CN203151093U - Off-grid Stirling power supply system structure - Google Patents
Off-grid Stirling power supply system structure Download PDFInfo
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- CN203151093U CN203151093U CN 201320158677 CN201320158677U CN203151093U CN 203151093 U CN203151093 U CN 203151093U CN 201320158677 CN201320158677 CN 201320158677 CN 201320158677 U CN201320158677 U CN 201320158677U CN 203151093 U CN203151093 U CN 203151093U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses an off-grid Stirling power supply system structure. The off-grid Stirling power supply system structure includes a Stirling engine; a three-phase asynchronous motor connected with the Stirling engine; a bidirectional PWM inverter connected with the three-phase asynchronous motor; a bidirectional DC/DC converter connected with the bidirectional PWM inverter; a user-side inverter connected with the bidirectional PWM inverter and the bidirectional DC/DC converter; a storage battery connected with the bidirectional DC/DC converter; a DC voltage transmitter; and a controller used for controlling working status of the bidirectional PWM inverter and the user-side inverter according to DC bus voltage collected by the DC voltage transmitter. According to the utility model, the automatic starting of the Stirling engine can be realized. At the same time, a reactive power channel is provided for the operation of the three-phase asynchronous motor and the balance of electric energy of the motor, a user and the storage battery can be realized, so that the off-grid operation of the Stirling engine is realized and the application ranges of the efficient Stirling engine and the asynchronous motor are enlarged.
Description
Technical field
The utility model relates to a kind of off-grid type Stirling electric power system structure.
Background technology
At present, energy-saving and emission-reduction have become the focus of social concerns, wherein solar energy and wind energy are owing to have the resource abundance, cleaning, widely distributed characteristics, make it use more and more widely, existing off-grid type wind power electric power system, common system configuration comprises wind-driven generator, rectifier, inverter, storage battery, unloader, wind-driven generator connects inverter and storage battery by rectifier, inverter connects the user, storage battery connects the user by described inverter simultaneously, wind-driven generator wherein adopts magneto alternator or brushless excitation synchronous generator usually, even adopt asynchronous generator also can compensate idle that the asynchronous generator excitation needs by capacitor, because above these generators all only are operated in generating state, so be attached thereto the rectifier that the alternating current for generator is exported that connects is rectified into direct current, and for the variation of load and wind regime, then by becoming oar and regulating the accumulator cell charging and discharging electric current to reach the stable of this system, existing off-grid type solar electric power supply system, common system configuration comprises solar module, storage battery and inverter, solar module connects inverter by storage battery, inverter connects the user, more than two kinds of off-grid type electric power systems all at separately field, be used for the Stirling electricity generation system, can't resolve the self-starting problem of Stirling-electric hybrid, also exist the utilization of resources insufficient simultaneously, the shortcoming that DC bus-bar voltage instability, generating efficiency are not high.
Summary of the invention
The utility model is at the proposition of above problem, and develop a kind of Stirling engine self-starting that can realize, and can provide idle passage for asynchronous machine, realize asynchronous machine, user and storage battery three electric energy balance, thus realize Stirling engine from network operation, the utilization of resources fully, the stable off-grid type Stirling electric power system structure of power supply.
The technical solution of the utility model is:
A kind of off-grid type Stirling electric power system structure comprises:
Being used for solar energy or combustion gas thermal power transfer is the Stirling engine of mechanical energy;
Connect Stirling engine, the mechanical energy that is used for Stirling engine is transmitted when being operated in generating state is converted to electric energy, and the threephase asynchronous machine that is used for driving the Stirling engine starting when being operated in motoring condition;
Connect threephase asynchronous machine, be used for the AC energy of threephase asynchronous machine output is carried out rectification, and the two-way PWM inverter that the direct current of two-way DC/DC converter output is carried out inversion;
Connect two-way PWM inverter by dc bus, be used for the direct current energy of exporting after the rectification of two-way PWM inverter is carried out being stored to storage battery behind the voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to behind the voltage transformation two-way PWM inverter or user's side inverter;
Connect two-way PWM inverter and two-way DC/DC converter by dc bus, be used for to after the rectification of two-way PWM inverter or the direct current energy of two-way DC/DC converter output carry out user's side inverter that the user is given in power supply after the inversion;
Connect two-way DC/DC converter, be used for to store the direct current energy that two-way DC/DC converter transmits and the direct current energy that storage is provided to the storage battery of two-way DC/DC converter;
The direct voltage transmitter that is used for gathering DC bus-bar voltage and is transferred to controller;
Connect direct voltage transmitter, two-way PWM inverter and user's side inverter respectively, be used for controlling according to the DC bus-bar voltage that the direct voltage transmitter collects the controller of two-way PWM inverter and user's side inverter operating state;
In addition, also comprise connecting controller and two-way DC/DC converter respectively, be used for regulating the operating state of two-way DC/DC converter and the two-way DC/DC control unit of output voltage according to the control signal of controller;
In addition, also comprise the connection storage battery, be used for detecting in real time the storage battery on-line monitoring unit of battery tension, charging and discharging currents and battery temp;
Further, described controller connects storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit respectively, be used for battery tension, charging and discharging currents and battery temp that the DC bus-bar voltage that transmits according to the direct voltage transmitter and storage battery on-line monitoring unit real-time Transmission come by transmitting control signal to two-way DC/DC control unit, realize the operating state of two-way DC/DC converter and the adjusting of output voltage;
In addition, also comprise the discharging circuit that is constituted by switching tube, off-load resistance and off-load control unit; Described switching tube is connected mutually with off-load resistance; Described off-load control unit connects controller and switching tube respectively, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the off-load resistance of mutual series connection also is connected between the both positive and negative polarity of dc bus.
Owing to adopted technique scheme, a kind of off-grid type Stirling electric power system structure that the utility model provides, be mechanical energy by Stirling engine with solar energy or combustion gas thermal power transfer, employing can be operated in motoring condition and convert electrical energy into mechanical energy and drive Stirling engine and start and can be operated in the threephase asynchronous machine that mechanical energy that generating state transmits Stirling engine is converted to electric energy again; Can be operated in inverter mode carries out after the DC-AC conversion output AC electricity with DC bus-bar voltage and is converted to mechanical energy for the threephase asynchronous machine that is operated in motoring condition, and be continuously threephase asynchronous machine reactive power is provided, can be operated in rectification state carries out transferring to after the AC-DC conversion dc bus to the threephase asynchronous machine institute output AC electric energy that is operated in generating state two-way PWM inverter simultaneously again; DC bus-bar voltage can be carried out charging a battery behind the voltage transformation, the electric energy of accumulators store can be carried out transferring to behind the voltage transformation the two-way DC/DC converter of dc bus again, the utility model generating efficiency height, can realize the self-starting of Stirling engine, operation for threephase asynchronous machine simultaneously provides idle passage, operating state and output voltage by controller control discharging circuit and two-way DC/DC converter, and then control charging and discharging of accumulator voltage and current, guaranteed the stable of DC bus-bar voltage, guaranteed the power supply quality to the user, when system moves, can realize asynchronous machine by regulating the charging and discharging of accumulator electric current, the balance of user and storage battery three electric energy, realized generating, electricity consumption and the balance that discharges and recharges, thereby realize Stirling engine from network operation, this system's power supply is stable, makes that the application of high efficiency stirling generator group and asynchronous machine is more extensive.
Description of drawings
Fig. 1 is structured flowchart of the present utility model.
Embodiment
A kind of off-grid type Stirling electric power system structure as shown in Figure 1 comprises: being used for solar energy or combustion gas thermal power transfer is the Stirling engine of mechanical energy; Connect Stirling engine, the mechanical energy that is used for Stirling engine is transmitted when being operated in generating state is converted to electric energy, and the threephase asynchronous machine that is used for driving the Stirling engine starting when being operated in motoring condition; Connect threephase asynchronous machine, be used for the AC energy of threephase asynchronous machine output is carried out rectification, and the two-way PWM inverter that the direct current of two-way DC/DC converter output is carried out inversion; Connect two-way PWM inverter by dc bus, be used for the direct current energy of exporting after the rectification of two-way PWM inverter is carried out being stored to storage battery behind the voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to behind the voltage transformation two-way PWM inverter or user's side inverter; Connect two-way PWM inverter and two-way DC/DC converter by dc bus, be used for to after the rectification of two-way PWM inverter or the direct current energy of two-way DC/DC converter output carry out user's side inverter that the user is given in power supply after the inversion; Connect two-way DC/DC converter, be used for to store the direct current energy that two-way DC/DC converter transmits and the direct current energy that storage is provided to the storage battery of two-way DC/DC converter; The direct voltage transmitter that is used for gathering DC bus-bar voltage and is transferred to controller; Connect direct voltage transmitter, two-way PWM inverter and user's side inverter respectively, be used for controlling according to the DC bus-bar voltage that the direct voltage transmitter collects the controller of two-way PWM inverter and user's side inverter operating state; In addition, also comprise connecting controller and two-way DC/DC converter respectively, be used for regulating the operating state of two-way DC/DC converter and the two-way DC/DC control unit of output voltage according to the control signal of controller; Also comprise the connection storage battery, be used for detecting in real time the storage battery on-line monitoring unit of battery tension, charging and discharging currents and battery temp; Further, described controller connects storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit respectively, be used for battery tension, charging and discharging currents and battery temp that the DC bus-bar voltage that transmits according to the direct voltage transmitter and storage battery on-line monitoring unit real-time Transmission come by transmitting control signal to two-way DC/DC control unit, realize the operating state of two-way DC/DC converter and the adjusting of output voltage; In addition, also comprise the discharging circuit that is constituted by switching tube, off-load resistance and off-load control unit; Described switching tube is connected mutually with off-load resistance; Described off-load control unit connects controller and switching tube respectively, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the off-load resistance of mutual series connection also is connected between the both positive and negative polarity of dc bus.
A kind of off-grid type Stirling electric power system structure that the utility model provides, be mechanical energy by Stirling engine with solar energy or combustion gas thermal power transfer, employing can be operated in motoring condition and convert electrical energy into mechanical energy and drive Stirling engine and start and can be operated in the threephase asynchronous machine that mechanical energy that generating state transmits Stirling engine is converted to electric energy again; Can be operated in inverter mode carries out after the DC-AC conversion output AC electricity with DC bus-bar voltage and is converted to mechanical energy for the threephase asynchronous machine that is operated in motoring condition, and be continuously threephase asynchronous machine reactive power is provided, can be operated in rectification state carries out transferring to after the AC-DC conversion dc bus to the threephase asynchronous machine institute output AC electric energy that is operated in generating state two-way PWM inverter simultaneously again; DC bus-bar voltage can be carried out charging a battery behind the voltage transformation, the electric energy of accumulators store can be carried out transferring to behind the voltage transformation the two-way DC/DC converter of dc bus again, the utility model generating efficiency height, can realize the self-starting of Stirling engine, operation for threephase asynchronous machine simultaneously provides idle passage, operating state and output voltage by controller control discharging circuit and two-way DC/DC converter, and then control charging and discharging of accumulator voltage and current, guaranteed the stable of DC bus-bar voltage, guaranteed the power supply quality to the user, when system moves, can realize asynchronous machine by regulating the charging and discharging of accumulator electric current, the balance of user and storage battery three electric energy, realized generating, electricity consumption and the balance that discharges and recharges, thereby realize Stirling engine from network operation, this system's power supply is stable, makes that the application of high efficiency stirling generator group and asynchronous machine is more extensive.Because threephase asynchronous machine is induction machine, when the rotary speed of its rotor is higher than the rotary speed in magnetic field, then threephase asynchronous machine is operated in generating state, use as generator, when the speed of its rotor is lower than the rotary speed in magnetic field, then threephase asynchronous machine is operated in motoring condition, uses as motor, as select the threephase asynchronous machine of 4 utmost points, its synchronous speed is 1500rpm, and then when rotating speed was lower than 1500rpm, it was motor, when rotating speed was higher than 1500rpm, it was generator; Under the motoring condition, the rotating speed of threephase asynchronous machine is generally by Frequency Converter Control, under the generating state, when the electric energy of threephase asynchronous machine output greater than the actual consumption electric energy, Stirling engine drives the threephase asynchronous machine speedup, when the electric energy of threephase asynchronous machine output less than the actual consumption electric energy, Stirling engine drives threephase asynchronous machine and slows down, when no matter threephase asynchronous machine is operated in motoring condition or generating state, controller is all controlled two-way PWM inverter and is continued that DC bus-bar voltage is carried out exporting to threephase asynchronous machine after the inversion reactive power is provided, and control user side inverter continues DC bus-bar voltage is carried out powering to the user after the inversion, storage battery on-line monitoring unit detects battery tension in real time, charging and discharging currents and battery temp parameter, when charging and discharging currents and battery temp are unusual, control the battery damage of operating state to avoid causing thus of two-way DC/DC converter by two-way DC/DC control unit, when system starts working, storage battery discharges electric energy and gives two-way DC/DC converter, the DC bus-bar voltage that the direct voltage transmitter monitors at this moment is greater than initial voltage, controller is by controlling two-way DC/DC control unit and then controlling two-way DC/DC converter the electric energy that storage battery discharges is carried out the voltage transformation DC power output, this direct current energy exports two-way PWM inverter and user's side inverter to by dc bus, the direct voltage of the two-way DC/DC converter output that the direct voltage transmitters sense has to the dc bus also outputs signal to controller, controller is controlled voltage that two-way PWM inverter transmits dc bus and is carried out exporting to after the inversion threephase asynchronous machine and be used for the electric energy conversion and continue to provide reactive power for threephase asynchronous machine, and control user side inverter voltage that dc bus is transmitted carry out inversion after continued power give the user, storage battery on-line monitoring unit is monitored battery tension in real time in addition, discharging current and temperature, when detected battery tension is lower than a certain threshold voltage, controlling two-way DC/DC converter by two-way DC/DC control unit stops storage battery input electric energy is carried out conversion and then avoided putting, the AC energy of two-way PWM inverter output is exported to threephase asynchronous machine, threephase asynchronous machine is operated in motoring condition and converts electrical energy into mechanical energy, drive Stirling engine and finish startup, Stirling engine is finished combustion gas heat energy to the conversion of mechanical energy after starting, Stirling engine drives threephase asynchronous machine and is operated in generating state, mechanical energy is converted to exports direct current to dc bus after electric energy is finished rectification by two-way PWM inverter, controller according to the direct voltage transmitters sense to two-way PWM inverter export the direct current of dc bus and the battery tension that storage battery on-line monitoring unit transmits to, controlling two-way DC/DC converter by two-way DC/DC control unit carries out exporting to charge in batteries behind the voltage transformation to the direct current of dc bus input, storage battery on-line monitoring unit is monitored the voltage of storage battery in real time simultaneously, charging current and temperature, when the battery tension that detects reaches the storage battery rated voltage, the operating state of regulating two-way DC/DC converter by two-way DC/DC control unit stops charge in batteries and then avoids overcharging, simultaneously controller is finished the adjusting and the off-load resistance that unload charged current by the switching frequency of control off-load control unit by-pass cock pipe unloading of the unnecessary electric energy of dc bus is put, and discharging circuit of the present utility model is by switching tube, off-load resistance and off-load control unit constitute; Switching tube is connected mutually with off-load resistance; The off-load control unit connects controller and switching tube respectively, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the off-load resistance of mutual series connection also is connected between the both positive and negative polarity of dc bus, and the control signal that transmits by controller in the real work is utilized the switching frequency of off-load control unit by-pass cock pipe, thereby realizes unloading the adjusting of charged current.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.
Claims (5)
1. off-grid type Stirling electric power system structure is characterized in that comprising:
Being used for solar energy or combustion gas thermal power transfer is the Stirling engine of mechanical energy;
Connect Stirling engine, the mechanical energy that is used for Stirling engine is transmitted when being operated in generating state is converted to electric energy, and the threephase asynchronous machine that is used for driving the Stirling engine starting when being operated in motoring condition;
Connect threephase asynchronous machine, be used for the AC energy of threephase asynchronous machine output is carried out rectification, and the two-way PWM inverter that the direct current of two-way DC/DC converter output is carried out inversion;
Connect two-way PWM inverter by dc bus, be used for the direct current energy of exporting after the rectification of two-way PWM inverter is carried out being stored to storage battery behind the voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to behind the voltage transformation two-way PWM inverter or user's side inverter;
Connect two-way PWM inverter and two-way DC/DC converter by dc bus, be used for to after the rectification of two-way PWM inverter or the direct current energy of two-way DC/DC converter output carry out user's side inverter that the user is given in power supply after the inversion;
Connect two-way DC/DC converter, be used for to store the direct current energy that two-way DC/DC converter transmits and the direct current energy that storage is provided to the storage battery of two-way DC/DC converter;
The direct voltage transmitter that is used for gathering DC bus-bar voltage and is transferred to controller;
Connect direct voltage transmitter, two-way PWM inverter and user's side inverter respectively, be used for controlling according to the DC bus-bar voltage that the direct voltage transmitter collects the controller of two-way PWM inverter and user's side inverter operating state.
2. a kind of off-grid type Stirling electric power system structure according to claim 1, it is characterized in that also comprising connecting controller and two-way DC/DC converter respectively, be used for regulating the operating state of two-way DC/DC converter and the two-way DC/DC control unit of output voltage according to the control signal of controller.
3. a kind of off-grid type Stirling electric power system structure according to claim 1 is characterized in that also comprising the connection storage battery, is used for detecting in real time the storage battery on-line monitoring unit of battery tension, charging and discharging currents and battery temp.
4. according to claim 2 or 3 described a kind of off-grid type Stirling electric power system structures, it is characterized in that described controller connects storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit respectively, be used for battery tension, charging and discharging currents and battery temp that the DC bus-bar voltage that transmits according to the direct voltage transmitter and storage battery on-line monitoring unit real-time Transmission come by transmitting control signal to two-way DC/DC control unit, realize the operating state of two-way DC/DC converter and the adjusting of output voltage.
5. a kind of off-grid type Stirling electric power system structure according to claim 1 is characterized in that also comprising the discharging circuit that is made of switching tube, off-load resistance and off-load control unit; Described switching tube is connected mutually with off-load resistance; Described off-load control unit connects controller and switching tube respectively, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the off-load resistance of mutual series connection also is connected between the both positive and negative polarity of dc bus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320158677 CN203151093U (en) | 2013-03-30 | 2013-03-30 | Off-grid Stirling power supply system structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320158677 CN203151093U (en) | 2013-03-30 | 2013-03-30 | Off-grid Stirling power supply system structure |
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| CN203151093U true CN203151093U (en) | 2013-08-21 |
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| CN 201320158677 Expired - Fee Related CN203151093U (en) | 2013-03-30 | 2013-03-30 | Off-grid Stirling power supply system structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166220A (en) * | 2013-03-30 | 2013-06-19 | 大连宏海新能源发展有限公司 | Off-grid Stirling power supply system structure and control method |
| WO2017215182A1 (en) * | 2016-06-16 | 2017-12-21 | 中车唐山机车车辆有限公司 | Induction generation system and train |
-
2013
- 2013-03-30 CN CN 201320158677 patent/CN203151093U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166220A (en) * | 2013-03-30 | 2013-06-19 | 大连宏海新能源发展有限公司 | Off-grid Stirling power supply system structure and control method |
| CN103166220B (en) * | 2013-03-30 | 2015-12-02 | 大连宏海新能源发展有限公司 | A kind of off-grid type Stirling electric power system structure and control method |
| WO2017215182A1 (en) * | 2016-06-16 | 2017-12-21 | 中车唐山机车车辆有限公司 | Induction generation system and train |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Off-grid Stirling power supply system structure and control method Effective date of registration: 20140108 Granted publication date: 20130821 Pledgee: Li Zhian Pledgor: Dalian Great Ocean New Energy Development Co., Ltd. Registration number: 2014990000022 |
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Date of cancellation: 20190801 Granted publication date: 20130821 Pledgee: Li Zhian Pledgor: Dalian Great Ocean New Energy Development Co., Ltd. Registration number: 2014990000022 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |