CN114151202A - Static variable frequency starting system and control method thereof - Google Patents
Static variable frequency starting system and control method thereof Download PDFInfo
- Publication number
- CN114151202A CN114151202A CN202111264613.2A CN202111264613A CN114151202A CN 114151202 A CN114151202 A CN 114151202A CN 202111264613 A CN202111264613 A CN 202111264613A CN 114151202 A CN114151202 A CN 114151202A
- Authority
- CN
- China
- Prior art keywords
- switch
- starting
- gas turbine
- static
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005284 excitation Effects 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 238000007664 blowing Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 65
- 238000004891 communication Methods 0.000 description 7
- 230000009466 transformation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/268—Starting drives for the rotor, acting directly on the rotor of the gas turbine to be started
- F02C7/275—Mechanical drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
- F02C7/266—Electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Turbines (AREA)
Abstract
The invention provides a static frequency conversion starting system and a control method thereof, which are used for solving the starting problem of a gas turbine set, and the system comprises at least one starting circuit connected with the gas turbine set, wherein each starting circuit respectively comprises an input switch, a transformer, a static frequency converter and an output switch which are sequentially connected; each gas turbine unit is respectively matched with a grounding switch and an excitation device; when more than two starting circuits exist, the output switches of the starting circuits are bridged by the connecting switch, and the input switch, the output switch, the grounding switch and the connecting switch are controlled to be switched on and off respectively. The method comprises a single unit starting step and a cross unit starting step. The invention can realize the simultaneous variable frequency starting operation of a single set or a plurality of sets of units, has the characteristics of simple topological structure, flexible configuration, perfect locking, high reliability, strong expandability and the like, can meet the requirements of redundant operation and independent maintenance, and is suitable for the field of static variable frequency starting of the gas turbine unit.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a static variable frequency starting system and a control method thereof.
Background
The gas turbine set takes combustion of natural gas as power, but cannot be started automatically due to overlarge starting torque of the gas turbine, and an external power is needed to rotate the whole shafting. The variable frequency starting of the combustion engine refers to that a static variable frequency starting device (SFC or LCI for short) is used for providing power for a generator to drive a shaft system of the combustion engine to rotate until a certain rotating speed is reached. The variable frequency starting system of the gas turbine generator set is one of key devices of the gas turbine generator set, so that the strategy research and control requirements of a third-party device for replacing the device of the system are very high. The variable frequency starting system of the GE-9F unit is an LS2100 system matched with GE production, is integrated with a combustion engine control system into a whole, is a totally-enclosed control system, and is not open to third-party equipment. Currently, there is no third party alternative to this for the equipment system and control method.
Disclosure of Invention
The invention provides a static variable frequency starting system and a control method thereof, which are used for solving the starting problem of a gas turbine set, and have the following specific technical contents:
the static variable frequency starting system comprises at least one starting circuit connected with a gas turbine set, wherein each starting circuit comprises an input switch, a transformer, a static frequency converter and an output switch which are sequentially connected; each gas turbine unit is respectively matched with a grounding switch and an excitation device; the input switch is connected with an alternating current source, the output switch is connected with the gas turbine unit, and the grounding switch grounds the input end of the gas turbine unit; when more than two starting circuits exist, the output switches of the starting circuits are bridged by the connecting switch, and the input switch, the output switch, the grounding switch and the connecting switch are controlled to be switched on and off respectively.
In one or more embodiments of the present invention, a controlled on-off isolating switch is provided between the starting line and the input end of the combustion engine set.
The static variable frequency starting control method is based on the static variable frequency starting system and comprises a single unit starting step and a cross unit starting step;
the single unit starting step executes the following operations:
s11, starting the circuit to execute self-checking, and executing the step S12 after the self-checking is passed;
s12, opening the grounding switch, closing the output switch and the input switch, and then performing step S13;
s13, starting an excitation device corresponding to the combustion engine set, and then executing the step S14;
s14, starting the static frequency converter;
the cross-unit starting step executes the following operations:
s21, the selected starting circuit executes self-test, and after the self-test is passed, the step S22 is executed:
s22, closing the connecting switch to communicate the selected starting circuit with the target engine set, and then executing the step S23;
s23, disconnecting the grounding switch connected with the target engine set, closing the output switch and the input switch of the selected starting circuit, and then executing the step S24;
s24, starting an excitation device corresponding to the target engine set, and then executing the step S25;
and S25, starting the static frequency converter of the selected starting circuit.
In one or more embodiments of the present invention, the disconnecting switch connected to the grounding switch is synchronously closed when the grounding switch is opened.
In one or more embodiments of the present invention, a plurality of information points of the static variable frequency starting system are defined in the combustion engine control system to realize access and control of the static variable frequency starting system; the information points comprise feedback input switches, output switches, isolating switches, opening/closing state information points of connecting switches, operation state information points of feedback transformers, static frequency converters and exciting devices, analog quantity information points of feedback currents, voltages and frequencies and instruction information points output to a static frequency conversion starting system.
In one or more embodiments of the present invention, in the starting operation of the gas turbine unit by the starting line, the rotor of the gas turbine unit first enters a turning state, and then the stationary frequency converter is started; when the rotating speed of the gas turbine unit is increased to a first rotating speed, the gas turbine control system sends a blowing and cleaning rotating speed instruction to enable the gas turbine unit to perform blowing and cleaning, and after blowing and cleaning are completed, the gas turbine control system controls the rotating speed of the gas turbine unit to be reduced to a second rotating speed and performs ignition; if the ignition is successful, maintaining the second rotating speed and warming up; if the ignition fails, repeating the blowing and ignition operations until the ignition is successful; after warming up is completed, the gas turbine control system sends a speed increasing instruction to the gas turbine unit, the static frequency converter is stopped when the rotating speed of the gas turbine unit reaches a third rotating speed, and then the gas turbine unit independently increases the speed to a grid-connected rotating speed.
The invention has the beneficial effects that: the system has reasonable structure and flexible and convenient use, the control process meets the requirement of a GE-9F heavy-duty gas turbine starting operation mode, the precise variable-frequency starting control of the GE-9F gas turbine is realized, the transformation scheme of home-made substitution is realized, the method can be popularized to the home-made transformation of variable-frequency starting devices of all GE-9F heavy-duty gas turbines, the neck clamp of foreign technologies is broken, the application of home-made equipment is promoted, and the phenomena of operation and maintenance cost and transformation cost 'high price overflow' caused by monopoly of the foreign equipment are eliminated.
Drawings
FIG. 1 is a block diagram of a static variable frequency starting system according to the present invention.
Fig. 2 is a communication wiring diagram of a frequency conversion starting system of a GE-9F unit and an LS2100 system matched with the frequency conversion starting system.
Fig. 3 is a flowchart of a static variable frequency start control method according to the present invention.
Detailed Description
The application is further described below with reference to the accompanying drawings:
the static variable frequency starting system comprises at least one starting circuit connected with the gas turbine set, and each starting circuit comprises an input switch, a transformer, a static frequency converter and an output switch which are sequentially connected; each gas turbine unit is respectively matched with a grounding switch, an isolating switch and an excitation device; the input switch is connected with an alternating current source, the output switch is connected with the gas turbine unit, the grounding switch grounds the input end of the gas turbine unit, and the isolating switch is connected with the output switch and the input end of the gas turbine unit; when more than two starting circuits exist, the output switches of the starting circuits are bridged by the connecting switch, and the input switch, the output switch, the grounding switch, the connecting switch and the isolating switch are controlled to be switched on and off respectively. The system can realize the frequency conversion starting operation of a single set of unit or the simultaneous frequency conversion starting operation of two sets of units, has the characteristics of simple topological structure, flexible configuration, perfect locking, high reliability, strong expandability and the like, can meet the requirements of redundant operation and independent maintenance, is suitable for the field of static frequency conversion starting of the gas turbine unit, can completely replace a static frequency conversion starting device for operating a GE-9F unit, and comprises the strategy and measures for solving the problem of preventing a third-party equipment system from accessing a gas turbine control system MARKVI matched with a GE company.
Specifically, referring to fig. 1, the start-up line includes at least a first start-up line and a second start-up line;
the first starting circuit is provided with a first input switch 2, a first transformer 3, a first static frequency converter 4 and a first output switch 5 which are connected in sequence; the first input switch 2 is connected with a first alternating current source 1, a first starting circuit is connected with a first gas turbine set 9, the first gas turbine set 9 is matched with a first excitation device 10, a first isolating switch 6 and a first grounding switch 8, the first isolating switch 6 is connected between a first output switch 5 and the input end of the first gas turbine set 9, and the first grounding switch 8 grounds the input end of the first gas turbine set 9;
the second starting circuit is provided with a second input switch 12, a second transformer 13, a second static frequency converter 14 and a second output switch 15 which are connected in sequence; the second input switch 12 is connected to a second ac source 11, the second starting circuit is connected to a second engine unit 18, the second engine unit 18 is matched with a second excitation device 19, a second isolating switch 16 and a second grounding switch 17, the second isolating switch 16 is connected between the second output switch 15 and the input end of the second engine unit 18, and the second grounding switch 17 grounds the input end of the second engine unit 18;
a first connecting switch 7 is connected between the first output switch 5 and the second output switch 15.
The static variable frequency starting control method based on the static variable frequency starting system comprises a single unit starting step and a cross unit starting step;
the single unit starting step executes the following operations:
s11, starting the circuit to execute self-checking, and executing the step S12 after the self-checking is passed;
s12, opening the grounding switch, closing the output switch and the input switch, and then performing step S13;
s13, starting an excitation device corresponding to the combustion engine set, and then executing the step S14;
s14, starting the static frequency converter;
the cross-unit starting step executes the following operations:
s21, the selected starting circuit executes self-test, and after the self-test is passed, the step S22 is executed:
s22, closing the connecting switch to communicate the selected starting circuit with the target engine set, and then executing the step S23;
s23, disconnecting the grounding switch connected with the target combustion engine set, closing the isolating switch, closing the output switch and the input switch of the selected starting circuit, and then executing the step S24;
s24, starting an excitation device corresponding to the target engine set, and then executing the step S25;
and S25, starting the static frequency converter of the selected starting circuit.
The input switch, the output switch and the isolating switch are disconnected in a normal state, and the grounding switch is closed in the normal state; when the starting circuit executes self-checking, the following requirements are met: a) whether an input switch, an output switch and an isolating switch in the current line are in an off state or not; b) whether the grounding switch is in a closed state; c) whether the exciting device and the static frequency converter are in a serviceable state or not; if the conditions are met, judging that the loop has no fault, and starting the starting circuit; otherwise, other starting lines are switched.
In a first application mode, with reference to fig. 1, a first starting circuit and a second starting circuit respectively perform stationary variable frequency starting of a first combustion engine unit and a second combustion engine unit, and perform the following operations:
first, the first connecting switch 7 is turned off;
then, if the self-test of the first starting circuit has no fault, sequentially executing the following steps on the first starting circuit: disconnecting the first grounding switch 8, closing the first isolating switch 6, closing the first output switch 5, closing the first input switch 2, starting the first excitation device 10 and starting the first static frequency converter 4;
if the second starting circuit has no fault in self-detection, sequentially executing the following steps on the second starting circuit: the second earthing switch 17 is opened, the second isolating switch 16 is closed, the second output switch 15 is closed, the second input switch 12 is closed, the second excitation device 19 is started, and the second stationary frequency converter 14 is started.
In a second application mode, with reference to fig. 1, the first starting circuit performs static variable frequency starting of the first combustion engine set, and executes the following operations:
if the first starting circuit has no fault in self-detection, sequentially executing: disconnecting the first connecting switch 7, disconnecting the first grounding switch 8, closing the first isolating switch 6, closing the first output switch 5, closing the first input switch 2, starting the first exciting device 10 and starting the first static frequency converter 4;
if the first starting circuit has a fault, when the second starting circuit is switched to carry out static variable frequency starting on the first gas turbine unit, sequentially executing the following steps: closing the first connecting switch 7, opening the first grounding switch 8, closing the first isolating switch 6, closing the second output switch 15, closing the second input switch 12, starting the first excitation device 10 and starting the second static frequency converter 14.
Similarly, the static variable-frequency starting of the second combustion engine unit is carried out on the second starting circuit, similar operations to the above are also carried out, the operation can be extended to the cross-unit starting operation of multiple units, and the fault-free starting circuit is selected and communicated with the circuit of the corresponding combustion engine unit through the connecting switch, so that the description is not repeated.
Further, in order to realize the access and control of the static variable frequency starting system, a plurality of information points of the static variable frequency starting system are defined in the combustion engine control system; the information points comprise feedback input switches, output switches, isolating switches, opening/closing state information points of connecting switches, operation state information points of feedback transformers, static frequency converters and exciting devices, analog quantity information points of feedback currents, voltages and frequencies and instruction information points output to a static frequency conversion starting system.
The EGD communication signals of an original variable frequency starting device and a gas turbine control system are respectively processed according to signal types, referring to the attached figure 2, a curve 1 is that signal state feedback is used in EDG communication points, the EDG communication points comprise signal points of switch disconnecting and switching on states, fault alarm and the like, point information definition is added to the gas turbine control system, and signal points output by hard wiring of the variable frequency starting system are associated with software information points of the gas turbine control system through processing; and the curve 2 is that the EGD communication point is used for receiving analog quantity signals sent by the variable frequency starting system, and the analog quantity signals comprise information signal points such as current, voltage, frequency and the like, and are related to the original software information points of the combustion engine control system through conversion processing in the combustion engine control system. The curve 3 is that the digital quantity of the EGD communication is converted into a switching value output point, and in addition, the instructions for outputting in the EGD communication point, including opening and closing instruction signal points, are added with point information definition in the gas turbine control system, and are processed to output and correlate the signal points which are used by the gas turbine control system for outputting instructions to the variable frequency starting device; therefore, the third-party equipment is connected to the interface of the original combustion engine control system.
With reference to fig. 1 and 2, the first stationary frequency converter 4 and the second stationary frequency converter 14 are connected and controlled by a combustion engine control system; the first stationary frequency converter 4 may be configured to monitor a knife switch feedback state of the first grounding switch 8, a knife switch feedback state of the first isolating switch 6, a knife switch feedback state of the first connecting switch 7, a breaker feedback state of the first input switch 2, and a knife switch feedback state of the first output switch 5, and then the first stationary frequency converter 4 restricts a switching-on and switching-off operation of the first input switch 2, a switching-on and switching-off operation of the knife switch of the first output switch 5, and a switching-on and switching-off operation of the knife switch of the first connecting switch 7 according to the known feedback states of the first grounding switch 8, the first isolating switch 6, the first connecting switch 7, the first input switch 2, and the first output switch 5. Similarly, the second stationary frequency converter 14 may be configured to monitor the knife-switch feedback state of the second grounding switch 17, the knife-switch feedback state of the second isolating switch 16, the breaker feedback state of the second input switch 12, and the knife-switch feedback state of the second output switch 15, and then the second stationary frequency converter 14 may restrict the closing and opening operations of the second input switch 12 and the knife-switch of the second output switch 15 according to the known feedback states of the second grounding switch 17, the second isolating switch 16, the second input switch 12, and the second output switch 15.
Furthermore, in the starting operation of the starting circuit on the gas turbine unit, the rotor of the gas turbine unit firstly enters a turning state, and then the static frequency converter is started;
when the rotating speed of the gas turbine unit is increased to a first rotating speed, the gas turbine control system sends a blowing and cleaning rotating speed instruction to enable the gas turbine unit to perform blowing and cleaning, and after blowing and cleaning are completed, the gas turbine control system controls the rotating speed of the gas turbine unit to be reduced to a second rotating speed and performs ignition; if the ignition is successful, maintaining the second rotating speed and warming up; if the ignition fails, repeating the blowing and ignition operations until the ignition is successful; after warming up is completed, the gas turbine control system sends a speed increasing instruction to the gas turbine unit, the static frequency converter is stopped when the rotating speed of the gas turbine unit reaches a third rotating speed, and then the gas turbine unit independently increases the speed to a grid-connected rotating speed (3000 revolutions per minute). The first rotating speed is 600-700 rpm, preferably 699 rpm; the second rotation speed is 400-500 rpm, preferably 420 rpm; the third rotation speed is 2500-; the blowing time is 10-15 minutes, preferably 11 minutes; the warm-up time is 3 to 8 minutes, preferably 5 minutes.
Referring to fig. 3, taking the actual command flow of the combustion engine control system as an example: MARKVIe is a combustion engine control system, LCI represents a static frequency converter, G1 represents a first combustion engine set, G2 represents a second combustion engine set started in a cross mode, E1 represents a first exciting device of the first combustion engine set, 89TS represents a first connecting switch for starting the two combustion engine sets in the cross mode, 52SS represents a first input switch of the static frequency converter, 89MD _1 represents a first output switch of the static frequency converter, 89ND represents a first grounding switch, and 89SS _1 is a generator end disconnecting link of the first combustion engine set.
The static variable frequency starting control process comprises the following steps:
1) before starting, firstly confirming that the first static frequency converter #1LCI1 or the second static frequency converter #2LCI is in a ready state;
2) selecting whether a first gas turbine unit G1 is started by using a first static frequency converter #1LCI or a second static frequency converter #2LCI on a picture of a gas turbine control system MARKVIe, if the second static frequency converter #2LCI is selected, the mode is a cross-start mode, and a control process of a first connecting switch 89TS is realized;
3) the LCI receives a G1 selection order and sends back 'serviceable G1' to a gas turbine control system MARKVIe;
4) the gas turbine control system MARKVIe sends a command to set the first excitation device E1 to be in an LCI starting mode, and the first excitation device E1 starts to operate;
5) after the first excitation device E1 operates, a sequential control request is sent to the LCI of the static frequency converter by a MARKVIe control system, and then a power-on request is sent to the LCI of the static frequency converter;
6) after receiving a power-on request, the LCI of the static frequency converter sends out 'LCI served G1';
7) after the gas turbine control system MARKVIe receives the service, the LCI service G1 is confirmed;
8) the static frequency converter LCI sends a command to the first input switch 52SS and the first output switch 89MD _1, and if the second static frequency converter #2LCI is selected to start the G1 unit, the first connecting switch 89TS is needed to be connected;
9) after the static frequency converter LCI finishes the control, the system is connected;
10) after receiving the connection completion of the LCI of the static frequency converter, the MARKVIe sends out a switch-on command of a generator-end disconnecting link 89SS of the first gas turbine unit G1, and sends out a switch-off command of a first grounding switch 89ND after confirming that the switch-on command is in place;
11) after receiving 89ND (neutral density) dividing feedback of a first grounding switch, a gas turbine control system MARKVIe sends an LCI (inductor control interface) running command and an LCI torque command, then a static frequency converter LCI starts running when a unit rotor is in a turning state, sends an excitation given quantity analog signal to an excitation device, and then sends a blowing and cleaning speed command according to the requirement of a 9F gas turbine running mode;
12) the method comprises the following steps that (1) a first gas turbine unit G1 is accelerated to 699 revolutions per minute, after 11 minutes of blowing is finished, an LCI torque command is recovered, the speed of the unit is reduced to 420 revolutions per minute for ignition, the ignition is successful, an ignition command is recovered, the rotating speed is maintained, and the engine is warmed up for 5 minutes; if the ignition fails, sending out the blowing and cleaning rotating speed again to carry out a clear ignition process;
13) after the unit is ignited successfully and warmed up for 5 minutes, MARKVI e sends out a full speed command, and the LCI and the combustion engine combine to accelerate the unit;
14) the speed of the unit is increased to a self-sustaining speed of 2565 rpm, and a gas turbine control system MARKVIe recovers LCI running orders, full speed orders and torque orders;
15) the LCI of the static frequency converter receives and recovers the 'LCI running order', and at the moment, a combustion engine control system MARKVI E sends an order to the first excitation device E1 to be in an automatic mode;
16) then the LCI of the static frequency converter sends a first input switch 52SS brake-off command and a first input switch 89MD _1 brake-off command in sequence, if the #2LCI is selected to start G1, a second input switch 89TS brake-off command is sent;
17) after the control flow is finished, LCI recovery is 'system connected';
18) the gas turbine control system MARKVIe sends a switch-off command of a generator-end knife switch 89SS of the first gas turbine unit G1, after confirming that the switch-off command of the generator-end knife switch 89SS of the first gas turbine unit G1 is switched off, a switch-on command of a first grounding switch 89ND is sent, the LCI starting control process is finished, and then the gas turbine unit is accelerated to the grid-connected rotating speed (3000 revolutions per minute) independently.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (10)
1. A static variable frequency starting system is characterized by comprising at least one starting circuit connected with a gas turbine unit, wherein each starting circuit comprises an input switch, a transformer, a static frequency converter and an output switch which are sequentially connected; each gas turbine unit is respectively matched with a grounding switch and an excitation device; the input switch is connected with an alternating current source, the output switch is connected with the gas turbine unit, and the grounding switch grounds the input end of the gas turbine unit; when more than two starting circuits exist, the output switches of the starting circuits are bridged by the connecting switch, and the input switch, the output switch, the grounding switch and the connecting switch are controlled to be switched on and off respectively.
2. The static variable frequency starting system according to claim 1, wherein a controlled on-off isolating switch is arranged between the starting circuit and the input end of the combustion engine set.
3. The stationary variable frequency start-up system of claim 2, wherein the start-up line comprises at least a first start-up line and a second start-up line;
the first starting circuit is provided with a first input switch, a first transformer, a first static frequency converter and a first output switch which are connected in sequence; the first starting circuit is connected with a first gas turbine set, the first gas turbine set is matched with a first excitation device, a first isolating switch and a first grounding switch, the first isolating switch is connected between a first output switch and the input end of the first gas turbine set, and the first grounding switch grounds the input end of the first gas turbine set;
the second starting circuit is provided with a second input switch, a second transformer, a second static frequency converter and a second output switch which are connected in sequence; the second starting circuit is connected with a second engine unit, the second engine unit is matched with a second excitation device, a second isolating switch and a second grounding switch, the second isolating switch is connected between the second output switch and the input end of the second engine unit, and the second grounding switch grounds the input end of the second engine unit;
a first connecting switch is connected between the first output switch and the second output switch.
4. A static variable frequency starting control method is characterized in that the static variable frequency starting system based on any one of claims 1 to 3 comprises a single unit starting step and a cross unit starting step;
the single unit starting step executes the following operations:
s11, starting the circuit to execute self-checking, and executing the step S12 after the self-checking is passed;
s12, opening the grounding switch, closing the output switch and the input switch, and then performing step S13;
s13, starting an excitation device corresponding to the combustion engine set, and then executing the step S14;
s14, starting the static frequency converter;
the cross-unit starting step executes the following operations:
s21, the selected starting circuit executes self-test, and after the self-test is passed, the step S22 is executed:
s22, closing the connecting switch to communicate the selected starting circuit with the target engine set, and then executing the step S23;
s23, disconnecting the grounding switch connected with the target engine set, closing the output switch and the input switch of the selected starting circuit, and then executing the step S24;
s24, starting an excitation device corresponding to the target engine set, and then executing the step S25;
and S25, starting the static frequency converter of the selected starting circuit.
5. The method according to claim 4, wherein the disconnecting switch connected to the grounding switch is synchronously closed when the grounding switch is disconnected.
6. The static variable frequency start-up control method according to claim 5, characterized in that the input switch, the output switch and the isolating switch are normally open, and the grounding switch is normally closed;
when the starting circuit executes self-checking, the following requirements are met: a) whether an input switch, an output switch and an isolating switch in the current line are in an off state or not; b) whether the grounding switch is in a closed state; c) whether the exciting device and the static frequency converter are in a serviceable state or not;
if the conditions are met, judging that the loop has no fault, and starting the starting circuit; otherwise, other starting lines are switched.
7. The static variable frequency start-up control method according to claim 5, wherein the start-up line comprises at least a first start-up line and a second start-up line;
the first starting circuit is provided with a first input switch, a first transformer, a first static frequency converter and a first output switch which are connected in sequence; the first starting circuit is connected with a first gas turbine set, the first gas turbine set is matched with a first excitation device, a first isolating switch and a first grounding switch, the first isolating switch is connected between a first output switch and the input end of the first gas turbine set, and the first grounding switch grounds the input end of the first gas turbine set;
the second starting circuit is provided with a second input switch, a second transformer, a second static frequency converter and a second output switch which are connected in sequence; the second starting circuit is connected with a second engine unit, the second engine unit is matched with a second excitation device, a second isolating switch and a second grounding switch, the second isolating switch is connected between the second output switch and the input end of the second engine unit, and the second grounding switch grounds the input end of the second engine unit;
a first connecting switch is connected between the first output switch and the second output switch;
when the first starting circuit is used for static variable-frequency starting of the first combustion engine set,
if the self-checking is failure-free, sequentially executing: disconnecting the first connecting switch, disconnecting the first grounding switch, closing the first isolating switch, closing the first output switch, closing the first input switch, starting the first excitation device and starting the first static frequency converter;
if the self-checking is faulty, when the second starting circuit is switched to carry out the static variable frequency starting of the first gas turbine unit, the following steps are sequentially carried out: and closing the first connecting switch, disconnecting the first grounding switch, closing the first isolating switch, closing the second output switch, closing the second input switch, starting the first excitation device and starting the second static frequency converter.
8. The static variable frequency starting control method according to claim 4, characterized in that a plurality of information points of the static variable frequency starting system are defined in the combustion engine control system to realize the access and control of the static variable frequency starting system;
the information points comprise feedback input switches, output switches, isolating switches, opening/closing state information points of connecting switches, operation state information points of feedback transformers, static frequency converters and exciting devices, analog quantity information points of feedback currents, voltages and frequencies and instruction information points output to a static frequency conversion starting system.
9. The static variable frequency start-up control method according to claim 8, wherein, in a start-up operation of the start-up line to the engine unit,
a rotor of the gas turbine unit enters a turning state firstly, and then a static frequency converter is started;
when the rotating speed of the gas turbine unit is increased to a first rotating speed, the gas turbine control system sends a blowing and cleaning rotating speed instruction to enable the gas turbine unit to perform blowing and cleaning, and after blowing and cleaning are completed, the gas turbine control system controls the rotating speed of the gas turbine unit to be reduced to a second rotating speed and performs ignition; if the ignition is successful, maintaining the second rotating speed and warming up; if the ignition fails, repeating the blowing and ignition operations until the ignition is successful;
after warming up is completed, the gas turbine control system sends a speed increasing instruction to the gas turbine unit, the static frequency converter is stopped when the rotating speed of the gas turbine unit reaches a third rotating speed, and then the gas turbine unit independently increases the speed to a grid-connected rotating speed.
10. The method as claimed in claim 9, wherein the first rotation speed is 600-700 rpm, the second rotation speed is 400-500 rpm, the third rotation speed is 2500-2800 rpm, the purge duration is 10-15 min, and the warm-up duration is 3-8 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111264613.2A CN114151202A (en) | 2021-10-28 | 2021-10-28 | Static variable frequency starting system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111264613.2A CN114151202A (en) | 2021-10-28 | 2021-10-28 | Static variable frequency starting system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151202A true CN114151202A (en) | 2022-03-08 |
Family
ID=80459491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111264613.2A Pending CN114151202A (en) | 2021-10-28 | 2021-10-28 | Static variable frequency starting system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151202A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06288259A (en) * | 1993-04-02 | 1994-10-11 | Toshiba Corp | Gas turbine starting device |
| CN202832797U (en) * | 2012-08-24 | 2013-03-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Start-up system of gas turbine based on frequency changer |
| CN107666256A (en) * | 2016-07-29 | 2018-02-06 | 中国电力科学研究院 | A kind of control method of gas turbine purging |
| CN208089414U (en) * | 2018-02-22 | 2018-11-13 | 大唐国际发电股份有限公司北京高井热电厂 | A kind of gas turbine group static state starter feedback signal circuit |
| CN111273172A (en) * | 2020-03-23 | 2020-06-12 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Dynamic die test device and method for static variable frequency starting system of gas turbine generator |
| CN112653189A (en) * | 2021-01-20 | 2021-04-13 | 中国电建集团福建省电力勘测设计院有限公司 | Combustion engine black start method based on small combustion engine as black start power supply |
-
2021
- 2021-10-28 CN CN202111264613.2A patent/CN114151202A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06288259A (en) * | 1993-04-02 | 1994-10-11 | Toshiba Corp | Gas turbine starting device |
| CN202832797U (en) * | 2012-08-24 | 2013-03-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Start-up system of gas turbine based on frequency changer |
| CN107666256A (en) * | 2016-07-29 | 2018-02-06 | 中国电力科学研究院 | A kind of control method of gas turbine purging |
| CN208089414U (en) * | 2018-02-22 | 2018-11-13 | 大唐国际发电股份有限公司北京高井热电厂 | A kind of gas turbine group static state starter feedback signal circuit |
| CN111273172A (en) * | 2020-03-23 | 2020-06-12 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Dynamic die test device and method for static variable frequency starting system of gas turbine generator |
| CN112653189A (en) * | 2021-01-20 | 2021-04-13 | 中国电建集团福建省电力勘测设计院有限公司 | Combustion engine black start method based on small combustion engine as black start power supply |
Non-Patent Citations (2)
| Title |
|---|
| 于丹: "大功率负载换相式变频器在燃气发电机中的研究与应用", 中国优秀硕士学位论文全文数据库 工程科技 II 辑, no. 03, pages 042 - 1364 * |
| 陈志勇: "燃机电厂 SFC 启动特点探讨", 上海大中型电机, no. 3, pages 23 - 36 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5386147A (en) | Aerospace power control system for monitoring and reliably transferring power buses | |
| JP2004507199A (en) | Wind power equipment | |
| US20100320842A1 (en) | Startup source inverter | |
| CN110752595B (en) | Power distribution station fault support method and device based on flexible decision strategy | |
| EP2110943A2 (en) | Systems And Methods Involving Variable Speed Generators | |
| EP0771059B1 (en) | Method and apparatus for transferring between electrical power sources with adaptive blocks transfer until load voltage decays to safe value | |
| CN114151202A (en) | Static variable frequency starting system and control method thereof | |
| US6727603B1 (en) | Automatic mode transitions for microturbine generating systems | |
| US7560834B2 (en) | Generator switch | |
| CN110970876A (en) | Feeder automation fault isolation method and device | |
| CN108347056B (en) | AC/DC hybrid micro-grid control method | |
| KR102105812B1 (en) | Apparatus for replacing transformer with uninterruptiable power supply and method | |
| CN109088444B (en) | Optimization method for non-full-phase protection action performance of direct-current receiving-end phase modulator | |
| CN113991835A (en) | Control method for seamless switching of double power supplies based on spare power automatic switching device | |
| CN113839548A (en) | Method and controller for controlling starting and stopping of converter valve group | |
| CN111371078A (en) | On-site feeder automation method based on full circuit breaker | |
| CN110165704A (en) | A kind of black-start method of power grid | |
| CN221042682U (en) | Soft start system of large blast furnace blower | |
| CN110391659B (en) | Power system stability control method and system based on branch potential energy method | |
| CN112217411B (en) | Reactive power converter and soft start and overhaul method thereof | |
| CN117559629A (en) | Power supply rapid switching starting control system and method based on multi-power supply cooperative control | |
| JPH10213696A (en) | Station power facility of reactor power plant | |
| KR20230128789A (en) | Grid uninterruptible power supply apparatus and method when replacing transforemer | |
| CN117335688A (en) | Motor variable-frequency soft start circuit and circuit control method | |
| JP3419929B2 (en) | Operating device of variable speed pumped storage power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |