CN104578060B - Method for selecting black-start diesel engine of SFC self-start gas turbine set - Google Patents
Method for selecting black-start diesel engine of SFC self-start gas turbine set Download PDFInfo
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- CN104578060B CN104578060B CN201510032881.XA CN201510032881A CN104578060B CN 104578060 B CN104578060 B CN 104578060B CN 201510032881 A CN201510032881 A CN 201510032881A CN 104578060 B CN104578060 B CN 104578060B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
Abstract
The invention discloses a method for selecting a black-start diesel engine of an SFC self-start gas turbine set, and belongs to the field of control and regulation of generators. SFC is the main start mode of the gas turbine set, and due to the fact that generally, the ratio of an SFC load to the total load of a black-start system is larger than 50%, the SFC load is the key factor for determining the capacity of the black-start diesel engine. In the starting process, the power of the black-start diesel engine should be not smaller than the sum of the start power of the load and the steady-state power of all the loads which operate before the load is started, and the capacity of the black-start diesel engine should is not smaller than the sum of the start capacity of the load and the steady-state capacity of all the loads which operate before the load is started. For the same black-start system load, the load starting sequence of an SFC gas turbine is different, and the selection of the capacity of the black-start diesel engine is correspondingly different. By means of the method, the capacity of the black-start diesel engine can be accurately calculated, and the purpose of accurately selecting types is achieved.
Description
Technical field
The invention belongs to electromotor control with regulation field and in particular to a kind of SFC self-starting gas turbine group black
Start the system of selection of diesel engine.
Background technology
After black starting-up refers to that whole electrical network hinders stoppage in transit for some reason, it is independent of other electrical networks and helps, certainly opened by having in system
Kinetic force unit (black starting-up diesel generating set) starts, and drives non self starting unit (gas turbine group), gradually expands
System recovery scope, finally realizes the recovery of whole system.
Black starting-up power supply is extremely important to power plant, must ensure that it can reliable and stable run it is desirable to black starting-up system is simpler
Single better；The motor-type load typically having relatively high power in black starting-up system needs to start, in short-term dash current very big it is desirable to black
Start unit strong shock resistance in short-term；The black starting-up unit operation time is short, and number of run is few, therefore does not require the black starting-up unit can
Continuous operation, but need to adapt to short time high capacity operation.
In initial start stage, unit cannot provide powerful staring torque voluntarily to start to gas turbine group, starting of static frequency conversion
Device (SFC：Static Frequency Converter) it is the alternating current power supply producing changeable frequency using thyristor frequency converter
Unit is started, is the main Starting mode of gas turbine group.SFC is typically by input tranformer, harmonic filter, control
Device, commutator, inverter and direct current reactor composition.The effect of SFC device is to provide electric power so as to be changed into electronic to electromotor
Machine runs, and is added in the frequency of generator power supply by adjustment, realizes generator amature rotating speed continuously adjustabe.Generally,
SFC system is powered (under black starting-up state, by black starting-up diesel-driven generator by the working power being connected on station-service high voltage bus
Group power supply), SFC device will input the voltage that is basically unchanged and frequency is changed into variable voltage and frequency, and by this electric energy
It is supplied to the stator winding of electromotor, make electromotor be turned into synchronous motor in startup stage.Its result is exactly to be made by SFC
Electromotor accelerates, and after reaching certain rotating speed, gas turbine starts ignition operation, makes combustion gas together with the electromotor driving with SFC
Turbine accelerates, and after reaching the rated speed of electromotor, SFC system cut-off is so as to the voltage being added on electromotor is 0, now
Electromotor is rotated by gas turbine, then accesses excitation, normal power generation.
It can be seen that, when electric network fault is stopped transport, black starting-up diesel engine is exactly heavy to closing for the startup of gas turbine group
Will, and capacity is a key parameter of black starting-up diesel engine.Capacity Selection is too small, can lead to black opening when gas turbine starts
Dynamic diesel engine stops working or generating voltage is too low leads to gas turbine cannot start at all；Capacity Selection is excessive, can cause transport, peace
The difficulty of dress and unnecessary waste, increase maintenance workload.
At present, the domestic standard criterion not having correlation selects to make clear stipulaties to black starting-up diesel capacity, and engineering sets
Diesel-driven generator Capacity Selection Primary Reference in meter《Thermal power plant station service designing technique regulation》DL/T5153-2002 annex
D " selection of diesel generating set ".But this regulation is a more general principle being applied to all diesel engines, not specially
Door selects for the black starting-up diesel capacity of SFC self-starting gas turbine group.
Content of the invention
For the defect overcoming above-mentioned prior art to exist, it is an object of the invention to provide a kind of SFC self-starting combustion vapour
The system of selection of the black starting-up diesel engine of wheel unit, the method is by being calculated capacity and the power of required black starting-up diesel engine
Scope, and carry out type selecting according to the specification sequence of black starting-up diesel engine within this range, the purpose of accurate type selecting can be reached.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of system of selection of the black starting-up diesel engine of SFC self-starting gas turbine group, comprises the following steps：
1) by being calculated the capacity of black starting-up diesel engine and the value range of power, computing formula is as follows：Wherein,
The unit of capacity is kVA, and the unit of power is kW；
S≥max{Ssteady, Stransitory}；
P≥max{Psteady, Ptransitory}；
Wherein, Stransitory=Ssteady F+Smax start；
Ptransitory=Psteady F+Pmax start；
S：Black starting-up diesel capacity value range；
P：Black starting-up diesel engine power value range；
Ssteady：Black starting-up system loading steady state capacity value sum；
Psteady：Black starting-up system loading steady state power value sum；
Ssteady F：Peak load in black starting-up system loading start before the load of operation steady state capacity value sum；
Psteady F：Peak load in black starting-up system loading start before the load of operation steady state power value sum；
Smax start：The starting capacity value of the peak load in black starting-up system loading；
Pmax start：The startup performance number of the peak load in black starting-up system loading；
2) in step 1) take in the capacity of black starting-up diesel engine that obtains and the value range of power and meet black starting-up diesel engine
The capacity minima of specification sequence and power minimum, when the capacity minima meeting black starting-up diesel engine specification sequence and power
When minima belongs to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine；When meeting black starting-up diesel engine
When the capacity minima of specification sequence and power minimum are not belonging to same black starting-up diesel engine specification, then select wherein higher rule
The black starting-up diesel engine of lattice.
Further, black starting-up system loading includes resistive load and induction-motor load.
Further, black starting-up system loading include SFC, combustion engine MCC, air compressor machine, oil feed pump, water-bath stove, bypass electronic
Actuator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption and cooling water pump.
Further, the boot sequence of black starting-up system loading is：Combustion engine MCC, water-bath stove, oil feed pump, bypass is electronic to hold
Row mechanism, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, air compressor machine, SFC.
Further, the boot sequence of black starting-up system loading is：Combustion engine MCC, water-bath stove, oil feed pump, bypass is electronic to hold
Row mechanism, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, SFC, air compressor machine.
Compared with prior art, the present invention has following beneficial technique effect：
The start-up characteristic fully based on SFC self-starting gas turbine group for the present invention, SFC is mainly opening of gas turbine group
Flowing mode, because the ratio that SFC is supported in black starting-up system total load has typically been above 50%, is to determine diesel-driven generator
The key factor of pool-size, the present invention is by being calculated the capacity of required black starting-up diesel engine and the scope of power, and here
In the range of carry out type selecting according to the specification sequence of black starting-up diesel engine, this method can accurately select the appearance of black starting-up diesel engine
Amount, both will not be too small because of Capacity Selection, diesel engine can be led to when gas turbine starts flame-out or generating voltage is too low leads to
Gas turbine cannot start at all；Also will not be excessive because of Capacity Selection, cause transport, the difficulty installed and unnecessary wave
Take, increase maintenance workload, be very significant for the construction of turbine power plant and safety and economic operation.
Further, it is generally the case that the boot sequence of black starting-up load is according to main generator during black starting-up
Startup require, or the requirement of operation, being previously set it is impossible to do too many change, but if insignificant negative to some
Lotus carries out rearranging boot sequence, still can reduce the selection of diesel generating set power and capacity, thus reducing startup
Equipment investment.
Specific embodiment
Below the present invention is described in further detail：
Black starting-up diesel engine needs the load of power supply to be divided into resistive load and induction-motor load.The capacity of resistive load
Less, and when putting into, often simply require being incremented by of black starting-up diesel engine active power, therefore black starting-up diesel capacity is selected
Select impact less.And for induction-motor load, during different Starting mode (directly initiate, soft start, reduced-voltage starting, variable frequency starting
Deng) starting capacity difference is larger, therefore, induction-motor load selects impact larger black starting-up diesel capacity, particularly maximum
Induction-motor load.Calculate the capacity of black starting-up diesel engine and the formula of the value range of power is as follows：
S≥max{Ssteady, Stransitory}；
P≥max{Psteady, Ptransitory}；
Wherein,
S：Black starting-up diesel capacity value range (kVA)；
P：Black starting-up diesel engine power value range (kW)；
Ssteady：Black starting-up system loading steady state capacity value sum (kVA)；
Psteady：Black starting-up system loading steady state power value sum (kW)；
Wherein, Stransitory=Ssteady F+Smax start；
Ptransitory=Psteady F+Pmax start；
Stransitory：Operation before the startup of the starting capacity of the peak load in black starting-up system loading and peak load
The steady state capacity sum (kVA) of all loads；
Ptransitory：Peak load in black starting-up system loading start before the startup of power and peak load operation
The steady state power sum (kW) of all loads；
Ssteady F:Peak load in black starting-up system loading start before the load of operation steady state capacity value sum
(kVA)；
Psteady F：Peak load in black starting-up system loading start before the load of operation steady state power value sum
(kW)；
Smax start：The starting capacity value (kVA) of the peak load in black starting-up system loading；
Pmax start：The startup performance number (kW) of the peak load in black starting-up system loading；
The boot sequence of black starting-up system loading has important shadow to the power of black starting-up diesel engine and the selection of capacity
Ring.For same black starting-up system loading, the boot sequence of black starting-up system loading is different, the capacity choosing of black starting-up diesel engine
Select corresponding difference.In order to reduce the capacity of black starting-up diesel engine as far as possible, on the premise of meeting black starting-up preparation, should preferentially open
Move jumbo load, then access other loads again.Under normal circumstances, the boot sequence of black starting-up system loading is according to master
The startup of electromotor requires, or the requirement of operation, being previously set it is impossible to do too many change, but if non-to some
Important load carries out rearranging boot sequence, still can reduce the selection of black starting-up diesel engine power and capacity, thus dropping
Low starting device investment.When the calculated capability value of black starting-up diesel engine is larger, then need using multiple stage diesel engine unit
Close configuration, be now considered as and machine trueness error fall holds coefficient.
Below by specific embodiment, the present invention will be further described：
Certain engineering is two 90MW steam units and five 65MW gas turbine group, and every gas turbine group is provided with a set of
Starting of static frequency conversion device (SFC), by SFC self-starting combustion engine.Black starting-up system loading inventory as shown in table 1, can by table 1
See, in this project, SFC is supported on ratio in total load considerably beyond 50%, is to determine the key factor of unit capacity.Its
In, converter is 12 impulse commutation PWM inversion outputs, and efficiency is 90%, and nominal operation power factor is 0.9, sets and starts electricity
Ductility limit is made as 200%.
Table 1 black starting-up system loading inventory
Embodiment 1
Table 2 lists a start-up operation sequence scheme of black starting-up system loading.
Table 2 embodiment 1 black starting-up load capacity and power list
From embodiment 1,
S≥max{Ssteady, Stransitory}=max { 4626.6,5274.1 }=5274.1kVA；
P≥max{Psteady, Ptransitory}=max { 3726.3,4244.3 }=4244.3kW.
P in embodiment 1steady=3726.3kW, is black starting-up system loading steady state power value sum；Ssteady=
4626.6kVA, is black starting-up system loading steady state capacity value sum；Ptransitory=4244.3kW, is black starting-up system loading
In peak load the steady state power sum starting all loads of operation before the startup of power and peak load；Stransitory
=5274.1kVA is all of operation before the starting capacity of peak load and peak load startup in black starting-up system loading
The steady state capacity sum of load.
As can be seen from the above results, in embodiment 1 calculated black starting-up diesel engine capacity >=5274.1kVA,
Power >=4244.3kW, then take the capacity minima meeting black starting-up diesel engine specification sequence and power minimum in this scope
Value, when the capacity minima and power minimum meeting black starting-up diesel engine specification sequence belongs to same black starting-up diesel engine specification
When, then select this specification black starting-up diesel engine；When the capacity minima meeting black starting-up diesel engine specification sequence and power are minimum
When value is not belonging to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
Embodiment 2
Table 3 lists another start-up operation sequence scheme of black starting-up system loading.
Table 3 embodiment 2 black starting-up load capacity and power list
From embodiment 2,
S≥max{Ssteady, Stransitory}=max { 4626.6,5586.6 }=5586.6kVA；
P≥max{Psteady, Ptransitory}=max { 3726.3,4494.3 }=4494.3kW.
P in embodiment 2steady=3726.3kW, is black starting-up system loading steady state power value sum；Ssteady=
4626.6kVA, is black starting-up system loading steady state capacity value sum；Ptransitory=4494.3kW, is black starting-up system loading
In peak load the steady state power sum starting all loads of operation before the startup of power and peak load；Stransitory
=5586.6kVA is all of operation before the starting capacity of peak load and peak load startup in black starting-up system loading
The steady state capacity sum of load.
As can be seen from the above results, in embodiment 2 calculated black starting-up diesel engine capacity >=5586.6kVA,
Power >=4494.3kW, then take the capacity minima meeting black starting-up diesel engine specification sequence and power minimum in this scope
Value, when the capacity minima and power minimum meeting black starting-up diesel engine specification sequence belongs to same black starting-up diesel engine specification
When, then select this specification black starting-up diesel engine；When the capacity minima meeting black starting-up diesel engine specification sequence and power are minimum
When value is not belonging to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
Can be seen that the black starting-up that two schemes are different due to boot sequence, calculate from embodiment 1 with embodiment 2
Diesel capacity is different with the value range of power, in scheme one SFC start relatively early, the black starting-up diesel capacity calculating and
Power is less.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention
The specific embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the present invention by institute
The claims submitted to determine scope of patent protection.
Claims (5)
1. a kind of system of selection of the black starting-up diesel engine of SFC self-starting gas turbine group is it is characterised in that include following walking
Suddenly：
1) by being calculated the capacity of black starting-up diesel engine and the value range of power, computing formula is as follows：Wherein, capacity
Unit be kVA, the unit of power is kW；
S≥max{Ssteady, Stransitory}；
P≥max{Psteady, Ptransitory}；
Wherein, Stransitory=Ssteady F+Smax start；
Ptransitory=Psteady F+Pmax start；
S：Black starting-up diesel capacity value range；
P：Black starting-up diesel engine power value range；
Ssteady：Black starting-up system loading steady state capacity value sum；
Psteady：Black starting-up system loading steady state power value sum；
Ssteady F：Peak load in black starting-up system loading start before the load of operation steady state capacity value sum；
Psteady F：Peak load in black starting-up system loading start before the load of operation steady state power value sum；
Smax start：The starting capacity value of the peak load in black starting-up system loading；
Pmax start：The startup performance number of the peak load in black starting-up system loading；
2) in step 1) take in the capacity of black starting-up diesel engine that obtains and the value range of power and meet black starting-up diesel engine specification
The capacity minima of sequence and power minimum, when the capacity minima meeting black starting-up diesel engine specification sequence and power are minimum
When value belongs to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine；When meeting black starting-up diesel engine specification
When the capacity minima of sequence and power minimum are not belonging to same black starting-up diesel engine specification, then select wherein high gauge
Black starting-up diesel engine.
2. the system of selection of the black starting-up diesel engine of a kind of SFC self-starting gas turbine group according to claim 1, it is special
Levy and be, black starting-up system loading includes resistive load and induction-motor load.
3. the system of selection of the black starting-up diesel engine of a kind of SFC self-starting gas turbine group according to claim 1, it is special
Levy and be, black starting-up system loading includes SFC, combustion engine MCC, air compressor machine, oil feed pump, water-bath stove, bypass electric operator, hydrocarbon
Pump, electric operator, ups power, cabinet electricity consumption and cooling water pump.
4. the system of selection of the black starting-up diesel engine of a kind of SFC self-starting gas turbine group according to claim 3, it is special
Levy and be, the boot sequence of black starting-up system loading is：Combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon
Pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, air compressor machine, SFC.
5. the system of selection of the black starting-up diesel engine of a kind of SFC self-starting gas turbine group according to claim 3, it is special
Levy and be, the boot sequence of black starting-up system loading is：Combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon
Pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, SFC, air compressor machine.
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| CN110943489A (en) * | 2018-09-25 | 2020-03-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Capacity determination method and device of generator, computer equipment and storage medium |
| CN109726914A (en) * | 2018-12-28 | 2019-05-07 | 国家电网有限公司 | A kind of unit recovery sorting consistence method considering starting efficiency decaying |
| CN110056437B (en) * | 2019-04-24 | 2022-03-11 | 南京泰润电力工程有限公司 | Starting method of diesel generator |
| CN111668874B (en) * | 2020-07-08 | 2022-07-19 | 国网江苏省电力有限公司无锡供电分公司 | Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant |
| CN111934349A (en) * | 2020-08-10 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Diesel engine capacity optimization method based on isolated power grid black start |
| CN112648080A (en) * | 2021-01-11 | 2021-04-13 | 大连欧谱纳透平动力科技有限公司 | Black start system of gas turbine |
| CN112653189B (en) * | 2021-01-20 | 2023-02-03 | 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 |
| CN113530686A (en) * | 2021-07-15 | 2021-10-22 | 中国华能集团清洁能源技术研究院有限公司 | Black start system and method for gas turbine with multi-charging-discharging-rate energy storage |
| CN113922495A (en) * | 2021-10-13 | 2022-01-11 | 阳光电源(南京)有限公司 | Energy storage power station and black start method |
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| CN102904251B (en) * | 2012-10-23 | 2014-09-10 | 广东电网公司电力调度控制中心 | Method and system for configuring thermal power generating units to carry out self-healing of power grid |
| CN104065065B (en) * | 2014-07-16 | 2016-04-06 | 福建省电力勘测设计院 | Utilize the double method making emergency power supply diesel engine generator of black starting-up diesel engine generator |
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