CN106849008B - Cogeneration units protect controller - Google Patents
Cogeneration units protect controller Download PDFInfo
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- CN106849008B CN106849008B CN201710103794.8A CN201710103794A CN106849008B CN 106849008 B CN106849008 B CN 106849008B CN 201710103794 A CN201710103794 A CN 201710103794A CN 106849008 B CN106849008 B CN 106849008B
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- cogeneration units
- default
- generator
- failure
- engine
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention discloses a kind of cogeneration units protection controller, is related to cogeneration of heat and power technical field, for improving the operation stability and safety in operation of cogeneration units.The cogeneration units protection controller includes: the first data acquisition unit, the second data acquisition unit, third data acquisition unit and central control unit；Wherein, the first data acquisition unit is used to acquire the power supply parameter of generator；Second data acquisition unit is used to acquire the operating parameter of engine；Third data acquisition unit is used to acquire the heating parameter of heat circulating system；Central control unit determines the fault level and fault message of cogeneration units according to the heating parameter and default heating parameter of the power supply parameter and default power supply parameter of generator, the operating parameter of engine and default operational factor and heat circulating system；Central control unit is also used to generate corresponding protection control instruction according to fault level, carries out protection control to cogeneration units.
Description
Technical field
The present invention relates to cogeneration of heat and power technical fields more particularly to a kind of cogeneration units to protect controller.
Background technique
Cogeneration of heat and power (Combined Heat And Power, CHP) unit is one kind from same fuel while generating electricity
There can be the thermal efficiency that is energy saving, improving fuel with the unit of thermal energy, reduce exhaust gas discharge, thus by people
Widely pay close attention to.
Currently, cogeneration units generally include engine and motor, the chemical energy of fuel is converted to machine by engine
Tool energy and thermal energy, generator convert mechanical energy into electric energy under the drive of engine, and engine is produced using the chemical energy of fuel
Raw thermal energy is passed through in heat circulating system, provides thermal energy, the electricity that generator generates under the drive of engine for heat circulating system
Power supply then can be completed to electrical equipment, wherein cogeneration units independently can complete power supply (i.e. to electrical equipment
Cogeneration units operate in isolated network state), cogeneration units can also complete electric power to electrical equipment together with power grid and supply
Answer (i.e. cogeneration units operate in grid connection state).
Cogeneration units at runtime, the confession of the operating parameter of engine, the power supply parameter of generator, heat circulating system
When thermal parameter etc. is abnormal, it will usually influence the operation stability of cogeneration units, or even will affect cogeneration units
Safety in operation, therefore, it is necessary to a kind of cogeneration units protection controller be provided, to protect to cogeneration units
Shield,
Summary of the invention
The purpose of the present invention is to provide a kind of cogeneration units to protect controller, for improving cogeneration units
Operation stability and safety in operation.
To achieve the goals above, the invention provides the following technical scheme:
The present invention provides a kind of cogeneration units protection controller, including the first data acquisition unit, the second data are adopted
Collect unit, third data acquisition unit and central control unit；Wherein, first data acquisition unit and cogeneration units
In generator connection, first data acquisition unit is used to acquire the power supply parameter of the generator；Second data
Acquisition unit is connect with the engine in the cogeneration units, and second data acquisition unit is for acquiring described start
The operating parameter of machine；The third data acquisition unit is connect with the heat circulating system of the cogeneration units, the third
Data acquisition unit is used to acquire the heating parameter of the heat circulating system；The central control unit is counted with described first respectively
It is connected according to acquisition unit, second data acquisition unit with the third data acquisition unit；The central control unit root
According to the power supply parameter and default power supply parameter of the generator, the operating parameter of the engine and default operational factor and institute
The heating parameter and default heating parameter for stating heat circulating system determine the fault level and failure letter of the cogeneration units
Breath；The central control unit is also used to generate corresponding protection control instruction according to the fault level, joins to the thermoelectricity
It produces unit and carries out protection control.
In cogeneration units protection controller provided by the invention, generator is acquired by the first data acquisition unit
Power supply parameter acquires the operating parameter of engine by the second data acquisition unit, acquires heat by third data acquisition unit
The heating parameter of the circulatory system, by central control unit by the default power supply parameter of the power supply parameter of generator and generator into
Row compares, and the operating parameter of engine is compared with the default operational factor of engine, by heat circulating system for physochlaina infudibularis
Number be compared with the default heating parameter of heat circulating system, with determine whether there is abnormal power supply parameter, operating parameter or/
And heating parameter, when central control unit, which judges to determine, there is abnormal power supply parameter, operating parameter or/and heating parameter,
I.e. cogeneration units break down at this time, and central control unit is then according to abnormal power supply parameter, operating parameter or/and heat supply
Parameter determines the fault level and fault message of cogeneration units, and generates corresponding protection control according to fault level and refer to
It enables, protection control is carried out to cogeneration units, so that cogeneration units is made corresponding reaction and movement for failure, with right
Cogeneration units are protected, and prevent the presence of failure from influencing the operation stability and safety in operation of cogeneration units,
So as to improve the operation stability and safety in operation of cogeneration units.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram that cogeneration units provided in an embodiment of the present invention protect controller.
Fig. 2 is to protect controller to protect showing for cogeneration units using cogeneration units provided in an embodiment of the present invention
It is intended to.
Appended drawing reference:
1- central control unit, the first data acquisition unit of 2-,
The second data acquisition unit of 3-, 4- third data acquisition unit,
The 4th data acquisition unit of 5-, the 5th data acquisition unit of 6-,
The 6th data acquisition unit of 7-, 8- alarm unit,
9- display unit, 9a- selection key,
10- deposit unit, 11- information communication unit,
12- power supply unit, 13- generator,
14- power grid.
Specific embodiment
The cogeneration units that embodiment provides in order to further illustrate the present invention protect controller, below with reference to specification
Attached drawing is described in detail.
Fig. 1 and Fig. 2 are please referred to, cogeneration units protection controller provided in an embodiment of the present invention includes that the first data are adopted
Collect unit 2, the second data acquisition unit 3, third data acquisition unit 4 and central control unit 1；Wherein, the first data acquire
Unit 2 is connect with the generator 13 in cogeneration units, and the first data acquisition unit 2 is used to acquire the power supply ginseng of generator 13
Number；Second data acquisition unit 3 is connect with the engine in cogeneration units, and the second data acquisition unit 3 is for acquiring hair
The operating parameter of motivation；Third data acquisition unit 4 is connect with the heat circulating system of cogeneration units, and the acquisition of third data is single
Member 4 is for acquiring the heating parameter of heat circulating system.
Central control unit 1 is acquired with the first data acquisition unit 2, the second data acquisition unit 3 and third data respectively
Unit 4 connects；Central control unit 1 is according to the power supply parameter of generator 13 and the operating parameter of default power supply parameter, engine
With the heating parameter and default heating parameter of default operational factor and heat circulating system, the failure etc. of cogeneration units is determined
Grade and fault message；Central control unit 1 is also used to generate corresponding protection control instruction according to fault level, to cogeneration of heat and power
Unit carries out protection control.
When it is implemented, the power supply parameter of the first data acquisition unit 2 acquisition generator 13 can be first passed through, pass through second
Data acquisition unit 3 acquires the operating parameter of engine, by the acquisition heat circulating system of third data acquisition unit 4 for physochlaina infudibularis
The power supply parameter of generator 13, is then compared by number by central control unit 1 with the default power supply parameter of generator 13,
The operating parameter of engine is compared with the default operational factor of engine, the heating parameter of heat circulating system is followed with heat
The default heating parameter of loop system is compared, to determine whether there is abnormal power supply parameter, operating parameter or/and for physochlaina infudibularis
Number is when central control unit 1, which judges to determine, there is abnormal power supply parameter, operating parameter or/and heating parameter, i.e., warm at this time
Electricity Federation produces unit and breaks down, and central control unit 1 is then according to abnormal power supply parameter, operating parameter or/and heating parameter, really
Determine the fault level and fault message of cogeneration units, and corresponding protection control instruction is generated according to fault level, to heat
Electricity Federation produces unit and carries out protection control, so that cogeneration units is made corresponding reaction and movement for failure, to join to thermoelectricity
It produces unit to be protected, prevents the presence of failure from influencing the operation stability and safety in operation of cogeneration units, to change
It has been apt to the operation stability and safety in operation of cogeneration units.
In addition, central control unit 1 judges really in cogeneration units provided in an embodiment of the present invention protection controller
When the fixed power supply parameter that there is exception, operating parameter or/and heating parameter, central control unit 1 is then joined according to abnormal power supply
Number, operating parameter or/and heating parameter, determine the fault level of cogeneration units, i.e., by the abnormal conditions of different parameters with
And the intensity of anomaly of each parameter incorporates into as different fault levels, the then corresponding protection control of grade generation according to different faults
Instruction protects control instruction to realize just to judge and generate when slight abnormality occurs in parameter accordingly, rather than in parameter
Occur that corresponding protection control instruction is just judged and generated when severely subnormal, thus may be implemented to occur in parameter slight different
Just cogeneration units are protected when often, to further improve the operation stability and operation peace of cogeneration units
Quan Xing.
Furthermore it in cogeneration units provided in an embodiment of the present invention protection controller, is acquired by the first data single
Member 2 acquires the power supply parameter of generator 13, and the operating parameter of engine is acquired by the second data acquisition unit 3, passes through third
Data acquisition unit 4 acquires the heating parameter of heat circulating system, may be implemented to be monitored the operation of cogeneration units, from
And the operational reliability of cogeneration units can be improved.
In above-described embodiment, used fuel can be solid fuel when cogeneration units are run, such as coal etc.,
Used fuel is also possible to liquid fuel, such as gasoline, kerosene etc., cogeneration units fortune when cogeneration units operation
Used fuel can also be gaseous fuel, i.e. combustion gas, such as coal bed gas, natural gas, biogas etc. when row.Implement in the present invention
In example, used fuel is combustion gas when cogeneration units are run, please continue to refer to Fig. 1, heat provided in an embodiment of the present invention
It further includes the 4th data acquisition unit 5, the 4th data acquisition unit 5 and central control unit 1 that Electricity Federation, which produces generator protection controller,
Connection, the 4th data acquisition unit 5 are used to acquire the combustion gas information of cogeneration units.It is adopted by the 4th data acquisition unit 5
Collect the combustion gas information of cogeneration units, to obtain parameter relevant to combustion gas and cogeneration units in cogeneration units
Whether the information of gas leakage is had, and central control unit 1 then can determine that thermoelectricity joins according to the combustion gas information of cogeneration units
The fault level and fault message of unit are produced, and corresponding protection control instruction, protection control thermoelectricity are generated according to fault level
Coproduction unit to further protect cogeneration units, and then improves the operation stability of cogeneration units, operational safety
Property and operational reliability, while can also realize and comprehensively cogeneration units are protected.
Central control unit 1 according to the power supply parameter of generator 13 and default power supply parameter, engine operating parameter and
The combustion gas information of default operational factor, the heating parameter of heat circulating system and default heating parameter and cogeneration units determines
When the fault level of cogeneration units, the fault levels of cogeneration units can be according to actually being set, for example, can be with
The fault level of cogeneration units is divided into three-level, can specifically include level fault, secondary failure and three-level fault,
In, level fault is more serious than secondary failure, and secondary failure is more serious than three-level fault.
Central control unit 1 according to the power supply parameter of generator 13 and default power supply parameter, engine operating parameter and
The combustion gas information of default operational factor, the heating parameter of heat circulating system and default heating parameter and cogeneration units determines
After the fault level of cogeneration units, central control unit 1 generates corresponding protection control instruction, to cogeneration units into
When row protection control, the control instruction that central control unit 1 generates can be set according to the severity of fault level.
For example, when cogeneration units operate in grid connection state, when central control unit 1 determines that fault level is level-one event
When barrier, at this point, the failure of cogeneration units is catastrophe failure, cogeneration units may be badly damaged or even be scrapped, or
Person, which may threaten personal safety, such as cause casualties, and central control unit 1, which then can be generated, makes engine
Gas supply valve close protection control instruction and disconnect the grid-connected breaker of cogeneration units protection control refer to
It enables, the gas supply valve of engine is obtaining the guarantor of the gas supply valve closing generated for making engine of central control unit 1
After protecting control instruction, the gas supply valve of engine is then closed, and engine is shut down, and cogeneration units are shut down, grid-connected breaker
After obtaining the protection control instruction generated for disconnecting grid-connected breaker of central control unit 1, grid-connected breaker is disconnected, heat
Electricity Federation produces unit and power grid 14 disconnects, to prevent the catastrophe failure of cogeneration units from causing the badly damaged of cogeneration units
Even scrap.
When cogeneration units operate in grid connection state, when central control unit 1 determines that fault level is secondary failure,
At this point, the failure of cogeneration units is medium outage, cogeneration units be may be damaged, and central control unit 1 then can be with
The load for generating the protection control instruction, generator 13 that make 13 off-load of generator, which is less than or equal to when presetting load, makes grid-connected open circuit
The protection control instruction of device disconnection and being supported on for generator 13 are less than or equal under default load after maintenance third preset time
The protection control instruction for shutting down engine.Specifically, when central control unit 1 determines that fault level is secondary failure, in
Centre control unit 1 generates corresponding protection control instruction, and central control unit 1 is generated to make generator to generator 13 obtaining
After the protection control instruction of 13 off-loads, the load of generator 13 is then gradually lowered by initial load；When the load of generator 13 is dropped
When down to default load or being reduced to default load following, grid-connected breaker is disconnected, and cogeneration units and power grid 14 disconnect；When
The load reduction of generator 13 to default load or be reduced to default load hereinafter, and after maintaining third preset time, engine
After obtaining the protection control instruction generated for shutting down engine of central control unit 1, engine is shut down, cogeneration of heat and power machine
Group is shut down.It is designed in this way, when the failure of cogeneration units is not up to catastrophe failure, makes the gradually off-load of generator 13, generate electricity
The load reduction of machine 13 to a certain extent and keeps after a certain period of time, then shutting down cogeneration units, making cogeneration units
Carry out off-load shutdown, that is, shut down cogeneration units gradually, and it is optional shut down cogeneration units suddenly, convenient for heat
Electricity Federation produces the heat dissipation of unit, while can also reduce impact when cogeneration of heat and power is shut down to load.
When cogeneration units operate in grid connection state, when central control unit 1 determines that fault level is three-level fault,
At this point, the failure of cogeneration units is low failure, cogeneration units run under the failure and may not damage, center
The protection control instruction for making cogeneration units keep current state operation, cogeneration units then can be generated in control unit 1
It continues to run, central control unit 1 is then acquired using the first data acquisition unit 2, the second data acquisition unit 3, third data
Unit 4 and the data collected of the 4th data acquisition unit 5, are monitored the operation of cogeneration units, cogeneration of heat and power machine
After the failure of group becomes serious, it is immediately generated corresponding protection control instruction, to protect to cogeneration units.
In above-described embodiment, central control unit 1 determines the fault level of cogeneration units, and according to cogeneration of heat and power machine
After the fault level of group generates corresponding protection control instruction, the needs of central control unit 1 will protect control instruction to send out accordingly
Out, to carry out corresponding protection control to cogeneration units, central control unit 1 will protect control instruction to issue accordingly
When, it can be by wired or wireless mode, it in embodiments of the present invention, can be in the following way: please continue to refer to Fig. 2,
Faulty separating brake relay, level fault relay, secondary failure relay and three-level fault relay is arranged in cogeneration units
Device, cogeneration units protection controller provided in an embodiment of the present invention have multiple pins, wherein pinRespectively in
Centre control unit 1 is connected with failure separating brake relay, pinConnect respectively with central control unit 1 and level fault relay
It connects, pinIt is connect respectively with central control unit 1 and secondary failure relay, pinRespectively with central control unit 1 and
The connection of three-level fault relay；When central control unit 1 determines that the failure of cogeneration units is level fault, then center control
Unit 1 processed issues corresponding protection control instruction to failure separating brake relay and level fault relay, keeps grid-connected breaker disconnected
It opens, closes gas supply valve；It is when central control unit 1 determines that the failure of cogeneration units is secondary failure, then central
Control unit 1 issues corresponding protection control instruction to failure separating brake relay and level fault relay, subtracts generator 13
It carries, makes the disconnection when the load of generator 13 is less than or equal to default load of grid-connected breaker, make engine in generator 13
Load is shut down after maintaining third preset time less than or equal to default load is lower；, when central control unit 1 determines thermoelectricity connection
When the failure for producing unit is three-level fault, central control unit 1 then issues corresponding protection control to three-level fault relay and refers to
It enables, cogeneration units is made to keep current state operation.
In above-described embodiment, level fault, secondary failure and three-level fault specific classification can be according to actually being divided
Class, for example, in embodiments of the present invention, level fault may include gas leakage failure, level-one power supply trouble and isolated operation
At least one of failure；Secondary failure includes in second level power supply trouble, two stage motor operation troubles and second level fault of heat supply
At least one；Three-level fault includes three stage motor operation troubles or/and three-level fault of heat supply.
Wherein, the power supply parameter of generator 13 may include the voltage, electric current and frequency of generator 13；Generator 13 it is pre-
If power supply parameter includes predeterminated voltage, the first predetermined current, the second predetermined current and the default inverse probability of the generator 13,
In, the first predetermined current is less than the second predetermined current.Specifically, please continue to refer to Fig. 2, thermoelectricity connection provided in an embodiment of the present invention
Producing generator protection controller has multiple pins, and pin is 4., 5. 6. the first data acquisition unit 2 connects pin respectively with pin,
Pin 4., pin 5. 6. also connect respectively with generator 13 with pin, i.e. the first data acquisition unit 2 by pin 4., pin
5., pin 6. connect with generator 13, to acquire the voltage and frequency of generator 13；Pin 7., pin 8., pin 9. and pin
10. connect respectively with the first data acquisition unit 2, pin 7., pin 8., pin 9. with pin 10. also respectively and pass through generator
The current transformer of 13 outlet is correspondingly connected with, the first data acquisition unit 2 also by pin 7., pin 8., pin 9., pin
10. being connect with generator 13, to acquire the electric current of generator 13.
The operating parameter of engine may include engine oil pressure, oil temperature, coolant pressure and the coolant liquid of engine
Temperature；The default operational factor of engine includes the default engine oil pressure of engine, the first default coolant temperature, second default
Coolant temperature, third preset coolant temperature, the first default coolant pressure and the second default coolant pressure, wherein the
For one coolant temperature less than the second default coolant temperature, third presets coolant temperature less than the first coolant temperature, and first
Coolant pressure is preset less than the second default coolant pressure.Specifically, please continue to refer to Fig. 2, the embodiment of the present invention provides heat
Electricity Federation, which produces generator protection controller, has multiple pins, wherein pinPinPinPinPinPinPinAnd pinIt is connect respectively with the sensor of setting on the engine, pinPinPinPinPinPinPinAnd pinAlso respectively with the second data acquisition unit
3 connections, the second data acquisition unit 3 is through pinAnd pinThe engine oil pressure of engine is acquired, the acquisition of the second data is single
Member 3 is through pinAnd pinThe oil temperature of engine is acquired, the second data acquisition unit 3 is through pinAnd pin
The coolant temperature of engine is acquired, the second data acquisition unit 3 is through pinAnd pinAcquire the coolant liquid of engine
Pressure.
The heating parameter of heat circulating system may include the pressure of supply water and supply water temperature of heat circulating system；Heat circulating system
Default heating parameter include that the first default supply water temperature, the second default supply water temperature, the first default pressure of supply water and second are pre-
If pressure of supply water, wherein the first default supply water temperature is greater than second less than the second default supply water temperature, the first default pressure of supply water
Default pressure of supply water.Specifically, please continue to refer to Fig. 2, the embodiment of the present invention, which provides cogeneration units protection controller, to be had
Multiple pins, wherein pinPinPinAnd pinIt connect, manages with third data acquisition unit 4 respectively
FootPinPinAnd pinIt is also connect respectively with heat circulating system, third data acquisition unit 4 is through pinAnd pinThe supply water temperature of heat circulating system is acquired, third data acquisition unit 4 is through pinAnd pinAcquisition heat
The pressure of supply water of the circulatory system.
The combustion gas information of cogeneration units may include the gas leakage information of cogeneration units.Specifically, please after
It is continuous to protect controller that there are multiple pins referring to Fig.2, the embodiment of the present invention provides cogeneration units, wherein pinAnd pipe
FootIt can be connect respectively with gas security, pinAnd pinAlso it is connect respectively with the 4th data acquisition unit 5,
To detect to the combustion gas in the environment where cogeneration units, the gas leakage information of cogeneration units is acquired, really
Cogeneration units are determined with the presence or absence of gas leakage.
Voltage, electric current and the frequency that generator 13 is acquired by the first data acquisition unit 2 are acquired single by the second data
Member 3 acquires engine oil pressure, oil temperature, coolant temperature and the coolant pressure of engine, passes through third data acquisition unit 4
The supply water temperature and pressure of supply water for acquiring heat circulating system acquire the combustion of cogeneration units by the 4th data acquisition unit 5
After gas leakage information, for the exception and intensity of anomaly of different parameters, it can set:
In level fault, level-one power supply trouble includes the voltage failure of generator 13, the power failure of generator 13, hair
At least one of primary current failure of motor 13.Wherein, the voltage failure of generator 13 is that the voltage of generator 13 is less than
Or it is greater than predeterminated voltage；The power failure of generator 13 are as follows: the power of generator 13 is inverse probability, and the power of generator 13 is small
In or equal to preset inverse probability, the power of generator 13 can be adopted by central control unit 1 according to the first data acquisition unit 2
The voltage and current of collection, which calculates, to be obtained；The primary current failure of generator 13 are as follows: the electric current of generator 13 is default greater than first
Electric current, less than keeping the second preset time in the range of the second predetermined current, alternatively, the electric current of generator 13 is greater than or equal to the
Two predetermined currents, wherein the electric current of generator 13 be located at greater than the first predetermined current, less than the second predetermined current in the range of
When, the electric current of generator 13 is corresponding with the second different preset times, and the electric current that can set generator 13 is bigger, and corresponding
Two preset times are then shorter, i.e., the electric current of generator 13 is located at greater than the first predetermined current, less than the range of the second predetermined current
When interior, the electric current of generator 13 has inverse time-delay operation feature.In level fault, gas leakage failure is gas leakage information
The failure that display combustion gas leaks.In level fault, isolated operation failure is that cogeneration units are in isolated operation shape
Failure when state, wherein the power swing state, voltage fluctuation state and frequency fluctuation state of cogeneration units can be passed through
To judge whether cogeneration units are in island operation state.
When central control unit 1 determines that the failure of cogeneration units includes the voltage failure of generator 13, generator 13
Primary current failure, power failure, gas leakage failure and the cogeneration units of generator 13 be in island operation state
At least one of failure when, then can determine that the fault level of cogeneration units is level fault.
In secondary failure, second level power supply trouble includes the secondary current failure of generator, the secondary current event of generator
Barrier are as follows: the electric current of generator be greater than the first predetermined current, less than the second predetermined current in the range of time for keeping less than the
Two preset times.In secondary failure, two stage motor operation troubles include the engine oil pressure of engine less than or equal to default
The failure of engine oil pressure, the coolant temperature of engine be greater than or equal to the failure of the second default coolant temperature, motivation it is cold
But hydraulic coupling is greater than or equal at least one of the failure of the second default coolant pressure.In secondary failure, second level heat supply
Failure includes the water supply that the supply water temperature of heat circulating system is greater than or equal to the failure, heat circulating system of the second default supply water temperature
Pressure is less than or equal at least one of the failure of the second default pressure of supply water.
When central control unit 1 determines that the failure of cogeneration units includes secondary current failure, the operation of two stage motors
When at least one of failure and second level fault of heat supply, then it can determine that the fault level of cogeneration units is secondary failure.
In three-level fault, three stage motor operation troubles include oil temperature abnormal failure, the engine of engine
Coolant temperature is greater than the first default coolant temperature and failure, the coolant liquid of engine less than the second default coolant temperature
Temperature is less than the failure of the default coolant temperature of third, the coolant pressure of engine is greater than the first default coolant pressure and small
In at least one of the failure of the second default coolant pressure.In three-level fault, three-level fault of heat supply includes thermal cycle system
The supply water temperature of system is greater than the water supply of the first default supply water temperature and failure, heat circulating system less than the second default supply water temperature
Pressure is less than the first default pressure of supply water and greater than at least one of the failure of the second default pressure of supply water.
When central control unit 1 determines that the failure of cogeneration units includes at least one in three stage motor operation troubles
When at least one of kind or/and three-level fault of heat supply, then it can determine that the fault level of cogeneration units is three-level fault.
In practical applications, the failure of cogeneration units includes but is not limited to above-mentioned failure, and point of different failures
Grade can also be set according to the actual situation, it is not limited here.
Please continue to refer to Fig. 1, cogeneration units protection controller provided in an embodiment of the present invention further includes alarm unit
8, alarm unit 8 is connect with central control unit 1, and central control unit 1 generates corresponding protection control according to fault level and refers to
While order, the alarm command for making alarm unit 8 alarm also is generated.Central control unit 1 determines the failure of cogeneration units
After grade, central control unit 1 also generates the report for making alarm unit 8 alarm while generating corresponding protection control instruction
Alert instruction, for alarm unit 8 after the alarm command for making alarm unit 8 alarm for receiving the generation of central control unit 1, alarm is single
Member 8 is then alarmed, to remind staff to overhaul in time to cogeneration units.
Please continue to refer to Fig. 1 and Fig. 2, cogeneration units protection controller provided in an embodiment of the present invention further includes the 5th
Data acquisition unit 6, the 5th data acquisition unit 6 are connect with power grid 14, and the 5th data acquisition unit 6 is for acquiring in power grid 14
Generator 13 and access point voltage and frequency；Central control unit 1 is also used to voltage and frequency according to generator 13, is incorporated to
The voltage and frequency of point, judge whether the voltage of generator 13 and frequency are all satisfied quasi- simultaneous interconnecting condition；Central control unit 1
It is also used to when the voltage and frequency of generator 13 are all satisfied quasi- simultaneous interconnecting condition, generating allows the grid-connected of cogeneration units
Breaker closing allows to instruct.
Specifically, please continue to refer to Fig. 2, the embodiment of the present invention, which provides cogeneration units protection controller, has multiple pipes
Foot, the first data acquisition unit 2 also through pin 4., pin the frequency of generator 13, the cogeneration of heat and power are 5. 6. acquired with pin
In multiple pins of generator protection controller, pin 1., pin 2. 3. connect respectively with the 5th data acquisition unit 6 with pin,
Pin 1., pin 2. 3. also connect respectively with power grid 14 with pin, i.e. the 5th data acquisition unit 6 by pin 1., pin 2.,
3. pin is connect with power grid 14, to acquire generator 13 in power grid 14 and access point voltage and frequency.
When needing for the generator 13 in cogeneration units to be connected to the grid in 14, cogeneration units and power grid 14 are common
When providing electric power for electrical equipment, it is connected to the grid before 14 in cogeneration units, the first data acquisition unit 2 acquires generator 13
Voltage and frequency, the 5th data acquisition unit 6 acquisition and access point voltage and frequency, central control unit 1 is according to generator
The voltage and frequency of 13 voltage and frequency and access point, judge whether the voltage of generator 13 and frequency are all satisfied the quasi- same period simultaneously
Whether net condition meets the voltage of generator 13 and simultaneously the difference between the voltage of access point is located within the scope of preset pressure, generates electricity
Difference between the frequency of the frequency of machine 13 and simultaneously access point is located within the scope of default frequency difference, when hair is learnt in the judgement of central control unit 1
The voltage and frequency of motor 13, which are all satisfied, turns simultaneous interconnecting condition, then central control unit 1, which generates, allows cogeneration units
Grid-connected breaker closing allows to instruct, when the grid-connected breaker of cogeneration units receives the generation of central control unit 1
The grid-connected breaker closing of permission cogeneration units allows to instruct, and receives the generation of cogeneration units master controller
After making the reclosing command of grid-connected breaker closing of cogeneration units, the grid-connected breaker closing of cogeneration units, thermoelectricity
The generator 13 of coproduction unit is connected to the grid in 14, and cogeneration units and power grid 14 provide electric power jointly for electrical equipment；When
Central control unit 1 judges that learning that the voltage of generator 13 or/and frequency meet turns simultaneous interconnecting condition, then central control unit
1 does not generate the grid-connected breaker closing of cogeneration units is allowed to allow to instruct, even if at this point, cogeneration units it is grid-connected
The combined floodgate for making the grid-connected breaker closing of cogeneration units that breaker receives the generation of cogeneration units master controller refers to
It enables, the grid-connected breaker of cogeneration units can not close a floodgate.
Cogeneration units provided in an embodiment of the present invention protect controller, judge generator by central control unit 1
Whether 13 voltage and frequency meets quasi- simultaneous interconnecting condition, to determine whether that generator 13 is connected to the grid 14, and only adopts
Controlled with cogeneration units master controller generator 13 and net operation compare, the operation of cogeneration units can be improved
Safety, operational reliability and operation stability, while also preventing cogeneration units master controller from losing because improper, protection is arranged
The reasons such as effect cause accidentally grid-connected.
Please continue to refer to Fig. 1 and Fig. 2, cogeneration units protection controller provided in an embodiment of the present invention further includes display
Unit 9, display unit 9 are connect with central control unit 1, and display unit 9 is used to show the power supply parameter of generator 13 and presets
Power supply parameter, the operating parameter of engine and default operational factor, the heating parameter of heat circulating system and default operational factor and
The combustion gas information of cogeneration units.The setting of display unit 9, staff can pass through picture shown by display unit 9
Determine that cogeneration units with the presence or absence of failure, and are assessed each parameter in cogeneration units, at the same time it can also
Staff is facilitated to set and modify the parameter preset of cogeneration units.
When display unit 9 shows each parameter of cogeneration units, it can be and show generator 13 in same picture
Power supply parameter and default power supply parameter, the operating parameter of engine and default operational factor, heat circulating system heating parameter and
The combustion gas information of default operational factor and cogeneration units, be also possible to a picture only show one of parameter and
Corresponding parameter preset, that is, only include one of parameter and corresponding parameter preset, example in a picture of display unit 9
Such as, the voltage and predeterminated voltage that generator 13 is only included in a picture of display unit 9, alternatively, one of display unit 9 is drawn
The electric current and the first predetermined current, the second predetermined current that generator 13 is only included in face, when needing to check other parameters and correspondence
Parameter preset when, please continue to refer to Fig. 2, selection key 9a can be set on display unit 9, selection key may include switching
Key can check other parameters and corresponding parameter preset by pressing switching key, wherein switching key may include
Left switching key, right switching key, upper switching key and lower switching key, left switching key and right switching key can be used to cut
The parameter of cogeneration units is changed, upper switching key and lower switching key can be used to switch the default ginseng of cogeneration units
Number, selection key 9a can also include determining key, determine that key can be used for selecting, return, exit.
Please continue to refer to Fig. 1, cogeneration units protection controller provided in an embodiment of the present invention further includes deposit unit
10, deposit unit 10 is connect with central control unit 1, and deposit unit 10 is for storing fault level and fault message；Thermoelectricity connection
After the engine shutdown for producing unit, the trouble shooting of cogeneration units and the fault level in deposit unit 10 and failure are believed
Before breath is removed, when starting engine, central control unit 1, which generates, forbids engine start to forbid instructing.Central control unit 1
According to each parameter and parameter preset of cogeneration units, the fault level and fault message of cogeneration units are determined, deposit
Unit 10 then stores fault level and fault message；The engine of cogeneration units is shut down, i.e., after cogeneration units are shut down,
When being again started up engine, that is, when being again started up cogeneration units, central control unit 1 then obtain in deposit unit 10 whether
Still it is stored with fault level and fault message, i.e. fault level in deposit unit 10 and fault message is not removed, also
Show that the failure of cogeneration units does not release, failure is still stored in cogeneration units, at this point, central control unit 1 is then
It generates and engine start is forbidden to forbid instructing, to protect to cogeneration units, prevent cogeneration units from existing
Allow in the case of failure, to further increase the safety in operation of cogeneration units, operation stability and reliable for operation
Property.
In embodiments of the present invention, please continue to refer to Fig. 1 and Fig. 2, the cogeneration units protection controller can be with
Including information communication unit 11, information communication unit 11 is connect with central control unit 1, and information communication unit 11 is for sending event
Hinder grade and fault message.Specifically, please continue to refer to Fig. 1 and Fig. 2, the cogeneration units protection controller has multiple
Pin, wherein pinPinAnd pinIt is connect respectively with information communication unit 11, pinPinWith
PinIt can also be connect with remote server or mobile terminal, pinPinAnd pinIt can be 485 communications
Interface, after central control unit 1 determines the fault level and fault message of cogeneration units, information communication unit 11 then will
Fault level and fault message are through pinPinAnd pinIt is sent to remote server or mobile terminal, to remind
Staff in time overhauls cogeneration units.The setting of information communication unit 11 can remind staff in time
Cogeneration units are overhauled, particularly with unattended cogeneration units, cogeneration units can be carried out
Protection prevents cogeneration units from shutting down or being run in the case of a fault depositing for a long time for a long time, to further increase thermoelectricity
Safety in operation, operation stability and the operational reliability of coproduction unit.
Please continue to refer to Fig. 1 and Fig. 2, cogeneration units protection controller provided in an embodiment of the present invention further includes acquisition
6th data acquisition unit 7 of the switching value data of cogeneration units, the 6th data acquisition unit 7 and central control unit 1
Connection.For example, cogeneration units protection controller provided in an embodiment of the present invention has multiple pins, wherein pinPinPinPinAnd pinIt is connect respectively with the 6th data acquisition unit 7, pinAlso and simultaneously
The connection of net breaker, pinIt is also connect with gas supply valve, pinIt is also connect with oil cock valve, pinAlso with it is cold
But liquid switch valve connects, pinIt is also connect with thermal cycle feed water valve, the 6th data acquisition unit 7 is through pinIt acquires grid-connected
The switching value data of breaker, the 6th data acquisition unit 7 is through pinThe switching value data of acquisition gas supply valve, the 6th
Data acquisition unit 7 is through pinThe switching value data of oil cock valve is acquired, the 6th data acquisition unit 7 is through pinIt adopts
Collect the switching value data of coolant liquid switch valve, the 6th data acquisition unit 7 is through pinAcquire the switching value of thermal cycle feed water valve
Data.It is noted that the switching value data of cogeneration units includes but is not limited to above-mentioned switching value data, for example, opening
It can also include engine oil level, anti-icing fluid liquid level etc. that data are measured in pass.
Cogeneration units protection controller provided by the above embodiment at work, can be directly by cogeneration units
Protection controller is connect with external power supply power supply, and external power supply power supply is directly each list in cogeneration units protection controller
Member power supply.In practical applications, it can also be protected in cogeneration units and power supply unit 12, power supply unit 12 are set in controller
Protect each unit power supply of controller after the electrical power conversion that external power supply power supply is provided for cogeneration units again, specifically,
Please continue to refer to Fig. 1 and Fig. 2, the cogeneration units protection controller further includes power supply unit 12, and power supply unit 12 is distinguished
With central control unit 1, the first data acquisition unit 2, the second data acquisition unit 3, the number of third data acquisition unit the 4, the 4th
It is logical according to acquisition unit 5, the 5th data acquisition unit 6, the 6th data acquisition unit 7, display unit 9, deposit unit 10 and information
Believe that unit 11 connects, power supply unit 12 is also connect with external power supply power supply, for example, pinAnd pinRespectively with power supply list
Member 12 connects, pinAnd pinIt is also connect respectively with external power supply power supply, i.e., power supply unit 12 passes through pinPipe
FootIt is connect with external power supply power supply, power supply unit 12 is the power supply of above-mentioned each unit.
In the description of above embodiment, particular features, structures, materials, or characteristics can be at any one or more
It can be combined in any suitable manner in a embodiment or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (12)
1. a kind of cogeneration units protect controller, which is characterized in that acquired including the first data acquisition unit, the second data
Unit, third data acquisition unit and central control unit；Wherein,
First data acquisition unit is connect with the generator in cogeneration units, and first data acquisition unit is used for
Acquire the power supply parameter of the generator；The power supply parameter of the generator includes the voltage, electric current and frequency of the generator；
The default power supply parameter of the generator include the predeterminated voltage of the generator, the first predetermined current, the second predetermined current and
Default inverse probability, wherein first predetermined current is less than second predetermined current；
Second data acquisition unit is connect with the engine in the cogeneration units, second data acquisition unit
For acquiring the operating parameter of the engine；The operating parameter of the engine includes the engine oil pressure of the engine, machine
Oil temperature, coolant pressure and coolant temperature；The default operational factor of the engine includes the default machine of the engine
Oil pressure, the first default coolant temperature, the second default coolant temperature, third preset coolant temperature, the first default cooling
Hydraulic coupling and the second default coolant pressure, wherein the first default coolant temperature is less than the described second default coolant liquid
Temperature, the third preset coolant temperature and are less than the described first default coolant temperature, the first default coolant pressure
Less than the described second default coolant pressure；
The third data acquisition unit is connect with the heat circulating system of the cogeneration units, and the third data acquisition is single
Member is for acquiring the heating parameter of the heat circulating system；The heating parameter of the heat circulating system includes the heat circulating system
Pressure of supply water and supply water temperature；The default heating parameter of the heat circulating system includes the first default supply water temperature, second pre-
If supply water temperature, the first default pressure of supply water and the second default pressure of supply water, wherein the first default supply water temperature is less than institute
The second default supply water temperature is stated, the first default pressure of supply water is greater than the second default pressure of supply water；
The central control unit respectively with first data acquisition unit, second data acquisition unit and the third
Data acquisition unit connection；The central control unit is according to the power supply parameter of the generator and default power supply parameter, described
The operating parameter and default operational factor of engine and the heating parameter of the heat circulating system and default heating parameter determine
The fault level and fault message of the cogeneration units；The central control unit is also used to raw according to the fault level
At corresponding protection control instruction, protection control is carried out to the cogeneration units.
2. cogeneration units according to claim 1 protect controller, which is characterized in that the fuel of the engine is
Combustion gas；Cogeneration units protection controller further includes the 4th data acquisition unit, the 4th data acquisition unit with
The central control unit connection, the 4th data acquisition unit are used to acquire the combustion gas information of the cogeneration units.
3. cogeneration units according to claim 2 protect controller, which is characterized in that the fault level includes one
Grade failure, secondary failure and three-level fault, wherein
The level fault includes at least one of gas leakage failure, level-one power supply trouble and isolated operation failure；
The secondary failure includes at least one in second level power supply trouble, two stage motor operation troubles and second level fault of heat supply
Kind；
The three-level fault includes three stage motor operation troubles or/and three-level fault of heat supply.
4. cogeneration units according to claim 3 protect controller, which is characterized in that
The combustion gas information of the cogeneration units includes the gas leakage information of the cogeneration units；
The gas leakage failure is the failure that the gas leakage information shows that combustion gas leaks；
The level-one power supply trouble includes the voltage failure of the generator, the power failure of the generator, the generator
At least one of primary current failure；Wherein, the voltage failure of the generator be the generator voltage be less than or
Greater than the failure of the predeterminated voltage；The level-one power failure of the generator are as follows: the power of the generator is inverse probability, and
The power of the generator is less than or equal to the default inverse probability；The primary current failure of the generator are as follows: the power generation
The electric current of machine be greater than first predetermined current, less than second predetermined current in the range of keep the second preset time,
Alternatively, the electric current of the generator is greater than or equal to second predetermined current；
The second level power supply trouble includes the secondary current failure of the generator, the secondary current failure of the generator are as follows:
The electric current of the generator be greater than first predetermined current, less than second predetermined current in the range of time for keeping
Less than second preset time；
The two stage motors operation troubles includes that the engine oil pressure of the engine is less than or equal to the default engine oil pressure
Failure, the coolant temperature of the engine be greater than or equal to the failure of the described second default coolant temperature, institute's engine
Coolant pressure be greater than or equal to the described second default coolant pressure at least one of failure；
The second level fault of heat supply includes that the supply water temperature of the heat circulating system is default more than or equal to described second for water temperature
The failure of degree, the heat circulating system pressure of supply water be less than or equal to the described second default pressure of supply water failure at least
It is a kind of；
The three stage motors operation troubles includes the coolant liquid of the oil temperature abnormal failure of the engine, the engine
Temperature is greater than the described first default coolant temperature and is less than the failure of the described second default coolant temperature, the engine
Coolant temperature is less than the third and presets the failure of coolant temperature, the coolant pressure of the engine greater than described first
Default coolant pressure and at least one of the failure for being less than the described second default coolant pressure；
The three-level fault of heat supply includes that the supply water temperature of the heat circulating system is greater than the described first default supply water temperature and small
It is less than the described first default pressure of supply water in the failure of the described second default supply water temperature, the pressure of supply water of the heat circulating system
And it is greater than at least one of the failure of the described second default pressure of supply water.
5. cogeneration units according to claim 3 protect controller, which is characterized in that
The fault level is the level fault, and the central control unit, which generates, makes the grid-connected disconnected of the cogeneration units
The protection control instruction of road device disconnection, the protection control instruction for closing the gas supply valve of the engine；
The fault level is the secondary failure, and the central control unit generation controls the protection of the generator off-load
Instruction, the load of the generator be less than or equal to the protection control instruction for disconnecting the grid-connected breaker when default load,
Being supported on for the generator is less than or equal to the lower guarantor for maintaining to shut down the engine after third preset time of default load
Protect control instruction；
The fault level is the three-level fault, and the central control unit generation makes the cogeneration units keep current
The protection control instruction of state operation.
6. cogeneration units according to claim 5 protect controller, which is characterized in that the cogeneration units are protected
Protecting controller further includes alarm unit, and the alarm unit is connect with the central control unit, the central control unit root
While generating corresponding protection control instruction according to the fault level, also generating refers to the alarm of the alarm unit alarm
It enables.
7. cogeneration units according to claim 4 protect controller, which is characterized in that the cogeneration units are protected
Protecting controller further includes the 5th data acquisition unit, and the 5th data acquisition unit is connect with power grid, and the 5th data are adopted
Collection unit is for acquiring generator described in power grid and access point voltage and frequency；
The central control unit is also used to voltage and frequency according to the generator, described and access point the voltage and frequency,
Judge whether the voltage of the generator and frequency are all satisfied quasi- simultaneous interconnecting condition；The central control unit is also used in institute
When the voltage and frequency for stating generator are all satisfied quasi- simultaneous interconnecting condition, the grid-connected open circuit for allowing the cogeneration units is generated
What device closed a floodgate allows to instruct.
8. cogeneration units according to claim 4 protect controller, which is characterized in that the cogeneration units are protected
Protecting controller further includes display unit, and the display unit is connect with the central control unit, and the display unit is for showing
Show the power supply parameter and default power supply parameter of the generator, the operating parameter of the engine and default operational factor, described
The heating parameter and default operational factor of heat circulating system and the combustion gas information of the cogeneration units.
9. cogeneration units according to claim 1 protect controller, which is characterized in that the cogeneration units are protected
Protecting controller further includes deposit unit, and the deposit unit is connect with the central control unit, and the deposit unit is for depositing
Store up the fault level and fault message；
After the engine of the cogeneration units is shut down, the trouble shooting of the cogeneration units and the deposit unit
Before interior fault level and fault message are removed, when starting the engine, the hair is forbidden in the central control unit generation
Motivation starting is forbidden instructing.
10. cogeneration units according to claim 1 protect controller, which is characterized in that the cogeneration units
Protecting controller further includes information communication unit, and the information communication unit is connect with the central control unit, the information
Communication unit is for sending the fault level and fault message.
11. cogeneration units according to claim 1 protect controller, which is characterized in that the cogeneration units
Protecting controller further includes the 6th data acquisition unit for acquiring the switching value data of the cogeneration units, the 6th number
It is connect according to acquisition unit with the central control unit.
12. cogeneration units according to claim 1 protect controller, which is characterized in that the cogeneration units
Protection controller further includes the power supply unit for power supply.
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| CN201710103794.8A CN106849008B (en) | 2017-02-24 | 2017-02-24 | Cogeneration units protect controller |
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| WO2014018909A1 (en) * | 2012-07-27 | 2014-01-30 | San Diego Gas & Electric Company | System for detecting a falling electric power conductor and related methods |
| CN103995514A (en) * | 2014-05-27 | 2014-08-20 | 中国轻工业南宁设计工程有限公司 | Combined heat and power generation PLC control system |
| CN204406139U (en) * | 2015-02-06 | 2015-06-17 | 刘恒宇 | Community Central heating monitoring system |
| CN106125649A (en) * | 2016-07-29 | 2016-11-16 | 任春雷 | HVAC machine room intelligent online fault detect method for early warning |
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| Title |
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| 基于PLC的锅炉供热控制系统的设计;王振;《中国学位论文全文库》;20080901;第17-46页 * |
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