CN110163490A - A kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method - Google Patents
A kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method Download PDFInfo
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Abstract
The present invention discloses a kind of integrated energy system faults coupling and propagates Energy Quantization analysis and suppressing method, the following steps are included: before being primarily based on natural gas system failure with through fault recovery to stable state when amount of natural gas conservation, obtain natural gas system fault energy quantization method；Energy conversion process in analysis integrated energy resource system later obtains the energy conversion mathematic(al) representation of integrated energy system；Later based on conservation of energy quantitative analysis electric system, heat supply/cooling system fault energy, show that integrated energy system faults coupling propagates Energy Quantization analysis method；It finally obtains and reduces the method that faults coupling propagates energy to inhibit faults coupling to propagate using wisdom gas pressure regulator, governor.
Description
Technical field
The present invention is that a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method, belongs to comprehensive energy
Source system safe and stable operation field.
Background technique
Integrated energy system is the energy supply system collectively constituted by electric power, natural gas and heat supply/cooling system.In order to answer
To the fossil energy crisis got worse and problem of environmental pollution, the comprehensive utilization ratio for improving the energy is trend of the times, comprehensive
Energy resource system by feat of energy coupling close, complementary mutually Ji, it can be achieved that many advantages, such as cascade utilization and the collaboration optimization of the energy,
It has been increasingly becoming one of the primary selection of energy resource system of new generation.Integrated energy system is in natural gas of combining closely, electric power and confession
While hot/cold system, the faults coupling of triangular web is also propagated into other energy resource systems, and then may cause chain event
Barrier, such as the cause of Taiwan " 815 " large area blackout is that natural gas system failure causes 6 Gas Generator Sets to stop
Machine.Therefore, faults coupling communication process when analyzing failure in integrated energy system is particularly significant and urgent.
Currently, researchers at home and abroad are still in the elementary step for the research of this respect, and most of is to pass through analysis
The dynamic process of integrated energy system builds suitable dynamic model to analyze faults coupling communication process.Natural gas, electric power and
Heat supply/cooling system time constant difference is huge, and electric system time constant is measured in seconds, belongs to typical fast time constant system
System, and natural gas, heat supply/cooling system then belong to typical slow time constant system, time scale must be with minutes or even small
Shi Jiliang.Therefore, from the faults coupling communication process in the angular quantification analysis system of time domain, there is very big difficulties.
Based on background above, the present invention creatively proposes to analyze faults coupling communication process from the angular quantification of energy,
Caused energy variation amount is propagated to measure the harm caused by propagating because of faults coupling by analysis faults coupling, and is based on
This quantization method proposes that reducing faults coupling using wisdom gas pressure regulator, governor propagates energy to inhibit in combination with Internet of Things technology
The method that faults coupling is propagated.
Summary of the invention
In order to realize the quantitative analysis and inhibition of propagating integrated energy system faults coupling energy, the present invention is " a kind of comprehensive
Close energy resource system faults coupling propagate Energy Quantization analysis and suppressing method " first quantitative analysis failure when natural gas system in
Energy variation；Conversion process of energy in analysis integrated energy resource system later；And then it is based on the conservation of energy, quantitative analysis electric system
And fault energy in heat supply/cooling system, show that integrated energy system faults coupling propagates Energy Quantization analysis method；Finally it is based on
Above-mentioned quantization method proposes that reducing faults coupling using wisdom gas pressure regulator, governor propagates energy to inhibit in combination with Internet of Things technology
The method that integrated energy system faults coupling is propagated.
The invention mainly comprises the following steps:
Step 1: obtaining fault energy quantization method in natural gas system；
Step 2: obtaining the energy conversion mathematic(al) representation in integrated energy system；
Step 3: based on the fault energy in conservation of energy quantitative analysis electric system, heat supply/cooling system, obtaining comprehensive energy
Energy Quantization analysis method is propagated in system failure coupling in source；
Step 4: being based on above-mentioned quantization method, in combination with Internet of Things technology, obtain and reduce failure using wisdom gas pressure regulator, governor
The method that coupling propagates energy to inhibit faults coupling to propagate.
Detailed description of the invention
Fig. 1 is integrated energy system schematic diagram
Specific embodiment
The specific steps of the present invention are as follows:
Step 1: obtaining fault energy quantization method in natural gas system
By thermodynamic (al) content it is found that the pressure of constant gas in container depends on gas in container under steady temperature
Amount.For natural gas system, it is that the amount of natural gas in natural gas line is kept constant that pressure, which maintains stable premise,.When
When natural gas system is normal, the quality stream M of natural gas system is flowed intoinEqual to the quality stream M of outflow natural gas systemout, therefore,
The amount of natural gas in natural gas system is in constant always at this time, then system pressure is also at stable state；When natural gas occurs
Failure or by other systems faults coupling propagate caused by influence when, MinOr MoutIt will change, since system is used
Property, MoutOr MinIt will be late by MinOr MoutVariation, then the amount of natural gas in natural gas system will change, pressure also will therewith
Variation.Based on principles above, it is known that before natural gas system failure with amount of natural gas conservation when restoring after failure to stable state, the mistake
Journey can be indicated with mathematical expression shown in formula (1):
In formula, t1, t2 are respectively that time of fault inception, natural gas system pressure restore to steady-state value to obtain time, Δ Min、Δ
MoutIt is natural gas system inlet mass stream variable quantity, outgoing quality stream variable quantity respectively.
Combustion of natural gas calorific value H is introduced, then formula (1) can be rewritten as to the form of energy, specifically as shown in formula (2):
Formula (2) is natural gas system fault energy quantization mathematic(al) representation.
Step 2: obtaining the energy conversion mathematic(al) representation in integrated energy system
In integrated energy system, natural gas system is miniature gas turbine, gas fired-boiler provides fuel, micro-gas-turbine
Machine output mechanical power PTDriven generator power generation, gas fired-boiler is then with heating power PthWater is heated to meet the hot/cold of user
Workload demand, the conversion process of energy can be indicated with formula (3) in integrated energy system:
In formula, η1、η2Respectively miniature gas turbine, gas fired-boiler efficiency.
Step 3: based on the fault energy in conservation of energy quantitative analysis electric system, heat supply/cooling system, obtaining comprehensive energy
Energy Quantization analysis method is propagated in system failure coupling in source
By the conservation of energy it is found that natural gas system outgoing quality stream variation delta MoutIt is defeated to be converted into miniature gas turbine
Mechanical output variation delta P outTAnd gas fired-boiler heating power variation delta Pth, it is assumed that during failure, miniature gas turbine
It is remained unchanged with the efficiency of gas fired-boiler, then the process can be indicated with formula (4):
In formula, Δ Min、ΔPT、ΔPthIt is natural gas system inlet mass stream variable quantity, miniature gas turbine output respectively
Mechanical output variable quantity, gas fired-boiler heating power variable quantity.
Since the dimension difference of each amount in formula (4) is huge, for ease of calculation, per unit value can be used and calculated,
Middle a reference value PBAre as follows:
PB=HMout0 (5)
In formula, Mout0For natural gas system outgoing quality stream steady-state value.
Because outgoing quality stream a part of natural gas system flows to miniature gas turbine, another part then flows to gas-fired boiler
Furnace, the process can be indicated with formula (6):
In formula, k is the constant less than 1, to indicate to flow to the amount of natural gas proportion of miniature gas turbine.
The per unit value form of formula (4) can be obtained in convolution (4), (5) and (6) are as follows:
In formula,Indicate Δ MinPer unit value.
Formula (7) is that integrated system faults coupling propagates Energy Quantization expression formula.
Step 4: being based on above-mentioned quantization method, in combination with Internet of Things technology, obtain and propagate energy suppression by reducing faults coupling
The method that faults coupling processed is propagated
In order to effectively inhibit the faults coupling in integrated energy system to propagate, the present invention is proposed in integrated energy system and city
Wisdom gas pressure regulator, governor is installed in political affairs natural gas system junction, and wherein wisdom gas pressure regulator, governor, which refers to, applies technology of Internet of things
Gas pressure regulator, governor.The suppressing method detects pressure regulator upstream and downstream pressure, quality stream information first with sensor, and passes through signal
Transmitting module gives these information to control centre by high speed network, and control centre feeds back corresponding according to the information received
It controls signal and is reached to pressure regulator with controlling the quality of natural gas stream by pressure regulator and stablizing gas downstream pressure in event
Reduce Δ M when barrierinPurpose, to realize the control propagated faults coupling.
Claims (5)
1. a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method, it is characterised in that:
(1) natural gas system fault energy quantization method is obtained；
(2) the energy conversion mathematic(al) representation of integrated energy system is obtained；
(3) based on conservation of energy quantitative analysis electric system, heat supply/cooling system fault energy, integrated energy system event is obtained
Energy Quantization analysis and suppressing method are propagated in barrier coupling；
(4) it is based on fault energy quantization method, in combination with Internet of Things technology, obtains and reduces faults coupling using wisdom gas pressure regulator, governor
Propagate the method that Energy suppression faults coupling is propagated.
2. a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method according to claim 1,
It is characterized in that, step (1) obtains natural gas system fault energy quantization method detailed process are as follows:
Amount of natural gas conservation when before natural gas system failure with through fault recovery to stable state, the process can be indicated with formula (1):
In formula, t1, t2 are respectively that time of fault inception, natural gas system pressure restore to steady-state value to obtain time, Δ Min、ΔMout
It is natural gas system inlet mass stream variable quantity, outgoing quality stream variable quantity respectively；
Combustion of natural gas calorific value H is introduced, then formula (1) can be rewritten as to the form of energy, specifically as shown in formula (2):
Formula (2) is natural gas system fault energy quantization mathematic(al) representation.
3. a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method according to claim 1,
It is characterized in that, step (2) obtains the energy conversion mathematic(al) representation detailed process of integrated energy system are as follows:
In integrated energy system, natural gas system is miniature gas turbine, gas fired-boiler provides fuel, and miniature gas turbine is defeated
Mechanical output P outTDriven generator power generation, gas fired-boiler is then with heating power PthWater is heated to meet the hot/cold load of user
Demand, the conversion process of energy can be indicated with formula (3) in integrated energy system:
In formula, η1、η2Respectively miniature gas turbine, gas fired-boiler efficiency；
Formula (3) is integrated energy system energy conversion mathematic(al) representation.
4. a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method according to claim 1,
It is characterized in that, step (3) obtains comprehensive energy based on conservation of energy quantitative analysis electric system, heat supply/cooling system fault energy
Energy Quantization analysis and suppressing method, detailed process are propagated in system failure coupling in source are as follows:
Known by the conservation of energy, natural gas system outgoing quality stream variation delta MoutIt is mechanical to be converted into miniature gas turbine output
Power variation Δ PTAnd heat supply/cooling system heating power variation delta Pth, it is assumed that in failure, miniature gas turbine and combustion
The efficiency of gas boiler is constant, then the process is indicated with formula (4):
For ease of calculation, formula (4) is turned into per unit value form, wherein a reference value PB=HMin0, Min0For natural gas system entrance
Quality stream steady-state value, formula (4) per unit value form are as follows:
In formula, k is to flow to the gas quantity of miniature gas turbine to account for the ratio of natural gas system outgoing quality stream,Indicate Δ
MinPer unit value, it is other same as above；
Formula (5) is that integrated system faults coupling propagates Energy Quantization expression formula.
5. a kind of integrated energy system faults coupling propagates Energy Quantization analysis and suppressing method according to claim 1,
It is characterized in that, step (4) is based on fault energy quantization method, in combination with Internet of Things technology, obtains by subtracting using wisdom pressure regulator
The method that glitch coupling propagates energy to inhibit faults coupling to propagate, specifically:
Wisdom gas pressure regulator, governor is installed in integrated energy system and municipal natural gas system junction, wherein wisdom pressure regulator refers to
Apply the gas pressure regulator, governor of technology of Internet of things, specific work process are as follows: first with sensor perception pressure regulator upstream and downstream pressure
Strong and quality stream information, and emitted these information to control centre, the corresponding letter of control centre's feedback by signal emission module
Breath reaches the reduction Δ M in failure to pressure regulator to adjust pressure regulator control quality of natural gas stream and downstream pressureinPurpose,
To realize the control propagated faults coupling.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494021A (en) * | 2018-04-20 | 2018-09-04 | 东北大学 | The Stability Assessment of electric-thermal-gas integrated energy system and static cost control method |
| CN108717598A (en) * | 2018-04-25 | 2018-10-30 | 南京工程学院 | Index calculating method temporarily drops in the network voltage of electric-gas interconnection integrated energy system |
| CN108875277A (en) * | 2018-07-23 | 2018-11-23 | 长沙理工大学 | A kind of multipotency streaming system static security analysis method considering natural gas system N-1 |
| CN109615248A (en) * | 2018-12-14 | 2019-04-12 | 浙江大学 | A kind of cascading failure in power system estimation method for considering natural gas system and influencing |
| CN109685397A (en) * | 2019-01-31 | 2019-04-26 | 武汉理工大学 | A kind of meter and direct load control lower electrical couplings system reliability estimation method |
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- 2019-04-28 CN CN201910351986.XA patent/CN110163490A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494021A (en) * | 2018-04-20 | 2018-09-04 | 东北大学 | The Stability Assessment of electric-thermal-gas integrated energy system and static cost control method |
| CN108717598A (en) * | 2018-04-25 | 2018-10-30 | 南京工程学院 | Index calculating method temporarily drops in the network voltage of electric-gas interconnection integrated energy system |
| CN108875277A (en) * | 2018-07-23 | 2018-11-23 | 长沙理工大学 | A kind of multipotency streaming system static security analysis method considering natural gas system N-1 |
| CN109615248A (en) * | 2018-12-14 | 2019-04-12 | 浙江大学 | A kind of cascading failure in power system estimation method for considering natural gas system and influencing |
| CN109685397A (en) * | 2019-01-31 | 2019-04-26 | 武汉理工大学 | A kind of meter and direct load control lower electrical couplings system reliability estimation method |
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