CN204156533U - A kind of double-fed type pumped storage with self-starting function - Google Patents
A kind of double-fed type pumped storage with self-starting function Download PDFInfo
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- CN204156533U CN204156533U CN201420216857.2U CN201420216857U CN204156533U CN 204156533 U CN204156533 U CN 204156533U CN 201420216857 U CN201420216857 U CN 201420216857U CN 204156533 U CN204156533 U CN 204156533U
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Abstract
A kind of double-fed type pumped storage with self-starting function, include the hydraulic turbine, gear box, double feedback electric engine, grid side current transformer, grid side current-variable controller, filter inductance, dc-link capacitance, rotor-side converter, rotor-side current-variable controller, grid-connected switch, self-starting switch, self-starting resistance and relevant voltage, electric current, speed probe, it is characterized in that: by self-starting switch, self-starting resistance, rotor-side converter, the cooperation of rotor-side current-variable controller controls, double feedback electric engine can automatic speedingup to 1.3 times synchronous speed, do not need to arrange the zero-speed starting problem that prime mover solves double feedback electric engine specially, contribute to the total cost of reduction system.
Description
Technical field
The utility model relates to a kind of double-fed type pumped storage, particularly a kind of double-fed type pumped storage with self-starting function.
Background technology
At present, China's electric power system construction is in Rapid development stage, and the problem such as the not high and power transmission efficiency of power shortage during peak of power consumption, active reactive under-reserve, power transmission and distribution capacity utilization is low has existence in various degree.Along with the electrical network scale of China constantly expands, the features such as the peak load shifting that pumped storage has, frequency modulation, phase modulation and emergency duty, have important function to power system security, stable and economical operation.
Pump-storage generator adopts traditional synchronous machine usually, can only operate under specified synchronous speed, and its operating condition is subject to the impact of head and load; When rotational speed of water turbine departs from optimized rotating speed, efficiency reduces, and cavitation number strengthens, and abrasion and unit vibration increase, and make unit operation degrading.Utilize double feedback electric engine to replace traditional electric-generating unit, effectively can solve traditional pumped storage speed governing and speed change problem, double feedback electric engine has good rotating speed adaptive capacity, and independent regulation is meritorious, reactive power capability; Can energy in bidirectional flow be realized, improve power factor; Motor energization current and rotating speed can be regulated, the hydraulic turbine is run near optimized rotating speed all the time, realizes motor load optimizing regulation, extend the life-span of the hydraulic turbine, improve running efficiency of system, double feedback electric engine is applied in pump-storage generator and there is very good application prospect.
Pump-storage generator Starting mode has synchronous averaging usually, asynchronous starting, static frequency convertor starts and coaxial small machine starts four kinds of modes, it is utilize silicon controlled thyristor frequency conversion device that static frequency convertor starts, output frequency is by the alternating current of zero to rated value, the rotor of the rotating magnetic field that stator current produces and excitation interacts and produces moment of accelerating, generating unit speed is made to increase, other three kinds of modes then utilize electrically its group motor interconnective to drive unit to be dragged to metasynchronism state from inactive state, put into excitation grid-connected after, produce synchronous torque and enter synchronous motor operational state.
In sum, adopt the pumped storage of synchronous machine unit, be subject to the impact of head and load, and need special starting device to drag unit from static startup, starting device is complicated, cost is high, is unfavorable for the adjustment of active power, reactive power.
Summary of the invention
In order to overcome the problems referred to above, the utility model provides a kind of double-fed type pumped storage with self-starting function, and this system can not only self-starting, and can realize controlling without impacting grid-connected and power decoupled, saves starting device cost and increases economic efficiency.
In order to achieve the above object, this invention takes following technical scheme:
A kind of double-fed type pumped storage with self-starting function, include the hydraulic turbine, gear box, double feedback electric engine, grid side current transformer, grid side current-variable controller, filter inductance, dc-link capacitance, rotor-side converter, rotor-side current-variable controller, grid-connected switch, self-starting switch, self-starting resistance and relevant voltage, electric current, speed probe, it is characterized in that: by self-starting switch, self-starting resistance, rotor-side converter, the cooperation of rotor-side current-variable controller controls, double feedback electric engine can automatic speedingup to 1.3 times synchronous speed, do not need to arrange the zero-speed starting problem that prime mover solves double feedback electric engine specially.
The described double-fed type pumped storage with self-starting function, the stator winding of double feedback electric engine is by starting switch and starting resistance short circuit, the rotor windings of double feedback electric engine is by rotor-side converter excitation, rotor-side current-variable controller adopts vector control method, the rotating speed controlling double feedback electric engine rises to 1.3 times of synchronous speeds, realizes the self-starting of pumped storage.
The described double-fed type pumped storage with self-starting function, after the rotating speed of double feedback electric engine reaches 1.3 times of synchronous speeds, first rotor-side converter demagnetization, rotor-side converter is out of service afterwards, starting resistance disconnects afterwards, and rotor-side converter puts into operation again afterwards, and rotor-side current-variable controller adopts double feedback electric engine idle grid connection control method, make the tracking of double feedback electric engine stator winding voltage realization to line voltage, thus realize the grid-connected without impacting of double feedback electric engine stator winding.
The described double-fed type pumped storage with self-starting function, after double feedback electric engine stator winding is grid-connected, rotor-side current-variable controller adopts power decoupled control method, when the hydraulic turbine draws water energy storage, rotor-side current-variable controller control double feedback electric engine stator winding absorbs active power from electrical network, sends active power when the hydraulic turbine controls double feedback electric engine stator winding as rotor-side current-variable controller during prime mover to electrical network.
The beneficial effects of the utility model are:
1, rotor-side current-variable controller controls rotor excitation current and realizes zero-speed No Load Start, saves starting device cost, reduces floor space;
2, rotor-side current-variable controller controls rotor excitation current and realizes and power decoupled control grid-connected without impact, simplifies control appliance, reduces system cost.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present utility model;
Embodiment
The utility model is a kind of double-fed type pumped storage with self-starting function, include the hydraulic turbine, gear box, double feedback electric engine, grid side current transformer, grid side current-variable controller, filter inductance, dc-link capacitance, rotor-side converter, rotor-side current-variable controller, grid-connected switch, self-starting switch, self-starting resistance and relevant voltage, electric current, speed probe, wherein the power shaft of gear box is connected with the output shaft of the hydraulic turbine, double feedback electric engine power shaft and gear box) output shaft be connected, and the rotor of double feedback electric engine is coaxially connected with encoder, the rotor windings of double feedback electric engine is connected with dc-link capacitance through rotor-side converter, the stator winding of double feedback electric engine connects self-starting switch, dc-link capacitance is connected with electrical network through grid side current transformer and filter inductance.Grid side current-variable controller is used for stable DC busbar voltage, and rotor-side current-variable controller is used for self-starting, the grid-connected and power decoupled control without impact of double feedback electric engine, and concrete implementation step is as follows:
1, the stator winding of double feedback electric engine is by starting switch and starting resistance short circuit, the rotor windings of double feedback electric engine is by rotor-side converter excitation, rotor-side current-variable controller sampling rotor current and detection motor speed, adopt vector control method, controlling double fed electric machine rotor exciting current makes the rotating speed of motor rise to 1.3 times of synchronous speeds, realizes the level and smooth self-starting of double-fed type pumped storage.
2, after the rotating speed of double feedback electric engine reaches 1.3 times of synchronous speeds, first rotor-side converter demagnetization, rotor-side converter is out of service, then starting resistance disconnects, rotor-side converter puts into operation again, the sampling of rotor-side current-variable controller line voltage, stator voltage, rotor current and motor speed, adopt double feedback electric engine idle grid connection control method, make double feedback electric engine stator winding voltage amplitude, phase place, frequency identical with electrical network, closed grid-connected switch, realizes the grid-connected without impacting of double feedback electric engine stator winding.
3, double feedback electric engine stator winding grid-connected after, motor stator winding is connected with electrical network, stator voltage equals line voltage, the sampling of rotor-side current-variable controller stator voltage, stator current, rotor current and rotating speed, the realization of employing power decoupled control method is gained merit to double feedback electric engine, the control of reactive power: when the hydraulic turbine draws water energy storage, the active power reference value arranged under Generator convention is negative value, makes double feedback electric engine stator winding absorb active power from electrical network; When the hydraulic turbine is as prime mover, arrange active power reference value under Generator convention on the occasion of, make double feedback electric engine stator winding send active power to electrical network; The reactive power that double feedback electric engine stator winding exports can need free adjustment according to electrical network.
Claims (4)
1. one kind has the double-fed type pumped storage of self-starting function, include the hydraulic turbine, gear box, double feedback electric engine, grid side current transformer, grid side current-variable controller, filter inductance, dc-link capacitance, rotor-side converter, rotor-side current-variable controller, grid-connected switch, self-starting switch, self-starting resistance and relevant voltage, electric current, speed probe, this system is by self-starting switch, the cooperation of rotor-side converter and controller thereof controls, realize the switching between zero-speed startup and normal operating mode, without the need to arranging special current transformer or prime mover for the zero-speed of double feedback electric engine starts, it is characterized in that: hydraulic turbine main shaft realizes mechanical attachment by gear box and double fed electric machine rotor, the stator winding of double feedback electric engine receives starting switch, therefore can receive starting resistance according to the condition selecting of starting switch or receive electrical network through grid-connected switch, the rotor windings of double feedback electric engine is driven by rotor-side converter, and the DC side of rotor-side converter receives AC network through dc-link capacitance and net side converter, and rotor-side converter and net side converter are independently controlled by respective controller respectively.
2. the double-fed type pumped storage with self-starting function according to claim 1, it is characterized in that: the stator winding of double feedback electric engine is by starting switch and starting resistance short circuit, the rotor windings of double feedback electric engine is by rotor-side converter excitation, rotor-side current-variable controller adopts vector control method, the rotating speed controlling double feedback electric engine rises to 1.3 times of synchronous speeds, realizes the self-starting of pumped storage.
3. the double-fed type pumped storage with self-starting function according to claim 1, it is characterized in that: after the rotating speed of double feedback electric engine reaches 1.3 times of synchronous speeds, first rotor-side converter demagnetization, rotor-side converter is out of service afterwards, starting resistance disconnects afterwards, rotor-side converter puts into operation again, rotor-side current-variable controller adopts double feedback electric engine idle grid connection control method, make the tracking of double feedback electric engine stator winding voltage realization to line voltage, thus realize the grid-connected without impacting of double feedback electric engine stator winding.
4. the double-fed type pumped storage with self-starting function according to claim 1, it is characterized in that: after double feedback electric engine stator winding is grid-connected, rotor-side current-variable controller adopts power decoupled control method, when the hydraulic turbine draws water energy storage, rotor-side current-variable controller control double feedback electric engine stator winding absorbs active power from electrical network, sends active power when the hydraulic turbine controls double feedback electric engine stator winding as rotor-side current-variable controller during prime mover to electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216857.2U CN204156533U (en) | 2014-04-25 | 2014-04-25 | A kind of double-fed type pumped storage with self-starting function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420216857.2U CN204156533U (en) | 2014-04-25 | 2014-04-25 | A kind of double-fed type pumped storage with self-starting function |
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| CN204156533U true CN204156533U (en) | 2015-02-11 |
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| CN201420216857.2U Expired - Fee Related CN204156533U (en) | 2014-04-25 | 2014-04-25 | A kind of double-fed type pumped storage with self-starting function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361233A (en) * | 2018-10-16 | 2019-02-19 | 华北电力大学 | Double-fed type variable-ratio hydroenergy storage station output power Dynamic Process Modeling method |
| CN110336502A (en) * | 2019-06-19 | 2019-10-15 | 南京南瑞继保电气有限公司 | Water-storage variable-ratio unit black starting-up AC excitation device and its control method |
| CN114069672A (en) * | 2021-11-30 | 2022-02-18 | 阳光电源股份有限公司 | Energy storage system control method and energy storage system |
-
2014
- 2014-04-25 CN CN201420216857.2U patent/CN204156533U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361233A (en) * | 2018-10-16 | 2019-02-19 | 华北电力大学 | Double-fed type variable-ratio hydroenergy storage station output power Dynamic Process Modeling method |
| CN109361233B (en) * | 2018-10-16 | 2022-04-12 | 华北电力大学 | Dynamic process modeling method for output power of double-fed variable-speed pumped storage power station |
| CN110336502A (en) * | 2019-06-19 | 2019-10-15 | 南京南瑞继保电气有限公司 | Water-storage variable-ratio unit black starting-up AC excitation device and its control method |
| CN114069672A (en) * | 2021-11-30 | 2022-02-18 | 阳光电源股份有限公司 | Energy storage system control method and energy storage system |
| CN114069672B (en) * | 2021-11-30 | 2024-05-14 | 阳光电源股份有限公司 | Energy storage system control method and energy storage system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20160425 |