CN111239485B - Self-power-consumption software metering method of wind generating set - Google Patents
Self-power-consumption software metering method of wind generating set Download PDFInfo
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- CN111239485B CN111239485B CN202010052483.5A CN202010052483A CN111239485B CN 111239485 B CN111239485 B CN 111239485B CN 202010052483 A CN202010052483 A CN 202010052483A CN 111239485 B CN111239485 B CN 111239485B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a self-power consumption software metering method of a wind generating set, which comprises the following steps: 1) measuring the voltage of the equipment power grid; 2) measuring current; 3) the equipment running state zone bit is a working zone bit; 4) the total self-consumption power of the unit equipment; 5) energy consumption of unit equipment; 6) self-power consumption test and calibration; 7) and (5) curing the parameters. The method can well replace the traditional hardware measurement mode, realizes the unit self-power consumption metering work through a software algorithm, optimizes the start-stop logic of the components through the state monitoring and the self-power consumption condition of each component, and reduces the unit self-power consumption.
Description
Technical Field
The invention relates to the technical field of wind generating sets, in particular to a self-power-consumption software metering method of a wind generating set.
Background
Currently, a wind generating set needs to use a hardware (a voltage sensor and a current transformer are connected into a power measuring module) mode to measure the generating capacity of the set so as to measure the total power consumption, but the self power consumption condition of each component of the set cannot be known. If the self-consumption of each component device is measured, a corresponding sensor needs to be added, the cost is very high, and the measurement is not easy to realize.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, provides a self-power consumption software metering method of a wind generating set, can well replace the traditional hardware measurement mode, realizes the self-power consumption metering work of the set through a software algorithm, optimizes the start-stop logic of components and reduces the self-power consumption of the set through monitoring the state and the self-power consumption condition of each component.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a self-power consumption software metering method of a wind generating set is characterized in that the wind generating set inevitably consumes a part of energy to meet the self-operation requirement in the normal operation process, the part of consumed energy is called the self-power consumption of the wind generating set, wherein the self-power consumption of the set mainly comes from the power consumption of motors, heaters, fans and a PLC module group; the self-power consumption software metering method comprises the following steps:
1) device grid voltage measurement
The method comprises the steps that a main control system of the wind generating set measures the voltage U of a power grid in real time, and the voltage conversion coefficient corresponding to each equipment voltage grade is multiplied by the voltage U, so that the actual voltage of the equipment can be obtained;
the voltage classes used by the equipment of the wind generating set are mainly divided into 690V, 400V and 230V, and each voltage conversion relation is as follows: 690V/1.732V-400V; 400V/1.732V/3;
if the voltage level of the ith device is 400V, the corresponding device voltage is UiU/1.732; if the voltage level of the ith device is 230V, the corresponding device voltage is Ui＝U/3；
2) Current measurement
Detecting the current value of each component in the unit during operation by using external current testing equipment, recording the current value of each component through multiple measurements, and obtaining the average current value I of each componentiI.e. the operating current of the ith device; the power supply of the PLC module group is 24V, the PLC module group is regarded as a device, and then the current value of the PLC module group under the corresponding power supply can be known by measuring the current at the power supply inlet side of the switching power supply supplying power to the PLC module group;
3) operating state bits, i.e. working bits
When the power grid is in a normal state, the protection switch of the equipment is in a closed state, and the contactor of the control equipment is in an attraction state, the equipment is in a normal working state, and the working flag bit k of the equipmentiSet to 1, otherwise, work flag bit kiIs 0, wherein kiRepresenting the working flag bit of the ith device;
4) total power consumption of a plant
Through steps 1) to 3), the real-time power supply voltage, the equipment running current value and the equipment running state of each equipment can be known, and the total self-consumption electric power of all the equipment of the unit is obtained through a physical formula (P is UI) and by combining the equipment running states
Wherein n is the total number of devices, PiIs the self-consumption power of the ith device;
5) energy consumption of unit equipment
Obtaining the total self power consumption of all equipment of the unit in the statistical period T by using the physical formula Q of energy consumption as Pt
In the formula, TjFor the (j) th period of the cycle,
m is the total of m periods T of the statistical period Tj；
6) Self-consuming test and calibration
Firstly, preparing a calibrated electric energy quality tester and installing the tester on a power supply line from a box transformer to unit equipment;
secondly, the electric energy quality tester and the unit perform clock timing operation to ensure clock synchronization;
then, when the unit runs, the main control recording and broadcasting software and the electric energy quality tester are started to respectively record the total consumed electric power of the unit at each moment;
comparing the hardware test energy consumption with the energy consumption calculated by the formula, and calculating a correction coefficient u;
finally, the calculation formula of the fixed self-power consumption Q is as follows:
7) parametric curing
The running current parameters and the correction coefficients u of each device are written into a program, relevant parameters can be seen on a human-computer interface, the self-power consumption of relevant components and the total self-power consumption value of the unit are transmitted to a main control system of the unit, the start-stop time of each component is optimized by combining the running state of the unit, the optimal start-stop logic of the unit is achieved, namely the start-stop logic of each component is optimized by monitoring the state of each component and the self-power consumption condition, and the self-power consumption of the unit is further reduced.
Further, the master control system is integrated with a voltage doubling module KL3403 or EL3413 and used for measuring the power grid voltage U in real time.
Further, the electric energy quality tester is Fluke 1760.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. high economic benefit
Aiming at the complete machine power consumption measurement of the wind generating set, a transmission hardware measurement mode can be replaced, 3 current transformer hardware costs and metering modules are saved for each set, the cost is about 10000 yuan, and the cost is about 33 ten thousand for one wind field according to 33 sets.
In addition, the voltage of each device can be obtained by multiplying the voltage grade conversion coefficient of the device by the voltage of the power grid, and each device does not need to be separately provided with a voltage sensor to measure.
2. Simple operation, easy popularization and high practicability
One unit only needs to spend half a day to complete the test and calibration. Even if the same wind field and the same model use the same set of parameters, the difference between the self-power consumption calculation value and the instrument measurement value is not large.
In addition, the power consumption condition of the components can be clearly recorded in real time on the premise of not using hardware, and the power consumption state of each component of the unit is clear; the self-power consumption is reduced by detecting the self-power consumption state of each component and optimizing the start-stop control logic; the traditional power consumption can only measure the total power consumption, and each part of each unit cannot be measured independently.
In a word, the software metering method is not limited to a double-fed type, a direct-drive type and a semi-direct-drive type, and the voltage measuring module applied to the metering method is not limited to the difference caused by the double-fed module KL3403 or EL3413 and the like, and is not limited to the difference caused by different devices used by the unit, so that the software metering method has wide application prospect and is worthy of popularization.
Detailed Description
The present invention will be further described with reference to the following specific examples.
In the normal operation process of the unit, a part of energy is inevitably consumed to meet the operation requirement of the unit, the operation requirement of the unit is ensured, the consumed energy is called as the self-consumption power of the wind generating set, and the self-consumption power of the unit mainly comes from the power consumption of motors, heaters, fans, PLC module sets and the like.
Under the condition of stable operation of the unit, the operation of each device also tends to be stable, the operating current in the working process is basically unchanged, and the main control system of the unit can monitor the voltage of a power grid and the working state of each device in real time, so that the self power consumption of each device can be counted by using an energy consumption calculation formula, and the total self power consumption of the unit can be calculated by summing.
The self-power-consumption software metering method of the wind generating set provided by the embodiment comprises the following steps:
1) device grid voltage measurement
The method comprises the steps of measuring the power grid voltage U (690V) in real time through a voltage multiplying module KL3403 or EL3413 of a main control system, and multiplying the power grid voltage U by a voltage conversion coefficient corresponding to each equipment voltage grade to obtain the actual voltage of the equipment.
The voltage classes used by the equipment of the wind generating set are mainly divided into 690V, 400V and 230V, and each voltage conversion relation is as follows: 690V/1.732V-400V; 400V/1.732V/3V/230V/690V/3V.
If the voltage level of the ith device is 400V, the corresponding device voltage is UiU/1.732; if the voltage level of the ith device is 230V, the corresponding device voltage is Ui＝U/3。
2) Current measurement
Detecting the current value of each component in the unit during operation by using external current test equipment, and recording the current value through multiple measurementsRecording the current value of each component to obtain the average current value I of each componentiI.e. the operating current of the ith device; the power supply of the PLC module group is 24V, the PLC module group can be regarded as one device, and then the current value of the PLC module group under the corresponding power supply can be known by measuring the current at the power supply inlet wire side of a switching power supply (400V to 24V) for supplying power to the PLC module group.
3) Operating state bits, i.e. working bits
When the power grid is in a normal state, the protection switch of the equipment is in a closed state, and the contactor of the control equipment is in an attraction state, the equipment is in a normal working state, and the working flag bit k of the equipmentiSet to 1, otherwise, work flag bit kiIs 0, wherein kiAnd the working flag bit (working is 1 and non-working is 0) of the ith device is represented.
4) Total power consumption of a plant
Through steps 1) to 3), the real-time power supply voltage, the equipment running current value and the equipment running state of each equipment can be known, and the total self-consumption electric power of all the equipment of the unit can be obtained through a physical formula P (UI) and combining the equipment running state
Wherein n is the total number of devices, PiIs the self-consuming power of the ith device.
5) Energy consumption of unit equipment
Through the physical formula Q of energy consumption being Pt, the total self-power consumption of all the equipment of the unit can be obtained in the statistical period T
In the formula, TjFor the (j) th period of the cycle,
m is the total of m periods T of the statistical period Tj。
6) Self-consuming test and calibration
Firstly, preparing an electric energy quality tester calibrated by a national quality inspection agency, for example: fluke1760 and install Fluke1760 on the electrical supply line from the tank to the plant equipment.
And secondly, performing clock time synchronization operation on the Fluke1760 and the unit to ensure clock synchronization of the Fluke1760 and the unit.
And then, when the unit runs, the main control recording and broadcasting software and the Fluke1760 are opened to respectively record the total consumed electric power of the unit at each moment.
And comparing the hardware test energy consumption with the energy consumption calculated by the formula, and calculating a correction coefficient u.
Finally, the calculation formula of the fixed self-power consumption Q is as follows:
7) parametric curing
The operation current parameters and the correction coefficients u of each device are written into a program, relevant parameters can be seen on a human-computer interface, the self power consumption of relevant components and the total self power consumption value of the unit are transmitted to an SCADA (supervisory control and data acquisition) system of a main control system, the start-stop time of each component is optimized by combining the operation state of the unit, the optimal start-stop logic of the unit is achieved, namely the start-stop logic of each component is optimized by monitoring the state of each component and the self power consumption condition, and the self power consumption of the unit is further reduced.
In conclusion, the method can well replace the traditional hardware measurement mode, achieves the unit self-power consumption metering work through a software algorithm, optimizes the unit start-stop logic through the state monitoring and the self-power consumption condition of each component so as to reduce the unit self-power consumption, and has the advantages of high economic benefit, simplicity and convenience in operation, easiness in popularization, high practicability and popularization value.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. A self-power consumption software metering method of a wind generating set is characterized in that the wind generating set inevitably consumes a part of energy to meet the self-operation requirement in the normal operation process, the part of consumed energy is called the self-power consumption of the wind generating set, wherein the self-power consumption of the set mainly comes from the power consumption of motors, heaters, fans and a PLC module group; the self-power consumption software metering method is characterized by comprising the following steps of:
1) device grid voltage measurement
The method comprises the steps that a main control system of the wind generating set measures the voltage U of a power grid in real time, and the voltage conversion coefficient corresponding to each equipment voltage grade is multiplied by the voltage U, so that the actual voltage of the equipment can be obtained;
the voltage classes used by the equipment of the wind generating set are mainly divided into 690V, 400V and 230V, and each voltage conversion relation is as follows: 690V/1.732V-400V; 400V/1.732V/3;
if the voltage level of the ith device is 400V, the corresponding device voltage is UiU/1.732; if the voltage level of the ith device is 230V, the corresponding device voltage is Ui＝U/3；
2) Current measurement
Detecting the current value of each component in the unit during operation by using external current testing equipment, recording the current value of each component through multiple measurements, and obtaining the average current value I of each componentiI.e. the operating current of the ith device; the power supply of the PLC module group is 24V, the PLC module group is regarded as a device, and then the current value of the PLC module group under the corresponding power supply can be known by measuring the current at the power supply inlet side of the switching power supply supplying power to the PLC module group;
3) operating state bits, i.e. working bits
When the power grid is in a normal state, the protection switch of the equipment is in a closed state, and the contactor of the control equipment is in an attraction state, the equipment is in a normal working state, and the working flag bit k of the equipmentiSet to 1, otherwise, work flag bit kiIs 0, wherein kiRepresenting the working flag bit of the ith device;
4) total power consumption of a plant
By step 1)And 3), the real-time power supply voltage, the equipment running current value and the equipment running state of each equipment can be known, and the total self-consumption power of all the equipment of the unit is obtained by combining the physical formula P with UI and the equipment running state
Wherein n is the total number of devices, PiIs the self-consumption power of the ith device;
5) energy consumption of unit equipment
Obtaining the total self power consumption of all equipment of the unit in the statistical period T by using the physical formula Q of energy consumption as Pt
In the formula, TjFor the (j) th period of the cycle,
m is the total of m periods T of the statistical period Tj；
6) Self-consuming test and calibration
Firstly, preparing a calibrated electric energy quality tester and installing the tester on a power supply line from a box transformer to unit equipment;
secondly, the electric energy quality tester and the unit perform clock timing operation to ensure clock synchronization;
then, when the unit runs, the main control recording and broadcasting software and the electric energy quality tester are started to respectively record the total consumed electric power of the unit at each moment;
comparing the hardware test energy consumption with the energy consumption calculated by the formula, and calculating a correction coefficient u;
finally, the calculation formula of the fixed self-power consumption Q is as follows:
7) parametric curing
The running current parameters and the correction coefficients u of each device are written into a program, relevant parameters can be seen on a human-computer interface, the self-power consumption of relevant components and the total self-power consumption value of the unit are transmitted to a main control system of the unit, the start-stop time of each component is optimized by combining the running state of the unit, the optimal start-stop logic of the unit is achieved, namely the start-stop logic of each component is optimized by monitoring the state of each component and the self-power consumption condition, and the self-power consumption of the unit is further reduced.
2. The method for metering the self-consumption software of the wind generating set according to claim 1, characterized in that: the master control system is integrated with a voltage doubling module KL3403 or EL3413 and is used for measuring the power grid voltage U in real time.
3. The method for metering the self-consumption software of the wind generating set according to claim 1, characterized in that: the electric energy quality tester is Fluke 1760.
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