CN103166220A - Off-grid Stirling power supply system structure and control method - Google Patents
Off-grid Stirling power supply system structure and control method Download PDFInfo
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- CN103166220A CN103166220A CN2013101087120A CN201310108712A CN103166220A CN 103166220 A CN103166220 A CN 103166220A CN 2013101087120 A CN2013101087120 A CN 2013101087120A CN 201310108712 A CN201310108712 A CN 201310108712A CN 103166220 A CN103166220 A CN 103166220A
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Abstract
The invention discloses an off-grid Stirling power supply system structure and a control method. The system structure comprises a Stirling engine, a three-phase asynchronous motor, a bidirectional PWM (pulse width modulation) inverter, a bidirectional DC/DC converter, a user side inverter, a storage battery, a direct-current voltage transmitter and a controller, wherein the three-phase asynchronous motor is connected with the Stirling engine, the bidirectional PWM inverter is connected with the three-phase asynchronous motor, the bidirectional DC/DC converter is connected with the bidirectional PWM inverter, the user side inverter is connected with the bidirectional PWM inverter and the bidirectional DC/DC converter, the storage battery is connected with the bidirectional DC/DC converter, and the controller is used for controlling the operating state of the bidirectional PWM inverter and the user side inverter according to direct-current bus voltage acquired by the direct-current voltage transmitter. The system structure can realize self-starting of the Stirling engine and provide a reactive power channel for the three-phase asynchronous motor, the asynchronous motor, a user and the storage battery can be balanced, so that off-grid operation of the Stirling engine is realized, and the high-efficiency Stirling engine and the asynchronous motor are wider in application.
Description
Technical field
The present invention relates to a kind of off-grid type Stirling electric power system structure and control method.
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 having the resource abundance, cleaning, widely distributed characteristics, make its application more and more extensive, 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, by becoming oar and regulating the accumulator cell charging and discharging electric current to reach this Systems balanth, 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, above two kinds of off-grid type electric power systems are all for separately field, be used for the Stirling electricity generation system, can't resolve the self-starting problem of Stirling engine, also exist simultaneously the utilization of resources insufficient, DC bus-bar voltage is unstable, the shortcoming that generating efficiency is not high.
Summary of the invention
The present invention is directed to 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, stable off-grid type Stirling electric power system structure and the control method of power supply.
Technological means of the present invention is as follows:
A kind of off-grid type Stirling electric power system structure comprises:
Be used for solar energy or gas thermal energy are converted to 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 after voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to after 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 after inversion power supply to user's side inverter of user;
Connect two-way DC/DC converter, be used for storing 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 respectively direct voltage transmitter, two-way PWM inverter and user's side inverter, the DC bus-bar voltage that is used for collecting according to the direct voltage transmitter is controlled the controller of two-way PWM inverter and user's side inverter operating state;
In addition, also comprise connecting respectively controller and two-way DC/DC converter, 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 respectively storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit, 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 consisted of by switching tube, electric power generation unloading resistance and off-load control unit; Described switching tube is connected mutually with electric power generation unloading resistance; Described off-load control unit connects respectively controller and switching tube, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the electric power generation unloading resistance of mutually connecting also is connected between the both positive and negative polarity of dc bus.
A kind of control method of off-grid type Stirling electric power system structure comprises the steps:
S1: direct voltage transmitter Real-time Collection DC bus-bar voltage, carry out S2;
S2: controller is undertaken exporting dc bus to after voltage transformation by the electric energy of the two-way DC/DC converter of two-way DC/DC control unit control to battery stores according to the DC bus-bar voltage that the direct voltage transmitter transmits, storage battery on-line monitoring unit detects battery tension, charging and discharging currents and battery temp in real time simultaneously, carries out S3;
S3: controller is controlled voltage that two-way PWM inverter transmits dc bus and is carried out exporting to after inversion threephase asynchronous machine and be used for the electric energy conversion and continue to provide reactive power for threephase asynchronous machine, after controlling simultaneously voltage that user's side inverter transmits dc bus and carrying out inversion, continued power to the user, is carried out S4;
S4: threephase asynchronous machine is operated in motoring condition, and the AC energy that two-way PWM inverter is transmitted is converted to and drives Stirling engine after mechanical energy and start, and carries out S5;
S5: after the Stirling engine startup was completed, threephase asynchronous machine was operated in generating state, and the mechanical energy that Stirling engine is transmitted is converted to electric energy, carried out S6;
S6: the alternating current that two-way PWM inverter transmits threephase asynchronous machine carries out exporting dc bus to after rectification, the battery tension that the DC bus-bar voltage that transmits according to the direct voltage transmitter with Time Controller and storage battery on-line monitoring unit transmit, regulating the operating state of two-way DC/DC converter and output voltage by two-way DC/DC control unit completes two-way DC/DC converter and DC bus-bar voltage is carried out being stored to storage battery after voltage transformation it is charged, wherein the dc bus electric energy equals charge in batteries electric energy and the electric energy sum of power supply to the user, carry out S7,
S7: the battery tension that the DC bus-bar voltage that controller transmits according to the direct voltage transmitter and storage battery on-line monitoring unit transmit, when current battery tension 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, completes by the switching frequency of controlling off-load control unit by-pass cock pipe the adjusting and the electric power generation unloading resistance that unload charged current with Time Controller unloading of the unnecessary electric energy of dc bus put;
In addition, also comprise step S8: battery tension, charging and discharging currents and battery temp that controller transmits according to storage battery on-line monitoring unit, during lower than a certain threshold voltage, the operating state of regulating two-way DC/DC converter by two-way DC/DC control unit stops battery discharging when battery tension.
owing to having adopted technique scheme, a kind of off-grid type Stirling electric power system structure provided by the invention and control method, by Stirling engine, solar energy or gas thermal energy are converted to mechanical energy, 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 again the threephase asynchronous machine that mechanical energy that generating state transmits Stirling engine is converted to electric energy, can be operated in inverter mode and DC bus-bar voltage be carried out the output AC electricity is converted to mechanical energy to the threephase asynchronous machine that is operated in motoring condition after the DC-AC conversion, and be continuously threephase asynchronous machine reactive power is provided, can be operated in again rectification state simultaneously and the threephase asynchronous machine institute output AC electric energy that is operated in generating state be carried out transferring to after the AC-DC conversion the two-way PWM inverter of dc bus, DC bus-bar voltage can be carried out charging a battery after voltage transformation, the electric energy of accumulators store can be carried out again transferring to after voltage transformation the two-way DC/DC converter of dc bus, generating efficiency of the present invention is high, can realize the self-starting of Stirling engine, operation for threephase asynchronous machine simultaneously provides idle passage, control operating state and the output voltage of discharging circuit and two-way DC/DC converter by controller, and then charging/discharging voltage and the electric current of control storage battery, guaranteed the stable of DC bus-bar voltage, guaranteed the power supply quality to the user, when system moves, can realize asynchronous machine by the charging and discharging currents of regulating storage battery, 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 power supply is stable, make the application of high efficiency stirling generator group and asynchronous machine more extensive.
Description of drawings
Fig. 1 is structured flowchart of the present invention.
Embodiment
A kind of off-grid type Stirling electric power system structure as shown in Figure 1 comprises: the Stirling engine that is used for solar energy or gas thermal energy are converted to 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 after voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to after 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 after inversion power supply to user's side inverter of user; Connect two-way DC/DC converter, be used for storing 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 respectively direct voltage transmitter, two-way PWM inverter and user's side inverter, the DC bus-bar voltage that is used for collecting according to the direct voltage transmitter is controlled the controller of two-way PWM inverter and user's side inverter operating state; In addition, also comprise connecting respectively controller and two-way DC/DC converter, 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 respectively storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit, 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 consisted of by switching tube, electric power generation unloading resistance and off-load control unit; Described switching tube is connected mutually with electric power generation unloading resistance; Described off-load control unit connects respectively controller and switching tube, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the electric power generation unloading resistance of mutually connecting also is connected between the both positive and negative polarity of dc bus.
A kind of control method of off-grid type Stirling electric power system structure comprises the steps:
S1: direct voltage transmitter Real-time Collection DC bus-bar voltage, carry out S2;
S2: controller is undertaken exporting dc bus to after voltage transformation by the electric energy of the two-way DC/DC converter of two-way DC/DC control unit control to battery stores according to the DC bus-bar voltage that the direct voltage transmitter transmits, storage battery on-line monitoring unit detects battery tension, charging and discharging currents and battery temp in real time simultaneously, carries out S3;
S3: controller is controlled voltage that two-way PWM inverter transmits dc bus and is carried out exporting to after inversion threephase asynchronous machine and be used for the electric energy conversion and continue to provide reactive power for threephase asynchronous machine, after controlling simultaneously voltage that user's side inverter transmits dc bus and carrying out inversion, continued power to the user, is carried out S4;
S4: threephase asynchronous machine is operated in motoring condition, and the AC energy that two-way PWM inverter is transmitted is converted to and drives Stirling engine after mechanical energy and start, and carries out S5;
S5: after the Stirling engine startup was completed, threephase asynchronous machine was operated in generating state, and the mechanical energy that Stirling engine is transmitted is converted to electric energy, carried out S6;
S6: the alternating current that two-way PWM inverter transmits threephase asynchronous machine carries out exporting dc bus to after rectification, the battery tension that the DC bus-bar voltage that transmits according to the direct voltage transmitter with Time Controller and storage battery on-line monitoring unit transmit, regulating the operating state of two-way DC/DC converter and output voltage by two-way DC/DC control unit completes two-way DC/DC converter and DC bus-bar voltage is carried out being stored to storage battery after voltage transformation it is charged, wherein the dc bus electric energy equals charge in batteries electric energy and the electric energy sum of power supply to the user, carry out S7,
S7: the battery tension that the DC bus-bar voltage that controller transmits according to the direct voltage transmitter and storage battery on-line monitoring unit transmit, when current battery tension 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, completes by the switching frequency of controlling off-load control unit by-pass cock pipe the adjusting and the electric power generation unloading resistance that unload charged current with Time Controller unloading of the unnecessary electric energy of dc bus put;
In addition, also comprise step S8: battery tension, charging and discharging currents and battery temp that controller transmits according to storage battery on-line monitoring unit, during lower than a certain threshold voltage, the operating state of regulating two-way DC/DC converter by two-way DC/DC control unit stops battery discharging when battery tension.
a kind of off-grid type Stirling electric power system structure provided by the invention and control method, by Stirling engine, solar energy or gas thermal energy are converted to mechanical energy, 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 again the threephase asynchronous machine that mechanical energy that generating state transmits Stirling engine is converted to electric energy, can be operated in inverter mode and DC bus-bar voltage be carried out the output AC electricity is converted to mechanical energy to the threephase asynchronous machine that is operated in motoring condition after the DC-AC conversion, and be continuously threephase asynchronous machine reactive power is provided, can be operated in again rectification state simultaneously and the threephase asynchronous machine institute output AC electric energy that is operated in generating state be carried out transferring to after the AC-DC conversion the two-way PWM inverter of dc bus, DC bus-bar voltage can be carried out charging a battery after voltage transformation, the electric energy of accumulators store can be carried out again transferring to after voltage transformation the two-way DC/DC converter of dc bus, generating efficiency of the present invention is high, can realize the self-starting of Stirling engine, operation for threephase asynchronous machine simultaneously provides idle passage, control operating state and the output voltage of discharging circuit and two-way DC/DC converter by controller, and then charging/discharging voltage and the electric current of control storage battery, guaranteed the stable of DC bus-bar voltage, guaranteed the power supply quality to the user, when system moves, can realize asynchronous machine by the charging and discharging currents of regulating storage battery, 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 power supply is stable, make the application of high efficiency stirling generator group and asynchronous machine more extensive.because threephase asynchronous machine is induction machine, when the rotary speed of its rotor rotary speed higher than magnetic field, threephase asynchronous machine is operated in generating state, use as generator, when the speed of its rotor rotary speed lower than magnetic field, 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 when rotating speed during lower than 1500rpm, it is motor, during higher than 1500rpm, it is generator when rotating speed, under motoring condition, the rotating speed of threephase asynchronous machine is generally by Frequency Converter Control, under 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 inversion reactive power is provided, and control user side inverter continues DC bus-bar voltage is carried out powering to the user after 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 controlled the battery damage of operating state to avoid causing thus of two-way DC/DC converter when abnormal by two-way DC/DC control unit, when system starts working, storage battery discharges electric energy to 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 inversion threephase asynchronous machine and be used for the electric energy conversion and continue to provide reactive power for threephase asynchronous machine, and after controlling voltage that user's side inverter transmits dc bus and carrying out inversion continued power to the user, storage battery on-line monitoring unit Real-Time Monitoring battery tension in addition, discharging current and temperature, when the battery tension that detects during 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 complete startup, Stirling engine is completed gas thermal 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 completed 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, undertaken exporting to charge in batteries after voltage transformation by the direct current of the two-way DC/DC converter of two-way DC/DC control unit control to the dc bus input, the voltage of while storage battery on-line monitoring unit Real-Time Monitoring storage battery, 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, completing by the switching frequency of controlling off-load control unit by-pass cock pipe the adjusting and the electric power generation unloading resistance that unload charged current with Time Controller puts unloading of the unnecessary electric energy of dc bus, discharging circuit of the present invention is by switching tube, electric power generation unloading resistance and off-load control unit consist of, switching tube is connected mutually with electric power generation unloading resistance, the off-load control unit connects respectively controller and switching tube, for turning on and off of the control signal control switch pipe that transmits according to controller, switching tube and the electric power generation unloading resistance of mutually connecting also is connected between the both positive and negative polarity of dc bus, and the control signal that transmits by controller in 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; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (7)
1. off-grid type Stirling electric power system structure is characterized in that comprising:
Be used for solar energy or gas thermal energy are converted to 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 after voltage transformation, and the two-way DC/DC converter that the direct current energy of battery stores is carried out being transferred to after 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 after inversion power supply to user's side inverter of user;
Connect two-way DC/DC converter, be used for storing 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 respectively direct voltage transmitter, two-way PWM inverter and user's side inverter, the DC bus-bar voltage that is used for collecting according to the direct voltage transmitter is controlled 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, characterized by further comprising and connect respectively controller and two-way DC/DC converter, 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, characterized by further 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 respectively storage battery on-line monitoring unit, direct voltage transmitter and two-way DC/DC control unit, 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, characterized by further comprising the discharging circuit that is made of switching tube, electric power generation unloading resistance and off-load control unit; Described switching tube is connected mutually with electric power generation unloading resistance; Described off-load control unit connects respectively controller and switching tube, for turning on and off of the control signal control switch pipe that transmits according to controller; Switching tube and the electric power generation unloading resistance of mutually connecting also is connected between the both positive and negative polarity of dc bus.
6. the control method of an off-grid type Stirling electric power system structure, is characterized in that comprising the steps:
S1: direct voltage transmitter Real-time Collection DC bus-bar voltage, carry out S2;
S2: controller is undertaken exporting dc bus to after voltage transformation by the electric energy of the two-way DC/DC converter of two-way DC/DC control unit control to battery stores according to the DC bus-bar voltage that the direct voltage transmitter transmits, storage battery on-line monitoring unit detects battery tension, charging and discharging currents and battery temp in real time simultaneously, carries out S3;
S3: controller is controlled voltage that two-way PWM inverter transmits dc bus and is carried out exporting to after inversion threephase asynchronous machine and be used for the electric energy conversion and continue to provide reactive power for threephase asynchronous machine, after controlling simultaneously voltage that user's side inverter transmits dc bus and carrying out inversion, continued power to the user, is carried out S4;
S4: threephase asynchronous machine is operated in motoring condition, and the AC energy that two-way PWM inverter is transmitted is converted to and drives Stirling engine after mechanical energy and start, and carries out S5;
S5: after the Stirling engine startup was completed, threephase asynchronous machine was operated in generating state, and the mechanical energy that Stirling engine is transmitted is converted to electric energy, carried out S6;
S6: the alternating current that two-way PWM inverter transmits threephase asynchronous machine carries out exporting dc bus to after rectification, the battery tension that the DC bus-bar voltage that transmits according to the direct voltage transmitter with Time Controller and storage battery on-line monitoring unit transmit, regulating the operating state of two-way DC/DC converter and output voltage by two-way DC/DC control unit completes two-way DC/DC converter and DC bus-bar voltage is carried out being stored to storage battery after voltage transformation it is charged, wherein the dc bus electric energy equals charge in batteries electric energy and the electric energy sum of power supply to the user, carry out S7,
S7: the battery tension that the DC bus-bar voltage that controller transmits according to the direct voltage transmitter and storage battery on-line monitoring unit transmit, when current battery tension 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, completes by the switching frequency of controlling off-load control unit by-pass cock pipe the adjusting and the electric power generation unloading resistance that unload charged current with Time Controller unloading of the unnecessary electric energy of dc bus put.
7. the control method of a kind of off-grid type Stirling electric power system structure according to claim 6, characterized by further comprising step S8: battery tension, charging and discharging currents and battery temp that controller transmits according to storage battery on-line monitoring unit, during lower than a certain threshold voltage, the operating state of regulating two-way DC/DC converter by two-way DC/DC control unit stops battery discharging when battery tension.
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| CN110048649A (en) * | 2018-01-16 | 2019-07-23 | 波音公司 | System and method for operating the independent speeds frequency conversion generator as starter |
| WO2022054064A1 (en) * | 2020-09-13 | 2022-03-17 | Redler Technologies Ltd | Versatile power stack unit |
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| CN104836246A (en) * | 2015-05-14 | 2015-08-12 | 电子科技大学 | Independent power supply apparatus based on pipeline flow medium pressure driver |
| CN104836246B (en) * | 2015-05-14 | 2017-11-21 | 电子科技大学 | A kind of independent power supply device based on the defeated flow media pressure driver of pipe |
| CN105553358A (en) * | 2015-12-14 | 2016-05-04 | 上海齐耀动力技术有限公司 | Free piston Stirling power generation system and control method |
| CN105553358B (en) * | 2015-12-14 | 2021-04-13 | 上海齐耀动力技术有限公司 | Free piston Stirling power generation system and control method |
| CN106059229A (en) * | 2016-06-16 | 2016-10-26 | 中车唐山机车车辆有限公司 | Asynchronous power generation system and train |
| 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 |
| CN106059229B (en) * | 2016-06-16 | 2018-10-02 | 中车唐山机车车辆有限公司 | Induction generation system and train |
| CN107394778A (en) * | 2017-09-07 | 2017-11-24 | 大连宏海新能源发展有限公司 | A kind of modified off-network Stirling electric power system structure and control method |
| CN110048649A (en) * | 2018-01-16 | 2019-07-23 | 波音公司 | System and method for operating the independent speeds frequency conversion generator as starter |
| CN109185088A (en) * | 2018-09-14 | 2019-01-11 | 甘炳春 | A kind of new energy engine based on Stirling external-burning engine |
| WO2022054064A1 (en) * | 2020-09-13 | 2022-03-17 | Redler Technologies Ltd | Versatile power stack unit |
| US11863059B2 (en) | 2020-09-13 | 2024-01-02 | Redler Technologies Ltd. | Versatile power stack unit |
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