CN111120020A - Transformation method, device, equipment and storage medium of ultra-supercritical unit - Google Patents
Transformation method, device, equipment and storage medium of ultra-supercritical unit Download PDFInfo
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- CN111120020A CN111120020A CN201911368562.0A CN201911368562A CN111120020A CN 111120020 A CN111120020 A CN 111120020A CN 201911368562 A CN201911368562 A CN 201911368562A CN 111120020 A CN111120020 A CN 111120020A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
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Abstract
The application discloses a method, a device, equipment and a storage medium for transforming an ultra-supercritical unit, wherein the method comprises the following steps: respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit; if unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network, the unqualified indexes are modified until the unqualified indexes are qualified; and carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes. The transformation method of the ultra-supercritical unit solves the technical problems that in the prior art, the time required by restarting is long, the starting operation is very complicated, and the requirement of a power grid for quickly recovering a power supply is difficult to meet.
Description
Technical Field
The application relates to the technical field of black start of power systems, in particular to a transformation method, a device, equipment and a storage medium of an ultra-supercritical unit.
Background
A service that can provide starting power to other power plants after a blackout is generally referred to as a black start service. The power supply capable of providing the black start service is generally called a power supply with self-starting capability such as a pumped storage power station or a diesel generator, but is limited by factors such as geographical environment, capacity and economy, and the unit resource of the type is scarce.
The conventional ultra-supercritical thermal power generating unit is disconnected from a power grid when a large disturbance or a large power failure accident occurs to the power grid, which often means tripping and shutdown, the power grid is required to receive a starting power supply to start, and the power grid is a receptor of black start service.
Disclosure of Invention
The application provides an ultra-supercritical unit transformation method, an ultra-supercritical unit transformation device, equipment and a storage medium, solves the problem that a conventional ultra-supercritical thermal power unit is disconnected with a power grid when a power grid is subjected to large disturbance or large power failure accident, and is prone to tripping and stopping in the prior art, and meanwhile, the unit can be kept running without stopping with service power, can recharge the power grid when needed, and can provide a power source required by starting for other units.
The application provides a first aspect of an ultra-supercritical unit transformation method, which comprises the following steps:
respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit;
if unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network, the unqualified indexes are modified until the unqualified indexes are qualified;
and carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes.
Optionally, the obtaining of the function index parameters of the ultra supercritical unit coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the integrated control system, and the machine network respectively further includes:
and if the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, directly performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
Optionally, the performing a black start capability test on the ultra-supercritical unit with all functional indexes qualified includes:
checking equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
Optionally, the modifying the failure indicator until the failure indicator is qualified includes:
the method comprises at least one modification project of modifying a high-voltage bypass and a low-voltage bypass, modifying safety door configuration of a reheater, modifying a deaerator pressure control loop, modifying a feed pump, modifying a deaerator water tank, modifying DEH action logic, modifying overspeed protection controller action logic, modifying FCB control logic of a boiler load target value, modifying FCB control logic of a boiler load reduction rate, modifying FCB control logic of a coal mill, modifying electric linkage protection logic of a boiler, modifying an excitation regulator, modifying a main transformer high-voltage side circuit breaker and modifying a main transformer high-voltage side switch of a unit.
The application second aspect provides an ultra supercritical unit reforms transform device, includes:
the system comprises an acquisition function index parameter module, a control module and a management module, wherein the acquisition function index parameter module is used for respectively acquiring function index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of an ultra-supercritical unit;
the improvement module is used for improving the unqualified indexes until the unqualified indexes are qualified if the unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network;
and the test module is used for carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes.
Optionally, the function index parameter obtaining module is further configured to:
and if the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, directly performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
Optionally, the test module is specifically configured to: checking equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
A third aspect of the present application provides an ultra-supercritical unit reconstruction apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the ultra-supercritical unit reconstruction method according to the instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the ultra-supercritical unit reconstruction method according to the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a transformation method of an ultra-supercritical unit, which comprises the following steps:
respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit;
if unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network, the unqualified indexes are modified until the unqualified indexes are qualified;
and carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes.
The application provides a super supercritical unit transformation method, through the bypass system to super supercritical unit, the water supply system, steam turbine control system, boiler control system, the combustion management system, the function index parameter of integrated control system and net coordination is reformed transform so that each item function index of these systems is all qualified, possess after the black start ability, carry out black start ability test to super supercritical unit, when the test passes, show promptly that this unit has possessed black start ability, mean when big disturbance or trouble appear in the electric wire netting, the unit can carry out quick load shedding, and get into the running state who takes the service power island. Therefore, the method can be quickly connected to the power grid in the power grid recovery stage, a starting power supply is provided for the shutdown unit in the power grid, the recovery process of the power grid is accelerated, and the power failure time is reduced. The transformation method of the ultra-supercritical unit solves the technical problems that in the prior art, the time required by restarting is long, the starting operation is very complicated, and the requirement of a power grid for quickly recovering a power supply is difficult to meet.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for modifying an ultra-supercritical unit provided herein;
FIG. 2 is a schematic flow chart diagram illustrating another embodiment of a method for modifying an ultra-supercritical unit provided herein;
fig. 3 is a schematic structural diagram of an ultra supercritical unit modification apparatus provided by the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides an ultra-supercritical unit transformation method, an ultra-supercritical unit transformation device, equipment and a storage medium, solves the problem that a conventional ultra-supercritical thermal power unit is disconnected with a power grid when a power grid is subjected to large disturbance or large power failure accident, and is prone to tripping and stopping, and meanwhile, the unit can be kept running without stopping with service power, can recharge the power grid when needed, and provides a power source required by starting for other units.
For easy understanding, referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for modifying an ultra-supercritical unit provided by the present application;
the first aspect of the embodiment of the application provides a method for transforming an ultra-supercritical unit, which comprises the following steps:
100, respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit;
200, if unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network, modifying the unqualified indexes until the unqualified indexes are qualified;
300, performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
It should be noted that, in the method for modifying an ultra-supercritical unit provided in the embodiment of the present application, it is first checked whether the function indexes of the unit in coordination with the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the integrated control system, and the network meet the requirements, the checked function indexes are 7 categories in total, 14 indexes, and the checked indexes are shown in the function check reference table in coordination with the unit bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the integrated control system, and the network in table 1:
TABLE 1 functional check and reference table for coordination of unit bypass system, water supply system, steam engine control system, boiler control system, combustion management system, integrated control system and machine network
And (4) transforming the 14 indexes of 7 major classes in the table until the 14 indexes are qualified as long as unqualified functional indexes exist, and performing black start capability test verification after all the functional indexes are qualified.
For convenience of connection, please refer to fig. 2, which is a schematic flow chart of another embodiment of the ultra supercritical unit transformation method provided by the present application;
further, the method comprises the following steps of respectively obtaining the coordinated function index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and a machine network of the ultra-supercritical unit, and then further comprising the following steps:
400, if the functional indexes of the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, directly performing a black start capability test on the ultra-supercritical unit with all the qualified functional indexes.
It should be noted that, if all of the 14 functional indexes in the 7 categories mentioned in the above embodiments are qualified and reach the given index value, the black start test verification is directly performed.
Further, the black start capability test is carried out on all the qualified ultra-supercritical units with the functional indexes, and the black start capability test comprises the following steps:
inspecting equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
The black start capability test of the ultra-supercritical unit comprises three parts, namely preparation before test, test development and evaluation after test: preparation before the test included:
firstly, the method comprises the following steps: checking whether major equipment has major defects, whether an operating mechanism is flexible and whether a major monitoring instrument is accurate; adjusting the static characteristics of the system to meet the requirements; checking whether the action of the security system is reliable, whether the lifting rotating speed test of the emergency protector is qualified, and whether the action of the manual stopping device is normal; checking whether the tightness test of the main steam valve and the regulating steam valve is qualified, whether the valve rod is jammed or not and whether the closing time of the pumping machine meets the requirement or not; checking whether the interlocking action of the steam extraction check valve is normal or not and whether the closing is tight or not; checking whether the interlocking action of the high-pressure starting oil pump and the direct-current lubricating oil pump is normal or not and whether the oil quality of the oil system is qualified or not; checking whether the protection test of the high-pressure heater is qualified; checking whether a standby steam source of a unit using extracted steam as a deaerator or a water feeding pump steam source can be automatically put into use or not; checking whether the bypass system of the steam turbine is in a hot standby state (whether the bypass system is put into use is determined according to specific conditions of the turbine or the furnace); checking whether safety valves of a boiler superheater and a reheater are debugged and checked to be qualified or not; checking whether the thermotechnical and electrical protection wiring is normal or not and whether the action is reliable or not, and meeting the requirements of test conditions, such as: the generator tripping is linked with the closing of the main steam valve; checking whether the plant power supply is reliable; checking whether the tripping of a main switch and a field-suppression switch of the generator is good or not; checking whether the test instrument and the instrument are qualified in verification and whether the system is accessed.
II, secondly: mounting and inspecting the test measuring device: the following parameters are measured by a Digital Control System (DCS) or an external measurement system of the unit: the boiler parameters comprise main steam pressure, steam temperature, feed water flow, total air quantity, total fuel quantity, hearth pressure and heating surface wall temperature of each level of the boiler. The parameter changes of the steam turbine include: the system comprises a steam turbine, a main steam pressure, a steam turbine main steam opening, a steam turbine regulating valve opening, a high side steam pressure, a high side desuperheater rear temperature, a low side pressure, a low side steam temperature, a high and low water adding level, an auxiliary steam pressure, a water feeding pump rotating speed and a water feeding pump high/low pressure regulating valve opening. The relevant parameters of the generator comprise active power of the generator, reactive power of the generator, voltage of the generator, current of the generator, excitation voltage and excitation current.
And finally submitting a test application and compiling a test operation order.
The development test comprises the adjustment of an initial mode, the FCB test of a unit, the black start test of a power grid and the recovery of a test subsystem. The operation of initial mode adjustment comprises test line and bus vacation operation; and the started unit stops operating. The operation of the FCB test comprises the load shedding operation of the test unit and the operation of the test unit entering an island controllable state. The operation of the power grid black start test comprises the steps that the FCB unit transmits power to a target power transmission channel, the FCB unit carries service power of a target power plant, the FCB unit carries unit rush of the target power plant, the unit of the target power plant is parallel to the FCB unit, the FCB unit carries load, and the black start is maintained to stably run in a small system. And the test subsystem restores a small system consisting of the unit of the target power plant and the FCB unit to be parallel to the main network and restores the normal operation mode of the power grid.
The evaluation after the test was:
checking whether the boiler does not extinguish a fire or not during a load shedding test of the unit, the temperature behind the high-low pressure bypass valve is not over-limited, and the rotating speed of the steam turbine does not fly to reach the limit value of the over-frequency protection action of the generator;
checking whether the test unit can maintain long-time stable operation for more than 2 hours after entering an island controllable state;
checking measurement data of an FCB set during power transmission to a target power transmission channel, and judging whether transient overvoltage, generator self-excitation, no-load circuit closing overvoltage, transformer excitation inrush current, resonance overvoltage, power flow out-of-limit and power oscillation do not occur during power transmission according to the measurement data;
whether a large-scale auxiliary machine is normally started or not is checked during the service power period of the FCB set with the target power plant, and phenomena such as motor stalling and starting failure do not occur;
checking whether the unit of the target power plant can be normally started within 3 hours;
and checking whether the unit of the target power plant can be parallel to the FCB unit or not, and maintaining the stable operation of the black-start small system.
In the six evaluations, if the ultra-supercritical unit passes the evaluation, the unit is proved to pass the modification and to have the black start service capability. The method means that when a large disturbance or fault occurs to a power grid, the unit can quickly dump load and enter an island operation state with service power. Therefore, the ultra-supercritical unit with the black start capability can be quickly connected to the power grid in the recovery stage of the power grid, a start power supply is provided for the shutdown unit in the power grid, the recovery process of the power grid is accelerated, and the power failure time is shortened.
Further, the step of reconstructing the unqualified index until the unqualified index is qualified comprises the following steps:
the method comprises at least one modification project of modifying a high-voltage bypass and a low-voltage bypass, modifying safety door configuration of a reheater, modifying a deaerator pressure control loop, modifying a feed pump, modifying a deaerator water tank, modifying DEH action logic, modifying overspeed protection controller action logic, modifying FCB control logic of a boiler load target value, modifying FCB control logic of a boiler load reduction rate, modifying FCB control logic of a coal mill, modifying electric linkage protection logic of a boiler, modifying an excitation regulator, modifying a main transformer high-voltage side circuit breaker and modifying a main transformer high-voltage side switch of a unit.
It should be noted that, the project of modification of the ultra-supercritical unit may include 14 projects:
1. retrofitting high and low pressure bypasses
The high pressure bypass needs to be modified to a 100% BMCR configuration with a safety gate function. The low pressure bypass requires a configuration retrofit to a 65% BMCR: the high-pressure bypass system adopting 100% BMCR can be used for starting under various working conditions, and can also meet the running mode that a unit is greatly subjected to load shedding and shutdown is not stopped, and the high-pressure bypass has a rapid pressure relief function of 100% BMCR capacity, so that a safety valve can be replaced. The low-pressure bypass with 65% of capacity is beneficial to the working medium balance of a thermodynamic system and the stability of the water level of a condenser. The specific transformation process is that 4 sets of units can be assumed for each unit of the high-pressure bypass of the unit, and the units are uniformly distributed at the outlet of a main steam header in a boiler room and are connected to a reheating cooling section steam pipeline after temperature and pressure reduction. The desuperheated water of the high pressure bypass is taken from the high pressure heater outlet. The capacity of the high pressure bypass is 100% BMCR. Each unit in the low pressure bypass of the low pressure bypass system can be assumed to be 2 sets, and two branch pipes of hot reheat steam in front of an inlet of a turbine intermediate pressure cylinder are respectively connected out and then connected to a condenser after temperature and pressure reduction. The capacity of the low pressure bypass is 65% BMCR. The high and low bypasses are connected in series to complete the work of the whole bypass system.
2. Reheater retrofit safety door arrangement
The capacity of the reheater safety gate needs to be modified to 100% BMCR capacity configuration: when 100% FCB occurs, the amount of steam entering the reheater piping is approximately 116% (100% main steam + 16% high side desuperheated water), and a small portion of the steam is vented to the atmosphere through a reheat safety gate. When a large amount of steam enters the condenser, the low vacuum fault of the steam turbine is easily caused, and the low-pressure bypass is locked. In this case, the steam from the high bypass can only be discharged through the reheat safety gate, and therefore, it is necessary to consider 100% of the reheat safety gate. The reheater safety door is a safety valve with adjustable take-off pressure, recoil pressure and opening, and can be adjusted and checked according to 100% BMCR capacity configuration.
3. Pressure control loop for improving deaerator
A pressure control loop of the deaerator is modified with an auxiliary machine fault load reduction (RunBack, RB) program function, so that the deaerator is prevented from causing pressure to drop suddenly greatly after a steam source of steam extraction is lost, and even cavitation of a water supply pump is caused. The transformation method can be that a pressure regulating door of the deaerator triggers a feedforward signal which is connected into the FCB, so that the deaerator can rapidly act in advance before the FCB signal is triggered. The deaerator temperature rise rate limiting logic is configured to latch at FCB at full load conditions. And the control signal of the auxiliary steam-to-deaerator shutoff door is set to be the FCB signal for triggering and then is quickly opened.
4. Improved water supply pump
When the water feeding pump is an electric water feeding pump, an electric pump interlocking start control logic is added, and the logic is that the electric water feeding pump automatically starts with load along with the FCB action. When the water supply pump is of a steam-driven water supply pump type, a steam source switching system of the steam turbine is modified, and the steam source switching system is automatically switched to a standby steam source along with the FCB action.
5. Improved deoxygenation water tank
Because the capacity of the deoxidizing water tank of the boiler evaporation capacity less than 6min is difficult to meet the water storage requirement of the ultra-supercritical boiler in FCB, the deoxidizing water tank needs to be modified and improved. The modification method can select a built-in integrated headless deaerator, and the capacity of the integrated headless deaerator is increased to 6min of boiler evaporation capacity.
6. Modifying DEH action logic
And transforming DEH action logic to convert DEH control after FCB triggering from a load control mode to a primary frequency modulation control mode. The improvement mode can be a logic rule that a DEH control mode is triggered by an FCB (frequency control bus), when a switch on the high-voltage side of a main transformer at the outlet of the unit is switched off, an FCB trigger signal is changed from '0' to '1', and a DEH control loop is switched to a primary frequency modulation control mode with an initial value.
7. Modifying Overspeed Protection Controller (OPC) action logic
And modifying over-speed protection controller (OPC) action logic, so that the FCB signal triggers the over-speed protection controller (OPC) action until the rotation speed is reduced to be within the allowable value range, and the OPC action is finished. The specific logic for adding the DPC overspeed protection circuit is that when the load of the unit is more than 100MW, a generator outlet switch (GCB) opening signal triggers the OPC action, and when the rotating speed is reduced to an allowable value 3708r/min, the OPC action is finished.
8. FCB control logic for modifying boiler load target value
And modifying the control logic of the target value of the boiler load, adding an FCB signal triggering link, and changing the target value of the boiler load to 35% BMCR when the FCB triggering signal is changed from '0' to '1'. When the FCB trigger signal changes from "1" to "0", the boiler load target value is reset.
9. FCB control logic for improving load shedding rate of boiler
And (3) modifying the control logic of the target value of the load reduction rate of the boiler, adding an FCB signal triggering link, and changing the target value of the load reduction rate of the boiler to 35% BMCR when the FCB triggering signal is changed from '0' to '1'. When the FCB trigger signal is changed from '1' to '0', the target value of the load reduction rate of the boiler is reset.
10. FCB control logic for modifying coal mill
And (2) modifying the cutting control logic of the coal mill, adding an FCB signal triggering link, starting the cutting control logic of the coal mill when the FCB triggering signal is changed from '0' to '1', cutting 2-3 coal mills in sequence within 5-10 seconds, and only keeping one operation.
11. Transforming mechanical furnace electric interlocking protection logic
The method comprises the step of locking logic and tripping logic of an outlet switch of a main transformer of the generator. The lockout logic is that when the machine, the electricity and the furnace are tripped in an interlocking way, the outlet switch of the main transformer of the generator is locked, and does not participate in the tripping of the machine, the electricity and the furnace in the interlocking way. The tripping logic is that an FCB signal triggering link is added, when the FCB triggering signal is changed from '0' to '1', only an outlet switch of a main transformer of a generator is turned on, and the generator can be reserved with a service high-voltage transformer and a service load, so that an island system is formed.
12. Machine end voltage reference signal acquisition position of improved excitation regulator
The method is characterized in that the generator end voltage reference signal acquisition position of the excitation regulator is changed to be at the position of a generator outlet bus, and the signals of main transformer low-voltage side voltage and a current transformer are acquired. The method can be used for preventing the FCB from collecting the voltage and current transformer signals outside the high-voltage side of the main transformer disconnected with the unit, wherein the signals cannot reflect the real voltage and current values at the generator end.
13. Action logic for transforming main transformer high-voltage side circuit breaker
The action logic of the main transformer high-voltage side circuit breaker from normally closed to normally open is set to be triggered by a signal that the power grid side fault exceeds the protection threshold value of the generator, and meanwhile, the FCB trigger signal is changed from '0' to '1'. The generator set can be disconnected from the main transformer power grid side and the system, and enters an island operation state.
14. Synchronous device for transforming main transformer high-voltage side switch of unit
If the main transformer high-voltage side switch of the unit has no synchronization device, a synchronization device is added. The purpose is that the generator that supplies isolated island operation is automatic synchronizing with the system at main transformer high-pressure side.
For easy understanding, please refer to fig. 3, which is a schematic structural diagram of an ultra-supercritical unit transformation device provided by the present application.
The application second aspect provides an ultra supercritical unit reforms transform device, includes:
the functional index parameter acquisition module 10 is used for respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit;
the transformation module 20 is used for transforming the unqualified indexes until the unqualified indexes are qualified if the unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network;
and the test module 30 is used for performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
Further, the function index parameter obtaining module 10 is further configured to:
if the functional indexes of the bypass system, the water supply system, the steam engine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, the black start capability test is directly carried out on the ultra-supercritical unit with all qualified functional indexes.
Further, the test module 30 is specifically configured to: inspecting equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
The third aspect of the present application provides an ultra supercritical unit transformation device, which includes a processor and a memory:
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is used for executing the ultra-supercritical unit transformation method according to the instructions in the program codes.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the ultra-supercritical unit reconstruction method of the above embodiments.
The terms "comprises," "comprising," and any other variation thereof in the description and the drawings described above are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A transformation method of an ultra-supercritical unit is characterized by comprising the following steps:
respectively acquiring functional index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of the ultra-supercritical unit;
if unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network, the unqualified indexes are modified until the unqualified indexes are qualified;
and carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes.
2. The method for transforming the ultra-supercritical unit according to claim 1, wherein the step of respectively obtaining the functional index parameters of the ultra-supercritical unit coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network further comprises the following steps:
and if the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, directly performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
3. The method for transforming the ultra-supercritical unit according to claim 1, wherein the black start capability test of the ultra-supercritical unit with all functional indexes qualified comprises:
checking equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
4. The method for transforming the ultra-supercritical unit according to claim 1, wherein the transforming the unqualified index until the unqualified index is qualified comprises:
the method comprises at least one modification project of modifying a high-voltage bypass and a low-voltage bypass, modifying safety door configuration of a reheater, modifying a deaerator pressure control loop, modifying a feed pump, modifying a deaerator water tank, modifying DEH action logic, modifying overspeed protection controller action logic, modifying FCB control logic of a boiler load target value, modifying FCB control logic of a boiler load reduction rate, modifying FCB control logic of a coal mill, modifying electric linkage protection logic of a boiler, modifying an excitation regulator, modifying a main transformer high-voltage side circuit breaker and modifying a main transformer high-voltage side switch of a unit.
5. The utility model provides an ultra supercritical unit transformation device which characterized in that includes:
the system comprises an acquisition function index parameter module, a control module and a management module, wherein the acquisition function index parameter module is used for respectively acquiring function index parameters of a bypass system, a water supply system, a steam turbine control system, a boiler control system, a combustion management system, a comprehensive control system and machine network coordination of an ultra-supercritical unit;
the improvement module is used for improving the unqualified indexes until the unqualified indexes are qualified if the unqualified indexes exist in the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network;
and the test module is used for carrying out black start capability test on the ultra-supercritical unit with all qualified functional indexes.
6. The apparatus according to claim 5, wherein the module for obtaining functional index parameters is further configured to:
and if the functional indexes coordinated by the bypass system, the water supply system, the steam turbine control system, the boiler control system, the combustion management system, the comprehensive control system and the machine network are all qualified, directly performing a black start capability test on the ultra-supercritical unit with all qualified functional indexes.
7. The ultra supercritical unit revamping device according to claim 5, characterized in that the test module is specifically configured to:
checking equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
8. The ultra supercritical unit revamping device according to claim 5, characterized in that the test module is specifically configured to: checking equipment of the ultra-supercritical unit;
testing the inspected ultra-supercritical unit;
and obtaining a test result, and evaluating the test result.
9. An ultra supercritical unit reconstruction apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the ultra-supercritical unit modification method according to any one of claims 1 to 4 according to instructions in the program code.
10. A computer-readable storage medium for storing program code for performing the ultra supercritical unit reconstruction method according to any one of claims 1 to 4.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876597A (en) * | 2022-05-19 | 2022-08-09 | 西安热工研究院有限公司 | System and method for realizing thermal power generating unit island operation by coupling molten salt energy storage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4103178A (en) * | 1977-03-11 | 1978-07-25 | Westinghouse Electric Corp. | Black start system for large steam powered electric generation plants |
| JPS58167812A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Self starting method of combined cycle plant |
| CN101236575A (en) * | 2008-01-30 | 2008-08-06 | 山东大学 | Black start assistant decision making support/training system and its method |
-
2019
- 2019-12-26 CN CN201911368562.0A patent/CN111120020B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4103178A (en) * | 1977-03-11 | 1978-07-25 | Westinghouse Electric Corp. | Black start system for large steam powered electric generation plants |
| JPS58167812A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Self starting method of combined cycle plant |
| CN101236575A (en) * | 2008-01-30 | 2008-08-06 | 山东大学 | Black start assistant decision making support/training system and its method |
Non-Patent Citations (1)
| Title |
|---|
| 卢恩: "基于大型火电机组 FCB技术的电力系统智能恢复控制研究与应用", 《华南理工大学博士学位论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876597A (en) * | 2022-05-19 | 2022-08-09 | 西安热工研究院有限公司 | System and method for realizing thermal power generating unit island operation by coupling molten salt energy storage |
| CN114876597B (en) * | 2022-05-19 | 2024-01-23 | 西安热工研究院有限公司 | System and method for realizing island operation of thermal power generating unit by coupling molten salt energy storage |
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