CN103633667A - Water pumping power regulating system and method based on IGBT (Insulated Gate Bipolar Transistor) control - Google Patents
Water pumping power regulating system and method based on IGBT (Insulated Gate Bipolar Transistor) control Download PDFInfo
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Abstract
The invention discloses a water pumping power regulating system and method based on IGBT (Insulated Gate Bipolar Transistor) control. The water pumping power regulating system is connected to a power station monitoring system and a pump storage group, and comprises an IGBT controller and a power regulating circuit group; the power regulating circuit group comprises multiple groups of power regulating circuits; wherein the IGBT controller is used for receiving a water pumping energy storage instruction output by the power station monitoring system, and analyzing a water pumping energy storage instruction to obtain a required water pumping power; N groups of power regulating circuits in the power regulating circuit group are started according to the water pumping power, wherein N-1 groups of power regulating circuits perform full-power output, left one group of power regulating circuits performs power regulation output so that the output powers of the N groups of power regulating circuits reach water pumping powers; the power regulating circuit groups are used for outputting water pumping powers to the pump storage group, and the pump storage group pumps water according to the water pumping power.
Description
Technical Field
The invention relates to the research on the operation condition of a pumped storage power station unit in the field of power grid power, in particular to a pumped power adjusting system and method based on IGBT control.
Background
The pumped storage unit bears important tasks of peak clipping, valley filling, peak regulation, frequency modulation and accident standby in a power grid, has the capacity of variable power peak regulation and frequency modulation in the power generation working condition at present, can only bear the effect of the valley filling of the power grid in a constant power mode in the pumping working condition, and does not have the function of large-range variable power regulation.
The development of extra-high voltage alternating current and extra-high voltage direct current technology provides possibility for forming interconnection of various large power grid regions, currently, China is building an intelligent power grid which is characterized by interconnection of a plurality of extra-high voltage lines and is used for improving the consumption capacity of the large power grid on new energy such as wind, electricity and solar energy, the power generated by solar energy and wind energy is mostly unstable, strong in randomness and high in power prediction difficulty, so that the large power grid puts forward the requirement of a water pumping working condition variable power regulation function on a water pumping energy storage unit, namely the water pumping energy storage unit is required to realize continuous water pumping power regulation in the water pumping working condition so as to adapt to the power variation of solar energy and wind energy generation.
In order to realize the functions, the following technologies are adopted successively by countries in the world to realize the goal of variable power: pole-changing speed-changing technology, double-fed AC excitation power-changing speed-changing technology and the like.
Wherein, the pole-changing and speed-changing technology is used for changing the pole pair number of the generator. For example: pan Jiakou energy storage power plants and Honghun energy storage power plants. The concrete conditions of the energy storage power plant in the flood are as follows: maximum water pumping lift: the water pumping minimum lift is 32 meters, the rated rotating speed under the water pumping working condition needs to be changed for improving the water pumping efficiency under different water heads due to the large water head change of a flood-panel water pumping energy storage power station, the speed change mode is realized by the pole changing operation of increasing 18 pairs of magnetic poles to 21 pairs of magnetic poles, and the rotating speeds under the corresponding two conditions are two gears: 166.7/142.86R/min. The situation of the Pan-House-entrance energy storage power plant is similar to that of the Honghun energy storage power plant. Because the amplitude ratio of the water head of the Panjiakou hydropower station is large, the water head is changed within the range of 36-85.7 m, the pump turbine can be stable and efficient only by adopting multi-speed segmentation or variable-speed operation, and the rotating speed is divided into two gears: 125/142.86R/min.
Because the rotating speed of the unit is changed by reducing the number of the 24 pairs of magnetic poles to the number of the 21 pairs of magnetic poles, the water pumping efficiency of the unit is only improved to a certain extent, but the two power stations are still in a constant power operation mode under the water pumping working condition, and the large-range variable power adjustment of the water pumping working condition of the unit is difficult to realize.
The variable power technology of the doubly-fed induction AC excitation motor comprises the following steps: by introducing alternating current into the excitation winding, due to the mathematical relationship of (stator field rotation speed) N1= Nm (rotor mechanical rotation speed) + N2 (rotor field rotation speed), when the rotor mechanical rotation speed changes, the rotor field rotation speed is correspondingly tracked and adjusted to compensate the rotor mechanical rotation speed change, so that the output frequency of the motor is still the rated frequency, and at the moment, the actual output power of the motor power is P = P1 (motor power) ± P2 (alternating current excitation power). Thus, the function of changing the speed and the power can be realized.
Because the rotor winding adopts alternating current excitation, the pumping power adjusting range which can be realized by the rotor winding is smaller, and the power adjusting range rarely exceeds the adjusting range of 30 percent of rated power. The specific numerical values are: the rated power of the general unit is about 85MVA to 475MVA, and the power of the rotor alternating current winding is between +/-25 MVA and +/-72 MVA.
Disclosure of Invention
The two adjusting technologies for the pumping working conditions are difficult to realize variable power adjustment by changing the magnetic pole logarithm mode, and the power range is adjusted to be smaller by alternating current excitation; when wind and solar power become large, the water pumping power of the water pumping and energy storage unit needs to be increased, when the wind and solar power become small, the water pumping power of the water pumping and energy storage unit needs to be reduced, the water pumping power of the water pumping and energy storage unit and the water pumping power of the water pumping and energy storage unit are used for achieving balance of charge and discharge, impact of power on voltage and power flow of a power grid is reduced, and the frequency of the power grid can be automatically kept stable no matter whether the wind is large or small or the solar illumination is. However, wind power and solar power are mostly unstable, and when the wind power and the solar power in the power grid change, the existing pumping condition adjusting technology cannot well balance the power of the power grid and the pumping power of the pumping energy storage unit, which may cause the power grid to suffer from the impact of the change of the wind power and the solar power.
The invention adopts the existing high-voltage, large-capacity, high-power-density and high-performance power electronic device, applies advanced control strategies and designs a pumping condition variable power regulation technical scheme of the pumping energy storage unit, meets the urgent requirements of a power grid on the pumping condition variable power regulation function of the pumping energy storage unit, and better plays the roles of peak regulation, frequency regulation, peak clipping and valley filling of the pumping energy storage unit in the power grid, thereby improving the absorption capacity of the large power grid on new energy resources such as wind, electricity, solar energy and the like.
In order to achieve the above object, the present invention provides a pumped power regulating system based on IGBT control, the system is connected to a power station monitoring system and a pumped storage unit, and the system includes: an IGBT controller and a power regulating circuit group; the power regulating circuit group comprises a plurality of groups of power regulating circuits; the IGBT controller is used for receiving a pumped storage instruction output by the power station monitoring system, analyzing the pumped storage instruction and obtaining required pumped power; starting N groups of power regulating circuits in the power regulating circuit group according to the pumping power, wherein N-1 groups of power regulating circuits perform full power output, and the rest 1 group of power regulating circuits perform power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power; the power regulating circuit group is used for outputting the pumping power to the pumping energy storage unit, and the pumping energy storage unit performs pumping working condition operation according to the pumping power.
In order to achieve the aim, the invention provides a pumping power adjusting method based on IGBT control, which is used for obtaining a pumping energy storage instruction; analyzing the pumped storage instruction to obtain the required pumped power; starting N groups of power regulating circuits in the power regulating circuit group according to the pumping power, wherein N-1 groups of power regulating circuits carry out full power output, and the rest 1 groups of power regulating circuits carry out power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power; and the pumped storage unit operates under the pumping working condition according to the pumping power.
According to the pumping power adjusting system and method based on IGBT control, the power generation and pumping double-working-condition variable power adjustment is realized, the power of the power grid is balanced in a balanced manner during the pumping power adjustment, the power grid is impacted by unstable power such as wind and solar energy, and the frequency of the power grid can be kept stable no matter the wind is large or small, and the solar energy is strong or weak.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a pumping power regulating system based on IGBT control according to an embodiment of the present invention.
Fig. 2A is a schematic structural diagram of a one-to-one transformer in a power conditioning circuit set according to an embodiment of the invention.
Fig. 2B is a schematic structural diagram of a pair of multi-transformers in a power conditioning circuit set according to another embodiment of the invention.
Fig. 3 is a schematic diagram of the overall structure of a pumped-hydro energy storage system according to another embodiment of the present invention.
Fig. 4 is a flowchart of a pumping power adjustment method based on IGBT control according to an embodiment of the present invention.
Fig. 5 is an overall circuit diagram of a pumped-hydro energy storage system according to an embodiment of the invention.
Fig. 6 is a partial circuit diagram of a pumped-hydro energy storage system in accordance with an embodiment of the present invention.
Detailed Description
The technical means adopted by the invention to achieve the predetermined object of the invention are further described below with reference to the drawings and the preferred embodiments of the invention.
In the embodiment of the present invention, the IGBT control method used is: the work principle of the composite full-control type voltage driving trigger power control is that the Pulse Width Modulation (PWM) basic principle is utilized, the voltage signal is triggered at a high speed or the on or off of the voltage signal is controlled by controlling the existence or nonexistence of the voltage, and the width of each pulse trigger voltage is controlled according to a uniform proportionality coefficient to control the output sine alternating current waveform, the output voltage and the output frequency, so that the output power and the rotating speed are adjusted.
Fig. 1 is a schematic structural diagram of a pumping power regulating system based on IGBT control according to an embodiment of the present invention. As shown in fig. 1, the pumped-water power regulating system 1 is connected to a power station monitoring system 2 and a pumped-water energy storage group 3, and includes: a power regulating circuit group 10, an IGBT controller 20; the power regulating circuit group 10 includes a plurality of groups of power regulating circuits; wherein,
the IGBT controller 20 is used for receiving the pumped storage instruction output by the power station monitoring system 2, analyzing the pumped storage instruction and obtaining the required pumped power; starting N groups of power regulating circuits in the power regulating circuit group 10 according to the pumping power, wherein N-1 groups of power regulating circuits perform full power output, and the rest 1 groups of power regulating circuits perform power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power;
the power regulating circuit group 10 is used for outputting pumping power to the pumped storage unit 3, and the pumped storage unit 3 performs pumped storage according to the pumping power.
In this embodiment, the calculation method for starting the N groups of power adjusting circuits in the power adjusting circuit group 10 according to the pumping power is as follows:
wherein, P is the required pumping power, MW;
PMpower, MW, at full power output for a set of power conditioning circuits;
n is the number of groups of the power regulating circuit which is rounded up; wherein, N-1 groups of power regulating circuits carry out full power output, and the rest 1 group carries out power regulating output. When the N groups of power regulating circuits are started, the first N groups are not fixedly started from the 1 st group in sequence, and certain fixed groups are not always kept working; after a certain group is standby or works for a period of time, the alternate working state can be carried out, so that each power regulating circuit can be ensured to carry out alternate working.
The above control method can be called as: the N-1+1 mode is that: n-1 groups work at full power, and the last 1 group undertakes the task of adjusting power; through the control strategy, one part of the power regulating circuits works, the other part of the power regulating circuits stands by, the working circuits and the standby circuits can be periodically alternated, and the working circuits and the standby circuits do not work in the first fixed groups or certain groups, so that all the devices of the power regulating circuits work alternately, and compared with the control strategy that all the devices work in an evenly distributed mode, the control strategy prolongs the service life of each device.
Fig. 2A is a schematic structural diagram of a one-to-one transformer in a power conditioning circuit set according to an embodiment of the invention. Fig. 2B is a schematic structural diagram of a pair of multi-transformers in a power conditioning circuit set according to another embodiment of the invention. As shown in fig. 2A and fig. 2B, each set of power conditioning circuit 11 includes: an IGBT rectifier 31, a smoothing reactor 41, an IGBT inverter 51; the IGBT rectifier 31 is connected with the smoothing reactor 41 and the IGBT controller 20; the IGBT inverter 51 is connected with the smoothing reactor 41 and the IGBT controller 20; wherein,
an IGBT rectifier 31 for rectifying the alternating current into direct current;
the smoothing reactor 41 is used for smoothing direct current and reducing direct current ripple factors;
an IGBT inverter 51 for inverting the direct current into alternating current of variable power and frequency;
and the IGBT controller 20 is configured to control operating states of the IGBT rectifier 31 and the IGBT inverter 51, and adjust output power of the IGBT inverter 51 in a PWM pulse width modulation manner.
In the embodiment of the invention, the basic principle of the adopted PWM mode is as follows: the switching of the inverter 51 is controlled so that the output end receives a series of pulses of equal amplitude, which are used to replace a sine wave or a desired waveform. That is, a plurality of pulses are generated in a half cycle of an output waveform, so that the equivalent power of each pulse is a sine waveform, and the obtained output is smooth and has few low-order harmonics. The width of each pulse is modulated according to a certain rule, so that the output voltage of the inverter circuit can be changed, and the output power and frequency can also be changed. The PWM method is well known in the art and will not be described herein.
In one embodiment, the set of power conditioning circuits 10 includes 15 sets of power conditioning circuits 11. The rated output power of each IGBT rectifier 31 is 20 MW; the rated output power of the IGBT inverter 51 is 20 MW.
As shown in fig. 2A, the power conditioning circuit group 10 further includes: a plurality of converter transformers 21 and a plurality of step-up transformers 61; the converter transformer 21 may be a three-winding transformer, and the booster transformer 61 may be a two-winding transformer;
each converter transformer 21 is connected with an IGBT rectifier 31 respectively, and is used for stepping down the voltage to the required voltage of the corresponding IGBT rectifier 31;
each step-up transformer 61 is connected to an IGBT inverter 51 and the pumped storage group 3, respectively, and is configured to step up the output voltage of the corresponding IGBT inverter 51 to the rated voltage of the pumped storage group 3.
As shown in fig. 2B, in another embodiment, a multi-winding converter transformer 21 'and a multi-winding step-up transformer 61' may also be disposed in the power conditioning circuit group 10; the principle is the same as that of fig. 2A, and the three-winding transformer and the double-winding transformer are replaced by the multi-winding transformer by changing the windings of the transformer, so that the configuration number of the transformers is reduced.
Fig. 3 is a schematic diagram of the overall structure of a pumped-hydro energy storage system according to another embodiment of the present invention. As shown in fig. 3, the pumped-hydro energy storage system is provided with a main transformer 30 and a generator synchronous breaker 40 (GCB); the generator synchronous breaker 40 is connected to the converter transformer 21 and the main transformer 30 in the power conditioning circuit group 10, and the main transformer 30 is connected to the grid 6.
In this embodiment, the pumping power adjustment system 1 further includes an excitation controller 50, and the excitation controller 50 is connected to the IGBT controller 20 and the pumping energy storage unit 3;
when the IGBT controller 20 adjusts the output power of the circuit group 10 according to the adjustment power, the excitation controller is configured to correspondingly adjust the excitation current and the excitation voltage of the pumped storage unit 3, so that the pumped storage unit 3 operates stably.
In the embodiment, the power station monitoring system 2 is connected to the RTU system 4, and the RTU system 4 communicates with a power dispatching system 5; wherein,
the power dispatching system 5 generates an automatic control instruction according to the power grid power data of the power grid 6;
and the RTU system 4 is used for receiving the automatic control instruction, generating a pumped storage instruction and sending the pumped storage instruction to the power station monitoring system 2.
In addition, the staff can also input manual control instructions to the RTU system 4 manually, and the RTU system 4 generates pumped storage instructions through the manual control instructions and sends the pumped storage instructions to the power station monitoring system 2.
Fig. 4 is a flowchart of a pumping power adjustment method based on IGBT control according to an embodiment of the present invention. As shown in fig. 4, the method includes:
step S401, acquiring a pumped storage instruction;
step S402, analyzing a pumped storage instruction to obtain the required pumped power;
step S403, starting N groups of power regulating circuits in the power regulating circuit group according to the pumping power, wherein N-1 groups of power regulating circuits perform full power output, and the rest 1 groups of power regulating circuits perform power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power;
and S404, the pumped storage unit performs pumped storage according to the pumping power.
In step S403, the calculation method for starting N groups of power adjusting circuits in the power adjusting circuit group according to the pumping power is as follows:
wherein, P is the required pumping power, MW;
PMpower, MW, at full power output for a set of power conditioning circuits;
n is the number of groups of the power regulating circuit which is rounded up; wherein, N-1 groups of power regulating circuits carry out full power output, and the rest 1 group carries out power regulating output. The output power of the power regulating circuit is regulated by adopting a PWM (pulse width modulation) mode.
In this embodiment, the method further includes: step S4011, generating an automatic control instruction according to the power grid power data;
and step S4012, generating a pumped storage instruction according to the automatic control instruction.
In addition, the staff can input manual control instructions manually and generate pumped storage instructions according to the manual control instructions;
in step S403 and step S404 of this embodiment, when the output power of the circuit is adjusted, the excitation current and the excitation voltage of the pumped-storage unit are adjusted accordingly, so that the pumped-storage unit operates stably.
Fig. 5 is an overall circuit diagram of a pumped-hydro energy storage system according to an embodiment of the invention. As shown in fig. 5, the work flow of power generation is as follows: the water flow drives the pumped storage unit, the generator generates power in the power generation direction, and the generated power is sent to a power grid through the 1G isolation disconnecting link and the generator synchronous breaker.
Fig. 6 is an overall partial circuit diagram of a pumped-hydro energy storage system according to an embodiment of the invention. With reference to fig. 5 and 6, the water pumping process includes:
the power dispatching system (not shown) issues an automatic control instruction to the RTU system 4 according to the power of the power grid; the RTU system 4 generates a pumped storage instruction according to the automatic control instruction and sends the pumped storage instruction to the power station monitoring system 2; the power station monitoring system 2 sends a pumped storage instruction to the IGBT controller 20;
after the IGBT controller 20 analyzes the power, starting a corresponding power regulating circuit according to the required pumping power; meanwhile, a starting command is sent to the excitation controller 50, and the excitation current and the excitation voltage of the pumped storage unit are adjusted through the excitation controller 50; the IGBT rectifier 31 of the power regulating circuit starts rectification after receiving the instruction, the IGBT inverter also synchronously works, inversion adjustment is carried out in a PWM (pulse width modulation) mode, the output frequency and the output power are gradually increased to required values, and the balance between the rotating speed of the unit, the output power and the power grid is achieved.
When the rated output power of each IGBT rectifier and IGBT inverter is 20MW, the method of regulating the power regulating circuit group is described as follows:
when the required pumping power is 90MW, 5 groups of power regulating circuits can be required through calculation, 4 groups of power regulating circuits work at full power, and the output of the rest 1 group is 10 MW.
If the required pumping power is changed to 95MW, the output of the rest 1 group is only required to be adjusted to 15MW, and the power of other 4 groups is not changed, so that the full-power work is continuously kept.
If the required pumping power is 110MW, 1 group of power regulating circuits needs to be added, 5 groups of power regulating circuits work at full power, and the output of the 6 th group, namely the rest 1 group, is 10 MW.
When the required pumping power is gradually reduced, the power of 1 group is reduced in the same way as the adjustment mode, if the requirement of reducing the power cannot be met, the power can be reduced group by group, and the rest groups still keep full-power operation.
The above control method can be called as: the N-1+1 mode is that: n-1 groups work at full power, and the last 1 group undertakes power regulation; by means of the control strategy, one part of the power regulating circuits works, the other part of the power regulating circuits stands by, and the working circuits can be periodically alternated and do not work in the fixed first groups or certain groups, so that all the devices of the power regulating circuits work alternately, and compared with the control method that all the devices work in an evenly distributed mode, the control method prolongs the service life of the devices.
In the embodiment of the invention, the output phase sequence of the IGBT inverter can be changed by adjusting the IGBT controller, so that a five-pole commutation switch is not required to be arranged in a primary loop of the pumped storage system to change the output phase sequence. In the embodiment of the invention, because the IGBT has the function of variable-frequency starting, an SFC variable-frequency pumping starting loop does not need to be additionally configured. In practical application, when the IGBT manufacturing technology is improved, the power commutation capacity and the operating voltage of the IGBT are also improved accordingly, and the number of power regulating circuit sets configured in the IGBT manufacturing technology can be reduced relatively.
According to the pumping power adjusting system and method based on IGBT control, disclosed by the embodiment of the invention, variable power adjustment of pumping working conditions is realized, the pumping power is balanced with the power of a power grid in a balanced manner during the adjustment of pumping power, the impact of unstable electric power such as wind, solar energy and the like on the power grid is reduced, and the frequency of the power grid can be kept stable no matter whether the wind is large or small or the solar energy is strong or weak.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (16)
1. The utility model provides a pumping power governing system based on IGBT control, its characterized in that, the system connect in power station monitored control system and pumped storage group, include: an IGBT controller and a power regulating circuit group; the power regulating circuit group comprises a plurality of groups of power regulating circuits; wherein,
the IGBT controller is used for receiving the pumped storage instruction output by the power station monitoring system, analyzing the pumped storage instruction and obtaining the required pumped power; starting N groups of power regulating circuits in the power regulating circuit group according to the pumping power, wherein N-1 groups of power regulating circuits perform full power output, and the rest 1 group of power regulating circuits perform power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power;
the power regulating circuit group is used for outputting the pumping power to the pumping energy storage unit, and the pumping energy storage unit performs pumping working condition operation according to the pumping power.
2. The system of claim 1, wherein the calculation method for starting the N groups of power conditioning circuits in the group of power conditioning circuits according to the pumping power is as follows:
wherein, P is the required pumping power, MW;
PMpower, MW, at full power output for a set of power conditioning circuits;
n is the number of groups of the power regulating circuit which is rounded up; wherein, N-1 groups of power regulating circuits carry out full power output, and the rest 1 group carries out power regulating output.
3. The system of claim 1, wherein each set of the power conditioning circuits comprises: an IGBT rectifier, a smoothing reactor and an IGBT inverter; the IGBT rectifier is connected with the smoothing reactor and the IGBT controller; the IGBT inverter is connected with the smoothing reactor and the IGBT controller; wherein,
the IGBT rectifier is used for rectifying alternating current into direct current;
the smoothing reactor is used for smoothing the direct current and reducing a direct current ripple factor;
the IGBT inverter is used for inverting the direct current into alternating current with variable power and frequency;
and the IGBT controller is used for controlling the working states of the IGBT rectifier and the IGBT inverter and adjusting the output power of the IGBT inverter by adopting a PWM (pulse width modulation) mode.
4. The system of claim 3, wherein the set of power conditioning circuits comprises 15 sets of power conditioning circuits.
5. The system of claim 4, wherein each IGBT rectifier has a rated output power of 20 MW; and the rated output power of each IGBT inverter is 20 MW.
6. The system of claim 3, wherein the set of power conditioning circuits further comprises: a converter transformer and a step-up transformer;
the converter transformer is connected with the IGBT rectifier and is used for reducing the voltage to the required working voltage of the IGBT rectifier;
the boosting transformer is connected with the IGBT inverter and the pumped storage unit and used for boosting the output voltage of the IGBT inverter to the rated voltage of the pumped storage unit.
7. The system of claim 3, wherein the set of power conditioning circuits further comprises: a plurality of converter transformers and a plurality of step-up transformers; wherein,
each converter transformer is respectively connected with one IGBT rectifier and is used for reducing the voltage to the required working voltage of the corresponding IGBT rectifier;
each step-up transformer is respectively connected with one IGBT inverter and the pumped storage unit and is used for stepping up the output voltage of the corresponding IGBT inverter to the rated voltage of the pumped storage unit.
8. The system of claim 1 wherein said power station monitoring system is connected to an RTU system, said RTU system in communication with a power dispatching system; wherein,
the power dispatching system generates an automatic control instruction according to power grid power data;
and the RTU system is used for receiving an automatic control instruction, generating a pumped storage instruction and sending the pumped storage instruction to the power station monitoring system.
9. The system of claim 1, wherein the RTU system is configured to receive manual control commands manually entered by personnel and generate the pumped storage commands for transmission to the power station monitoring system.
10. The system of claim 1, further comprising an excitation controller, wherein the excitation controller is connected to the IGBT controller and the pumped-hydro energy storage unit;
when the IGBT controller adjusts the output power of the power adjusting circuit group, the excitation controller is used for correspondingly adjusting the excitation current and the excitation voltage of the pumped storage unit, so that the pumped storage unit works stably.
11. A water pumping power adjusting method based on IGBT control is characterized in that,
acquiring a pumped storage instruction;
analyzing the pumped storage instruction to obtain the required pumped power;
starting N groups of power regulating circuits in the power regulating circuit group according to the pumping power, wherein N-1 groups of power regulating circuits carry out full power output, and the rest 1 groups of power regulating circuits carry out power regulating output, so that the output power of the N groups of power regulating circuits reaches the pumping power;
and the pumped storage unit operates under the pumping working condition according to the pumping power.
12. The method of claim 11, wherein the calculation method for starting the N groups of power adjusting circuits in the group of power adjusting circuits according to the set pumping power is as follows:
wherein, P is the required pumping power, MW;
PMpower, MW, at full power output for a set of power conditioning circuits;
n is the number of groups of the power regulating circuit which is rounded up; wherein, N-1 groups of power regulating circuits carry out full power output, and the rest 1 group carries out power regulating output.
13. The method of claim 12, wherein starting N groups of power conditioning circuits of the group of power conditioning circuits according to the pumping power, wherein N-1 groups of power conditioning circuits perform full power output and the remaining 1 group of power conditioning circuits perform power conditioning output, and wherein bringing the output power of the N groups of power conditioning circuits to the pumping power comprises:
and adjusting the output power of the power adjusting circuit by adopting a PWM (pulse width modulation) mode.
14. The method of claim 11, wherein obtaining the pumped-hydro energy storage command comprises: and generating an automatic control instruction according to the power grid power data, and generating the pumped storage instruction according to the automatic control instruction.
15. The method of claim 11, wherein obtaining the pumped-hydro energy storage command comprises: and the staff manually inputs a manual control instruction and generates the pumped storage instruction according to the manual control instruction.
16. The method of claim 11, further comprising: when the output power of the power regulating circuit group is regulated, the exciting current and the exciting voltage of the pumped storage unit are correspondingly regulated, so that the pumped storage unit works stably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310684969.0A CN103633667B (en) | 2013-12-13 | 2013-12-13 | A kind of draw water power regulating system and method controlled based on IGBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310684969.0A CN103633667B (en) | 2013-12-13 | 2013-12-13 | A kind of draw water power regulating system and method controlled based on IGBT |
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| CN103633667A true CN103633667A (en) | 2014-03-12 |
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| CN104410172A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Pumped storage system based on DC generator motor |
| CN104600726A (en) * | 2014-11-28 | 2015-05-06 | 国家电网公司 | Light-duty direct-current transmission based water pumping energy storage system |
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| CN101924508A (en) * | 2010-08-20 | 2010-12-22 | 上海交通大学 | Variable-frequency speed regulating system for starting high-power pumped storage unit |
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| CN101924508A (en) * | 2010-08-20 | 2010-12-22 | 上海交通大学 | Variable-frequency speed regulating system for starting high-power pumped storage unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410172A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Pumped storage system based on DC generator motor |
| CN104600726A (en) * | 2014-11-28 | 2015-05-06 | 国家电网公司 | Light-duty direct-current transmission based water pumping energy storage system |
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