CN103701184B - Gas turbine charging controls and protective device - Google Patents
Gas turbine charging controls and protective device Download PDFInfo
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- CN103701184B CN103701184B CN201310683785.2A CN201310683785A CN103701184B CN 103701184 B CN103701184 B CN 103701184B CN 201310683785 A CN201310683785 A CN 201310683785A CN 103701184 B CN103701184 B CN 103701184B
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Abstract
The invention discloses the charging of a kind of gas turbine to control and protective device, comprising: differential protector and field regulator; Differential protector be provided with the transmission of electricity terminal of the generator for connecting gas turbine first input end mouth, for the first output port of connecting electricity accumulating unit and the judgement control unit be located between first input end mouth and the first output port; Judge control unit, for controlling the break-make between first input end mouth and the first output port according to the comparative result of the output voltage of generator and the residual voltage of electricity accumulating unit; Field regulator is powered to the magnet exciting coil of generator with the output voltage controlling generator for the magnet exciting coil of the transmission of electricity terminal and generator that connect generator.The generator that the present invention adopts gas turbine to carry charges to electricity accumulating unit; to supplement the electricity that electricity accumulating unit consumes in time, and cut off charging circuit in time, avoid electricity accumulating unit to generator reverse charge; both protect generator, prevent again electricity accumulating unit overcharge.
Description
Technical field
The present invention relates to gas turbine control field, especially, relate to the charging of a kind of gas turbine and control and protective device.
Background technology
Ground gas turbine can be used as armored vehicle and Small Vessel power, and its distributed energy resource system formed as core engine has broad application prospects in fields such as electric power, oil, chemical industry, metallurgy, boats and ships, railway locomotive power.Certain type gas turbine in use needs with storage battery as power supply, with satisfied without Fast starting when external power supply and loading.But existing battery capacity is limited, and particularly gas turbine needs heavy-current discharge in starting process, therefore storage battery needs timely boost charge.In prior art, gas turbine storage battery all adopts the mode of floating charge, if do not charge control and safeguard measure, on the one hand, if carry out boost charge not in time when battery tension is too low, then gas turbine next time start time easily because electric power deficiency causes starting failure; On the other hand, after storage battery is full of electricity, cuts off charging circuit not in time, easily makes overcharge of a battery, the heating of storage battery caused by overcharge or overdischarge, its electrolyte may be caused to gasify to such an extent as to damage, thus affecting its useful life and serviceability.Therefore, the device providing a kind of storage battery to gas turbine to carry out accurately charging control and protection is needed badly.
Summary of the invention
The object of the invention is that providing a kind of gas turbine to charge controls and protective device, there is to solve storage battery in existing gas turbine the technical problem causing starting failure and overcharge to cause useful life impaired of not charging in time.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of gas turbine charging controls and protective device, comprising: differential protector and field regulator;
Differential protector be provided with the transmission of electricity terminal of the generator for connecting gas turbine first input end mouth, for the first output port of connecting electricity accumulating unit and the judgement control unit be located between first input end mouth and the first output port; Judge control unit, for controlling the break-make between first input end mouth and the first output port according to the comparative result of the output voltage of generator and the residual voltage of electricity accumulating unit;
Field regulator is powered to the magnet exciting coil of generator with the output voltage controlling generator for the magnet exciting coil of the transmission of electricity terminal and generator that connect generator.
Further, the first branch road and second of powering that field regulator comprises for the magnet exciting coil of the transmission of electricity terminal and generator connecting generator is powered branch road, and the first power supply branch road and second branch circuit parallel connection of powering is arranged;
First power supply branch road is provided with the first normally closed switch element;
Second power supply branch road is provided with the second switch unit often opened, and the control end of second switch unit connects voltage comparator circuit, and voltage comparator circuit is according to the action of the output voltage control second switch unit of generator.
Further, second switch unit is triode, the base stage of triode connects voltage comparator circuit, the reference power supply end of voltage comparator circuit and comparative voltage input connect the transmission of electricity terminal of generator, when the output voltage of generator is less than the first predetermined threshold value, the lead-out terminal of voltage comparator circuit is high-impedance state; When the output voltage of generator is more than or equal to the first predetermined threshold value and is less than the second predetermined threshold value, the lead-out terminal of voltage comparator circuit is low resistance state; When the output voltage of generator is more than or equal to the second predetermined threshold value, the lead-out terminal of voltage comparator circuit is high-impedance state.
Further, field regulator comprises discharge circuit, and discharge circuit is the diode be connected with the transmission of electricity terminal of generator, during for preparing outwards to generate electricity at generator, by the output voltage of generator and exciting voltage zero setting.
Further, judge that control unit comprises main relay, main relay is for controlling the break-make between first input end mouth and the first output port, the control end of main relay is connected with the normally opened contact of a magnetic latching relay, the coil two ends of magnetic latching relay connect first input end mouth, the first output port respectively, and magnetic latching relay controls the action of main relay according to the comparative result of the output voltage of generator and the residual voltage of electricity accumulating unit.
Further; differential protector is also provided with control port; auxiliary relay is provided with, the signal controlling of the controlled port input of control end of auxiliary relay on the coil and first input end mouth connection line of magnetic latching relay and/or on the coil of magnetic latching relay and the connection line of the first output port.
Further, the circuit that the transmission of electricity terminal of generator is connected with electricity accumulating unit is provided with shunt, and the current signal of shunt collection is connected with ammeter, and the voltage signal of shunt collection is connected with voltmeter.
The present invention has following beneficial effect:
Gas turbine charging of the present invention controls and protective device, the generator adopting gas turbine to carry charges to electricity accumulating unit, to supplement the electricity that electricity accumulating unit consumes in time, and by the magnet exciting coil of field regulator by the output voltage supply generator of generator, the residual voltage of the output voltage and electricity accumulating unit that compare generator by differential protector controls the charging to electricity accumulating unit, and cut off charging circuit in time, avoid electricity accumulating unit to generator reverse charge, both generator was protected, prevent again electricity accumulating unit overcharge, be convenient to accurately to charge control to electricity accumulating unit, improve the serviceability of electricity accumulating unit and the starting success rate of gas turbine.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the principle schematic of preferred embodiment of the present invention gas turbine charging control and protective device;
Fig. 2 is the electrical block diagram of preferred embodiment of the present invention gas turbine charging control and protective device; And
Fig. 3 is the electrical block diagram of differential protector in the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
With reference to Fig. 1, the preferred embodiments of the present invention provide the charging of a kind of gas turbine and control and protective device, comprising: differential protector and field regulator.Wherein, differential protector be provided with the transmission of electricity terminal of the generator for connecting gas turbine first input end mouth, for the first output port of connecting electricity accumulating unit and the judgement control unit be located between first input end mouth and the first output port; Judge control unit, for controlling the break-make between first input end mouth and the first output port according to the comparative result of the output voltage of generator and the residual voltage of electricity accumulating unit; Field regulator is powered to the magnet exciting coil of generator with the output voltage controlling generator for the magnet exciting coil of the transmission of electricity terminal and generator that connect generator.The embodiment of the present invention, when gas turbine starts successfully, charging controls and namely protective device enters operating state, generator proceeds to generating state by motoring condition, the output voltage of generator is inputed to magnet exciting coil to produce exciting current by field regulator, increase gradually to make the output voltage of generator, when the output voltage of generator is greater than the residual voltage of electricity accumulating unit, judgement control unit conducting in differential protector, the transmission of electricity terminal of generator is connected with electricity accumulating unit, formed to the charging circuit of electricity accumulating unit charging, and the voltage of electricity accumulating unit is higher than the transmission voltage of generator, when making electricity accumulating unit oppositely to generator charging, judge that control unit cuts off charging circuit in time, to protect generator and to avoid electricity accumulating unit overcharge.The generator that the embodiment of the present invention adopts gas turbine to carry charges to electricity accumulating unit, to supplement the electricity that electricity accumulating unit consumes in time, and by the magnet exciting coil of field regulator by the output voltage supply generator of generator, the residual voltage of the output voltage and electricity accumulating unit that compare generator by differential protector controls the charging to electricity accumulating unit, and cut off charging circuit in time, avoid storage battery to generator reverse charge, both generator was protected, prevent again electricity accumulating unit overcharge, be convenient to accurately to charge control to electricity accumulating unit, improve the serviceability of electricity accumulating unit and the starting success rate of gas turbine.
Fig. 2 shows the electrical block diagram of preferred embodiment of the present invention gas turbine charging control and protective device.Preferably, the first branch road and second of powering that field regulator comprises for the magnet exciting coil of the transmission of electricity terminal and generator connecting generator is powered branch road, and the first power supply branch road and second branch circuit parallel connection of powering is arranged; First power supply branch road is provided with the first normally closed switch element; Second power supply branch road is provided with the second switch unit often opened, and the control end of second switch unit connects voltage comparator circuit, and voltage comparator circuit is according to the action of the output voltage control second switch unit of generator.With reference to Fig. 2, in the present embodiment, the first power supply branch road comprises relay K 2, is formed by+P → K2/5-4 → KP9/3-4; Second power supply branch road comprises triode V9 ~ V11 in parallel, and the base stage of triode V9 ~ V11 all connects voltage comparator circuit.Wherein, the reference power supply end 1/2 of voltage comparator circuit connects the transmission of electricity terminal of generator, for voltage comparator circuit provides reference voltage, the comparative voltage input of voltage comparator circuit connects the transmission of electricity terminal of generator, the output voltage of generator and the built-in voltage threshold of voltage comparator circuit to be compared.Voltage comparator circuit is built-in with the first predetermined threshold value and the second predetermined threshold value, and the second predetermined threshold value is greater than the first predetermined threshold value.When the output voltage of generator is less than the first predetermined threshold value, the lead-out terminal of voltage comparator circuit is high-impedance state; When the output voltage of generator is more than or equal to the first predetermined threshold value and is less than the second predetermined threshold value, the lead-out terminal of voltage comparator circuit is low resistance state; When the output voltage of generator is more than or equal to the second predetermined threshold value, the lead-out terminal of voltage comparator circuit is high-impedance state.
Preferably, field regulator comprises discharge circuit, and discharge circuit is the diode be connected with the transmission of electricity terminal of generator, during for preparing outwards to generate electricity at generator, by the output voltage of generator and exciting voltage zero setting.With reference to Fig. 2, in the present embodiment, discharge circuit comprises two groups, and one group is diode V1 ~ V7 in parallel, and another group is diode V12.
With reference to Fig. 3, preferably, the differential protector in the present embodiment is provided with first input end mouth, the first output port, the positive incoming end of power supply, earth terminal, and the interface definition of differential protector is as follows:
CETb: the first output port
Γ EH: first input end mouth
B: control port
+: the positive incoming end of power supply
-: earth terminal
A, Б, Л, C: self-defined port
In the present embodiment, judge that control unit comprises main relay P, main relay P is for controlling the break-make between first input end mouth Γ EH and the first output port CETb, the control end of main relay P is connected with the normally opened contact of a magnetic latching relay J, the coil two ends of magnetic latching relay J connect first input end mouth Γ EH, the first output port CETb, magnetic latching relay J control main relay P action according to the comparative result of the output voltage of generator and the residual voltage of electricity accumulating unit respectively.
Preferably, auxiliary relay is provided with, the signal controlling that the controlled port B of control end of auxiliary relay inputs on the coil and first input end mouth Γ EH connection line of magnetic latching relay J and/or on the coil of magnetic latching relay J and the connection line of the first output port CETb.In the present embodiment, the coil of magnetic latching relay J and the connection line of first input end mouth Γ EH are provided with relay P3, and the coil of magnetic latching relay J and the connection line of the first output port CETb are provided with relay P1.Like this, make, main relay P, before preparation, first must control auxiliary relay through control port B and connect the coil of magnetic latching relay J and the connection of the connection of first input end mouth Γ EH or the coil of magnetic latching relay J and the first output port CETb.
In the present embodiment, charging controls and the course of work of protective device mainly comprises double teacher, and with reference to Fig. 2, its course of work is specific as follows:
1) gas turbine starts successfully, gas turbine starting circuit has cut off armature supply and the exciting current path of generator (generator at start-up period as motor work), now, generator is in High Rotation Speed state, and its armature coil and magnet exciting coil produce very high back-emf, in parallel respectively by V1 ~ V7, V12 two groups of diode discharges, make generator output voltage VF and exciting voltage VL will be all 0V, it is 0V that+P locates voltage, therefore relay K 2 is in release condition, now starter controller KP9 is in release condition, form path+P → K2/5-4 → KP9/3-4 and directly put on magnet exciting coil, for generator outwards generates electricity ready.
2) T0 ~ T1 stage, generator starts generating, and its output voltage VF increases gradually, and VF < first predetermined threshold value.
In this stage, K2, KP9 are in release condition, and VF passes through+P → K2/5-4 → KP9/3-4 and directly puts on magnet exciting coil, thus form IL and continue to rise.Because of voltage < first predetermined threshold value of voltage comparator circuit input pin 8, its output pin 3 pin is high-impedance state, makes three triode V9 ~ V11 in parallel be in cut-off state.
3) T1 ~ T2 stage, the output voltage VF of generator continues to increase, VF < VCE (VCE is the residual voltage of storage battery).
When VF=the first predetermined threshold value, voltage=the first predetermined threshold value of voltage comparator circuit input pin 8, in the present embodiment, getting the first predetermined threshold value is 11V, its 3 pin changes low resistive state into, thus make three triode V9 ~ V11 in parallel be in saturation conduction state, and VF can't make K2 action, now IL is by K2, V9 ~ V112 bar path is formed, K4 is in release condition (being controlled by starter box V+), + P → K4/2-1 → KM1/B path makes the auxiliary relay adhesive of differential protector KM1, for the main relay P adhesive of KM1 is got ready, but due to VF < VCE, therefore can not charge.
4) T2 ~ T3 stage, the output voltage VF of generator continues to increase, VCE≤VF < second predetermined threshold value.
Now, the main relay P adhesive of KM1, generator starts as charge in batteries, and voltage comparator circuit 3 pin is still low resistive state, and IL is still formed (K2 has been in suction and state) by triode path.
5) T3 ~ T4 stage, now output voltage VF=second predetermined threshold value of generator.
When VF=the second predetermined threshold value, in the present embodiment, getting the second predetermined threshold value is 27.66V, and 3 pin of voltage comparator circuit change high-impedance state into, thus three triode V9 ~ V11 in parallel are ended, cut off triode path, and now K2 still locates attracting state, two formation paths of IL all disconnect, generator loses exciting current, output voltage drops to 0, and the charging of storage battery terminates, and circuit returns to T0 state.
In the embodiment of the present invention, the operation principle of differential protector is as follows: after control port B termination enters voltage signal; relay P3 works; relay P4 keeps initial condition; magnetic latching relay J coil two ends are respectively output voltage and the battery tension signal of generator; when generator voltage reaches certain difference higher than battery tension; the magnetic latching relay J closing of contact; main relay P, relay P1, relay P2 start working in succession, and generator and storage battery are connected and started as charge in batteries.If when engine speed change makes generator output voltage drop to lower than battery tension; reflux can be produced from storage battery to generator; when this reflux reaches certain value; magnetic latching relay J contact disconnects; main relay P, relay P1, relay P2 quit work; generator and storage battery disconnect, and can protect generator very well like this.
Known from the above description, in preferred embodiment, when the output voltage of generator reaches the second predetermined threshold value, the path that triode consists of voltage comparator circuit by field regulator, namely the second power supply branch road disconnects, and the relay K 2 on the first power supply branch road is also because of adhesive break contact, makes generator lose exciting current, stops generating; Simultaneously; in the process of charging a battery; magnetic latching relay J in differential protector is by the residual voltage of the output voltage and storage battery that compare generator; when the output voltage of generator drops to lower than battery tension; reflux can be produced from storage battery to generator; also make magnetic latching relay J contact disconnect, thus interrupt the charging circuit of storage battery, to protect generator.Therefore in the embodiment of the present invention, have employed second class protection mechanism; avoid that the output voltage of generator is excessive causes accumulator super-charge; also charging path is cut off in time by voltage compare; avoid storage battery to the reverse charging of generator; protection generator, thus improve reliability and the useful life of generator and storage battery in gas turbine.
Preferably, with reference to Fig. 1, the circuit that the transmission of electricity terminal of generator is connected with electricity accumulating unit is provided with shunt, and the current signal of shunt collection is connected with ammeter, and the voltage signal of shunt collection is connected with voltmeter.Ammeter is for monitoring the charging current of generator, and voltmeter is for monitoring the output voltage of generator.
In sum, the generator that the embodiment of the present invention adopts gas turbine to carry charges to electricity accumulating unit, to supplement the electricity that electricity accumulating unit consumes in time, and by the magnet exciting coil of field regulator by the output voltage supply generator of generator, the residual voltage of the output voltage and electricity accumulating unit that compare generator by differential protector controls the charging to electricity accumulating unit, and cut off charging circuit in time, avoid electricity accumulating unit to generator reverse charge, both generator was protected, prevent again electricity accumulating unit overcharge, be convenient to accurately to charge control to electricity accumulating unit, improve the serviceability of electricity accumulating unit and the starting success rate of gas turbine.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. gas turbine charging controls and a protective device, it is characterized in that, comprising: differential protector and field regulator;
Described differential protector be provided with the transmission of electricity terminal of the generator for connecting described gas turbine first input end mouth, for the first output port of connecting electricity accumulating unit and the judgement control unit be located between described first input end mouth and described first output port; Described judgement control unit, for controlling the break-make between described first input end mouth and described first output port according to the comparative result of the output voltage of described generator and the residual voltage of described electricity accumulating unit;
Described field regulator is powered to the magnet exciting coil of described generator for the magnet exciting coil of the transmission of electricity terminal and described generator that connect described generator with the output voltage controlling described generator;
The first branch road and second of powering that described field regulator comprises for the magnet exciting coil of the transmission of electricity terminal and described generator connecting described generator is powered branch road, and described first power supply branch road and described second branch circuit parallel connection of powering is arranged;
Described first power supply branch road is provided with the first normally closed switch element;
Described second power supply branch road is provided with the second switch unit often opened, and the control end of described second switch unit connects voltage comparator circuit, the action of described voltage comparator circuit second switch unit according to the output voltage control of described generator.
2. gas turbine charging according to claim 1 controls and protective device, it is characterized in that,
Described second switch unit is triode, the base stage of described triode connects described voltage comparator circuit, the reference power supply end of described voltage comparator circuit and comparative voltage input connect the transmission of electricity terminal of described generator, when the output voltage of described generator is less than the first predetermined threshold value, the lead-out terminal of described voltage comparator circuit is high-impedance state; When the output voltage of described generator is more than or equal to the first predetermined threshold value and is less than the second predetermined threshold value, the lead-out terminal of described voltage comparator circuit is low resistance state; When the output voltage of described generator is more than or equal to the second predetermined threshold value, the lead-out terminal of described voltage comparator circuit is high-impedance state.
3. gas turbine charging according to claim 1 controls and protective device; it is characterized in that; described field regulator comprises discharge circuit; described discharge circuit is the diode be connected with the transmission of electricity terminal of described generator; during for preparing outwards to generate electricity at described generator, by the output voltage of described generator and exciting voltage zero setting.
4. gas turbine charging according to claim 1 controls and protective device, it is characterized in that,
Described judgement control unit comprises main relay, described main relay is for controlling the break-make between described first input end mouth and described first output port, the control end of described main relay is connected with the normally opened contact of a magnetic latching relay, the coil two ends of described magnetic latching relay connect described first input end mouth, described first output port respectively, and described magnetic latching relay controls the action of described main relay according to the comparative result of the residual voltage of the output voltage of described generator and described electricity accumulating unit.
5. gas turbine charging according to claim 4 controls and protective device, it is characterized in that,
Described differential protector is also provided with control port; on the coil and described first input end mouth connection line of described magnetic latching relay and/or on the coil of described magnetic latching relay and the connection line of described first output port, be provided with auxiliary relay, the control end of described auxiliary relay is by the signal controlling of described control port input.
6. the charging of the gas turbine according to any one of claim 1 to 5 controls and protective device, it is characterized in that,
The circuit that the transmission of electricity terminal of described generator is connected with described electricity accumulating unit is provided with shunt, and the current signal of described shunt collection is connected with ammeter, and the voltage signal of described shunt collection is connected with voltmeter.
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| CN201310683785.2A CN103701184B (en) | 2013-12-13 | 2013-12-13 | Gas turbine charging controls and protective device |
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| CN201310683785.2A CN103701184B (en) | 2013-12-13 | 2013-12-13 | Gas turbine charging controls and protective device |
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| CN103701184B true CN103701184B (en) | 2016-01-06 |
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| CN2057045U (en) * | 1989-07-19 | 1990-05-09 | 广西柳州汽车附件厂 | Voltage regulator for ac generator of car |
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Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |