CN109991494A - A kind of electric-thermal coupled system fault early warning method and prior-warning device - Google Patents
A kind of electric-thermal coupled system fault early warning method and prior-warning device Download PDFInfo
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- CN109991494A CN109991494A CN201910242316.4A CN201910242316A CN109991494A CN 109991494 A CN109991494 A CN 109991494A CN 201910242316 A CN201910242316 A CN 201910242316A CN 109991494 A CN109991494 A CN 109991494A
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Abstract
The embodiment of the invention discloses a kind of electric-thermal coupled system fault early warning method and prior-warning device, method includes obtaining the data of electric-thermal coupled system element, determines the initial operating state of system；Element fault in electro thermal coupling system is successively simulated, the data of more new system determine current failure load resection caused by system using optimal models；Judge whether the load resection is more than system loading resection threshold value, and when being more than threshold value, issues warning signal.Described device is separately connected electric-thermal coupled system and scheduling institution.The present invention is based on system current operating conditions, the influence that forecast failure generates electric-thermal coupled system is simulated, and provides pre-warning signal to scheduling institution, accurate, effectively progress failure influences anticipation.Regulating and controlling mechanism can propose contingency plan for the failure, avoid causing heavy losses after actually there is original text failure.
Description
Technical field
The present invention relates to various energy resources system failure prevention and disposition technical field, specifically a kind of electric-thermal coupled systemes
System fault early warning method and prior-warning device.
Background technique
With the large-scale application of heat pump techniques, electric system and the coupling of therrmodynamic system are constantly close.As shown in Figure 1,
Electric-thermal coupled system mainly includes electric system, therrmodynamic system and heat pump three parts, and wherein heat pump connects therrmodynamic system and electric power
System, the electric energy consumed in electric system provide thermal energy to therrmodynamic system.Therrmodynamic system includes multiple heating power nodes, each heating power
Heat power equipment and heating power load be installed on node, is connected between heating power node by pipeline, have in pipeline water as medium to
Heating power load provides thermal energy.It is influenced by heating power load and heat pump, the input temp of heating power node is different from output temperature, electric power
System is mainly made of multiple power nodes, is had generator and electric load on each power node, is led between each power node
Route is crossed to be connected.
In day-to-day operation, any element failure all will give the safety of another system can in therrmodynamic system or electric system
Huge challenge is brought by operation, the integrity problem of electric-thermal coupled system is gradually taken seriously.Existing fault pre-alarming device is only capable of
The failure of triangular web in early warning therrmodynamic system or electric system can not handle the case where two kinds of energy resource systems of electric-thermal couple, because
This lacks a kind of device that can effectively break down in early warning electric-thermal coupled system at this stage.If still pre- using existing failure
Alarm device may make the failure occurred in therrmodynamic system be difficult to timely and effectively be detected next, the influence to electric system
Also it is difficult to effectively assess, and then the failure in electric-thermal coupled system is caused to be difficult to solve, thus system safe and stable operation faces
Biggish risk.
Summary of the invention
A kind of electric-thermal coupled system fault early warning method and prior-warning device are provided in the embodiment of the present invention, it is existing to solve
There is in technology the failure that can not effectively occur in early warning electric-thermal coupled system, huge prestige is caused to the safe and stable operation of system
The problem of side of body.
In order to solve the above-mentioned technical problem, the embodiment of the invention discloses following technical solutions:
First aspect present invention provides a kind of electric-thermal coupled system fault early warning method, comprising the following steps:
The data for obtaining electric-thermal coupled system element, determine the initial operating state of system；
Element fault in electro thermal coupling system is successively simulated, the data of more new system determine current event using optimal models
Hinder the load resection caused by system；
Judge whether the load resection is more than system loading resection threshold value, and when being more than threshold value, issues early warning
Signal.
Further, the initial operating state of the system include the output power of generator, generator maximum power,
The electricity that node voltage, route electrical power, node thermic load, the input temp of node and output temperature, environment temperature, heat pump consume
Power, the thermal power of generation and electric heating ratio.
Further, the objective function of the optimal models are as follows:
In formula, LPDiIndicate the resection of electric load at electric power networks interior joint i, LQDmIndicate heating power nodes m
Locate the resection of heating power load.
Further, the constraint condition of the optimal models includes electric system constraint condition, therrmodynamic system constraint condition
It is constrained with electro thermal coupling.
Further, the electric system constraint condition include electric system node active power and reactive power equilibrium about
Beam, electric system generator units limits, power system voltage constraint and circuit on power system trend constraint.
Further, the therrmodynamic system constraint condition includes therrmodynamic system node flow Constraints of Equilibrium, therrmodynamic system pipe
Road traffic constraints, the constraint of therrmodynamic system node pressure and electro thermal coupling constraint.
Further, described to judge whether the load resection is more than system loading resection threshold value, and be more than threshold
When value, issue warning signal specifically:
LPD* indicates that electric load cuts off total amount threshold value, LQD in electric system*Indicate that thermic load cuts off total amount in therrmodynamic system
Threshold value；
If meeting any formula of above formula under current elements failure, then issuing warning signal.
Second aspect of the present invention provides a kind of electric-thermal coupled system fault pre-alarming device, and described device is separately connected electricity-
Thermal coupling system and scheduling institution.
Further, described device includes:
Data acquisition unit determines the initial operating state of system for obtaining the data of electric-thermal coupled system element；
Fault simulation computing unit, is used for analog element failure, and the data of more new system are determined current using optimal models
Failure load resection caused by system；
As a result unit is prejudged, judges whether the load resection is more than system loading resection threshold value；
Communication unit sends pre-warning signal to scheduling institution when being more than threshold value.
The effect provided in summary of the invention is only the effect of embodiment, rather than invents all whole effects, above-mentioned
A technical solution in technical solution have the following advantages that or the utility model has the advantages that
1, by obtaining the operation data of power grid and heat supply network in electric-thermal coupled system, power grid and the current fortune of heat supply network are specified
Row state is estimated in power grid or heat supply network after any element failure on the basis of current operating conditions to electric-thermal coupled system
The influence that may cause, and then provide pre-warning signal.It can after element fault to assist scheduling institution to formulate countermeasure
Contingency plan is formulated in influence caused by energy, for guaranteeing that the safe and reliable operation of coupled system is of great significance.
2, after simulating a certain element fault, by the minimum value of power system load resection and therrmodynamic system load resection
As objective function, under constraint condition, the load resection of system under current elements failure is calculated, and by the load resection
It is compared with load resection threshold value in system, influence of the current elements failure to system is judged with this, it is accurate, effective
Carrying out failure influences anticipation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without creative efforts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is electric-thermal coupled system structural schematic diagram in the prior art；
Fig. 2 is the flow diagram of the method for the invention embodiment；
Fig. 3 is the structural schematic diagram of Installation practice of the present invention.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.Following disclosure provides many different embodiments or example is used to realize different knots of the invention
Structure.In order to simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.In addition, the present invention can be with
Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated
Relationship between various embodiments and/or setting is discussed.It should be noted that illustrated component is not necessarily to scale in the accompanying drawings
It draws.Present invention omits the descriptions to known assemblies and treatment technology and process to avoid the present invention is unnecessarily limiting.
As shown in Fig. 2, electric-thermal coupled system fault early warning method of the invention, comprising the following steps:
S1 obtains the data of electric-thermal coupled system element, determines the initial operating state of system；
S2, successively simulates element fault in electro thermal coupling system, and the data of more new system are determined current using optimal models
Failure load resection caused by system；
S3 judges whether the load resection is more than system loading resection threshold value, and when being more than threshold value, issues pre-
Alert signal.
It in step S1, is acquired by the sensor in power network and heat supply network, obtains the number of electric-thermal coupled system element
According to the initial operating state of electric-thermal coupled system being determined, including electric system: the maximum of the output power of generator, generator
The electrical power etc. flowed through on power, node voltage, electric load and route；Therrmodynamic system: node thermic load, the input temperature of node
Degree and output temperature, environment temperature etc.；Heat pump: the electrical power of consumption, the thermal power of generation and electric heating ratio.
In step S2, based on the initial operating state of the system determined in step S1, successively simulate in electric-thermal coupled system
The failure of element, such as heat pump, generator, route, by taking generator, heat pump failure as an example, after generator failure, maximum power
0 is fallen to from initial state value；Heat pump failure can prevent heat pump from converting electrical energy into heat again, i.e. electric heating ratio is from original state
Value falls to 0.After element fault, the data of electric-thermal coupled system are updated, determine that the failure makes system with optimal models
At load resection.
The objective function of the optimal models is expressed as post-fault system loss reduction:
(1) in formula, LPDiIndicate the resection of electric load at electric power networks interior joint i, LQDmIt indicates to save in heating power network
The resection of heating power load at point m.
Constraint condition includes electric system constraint, therrmodynamic system constraint and electro thermal coupling constraint.
Electric system constraint are as follows:
A) electric system node active power, reactive power equilibrium constraint
(2) in (3) formula, PGiAnd QGiRespectively indicate the active power of generator and idle function at electric power networks interior joint i
Rate, PDiAnd QDiRespectively indicate the burden with power and load or burden without work at electric power networks interior joint i, PEBiIt is consumed for heat pump at node i
Electrical power, ViAnd VjIndicate the voltage at node i and node j, GijAnd BijConductance and electricity respectively between node i and node j
It receives；I and j indicates two endpoints of route.
B) electric system generator units limits
(4) in (5) formula,WithThe lower and upper limit of the active power of generator at node i are respectively indicated,WithRespectively indicate the lower and upper limit of the reactive power of generator at node i.
C) power system voltage constrains
(6) in formula,WithRespectively indicate the lower and upper limit of generator voltage at node i.
D) circuit on power system trend constraint
Pij=ViVj(Gijcosθij+Bij sinθij)-Vi 2Gij (7)
(7) in (8) formula, PijWithRespectively indicate electrical power and the upper limit of the power that route between node i and node j flows through.
Therrmodynamic system constraint are as follows:
E) therrmodynamic system node flow Constraints of Equilibrium
(9)-(13) in formula, LmIndicate the water requirement of load at node m, CpIndicate the specific heat capacity of water, φmIndicate heating power system
Thermic load at system interior joint m, φEBmFor the thermal power of the heat pump at the therrmodynamic system node m that is connected with electric system node i,
TsmAnd TrmThe input temp and output temperature of load, T at respectively node msnAnd TrnThe input temperature of load at respectively node n
Degree and output temperature, τmTo fill the water total amount, τ at node mmnThe water flow of pipeline, h between node m and node nmAnd hnIt is respectively hot
Pressure at Force system interior joint m and node n, KmnThe impedance factor of pipeline, T between therrmodynamic system interior joint m and node neFor
Extraneous natural temperature, λ are the transfer impedance of pipeline, dmnFor the duct length between node m and node n；M, n respectively indicates pipeline
The node at both ends.
F) therrmodynamic system pipeline flow constrains
(14) in formula,WithRespectively indicate the lower and upper limit of the pipeline water flow amount between node m and node n.
G) therrmodynamic system node pressure constrains
(15) in formula,WithRespectively indicate the lower and upper limit of pressure at node m.
Electroheat pair contract beam:
(16) in formula, Z is indicated and the electric heating ratio for the heat pump being connected at electric system node i and therrmodynamic system node m.
In step S3, according to the load resection of electric-thermal coupled system under the simulated failure acquired in step S2, under
Formula judges whether that the safe operation of system can be impacted:
(17) in (18) formula, LPD*Indicate that electric load cuts off total amount threshold value, LQD in electric system*Indicate heat in therrmodynamic system
Load cuts off total amount threshold value.
If the total resection of obtained electric load or the total resection of heating power load are greater than threshold value, i.e., full under some failure
Sufficient formula (17) or (18), then it is assumed that the failure will affect the safe operation of electric-thermal coupled system, at this time send out the fault condition
System regulation mechanism is given, provides pre-warning signal to regulating and controlling mechanism.Regulating and controlling mechanism can propose contingency plan for the failure, avoid
After actually there is original text failure, heavy losses are caused.
As shown in figure 3, the electric-thermal coupled system fault pre-alarming device of the embodiment of the present invention is separately connected electric-thermal coupled systemes
System and scheduling institution.Device includes data acquisition unit, fault simulation unit, result anticipation unit and communication unit.Data are adopted
Collection unit is used to obtain the data of electric-thermal coupled system element, determines the initial operating state of system；Fault simulation computing unit
For analog element failure, the data of more new system determine that current failure load caused by system is cut off using optimal models
Amount；As a result unit is prejudged, judges whether the load resection is more than system loading resection threshold value；Communication unit is being more than
When threshold value, pre-warning signal is sent to scheduling institution.
The above is the preferred embodiment of the present invention, for those skilled in the art,
Without departing from the principles of the invention, several improvements and modifications can also be made, these improvements and modifications are also regarded as this hair
Bright protection scope.
Claims (9)
1. a kind of electric-thermal coupled system fault early warning method, characterized in that the following steps are included:
The data for obtaining electric-thermal coupled system element, determine the initial operating state of system；
Element fault in electro thermal coupling system is successively simulated, the data of more new system determine current failure pair using optimal models
Load resection caused by system；
Judge whether the load resection is more than system loading resection threshold value, and when being more than threshold value, issues warning signal.
2. a kind of electric-thermal coupled system fault early warning method according to claim 1, characterized in that at the beginning of the system
Beginning operating status includes that the output power of generator, the maximum power of generator, node voltage, route electrical power, node heat are negative
Electrical power, the thermal power of generation and the electric heating ratio that lotus, the input temp of node and output temperature, environment temperature, heat pump consume.
3. a kind of electric-thermal coupled system fault early warning method according to claim 1, characterized in that the optimal models
Objective function are as follows:
In formula, LPDiIndicate the resection of electric load at electric power networks interior joint i, LQDmIndicate heat at heating power nodes m
The resection of power load.
4. a kind of electric-thermal coupled system fault early warning method according to claim 3, characterized in that the optimal models
Constraint condition include electric system constraint condition, therrmodynamic system constraint condition and electro thermal coupling constraint.
5. a kind of electric-thermal coupled system fault early warning method according to claim 4, characterized in that the electric system
Constraint condition includes electric system node active power and reactive power equilibrium constraint, electric system generator units limits, electricity
The constraint of Force system voltage and circuit on power system trend constraint.
6. a kind of electric-thermal coupled system fault early warning method according to claim 4, characterized in that the therrmodynamic system
Constraint condition include therrmodynamic system node flow Constraints of Equilibrium, therrmodynamic system pipeline flow constraint, therrmodynamic system node pressure about
Beam and electro thermal coupling constraint.
7. a kind of electric-thermal coupled system fault early warning method according to claim 4, characterized in that described in the judgement
Whether load resection is more than system loading resection threshold value, and when being more than threshold value, is issued warning signal specifically:
LPD*Indicate that electric load cuts off total amount threshold value, LQD in electric system*Indicate that thermic load cuts off total amount threshold value in therrmodynamic system；
If meeting any formula of above formula under current elements failure, then issuing warning signal.
8. a kind of electric-thermal coupled system fault pre-alarming device, described device includes the described in any item methods of claim 1-7,
It is characterized in that described device is separately connected electric-thermal coupled system and scheduling institution.
9. a kind of electric-thermal coupled system fault pre-alarming device according to claim 8, characterized in that described device includes:
Data acquisition unit determines the initial operating state of system for obtaining the data of electric-thermal coupled system element；
Fault simulation computing unit, is used for analog element failure, and the data of more new system determine current failure using optimal models
The load resection caused by system；
As a result unit is prejudged, judges whether the load resection is more than system loading resection threshold value；
Communication unit sends pre-warning signal to scheduling institution when being more than threshold value.
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| CN108347052A (en) * | 2018-02-07 | 2018-07-31 | 广州供电局有限公司 | A kind of trouble-saving and control method of electric-thermal coupling multipotency streaming system |
| CN108446865A (en) * | 2018-04-17 | 2018-08-24 | 北京清大高科系统控制有限公司 | Thermo-electrically based on interval method couples multipotency streaming system power methods of risk assessment |
| CN109031952A (en) * | 2018-07-18 | 2018-12-18 | 河海大学 | A kind of electric-gas interconnection integrated energy system mixing control method |
| CN109510196A (en) * | 2018-11-28 | 2019-03-22 | 燕山大学 | A kind of fault recovery betting model based on electric-gas coupled system |
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- 2019-03-28 CN CN201910242316.4A patent/CN109991494B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4438342A (en) * | 1980-05-15 | 1984-03-20 | Kenyon Keith E | Novel hybrid electric vehicle |
| CN108347052A (en) * | 2018-02-07 | 2018-07-31 | 广州供电局有限公司 | A kind of trouble-saving and control method of electric-thermal coupling multipotency streaming system |
| CN108446865A (en) * | 2018-04-17 | 2018-08-24 | 北京清大高科系统控制有限公司 | Thermo-electrically based on interval method couples multipotency streaming system power methods of risk assessment |
| CN109031952A (en) * | 2018-07-18 | 2018-12-18 | 河海大学 | A kind of electric-gas interconnection integrated energy system mixing control method |
| CN109510196A (en) * | 2018-11-28 | 2019-03-22 | 燕山大学 | A kind of fault recovery betting model based on electric-gas coupled system |
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