CN201639308U - Elastic energy storage generation system for power grid - Google Patents
Elastic energy storage generation system for power grid Download PDFInfo
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- CN201639308U CN201639308U CN2010201269830U CN201020126983U CN201639308U CN 201639308 U CN201639308 U CN 201639308U CN 2010201269830 U CN2010201269830 U CN 2010201269830U CN 201020126983 U CN201020126983 U CN 201020126983U CN 201639308 U CN201639308 U CN 201639308U
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Abstract
An elastic energy storage generation system for a power grid is used for resolving problems of peak regulation of the power grid. The technical scheme includes that the elastic energy storage generation system consists of a central monitor and a plurality of system units, each system unit consists of an energy storage, a transmission system, a double-fed motor, a main electromagnetic clutch, a current transformer, a circuit breaker and a unit controller, a rotor of the double-fed motor is connected with the energy storage via the transmission system, a magnet exciting coil of the double-fed motor is connected with the power grid via the current transformer, a stator coil of the double-fed motor is connected with the power grid via the circuit breaker, the energy storage, the transmission system, the double-fed motor, the current transformer and a monitor end of the circuit breaker are all connected with the unit controller, and the unit controller is connected with the central monitor through a communication interface. The elastic energy storage generation system not only can be used for storing and releasing large quantities of electricity energy, but also is not limited by geological conditions, is free of pollution and maintenance and long in service life, and provides key technology support for intelligent power grid building and combination of large-scale 'intermittent' power sources with power grids.
Description
Technical field
The utility model relate to a kind of the unnecessary electric energy of electrical network can be converted to elastic potential energy storage and in peak times of power consumption the elastic energy storage device with the energy stored feedback grid, belong to the power transmission and distribution technical field.
Background technology
The generating of electric power system, transmission of electricity, consumption are carried out simultaneously, and the equilibrium of supply and demand that keep electric energy constantly could guarantee the normal operation of electric power system.In view of electric energy still can not store at present in a large number, and electric load changes at any time, and electric power system must be reserved abundant reserve capacity just can deal with various emergency case, keeps the equilibrium of supply and demand of electric power.At present, wind power generation, photovoltaic generation have entered fast development period, because intrinsic " intermittence " and " fluctuation " of these green power supplies, their extensive access will increase the weight of the peak regulation burden of electrical network greatly, adopting the method for traditional reservation peak regulation reserve capacity to mean that needing to drop into huge fund builds supporting peak regulation unit, can only be to get half the result with twice the effort.Therefore, designing a kind of big capacity apparatus for storing electrical energy, have crucial meaning to solving intelligent grid with extensive " intermittence " power supply networking problem, is the difficult problem that the relevant technologies personnel must solve.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of electrical network elastic energy storage electricity generation system that can store in a large number and discharge electric energy is provided.
Problem described in the utility model is by realizing with following technical proposals:
A kind of electrical network elastic energy storage electricity generation system, constitute by central monitor and a plurality of system unit, each system unit is formed by energy storage body, drive system, double feedback electric engine, main electromagnetic clutch, current transformer, circuit breaker and cell controller, the rotor of described double feedback electric engine is connected with the energy storage body through drive system, its magnet exciting coil is connected with electrical network through current transformer, and the stator coil of double feedback electric engine is connected with electrical network through circuit breaker; The equal order cell controller of the monitoring client of energy storage body, drive system, double feedback electric engine, current transformer and circuit breaker, described cell controller is connected with central monitor by communication interface.
Above-mentioned electrical network elastic energy storage electricity generation system, described energy storage body is made up of a plurality of whirlpools spring case, each whirlpool spring case is made up of casing, sheet whirlpool spring, main shaft, ratchet, ratchet, gear, electromagnetic clutch, driving shaft and bearing, described main shaft is connected with casing by bearing, and the one end links to each other with driving shaft by electromagnetic clutch; The two ends of described whirlpool spring are connected with casing with main shaft respectively, and described ratchet is fixed on the main shaft, and Dui Ying ratchet is fixed on the casing with it; Described gear is fixed on the driving shaft, and the gear of a plurality of whirlpools spring case meshes successively, and the driving shaft of one of them whirlpool spring case is connected with the output shaft of drive system.
Above-mentioned electrical network elastic energy storage electricity generation system, described drive system is made of gear box and gearbox, and the high speed shaft of described gear box is connected with the rotor of double feedback electric engine by main electromagnetic clutch, and slow-speed shaft is connected with the energy storage body through gearbox.
Above-mentioned electrical network elastic energy storage electricity generation system, the three-phase voltage type PWM fully controlled bridge that described current transformer is joined by two DC side is formed, the rotor excitation coil of the interchange side joint double feedback electric engine of first fully controlled bridge, the AC side of second fully controlled bridge gets access to grid, satisfactory to both parties control bridge DC side also is provided with filter capacitor, control end order cell controller.
Double feedback electric engine of the present utility model can work in motor, generator and three kinds of states of synchronous compensator.When electric motor state, can under the driving of electrical network, pass through the energy storage of transmission system drives energy storage body, the electric energy of electrical network is converted into the elastic potential energy of whirlpool spring; When the generator state, the whirlpool spring in the energy storage body discharges elastic energy, drives the double feedback electric engine generating, and elastic potential energy is converted into the electric energy feedback grid; When synchronous phase modulation state, can provide or absorb the required reactive power of electrical network, stable access point voltage.
Because native system can be provided with a plurality of elastic energy storage electricity generation systems unit under the control of central monitor, and the energy storage body of each system unit can store lot of energy, so native system is especially suitable for use as the peak adjusting device of electrical network.The utility model not only can be stored in a large number and discharge electric energy, and not limited by geological conditions, and pollution-free, the life-span is long, and is non-maintaining, provides the key technology support for intelligent grid is connected to the grid with extensive " intermittence " power supply.
Description of drawings,
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of energy storage body;
Fig. 3 is the drive system structure schematic diagram;
The current transformer electrical schematic diagram that Fig. 4 is;
Fig. 5 is that double feedback electric engine starts schematic diagram when running on motor and synchronous compensator state.
Each label is among the figure: 1, energy storage body; 2, drive system; 3, double feedback electric engine; 4, main electromagnetic clutch; 5, driving shaft; 6, gearbox; 7, slow-speed shaft; 8, gear box; 9, high speed shaft; 10, bearing; 11, gear; 12, electromagnetic clutch; 13, main shaft; 14, whirlpool spring; 15, ratchet; 16, ratchet; 17, casing; W1--Wn, whirlpool spring case (n=1,2 ..., n, n are integer); C, filter capacitor; Q1, first fully controlled bridge; Q2, second fully controlled bridge; K1, K2, switch.
Embodiment
The utility model patent is based on the elastic energy storage principle of whirlpool spring, proposes a kind ofly can to link with electrical network, the elastic energy storage electricity generation system of fast energy storage and generating.Each system unit partly is made up of energy storage body 1, drive system 2, double feedback electric engine 3, main electromagnetic clutch, cell controller etc., tens even more a plurality of such system unit are combined, and, can form the elastic energy storage power station by the ordered control of a central monitor realization to a plurality of system units.The utility model does not have specific (special) requirements to the infield, and is pollution-free, the efficient height, and may command, can be on a large scale, big capacity ground installs and construction, can bring into play following significant role in electric power system:
(1) can be used as a kind of important peak regulation means, the peak-valley difference that solves electrical network is regulated problem.Native system can be built electrical network in everywhere according to the electrical network demand distribution, carries out energy storage and generating by the real-time control of electrical network, is used for peak regulation as existing hydroenergy storage station and participates in electric adjustment, improves electrical network degree of depth peak modulation capacity, regulates the peak-valley difference of electrical network.
(2) can be used as a kind of important stable control device, improve operation of power networks stability.Native system can provide enough electric power to store, and under the electrical network state of emergency, electrical network can it enter energy storage or generator operation state by real-time control, and the urgent power that provides electrical network to be badly in need of receives or the power support, improves the stability of operation of power networks.
(3) " intermittence " problem of solution regenerative resource is improved the quality of power supply." intermittence " that fitful power is intrinsic and " fluctuation " problem have become its serious bottleneck that inserts electrical network.If local this elastic energy storage of auxiliary construction electricity generation system of " intermittence " power supply is being arranged, by energy storage fast and generating are carried out in time control in fact, just can store unnecessary electric energy, in-situ balancing reduces the adverse effect of fitful power to electric power system, improves the ability that electrical network is admitted intermittent power supply.
(4) have synchronous phase modulation function, provide or absorb the required reactive power of electrical network, keep the access point voltage levvl.Disconnect getting in touch of double feedback electric engines 3 and drive system 2 by controlling main electromagnetic clutch 4, just can realize the synchronous condenser operation mode under the empty load of motor state, provide or absorb the required reactive power of electrical network, thus the reduction grid loss, stable access point voltage.
In a word, the utility model patent can satisfy the great strategic demand of power system development, has vast market prospect, and meaning is very great.
Referring to Fig. 1, Fig. 2 and Fig. 5, the basic functional principle of native system is:
When energy storage, central monitor sends control command to cell controller, cell controller is just controlled electromagnetic clutch 12 closures among main electromagnetic clutch 4 and the whirlpool spring case W1, K switch 1 disconnects, the K2 closure, second breaker closing, double feedback electric engine 3 rotor winding string frequency sensitive trheostats start by the induction machine mode, when rotor near after with leg speed, cell controller control K2 disconnects, the K1 closure, current transformer provides DC excitation, treats that double feedback electric engine 3 after the rotor pull-in step just runs on the synchronous motor state of rotating speed adjustable joint, drives double feedback electric engine 3 operations from the electric energy of electrical network, and the whirlpool spring 14 of whirlpool spring case W1 in the energy storage body 1 being tightened by drive system 2, whirlpool spring 14 just gets up store energy with the form of elastic potential energy; Afterwards, cell controller control electromagnetic clutch 12 disconnects, and ratchet 16 makes whirlpool spring 14 keep locking state automatically; The electromagnetic clutch closure of cell controller control whirlpool spring case W2 when electromagnetic clutch 12 disconnects according to above-mentioned identical control procedure, is finished electric energy successively to the storage of elastic potential energy in whirlpool spring case W2 and other whirlpool spring case.Stop energy storage instruction or all whirlpool spring case energy storages when full when cell controller receives, cell controller is controlled second circuit breaker and is disconnected.At this moment the native system unit is in the energy store status, up to receiving an exergonic control signal.Other system unit thermal energy storage process under the predetermined control rule control of central monitor is the same.
When releasing energy, central monitor sends control command to cell controller, cell controller is just controlled main electromagnetic clutch 4 closures, double feedback electric engine 3 works in the generator state, electromagnetic clutch 12 closures among the control whirlpool spring case W1, and the whirlpool spring 14 that its corresponding ratchet 16 is unclamped make locking discharges elastic energys, drives 3 operations of twin-lock motors by drive system 2, controls double feedback electric engine 3 simultaneously and reaches and be connected to the grid by first breaker closing during condition same period.When spring case W1 elastic potential energy release in whirlpool finishes, cell controller control electromagnetic clutch 12 disconnects, control the electromagnetic clutch closure of whirlpool spring case W2 simultaneously, according to above-mentioned identical control procedure, finish the release that elastic potential energy arrives electric energy in whirlpool spring case W2 and other whirlpool spring case successively, thereby realize the conversion of elastic potential energy to electric energy.Can instruct or all whirlpools spring case energy discharge when finishing when cell controller receives to stop to release, cell controller is controlled first circuit breaker and is disconnected.Other system unit exoergic process under the predetermined control rule control of central monitor is the same.Thus, the utility model has been realized input, storage and the output of electric energy.
When electrical network needs the utility model to run on the synchronous compensator state, central monitor sends control command to cell controller, cell controller is just controlled main electromagnetic clutch 4 and is disconnected, K switch 1 disconnects, the K2 closure, second breaker closing, and control double feedback electric engine 3 works in electric motor state, double fed electric machine rotor winding string frequency sensitive trheostat starts, when connect the induction machine mode start finish after, cell controller control switch K2 disconnects, the K1 closure, make double feedback electric engine 3 run on the synchronous compensator state,, make motor output or absorb corresponding reactive power by regulating the exciting current size of current transformer output.Stop phase modulation when instruction when cell controller receives, cell controller is controlled second circuit breaker and is disconnected.The phase modulation process is the same synchronously under the predetermined control rule control of central monitor for other system unit.
Double feedback electric engine 3 is wound induction motors, and its rotor-exciting winding inserts electrical network through current transformer, and motor stator is through circuit breaker feed-in electrical network.When double feedback electric engine ran on the generator state, the elastic energy of energy storage body 1 drove double feedback electric engine 3 operation generatings through drive system 2, gives electrical network with energy delivery.Cell controller is by amplitude, frequency, the phase place of current transformer control motor excitation electric current, and constant frequency and constant voltage and active power of output, the reactive power decoupling zero of realization double feedback electric engine 3 output electric energy are controlled.Frequency, amplitude and the phase place of double feedback electric engine 3 output voltages is not subjected to the influence of spinner velocity and instantaneous position.When running on electric motor state, electrical network by stator winding to double feedback electric engine 3 input electromagnetic powers, also by current transformer to the adjustable exciting power of double feedback electric engine 3 incoming frequencies, make the motor shaft rotation and give energy storage body 1 with energy delivery through drive system 2.When running on the synchronous compensator state, double feedback electric engine no-load running is by regulating the exciting current size of current transformer output, the reactive power of regulating output.
The function of cell controller comprises the control of system unit status monitoring, 4 controls of main electromagnetic clutch, double feedback electric engine 3 controls, current transformer control, first circuit breaker, the control of second circuit breaker and energy storage body 1 etc.The system unit status monitoring comprises status monitoring, drive system 2 status monitorings, spinner velocity/position monitoring, the voltage/current measurement of energy storage body 1; Current transformer control is used to realize the corresponding control to amplitude, frequency and the phase place of the AC excitation electric current under the double feedback electric engine 3 different running statuses; The disconnection that the control of first circuit breaker, second circuit breaker is used to realize system unit and electrical network be connected.Particularly, cell controller can be monitored the operating state of native system unit, simultaneously double feedback electric engine 3 is implemented control and first circuit breaker, second circuit breaker, ratchet 16, electromagnetic clutch 12 etc. are sent the control corresponding instruction; When double feedback electric engine 3 works in the generator state, cell controller is according to the stator and the voltage and current signal of rotor and the position and the velocity information of rotor that collect, according to given control strategy, implement the directional vector control of double feedback electric engine 3 rotor-side, first fully controlled bridge Q1 and the grid side second fully controlled bridge Q2, make elastic energy storage electricity generation system active power of output and reactive power; When double feedback electric engine works in the generator state need be incorporated into the power networks the time, cell controller may command double feedback electric engine satisfies the condition same period that is incorporated into the power networks, and first circuit breaker is sent instruction in good time, finishes and is incorporated into the power networks.
Referring to Fig. 2, energy storage body 1 is made up of the whirlpool spring case W1--Wn of a series of parallel connections, each whirlpool spring case is made up of casing 17, sheet whirlpool spring 14, main shaft 13, ratchet 15, ratchet 16, gear 11, electromagnetic clutch 12, driving shaft 5, bearing 10, main shaft 13 links to each other with driving shaft 5 by electromagnetic clutch 12, spring 14 1 ends in whirlpool are fixed on the main shaft 13 and with it by pressing plate and together rotate, the other end is fixed on the inwall place of casing 17 by pressing plate or hinged mode, and casing 17 maintains static; Ratchet 15 is contained on the main shaft 13, and an end of ratchet 16 is fixed on casing 17 inwalls.A plurality of whirlpools spring case meshes successively by gear 11 separately, and the driving shaft 5 of one of them whirlpool spring case links to each other with drive system 2.
When energy storage body 1 carries out energy storage: cell controller control electromagnetic clutch 12 closures, the rotation of drive system 2 and transmission of power are given main shaft 13, and whirlpool spring 14 is screwed gradually.When whirlpool spring 14 reached self energy storage limit or receives the energy storage halt instruction, cell controller control electromagnetic clutch 12 disconnected, and the rotation of drive system 2 and power will no longer pass to main shaft 13.At this moment, main shaft 13 has counter-rotational trend under the effect of whirlpool spring tension force, and ratchet 16 brake ratchets 15 make the main shaft 13 can not backward rotation, finish the elastic energy storage process of whirlpool spring case W1.When electromagnetic clutch 12 disconnected, the electromagnetic clutch closure of cell controller control whirlpool spring case W2 according to above-mentioned identical control procedure, was finished electric energy successively to the storage of elastic potential energy in whirlpool spring case W2 and other whirlpool spring case.Stop energy storage when instruction when cell controller receives, or all whirlpool spring case energy storages are when full, cell controller is controlled second circuit breaker and is disconnected.At this moment native system is in the energy store status, up to receiving an exergonic control signal.
When needs release energy, cell controller control electromagnetic clutch 12 closures, ratchet 16 unclamps, and main shaft 13 is backward rotation under the effect of whirlpool spring 14 elastic force, and will rotate with transmission of power and give drive system 2; When discharging, whirlpool spring case W1 elastic potential energy finishes, cell controller control electromagnetic clutch 12 disconnects, control the electromagnetic clutch closure of whirlpool spring case W2 simultaneously,, finish the release that elastic potential energy arrives electric energy in whirlpool spring case W2 and other whirlpool spring case successively according to above-mentioned identical control procedure.Stop to release can instruct the time when cell controller receives, or all whirlpool spring case energy discharge when finishing, cell controller is controlled first circuit breaker and is disconnected.
Referring to Fig. 3, drive system 2 is the devices that are rigidly connected between energy storage body 1 and the double feedback electric engine 3, is two-stage speed change (but being not limited to only two-stage) transmission, and wherein gearbox 6 constitutes first order speed change, and high speed shaft 9, gear box 8 and slow-speed shaft 7 constitute second level speed change.High speed shaft 9 is used for the connection between double feedback electric engine 3 and the gear box 8, and gear box 8 changes double feedback electric engine 3 high rotating speeds into the slow-speed of revolution, is connected with some driving shafts 5 of energy storage body 1 behind gearbox 6 by slow-speed shaft 7.
Referring to Fig. 4, current transformer is made up of the AC-DC-AC voltage type PWM three phase rectifier/inverter of two common DC links, first fully controlled bridge Q1 that promptly links to each other and the second fully controlled bridge Q2 that links to each other with electrical network with rotor, be mainly used in the AC excitation of double feedback electric engine 3, the frequency of its exciting current, amplitude and phase place are controlled by cell controller.When double feedback electric engine runs on the generator state, the first fully controlled bridge Q1 adopts the stator flux orientation vector control, the required exciting current of rotor winding feed-in to double feedback electric engine 3, realize the decoupling zero control of stator port active power and reactive power, the second fully controlled bridge Q2 adopts the control of line voltage directional vector, controls the grid side power factor and keeps the constant of two PWM current transformer intermediate link direct voltages; When double feedback electric engine 3 ran on electric motor state, current transformer made double feedback electric engine 3 by the synchronous motor operation to the adjustable exciting current of double feedback electric engine 3 incoming frequencies, and its rotating speed of scalable; When double feedback electric engine 3 runs on the synchronous compensator state, by regulating the exciting current size of current transformer output, the reactive power of regulating double feedback electric engine 3 outputs.
Referring to Fig. 1, central monitor is the supervisory control system in elastic energy storage power station, and it implements control by each cell controller to each system unit of dividing into.Be mainly used in and accept electrical network or local energy storage, generating and phase modulation control command, each cell controller is sent corresponding energy storage, generating and phase modulation instruction, and the ordering in launching of each system unit and the quantity that puts into operation are simultaneously controlled.Simultaneously, be responsible for each elastic energy storage electricity generation system unit is carried out status monitoring, guarantee that whole elastic energy storage power station operates in normal operating conditions.
Referring to Fig. 5, double feedback electric engine 3 need experience the startup link when running on motor and synchronous phase modulation state, and the utility model adopts rotor string frequency sensitive trheostat to start, and rotor string frequency sensitive trheostat can limit the starting current of motor 3 and strengthen detent torque.When energy storage starts, cell controller is controlled electromagnetic clutch 12 closures among main electromagnetic clutch 4 and the whirlpool spring case W1, K switch 1 disconnects, the K2 closure, second breaker closing then, electrical network is given double feedback electric engine 3 excitations by stator winding, start by the induction machine mode, double feedback electric engine 3 rotating speeds will increase gradually, measure rotor speed by cell controller, when rotor speed near with leg speed the time, control switch K2 disconnects, and the K1 closure makes the rotor winding switch to current transformer from the string frequency sensitive trheostat, and the control current transformer provides DC excitation, and double feedback electric engine 3 rotors run on the synchronous motor state after being drawn into synchronously.If need to regulate electronic 3 rotating speeds of double-fed, the exciting current frequency that the control current transformer changes output gets final product.When the utility model started as synchronous compensator operation, cell controller was controlled main electromagnetic clutch 4 and is disconnected, and K switch 1 disconnects, the K2 closure, and second breaker closing then, double feedback electric engine 3 start-up courses are the same.
In the electric power system actual motion, the utility model running is:
Load when electrical network is in ebb, when electric energy is had more than needed (as the late into the night), elastic energy storage power station central monitor is accepted electrical network or local energy storage instruction, and central monitor just sends energy storage for each cell controller according to the expectant control rule and instructs.Cell controller is controlled electromagnetic clutch 12 closures among main electromagnetic clutch 4 and the whirlpool spring case W1, K switch 1 disconnects, the K2 closure, second breaker closing, electrical network is given double feedback electric engine 3 excitations by stator winding, start by the induction machine mode, double feedback electric engine 3 rotating speeds will increase gradually, measure rotor speed by cell controller, when rotor speed near with leg speed the time, control switch K2 disconnects, the K1 closure, make the rotor winding switch to current transformer from the string frequency sensitive trheostat, and the control current transformer provides DC excitation, and double feedback electric engine 3 rotors run on the synchronous motor state after being drawn into synchronously, after this, the motor speed scalable, electric energy from electrical network drives double feedback electric engine 3 operations, and by drive system 2 the whirlpool spring 14 of whirlpool spring case W1 in the energy storage body 1 is tightened, when whirlpool spring 14 tightens to full position, cell controller control electromagnetic clutch 12 disconnects, and corresponding ratchet 16 is kept locking state with whirlpool spring 14; The electromagnetic clutch closure of cell controller control whirlpool spring case W2 when electromagnetic clutch 12 disconnects according to above-mentioned identical control procedure, is finished electric energy successively to the storage of elastic potential energy in whirlpool spring case W2 and other whirlpool spring case.Receive when cell controller and to stop energy storage instruction or all whirlpool spring case energy storages when full, cell controller is controlled second circuit breaker and is disconnected, up to receiving an exergonic control signal.
When electrical network is in peak load, when electric energy is not enough (as working by day the time), or electrical network is in a state of emergency when needing active power to support, elastic energy storage power station central monitor receives electrical network or local generating order, and central monitor just sends power generation command for each cell controller according to the expectant control rule.Cell controller is controlled main electromagnetic clutch 4 closures, double feedback electric engine 3 works in the generator state, electromagnetic clutch 12 closures among the control whirlpool spring case W1, and control corresponding ratchet 16 and unclamp, the whirlpool spring 14 of locking discharges elastic energy, drive double feedback electric engine 3 operations by drive system 2, control double feedback electric engine 3 simultaneously and satisfy first breaker closing when being incorporated into the power networks condition, the elastic energy storage electricity generation system is connected to the grid.When discharging, whirlpool spring case W1 elastic potential energy finishes, cell controller control electromagnetic clutch 12 disconnects, control the electromagnetic clutch closure of whirlpool spring case W2 simultaneously, according to above-mentioned identical control procedure, finish elastic potential energy successively to the release of electric energy in whirlpool spring case W2 and other whirlpool spring case, realize the conversion of elastic energy to electric energy, the qualified electric energy that the quality of power supply requires is satisfied in output, to remedy the deficiency of grid power, improve the stability of operation of power networks.Can instruct or all whirlpools spring case energy discharge when finishing when cell controller receives to stop to release, cell controller is controlled first circuit breaker and is disconnected.
In the place that " intermittence " power supply is arranged, electrical network is subjected to fitful power intrinsic " intermittence " and " fluctuation " to influence bigger.If in these local this elastic energy storage of auxiliary construction electricity generation system or elastic energy storage power station, by energy storage fast and generating are carried out in time control in fact, just can store unnecessary electric energy and discharge electric energy in good time, in-situ balancing reduces the adverse effect of fitful power to electric power system, effectively improve the self stability of the quality of power supply of electrical network and the unit that is incorporated into the power networks, improve the ability that electrical network is admitted intermittent power supply.
The electric power system basic load is an asynchronous motor, and asynchronous motor need absorb the usefulness of a large amount of reactive powers for excitation.Therefore, contain the more partial electric grid of asynchronous machine and will bear perceptual reactive current greatly, this will cause the power network line loss and the loss of voltage to increase.When local electrical network needs the utility model to run on the synchronous compensator state, central monitor receives the electrical network instruction, and send phase modulation operation for each cell controller according to the expectant control rule and instruct, cell controller tripping master electromagnetic clutch 4, and run on the synchronous compensator state after 3 startups of control double feedback electric engine, double feedback electric engine 3 no-load runnings this moment, whole elastic energy storage operation of electric power system is in synchronous pm mode.According to the practical operation situation of electrical network load, the output of regulating current transformer to be to change the exciting current of double feedback electric engine 3, and just can provide or absorb corresponding reactive power to electrical network, thus reduction line loss, stable access point voltage.
Claims (4)
1. electrical network elastic energy storage electricity generation system, it is characterized in that, it is made of central monitor and a plurality of system unit, each system unit is formed by energy storage body (1), drive system (2), double feedback electric engine (3), main electromagnetic clutch, current transformer, circuit breaker and cell controller, the rotor of described double feedback electric engine (3) is connected with energy storage body (1) through drive system (2), its rotor excitation coil is connected with electrical network through current transformer, and the stator coil of double feedback electric engine (3) is connected with electrical network through circuit breaker; The equal order cell controller of monitoring client of energy storage body (1), drive system (2), double feedback electric engine (3), current transformer and circuit breaker, described cell controller is connected with central monitor by communication interface.
2. according to the described electrical network of claim 1 elastic energy storage electricity generation system, it is characterized in that, described energy storage body (1) is made up of a plurality of whirlpools spring case, each whirlpool spring case is made up of casing (17), sheet whirlpool spring (14), main shaft (13), ratchet (15), ratchet (16), gear (11), electromagnetic clutch (12), driving shaft (5) and bearing (10), described main shaft (13) is connected with casing (17) by bearing (10), and the one end links to each other with driving shaft (5) by electromagnetic clutch (12); The two ends of described whirlpool spring (14) are connected with casing (17) with main shaft (13) respectively, and described ratchet (15) is fixed on the main shaft (13), and Dui Ying ratchet (16) is fixed on the casing (17) with it; Described gear (11) is fixed on the driving shaft (5), and the gear (11) of a plurality of whirlpools spring case meshes successively, and the driving shaft (5) of one of them whirlpool spring case is connected with the output shaft of drive system (2).
3. according to claim 1 or 2 described electrical network elastic energy storage electricity generation systems, it is characterized in that, described drive system (2) is made of gear box (8) and gearbox (6), the high speed shaft (9) of described gear box (8) is connected with the rotor of double feedback electric engine (3) by main electromagnetic clutch (4), and slow-speed shaft (7) is connected with energy storage body (1) through gearbox (6).
4. according to the described electrical network of claim 3 elastic energy storage electricity generation system, it is characterized in that, the three-phase voltage type PWM fully controlled bridge that described current transformer is joined by two DC side is formed, the rotor excitation coil of the interchange side joint double feedback electric engine (3) of first fully controlled bridge (Q1), the AC side of second fully controlled bridge (Q2) gets access to grid, satisfactory to both parties control bridge DC side also is provided with filter capacitor (C), control end order cell controller.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064561A (en) * | 2011-01-14 | 2011-05-18 | 华北电力大学（保定） | Permanent magnetic motor-type elastic energy storage power generation system |
| CN102442208A (en) * | 2011-11-02 | 2012-05-09 | 华北电力大学（保定） | Mechanical elastic energy storage driving device |
| WO2014023209A1 (en) * | 2012-08-08 | 2014-02-13 | Yang Changyi | Environment-friendly elastic energy storage power station |
| CN116365694A (en) * | 2023-01-18 | 2023-06-30 | 江苏省电力试验研究院有限公司 | Diesel generator car based on double-stator winding motor |
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2010
- 2010-03-10 CN CN2010201269830U patent/CN201639308U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064561A (en) * | 2011-01-14 | 2011-05-18 | 华北电力大学（保定） | Permanent magnetic motor-type elastic energy storage power generation system |
| CN102064561B (en) * | 2011-01-14 | 2013-04-24 | 华北电力大学（保定） | Permanent magnetic motor-type elastic energy storage power generation system |
| CN102442208A (en) * | 2011-11-02 | 2012-05-09 | 华北电力大学（保定） | Mechanical elastic energy storage driving device |
| CN102442208B (en) * | 2011-11-02 | 2014-06-25 | 华北电力大学（保定） | Mechanical elastic energy storage driving device |
| WO2014023209A1 (en) * | 2012-08-08 | 2014-02-13 | Yang Changyi | Environment-friendly elastic energy storage power station |
| CN116365694A (en) * | 2023-01-18 | 2023-06-30 | 江苏省电力试验研究院有限公司 | Diesel generator car based on double-stator winding motor |
| CN116365694B (en) * | 2023-01-18 | 2024-03-01 | 江苏省电力试验研究院有限公司 | Diesel generator car based on double-stator winding motor |
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