Autonomous wind-driven station

FIELD: power engineering.

SUBSTANCE: wind-driven station comprises several wind-driven plants with AC generators and an electromechanical converter with an AC motor, comprising a number of pole pairs equal to a number of wind-driven plants of the station. The winding of one pair of motor stator poles is connected with a stator winding of the generator of only one of wind-driven plants. The stator winding of the AC generator of the electromechanical converter is connected to the AC buses of the station. The motor of the electromechanical converter is made with additional poles, windings of pairs of which form the specified stator winding of the AC generator.

EFFECT: simplified design of a wind-driven station with the possibility to use it both with synchronous and asynchronous generators.

1 dwg

 

The invention relates to the field of wind energy, specifically to a stand-alone wind power stations, containing several wind turbines with AC generators.

The wind power station is constructed so that the distance between wind power installations accounted for approximately 6-18 diameter propeller. This allows you to minimize the mutual influence of wind turbines, eliminating the decrease in wind speed from standing in the second echelons of the units for wind direction. But the wind is random. Therefore, the wind speed before the wind wheel is always different, and therefore different and capacity of wind turbines. For example, with increasing wind speed before the first wind power installation of its capacity will increase in the cubic dependence, and speed before the subsequent wind power installations have the old value, while the front of the indicated increase in wind speed will not overcome the specified distances between wind power plants. In turn, this causes the mutual influence of wind turbines and electrical parts in the form of power fluctuations tire wind power station. In the wind these power fluctuations are particularly obvious and often drive the t to the violation of stability of synchronous work station, since the resistance between the synchronous generators is provided by mutual corner.

Known wind power station (similar), containing several wind turbines with synchronous generators AC and the Electromechanical transducer of the two electric machines. The stator winding of the alternator Electromechanical transducer connected to the tires AC station (Dyakov A.F., Pernow AM, Chachacn YG Wind power in Russia. The state and prospects of development. - M.: MPEI Publishing house, 1996, see p.81-84). The motor of the Electromechanical transducer, designed as a DC machine, connected to the DC bus stations. To the same DC buses station is connected, each through its semiconductor rectifier synchronous generators of all wind turbines in parallel. This scheme preserves the mutual influence of wind turbines on the DC bus, but solves the problem of stability of synchronous station operation and reduces power fluctuations on the tires of the total load station through a shared centrifugal mass of the rotors of the Electromechanical Converter.

Device-analog has the following disadvantages. First, the scheme of the station contains a DC machine. Od is ako known (Electrical engineering Handbook. 4 ed., vol. 1, book 1, M, 1971)that the presence of the collector and brush device complicates its design, leads to high cost and relatively low reliability. Secondly, the scheme of the station contains a semiconductor rectifier according to the number of wind turbines. These moments generally complicate the scheme of wind power stations.

A device prototype (IPC F03D 7/02, Patent No. 2422674). Wind power station, containing several wind turbines with AC generators and Electromechanical Converter of the two electric machines, the stator winding of the alternator which is connected to the tires AC station, according to the invention, the motor of the Electromechanical Converter is implemented as an electric alternating current machine with the number of pole pairs equal to the number of wind turbines station, and the stator windings of the motor of the Electromechanical transducer connected to the stator windings of generators of wind turbines, and the winding of one pair of stator poles of the motor are connected with the stator winding of the generator is only one of the wind turbines.

The drawback of the prototype - design complexity due to the presence of two different types of electrical machines per the term of the current Assembly.

The technical problem to be solved by the proposed device consists in the simplification of the wind power station. The technical effect that solved the technical problem is the location of the generator windings on additional pairs of poles of the motor. This simplification is achieved by vetroenergeticheskoj station.

The problem is solved in that in a wind power station with several wind power plants with alternating current generators and Electromechanical Converter with AC motor that contains the number of pole pairs equal to the number of wind turbines station, and the winding of one pair of stator poles of the motor are connected with the stator winding of the generator is only one of the wind turbines and stator winding of the alternator Electromechanical transducer connected to the tires AC station, the motor of the Electromechanical Converter is implemented with additional poles, winding pairs which form specified stator winding of an AC generator.

The drawing shows a General view of the proposed Autonomous wind power station with three wind power plants.

In Autonomous wind power station according to the drawing, the first wind energy is the installation of the wind wheel 1 through the multiplier 2 is connected to the AC generator 3, and the second and third power plants that make up the relevant items 4, 5, 6 and 7, 8, 9. The drawing shows that when connecting to the local power system Electromechanical transducer 10, the rotor 11 of the motor is connected by means of shaft 12 through the clutch 13 and the gear 14 to the engine 15. The windings 16, 17 and 18 are wound respectively first, second and third pairs of stator poles 19 of the motor of the Electromechanical transducer 10. The coil 16 through the circuit 20 is connected with the stator winding of the generator 3 of the first wind power installation. The coil 17 through the circuit 21 is connected with the stator winding of the generator 6 of the second wind power installation. Winding 18 through the circuit 22 is connected with the stator winding of the generator 9 of the third wind energy plant. Additionally located on the stator 19, for example, three windings 23, 24, 25 form a generating coil of the Electromechanical transducer 10. They through the circuit 26 is connected to the tire AC 27 local energy systems.

At the same Autonomous wind power station has two types of performance. The first Electromechanical transducer 10 is designed as a multi-pole synchronous machine with AC power, the generators 3, 6 and 9 wind turbines made in the form of asynchronous AC machines. Second - elec is romanichesky Converter 10 is made in the form of a multi-pole asynchronous machine AC the generators 3, 6 and 9 wind turbines made in the form of a synchronous AC machines, and bus AC 27 must be the tyres powerful power systems for reactive power compensation.

The winding of each pair of poles of the Electromechanical transducer 10 may be performed, for example, according to the scheme of three-phase concentric winding for a split stator (Waldek A.I. of the Electric machine. 2 ed., revised and expanded, publishing house "Energy", Leningrad branch, 1974, see str-419).

Autonomous wind power station in the execution of the Electromechanical transducer 10 in the form of a multi-pole synchronous AC machine and generators 3, 6, 9 wind turbines made in the form of asynchronous AC machines, works as follows. As mentioned, the wind speed U1U2U3specified on the drawing, always different, and therefore different and capacity of wind turbines. When this wind turbine 1, 4 and 7 rotate with different speeds. Therefore, the rotor asynchronous generators 3, 6, 9 also rotate with different speeds with the slides, not exceeding a critical value. Since the electrical connection between the circuits of the windings 16, 17 and 18 pairs of stator poles 19 of the synchronous machine and the stator about the Otok asynchronous generators respectively 3, 6 and 9 no, the threads of the active capacity of the latter is directed to the Electromechanical transducer 10 and added them into mechanical power to the rotor 11 of the Electromechanical transducer 10. The total flight weight of the rotor 11, the gear 14 and diesel 15 reduces power fluctuations on the tires 27 total load station. Flows of reactive power required for normal operation asynchronous generators 3, 6 and 9 wind turbines, are generated synchronous Electromechanical transducer 10 and is directed from its windings 16, 17 and 18 to the generator 3, 6 and 9, i.e. directed against the flow of active power.

Autonomous wind power station in the execution of the Electromechanical transducer 10 in the form of an asynchronous machine AC and generators 3, 6, 9 wind turbines in the form of a synchronous AC machine works on the active power in the same way as in the previous case. I.e. threads active powers are directed from the generator 3, 6 and 9 to the inverter 10. But since each pair of poles of the Converter 10 operates in the single mode asynchronous machines, the reactive power necessary for their operation, are generated by synchronous generators 3, 6 and 9. Thus, streams of reactive power is directed from the generator 3, 6 and 9 to the engine 12. Gene is attornye winding 23, 24, 25 of the Electromechanical transducer 10 is operating in the mode of induction generator for normal operation which reactive power is consumed from the powerful energy system. This is the critical difference from the previous case.

The problem is solved by the proposed device. Autonomous wind power station is simplified, as there is no machine Electromechanical transducer. In addition, it can be used in wind power plants with synchronous generators and induction generators, which expands the area of its application. The proposed device can be applied to work in parallel with a powerful grid connection to her Shin AC station.

Wind power station with several wind power plants with alternating current generators and Electromechanical Converter with AC motor that contains the number of pole pairs equal to the number of wind turbines station, and the winding of one pair of stator poles of the motor are connected with the stator winding of the generator is only one of the wind turbines and stator winding of the alternator Electromechanical transducer connected to the tires AC station, characterized in that the motor of the Electromechanical Converter is implemented with additional poles, winding pairs which form specified stator winding of the alternator.



 

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