CN103607032A - Renewable energy generating, power transmission and transformation and electrical network access integrated system - Google Patents
Renewable energy generating, power transmission and transformation and electrical network access integrated system Download PDFInfo
- Publication number
- CN103607032A CN103607032A CN201310589012.8A CN201310589012A CN103607032A CN 103607032 A CN103607032 A CN 103607032A CN 201310589012 A CN201310589012 A CN 201310589012A CN 103607032 A CN103607032 A CN 103607032A
- Authority
- CN
- China
- Prior art keywords
- voltage
- voltage side
- circuit
- low
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 230000009466 transformation Effects 0.000 title claims abstract description 17
- 238000010248 power generation Methods 0.000 claims abstract description 75
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims description 102
- 239000003990 capacitor Substances 0.000 claims description 87
- 230000002457 bidirectional effect Effects 0.000 claims description 15
- 238000004146 energy storage Methods 0.000 claims description 15
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 238000003491 array Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a renewable energy generating, power transmission and transformation and electrical network access integrated system, for the purpose of providing an access system capable of preventing impact or trawlnet caused to an electrical network. The technical scheme is as follows: the integrated system comprises renewable energy integrated generating units, at least one high voltage direct current transmission (HVDC) line, at least one inverter and a power generation field computer monitoring system, wherein the output end of each renewable energy integrated generating unit is connected with a high voltage direct current bus; one end of the HVDC line is connected with the high voltage direct current bus; the other end of the HVDC line is connected with the direct current input end of the large-power inverter; the alternating current output end of the large-power inverter is connected with an alternating current large electrical network; the power generation field computer monitoring system is connected with an electrical network dispatching control center and receives dispatching orders; and the power generation field computer monitoring system is also connected with the renewable energy integrated generating units and gives generating set values.
Description
Technical Field
The invention belongs to the technical field of new energy power generation and transmission, and particularly relates to an integrated system for generating, converting, storing energy, transmitting power and accessing a large alternating current power grid by using renewable energy (wind energy and solar energy).
Background
With the shortage of non-renewable energy sources such as petroleum, coal, natural gas and the like and the increasing severity of environmental pollution caused by the use of non-renewable energy sources, the development and utilization of renewable clean energy sources such as wind energy, solar energy and the like are more and more emphasized in various countries in the world, and the proportion of renewable energy sources in power generation is rapidly increased.
Generating power by wind energy:
the wind power plant for capturing wind energy, converting the wind energy into electric energy and sending the electric energy into a power grid through a power transmission line mainly comprises 5 parts: 1) a wind generating set (comprising a converter device); 2) a power frequency (50 Hz) step-up transformer of the wind generating set (the port low voltage of the wind driven generator is increased to the medium voltage: 10KV, 35 KV); 3) a current collecting circuit (for collecting the generated energy of the wind generating sets distributed and arranged); 4) wind farm boost substation (continue to boost voltage from medium to high: 110KV, 220 KV); 5) a high voltage transmission line.
Although wind power generation has been widely used, the following problems still remain: 1) wind power has obvious randomness and intermittence, generated electric energy is relatively unstable, and power grid load balance needs to be carried out by frequently adjusting the power generation output of other types of generating sets (such as thermal generating sets), so that the operating economy of the generating sets is greatly reduced; 2) the low voltage ride through capability of most wind turbines is low, and the wind turbines are easy to be off-grid when the system voltage is reduced due to the short circuit fault of a large power grid, so that strong impact is caused on the power grid, and great danger is formed on the safe and stable operation of the large power grid; 3) the construction cost of the offshore wind farm boosting transformer substation platform is high; 4) the capacity of the high-voltage submarine alternating-current cable is rapidly reduced along with the increase of the length due to the influence of the capacitor charging current; 5) the distance between a wind power plant and an alternating current large power grid is long, and the long-distance transmission capacity is greatly limited.
(II) solar power generation;
the high-capacity grid-connected solar photovoltaic power generation field mainly comprises the following 4 parts: 1) solar modules (photovoltaic arrays); 2) a photovoltaic inverter (DC/AC inverter, which inverts the direct current of the solar cell into alternating current) and its power frequency (50 Hz) step-up transformer; 3) photovoltaic farm step-up substations (step-up of voltage to medium or high voltage: 35KV, 110KV, 220 KV); 4) a high voltage transmission line.
Similar to wind power generation, solar photovoltaic power generation has the following problems: 1) the solar power generation field is greatly influenced by seasons, day and night and weather, has remarkable randomness and intermittence, generates relatively unstable electric energy, needs to carry out power grid load balance by frequently adjusting the power generation output of other types of generating sets (such as a thermal generating set), and greatly reduces the economical efficiency of the operation of the generating sets; 2) the low voltage ride through capability of some photovoltaic inverters is low, and the photovoltaic inverters are easy to be disconnected when the system voltage is reduced due to the short circuit fault of a large power grid, so that strong impact is caused on the power grid, and great danger is formed on the safe and stable operation of the large power grid; 3) and the distance between a large-capacity solar power generation field and an alternating current large power grid is relatively long, and the long-distance transmission capacity is greatly limited.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the background technology, and provide a renewable energy power generation, power transmission and transformation and power grid access integrated system, which has high reliability, can avoid impact or trawling to a power grid, and has the characteristics of simple structure and lower cost.
The technical scheme adopted by the invention is as follows:
the renewable energy power generation, power transmission and transformation and power grid access integrated system comprises a plurality of renewable energy integrated power generation units, at least one high-voltage direct-current power transmission line, at least one high-power inverter and a power generation field computer monitoring system; the method is characterized in that: the output end of each renewable energy source integrated power generation unit is connected to a high-voltage direct current bus, one end of a high-voltage direct current transmission line is also connected to a high-voltage direct current bus HVDC, the other end of the high-voltage direct current transmission line is connected to the direct current input end of a high-power inverter, and the alternating current output end of the high-power inverter is connected to an alternating current large power grid; the power plant computer monitoring system is connected with the power grid dispatching control center and receives dispatching commands of the power grid dispatching control center, and is also connected with the renewable energy integrated power generation unit and sends power generation set values to the renewable energy integrated power generation unit.
The renewable energy integrated power generation unit comprises a renewable energy power generation device, a modularized high-power electromagnetic isolation type DC/DC variable current boosting device, an energy storage device and a unit controller; the output end of the renewable energy power generation device is connected to a low-voltage direct-current bus LVDC, the output end of the energy storage device is also connected to the same low-voltage direct-current bus LVDC, the low-voltage side of the modularized high-power electromagnetic isolation type DC/DC variable-current boosting device is also connected to the same low-voltage direct-current bus LVDC, the high-voltage side of the modularized high-power electromagnetic isolation type DC/DC variable-current boosting device is connected to a high-voltage direct-current bus HVDC of a power generation field, and the unit controller is connected with the renewable energy power generation device, the modularized.
The renewable energy power generation device is at least one of at least one photovoltaic cell array, at least one asynchronous wind driven generator with a three-phase or multiphase active PWM rectification circuit based on an IGBT module, at least one permanent magnet direct-drive wind driven generator with a rectification circuit and at least one synchronous wind driven generator with a rectification circuit;
the output ends of the photovoltaic cell arrays are connected to a low-voltage direct current bus LVDC;
the alternating current output end of the asynchronous wind driven generator is connected with the alternating current input end of a three-phase or multi-phase active PWM rectifying circuit corresponding to the asynchronous wind driven generator, and the direct current output end of the three-phase or multi-phase active PWM rectifying circuit is connected to the low-voltage direct current bus LVDC;
the alternating current input end of the permanent magnet direct-drive wind driven generator is connected with the alternating current input end of a rectifying circuit corresponding to the permanent magnet direct-drive wind driven generator, and the direct current output end of the rectifying circuit is connected to the low-voltage direct current bus LVDC;
the alternating current output end of the synchronous wind driven generator is connected with the alternating current input end of a rectifying circuit corresponding to the synchronous wind driven generator, and the direct current output end of the rectifying circuit is connected to the low-voltage direct current bus LVDC;
the rectification circuit of the permanent magnet direct-drive wind driven generator or the rectification circuit of the synchronous wind driven generator is in one of the following forms:
1) the rectifying circuit is a diode rectifying circuit;
2) the rectifying circuit is a diode rectifying circuit and a Boost circuit;
3) the rectifying circuit is a diode rectifying circuit and a PFC circuit;
4) the rectification circuit is a three-phase or multi-phase active PWM rectification circuit based on an IGBT module.
The unit controller comprises a microprocessor unit, a signal acquisition circuit and a communication module, wherein the signal acquisition circuit and the communication module are connected with the microprocessor unit; the signal acquisition circuit is connected with the renewable energy power generation device, the modularized high-power electromagnetic isolation type DC/DC variable current boosting device and the energy storage device to acquire analog and digital variables, and the communication module is connected with the computer monitoring system of the power generation field.
The energy storage device comprises a non-electromagnetic isolation type bidirectional DC/DC converter and a super capacitor system, or a non-electromagnetic isolation type bidirectional DC/DC converter and a storage battery system; one end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with the low-voltage direct current bus LVDC, and the other end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with the storage battery system or the super capacitor system.
The non-electromagnetic isolation type bidirectional DC/DC converter comprises a reactor L, a capacitor C, two IGBT or MOSFET modules T1 and T2, and two diodes D1 and D2; wherein,
the IGBT or MOSFET module T1, the diode D2, the reactor L and the capacitor C form a BUCK circuit;
the IGBT or MOSFET module T2, the diode D1, the reactor L, and the capacitor C form a BOOST circuit.
The modularized high-power electromagnetic isolation type DC/DC conversion and boosting device comprises a plurality of identical electromagnetic isolation type DC/DC converters, the input ends of all the electromagnetic isolation type DC/DC converters are connected in parallel and then connected to a low-voltage direct-current bus LVDC in a renewable energy integrated power generation unit, and the output ends of all the electromagnetic isolation type DC/DC converters are connected in series or in parallel and then connected to a high-voltage direct-current bus HVDC.
The structure of the electromagnetic isolation type DC/DC converter is one of the following forms:
1) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LC series resonance circuit composed of an inductor Lr and a capacitor Cr, a high-frequency transformer with multiple secondary coils and multiple high-voltage side rectifying circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and an output filter circuit at the direct current side of the diode full-bridge rectifying circuit, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to the low-voltage direct current bus LVDC, and the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected with the LC series resonance circuit in series;
the alternating current input end of each high-voltage side rectifying circuit is connected with the secondary coil of the corresponding high-frequency transformer, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter;
2) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or MOSFET and a direct-current capacitor thereof, an LLC resonance circuit composed of an inductor Lr, an inductor Lm and a capacitor Cr, a high-frequency transformer with multiple secondary coils and multiple high-voltage side rectification circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to a low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor Lr and a capacitor Cr in an LLC resonance circuit, and an inductor Lm in the LLC resonance circuit is connected in parallel with the primary coil of the high-frequency transformer;
the alternating current input ends of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the alternating current input ends, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
3) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LCC resonance circuit composed of an inductor Lr, a capacitor Cp and a capacitor Cr, a high-frequency transformer with multiple secondary coils and a plurality of high-voltage side rectifying circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to a low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor Lr and a capacitor Cr in an LCC resonant circuit, and a capacitor Cp in the LCC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the alternating current input ends of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the alternating current input ends, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
4) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LC series resonance circuit composed of an inductor Lr and a capacitor Cr, a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to the low-voltage direct current bus LVDC, and the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected with the LC series resonance circuit in series;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
5) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or MOSFET and a direct-current capacitor thereof, an LLC resonance circuit composed of an inductor Lr, an inductor Lm and a capacitor Cr, a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to a low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor Lr and a capacitor Cr in an LLC resonance circuit, and an inductor Lm in the LLC resonance circuit is connected in parallel with the primary coil of the high-frequency transformer;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
6) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LCC resonance circuit composed of an inductor Lr, a capacitor Cp and a capacitor Cr, a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to a low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor Lr and a capacitor Cr in an LLC resonant circuit, and a capacitor Cp in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter.
The high-power inverter is a current source type inverter or a voltage source type inverter with a direct current end connected with a diode check valve in series.
The inductor Lr is an independent inductor element or the leakage inductance of the high-frequency transformer; the other inductor Lm is a separate inductive element, or an exciting inductor of the high-frequency transformer.
The invention has the beneficial effects that: the renewable energy source (wind energy and solar energy) power generation device is implemented through a modularized high-power electromagnetic isolation type DC/DC variable current boosting device based on a high-frequency technology: after current transformation, electromagnetic isolation and voltage boosting, the generated electric energy is directly input into an alternating current large power grid through a direct current transmission line and an alternating current grid side inverter; in addition, an energy storage device with certain capacity is configured on the low-voltage direct current side so as to improve the adjustability of the renewable energy power generation plan; compared with the traditional renewable energy (wind energy and solar energy) power plant and the transmission system thereof, the invention adopts the direct current transmission technology to transmit the generated electric energy to the alternating current large power grid, and the renewable energy (wind energy and solar energy) power plant does not need to: 1) a power frequency step-up transformer; 2) a power frequency inverter; 3) power plant power transmission and transformation equipment (main transformers, circuit breakers, etc.).
Therefore, the technology of the invention greatly improves the adjustability of the power generation plan of renewable energy sources (wind energy and solar energy), the electric energy transmission capability and the low voltage ride through capability, increases the reliability, improves the electric energy quality, saves a large amount of raw materials (silicon steel sheets and copper wires) and reduces the overall cost. Particularly, when the method is applied to offshore wind power generation projects, the volume and the weight of the step-up transformer are greatly reduced due to the fact that a high-frequency transformer is adopted in the DC/DC converter for step-up and isolation technology, and therefore construction cost of an offshore platform (foundation) of a wind turbine and an offshore platform of a wind farm step-up transformer substation can be greatly saved.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Fig. 2a and 2b are circuit configuration diagrams of the "renewable energy integrated power generation unit" in fig. 1.
Fig. 3a and 3b are schematic circuit structures of the "modular high-power electromagnetic isolation type DC/DC converter-booster device" in fig. 2a and 2 b.
Fig. 4a is a circuit diagram of one of the embodiments of the electromagnetically isolated DC/DC converter of fig. 3a and 3 b.
Fig. 4b is a circuit diagram of a second embodiment of the electromagnetically isolated DC/DC converter of fig. 3a and 3 b.
Fig. 4c is a circuit diagram of a third embodiment of the electromagnetically isolated DC/DC converter of fig. 3a and 3 b.
Fig. 4d is a circuit diagram of four of the embodiments of the "electromagnetically isolated DC/DC converter" of fig. 3a and 3 b.
Fig. 4e is a circuit diagram of five embodiments of the "electromagnetically isolated DC/DC converter" of fig. 3a and 3 b.
Fig. 4f is a circuit diagram of six of the "electromagnetically isolated DC/DC converter" embodiments of fig. 3a and 3 b.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following examples.
As shown in fig. 1, the renewable energy power generation, power transmission and transformation and power grid access integrated system comprises a plurality of renewable energy integrated power generation units 1, at least one high-voltage direct-current transmission line 2, at least one high-power inverter 3 and a power plant computer monitoring system 4. The output end of each renewable energy source integrated power generation unit is high-voltage direct current and is connected in parallel to the same high-voltage direct current bus HVDC; one end of the high-voltage direct current transmission line is also connected with the same high-voltage direct current bus HVDC, the other end of the high-voltage direct current transmission line is connected to the direct current input end of the high-power inverter, and the alternating current output end of the high-power inverter is connected to the alternating current large power grid. The high-power inverter has the function of converting direct current into alternating current and then sending the alternating current to an alternating current large power grid, and can adopt a current source type inverter or a voltage source type inverter with a direct current end connected with a diode check valve in series; the function of the diode check valve is to prevent the AC large power grid from injecting fault current to the DC side when the DC transmission line has short-circuit fault.
The power plant computer monitoring system 4 (conventional monitoring system) is connected with the power grid dispatching control center, monitors the state of each device in the power plant in real time, receives the dispatching command of the power grid dispatching control center, and sends a power generation set value to the renewable energy integrated power generation unit. And the electricity generated by the renewable energy integrated power generation unit is transmitted to a large alternating current power grid through the high-voltage direct current transmission line and the high-power inverter.
Fig. 2a and 2b are circuit configuration diagrams of the renewable energy integrated power generation unit in fig. 1, which includes: the system comprises one or more renewable energy power generation devices, a modularized high-power electromagnetic isolation type DC/DC conversion boosting device, an energy storage device and a unit controller. The output end of the renewable energy power generation device is connected to the low-voltage direct current bus LVDC; the output of the energy storage device is also connected to the same low-voltage direct current bus LVDC; the low-voltage side of the modularized high-power electromagnetic isolation type DC/DC converting and boosting device is also connected to the same low-voltage direct current bus LVDC, and the high-voltage side of the modularized high-power electromagnetic isolation type DC/DC converting and boosting device is connected to a high-voltage bus HVDC of a power generation field.
The renewable energy power generation device is one or a combination of at least two of the following forms:
1) the renewable energy generation device is one or more photovoltaic cell arrays (fig. 2 b);
2) the renewable energy power generation device is one or more asynchronous wind generators with three-phase or multiphase PWM active rectification circuit based on IGBT modules (fig. 2 a):
3) the renewable energy power generation device is one or more permanent magnet direct-drive wind driven generators with rectification circuits;
4) the renewable energy power generation device is one or more synchronous wind power generators with rectification circuits.
The rectifying circuit of the permanent magnet direct-drive wind driven generator can be a conventional diode rectifying circuit; or a conventional diode rectifying circuit and a Boost circuit are added; or a conventional diode rectifying circuit and a PFC circuit; or a three-phase or multi-phase PWM active rectifying circuit based on an IGBT module (the three-phase or multi-phase PWM active rectifying circuit is a conventional rectifying circuit and is not described in detail).
The rectifying circuit of the synchronous wind driven generator can be a conventional diode rectifying circuit; or a conventional diode rectifying circuit and a Boost circuit are added; or a conventional diode rectifying circuit and a PFC circuit; or a three-phase or multi-phase PWM active rectifying circuit based on an IGBT module (the three-phase or multi-phase PWM active rectifying circuit is a conventional rectifying circuit and is not described in detail).
And the output ends of the photovoltaic cell arrays are connected to a low-voltage direct current bus LVDC. The alternating current output end of the asynchronous wind driven generator (or the permanent magnet direct-drive wind driven generator or the synchronous wind driven generator) is connected with the alternating current input end of the corresponding rectifying circuit, and the direct current output end of the rectifying circuit is connected to the low-voltage direct current bus LVDC.
The energy storage device of fig. 2a and 2b comprises a non-electromagnetic isolated bidirectional DC/DC converter (commercially available), a super capacitor system (commercially available); or the energy storage device comprises a non-electromagnetic isolation type bidirectional DC/DC converter and a storage battery system (obtained by outsourcing). One end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with the low-voltage direct current bus LVDC, and the other end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with the storage battery system or the super capacitor system.
The non-electromagnetic isolation type bidirectional DC/DC converter comprises a reactor L, a capacitor C, two IGBT or MOSFET modules T1 and T2; two diodes D1, D2. The IGBT or MOSFET module T1, the diode D2, the reactor L and the capacitor C form a typical BUCK circuit, and a low-voltage direct-current bus LVDC charges a storage battery system (or a super capacitor system) when the circuit works; the IGBT or MOSFET module T2, the diode D1, the reactor L, and the capacitor C form a typical BOOST circuit, and the battery system (or super capacitor system) discharges to the low-voltage dc bus LVDC during operation.
The unit controller (commercially available) of fig. 2a and 2b comprises a microprocessor unit and a signal acquisition circuit, a communication module connected thereto. The signal acquisition circuit is connected with the renewable energy power generation device, the modularized high-power electromagnetic isolation type DC/DC variable current and voltage boosting device and the energy storage device and is used for acquiring analog and digital variables in the renewable energy integrated power generation unit; the communication module is connected with the power generation field computer monitoring system and is responsible for the function of communication with the power generation field computer monitoring system; and the microprocessor unit is used for outputting a control signal to control the modularized high-power electromagnetic isolation type DC/DC variable current boosting device and the energy storage device after calculating and processing the signals obtained by sampling and a power generation set value issued by a power generation field computer monitoring system. A maximum power tracking (MPPT) function of the photovoltaic power generation device is also implemented in the controller.
As shown in fig. 3a and 3b, the modular high-power electromagnetic isolation type DC/DC converter/booster apparatus is composed of a plurality of identical electromagnetic isolation type DC/DC converters, and mainly functions to boost a low direct-current voltage to a high direct-current voltage and electromagnetically isolate a high-voltage and a low-voltage direct-current system. The input ends of all the electromagnetic isolation type DC/DC converters are connected in parallel and then connected to a low-voltage direct current bus LVDC in the renewable energy integrated power generation unit; the output ends of all the electromagnetic isolation type DC/DC converters have the following two structures: 1) all the electromagnetic isolation type DC/DC converters are connected in series and then connected to a high-voltage direct current bus HVDC (figure 3 a); 2) the output ends of all the electromagnetic isolation type DC/DC converters are connected in parallel and then connected to a high-voltage direct current bus HVDC (fig. 3 b).
The electromagnetic isolation type DC/DC converter has the following embodiment 6:
the first embodiment is as follows: as shown in fig. 4a, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter composed of IGBTs or MOSFETs and its DC capacitor, an LC series resonant circuit composed of an inductor Lr and a capacitor Cr, a multi-secondary-winding high-frequency transformer, and a plurality of high-voltage side rectifying circuits. The high-voltage side rectifying circuit is composed of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit can be a capacitor or an LC filter circuit. The inductance Lr may be a single inductance element or may be a leakage inductance of the high-frequency transformer; the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to the low-voltage direct current bus LVDC, and the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected with the LC series resonance circuit in series. The input end (ac end) of the high-voltage side rectifier circuit is connected to the secondary coil of the high-frequency transformer corresponding thereto. The output ends (direct current ends) of the high-voltage side rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter.
Example two: as shown in fig. 4b, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter composed of IGBTs or MOSFETs and its DC capacitor, an LLC resonant circuit composed of an inductor Lr, an inductor Lm and a capacitor Cr, a multi-secondary-coil high-frequency transformer, and a plurality of high-voltage side rectifying circuits. The high-voltage side rectifying circuit is composed of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit can be a capacitor or an LC filter circuit. The inductor Lr may be a separate inductor element or a leakage inductance of the high-frequency transformer, and the other inductor Lm may be a separate inductor element or an excitation inductance of the high-frequency transformer. The direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with the low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected in series with the inductor Lr and the capacitor Cr in the LLC resonant circuit, and the inductor Lm in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer. The input ends (alternating current ends) of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side rectifying circuits, and the output ends (direct current ends) of the high-voltage side rectifying circuits are cascaded to be used as the output ends of the electromagnetic isolation type DC/DC converter.
Example three: as shown in fig. 4c, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter formed by IGBT or MOSFET and its DC capacitor, an LCC resonant circuit formed by an inductor Lr, a capacitor Cp and a capacitor Cr, a multi-secondary-winding high-frequency transformer, and a plurality of high-voltage side rectifying circuits. The high-voltage side rectifying circuit is composed of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit can be a capacitor or an LC filter circuit. The inductor Lr may be a separate inductor element, or may be a leakage inductance of the high-frequency transformer. The direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with the low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected in series with the inductor Lr and the capacitor Cr in the LCC resonant circuit, and the capacitor Cp in the LCC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer. The input ends (alternating current ends) of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side rectifying circuits, and the output ends (direct current ends) of the high-voltage side rectifying circuits are cascaded to be used as the output ends of the electromagnetic isolation type DC/DC converter.
Example four: as shown in fig. 4d, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter formed by IGBT or MOSFET and its DC capacitor, an LC series resonant circuit formed by an inductor Lr and a capacitor Cr, a multi-secondary-winding high-frequency transformer, and a plurality of high-voltage side voltage-doubling rectifying circuits. The inductor Lr may be a separate inductor element, or may be a leakage inductance of the high-frequency transformer. The direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel to the low-voltage direct current bus LVDC, and the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected with the LC series resonance circuit in series. The input end of the high-voltage side voltage-doubling rectifying circuit is connected with the secondary coil of the high-frequency transformer corresponding to the high-voltage side voltage-doubling rectifying circuit. The output ends (direct current ends) of the multiple high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter.
Example five: as shown in fig. 4e, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter formed by IGBT or MOSFET and its DC capacitor, an LLC resonant circuit formed by an inductor Lr, an inductor Lm and a capacitor Cr, a high-frequency transformer with multiple secondary windings, and multiple high-voltage side voltage-doubling rectifying circuits. The direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with the low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected in series with the inductor Lr and the capacitor Cr in the LLC resonant circuit, and the inductor Lm in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer. The inductor Lr may be a separate inductor element or a leakage inductance of the high-frequency transformer, and the other inductor Lm may be a separate inductor element or an excitation inductance of the high-frequency transformer. The input end (ac end) of the high-voltage side voltage-doubling rectifying circuit is connected to the secondary coil of the high-frequency transformer corresponding thereto. The output ends (direct current ends) of the multiple high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter.
Example six: as shown in fig. 4f, the electromagnetic isolation type DC/DC converter includes a low-voltage side full bridge inverter formed by IGBT or MOSFET and its DC capacitor, an LCC resonant circuit formed by an inductor Lr, a capacitor Cp and a capacitor Cr, a high-frequency transformer with multiple secondary windings, and multiple high-voltage side voltage-doubling rectifying circuits. The inductor Lr may be a separate inductor element, or may be a leakage inductance of the high-frequency transformer. The direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with the low-voltage direct current bus LVDC, the alternating current end of the low-voltage side full-bridge inverter is connected with the primary coil of the high-frequency transformer after being connected in series with the inductor Lr and the capacitor Cr in the LLC resonant circuit, and the capacitor Cp in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer. The input end (ac end) of the high-voltage side voltage-doubling rectifying circuit is connected to the secondary coil of the high-frequency transformer corresponding thereto. The output ends (direct current ends) of the multiple high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter.
All electronic components and electronic equipment in the invention can be purchased.
Claims (10)
1. The renewable energy power generation, power transmission and transformation and power grid access integrated system comprises a plurality of renewable energy integrated power generation units (1), at least one high-voltage direct-current transmission line (2), at least one high-power inverter (3) and a power generation field computer monitoring system (4); the method is characterized in that: the output end of each renewable energy integrated power generation unit (1) is connected to a high-voltage direct current bus (HVDC), one end of a high-voltage direct current transmission line (2) is also connected to the high-voltage direct current bus (HVDC), the other end of the high-voltage direct current transmission line (2) is connected to the direct current input end of a high-power inverter (3), and the alternating current output end of the high-power inverter (3) is connected to an alternating current large power grid; the power plant computer monitoring system (4) is connected with the power grid dispatching control center (5) and receives dispatching commands of the power grid dispatching control center, and the power plant computer monitoring system (4) is also connected with the renewable energy integrated power generation unit (1) and sends power generation set values to the renewable energy integrated power generation unit (1).
2. The integrated renewable energy power, transmission and transformation, and grid access system of claim 1, wherein: the renewable energy integrated power generation unit comprises a renewable energy power generation device, a modularized high-power electromagnetic isolation type DC/DC variable current boosting device, an energy storage device and a unit controller; the output end of the renewable energy power generation device is connected to a low-voltage direct-current bus (LVDC), the output end of the energy storage device is also connected to the same low-voltage direct-current bus (LVDC), the low-voltage side of the modularized high-power electromagnetic isolation type DC/DC current-converting and voltage-boosting device is also connected to the same low-voltage direct-current bus (LVDC), the high-voltage side of the modularized high-power electromagnetic isolation type DC/DC current-converting and voltage-boosting device is connected to a high-voltage direct-current bus (HVDC) of a power generation field, and the unit controller is connected with the renewable energy power generation device.
3. The integrated renewable energy power, transmission and transformation, and grid access system of claim 2, wherein: the renewable energy power generation device is at least one of at least one photovoltaic cell array, at least one asynchronous wind driven generator with a three-phase or multiphase active PWM rectification circuit based on an IGBT module, at least one permanent magnet direct-drive wind driven generator with a rectification circuit and at least one synchronous wind driven generator with a rectification circuit;
the output ends of the photovoltaic cell arrays are connected to a low voltage direct current bus (LVDC);
the alternating current output end of the asynchronous wind driven generator is connected with the alternating current input end of a three-phase or multi-phase active PWM rectifying circuit corresponding to the asynchronous wind driven generator, and the direct current output end of the three-phase or multi-phase active PWM rectifying circuit is connected to a low-voltage direct current bus (LVDC);
the alternating current input end of the permanent magnet direct-drive wind driven generator is connected with the alternating current input end of a rectifying circuit corresponding to the permanent magnet direct-drive wind driven generator, and the direct current output end of the rectifying circuit is connected to a low-voltage direct current bus (LVDC);
the alternating current output end of the synchronous wind driven generator is connected with the alternating current input end of a rectifying circuit corresponding to the synchronous wind driven generator, and the direct current output end of the rectifying circuit is connected to a low-voltage direct current bus (LVDC);
the rectification circuit of the permanent magnet direct-drive wind driven generator or the rectification circuit of the synchronous wind driven generator is in one of the following forms:
1) the rectifying circuit is a diode rectifying circuit;
2) the rectifying circuit is a diode rectifying circuit and a Boost circuit;
3) the rectifying circuit is a diode rectifying circuit and a PFC circuit;
4) the rectification circuit is a three-phase or multi-phase active PWM rectification circuit based on an IGBT module.
4. The integrated renewable energy power, transmission and transformation, and grid access system of claim 3, wherein: the unit controller comprises a microprocessor unit, a signal acquisition circuit and a communication module, wherein the signal acquisition circuit and the communication module are connected with the microprocessor unit; the signal acquisition circuit is connected with the renewable energy power generation device, the modularized high-power electromagnetic isolation type DC/DC variable current boosting device and the energy storage device to acquire analog and digital variables, and the communication module is connected with the computer monitoring system of the power generation field.
5. The integrated renewable energy power, transmission and transformation, and grid access system of claim 4, wherein: the energy storage device comprises a non-electromagnetic isolation type bidirectional DC/DC converter and a super capacitor system, or a non-electromagnetic isolation type bidirectional DC/DC converter and a storage battery system; one end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with a low-voltage direct current bus (LVDC), and the other end of the non-electromagnetic isolation type bidirectional DC/DC converter is connected with a storage battery system or a super capacitor system.
6. The integrated renewable energy power, transmission and transformation, and grid access system of claim 5, wherein: the non-electromagnetic isolation type bidirectional DC/DC converter comprises a reactor (L), a capacitor (C), two IGBT or MOSFET modules (T1, T2) and two diodes (D1, D2); wherein,
the IGBT or MOSFET module (T1), the diode (D2), the reactor (L) and the capacitor (C) form a BUCK circuit;
the IGBT or MOSFET module (T2), the diode (D1), the reactor (L) and the capacitor (C) form a BOOST circuit.
7. The integrated renewable energy power, transmission and grid access system according to any one of claims 2 to 6, wherein: the modularized high-power electromagnetic isolation type DC/DC conversion and boosting device comprises a plurality of identical electromagnetic isolation type DC/DC converters, wherein the input ends of all the electromagnetic isolation type DC/DC converters are connected in parallel and then connected to a low-voltage direct current bus (LVDC) in a renewable energy integrated power generation unit, and the output ends of all the electromagnetic isolation type DC/DC converters are connected in series or in parallel and then connected to a high-voltage direct current bus (HVDC).
8. The integrated renewable energy power, transmission and transformation, and grid access system of claim 7, wherein: the structure of the electromagnetic isolation type DC/DC converter is one of the following forms:
1) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of IGBTs or MOSFETs, a direct-current capacitor of the low-voltage side full-bridge inverter, an LC series resonance circuit composed of an inductor (Lr) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and a plurality of high-voltage side rectifying circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and an output filter circuit at the direct current side of the diode full-bridge rectifying circuit, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), and the alternating current end of the low-voltage side full-bridge inverter is connected with an LC series resonance circuit in series and then is connected with a primary coil of a high-frequency transformer;
the alternating current input end of each high-voltage side rectifying circuit is connected with the secondary coil of the corresponding high-frequency transformer, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output end of the electromagnetic isolation type DC/DC converter;
2) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or MOSFET and a direct-current capacitor thereof, an LLC resonance circuit composed of an inductor (Lr), an inductor (Lm) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and a plurality of high-voltage side rectification circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected with an inductor (Lr) and a capacitor (Cr) in an LLC resonant circuit in series, and an inductor (Lm) in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the alternating current input ends of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the alternating current input ends, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
3) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LCC resonance circuit composed of an inductor (Lr), a capacitor (Cp) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and a plurality of high-voltage side rectifying circuits;
the high-voltage side rectifying circuit consists of a diode full-bridge rectifying circuit and a direct-current side output filter circuit thereof, and the output filter circuit is a capacitor or an LC filter circuit;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor (Lr) and a capacitor (Cr) in an LCC resonant circuit, and a capacitor (Cp) in the LCC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the alternating current input ends of the high-voltage side rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the alternating current input ends, and the direct current output ends of all the high-voltage side rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
4) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LC series resonance circuit composed of an inductor (Lr) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), and the alternating current end of the low-voltage side full-bridge inverter is connected with an LC series resonance circuit in series and then is connected with a primary coil of a high-frequency transformer;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
5) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or MOSFET and a direct-current capacitor thereof, an LLC resonance circuit composed of an inductor (Lr), an inductor (Lm) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected with an inductor (Lr) and a capacitor (Cr) in an LLC resonant circuit in series, and an inductor (Lm) in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter;
6) the electromagnetic isolation type DC/DC converter comprises a low-voltage side full-bridge inverter composed of an IGBT or an MOSFET, a direct-current capacitor of the low-voltage side full-bridge inverter, an LCC resonance circuit composed of an inductor (Lr), a capacitor (Cp) and a capacitor (Cr), a high-frequency transformer with multiple secondary coils and multiple high-voltage side voltage-multiplying rectification circuits;
the direct current end of the low-voltage side full-bridge inverter is used as the input end of the electromagnetic isolation type DC/DC converter and is connected in parallel with a low-voltage direct current bus (LVDC), the alternating current end of the low-voltage side full-bridge inverter is connected with a primary coil of a high-frequency transformer after being connected in series with an inductor (Lr) and a capacitor (Cr) in an LLC resonant circuit, and a capacitor (Cp) in the LLC resonant circuit is connected in parallel with the primary coil of the high-frequency transformer;
the input ends of the high-voltage side voltage-multiplying rectifying circuits are connected with the secondary coils of the high-frequency transformers corresponding to the high-voltage side voltage-multiplying rectifying circuits, and the direct-current output ends of all the high-voltage side voltage-multiplying rectifying circuits are cascaded and then serve as the output ends of the electromagnetic isolation type DC/DC converter.
9. The integrated renewable energy power, transmission and transformation, and grid access system of claim 8, wherein: the high-power inverter is a current source type inverter or a voltage source type inverter with a direct current end connected with a diode check valve in series.
10. The integrated renewable energy power, transmission and transformation, and grid access system of claim 9, wherein: the inductor (Lr) is a separate inductor element or a leakage inductance of the high-frequency transformer; the other inductor (Lm) is a separate inductive element or an exciting inductor of the high-frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589012.8A CN103607032B (en) | 2013-11-20 | 2013-11-20 | Renewable energy power generation, power transmission and transformation and electrical network access integral system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589012.8A CN103607032B (en) | 2013-11-20 | 2013-11-20 | Renewable energy power generation, power transmission and transformation and electrical network access integral system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103607032A true CN103607032A (en) | 2014-02-26 |
| CN103607032B CN103607032B (en) | 2016-08-17 |
Family
ID=50125237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310589012.8A Expired - Fee Related CN103607032B (en) | 2013-11-20 | 2013-11-20 | Renewable energy power generation, power transmission and transformation and electrical network access integral system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103607032B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986330A (en) * | 2014-05-28 | 2014-08-13 | 东南大学 | Resonance boost DC/DC converter and control method thereof suitable for high-voltage and high-power occasions |
| CN104135157A (en) * | 2014-07-07 | 2014-11-05 | 中国电子科技集团公司第四十一研究所 | Power conversion circuit of high-voltage power supply |
| CN104242433A (en) * | 2014-09-22 | 2014-12-24 | 安徽启光能源科技研究院有限公司 | Energy management system for mixed energy source power station |
| CN104269843A (en) * | 2014-10-29 | 2015-01-07 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner power supply circuit and photovoltaic air conditioner |
| CN104600749A (en) * | 2015-02-06 | 2015-05-06 | 中国科学院广州能源研究所 | Microgrid layered and synchronous control method |
| CN106160022A (en) * | 2015-03-31 | 2016-11-23 | 积能环保电机工程科技有限公司 | Direct current multivoltage electrical power trans mission/distribution system |
| CN106797181A (en) * | 2014-07-17 | 2017-05-31 | Abb瑞士股份有限公司 | For the power converter system of regenerative resource |
| CN107492904A (en) * | 2017-07-11 | 2017-12-19 | 珠海光普海洋生态科技有限公司 | Power grid system for intelligent power generation and supply of wind energy and solar energy |
| CN108561278A (en) * | 2018-04-09 | 2018-09-21 | 江苏艮德电力设备有限公司 | A kind of wind power plant computer supervisory control system |
| CN108832890A (en) * | 2018-07-30 | 2018-11-16 | 浙江人和光伏科技有限公司 | A kind of photovoltaic component terminal box rapidly switched off |
| CN109490004A (en) * | 2018-12-29 | 2019-03-19 | 珠海九源电力电子科技有限公司 | A kind of symmetrical expression electromagnetic drive experimental system and control method |
| CN110352554A (en) * | 2017-01-05 | 2019-10-18 | 通用电气公司 | Power converter for energy system |
| CN111490553A (en) * | 2020-04-29 | 2020-08-04 | 清华-伯克利深圳学院筹备办公室 | Active power balancing device for micro-grid and control method thereof |
| CN112531779A (en) * | 2020-12-07 | 2021-03-19 | 国网新疆电力有限公司昌吉供电公司 | Multi-area power grid connection method |
| CN113258801A (en) * | 2020-02-12 | 2021-08-13 | 新疆金风科技股份有限公司 | Direct current gets electric installation, system and wind generating set's start control system |
| TWI800119B (en) * | 2021-11-25 | 2023-04-21 | 應能科技股份有限公司 | solar energy conversion system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001052379A2 (en) * | 1999-12-23 | 2001-07-19 | Abb Ab | Electric power system based on renewable energy sources |
| US20050284673A1 (en) * | 2004-06-08 | 2005-12-29 | Yosuke Nakazawa | Power source device for a vehicle |
| CN102623986A (en) * | 2011-01-28 | 2012-08-01 | 科孚德机电技术有限公司 | Power collection and transmission system |
| CN102709936A (en) * | 2012-05-15 | 2012-10-03 | 江苏固德威电源科技有限公司 | Multi-level photovoltaic grid-connected inverter with isolation transformer |
| CN103219740A (en) * | 2012-01-18 | 2013-07-24 | 同济大学 | Grid connecting system of permanent magnet synchronous wind driven generator |
| CN203589824U (en) * | 2013-11-20 | 2014-05-07 | 梁一桥 | Renewable energy power generation, power transmission and transformation and power grid access integration system |
-
2013
- 2013-11-20 CN CN201310589012.8A patent/CN103607032B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001052379A2 (en) * | 1999-12-23 | 2001-07-19 | Abb Ab | Electric power system based on renewable energy sources |
| US20050284673A1 (en) * | 2004-06-08 | 2005-12-29 | Yosuke Nakazawa | Power source device for a vehicle |
| CN102623986A (en) * | 2011-01-28 | 2012-08-01 | 科孚德机电技术有限公司 | Power collection and transmission system |
| CN103219740A (en) * | 2012-01-18 | 2013-07-24 | 同济大学 | Grid connecting system of permanent magnet synchronous wind driven generator |
| CN102709936A (en) * | 2012-05-15 | 2012-10-03 | 江苏固德威电源科技有限公司 | Multi-level photovoltaic grid-connected inverter with isolation transformer |
| CN203589824U (en) * | 2013-11-20 | 2014-05-07 | 梁一桥 | Renewable energy power generation, power transmission and transformation and power grid access integration system |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986330A (en) * | 2014-05-28 | 2014-08-13 | 东南大学 | Resonance boost DC/DC converter and control method thereof suitable for high-voltage and high-power occasions |
| CN104135157A (en) * | 2014-07-07 | 2014-11-05 | 中国电子科技集团公司第四十一研究所 | Power conversion circuit of high-voltage power supply |
| CN106797181A (en) * | 2014-07-17 | 2017-05-31 | Abb瑞士股份有限公司 | For the power converter system of regenerative resource |
| US10374431B2 (en) | 2014-07-17 | 2019-08-06 | Abb Schweiz Ag | Power converter system for renewable energy sources |
| CN106797181B (en) * | 2014-07-17 | 2020-04-17 | Abb瑞士股份有限公司 | Power converter system for renewable energy sources |
| CN104242433A (en) * | 2014-09-22 | 2014-12-24 | 安徽启光能源科技研究院有限公司 | Energy management system for mixed energy source power station |
| CN104269843A (en) * | 2014-10-29 | 2015-01-07 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner power supply circuit and photovoltaic air conditioner |
| CN104269843B (en) * | 2014-10-29 | 2017-12-19 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner power supply circuit and photovoltaic air conditioner |
| CN104600749A (en) * | 2015-02-06 | 2015-05-06 | 中国科学院广州能源研究所 | Microgrid layered and synchronous control method |
| CN106160022A (en) * | 2015-03-31 | 2016-11-23 | 积能环保电机工程科技有限公司 | Direct current multivoltage electrical power trans mission/distribution system |
| CN110352554A (en) * | 2017-01-05 | 2019-10-18 | 通用电气公司 | Power converter for energy system |
| CN107492904A (en) * | 2017-07-11 | 2017-12-19 | 珠海光普海洋生态科技有限公司 | Power grid system for intelligent power generation and supply of wind energy and solar energy |
| CN108561278A (en) * | 2018-04-09 | 2018-09-21 | 江苏艮德电力设备有限公司 | A kind of wind power plant computer supervisory control system |
| CN108832890A (en) * | 2018-07-30 | 2018-11-16 | 浙江人和光伏科技有限公司 | A kind of photovoltaic component terminal box rapidly switched off |
| CN108832890B (en) * | 2018-07-30 | 2024-04-26 | 浙江人和光伏科技有限公司 | Photovoltaic module junction box capable of being rapidly turned off |
| CN109490004A (en) * | 2018-12-29 | 2019-03-19 | 珠海九源电力电子科技有限公司 | A kind of symmetrical expression electromagnetic drive experimental system and control method |
| CN109490004B (en) * | 2018-12-29 | 2020-11-24 | 珠海九源电力电子科技有限公司 | Symmetric electromagnetic driving experiment system and control method |
| CN113258801A (en) * | 2020-02-12 | 2021-08-13 | 新疆金风科技股份有限公司 | Direct current gets electric installation, system and wind generating set's start control system |
| CN113258801B (en) * | 2020-02-12 | 2022-11-29 | 新疆金风科技股份有限公司 | Direct current gets electric installation, system and wind generating set's start control system |
| CN111490553A (en) * | 2020-04-29 | 2020-08-04 | 清华-伯克利深圳学院筹备办公室 | Active power balancing device for micro-grid and control method thereof |
| CN112531779A (en) * | 2020-12-07 | 2021-03-19 | 国网新疆电力有限公司昌吉供电公司 | Multi-area power grid connection method |
| CN112531779B (en) * | 2020-12-07 | 2024-01-23 | 国网新疆电力有限公司昌吉供电公司 | Multi-region power grid wiring method |
| TWI800119B (en) * | 2021-11-25 | 2023-04-21 | 應能科技股份有限公司 | solar energy conversion system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103607032B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103607032B (en) | Renewable energy power generation, power transmission and transformation and electrical network access integral system | |
| Chen et al. | Analysis and comparison of medium voltage high power DC/DC converters for offshore wind energy systems | |
| Chen et al. | A comparison of medium voltage high power DC/DC converters with high step-up conversion ratio for offshore wind energy systems | |
| CN105811453A (en) | Distributed energy intelligent access system and access method thereof | |
| CN102611144B (en) | Photovoltaic grid-connected power generation device based on multilevel technique | |
| CN102142688B (en) | Electric power grid connecting system as well as electric power transmission system and method | |
| CA2800663A1 (en) | Electric energy conversion device | |
| CN203589824U (en) | Renewable energy power generation, power transmission and transformation and power grid access integration system | |
| CN103915856A (en) | Base station grid connected-charging photovoltaic micro-inverter system and control method thereof | |
| Manojkumar et al. | Power electronics interface for hybrid renewable energy system—A survey | |
| CN110556864A (en) | Remote power transmission converter station and power transmission system | |
| CN103311951B (en) | Wind power plant power transmission method based on voltage transformation of middle frequency or high frequency transformer | |
| CN205407292U (en) | Distributing type energy intelligence access system | |
| CN103368201A (en) | High-voltage direct current transmission type grid-tied photovoltaic power generation system | |
| CN203352190U (en) | Direct current power transmission system of wind generating set | |
| CN113098295A (en) | AC-AC converter | |
| CN106602566A (en) | Superconductive AC-DC customized electric power system having high power supply quality | |
| Mogstad et al. | Power collection and integration on the electric grid from offshore wind parks | |
| CN212392678U (en) | Offshore power transmission system | |
| CN102780231A (en) | Direct-current current source loop-based wind power station converging and grid-connecting method | |
| CN203574386U (en) | Multilevel multiport power generation and energy storage hybrid apparatus | |
| CN113098061A (en) | Offshore shore power low-frequency power transmission method based on modular multilevel converter | |
| CN202586368U (en) | Mini solar photovoltaic grid-connected inverter | |
| Hu et al. | Power quality improvement of unbalanced power system with distributed generation units | |
| CN210693470U (en) | Converter station and power transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20160817 Termination date: 20171120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |