CN218850410U - Electric double-loop equipment of full-power variable-frequency pumped storage unit - Google Patents
Electric double-loop equipment of full-power variable-frequency pumped storage unit Download PDFInfo
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- CN218850410U CN218850410U CN202223111890.2U CN202223111890U CN218850410U CN 218850410 U CN218850410 U CN 218850410U CN 202223111890 U CN202223111890 U CN 202223111890U CN 218850410 U CN218850410 U CN 218850410U
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Abstract
The utility model provides an electrical double-loop device of a power variable-frequency pumped storage unit, which is arranged in a bus duct, wherein the bus duct comprises a bus duct upper layer and a bus duct lower layer; the electric double-loop equipment of the full-power variable-frequency pumped storage unit comprises: full-power frequency conversion system equipment and generator motor voltage loop equipment; the full-power frequency conversion system equipment is arranged on the upper layer of the bus duct; and the generator motor voltage loop equipment is arranged on the lower layer of the bus duct. The structures of an underground main workshop and an auxiliary workshop of the large pumped storage power station are not changed, and only a bus-tunnel double-layer structure is arranged, so that the excavation and support difficulty of underground cavern groups and the engineering investment are greatly reduced; the structure is safe and reliable, and the operation and maintenance are convenient.
Description
Technical Field
The utility model belongs to the technical field of the pumped storage power station, concretely relates to full power frequency conversion pumped storage unit's electric double loop equipment.
Background
The establishment of a novel power system mainly based on new energy sources such as wind power and photovoltaic is an urgent strategic task in the world. Because the wind power and photovoltaic output has the characteristics of randomness and intermittence, the safe and stable operation of a power grid due to large-scale new energy grid connection brings unprecedented challenges. With the development of power electronic technology, the water pumping and energy storage unit adopting the variable power and variable frequency technology has the advantages that the working condition input force of a water pump is adjustable, the power grid frequency can be quickly responded during power generation and water pumping, the active power and the reactive power are independently controlled, and the operation efficiency and the scheduling flexibility of the unit are improved; meanwhile, the system has large-range reactive power compensation capability and increasingly becomes an effective means for consuming new energy in a high proportion.
The existing electric double-loop equipment of the full-power frequency conversion unit has the characteristic of large floor area, and the floor area is about 900m 2 。
The main electromechanical equipment of the pumped storage power station is usually located in an underground plant with the burial depth of 200-300 m, and the underground cavern is usually composed of a main plant cavern, a bus duct cavern, a main transformer cavern, a tail gate cavern and other auxiliary caverns. The unit equipment is arranged in an underground main plant. According to the engineering research of the full-power variable-frequency pumped storage unit, most power stations solve the arrangement problem of two electrical loops by means of measures such as expanding excavation on the upstream side of a main plant or expanding excavation on a downstream auxiliary plant and additionally arranging the number of layers.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides an electric double loop equipment of full power frequency conversion pumped storage unit can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides an electrical double-loop device of a full-power variable-frequency pumped storage unit, which is arranged in a bus-bar hole, wherein the bus-bar hole comprises a bus-bar hole upper layer (21) and a bus-bar hole lower layer (22);
the electric double-loop equipment of the full-power variable-frequency pumped storage unit comprises: full-power frequency conversion system equipment and generator motor voltage loop equipment;
the full-power frequency conversion system equipment is arranged on the upper layer (21) of the bus duct; the generator-motor voltage loop device is arranged on the busbar cavity lower layer (22).
Preferably, the voltage loop equipment of the generator motor comprises a bus (2), an electric brake switch cabinet (3), a PT cabinet (4), a generator breaker (5), a PT/lightning arrester cabinet (6) and an excitation transformer (7); one end of the bus (2) is connected with the generating motor (1), and the other end of the bus (2) is sequentially connected with the electric brake switch cabinet (3), the PT cabinet (4), the generator circuit breaker (5), the PT/lightning arrester cabinet (6) and the exciting transformer (7) in series and then is connected to the main transformer (20) to form a generating motor voltage loop.
Preferably, the full-power frequency conversion system equipment comprises a connecting bus (8), a first isolating switch (9.1), a machine side resistance-capacitance filter (10), a machine side reactor (11), a full-power frequency converter, a network side reactor (14), a network side resistance-capacitance filter (15), a network side circuit breaker (16) and a second isolating switch (9.2);
one end of the connecting bus (8) connected to one end of the bus (2) for connection with the generator motor (1); the other end of the connecting bus (8) is sequentially connected with the first isolating switch (9.1), the machine side resistance-capacitance filter (10), the machine side reactor (11), the full-power frequency converter, the grid side reactor (14), the grid side resistance-capacitance filter (15), the grid side circuit breaker (16) and the second isolating switch (9.2) in series, and then is connected to one end, used for being connected with the main transformer (20), of the bus (2).
Preferably, the full power frequency converter comprises a five-level machine side converter (12) and an MMC network side converter (13) connected in series.
Preferably, the full-power frequency conversion system equipment further comprises a control panel cabinet (18).
Preferably, the system also comprises a full-power frequency converter cooling unit; the full-power frequency converter cooling unit comprises a cooler chamber (24), a cooler (17) and a cooling water pipe (19);
the cooler chamber (24) is arranged below the bus duct (22); -mounting the cooler (17) in the cooler chamber (24); one end of the cooling water pipe (19) is connected with the cooler (17), and the other end of the cooling water pipe (19) is connected with the full-power frequency converter in the upper layer (21) of the bus duct.
Preferably, the cooler chamber (24) is formed by a partition wall (23) and a side wall of the bus bar hole to form an independent cooling device room isolated from the electrical equipment.
Preferably, the bus duct is a circular arch straight wall-shaped underground cavern, and a spray anchor support and reinforced concrete lining protection structure is adopted.
Preferably, the floor of the bus duct lower layer (22) is a concrete bottom plate; the floor of the upper layer (21) of the bus duct is of a concrete plate girder structure.
The utility model provides a full-power frequency conversion pumped storage unit's electric double loop equipment has following advantage:
(1) The electric double-loop equipment is arranged in a bus hole, the bus hole is of a double-layer structure of an upper layer of the bus hole and a lower layer of the bus hole, full-power frequency conversion system equipment is arranged on the upper layer of the bus hole, and generating motor voltage loop equipment is arranged on the lower layer of the bus hole. The utility model has clear and reasonable arrangement structure, economy and practicality; the structures of an underground main workshop and an underground auxiliary workshop of the large pumped storage power station are not changed, and only a bus duct double-layer structure is arranged, so that the excavation supporting difficulty and the engineering investment of underground cavern groups are greatly reduced; the reasonable arrangement and connection of the full-power frequency conversion system equipment of the full-power frequency conversion unit and the voltage loop equipment of the generator motor are realized, the structure is safe and reliable, and the operation and maintenance are convenient;
(2) The cooler of the full-power frequency conversion system is arranged in an independent compartment on the lower layer of the bus duct, is connected to the full-power frequency converter on the upper layer of the bus duct through the cooling water pipe, provides heat exchange for the full-power frequency converter, effectively avoids potential safety hazards caused by water leakage of faults of the cooling system to two layers of electrical equipment of the bus duct, and ensures the operation safety of the whole system.
Drawings
Fig. 1 is a schematic diagram of an arrangement structure of an electrical double-loop device of a full-power variable-frequency pumped storage unit according to the present invention;
fig. 2 is a schematic plan view of the full-power frequency conversion system device layout of the full-power frequency conversion pumped storage unit of the present invention;
fig. 3 is a schematic plan view of the arrangement of the voltage loop device of the generator motor of the full-power frequency conversion pumped storage unit of the present invention;
fig. 4 is a schematic diagram of an electrical connection structure of an electrical double-circuit device of the full-power variable-frequency pumped-storage unit of the present invention;
in the figure:
1- - -a generator motor; 2- - -a bus bar; 3- -electric brake switch cabinet; 4- -PT cabinet; 5- -Generator breaker; 6- -PT/arrester cabinet; 7-excitation transformer; 8- -connecting bus; 9.1- - -a first isolating switch; 9.2- - -a second isolating switch; 10- - -machine side resistance-capacitance filter; 11-a machine side reactor; 12-five level side converter; 13- - -MMC network side converter; 14-a grid side reactor; 15- - -a net side RC filter; 16- -network side breaker; 17- -a cooler; 18- -control panel cabinet; 19- -a cooling water pipe; 20- - -a main transformer; 21- - -bus duct upper layer; 22-bus duct lower layer; 23- - -a partition wall; 24- -cooler chamber.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model aims to solve the technical problem that an arrange reasonable, economical and practical, safe and reliable, make things convenient for the electric double-circuit equipment of full power frequency conversion pumped storage unit of fortune dimension is provided.
Specifically, the following advantages are provided:
(1) The full-power frequency conversion loop equipment realizes the electrical function of the full-power frequency conversion loop; the structure does not change the structures of an underground main workshop and an auxiliary workshop of a large pumped storage power station, only a single-layer bus tunnel of a common constant-speed unit is designed into a double-layer bus tunnel, and the structure is arranged on the upper layer of the bus tunnel, so that the excavation supporting difficulty and the engineering investment of underground cavern groups are greatly reduced; the arrangement is clear and reasonable, the structure is safe and reliable, and the operation and maintenance are convenient.
(2) The arrangement of the voltage loop equipment of the generator motor realizes the electrical function of the voltage loop of the generator motor; the structure does not change the structures of an underground main workshop and an auxiliary workshop of a large pumped storage power station, only a single-layer bus tunnel of a common constant-speed unit is designed into a double-layer bus tunnel, and the structure is arranged at the lower layer of the bus tunnel, so that the excavation supporting difficulty and the engineering investment of underground cavern groups are greatly reduced; the arrangement is clear and reasonable, the structure is safe and reliable, and the operation and maintenance are convenient.
(3) The cooler is arranged in the independent compartment of lower floor, is connected to the full power converter on bus duct upper strata through condenser tube, for the full power converter provides the heat exchange, has effectively avoided leaking the potential safety hazard that brings for the two-layer electrical equipment in bus duct because of cooling system's trouble.
(4) The bus hole upper layer and the bus hole lower layer are respectively suitable for a full-power frequency conversion system equipment arrangement structure and a generating motor voltage loop equipment arrangement structure, and the electrical functions of the equipment are reasonably realized.
Referring to fig. 1, the electrical double-loop device of the full-power frequency conversion pumped storage unit provided by the present invention is disposed in a bus duct, and the bus duct includes a bus duct upper layer 21 and a bus duct lower layer 22;
the electric double-loop equipment of the full-power variable-frequency pumped storage unit comprises: full-power frequency conversion system equipment and generator motor voltage loop equipment;
the full-power frequency conversion system equipment is arranged on the upper layer 21 of the bus duct; the generator-motor voltage return device is arranged in the bushole lower layer 22.
The following respectively describes the full-power frequency conversion system equipment and the generator-motor voltage loop equipment in detail:
generator-motor voltage loop apparatus:
with reference to fig. 3 and 4, the generator-motor voltage loop apparatus includes a bus bar 2, an electric brake switch cabinet 3, a PT cabinet 4, a generator breaker 5, a PT/arrester cabinet 6, and an exciting transformer 7; one end of the bus 2 is connected with the generating motor 1, and the other end of the bus 2 is sequentially connected with the electric brake switch cabinet 3, the PT cabinet 4, the generator circuit breaker 5, the PT/lightning arrester cabinet 6 and the exciting transformer 7 in series and then is connected to the main transformer 20 to form a generating motor voltage loop.
(II) full-power frequency conversion system equipment:
with reference to fig. 2 and 4, the full-power frequency conversion system equipment includes a connecting bus 8, a first isolating switch 9.1, a machine-side resistance-capacitance filter 10, a machine-side reactor 11, a full-power frequency converter, a grid-side reactor 14, a grid-side resistance-capacitance filter 15, a grid-side circuit breaker 16 and a second isolating switch 9.2;
one end of the connecting bus bar 8 connected to one end of the bus bar 2 for connection to the generator motor 1; the other end of the connecting bus 8 is connected in series with the first isolating switch 9.1, the machine side resistance-capacitance filter 10, the machine side reactor 11, the full-power frequency converter, the grid side reactor 14, the grid side resistance-capacitance filter 15, the grid side circuit breaker 16 and the second isolating switch 9.2 in sequence, and then is connected to one end of the bus 2, which is used for being connected with the main transformer 20.
Wherein, the full-power frequency converter comprises a five-level machine side converter 12 and an MMC network side converter 13 which are connected in series.
The full-power frequency conversion system equipment also comprises a control panel cabinet 18 which is responsible for the full-power frequency conversion operation control function.
In order to realize the cooling of the full-power frequency converter and ensure the working performance of the full-power frequency converter, the cooling device also comprises a full-power frequency converter cooling unit; the full-power frequency converter cooling unit comprises a cooler chamber 24, a cooler 17 and a cooling water pipe 19;
the cooler chamber 24 is arranged below the bus duct 22; the cooler 17 is installed in the cooler chamber 24; one end of the cooling water pipe 19 is connected with the cooler 17, and the other end of the cooling water pipe 19 is connected with the full-power frequency converter in the bus duct upper layer 21.
In one embodiment, the cooler chamber 24 is formed by the partition wall 23 and the side wall of the bus bar hole to form an independent cooling equipment room isolated from the electrical equipment, and a roof is not required.
The bus duct is a circular arch straight wall-shaped underground cavern, and a spray anchor support and reinforced concrete lining protection structure is adopted. Wherein, the floor of the bus duct lower layer 22 is a concrete bottom plate; the floor of the bus duct upper layer 21 is of a concrete plate girder structure.
The utility model discloses an electric double loop equipment of underground factory building full power frequency conversion pumped storage unit, including full power frequency conversion system equipment and generator motor voltage loop equipment, full power frequency conversion system equipment forms full power frequency conversion operation return circuit, and generator motor voltage loop equipment forms the electricity generation operation return circuit, and two return circuits are parallelly connected, constitute the electric double loop of full power frequency conversion pumped storage unit. The working principle is as follows:
the full-power frequency conversion system equipment realizes the full-power frequency conversion operation of the pumped storage unit, namely, the generator motor 1 with synchronous fixed rotating speed is configured with a full-power frequency converter formed by a five-level machine side converter 12 and an MMC network side converter 13 as a main loop, so that the generator motor 1 can generate power and can operate in various working conditions in the pumping direction; wherein the connecting bus bar 8 is used for electrical connection; the first isolating switch 9.1 at the outlet of the generator motor 1 is used for the safe isolation between the two devices when the generator motor 1 or the full-power frequency converter is overhauled; the machine side resistance-capacitance filter 10 and the network side resistance-capacitance filter 15 are respectively used for filtering harmonic waves generated when the five-level machine side converter 12 and the MMC network side converter 13 work, the machine side reactor 11 and the machine side resistance-capacitance filter 10 are combined to form a sine wave filter, the very steep voltage change rate du/dt output by the frequency converter is limited so as to eliminate a very large voltage peak generated at the end part of a winding by du/dt, the network side reactor 14 is used for limiting surge current and circulation current when the MMC network side converter 13 works and limiting short-circuit current of a direct current loop, the network side circuit breaker 16 is used for connecting a full-power frequency converter and a main transformer 20 to complete grid connection with a power grid, a second isolating switch 9.2 at the low-voltage side of the main transformer 20 is used for safety isolation between the full-power frequency converter and the main transformer 20 during maintenance, the control panel cabinet 18 is used for full-power frequency conversion operation control function, the cooler 17 is cooling system equipment of the full-power frequency converter, and the cooler 17 is connected to the full-power frequency converter through a cooling water pipe 19;
the generator motor voltage loop equipment realizes the synchronous constant rotating speed of the generator motor 1, a generator breaker 5 is configured to serve as a bypass loop to realize the operation in the generating direction, wherein a bus 2 is used for electric energy transmission, and an electric brake switch cabinet 3 is used for electric braking when a unit stops; the voltage of a PT measuring generator loop in the PT cabinet 4 is used for protection, metering and measurement; the generator circuit breaker 5 is used for synchronizing the generator motor 1 with a power grid; the PT in the PT/arrester cabinet 6 measures the voltage of the generator loop for protection, measurement and measurement, the arrester in the PT/arrester cabinet 6 is used for performing overvoltage protection on the generator loop, and the exciting transformer 7 is used for providing power supply for the excitation system of the synchronous generator motor.
When the unit operates in a full-power frequency conversion mode through a full-power frequency conversion operation loop, the operation of the power generation direction is described as follows: under normal conditions, a first isolating switch 9.1 and a second isolating switch 9.2 are in a switch-on state, a network side circuit breaker 16 is connected with a main transformer 20 in a switch-on state, a generator motor 1 is started, a full-power frequency converter formed by a five-level machine side converter 12 and an MMC network side converter 13 is put into operation, a unit runs in a generating direction, a machine side resistance-capacitance filter 10, a machine side reactor 11, a network side reactor 14, a network side resistance-capacitance filter 15, a cooler 17 and a cooling water pipe 19 maintain normal operation of the full-power frequency converter, a connecting bus 8 is connected with loop equipment, and a control panel cabinet 18 is in charge of a full-power frequency conversion operation control function.
When the unit operates in a full-power frequency conversion mode through a full-power frequency conversion operation loop, the operation of the water pumping direction is described as follows: under normal conditions, the first isolating switch 9.1 and the second isolating switch 9.2 are in a switch-on state, the grid-side circuit breaker 16 is connected with the main transformer 20 in a switch-on state, the generator motor 1 is started, the full-power frequency converter is put into operation, the unit operates in a water pumping direction, the machine-side resistance-capacitance filter 10, the machine-side reactor 11, the grid-side reactor 14, the grid-side resistance-capacitance filter 15, the cooler 17 and the cooling water pipe 19 maintain the normal operation of the full-power frequency converter, the connecting bus 8 is used for connecting the loop equipment, and the control panel cabinet 18 is in charge of the full-power frequency conversion operation control function.
When the unit carries out the operation of the generating direction through the generating operation loop, the operation of the generating direction is described as follows: under the normal condition, the first isolating switch 9.1 and the second isolating switch 9.2 are in an opening state, the generating motor 1 is started, the exciting transformer 7 provides an exciting power supply for a rotor of the generating motor, when the generating motor meets a synchronous closing condition, the generator breaker 5 is closed, the generating set runs in the generating direction, the PT cabinet 4 and the PT/lightning arrester cabinet 6 maintain the normal running of the generating set, and the bus 2 is connected with the loop equipment.
When the unit is stopped in the power generation direction through the power generation operation loop, the stop process in the power generation direction is described as follows: under normal conditions, a first isolating switch 9.1 and a second isolating switch 9.2 are in a brake-separating state, a generator motor 1 receives a stop order, a generator circuit breaker 5 is in a brake-separating state when the generator motor is in a no-load state, a generator motor excitation system field-extinguishing switch is disconnected after inversion field-extinguishing, an excitation transformer 7 does not provide an excitation power supply any more, an electric brake switch cabinet 3 is put into use, excitation is thrown to perform 1 electric brake on the generator motor and the generator motor is stopped under the assistance of mechanical brake, a PT cabinet 4 and a PT/lightning arrester cabinet 6 maintain the stop process of a unit, and a bus 2 is connected with the loop equipment.
The electric double-loop connection structure of the full-power variable-frequency pumped storage unit realizes the organic combination of two loops and multiple operation modes. The full-power variable-frequency operation loop can realize that the pumped storage unit can adjust the rotating speed and the input force under the electric working condition, automatically track the frequency of a power grid and ensure the stability and the safety of the power grid; the power generation working condition energy output power adjusting range is larger, the efficiency is higher, and the stability is better; the power generation operation loop can provide another mode of power generation working condition operation, the unit can perform power generation operation at a constant speed without a frequency converter, the operation loss of the frequency converter is avoided, and the power generation operation loop is a relatively economic and safe operation mode when the comprehensive power generation efficiency of a power station is a priority target. When equipment is failed or overhauled, the two power generation modes can be mutually standby. The set full-power frequency conversion circuit network side circuit breaker and the power generation operation circuit generator circuit breaker can both realize unit grid connection in a reliable mode, frequent start-stop operation of the main transformer high-voltage side circuit breaker is avoided, and safety of a power station and a power grid is ensured.
The utility model provides an electric double loop equipment of full power frequency conversion pumped storage unit has following characteristics:
(1) The electrical double-circuit equipment is arranged in a bus hole, the bus hole is of a double-layer structure with a bus hole upper layer and a bus hole lower layer, full-power frequency conversion system equipment is arranged on the bus hole upper layer, and generating motor voltage circuit equipment is arranged on the bus hole lower layer. The utility model has clear and reasonable arrangement structure, economy and practicality; the structures of an underground main workshop and an underground auxiliary workshop of the large pumped storage power station are not changed, and only a bus duct double-layer structure is arranged, so that the excavation supporting difficulty and the engineering investment of underground cavern groups are greatly reduced; the reasonable arrangement and connection of the full-power frequency conversion system equipment of the full-power frequency conversion unit and the voltage loop equipment of the generator motor are realized, the structure is safe and reliable, and the operation and maintenance are convenient;
(2) The cooler of the full-power frequency conversion system is arranged in an independent compartment on the lower layer of the bus duct, is connected to the full-power frequency converter on the upper layer of the bus duct through the cooling water pipe, provides heat exchange for the full-power frequency converter, effectively avoids potential safety hazards caused by water leakage of faults of the cooling system to two layers of electrical equipment of the bus duct, and ensures the operation safety of the whole system.
Therefore, the independent cooler chamber is arranged at the lower layer of the bus duct and is completely isolated from the electrical equipment, so that the operation safety is ensured; the above arrangement ensures the electrical function and operational safety of the full-power variable frequency circuit device and the generator motor voltage circuit device.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (9)
1. The electrical double-loop equipment of the full-power variable-frequency pumped storage unit is characterized in that the electrical double-loop equipment of the full-power variable-frequency pumped storage unit is arranged in a bus hole, and the bus hole comprises a bus hole upper layer (21) and a bus hole lower layer (22);
the electric double-loop equipment of the full-power variable-frequency pumped storage unit comprises: full-power frequency conversion system equipment and generator motor voltage loop equipment;
the full-power frequency conversion system equipment is arranged on the upper layer (21) of the bus duct; the generator motor voltage loop device is arranged on the bus duct lower layer (22).
2. The electrical double-circuit device of a full-power variable-frequency pumped-storage unit according to claim 1, characterized in that the generator-motor voltage circuit device comprises a bus (2), an electrical brake switch cabinet (3), a PT cabinet (4), a generator breaker (5), a PT/arrester cabinet (6) and an excitation transformer (7); one end of the bus (2) is connected with the generating motor (1), and the other end of the bus (2) is sequentially connected with the electric brake switch cabinet (3), the PT cabinet (4), the generator circuit breaker (5), the PT/lightning arrester cabinet (6) and the exciting transformer (7) in series and then is connected to the main transformer (20) to form a generating motor voltage loop.
3. The electrical double-circuit device of a full-power variable-frequency pumped-storage group according to claim 2, characterized in that the full-power variable-frequency system device comprises a connecting bus (8), a first disconnector (9.1), a machine-side resistance-capacitance filter (10), a machine-side reactor (11), a full-power frequency converter, a grid-side reactor (14), a grid-side resistance-capacitance filter (15), a grid-side circuit breaker (16) and a second disconnector (9.2);
one end of the connecting bus (8) connected to one end of the bus (2) for connection with the generator motor (1); the other end of the connecting bus (8) is sequentially connected with the first isolating switch (9.1), the machine side resistance-capacitance filter (10), the machine side reactor (11), the full-power frequency converter, the grid side reactor (14), the grid side resistance-capacitance filter (15), the grid side circuit breaker (16) and the second isolating switch (9.2) in series, and then is connected to one end, used for being connected with the main transformer (20), of the bus (2).
4. The electrical double-circuit device of a full-power variable-frequency pumped-storage group according to claim 3, characterized in that the full-power frequency converter comprises a five-level machine-side converter (12) and an MMC grid-side converter (13) connected in series.
5. The electrical dual-circuit apparatus of a full-power variable frequency pumped-storage group according to claim 3, wherein the full-power variable frequency system apparatus further comprises a control panel cabinet (18).
6. The electrical dual-circuit apparatus of the full-power variable-frequency pumped-storage unit according to claim 3, further comprising a full-power inverter cooling unit; the full-power frequency converter cooling unit comprises a cooler chamber (24), a cooler (17) and a cooling water pipe (19);
the cooler chamber (24) is arranged on the busway lower layer (22); -mounting the cooler (17) in the cooler chamber (24); one end of the cooling water pipe (19) is connected with the cooler (17), and the other end of the cooling water pipe (19) is connected with the full-power frequency converter in the upper layer (21) of the bus duct.
7. The electrical double-circuit equipment of a full-power variable-frequency pumped-storage group according to claim 6, characterized in that the cooler room (24) is formed with partition walls (23) and bus-bar hole side walls as an independent cooling equipment room isolated from the electrical equipment.
8. The electrical double-circuit equipment of the full-power variable-frequency pumped-storage unit according to claim 1, wherein the busway is a circular arch vertical wall-shaped underground cavern, and a spray anchor support and reinforced concrete lining protection structure is adopted.
9. The electrical double-circuit equipment of the full-power variable-frequency pumped-storage unit according to claim 1, wherein the floor of the lower layer (22) of the busway is a concrete floor; the floor of the upper layer (21) of the bus duct is of a concrete plate girder structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223111890.2U CN218850410U (en) | 2022-11-17 | 2022-11-17 | Electric double-loop equipment of full-power variable-frequency pumped storage unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223111890.2U CN218850410U (en) | 2022-11-17 | 2022-11-17 | Electric double-loop equipment of full-power variable-frequency pumped storage unit |
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| Publication Number | Publication Date |
|---|---|
| CN218850410U true CN218850410U (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223111890.2U Active CN218850410U (en) | 2022-11-17 | 2022-11-17 | Electric double-loop equipment of full-power variable-frequency pumped storage unit |
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| CN (1) | CN218850410U (en) |
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2022
- 2022-11-17 CN CN202223111890.2U patent/CN218850410U/en active Active
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