CN110212824A - A kind of direct high voltage output double-fed switch reluctance generator converter system - Google Patents

Abstract

A kind of direct high voltage output double-fed switch reluctance generator converter system, by battery, unsteady flow main circuit, excitation charging and energy regenerative circuit, output capacitor composition, unsteady flow main circuit mutually isostructural circuitry phase head and the tail where each phase winding, which are connected in parallel, to be formed, each circuitry phase itself can directly realize simultaneously that high voltage exports, the functions such as enhanced excitation, excitation charging then realizes charging with energy regenerative circuit simultaneously, excitation, under reversed energy regenerative and adjustable several big functions, it takes into account and obtains good charging excitation power quality and reverse feeding voltage, and power generation is exported and excitation Isolation and decoupling, compound multi-functional excellent results are directly realized by which the present invention solves a set of converter system and integrates, the switch reluctance generator system field application being suitable under all kinds of driving power.

Description

A Direct High Voltage Output Doubly-fed Switched Reluctance Generator Converter System

technical field

The invention relates to the field of switched reluctance motor systems, in particular to a switched reluctance generator converter system and a control method thereof, in which a converter main circuit directly outputs high voltage, an excitation circuit can be automatically charged, and energy can be fed back.

Background technique

Because of its simple and firm structure, no winding on the rotor, convenient heat dissipation, high reliability, and strong fault tolerance, the switched reluctance motor has a wide range of application prospects.

In the working of switched reluctance generator, it is generally divided into two stages: excitation and power generation. In the excitation stage, it is often hoped that the required winding current can be established as soon as possible, so as to leave enough time for the subsequent stage of power generation to generate output. By increasing the excitation Voltage enhanced excitation is a means, but often requires a separate excitation circuit with adjustable excitation voltage, which increases the complexity of structure and control.

The excitation methods of switched reluctance generators generally include separate excitation and self-excitation. The excitation of the external excitation mode is stable and does not affect the output terminal, but the maintenance cost is high and requires a separate excitation power supply such as a battery. The self-excitation mode does not require a separate power supply. The separately excited type has the disadvantages of frequently replacing the battery, etc., but in the conventional self-excitation mode, it will generally cause large fluctuations at the output end, and at the same time, the input excitation power is unstable and the power quality is low. At present, there are self-excitation with a special excitation circuit. A type structure converter system can realize the decoupling of the output side of the power generation and the excitation voltage, thereby avoiding this problem, but the excitation circuit can only function as a single excitation power supply, and needs to work together with the main power generation circuit at the same time. The battery is used as the excitation power supply. If the excitation circuit is only responsible for charging the battery at the same time, the problem of the long-term uninterrupted follow-up work of the excitation circuit can be solved. However, the output side of the excitation circuit has higher requirements, because it is more efficient and safe to charge the battery. Charge.

In most applications of switched reluctance generators, it is often necessary to increase the voltage through a special booster circuit after generating output to meet the requirements, which greatly increases the complexity of structure and control, making reliability and efficiency Decrease, or use the difference in the converter circuit where the windings of each phase of the switched reluctance generator are located, and directly boost the voltage after each output is connected in series, but this structure faces the problem of low power quality at the output side.

Contents of the invention

According to the above background technology, the present invention proposes a method that utilizes the inverter main circuit of each phase winding to directly increase the output voltage by a high multiple without connecting in series, and also utilizes the inverter main circuit itself to achieve enhanced excitation, and the output side is extremely low voltage In addition to fast charging and excitation of the battery, the new excitation charging circuit can also be used to feed back energy to improve the adaptability of the system. It also has an isolation function and does not require Working continuously for a long time together with the converter main circuit, such a switched reluctance generator converter system and its control method are applicable to various power drives including wind power drives, and switched reluctance generators whose output is connected to a DC power grid or directly connected to a load system.

Technical scheme of the present invention is:

A direct high-voltage output doubly-fed switched reluctance generator converter system, characterized in that it includes: a battery, a converter main circuit, an excitation charging and energy feeding circuit, and an output capacitor, and the positive and negative terminals of the battery are respectively connected to the The input positive and negative terminals of the inverter main circuit are respectively connected to the positive and negative terminals of the excitation charging and the energy feeding circuit output, and the positive and negative terminals of the output of the inverter main circuit are respectively connected to the excitation charging and the input positive and negative terminals of the energy feeding circuit. Both ends of the negative pole are connected to the positive and negative poles of the output capacitor respectively;

The inverter main circuit is composed of the first phase circuit, the second phase circuit, and the third phase circuit. The three structures are exactly the same. Their respective input positive and negative terminals are connected respectively, and their output positive and negative terminals are respectively connected. Their input positive and negative terminals are respectively used as the input positive and negative terminals of the inverter main circuit, and their output positive and negative terminals are respectively used as the output positive and negative terminals of the inverter main circuit;

The first phase circuit consists of the first phase winding, the first diode, the second diode, the third diode, the fourth diode, the first switching tube, the second switching tube, the first capacitor, the second Composed of capacitors, one end of the first phase winding is connected to the anode of the fourth diode, and is used as the positive end of the first phase circuit input, and the other end of the first phase winding is connected to the anode of the first diode, the second The anode of the switch tube and one end of the second capacitor, the cathode of the first diode connected to the anode of the first switch tube and one end of the first capacitor, the cathode of the first switch tube connected to the cathode of the second diode, and used as The negative terminal of the first phase circuit input, the anode of the second diode is connected to the other end of the first capacitor, the cathode of the second switch tube, and the cathode of the third diode, the anode of the third diode is connected to the other end of the second capacitor, and As the negative terminal of the output of the first phase circuit, the cathode of the fourth diode is used as the positive terminal of the output of the first phase circuit;

The second phase circuit consists of the second phase winding, the fifth diode, the sixth diode, the seventh diode, the eighth diode, the third switching tube, the fourth switching tube, the third capacitor, the fourth Composed of capacitors, one end of the second phase winding is connected to the anode of the eighth diode, and is used as the positive end of the second phase circuit input, and the other end of the second phase winding is connected to the anode of the fifth diode, the fourth The anode of the switch tube and one end of the fourth capacitor, the cathode of the fifth diode connected to the anode of the third switch tube and one end of the third capacitor, the cathode of the third switch tube connected to the cathode of the sixth diode, and used as The negative terminal of the second phase circuit input, the anode of the sixth diode is connected to the other end of the third capacitor, the cathode of the fourth switch tube, and the cathode of the seventh diode, the anode of the seventh diode is connected to the other end of the fourth capacitor, and As the negative terminal of the output of the second phase circuit, the cathode of the eighth diode is used as the positive terminal of the output of the second phase circuit;

The third phase circuit consists of the third phase winding, the ninth diode, the tenth diode, the eleventh diode, the twelfth diode, the fifth switching tube, the sixth switching tube, the fifth capacitor, The sixth capacitor is composed of one end of the third phase winding connected to the anode of the twelfth diode and used as the positive end of the third phase circuit input, the other end of the third phase winding is connected to the anode of the ninth diode, the The anode of the sixth switch tube is connected to one end of the sixth capacitor, the cathode of the ninth diode is connected to the anode of the fifth switch tube and one end of the fifth capacitor, and the cathode of the fifth switch tube is connected to the cathode of the tenth diode , and as the third phase circuit input negative terminal, the anode of the tenth diode is connected to the other end of the fifth capacitor, the cathode of the sixth switching tube, and the cathode of the eleventh diode, and the anode of the eleventh diode is connected to the sixth The other end of the capacitor is used as the negative terminal of the third-phase circuit output, and the cathode of the twelfth diode is used as the positive terminal of the third-phase circuit output;

The excitation charging and energy feeding circuit consists of the seventh capacitor, the eighth capacitor, the ninth capacitor, the tenth capacitor, the thirteenth diode, the fourteenth diode, the seventh switch tube, the eighth switch tube, and the ninth switch tube tube, the tenth switch tube, the eleventh switch tube, the twelfth switch tube, the thirteenth switch tube, the fourteenth switch tube, a transformer, and an inductor, one end of the seventh capacitor, one end of the ninth capacitor, The cathode of the thirteenth diode is connected to the anode of the fifteenth switch tube, and is used as the input positive terminal of the excitation charging and energy feeding circuit, one end of the eighth capacitor, one end of the tenth capacitor, and the tenth capacitor The anodes of the four diodes are connected to the cathode of the sixteenth switch tube, and are used as the input negative terminal of the excitation charging and energy feeding circuit, one end of the secondary side winding of the transformer is connected to the other end of the seventh capacitor, and the anode of the thirteenth diode , the cathode of the fifteenth switching tube, the other end of the eighth capacitor, the cathode of the fourteenth diode, and the anode of the sixteenth switching tube are connected, and the other end of the secondary side winding of the transformer is connected to the other end of the ninth capacitor and the other end of the tenth capacitor One end of the primary side winding of the transformer is connected to the cathode of the seventh switch tube, the anode of the eighth switch tube, the anode of the ninth switch tube, and the cathode of the tenth switch tube, and the other end of the primary side winding of the transformer is connected to the cathode of the first switch tube. The cathode of the eleventh switch tube, the anode of the twelfth switch tube, the anode of the thirteenth switch tube, and the cathode of the fourteenth switch tube are connected, the anode of the seventh switch tube, the cathode of the eighth switch tube, and the eleventh switch tube The anode of the tube is connected to the cathode of the twelfth switch tube, and is connected to one end of the inductance. The cathode and the anode of the fourteenth switching tube are connected, and are used as the output negative terminal of the excitation charging and energy feeding circuit.

A control method for a direct high-voltage output doubly-fed switched reluctance generator converter system, characterized in that, during the operation of the switched reluctance generator, according to the rotor position information, when the first phase winding needs to be put into operation, the first phase circuit Putting into work, the first is the excitation stage, the first switch tube and the second switch tube are closed and turned on at the same time, according to the rotor position information, when the excitation phase is over, the first switch tube and the second switch tube are disconnected to enter the power generation stage; when the second When the phase winding needs to be put into operation, correspondingly firstly, the third switch tube and the fourth switch tube are closed and conducted at the same time to enter the excitation stage. Power generation stage; when the third phase winding needs to be put into operation, correspondingly firstly, the fifth switching tube and the sixth switching tube are closed and turned on at the same time to enter the excitation phase, and when the excitation phase ends according to the rotor position information, the fifth switching tube and the sixth switching tube are disconnected. The sixth switching tube enters the power generation stage;

When it is detected that the power of the battery is lower than the lower limit, the excitation charging and energy feeding circuit starts to work in the forward direction to charge the battery. When the circuit is working in the forward direction, it is divided into the following eleven switching steps and circulates:

Step 1: the eighth switch tube and the fourteenth switch tube are closed and conducting;

Step 2: the twelfth switch tube is turned on and turned on;

Step 3: The eighth switch tube is disconnected;

Step 4: the tenth switch tube and the sixteenth switch tube are turned on and turned on;

Step five: the fourteenth switch tube is disconnected;

Step 6: The sixteenth switch tube is disconnected;

Step 7: The eighth switch tube is turned on and turned on;

Step 8: The twelfth switch tube is disconnected;

Step 9: the fourteenth switch tube and the fifteenth switch tube are turned on and turned on;

Step 10: The tenth switch tube is disconnected;

Step eleven: the fifteenth switch tube is disconnected;

Based on the above working steps, the duty cycle of each switching tube can be adjusted within its adjustable range, so as to meet the requirements for charging the battery and exciting the converter main circuit;

When the power of the battery is higher than the lower limit value, the electric energy required by the output capacitor side is too large and the main converter circuit cannot meet the demand, the excitation charging and energy feeding circuit will reverse the current conversion work, and provide the battery electric energy conversion to the output capacitor side, and the excitation The reverse conversion operation of the charging and energy feeding circuit is divided into the following eleven switching steps, and the cycle is repeated:

Step 1: the ninth switch tube and the eleventh switch tube are closed and conducting;

Step 2: the thirteenth switching tube is turned on and turned on;

Step 3: The ninth switch tube is disconnected;

Step 4: the seventh switch tube and the sixteenth switch tube are turned on and turned on;

Step five: the eleventh switch tube is disconnected;

Step 6: The sixteenth switch tube is disconnected;

Step 7: The ninth switch tube is turned on and turned on;

Step 8: The thirteenth switching tube is disconnected;

Step 9: the eleventh switch tube and the fifteenth switch tube are turned on and turned on;

Step 10: The seventh switch tube is disconnected;

Step eleven: the fifteenth switch tube is disconnected;

Based on the above working steps of excitation charging and reverse conversion of the energy feeding circuit, the duty cycle of each switch tube can be adjusted within its adjustable range so as to meet the demand for power supply to the output capacitor side.

Technical effect of the present invention mainly contains:

(1) The present invention utilizes its converter main circuit to directly realize the high-fold increase of the output voltage of the power generation without a special booster circuit, and based on this, the output of each phase circuit can be connected in parallel. After parallel connection, the output terminal voltage and The current is relatively more stable and of high quality.

(2) When the voltage on the output side is too low in extreme cases and is lower than the voltage at both ends of the battery, under the inverter main circuit of this structure, the battery passes through the fourth diode, the eighth diode, and the twelfth diode The tube can directly bypass the converter main circuit to quickly provide power supply and boost operation, which is of practical significance in restoring normal power supply in extreme situations such as low voltage ride-through remedy under wind power conditions, or sudden increase in load and low voltage.

(3) Under the inverter main circuit with the structure of the present invention, the excitation can be strengthened, and the battery and a capacitor are jointly excited, so that the winding current can be quickly increased in a short time, the output capacity of the power generation stage can be increased, and the power generation efficiency can be improved.

(4) Although the structure of the excitation charging and energy feeding circuit is relatively complicated, three functions can be realized under the same structure, including forward charging, forward direct excitation, reverse energy feeding, and step-down when forward, but the key is The output is equivalent to a relatively stable current source, which is extremely beneficial to battery charging and ideal requirements as an excitation power supply. When feeding back energy, it is equivalent to a boosted voltage source, which is beneficial to the constant voltage power supply demand on the load side. In this case, no additional stabilization circuit is required.

(5) The excitation charging and energy feeding circuit has an isolation link, so that the excitation and power generation output of the switched reluctance generator are isolated and the interference is reduced; in addition, the circuit can adjust the duty cycle of each switch tube within a certain range, Achieving output changes enhances adaptability and flexibility; in addition, although the excitation charging and energy feeding circuits are relatively complex as mentioned above, there is another advantage that the circuit will only be put into operation in extreme cases, including storage battery In extreme situations such as charging is required and the voltage on the output side of the power generation drops sharply, the proportion of time these working conditions occupy is extremely low in practice.

Description of drawings

Fig. 1 is a circuit structure diagram of a direct high voltage output doubly-fed switched reluctance generator converter system of the present invention.

Detailed ways

A direct high-voltage output doubly-fed switched reluctance generator converter system of this embodiment, the converter system circuit structure is shown in Figure 1, which consists of a battery X, converter main circuit 1, excitation charging and energy feeding circuit 2 , output capacitor C0, the positive and negative terminals of the battery X are respectively connected to the positive and negative terminals of the inverter main circuit 1 input, and at the same time respectively connected to the positive and negative terminals of the excitation charging and energy feeding circuit 2 output, and the output of the inverter main circuit 1 The two ends of the positive and negative poles are respectively connected to the positive and negative poles of the excitation charging and energy feeding circuit 2 input, and the two ends of the positive and negative poles of the output capacitor C0 are connected respectively, which are also the power generation power output terminals of the switched reluctance generator of the present invention;

The converter main circuit 1 is composed of a first phase circuit 101, a second phase circuit 102, and a third phase circuit 103. The structures of the three are exactly the same. Their respective input positive and negative poles are connected respectively, and their output positive and negative poles The positive and negative ends of their input are respectively used as the positive and negative ends of the input of the main converter circuit 1, and the positive and negative ends of their output are respectively used as the positive and negative ends of the output of the main converter circuit 1. That is to say, the three phase circuits where the three-phase windings of the switched reluctance generator in this embodiment are located are all connected in parallel, including the input end and the output end, and the storage battery X provides excitation electric energy;

The first phase circuit 101 is composed of the first phase winding M, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the first switching tube V1, the second switching tube V2, the first capacitor C1, and the second capacitor C2, one end of the first phase winding M is connected to the anode of the fourth diode D4, and the positive end of the first phase circuit 101 is connected to the positive end of the battery X, and the other end of the first phase winding M Connect the anode of the first diode D1, the anode of the second switching tube V2, and one end of the second capacitor C2. The cathode of the first diode D1 is connected to the anode of the first switching tube V1 and one end of the first capacitor C1. The cathode of the first switching tube V1 is connected to The cathode of the second diode D2 is used as the input negative terminal of the first phase circuit 101 to connect to the negative pole of the storage battery X, the anode of the second diode D2 is connected to the other end of the first capacitor C1, the cathode of the second switching tube V2, and the third diode The cathode of D3, the anode of the third diode D3 is connected to the other end of the second capacitor C2, and serves as the negative terminal of the output of the first phase circuit 101, and the cathode of the fourth diode D4 serves as the positive terminal of the output of the first phase circuit 101;

The second phase circuit 102 is composed of the second phase winding N, the fifth diode D5, the sixth diode D6, the seventh diode D7, the eighth diode D8, the third switching tube V3, the fourth switching tube V4, the third capacitor C3, and the fourth capacitor C4, one end of the second phase winding N is connected to the anode of the eighth diode D8, and is used as the input positive end of the second phase circuit 102, and the other end of the second phase winding N is connected to the fifth and second The anode of the pole tube D5, the anode of the fourth switch tube V4, one end of the fourth capacitor C4, the cathode of the fifth diode D5 is connected to the anode of the third switch tube V3, one end of the third capacitor C3, and the cathode of the third switch tube V3 is connected to the sixth diode The cathode of the tube D6 is used as the input negative terminal of the second phase circuit 102. The anode of the sixth diode D6 is connected to the other end of the third capacitor C3, the cathode of the fourth switch tube V4, the cathode of the seventh diode D7, and the cathode of the seventh diode D6. The anode of D7 is connected to the other end of the fourth capacitor C4, and serves as the output negative terminal of the second phase circuit 102, and the cathode of the eighth diode D8 serves as the output positive terminal of the second phase circuit 102;

The third phase circuit 103 is composed of the third phase winding P, the ninth diode D9, the tenth diode D10, the eleventh diode D11, the twelfth diode D12, the fifth switching tube V5, the sixth The switching tube V6, the fifth capacitor C5, and the sixth capacitor C6 are composed. One end of the third phase winding P is connected to the anode of the twelfth diode D12, and is used as the positive end of the third phase circuit 103 input, and the other end of the third phase winding P is connected to The anode of the ninth diode D9, the anode of the sixth switching tube V6, one end of the sixth capacitor C6, the cathode of the ninth diode D9 is connected to the anode of the fifth switching tube V5, one end of the fifth capacitor C5, and the cathode of the fifth switching tube V5 is connected to the fifth switching tube V5. The cathode of the tenth diode D10 is used as the input negative terminal of the third phase circuit 103. The anode of the tenth diode D10 is connected to the other end of the fifth capacitor C5, the cathode of the sixth switching tube V6, and the cathode of the eleventh diode D11. The anode of the eleventh diode D11 is connected to the other end of the sixth capacitor C6, and serves as the negative end of the output of the third phase circuit 103, and the cathode of the twelfth diode D12 serves as the positive end of the output of the third phase circuit 103;

The excitation charging and energy feeding circuit 2 is composed of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10, the thirteenth diode D13, the fourteenth diode D14, the seventh switch tube V7, Eighth switch tube V8, ninth switch tube V9, tenth switch tube V10, eleventh switch tube V11, twelfth switch tube V12, thirteenth switch tube V13, fourteenth switch tube V14, transformer T, inductor Composed of L, one end of the seventh capacitor C7, one end of the ninth capacitor C9, the cathode of the thirteenth diode D13, and the anode of the fifteenth switching tube V15 are connected, and are used as the positive end of the excitation charging and energy feeding circuit 2 input, and the eighth capacitor C8 One end, one end of the tenth capacitor C10, the anode of the fourteenth diode D14, and the cathode of the sixteenth switch tube V16 are connected, and are used as the input negative end of the excitation charging and energy feeding circuit 2, and one end of the secondary side winding N2 of the transformer T is connected to the seventh The other end of the capacitor C7, the anode of the thirteenth diode D13, the cathode of the fifteenth switch tube V15, the other end of the eighth capacitor C8, the cathode of the fourteenth diode D14, and the anode of the sixteenth switch tube V16 are connected, and the transformer T2 The other end of the secondary winding N2 is connected to the other end of the ninth capacitor C9 and the other end of the tenth capacitor C10, and one end of the primary winding N1 of the transformer T is connected to the cathode of the seventh switching tube V7, the anode of the eighth switching tube V8, and the anode of the ninth switching tube V9 The cathode of the tenth switching tube V10 is connected, the other end of the primary side winding N1 of the transformer T is connected to the cathode of the eleventh switching tube V11, the anode of the twelfth switching tube V12, the anode of the thirteenth switching tube V13, and the cathode of the fourteenth switching tube V14 , the anode of the seventh switching tube V7, the cathode of the eighth switching tube V8, the anode of the eleventh switching tube V11, and the cathode of the twelfth switching tube V12 are connected, and connected to one end of the inductor L, and the other end of the inductor L is used as an excitation charging and energy feeding circuit 2. Output the positive terminal, the cathode of the ninth switching tube V9, the anode of the tenth switching tube V10, the cathode of the thirteenth switching tube V13, and the anode of the fourteenth switching tube V14 are connected, and serve as the negative terminal of the excitation charging and energy feeding circuit 2 output.

According to the control method of the direct high-voltage output doubly-fed switched reluctance generator converter system of this embodiment, during the operation of the switched reluctance generator, according to the rotor position information, when the first phase winding M needs to be put into operation, the first When the phase circuit 101 is put into operation, the first is the excitation stage, the first switching tube V1 and the second switching tube V2 are turned on at the same time to form two loops, the first loop is the excitation loop: X-M-V2-C1-V1-X, The first capacitor C1 is in the discharge state, so in fact the battery X and the first capacitor supply power to the first phase winding M for excitation, so it has the effect of strengthening the excitation. The second formed circuit is: X-D4-C0-C2- V2-C1-V1-X, the meaning of this loop is that the first capacitor C1, the second capacitor C2, and the storage battery X jointly send electric energy to the output side of the switched reluctance generator of the present invention, and charge the output capacitor C0 at the same time, it can be seen that the output At this time, the terminal voltage is the sum of the respective voltages of the battery X, the first capacitor C1, and the second capacitor C2, so that the output voltage is much larger than the voltage of the battery X, and the voltage is directly boosted. At this stage, the first diode D1, the second capacitor Both the second diode D2 and the third diode D3 are reverse biased and cut off; when the excitation phase ends according to the rotor position information, the first switching tube V1 and the second switching tube V2 are disconnected to enter the power generation phase. Two other different circuits are formed. The first circuit is: X-M-D1-C1-D2-X. At this time, the storage battery X and the energy storage released by the first phase winding M are connected in series to charge the first capacitor C1 together. The second The circuit is: X-M-C2-D3-D2-X. At this time, the storage battery X and the energy storage released by the first phase winding M are connected in series to charge the second capacitor C2. In addition, the output side is controlled by the output capacitor C0 at this time. It can be seen that when the first capacitor C1 and the second capacitor C2 are large enough, the voltage across the first capacitor C1 is obviously greater than the voltage across the battery X, and the voltage across the second capacitor C2 is the same as the voltage across the first capacitor C1. The voltages are equal, so combined with the circuit characteristics of the excitation stage, the output side voltage of the switched reluctance generator in this embodiment is at least 3 times higher than the voltage of the battery X, and in view of the conventional switched reluctance generator system, the phase winding itself The output voltage of a separate power generation is greater than the excitation voltage, that is, the actual situation of the battery X voltage, so in practice, under this excitation and power generation process, the output voltage of the output capacitor C0 side is at least 4 times greater than the battery X voltage, but this high rise In the process of voltage, there is no special boost circuit, but it is realized by the excitation and power generation of each phase winding;

According to the rotor position information, when the second phase circuit 102 and the third phase circuit 103 need to be put into operation respectively, their working process is exactly the same as that of the first phase circuit 101. The specific corresponding relationship of the switching devices is: the third switching tube V3, The fifth switching tube V5 corresponds to the first switching tube V1, the fourth switching tube V4 and the sixth switching tube V6 correspond to the second switching tube V2, and the corresponding relationship of the other devices is: the second phase winding N, the third phase winding P corresponding to the first In the phase winding M, the fifth diode D5 and the ninth diode D9 correspond to the first diode D1, the sixth diode D6 and the tenth diode D10 correspond to the second diode D2, and the third capacitor C3 , the fifth capacitor C5 corresponds to the first capacitor C1, the seventh diode D7, the eleventh diode D11 correspond to the third diode D3, the fourth capacitor C4, the sixth capacitor C6 correspond to the second capacitor C2, the eighth The diode D8 and the twelfth diode D12 correspond to the fourth diode D4;

When it is detected that the power of the battery X is lower than the lower limit, the excitation charging and energy feeding circuit 2 starts to work in the forward direction to charge the battery X. The structure on the right side of the transformer T of the excitation charging and energy feeding circuit 2 is equivalent to a half-bridge inverter. The structure on the left side is equivalent to interleaved rectification, and the output side is equivalent to a DC current source, which facilitates continuous constant current charging of battery X. The excitation electric energy, the excitation charging and the forward conversion of the energy feeding circuit 2 are specifically divided into the following eleven switching work steps, and are circulated:

Step 1: the eighth switch tube V8 and the fourteenth switch tube V14 are simultaneously turned on and turned on;

Step 2: the twelfth switch tube V12 is turned on and turned on;

Step 3: The eighth switch tube V8 is disconnected;

Step 4: the tenth switching tube V10 and the sixteenth switching tube V16 are turned on and turned on;

Step five: the fourteenth switching tube V14 is disconnected;

Step 6: The sixteenth switching tube V16 is disconnected;

Step 7: The eighth switch tube V8 is turned on and turned on;

Step 8: The twelfth switching tube V12 is disconnected;

Step 9: the fourteenth switching tube V14 and the fifteenth switching tube V15 are turned on and turned on;

Step 10: The tenth switch tube V10 is disconnected;

Step eleven: the fifteenth switching tube V15 is disconnected;

Based on the above working steps, the duty cycle of each switching tube is adjustable within its adjustable range. The principle is to meet the above steps and meet the requirements for charging the battery X and the excitation of the main converter circuit 1;

When the power of the battery X is higher than the lower limit value, and the electric energy required by the output capacitor C0 side is too large and the main converter circuit 1 cannot meet the demand, the excitation charging and energy feeding circuit 2 will work in reverse and convert the electric energy of the battery X to the On the output capacitor C0 side, for example, when there is a need for low-voltage ride-through such as a short-circuit fault voltage drop under the premise of grid connection, or when the load is too large, this method can be used in addition to the output power of each phase circuit, and the battery X also feeds back energy. In the double-fed mode, when the excitation charging and energy feeding circuit 2 reverse current conversion, the structure on the left side of the transformer T is equivalent to double-bridge inverter, and the structure on the right is equivalent to step-up rectification, and the excitation charging and energy feeding circuit 2 are reversed. It is divided into the following eleven switching steps when working in the direction of the variable flow, and it is cycled:

Step 1: the ninth switching tube V9 and the eleventh switching tube V11 are closed and conducting;

Step 2: the thirteenth switching tube V13 is turned on and turned on;

Step 3: the ninth switching tube V9 is disconnected;

Step 4: the seventh switch tube V7 and the sixteenth switch tube V16 are turned on and turned on;

Step five: the eleventh switching tube V11 is disconnected;

Step 6: The sixteenth switching tube V16 is disconnected;

Step 7: The ninth switch tube V9 is turned on and turned on;

Step 8: The thirteenth switching tube V13 is disconnected;

Step 9: the eleventh switching tube V11 and the fifteenth switching tube V15 are turned on and turned on;

Step 10: The seventh switching tube V7 is disconnected;

Step eleven: the fifteenth switching tube V15 is disconnected;

Based on the above reverse conversion working steps of the excitation charging and energy feeding circuit 2, the duty cycle of each switch tube can be adjusted within its adjustable range so as to meet the demand for the power supply voltage on the side of the output capacitor C0.

All the switching tubes in this embodiment are full-control power electronic switching devices, and each capacitor and inductance are large enough to keep the corresponding voltage and current basically stable.

Claims (2)

1. a kind of direct high voltage exports double-fed switch reluctance generator converter system, characterized in that include: battery, unsteady flow Main circuit, excitation charging and energy regenerative circuit, output capacitor, the accumulator anode and cathode both ends are separately connected the main electricity of the unsteady flow Road inputs positive and negative end, while being separately connected the excitation charging and energy regenerative circuit output positive and negative end, unsteady flow main circuit Output positive and negative end is separately connected excitation charging and inputs positive and negative end with energy regenerative circuit, while being separately connected output capacitor Positive and negative end；

Unsteady flow main circuit is made of the first circuitry phase, the second circuitry phase, third circuitry phase, and three's structure is identical, they are each From input positive and negative end be respectively connected with, their output positive and negative end is respectively connected with, their input positive and negative end Respectively as the input positive and negative end of unsteady flow main circuit, their output positive and negative end is respectively as the defeated of unsteady flow main circuit Positive and negative end out；

First circuitry phase by the first phase winding, first diode, the second diode, third diode, the 4th diode, First switch tube, second switch, first capacitor device, the second capacitor composition, first phase winding one end connection described the Four diode anodes, and positive terminal is inputted as the first circuitry phase, the first phase winding other end connects the first diode sun Pole, the second switch tube anode, second capacitor one end, first diode cathode connect the first switch tube sun Pole, first capacitor device one end, first switch tube cathode connect second diode cathode, and defeated as the first circuitry phase Enter negative pole end, the second diode anode connects the first capacitor device other end, second switch tube cathode, third diode yin Pole, third diode anode connect the second capacitor other end, and as the first circuitry phase output negative pole end, the 4th diode yin Pole is as the first circuitry phase output cathode end；

Second circuitry phase by the second phase winding, the 5th diode, the 6th diode, the 7th diode, the 8th diode, Third switching tube, the 4th switching tube, third capacitor, the 4th capacitor composition, second phase winding one end connection described the Eight diode anodes, and positive terminal is inputted as the second circuitry phase, the second phase winding other end connects the 5th diode sun Pole, the 4th the switch tube anode, described 4th capacitor one end, the 5th diode cathode connect the third switching tube sun Pole, third capacitor one end, third switch tube cathode and connect the 6th diode cathode, and defeated as the second circuitry phase Enter negative pole end, the 6th diode anode connects the third capacitor other end, the 4th switch tube cathode, the 7th diode yin Pole, the 7th diode anode connect the 4th capacitor other end, and as the second circuitry phase output negative pole end, the 8th diode yin Pole is as the second circuitry phase output cathode end；

The third circuitry phase is by third phase winding, the 9th diode, the tenth diode, the 11st diode, the 12nd Pole pipe, the 5th switching tube, the 6th switching tube, the 5th capacitor, the 6th capacitor composition, third phase winding one end connects institute The 12nd diode anode is stated, and inputs positive terminal, third phase winding other end connection the described 9th 2 as third circuitry phase Pole pipe anode, the 6th the switch tube anode, described 6th capacitor one end, the 9th diode cathode connection the 5th switch Tube anode, described 5th capacitor one end, the 5th switch tube cathode connect the tenth diode cathode, and as third phase electricity Road inputs negative pole end, and the tenth diode anode connects the 5th capacitor other end, the 6th switch tube cathode, the 11st pole Tube cathode, the 11st diode anode connect the 6th capacitor other end, and as third phase circuit output negative pole end, and the 12nd Diode cathode is as third phase circuit output positive terminal；

Excitation charging is with energy regenerative circuit by the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 13rd Pole pipe, the 14th diode, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, the 11st switching tube, 12 switching tubes, the 13rd switching tube, the 14th switching tube, transformer, inductance composition, it is described 7th capacitor one end, described 9th capacitor one end, the 13rd diode cathode, it is described 15th switch tube anode connection, and as excitation charging with Energy regenerative circuit inputs positive terminal, described 8th capacitor one end, described tenth capacitor one end, the 14th diode sun Tube cathode connection is closed in pole, the sixteenmo, and inputs negative pole end, the transformer secondary with energy regenerative circuit as excitation charging Side winding one end and the 7th capacitor other end, the 13rd diode anode, the 15th switch tube cathode, the 8th capacitor are another Tube anode connection is closed at end, the 14th diode cathode, sixteenmo, and the Circuit Fault on Secondary Transformer winding other end and the 9th capacitor are another One end, the connection of the tenth capacitor other end, transformer primary winding one end are opened with the 7th switch tube cathode, the described 8th Close tube anode, the 9th switch tube anode, the tenth switch tube cathode connection, the transformer primary winding other end and institute State the 11st switch tube cathode, the 12nd switch tube anode, the 13rd the switch tube anode, the 14th switching tube Cathode connection, the 7th switch tube anode, the 8th switch tube cathode, the 11st switch tube anode, the 12nd switch tube cathode connection, And connect with described inductance one end, the inductance other end is as excitation charging and energy regenerative circuit output positive terminal, the 9th switching tube yin Pole, the tenth switch tube anode, the 13rd switch tube cathode, the 14th switch tube anode connection, and as excitation charging and energy regenerative Circuit output negative pole end.

2. a kind of controlling party of direct high voltage output double-fed switch reluctance generator converter system according to claim 1 Method, characterized in that in switch reluctance generator operation, according to rotor position information, when the first phase winding need to devote oneself to work, the One-phase circuit is devoted oneself to work, and is the excitation stage first, and first switch tube and second switch are closed at conducting, according to rotor position At the end of confidence ceases the excitation stage, first switch tube and second switch are disconnected, into power generating stage；When the second phase winding needs to throw It is that third switching tube and the 4th switching tube are closed at conducting and enter the excitation stage first accordingly, according to rotor when entering work At the end of the location information excitation stage, third switching tube and the 4th switching tube are disconnected, into power generating stage；When third phase winding needs When devoting oneself to work, first it is accordingly the 5th switching tube and the 6th switching tube is closed at conducting and enters the excitation stage, according to turns At the end of the sub- location information excitation stage, the 5th switching tube and the 6th switching tube are disconnected, into power generating stage；

When detecting accumulator electric-quantity lower than lower limit value, excitation charging starts positive unsteady flow with energy regenerative circuit and works, to electric power storage Pond charging then provides excitation electric energy when unsteady flow main circuit is in running order simultaneously, and excitation charging becomes with energy regenerative circuit forward direction It is divided into following 11 switches work step when flowing work, and recycles:

Step 1: in the 8th switching tube and the closure conducting of the 14th switching tube；

Step 2: the 12nd switching tube closure conducting；

Step 3: the 8th switching tube disconnects；

Step 4: the tenth switching tube and sixteenmo close pipe closure conducting；

Step 5: the 14th switching tube disconnects；

Step 6: sixteenmo closes pipe and disconnects；

Step 7: the 8th switching tube closure conducting；

Step 8: the 12nd switching tube disconnects；

Step 9: the 14th switching tube and the closure conducting of the 15th switching tube；

Step 10: the tenth switching tube disconnects；

Step 11: the 15th switching tube disconnects；

Based under the above work step, each switching tube duty ratio is adjustable in its adjustable extent, to meet to storage Battery charging and unsteady flow main circuit excitation demand；

When accumulator electric-quantity is higher than lower limit value, and electric energy needed for output capacitor side is excessive and unsteady flow main circuit is unable to satisfy, Excitation charging works with the reversed unsteady flow of energy regenerative circuit, and battery electric energy unsteady flow is supplied to output capacitor side, excitation charging with Energy regenerative circuit reversed unsteady flow is divided into following 11 switches work step when working, and recycles:

Step 1: in the 9th switching tube and the closure conducting of the 11st switching tube；

Step 2: the 13rd switching tube closure conducting；

Step 3: the 9th switching tube disconnects；

Step 4: the 7th switching tube and sixteenmo close pipe closure conducting；

Step 5: the 11st switching tube disconnects；

Step 6: sixteenmo closes pipe and disconnects；

Step 7: the 9th switching tube closure conducting；

Step 8: the 13rd switching tube disconnects；

Step 9: the 11st switching tube and the closure conducting of the 15th switching tube；

Step 10: the 7th switching tube disconnects；

Step 11: the 15th switching tube disconnects；

Based on the charging of the above excitation under the reversed unsteady flow work step of energy regenerative circuit, each switching tube duty ratio is adjustable at its You are adjustable for adjusting range, to meet the needs to the power supply of output capacitance side.