CN201000696Y - Manpower generator unit and electricity network training system based on the same - Google Patents
Manpower generator unit and electricity network training system based on the same Download PDFInfo
- Publication number
- CN201000696Y CN201000696Y CNU200720103473XU CN200720103473U CN201000696Y CN 201000696 Y CN201000696 Y CN 201000696Y CN U200720103473X U CNU200720103473X U CN U200720103473XU CN 200720103473 U CN200720103473 U CN 200720103473U CN 201000696 Y CN201000696 Y CN 201000696Y
- Authority
- CN
- China
- Prior art keywords
- generator
- electric
- power
- generating units
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a manpower electric generator group and a manpower electric generator group based electric network training system, the system comprises a manpower electric generator group, a power network, a load, a communication network and a computer supervisory control system; the manpower electric generator group is connected with the load through the power network; the computer supervisory control system is connected with the manpower electric generator group and the load through the communication network; wherein, the manpower electric generator group is used for electric power generation, speed adjustment and transporting the electric energy to the power network; the load is used for receiving the electric energy which is transported by the electric power generation; the computer supervisory control system is used for mounting electric network training item and controlling and monitoring the operation of the manpower electric generator group and the load device. The utility model incorporates the manpower electric generator group into the electric network for electric power generation, uses for establishing an environmental protection and energy saving type electric network training system which can be agilely operated by the trainees.
Description
Technical field
The utility model relates to electrical technology field, and particularly the experimental provision of electrotechnics training is that a kind of human power generating units reaches the power network training system based on human power generating units concretely.
Background technology
Power network training system is the indispensable important experiment porch of the scientific research of electrical engineering subject, teaching and training unit.It should be able to simulate production, conveying and the process of consumption of electric energy in the electric system; the process such as startup, operation, Failure And Recovery that also can reflect electric system; meet increasingly automated, information-based, the digitized characteristics of present electric system; realize power production process detection, supervision, control, protection, dispatching automation; the student is carried out comprehensive training; become the electrical engineering subject and promote teaching level, promote the synthesis experiment platform of quality-oriented education.
The genset of at present both at home and abroad more typical unit infinity electrical network experiment porch is by the direct current motor more than the 10kW and the synchronous alternating-current generator more than the 10kW is coaxial connects and composes, and the electric power of output is sent into the 400V utility grid (below be also referred to as Infinite bus system) of electric system or the isolated island electric system (referring to not be connected with utility grid) of establishing load certainly here; Control section mainly comprises: direct current motor power unit, speed governing unit, generator protection unit, adjustment of field excitation unit and generator connecting in parallel with system control device etc.Genset can be formed independently generator-400V isolated island electrical network by load system, also can constitute infinitely great electrical network of unit or multimachine electrical network by genset and mains system 400V power supply.The control of genset and operation can manually be finished by routine control separately, also can be finished automatically by computer-controlled functional module or switch.As shown in Figure 1, the function of prior art is as follows:
(1) speed regulating control unit; generally form, realize that unit starts automatically, frequency adjustment, the automatic increasing and decreasing load of synchronous generator, function such as open/shut down automatically by full-control type three-phase intelligent silicon controlled rectifier module (or PWM module), frequency transmitter and single-chip computer control system.
(2) generator unit becomes electric energy with the energy conversion of other form.
(3) generator protection unit adopts the protected location of microcomputer type or analog device to realize protections such as current/voltage.
(4) generator excitation and grid-connection control device comprise that excitation is built to press and being incorporated into the power networks and withdrawing from the operation of the methods of operation such as electrical network of automatic magnetic exciting adjusting and synchronous generator.
(5) electrical network aut.eq. has functions such as circuit microcomputer type electric current, voltage protection and automatic closing.
(6) 400V of system electrical network or establish load isolated island electric system certainly.
The basic function of typical multimachine electrical network experiment porch is similar substantially to one-of-a-kind system, and just the platform number of generator is more, and the forceful electric power network is more complicated.But because cost is too high, common laboratory is the infinitely great electrical network experiment porch of unit.
The shortcoming of above-mentioned test platform is:
(1) required experimental facilities capacity is big, cause the laboratory investment excessive, and floor area is many;
(2) electric pressure height, student's processing safety is poor;
(3) because the cost height is generally set up one-of-a-kind system, can only offer limited experiment content;
(4) because equipment is valuable, consider security problems, generally by experimenter's operation, and the chance that the student takes action on one's own to operate seldom;
(5) the genset method of operation is single, can only move with generation mode, can not move in electronic mode;
(6) place capacity is big, is in operation to consume a large amount of electric energy;
(7) student's the undergo notion of amount of electric energy phenomenon, for example electric power etc. of equipment by experiment.
In addition, because the computing machine develop rapidly, some R﹠D institutions have developed the Digital Simulation electric system, with mathematical model virtual electric power network system, allow the student carry out the analogue simulation operation on computers, this also can play teaching function to a certain degree for the student.For example, Chinese patent application 200310112652.6 discloses three grades of associatings of a kind of area power grid simulation training system, utilizes Computer Simulation to carry out the electrical network training.But such analogue system is not the actual physics electric system, lacks the on-the-spot sense of reality and atmosphere, compares with true electric system, and the functipnal capability training effect is not very good.
People's muscle power also can be used for generating electricity as a kind of energy, and for example Chinese utility model patent 92244873.6 discloses a kind of treadmill that generates electricity.When the people does body building, drive generator by the body-building apparatus motion and can produce electric energy, in body-building, reclaimed the energy that slatterns, have positive effect.Although the power that generator sends is very low, still have the people to advise, promote generating electricity from manpower.We can say that from the angle of economic benefit and social benefit, the generating of the muscle power of simple personnel selection is lost more than gain, and does not have practical significance.And in modernized society, the mode of production of the muscle power of simple personnel selection generating is also too original, and an importance actively utilizing people's muscle power acting is utilize combination, the especially intelligence of its intelligence and muscle power as far as possible.In view of this, if people's physical institute electricity can be connected to the grid, utilize its tap intellectual resources, can also overcome the disadvantage that dc motor speed drive system drives generator, like this, in experiment porch, the student serves as " power source " and " speed regulator " role in the human power generating units, participate in the experimental system operation directly, the student is the undergo notion of amount of electric energy phenomenon of equipment by experiment, for example, the relation between people's strength and the electric power etc., this has very big benefit to the student's correct understanding electric system phenomenon and the knowledge that increases electric power fast.
At present, human-operated electricity generation system mainly is made of body-building apparatus, generator, rectifier, accumulator, inverter etc., because its output power is too little and be single phase poaer supply, owing to do not have grid-connection control device, also there is not the human power generating units of grid type its electricity can be sent into electrical network, therefore, existing at present exercycle Blast Furnace Top Gas Recovery Turbine Unit (TRT) can't be connected to the grid.
The utility model content
In order to overcome the shortcoming and defect of electrical network experiment porch in the prior art, the utility model provides a kind of human power generating units and based on the power network training system of human power generating units, with the human power generating units generating that is connected to the grid, be used to set up and have the environment-friendly and energy-efficient power network training system that the student can flexible operating.
The technical solution of the utility model is: a kind of human power generating units, and described human power generating units comprises: manpower drives and speed regulation unit, is used for output kinetic energy, and movement velocity is regulated; Three phase generator is used for kinetic energy is converted into electric energy; The three phase generator protected location is used for three phase generator is protected; Three phase generator adjustment of field excitation unit is used for the three phase generator excitation is regulated; The three phase generator grid-connection control device, be used for three phase generator and net operation.
The utility model also provides a kind of power network training system, and described system comprises: many human power generating units, electric power networks, a plurality of load, communication network and computer supervisory control systems; Described many human power generating units link with described electric power networks respectively, and described load also links with described electric power networks respectively and is connected; Described computer supervisory control system is connected with described many human power generating units and a plurality of load by communication network; Wherein, human power generating units is used for generating, speed is regulated and to described electric power networks transmission of electric energy; Load is used to receive the electric energy that described electric power networks carries and moves; Described computer supervisory control system is used to be provided with the electrical network training project, and controls and monitor the operation of described many human power generating units and a plurality of load devices.
The utility model is core with the human power generating units, is made up of flexibly equipment such as many human power generating units, switch, transmission line of electricity, customer charge, transformer, relay protection and comprehensive automation devices, can design and carry out various experimental projects.The utility model can reflect the overall process of electrical energy production in the multi-machine power system, conveying, consumption; meet increasingly automated, information-based, the digitized characteristics of present electric system, realized power production process detection, supervision, control, protection, dispatching automation.
The utility model real " people-oriented ", can carry out the experiment of generating plant, operation of power networks and control, can provide a comprehensive real electric power Physical Experiment system to teaching, its experiment content has covered most Specialty Experiments of electrical engineering specialty, satisfy student's teaching and scientific research work, become the synthesis experiment platform that the electrical engineering subject promotes teaching level, cultivation student's practical operative ability and innovation ability, promotion quality-oriented education.By using the utility model, the own contrived experiment project of student's energy on the multi-machine power system teaching experiment platform, is carried out the basic operating technical ability training of electric system.Making can be under the electric system actual environment, cultivate student's experiment manipulative ability, analysis ability, competence in research, by student's operating equipment in person, the contrast of the size of the electric power that undergoes and people's strength, thereby the actual motion to electric system has more deep understanding and understanding, the utility model utilizes people's physical sport to drive synchronously big flywheel, synchronously big flywheel drives synchronous small flywheel by synchrome conveying belt, small flywheel is coaxial with the transmission synchronization wheel synchronously, thereby drive generator by synchrome conveying belt and send power frequency electric power, available like this manpower drives and speed regulation unit replaces traditional direct current motor and speed regulator unit thereof, directly drive and the control generator, produce electric energy and it is sent into electrical network, and then constitute environmental protection, energy-saving power network training system based on human power generating units.
Description of drawings
Fig. 1 is the genset one-of-a-kind system structured flowchart of prior art;
Fig. 2 is a manpower synchronous generator unit one-of-a-kind system structured flowchart of the present utility model;
Fig. 3 is the human power generating units synoptic diagram of the utility model embodiment;
Fig. 4 is a multi-machine power system teaching experiment platform structured flowchart;
Fig. 5 is an AC synchronous human power generating units one-of-a-kind system structured flowchart;
Fig. 6 exchanges low speed human power generating units one-of-a-kind system structured flowchart;
Fig. 7 is a direct current human power generating units one-of-a-kind system structured flowchart;
Fig. 8 is the layered distribution type structure block diagram of computer supervisory control system;
Fig. 9 is the dispatching communications subsystem structured flowchart of the utility model embodiment communication network;
Figure 10 is the multi-machine power system trend experimental circuit schematic diagram of the utility model embodiment;
Figure 11 is the multimachine electric power networks running experiment schematic diagram of the utility model embodiment;
Figure 12 is the grid-connection control device schematic diagram of the utility model embodiment.
Embodiment
Following with reference to description of drawings embodiment of the present utility model.The utility model utilizes people's physical sport to drive traditional direct current motor and the speed regulator unit thereof of human power generating units replacement, drive and the control generator, produce electric energy and it is sent into electrical network, and then constitute environmental protection, energy-saving power network training system based on human power generating units.
As shown in Figure 2, the utility model system comprises:
(1) manpower drives and speed adjusting device, manpower drives and rotor kinetic energy realization unit starts automatically by manpower is converted in the speed regulating control unit, frequency adjustment, the automatic increasing and decreasing load of synchronous generator, open automatically, function such as shutdown.
(2) kinetic energy is exported car, manpower is become the kinetic energy of motion.
(3) generator unit, the energy conversion that the people is moved becomes electric energy.
(4) generator protection unit adopts the Microcomputer Protection unit to realize current protection, also can realize relay characteristic adjustment and simulated action behavioral experiment separately.
(5) generator excitation and grid-connection control device comprise that excitation is built to press and being incorporated into the power networks and withdrawing from the operation of operation of power networks of automatic magnetic exciting adjusting and synchronous generator.
(6) electrical network aut.eq. has circuit microcomputer type electric current, voltage protection and automatic switching-in function.
(7) load, Infinite bus system 400V electrical network or the isolated island electric system of establishing load certainly.
As shown in Figure 3, the manpower of the utility model system drives and the each several part of speed regulation unit comprises: ground 1, system's ground support 2, pedal 3, synchrome conveying belt 4, synchronously big flywheel 5, solid frame 6, seat 7, accumulated energy flywheel 8, handle-bar grip 9, synchronously small flywheel axle 10, braking tile 11, brake bar 12, braking release handle 13, synchronously big flywheel shaft 14, synchronously small flywheel 15, transmission synchronization take turns 16, generator 17, generator shaft 18, generator shaft synchronizing wheel 19, generator terminal box 20 and synchrome conveying belt 21.
The synchronous speed regulating system mainly is made up of synchronously big flywheel 5, synchrome conveying belt 4, synchronous small flywheel 15, transmission synchronization wheel 16, synchrome conveying belt 21 and generator shaft synchronizing wheel 19 etc., when human body is firmly pedaled pedal 3 with certain speed, the suitable gear of design synchronizing wheel and synchrome conveying belt makes the generating function rotate with synchronous speed, and then the electric power of generation synchronizing frequency, draw by generator terminal box 20, be sent to power system network or isolated island system through transformer.
The effect of accumulated energy flywheel 8: can the store mechanical energy, make the rotating speed of motion steady, when as generator, carry out energy storage by manpower; When as motor, it is carried out energy storage by electric system.
Brake system is made of braking tile 11, brake bar 12 and braking release handle 13, can brake adjusting according to system's operation needs.
By design synchronously big flywheel 5, synchronously the number of teeth of small flywheel 15, transmission synchronization wheel 16, generator shaft synchronizing wheel 19, synchrome conveying belt 4, synchrome conveying belt 21 and radius corresponding (concrete data are not unique, so do not provide here), make common people when normally firmly generating electricity, making the generating function reach 3000 changes, thereby can send power frequency electric power.
As shown in Figure 8, computer supervisory control system adopts computing machine to realize, system scale is according to embodiment Figure 11 design, and computer supervisory control system adopts layered distribution type structure.This layered distribution type structure applicable industry field bus communication technology integrates measurement, protection, control, communication, manages, and can realize human power generating units comprehensive automation management.Supervisory system mainly is made up of three parts:
(1) work as the stratum, when the stratum mainly by measure, protect, control, be incorporated into the power networks, functional module such as excitation constitutes, and can information be passed to the concentrated controling management layer by CAN industrial field bus (or other industrial field bus) communication interface of standard.Its function mainly comprises: to the data-switching value of human power generating units operation and the collection of analog quantity; The start of genset and shutdown control; The control of human power generating units speed governing; The control of human power generating units excitation and adjusting; The foundation of human power generating units operation real time data; Human power generating units fault distinguishing and warning; Connect with Ethernet by the concentrated controling management layer, can be in the background data base of server with the information stores that collects when the stratum.
(2) concentrated controling management layer, control and measurement mechanism information that the concentrated controling management layer of each human power generating units will be worked as the stratum by industrial field bus are collected, it is sent to the host computer of dispatching communications subsystem Master Control Room, realize functions such as the uploading of unit information, Long-distance Control and device setting valve.
(3) master control administration and supervision authorities, its task are that the information that is stored in background data base is sent out broadcasting on Ethernet, comprise that all PCs at station on duty can both be received, for the operation of human power generating units self-organizing system provides information.Can also can be implemented in the operation of power networks situation that monitors on the internet based on human power generating units by the TCPPIP agreement for network provides WEB service.
Computer supervisory control system has software management system, and layered distribution type structure is adopted in monitoring management.Adopt CAN bus (or other industrial bus) communication network structure between host computer and the local monitoring system unit, and link by the corresponding local monitoring system unit of communication network and each genset and switchyard, can be by LAN (Local Area Network) and remote dispatching communication.The monitoring management system host computer adopts the industrial control computer of strong interference immunity, the monitoring system unit, locality of each genset adopts the microcomputer excitation system with monitoring function that the generator unit is finished local monitoring, the electric quantity monitoring of each switchyard adopts the intelligence instrument with data processing function that circuit, load are finished local monitoring, and each switch is monitored and Load Regulation by the PLC of high reliability, and has the overload-alarm function, realize the functions such as " four is distant " of Automation of Electric Systems, that is:
The A remote measurement: measure 3 phase currents of every generator frequency, generator unit stator electric current, voltage, active power, reactive power, exciter current of generator, generator excitation voltage and every transmission line of electricity and load, mutually/electric weight such as line voltage, zero-sequence current/voltage, meritorious/idle/applied power, power factor, frequency.
The B remote signalling: the status signal monitoring has the field switch state of generator, generator synchronous on off state, transmission line of electricity on off state, connecting transformer on off state, on-load switch state.
C remote control: the breaker tripping and closing of control transmission line of electricity switch, the breaker tripping and closing of interconnection switch, the breaker tripping and closing of on-load switch and cutter, cutting load control.
The D remote regulating: the voltage of regulator generator before not being incorporated into the power networks, adjusting can online at any time regulator generator excitation controlled variable after being incorporated into the power networks.
What the structure of system adopted is three genset, can also extend further to many genset, does not all influence the total system operation, has favorable expansibility.
Each local monitoring system unit (LCU) is microsystem, and independent face is implemented local monitoring to monitored object, when host computer or a LCU break down, does not influence the normal operation of other LCU.
Intelligence instrument has the standard communication interface of exploitation, can insert fieldbus networks easily, and therefore, systemic-function expands will be easily.
Described computer supervisory control system comprises: electric system start-up course test unit is used for the setting and the control of described electric system start-up course; Electric system normal course of operation test unit is used for the setting and the control of described electric system normal course of operation; Electric power system fault and rejuvenation test unit are used for the setting and the control of described electric power system fault and rejuvenation; The interconnected test unit of electric power networks is used for interconnected setting of described electric power networks and control; Multimachine electric power networks trend distribution test unit is used for setting and control that described multimachine electric power networks trend distributes; The power generation test unit, this power generation test unit further comprises: generating plant complex automatic system experiment module; Excitation Controller for Synchronous Generator design and control experiment module; Automatic and manual paired running operation of synchronous generator and operation characteristic experiment module; Synchronous generator removal of load experiment module; Genset is controlled and the Long-distance Control experiment module on the spot; Generator brake resistance experiment module; Automatic frequency adjustment system experimentation module; Electric system load angle characteristic and power limit experiment module; The merit angle of generator and systematic steady state and transient state operational factor visualized experiment module; The transmission of electricity test unit, this transmission of electricity test unit further comprises: the microcomputer type syllogic current protection experiment module of adjusting; Microcomputer three-phase reclosing experiment module; System's minimax normal operating mode experiment module; Transmission line of electricity series compensation experiment module; Transmission line of electricity all kinds Test to Failure, fault distinguishing and warning experiment module; The power transformation test unit, this power transformation test unit further comprises: the reactive-load compensation experiment module; Experiment module is carried in the low frequency Reduction of Students' Study Load; The electricity consumption test unit, this electricity consumption test unit further comprises: the DC motor speed-regulating experiment module; The ac motor speed control by variable frequency experiment module; The reactive-load compensation experiment module; Harmonic wave and filtration module; Motor protection module or the like.
The fundamental test that the utility model can be carried out is as follows:
(1) whole electric system
1) start-up course of whole electric system;
2) normal course of operation of whole electric system;
3) the Failure And Recovery process of whole electric system;
4) network interconnection experiment;
5) multimachine power network trend distribution test.
(2) power generation part
1) generating plant complex automatic system experiment;
2) Excitation Controller for Synchronous Generator design and control experiment;
3) automatic and manual paired running operation of synchronous generator and operation characteristic thereof;
4) synchronous generator removal of load experiment;
5) local control of unit and Long-distance Control;
6) synchrodyne braking resistance experiment;
7) automatic frequency adjustment system experimentation;
9) electric system load angle characteristic and power limit experiment;
10) the merit angle of generator and systematic steady state and transient state operational factor are visual.
(3) transmission of electricity part
1) the microcomputer type syllogic current protection experiment of adjusting;
2) microcomputer three-phase reclosing experiment;
3) system's minimax normal operating mode experiment;
4) transmission line of electricity series compensation experiment;
5) transmission line of electricity all kinds Test to Failure, fault distinguishing and warning.
(4) power transformation part
1) reactive-load compensation experiment;
2) experiment is carried in the low frequency Reduction of Students' Study Load.
(5) electricity consumption part
1) DC motor speed-regulating experiment;
2) ac motor speed control by variable frequency experiment;
3) reactive-load compensation experiment;
4) harmonic wave and filtering;
5) motor protection.
One-of-a-kind system embodiment (embodiment one) based on human power generating units:
The synchronous human power generating units of AC power frequency of the present utility model can be used for simulating the genset of power plant; human power generating units is driven by manpower and speed adjusting, synchronous alternating-current generator, generator protection unit, generator excitation regulate and the generator connecting in parallel with system control device is formed; one machine infinity bus system that is constituted or isolated island system are made up of equipment such as human power generating units, gate out switch, 100V/400V transformer, electrical network aut.eq., concentrated controling management unit as shown in Figure 2.Synchronous alternating-current generator also can adopt permagnetic synchronous motor or, the composite excitation permanent magnet motor.Wherein, manpower driving and speed are regulated as shown in Figure 3.Wherein: human power generating units both can be incorporated into the power networks also can islet operation, for the grid type unit, its startup, be incorporated into the power networks and operation logic and process as follows:
1) set-up procedure
The working power (not drawing among the figure) of AC synchronous human power generating units is put into operation, gate out switch is disconnected, the system side of gate out switch is inserted infinitely great power-supply system or isolated island electric system.
2) start-up course
When (1) student rides on the seat 7 of kinetic energy output car, apply the effect of power with 3 pairs of kinetic energy output of pedal pedal car, make flywheel 5 rotations greatly synchronously,, can drive small flywheels 15 by synchrome conveying belt 4 like this because synchronously big flywheel 5 and synchronous small flywheel 15 connect together by synchrome conveying belt 4;
(2), and then the kinetic energy of manpower can be stored in the accumulated energy flywheel 8 by synchrome conveying belt 4 owing to accumulated energy flywheel 8, transmission synchronization flywheel 16 and synchronous small flywheel 15 are installed on the synchronous small flywheel axle 10;
(3), can drive generator shaft 18 by synchrome conveying belt 21 like this because transmission synchronization flywheel 16 and generator flywheel 19 connect together by synchrome conveying belt 21;
(4) when the moment that produces by pedal 3 greater than the unloaded moment of generator 17 or when the moment of carrying is arranged, alternative electric generation arbor 18 will rotate, like this, synchronous alternating-current generator (also can adopt permagnetic synchronous motor, composite excitation permanent magnet motor) will send alternating current, its power frequency three-phase supply is drawn from generator terminal box 20, supplies with load or sends into electrical network;
(5) constitute brake system by braking tile 11, brake bar 12 and braking adjusting handle 13, can brake adjusting according to system's operation needs.
3) and network process
Human power generating units for Fig. 5 type adopts the rotating light method.
Be the rotating light method elementary diagram of the three-phase grid control device of three-phase human power generating units as shown in figure 12, La, Lb, Lc are incandescent lamps, BS is the switch (being in the state of disconnection before being incorporated into the power networks) that is incorporated into the power networks, V, H, S are respectively voltage deviation table, frequency departure table and phase deviation table, in the dotted line wire frame is grid-connection control device, and network process is as follows:
(1) observes La, Lb, three groups of incandescent lamps of Lc,, represent that then generator is identical with the electrical network phase sequence if flicker the formation rotating light successively; If three groups of lamps are bright simultaneously or go out, represent that then generator is different with the electrical network phase sequence, should change phase sequence.
(2) when generator is identical with the network phase sequence, regulator generator voltage and generator speed, it is shinny that each phase light is slowly rotated in turn, if voltage deviation Table V, frequency departure table H and phase deviation table S reading approach zero, treat the A phase incandescent lamp switch BS that is incorporated into the power networks that closes when extinguishing, be incorporated into the power networks successfully.
4) operational process
When the student firmly drove pedal, human power generating units was in generating state, and sent to electric system; When the student stopped firmly driving rickshaw, human power generating units was in electric motor state, and system powers to human power generating units, made 8 rotations of motor drives accumulated energy flywheel, and electric energy is become mechanical energy.
Multi-computer system embodiment (embodiment two) based on human power generating units:
Constitute based on the electric power networks experiment porch of human power generating units four subsystems such as multimachine electric power networks, communications network system, computer supervisory control system software management system and local facilities monitoring unit by flexibility and changeability.The electric system teaching experiment platform is made up of N platform human power generating units, electric power networks and n load.Should, such platform is similar substantially with practical power systems, can carry out the experiment of various types of units and multi-machine power system, man-power generator configuration set of the present utility model is fairly perfect, basic electric power networks configuration just can be offered aforesaid electric system experimental project, carry out abundanter experimental project as need, only need the configuration electric power networks to get final product.
Figure 11 provides a typical multimachine electric power networks experimental system, by generating plant (G1 in 1～4 human power generating units simulation practical power systems, G2, G3, G4), article 5, the transmission line of electricity (L15 of different length, L26, L36, L57, L67), 3 generators are respectively with the 1 group of local load of pure resistance (or other type) (LD1 with the incandescent lamp simulation, LD2, LD3), 1 group of induction-motor load (LD6) of the changed watt level of load center, 2 bus connection switch (S1, S2), 7 bus (B1, B2, B3, B4, B5, B6, B7), (B1 has switch S 11 at 7 bus-tie circuit breaker stations, S12, S13, S1; B2 has switch S 21, S22, S23; B3 has switch S 31, S32, S33; B4 has switch S 41, S42; B5 has switch S 51, S52, S2; B6 has switch S 61, S62, S63, S64; B7 has switch S 71, S72, S73) and composition such as transformer T.
G1, G2 and G3 simulate corresponding generating plant (can further expand as required) respectively, two genset of G1 and G2 are connected to power network bus B1 respectively and B2 sends into infinitely great electrical network with institute's electricity through two electric wires that feed back, and the G3 genset is connected to circuit through-station bus B6 institute's electricity is sent into infinitely great electrical network;
Simulate infinitely great power supply unit G4 and then be connected on the bus B7 through transformer T by civil power 380V, locality load LD1, LD2, LD3 and the LD6 of 4 groups of different sizes are attached to respectively on bus B1, B2, B3 and the B6 bus, and wherein the power factor of one group of load LD6 is variable; Bus B5 and B6 are circuit through-station bus, G1, G2 and G3 unit can carry out generator neatly and the motor method of operation changes, thereby the system load flow distributed data that can obtain to enrich, the line connection of whole strong power system can pass through line switching (S11, S12, S13, S21, S22, S23, S31, S32, S33, S41, S42, S51, S52, S61, S62, S71, S72, S73) and circuit interconnection switch (S1, S2) changes flexibly, form the power system network of a flexibility and changeability, be convenient to Theoretical Calculation and experimental analysis.
The major network electric pressure is 100V (or other electric pressure), and the peak power of every genset is 500W, and infinitely great power supply short circuit capacity is 10MVA.
On this network foundation, can design various experiments.Be exemplified below:
1, the foundation of electrical network
(1) gives all switch control power supply power supplies, generator contactor S11, S21, S31, S41 and on-load switch S13, S23, S33, S63 are disconnected, then by multimachine electric power networks wiring diagram wiring shown in Figure 11;
(2) S41 that closes a switch, voltage transformer system side line voltage is 380V, the line voltage of present networks side bus B1-B7 is 100V;
(3) starter-generator group G1, after the success of being incorporated into the power networks, S11 is closed, and can see that present networks carries electric power to system this moment from the measurement instrument of the interconnection switch S42 between present networks and the system; If local on-load switch S13 is closed, if the power-balance that load LD1 and G1 send, then the conveying electric power that shows on the measurement instrument of interconnection switch S42 is zero (annotate: the measurement instrument of S42 configuration can be measured electric current, voltage, active power and reactive power);
(4) in like manner, genset G2 and G3 are connected to the grid, and all loads are put into operation, regulate the power that each generator sends, the conveying electric power size that shows on the measurement instrument by interconnection switch S42 is the equilibrium state of network generating and power supply as can be seen; After network is set up, just can change the trend distribution of present networks by various control devices.
2, change the experiment that trend distributes
(1) genset G1, G2 link, and have local load, by two times long distance line L15 and L26 power are sent into Infinite bus system, also bus connection switch S1 and S2 can be disconnected transmission power respectively;
(2) link at the bus B5 of through-station and B6 via line L36 and bus B3, genset G3 the light hours to system's transmission power, and when heavy load from system's absorbed power, thereby change direction of tide;
(3) this power network is to have a plurality of nodes, T type electric power networks that have through-station, double loop, by the switching circuit, can change the mode of connection neatly, as disconnect interconnection switch S1 and S2, power network has then become a radial network of multimachine, and genset G1 and transmission line of electricity thereof have constituted one machine infinity bus system;
(4) if close interconnection switch S1, disconnect interconnection switch S2, power network has then become a multimachine loop network;
(5) do not changing under the network main structure prerequisite, generator is meritorious by changing respectively, the idle distribution that changes trend;
(6) can also the two-circuit line can be changed into single-circuit line and transport the distribution that changes the power network trend by the distribution of throwing, cutting load changes the power network trend;
(7),, change the distribution of power network trend as generating and electronic mode by changing the method for operation of every genset.
3, analysis of Short Circuit Fault
Under different network structure prerequisites; do short-circuit test at the L15 circuit; can carry out the calculation of fault analysis; the switch S 12 at its circuit two ends and S51 meeting would trip (the protection trip time can adjust) when circuit L15 fault also can be done similar short-circuit test at other circuit except that L15 at this moment.
4, islet operation
When the bus B5 of middle liaison station breaks down, and switch S 2 is when malfunctioning, and present networks two isolated island systems will occur with respect to infinitely great power-supply system, and promptly genset G1 and G2 and adjacent lines thereof form first isolated island system; Genset G3 and adjacent lines form second isolated island; After the fault isolation maintenance, recover original system by working specification.
Embodiment three
The strong power system of electric system teaching experiment platform is made up of N platform human power generating units, electric power networks and n load as shown in Figure 4.Electric system teaching experiment platform dispatching communications subsystem as shown in Figure 9, such platform is similar substantially with practical power systems, can carry out the experiment of various types of units and multi-machine power system, man-power generator configuration set of the present utility model is fairly perfect, basic electric power networks configuration just can be offered following electric system experimental project, carry out abundanter experimental project as need, only need the configuration electric power networks to get final product.
Computer monitoring adopts layered distribution type structure, and this structure applications Industrial Ethernet network and the industrial field bus communication technology integrate measurement, protection, control, communication, manage, and can realize human power generating units comprehensive automation management.Supervisory system mainly is made up of three parts:
(1) terrain layer.The terrain layer mainly by measure, protect, control, be incorporated into the power networks, functional module such as excitation constitutes, RS232 that can be by standard, 485 or CAN industrial field bus communication interface information is passed to the concentrated controling management layer.Its function mainly comprises: to the data-switching value of human power generating units operation and the collection of analog quantity; The start of genset and shutdown control; The control of human power generating units speed governing; The control of human power generating units excitation and adjusting; The foundation of human power generating units operation real time data; Human power generating units fault distinguishing and warning; Connect with Ethernet by the concentrated controling management layer, the information stores that the terrain layer can be collected is in the background data base of server.
(2) concentrated controling management layer (human power generating units).The concentrated controling management layer of each human power generating units is collected the control and the measurement mechanism information of terrain layer by industrial field bus, it is sent to the host computer of dispatching communications subsystem Master Control Room, and adopt the communication interface stipulations of power industry standard, realize functions such as the uploading of unit information, Long-distance Control and device setting valve.
(3) master control administration and supervision authorities (dispatching communications subsystem).Its task is that the information that is stored in background data base is sent out broadcasting on Ethernet, comprises that all PCs at station on duty can both be received, for the operation of human power generating units self-organizing system provides information.Can also can be implemented in the ruuning situation that monitors human power generating units on the internet by the TCPPIP agreement for network provides WEB service.
Designed human power generating units has three types: AC synchronous human power generating units, interchange low speed human power generating units and direct current human power generating units, and the AC synchronous human power generating units can be used for the Turbo-generator Set that simulated fire power plant can directly send the synchronizing frequency power supply; Exchange the low speed human power generating units and can be used for simulating the genset that wind-force etc. directly sends the new forms of energy type of asynchronous frequency power supply; The direct current human power generating units can be used for the genset that analog solar etc. can directly send the new forms of energy type of direct supply.Every kind of human power generating units both can be incorporated into the power networks and also can break away from operation of power networks, for its startup of grid type unit, be incorporated into the power networks and operational process as follows:
AC synchronous human power generating units (referring to Fig. 5):
The AC synchronous human power generating units can be used for the Turbo-generator Set that simulated fire power plant can directly send the synchronizing frequency power supply; strong power part is made up of institutes such as student, kinetic energy output car, speed change gear, three-phase synchronous AC generator (adopting permagnetic synchronous motor or hybrid exciting synchronous motor), observing and controlling, protection, grid-connecting apparatus, three-phase gate out switch, three-phase transformer, working power and concentrated controling management layer computing machines as shown in Figure 5.
Start, be incorporated into the power networks and operational process is seen aforesaid one-of-a-kind system embodiment based on human power generating units (embodiment one).
Exchange low speed human power generating units (referring to Fig. 6):
Can be used for simulating the genset that wind-force etc. directly sends the new forms of energy type of asynchronous frequency power supply; strong power part is made up of student, kinetic energy output car, three-phase synchronous AC generator (also can adopt permagnetic synchronous motor, composite excitation permanent magnet motor or asynchronous machine), three phase rectifier and institutes such as wave filter, three-phase inverter, observing and controlling, protection, grid-connecting apparatus, three-phase gate out switch, working power and concentrated controling management layer computing machine as shown in Figure 6.
Start, be incorporated into the power networks and operational process:
1, set-up procedure: the working power that will exchange the synchronous human power generating units of low speed puts into operation, and gate out switch is closed, and the gate out switch opposite side is inserted infinitely great power-supply system or isolated island electric system;
2, start-up course: the student exports car with pin or hand-drive kinetic energy, kinetic energy output car drives and exchanges the rotation of low speed synchronous generator, thereby produce the asynchronous frequency alternating current of three-phase, become the synchronizing frequency alternating current by three phase rectifier filtering and inversion, concentrated controling management layer computing machine obtains the start-up course parameter by observing and controlling and protective device, finishes start-up course when set end voltage and frequency thereof reach ratings;
3, auto-parallel: three-phase grid type inverter, according to the frequency of switching system side power supply, carry out the inversion conversion automatically, direct current is converted to the electrical network same frequency, sends into system with voltage and synchronous electric power;
4, operational process: when the student firmly drives kinetic energy output car, exchange the synchronous human power generating units of low speed and be in generating state, and send to electric system; When the student stopped firmly driving rickshaw, human power generating units stopped to power system power supply.
Direct current human power generating units (referring to Fig. 7):
Can be used for the genset that analog solar etc. can directly send the new forms of energy type of direct supply; strong power part is made up of institutes such as student, kinetic energy output car, Dyn., wave filter, three-phase inverter, observing and controlling, protection, grid-connecting apparatus, three-phase gate out switch, working power and concentrated controling management layer computing machines as shown in Figure 7.
Start, be incorporated into the power networks and see the above-mentioned low speed human power generating units (embodiment three) that exchanges with operational process.
Embodiment four
Figure 10 is the embodiment of the utility model multi-machine power system trend experiment, and multi-machine power system is by human power generating units 1011, human power generating units 1021, human power generating units 1031, bus 1012, bus 1022, bus 1032, local load (150 watts) 1014, local load (150 watts) 1024, local load (150 watts) 1034, local on-load switch 1013, local on-load switch 1023, local on-load switch 1033, infinitely great unit (electricity network) 1041, system busbar 1042, system loading (300 watts) 1044, system loading switch 1043, long distance power transmission line and measurement instrument 1015 thereof, long distance power transmission line and measurement instrument 1025 thereof, long distance power transmission line and measurement instrument 1035 thereof, system and infinitely great tie feeder and measurement instrument 1045 thereof, infinitely great power switch 1046 formations such as grade.
Experimentation is as follows:
1, with unloaded network insertion electrical network.Bus 1012, bus 1022, bus 1032, system busbar 42, long distance power transmission line and measurement instrument 1015 thereof, long distance power transmission line and measurement instrument 1025 thereof, long distance power transmission line and measurement instrument 1035 thereof, system and infinitely great tie feeder and measurement instrument 1045 thereof are coupled together, infinitely great power switch 1046 closes, like this, with network and infinitely great power connection.Because network zero load, measurement instrument 1015, measurement instrument 1025, measurement instrument 1035, measurement instrument 1045 all do not have the power indication.
2, the system loading switch 1043 that closes, measurement instrument 1045 have 300 watts power to show.
3, first student will be connected to the grid after human power generating units 1011 startups according to the startup requirement of human power generating units, and control makes its power that sends 150 watts, measurement instrument 1045 have 150 watts power to show, measurement instrument 1015 has 150 watts power to show.
The local on-load switch 1013 that closes, local load (150 watts) 1014 are powered, and measurement instrument 1045 recovers 300 watts power and shows that the power of measurement instrument 1015 is shown as zero.
4, second student be according to the startup requirement of human power generating units, be connected to the grid after will human power generating units 1022 starting, and control makes its power that sends 150 watts, measurement instrument 1045 have 150 watts power to show, measurement instrument 1025 has 150 watts power to show.
The local on-load switch 1023 that closes, local load (150 watts) 1024 are powered, and measurement instrument 1045 recovers 300 watts power and shows that the power of measurement instrument 1025 is shown as zero.
5, the 3rd student be according to the startup requirement of human power generating units, be connected to the grid after will human power generating units 1032 starting, and control makes its power that sends 150 watts, measurement instrument 1045 have 150 watts power to show, measurement instrument 1025 has 150 watts power to show.
The local on-load switch 1033 that closes, local load (150 watts) 1034 are powered, and measurement instrument 1045 recovers 300 watts power and shows that the power of measurement instrument 1035 is shown as zero.
6, for example, first student stops to drive its human power generating units, and this human power generating units has just become motor (supposing to drive 150 watts of loads), and each road instrument has different demonstrations.
If 7 disconnect local on-load switch 1013, local on-load switch 1023, local on-load switch 1033, system loading switch 1043, measurement instrument 1015, measurement instrument 1025, measurement instrument 1035 all show 150 watts generated output so, and measurement instrument 1045 demonstrations are sent 450 watts generated output to infinitely great power-supply system
8, change the power that arbitrary generator sends, or change the size of arbitrary load, or change the structure of network, can obtain different trends and distribute.Can obtain extremely abundant experiment content.
Hardware system: the electric current of every generator, voltage all leave standard interface, and the genset Regulation Control is also left interface, and the jumping of each switch, close control interface and all guide to terminal row, use for the experimental study personnel.
The utility model is core with the human power generating units, is made up of flexibly equipment such as many human power generating units, switch, transmission line of electricity, customer charge, transformer, relay protection and comprehensive automation devices, can design and carry out various experimental projects.The utility model can reflect the overall process of electrical energy production in the multi-machine power system, conveying, consumption; meet increasingly automated, information-based, the digitized characteristics of present electric system, realized power production process detection, supervision, control, protection, dispatching automation.
Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model.
Claims (10)
1. a human power generating units is characterized in that, described human power generating units comprises:
Manpower drives and speed regulation unit, is used for output kinetic energy, and movement velocity is regulated;
Three phase generator is used for kinetic energy is converted into electric energy;
The three phase generator protected location is used for three phase generator is protected;
Three phase generator adjustment of field excitation unit is used for the three phase generator excitation is regulated;
The three phase generator grid-connection control device, be used for three phase generator and net operation.
2. human power generating units according to claim 1 is characterized in that, described manpower drives and speed regulation unit comprises:
Kinetic energy is exported car, and this kinetic energy output car comprises pedal (3), synchrome conveying belt (4), synchronously big flywheel (5), solid frame (6), seat (7), accumulated energy flywheel (8), handle-bar grip (9), synchronous small flywheel axle (10), braking tile (11), brake bar (12), braking release handle (13), synchronously big flywheel shaft (14), synchronous small flywheel (15), transmission synchronization wheel (16); Described synchrome conveying belt (4) is connected synchronous small flywheel axle (10) with synchronously big flywheel shaft (14);
Support (2) is used to support described kinetic energy output car.
3. human power generating units according to claim 2 is characterized in that, described manpower drives and speed regulation unit comprises:
Kinetic energy is exported car, and this kinetic energy output car comprises pedal (3), synchrome conveying belt (4), synchronously big flywheel (5), solid frame (6), seat (7), accumulated energy flywheel (8), handle-bar grip (9), synchronous small flywheel axle (10), braking tile (11), brake bar (12), braking release handle (13), synchronously big flywheel shaft (14), synchronous small flywheel (15), transmission synchronization wheel (16); Described synchrome conveying belt (4) is connected synchronous small flywheel axle (10) with synchronously big flywheel shaft (14);
Support (2) is used to support described kinetic energy output car.
4. human power generating units according to claim 3 is characterized in that, described three phase generator is a synchronous alternating-current generator, and this synchronous alternating-current generator comprises:
Generator shaft (18), generator shaft synchronizing wheel (19), generator terminal box (20), synchrome conveying belt (21); Described synchrome conveying belt (21) is connected described generator shaft synchronizing wheel (19) with transmission synchronization wheel (16);
Described support (2) is used to support described kinetic energy output car and synchronous alternating-current generator.
5. according to claim 3 or 4 described human power generating units, it is characterized in that described synchrome conveying belt comprises: chain, travelling belt or gear.
6. a power network training system is characterized in that, described system comprises: many human power generating units, electric power networks, a plurality of load, communication network and computer monitoring devices; Described many human power generating units link with described electric power networks respectively, and described load also links with described electric power networks respectively and is connected; Described computer monitoring device is connected with described many human power generating units and a plurality of load by communication network; Wherein,
Human power generating units is used for generating, speed is regulated and to described electric power networks transmission of electric energy;
Load is used to receive the electric energy that described electric power networks carries and moves;
Described computer monitoring device is used to be provided with the electrical network training project, and controls and monitor the operation of described many human power generating units and a plurality of load devices.
7. power network training system according to claim 6 is characterized in that, described human power generating units comprises:
Manpower drives and speed regulation unit, is used for output kinetic energy, and movement velocity is regulated;
Three phase generator is used for kinetic energy is converted into electric energy;
The three phase generator protected location is used for three phase generator is protected;
Three phase generator adjustment of field excitation unit is used for the three phase generator excitation is regulated;
The three phase generator grid-connection control device, be used for three phase generator and net operation.
8. power network training system according to claim 7 is characterized in that, described system also comprises: a plurality of gates out switch and a plurality of transformer; Described human power generating units is connected with described electric power networks with transformer by the gate out switch of correspondence.
9. power network training system according to claim 6 is characterized in that, described a plurality of loads comprise: 400V electrical network or establish the isolated island power network of load certainly.
10. power network training system according to claim 6, it is characterized in that, described system also comprises: the electrical network aut.eq., be used to accept the control of described computer supervisory control system, and described a plurality of loads are carried out circuit microcomputer type electric current, voltage protection and automatic closing;
Described computer monitoring device comprises:
Electric system start-up course test unit is used for the setting and the control of described electric system start-up course;
Electric system normal course of operation test unit is used for the setting and the control of described electric system normal course of operation;
Electric power system fault and rejuvenation test unit are used for the setting and the control of described electric power system fault and rejuvenation;
The interconnected test unit of electric power networks is used for interconnected setting of described electric power networks and control;
Multimachine electric power networks trend distribution test unit is used for setting and control that described multimachine electric power networks trend distributes;
The power generation test unit, this power generation test unit further comprises: generating plant complex automatic system experiment module; Excitation Controller for Synchronous Generator design and control experiment module; Automatic and manual paired running operation of synchronous generator and operation characteristic experiment module; Synchronous generator removal of load experiment module; Genset is controlled and the Long-distance Control experiment module on the spot; Generator brake resistance experiment module; Automatic frequency adjustment system experimentation module; Electric system load angle characteristic and power limit experiment module; The merit angle of generator and systematic steady state and transient state operational factor visualized experiment module;
The transmission of electricity test unit, this transmission of electricity test unit further comprises: the microcomputer type syllogic current protection experiment module of adjusting; Microcomputer three-phase reclosing experiment module; System's minimax normal operating mode experiment module; Transmission line of electricity series compensation experiment module; Transmission line of electricity all kinds Test to Failure, fault distinguishing and warning experiment module;
The power transformation test unit, this power transformation test unit further comprises: the reactive-load compensation experiment module; Experiment module is carried in the low frequency Reduction of Students' Study Load;
The electricity consumption test unit, this electricity consumption test unit further comprises: the DC motor speed-regulating experiment module; The ac motor speed control by variable frequency experiment module; The reactive-load compensation experiment module; Harmonic wave and filtration module; The motor protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720103473XU CN201000696Y (en) | 2007-02-06 | 2007-02-06 | Manpower generator unit and electricity network training system based on the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720103473XU CN201000696Y (en) | 2007-02-06 | 2007-02-06 | Manpower generator unit and electricity network training system based on the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000696Y true CN201000696Y (en) | 2008-01-02 |
Family
ID=39015100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720103473XU Expired - Fee Related CN201000696Y (en) | 2007-02-06 | 2007-02-06 | Manpower generator unit and electricity network training system based on the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201000696Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242761A (en) * | 2014-07-31 | 2014-12-24 | 阳江核电有限公司 | Excitation adjustment system and method for nuclear power station generator |
| CN109859583A (en) * | 2019-01-07 | 2019-06-07 | 绥化学院 | A kind of electric integrated simulation and demo system |
-
2007
- 2007-02-06 CN CNU200720103473XU patent/CN201000696Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242761A (en) * | 2014-07-31 | 2014-12-24 | 阳江核电有限公司 | Excitation adjustment system and method for nuclear power station generator |
| CN109859583A (en) * | 2019-01-07 | 2019-06-07 | 绥化学院 | A kind of electric integrated simulation and demo system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102169342B (en) | Distribution network coordination control system and control method taking account of distributed power | |
| CN105024397B (en) | Dynamic simulator system of the offshore wind farm through VSC MTDC transmission of electricity grid-connected systems | |
| CN202134144U (en) | High voltage power distribution completely real load control training assessment system | |
| CN107947227A (en) | Direction control device, photovoltaic power generation equipment, micro-grid system and control method | |
| CN104934972B (en) | Power Exchange node and medium voltage distribution network active power flowcontrol power network and control method | |
| CN100568319C (en) | A kind of power network training system based on human power generating units | |
| CN107785931A (en) | A kind of small-sized electric energy management is with coordinating control integrated apparatus | |
| CN106505605A (en) | Sodium-sulphur battery power station energy storage subsystem | |
| CN102710023A (en) | Monitoring system applicable to different types of wind photovoltaic storage microgrid systems | |
| CN108279350B (en) | Simulation test system for urban rail transit traction power supply moving die | |
| CN108550305A (en) | Distributed new O＆M simulation training system | |
| CN107834606A (en) | Light stores up bavin micro-capacitance sensor electric power system and its control method | |
| CN106549503A (en) | Sodium-sulphur battery Power Station Monitored Control System | |
| CN106527182A (en) | Power grid stability test system containing multiple types of high-penetration new energy based on RTDS and method thereof | |
| CN108075489A (en) | A kind of movable type micro-grid system | |
| CN104835077A (en) | Static safety analysis system with dispatcher accident prediction supporting function | |
| CN108306338B (en) | A kind of modular microfluidic power grid and its a few days ago method of energy-optimised scheduling | |
| CN104835078A (en) | Power flow determining method in static safety analysis system in view of operation of automatic switching device of standby power supply | |
| CN109687503A (en) | The isolated network ferroelectric power supply system and method for supplying power to provided multiple forms of energy to complement each other based on battery energy storage | |
| CN201000696Y (en) | Manpower generator unit and electricity network training system based on the same | |
| CN106847019A (en) | A kind of micro-capacitance sensor Dispatching monitor and control system and control method | |
| CN107453414A (en) | A kind of portable micro-grid system | |
| CN103904684A (en) | Micro-grid control system and a new energy recycling system | |
| CN206558029U (en) | A kind of dispatcher training system system | |
| CN108648580A (en) | Distributed photovoltaic power generation O＆M simulation training system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080102 |