can be obtained by monitoring system module, the feature under the different operating condition of pump-storage generator is analyzed;
(2) can emulate Back To Back Startup Procedure under pump-storage generator pumping operation mode and and network process, obtain the parameter such as generating unit speed, torque curve, set end voltage, grid-connected dash current of start-up course by monitoring system module, be convenient to investigate back-to-back startup and and the Changing Pattern of pump-storage generator operational factor in network process;
(3) can emulate static frequency changer SFC start-up course under pump-storage generator pumping operation mode and and network process, obtain the rotating speed of start-up course and the torque parameter such as change curve, set end voltage, generating unit speed, grid-connected dash current in time by monitoring system module, be convenient to investigate SFC start and and the Changing Pattern of pump-storage generator operational factor in network process;
(4) the simultaneous interconnecting process under pump-storage generator generating operation mode can be emulated.Obtain the parameter such as set end voltage, machine class frequency, grid-connected dash current and impact torque by monitoring system module, the grid-connected impact to difference and under network parameters is analyzed, and is convenient to check the different and grid-connected effect of network parameters, obtains optimum and network parameters.
(5) the simultaneous interconnecting research under adopting the mode of emulation to carry out the different operating condition of pump-storage generator, there is the advantages such as modeling process is convenient, model modification convenient, computational accuracy is high, simulated object type is various, for research pump-storage generator operation characteristic, analysis simultaneous interconnecting dash current, there is vital role.
Accompanying drawing explanation
Fig. 1 is the grid-connected analogue system under pump-storage generator generator operation operating mode;
Fig. 2 is the grid-connected analogue system of back-to-back startup that pump-storage generator draws water under operating condition;
Fig. 3 is that the SFC that pump-storage generator draws water under operating condition starts and network simulation;
Fig. 4 is the module diagram of static frequency changer SFC module.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As Figure 1-3, simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator, comprising:
Pump-storage generator module, this module realizes the modeling and simulation function to pump-storage generator, adopts reversible Synchronous Machine Models, can double as motor and hydrogenerator, realize the emulation to multiple operating condition.
In addition, the exciting current of pump-storage generator and frequency (i.e. generator speed) two parameters can regulate, and can accept the conditioning signal from excitation con-trol module, frequency control module, and make response to conditioning signal.
Infinitely great electrical network module, this module is used for simulating infinitely great electrical network, adopts synchro generator model (its capacity is more than 10 times of pump-storage generator capacity) that capacity is enough large as infinitely great electric network model.
Static frequency changer SFC module, SFC is the abbreviation of Static Frequency Converter, it has been the nucleus equipment of pump-storage generator variable frequency starting, static frequency changer SFC module can not only provide the unit starting process alternating current that medium frequency progressively raises, can also complete the operating condition that draws water grid-connected time unit frequency adjustment.
Static frequency changer SFC module, comprises main circuit and control circuit; Main circuit comprises net-side rectifier, direct current reactor and pusher side inverter; Control circuit comprises net-side rectifier control module and pusher side Inverter control module; Net-side rectifier control module accept the second voltage monitoring module acquires to voltage on line side information and the DC current information that exports of the direct current reactor that arrives of current monitoring module acquires, static frequency changer SFC module controls motor electromagnetic torque based on this information; Net-side rectifier control module provides control signal to net-side rectifier, controls rectifier current output; Pusher side Inverter control module accepts the voltage magnitude of the machine end of the pump-storage generator that the same period, adjustment module collected and infinitely great grid side, frequency and phase angle information, also accept the current rotating speed that rotation speed measuring module collects, also has given rotary speed information, control signal is provided to pusher side inverter, Main Function is the trigger of given inverter, controls output frequency; By the cooperation of main circuit and control circuit, simulate that pulse phase change starts, load commutated starts and the dynamic perfromance of static frequency changer SFC module in same period adjustment process.
Back-to-back startup set modules, this module is used for realizing the back-to-back startup function of pump-storage generator.In Back To Back Startup Procedure, this module provides electric current as startup power supply to pump-storage generator, and can according to the frequency of the Signal Regulation output current of synchronous device, and this module adopts synchro generator model to replace.
Main-transformer module, main-transformer is also called grid-connected transformer, and its effect is boosted to generator port voltage, realizes the electrical connection of generator and infinitely great electrical network.
SFC output transformer module, the effect of this module is that the variable-frequency electric that static frequency changer SFC module exports is compressed into row boosting, starts for pump-storage generator.
Step-down transformer module, this module provides operating voltage for static frequency changer SFC module, and the high-pressure side of step-down transformer module is connected with infinitely great electrical network, low-pressure side and static frequency changer SFC model calling.
The same period adjustment module, the effect of this module be accurate same period process to and network parameters regulate, send switching signal when each parameter meets grid-connected conditions.
The same period, adjustment module adopted the voltage magnitude of machine end and the infinitely great grid side of taking out the accumulation of energy unit that catchments, frequency and phase angle information, when set end voltage and generating unit speed arrive certain value, (set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed), the same period, adjustment module started to regulate pump-storage generator voltage and frequency (to adopt PID regulative mode, but also can take other regulative mode as required), make unit meet grid-connected conditions, and send grid-connected signal when phase angle difference meets default grid-connected requirement when between unit and electrical network.Above-mentioned and network parameters can be modified as required, to investigate different and under network parameters simultaneous interconnecting process.
Excitation con-trol module, the effect of this module controls the exciting current size of pump-storage generator.Excitation con-trol module acquires set end voltage, according to set end voltage size adjustment field voltage and then change exciting current, and can accept the adjustment of field excitation signal of external control signal Tathagata automatic self synchronizing adjustment module, reach the object of the set end voltage regulating unit.
Water turbine governing module, this module mainly completes the regulatory function of machine class frequency.The rotary speed information of water turbine governing module acquires pump-storage generator, carrys out adjusting rotary speed by the input torque changing pump-storage generator model, and can accept the FM signal of other frequency adjustment models, realize the regulatory function to machine class frequency.
Back-to-back startup speed adjusting module, the function of this module has been that the rotating speed of back-to-back startup unit controls, and its adjustment process and method and water turbine governing module class are seemingly.
Grid-connected breaker module, grid-connected breaker module connects pump-storage generator module and infinitely great electrical network module, completes the also net operation of unit.
Start breaker module, this module is used for connecting pump-storage generator module and starting power supply, starts circuit for break-make.
First voltage monitoring module, this module is used for collection, monitoring machine terminal voltage information (comprising amplitude, frequency and phase angle information), and information being supplied to the module such as excitation con-trol and the adjustment same period, this module can be incorporated to monitoring system module hereinafter described.
Second voltage monitoring module, information for gathering, monitoring the information of voltage (comprising amplitude, frequency and phase angle information) of infinitely great electrical network, and is supplied to adjustment module and the SFC module same period by this module, and this module can be incorporated to monitoring system module.
Rotation speed measuring module, this module is for measuring pump-storage generator rotating speed.If pump-storage generator module directly can provide real-time rotate speed, this module can not be set.
Monitoring system module, this module comprises measurement in all or part of l-G simulation test, record and display module, according to the needs of emulation, the measurement result of required electric parameters is provided, can be represented by forms such as valid value, perunit value or curve maps, facilitate researchist to simulation result and data analysis.
As shown in Figure 1, based on the grid-connected analogue system of pump-storage generator generator operation operating mode of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator:
Before grid-connected, grid-connected isolating switch disconnects, pump-storage generator starts under the effect of excitation con-trol module and water turbine governing module, operate in no-load generator state, its voltage and rotating speed is made to reach ratings, reach the requirement dropping into the adjustment module same period, subsequently, adjustment module will regulate unit voltage by excitation con-trol module the same period, by water turbine governing module regulator generator synchronizing frequency, regulate through the same period, voltage difference between pump-storage generator and electrical network and difference on the frequency meet grid-connected requirement, and send grid-connected signal according to phase angle difference condition, after the isolating switch outlet loop actuation time same period and the breaker closing same period two constant time lags actuation time, grid-connected breaker closing, complete and network process, in whole simulation process, utilize monitoring system module logging machine terminal voltage, machine class frequency, the electrical data such as grid-connected dash current.
The delivery of electrical energy relation of the grid-connected analogue system of pump-storage generator generator operation operating mode is as follows:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module.
The signal circulation relation of the grid-connected analogue system of pump-storage generator generator operation operating mode is as follows: the first voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with water turbine governing model calling, excitation con-trol module and water turbine governing module all with pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and water turbine governing module; The pump-storage generator rotary speed information collected is delivered to water turbine governing module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, by water turbine governing module, pump-storage generator frequency is regulated, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network;
As shown in Figure 2, to draw water the grid-connected analogue system of back-to-back startup under operating condition based on the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator:
Pump-storage generator starts under the operating condition that draws water, first breaker closing is started, grid-connected isolating switch disconnects, back-to-back startup power module is regulated by back-to-back startup speed adjusting module, the output electric energy frequency of back-to-back startup power module is made progressively to increase, the synchronous rotational speed of pump-storage generator module progressively rises thereupon, pump-storage generator rotating speed is made progressively to reach synchronous rotational speed, adjustment of field excitation module regulates the set end voltage of pump-storage generator simultaneously, make it to reach ratings, drop into the adjustment module same period;
The same period, adjustment module carried out voltage and frequency adjustment, frequency adjustment is carried out by back-to-back startup speed adjusting module, simultaneously, the grid-connected signal that the same period, adjustment module sent is first after the isolating switch outlet actuation time same period and back-to-back startup power supply mute time, isolating switch will be started disconnect, pump-storage generator is in the unloaded Electro dynamic machine running status relying on inertia, again after breaker closing action delay, closed grid-connected isolating switch, complete and network process, in whole simulation process, utilize monitoring system module logging machine terminal voltage, machine class frequency, the electrical data such as grid-connected dash current.
The pump-storage generator delivery of electrical energy relation of the grid-connected analogue system of back-to-back startup under operating condition of drawing water is as follows:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module, and back-to-back startup power module connects pump-storage generator module by starting breaker module.
The pump-storage generator signal circulation relation of the grid-connected analogue system of back-to-back startup under operating condition of drawing water is as follows:
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period, adjustment module was also connected with startup breaker module, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and back-to-back startup speed adjusting module; The pump-storage generator rotary speed information collected is delivered to back-to-back startup speed adjusting module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, by back-to-back startup speed adjusting module, pump-storage generator frequency is regulated, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network.
As shown in Figure 3, grid-connected analogue system is started based on the SFC under operating condition that draws water of the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator:
Pump-storage generator starts under the operating condition that draws water, first breaker closing is started, grid-connected isolating switch disconnects, the frequency that control circuit in static frequency changer SFC module controls static frequency changer SFC module output electric energy progressively rises, pump-storage generator rotating speed is made progressively to reach synchronous rotational speed, adjustment of field excitation module regulates the set end voltage of pump-storage generator simultaneously, makes it to reach ratings, drops into the adjustment module same period;
The same period, adjustment module frequency adjustment was by being undertaken by the control circuit in static frequency changer SFC module, now, the grid-connected signal sent is first after the isolating switch outlet actuation time same period and static frequency changer SFC module stopping and excising time delay, isolating switch will be started disconnect, unit relies on the no-load running of inertia short time, after breaker closing action delay, closed grid-connected isolating switch, complete and network process, in whole simulation process, utilize the electrical data such as monitoring system module logging machine terminal voltage, machine class frequency, grid-connected dash current.
Pump-storage generator draws water, and to start the delivery of electrical energy relation of grid-connected analogue system as follows for SFC under operating condition:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module; Infinitely great electrical network module is connected static frequency changer SFC module, SFC output transformer module successively by step-down transformer module, is started breaker module and pump-storage generator module.
Pump-storage generator draws water, and to start the signal circulation relation of grid-connected analogue system as follows for SFC under operating condition:
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to adjustment module and the static frequency changer SFC module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with startup breaker module and static frequency changer SFC model calling, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and static frequency changer SFC module; The pump-storage generator rotary speed information collected is delivered to static frequency changer SFC module by rotation speed measuring module; The current amplitude of current monitoring module acquires is supplied to the net-side rectifier control module of static frequency changer SFC module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, by static frequency changer SFC module, pump-storage generator frequency is regulated, make unit meet grid-connected conditions, and send grid-connected signal to grid-connected breaker module when phase angle difference meets default grid-connected requirement when between unit and electrical network.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator, is characterized in that, comprising:
Infinitely great electrical network module, is used for simulating infinitely great electrical network;
Pump-storage generator module, realizes the modeling and simulation to pump-storage generator, can double as motor and hydrogenerator, realizes the emulation to multiple operating condition; The exciting current of pump-storage generator and frequency to regulate, and accepts the conditioning signal from excitation con-trol module and frequency control module, and make response to conditioning signal;
First voltage monitoring module, for gathering or monitoring pump-storage generator set end voltage information, and information is supplied to excitation con-trol module and the same period adjustment module;
Second voltage monitoring module, for gathering or monitor the information of voltage of infinitely great electrical network, and is supplied to adjustment module and the static frequency changer SFC module same period by information;
Monitoring system module, comprise measurement module, logging modle and display module, according to the needs of emulation, provide the measurement result of required electric parameters, form the simulation result represented by effective value, perunit value or graphical format, for researchist provides foundation to simulation result and data analysis;
The same period adjustment module, before emulation starts, can pre-set and network parameters in this module, in accurate same period process, the electric parameters relevant to also network process according to the parameter request preset regulates by this module, sends switching signal when each electric parameters meets and presets grid-connected conditions;
Grid-connected breaker module, is used for connecting pump-storage generator module and infinitely great electrical network module, completes the also net operation of unit;
Excitation con-trol module, controls the exciting current size of pump-storage generator; Excitation con-trol module acquires pump-storage generator set end voltage, according to collection pump-storage generator set end voltage size adjustment field voltage and then change exciting current, and can accept to come from outside adjustment of field excitation signal, reach the object of the set end voltage regulating unit;
Rotation speed measuring module, when pump-storage generator module directly can not provide real-time rotate speed for measuring pump-storage generator rotating speed;
Main-transformer module, boosts to generator port voltage, realizes the electrical connection of generator and infinitely great electrical network;
Water turbine governing module, for the adjustment of pump-storage generator rotating speed; Gather the rotary speed information of pump-storage generator, carry out adjusting rotary speed by the input torque changing pump-storage generator model, and can accept to come from outside adjustment of field excitation signal, realize the adjustment to pump-storage generator rotating speed; Or
Back-to-back startup power module group, for building the grid-connected realistic model of back-to-back startup; Or
SFC starts power module group, starts grid-connected realistic model for building SFC;
Based on above-mentioned module, can require build different realistic models according to emulation experiment, the simultaneous interconnecting realistic model under the simulation different operating condition of pump-storage generator and different operating mode.
2. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 1, is characterized in that, described infinitely great electrical network module adopts capacity to be the synchro generator model of more than 10 times of pump-storage generator capacity.
3. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 1, it is characterized in that, the information of voltage of described first voltage monitoring module and the second voltage monitoring module acquires or supervision comprises amplitude, frequency and phase angle information.
4. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 1, it is characterized in that, described back-to-back startup power module group comprises:
Start breaker module, connect pump-storage generator module and start power supply, starting circuit for break-make;
Back-to-back startup speed adjusting module, the rotating speed completing back-to-back startup unit controls, and gathers the rotary speed information of pump-storage generator, carrys out adjusting rotary speed, realize the adjustment to pump-storage generator frequency by the input torque changing pump-storage generator model;
Back-to-back startup set modules, for realizing the back-to-back startup of pump-storage generator, in Back To Back Startup Procedure, electric current is provided to pump-storage generator as startup power supply, and the control signal of back-to-back startup speed adjusting module, the frequency of the Signal Regulation output current of the adjustment module same period is accepted in the grid-connected stage.
5. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 4, it is characterized in that, described back-to-back startup set modules adopts synchro generator model to replace.
6. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 1, it is characterized in that, described SFC starts power module group and comprises:
Static frequency changer SFC module has been the nucleus equipment of pump-storage generator variable frequency starting, can not only provide the starting current of frequency change, can also control the machine class frequency under the operating condition that draws water for unit starting;
SFC output transformer module, compresses into row boosting, starts for pump-storage generator by the variable-frequency electric that static frequency changer SFC module exports;
Step-down transformer module, for static frequency changer SFC module provides operating voltage, the high-pressure side of step-down transformer module is connected with infinitely great electrical network, low-pressure side and static frequency changer SFC model calling.
7. simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator as claimed in claim 6, it is characterized in that, described static frequency changer SFC module, comprises main circuit and control circuit; Main circuit comprises net-side rectifier, direct current reactor and pusher side inverter; Control circuit comprises net-side rectifier control module and pusher side Inverter control module; Net-side rectifier control module accept the second voltage monitoring module acquires to voltage on line side information and the DC current information that exports of the direct current reactor that arrives of current monitoring module acquires, static frequency changer SFC module controls motor electromagnetic torque based on this information; Net-side rectifier control module provides control signal to net-side rectifier, controls rectifier current output; Pusher side Inverter control module accepts the voltage magnitude of the machine end of the pump-storage generator that the same period, adjustment module collected and infinitely great grid side, frequency and phase angle information, also accept the current rotating speed that rotation speed measuring module collects, also has given rotary speed information, control signal is provided to pusher side inverter, Main Function is the trigger of given inverter, controls output frequency; By the cooperation of main circuit and control circuit, simulate that pulse phase change starts, load commutated starts and the dynamic perfromance of static frequency changer SFC module in same period adjustment process.
8., based on the grid-connected analogue system of pump-storage generator generator operation operating mode of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator described in claim 1, it is characterized in that, comprising:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module;
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with water turbine governing model calling, excitation con-trol module and water turbine governing module all with pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and water turbine governing module; The pump-storage generator rotary speed information collected is delivered to water turbine governing module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, regulated pump-storage generator frequency by water turbine governing module.
9. to draw water back-to-back startup under operating condition the system of network simulation based on the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator described in claim 4, it is characterized in that, comprising:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module, and back-to-back startup power module connects pump-storage generator module by starting breaker module;
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to the adjustment module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period, adjustment module was also connected with startup breaker module, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and back-to-back startup speed adjusting module; The pump-storage generator rotary speed information collected is delivered to back-to-back startup speed adjusting module by rotation speed measuring module; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to utilize excitation con-trol module to regulate pump-storage generator voltage, utilized back-to-back startup speed adjusting module to regulate pump-storage generator frequency.
10. start grid-connected analogue system based on the SFC under operating condition that draws water of the pump-storage generator of simultaneous interconnecting emulation platform under the different operating mode of pump-storage generator described in claim 7, it is characterized in that, comprising:
Infinitely great electrical network module connects grid-connected breaker module, main-transformer module and pump-storage generator module successively; The infinitely great electrical network module of second voltage monitoring model calling; First voltage monitoring model calling is on the line of main-transformer module and pump-storage generator module; Infinitely great electrical network module is connected static frequency changer SFC module, SFC output transformer module successively by step-down transformer module, is started breaker module and pump-storage generator module;
First voltage monitoring module is all connected the adjustment module same period with the second voltage monitoring module, first voltage monitoring module also with excitation con-trol model calling, the information of voltage of the infinitely great electrical network collected is sent to adjustment module and the static frequency changer SFC module same period by the second voltage monitoring module, the first voltage monitoring module the pump-storage generator set end voltage information collected is supplied to excitation con-trol module and the same period adjustment module;
Excitation con-trol module is all connected with the adjustment module same period with grid-connected breaker module, the same period adjustment module also with startup breaker module and static frequency changer SFC model calling, excitation con-trol module and pump-storage generator model calling, rotation speed measuring module connects pump-storage generator module and static frequency changer SFC module; The pump-storage generator rotary speed information collected is delivered to static frequency changer SFC module by rotation speed measuring module; The current amplitude of current monitoring module acquires is supplied to the net-side rectifier control module of SFC; The machine end of adjustment module collection same period pump-storage generator and the voltage magnitude of infinitely great grid side, frequency and phase angle information, when set end voltage reaches rated voltage, when generating unit speed reaches 97% of rated speed, the same period, adjustment module started to regulate pump-storage generator voltage by excitation con-trol module, starts power module group regulate pump-storage generator frequency by SFC.
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